/* ==========================================================================
   AI-Trainer — Main Stylesheet
   Mobile-first responsive design with Light/Dark mode
   ========================================================================== */

/* --------------------------------------------------------------------------
   Font Face (Outfit — locally hosted)
   -------------------------------------------------------------------------- */

@font-face {
    font-family: 'Outfit';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('/assets/fonts/outfit-400.woff2') format('woff2');
}

@font-face {
    font-family: 'Outfit';
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url('/assets/fonts/outfit-500.woff2') format('woff2');
}

@font-face {
    font-family: 'Outfit';
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url('/assets/fonts/outfit-600.woff2') format('woff2');
}

@font-face {
    font-family: 'Outfit';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('/assets/fonts/outfit-700.woff2') format('woff2');
}

/* --------------------------------------------------------------------------
   CSS Custom Properties — Light Theme (default)
   -------------------------------------------------------------------------- */

:root {
    /* Colors */
    --color-primary: #2563EB;
    --color-primary-hover: #1D4ED8;
    --color-secondary: #7C3AED;
    --color-secondary-hover: #6D28D9;
    --color-accent: #10B981;
    --color-accent-hover: #059669;
    --color-error: #EF4444;
    --color-error-hover: #DC2626;
    --color-warning: #F59E0B;
    --color-info: #3B82F6;
    --color-success: #10B981;
    --color-danger: #EF4444;
    --color-violet: #8B5CF6;

    /* Surfaces */
    --bg-body: #F8FAFC;
    --bg-surface: #FFFFFF;
    --bg-surface-alt: #F1F5F9;
    --bg-header: #FFFFFF;
    --bg-footer: #1E293B;

    /* Text */
    --text-primary: #1E293B;
    --text-secondary: #4A5568;
    --text-muted: #566379;
    --text-inverse: #FFFFFF;
    --text-link: #2563EB;
    --text-link-hover: #1D4ED8;

    /* Borders */
    --border-color: #E2E8F0;
    --border-color-strong: #CBD5E1;
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
    --border-radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Typography */
    --font-family: 'Outfit', system-ui, -apple-system, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --line-height: 1.6;
    --line-height-tight: 1.25;

    /* Layout */
    --container-max: 1200px;
    --header-height: 64px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    /* Aliases — shorthand vars used in contact, faq, search, quiz, static pages, forms */
    --sp-xs: var(--space-xs);
    --sp-sm: var(--space-sm);
    --sp-md: var(--space-md);
    --sp-lg: var(--space-lg);
    --sp-xl: var(--space-xl);
    --color-border: var(--border-color);
    --color-surface: var(--bg-surface);
    --color-bg: var(--bg-body);
    --color-text: var(--text-primary);
    --color-muted: var(--text-muted);
    --color-text-muted: var(--text-muted);
    --color-text-secondary: var(--text-secondary);
    --text-body: var(--text-secondary);
    --primary: var(--color-primary);
    --radius-md: var(--border-radius);
    --radius-lg: var(--border-radius-lg);
    --radius-full: var(--border-radius-full);
    --radius: var(--border-radius);
    --color-card-bg: var(--bg-surface);
}

/* --------------------------------------------------------------------------
   Dark Theme
   -------------------------------------------------------------------------- */

[data-theme="dark"] {
    --color-primary: #60A5FA;
    --color-primary-hover: #93C5FD;
    --color-secondary: #A78BFA;
    --color-secondary-hover: #C4B5FD;
    --color-accent: #34D399;
    --color-accent-hover: #6EE7B7;
    --color-success: #34D399;

    --bg-body: #0F172A;
    --bg-surface: #1E293B;
    --bg-surface-alt: #334155;
    --bg-header: #1E293B;
    --bg-footer: #0F172A;

    --text-primary: #F1F5F9;
    --text-secondary: #A8B8CB;
    --text-muted: #8896A8;
    --text-inverse: #0F172A;
    --text-link: #60A5FA;
    --text-link-hover: #93C5FD;

    --border-color: #334155;
    --border-color-strong: #475569;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);

    /* Aliases — must re-map in dark mode since base vars change */
    --color-border: var(--border-color);
    --color-surface: var(--bg-surface);
    --color-bg: var(--bg-body);
    --color-text: var(--text-primary);
    --color-muted: var(--text-muted);
    --color-text-muted: var(--text-muted);
    --color-text-secondary: var(--text-secondary);
    --color-card-bg: var(--bg-surface);
}

/* --------------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------------- */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

/* Skip navigation link (accessibility) */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    z-index: 9999;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--border-radius);
    font-weight: 700;
    text-decoration: none;
}
.skip-link:focus {
    top: var(--space-sm);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--text-primary);
    background-color: var(--bg-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

img, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: var(--text-link);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--text-link-hover);
}

ul, ol {
    list-style: none;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

/* Focus-visible for keyboard accessibility (WCAG 2.4.7) */
:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}
:focus:not(:focus-visible) {
    outline: none;
}

/* Button styled as link (accessibility: use <button> instead of <a onclick>) */
.link-button {
    background: none;
    border: none;
    color: inherit;
    font: inherit;
    padding: 0;
    cursor: pointer;
    text-align: left;
}
.link-button:hover {
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-tight);
    font-weight: 700;
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-4xl); margin-bottom: var(--space-lg); }
h2 { font-size: var(--font-size-3xl); margin-bottom: var(--space-md); }
h3 { font-size: var(--font-size-2xl); margin-bottom: var(--space-md); }
h4 { font-size: var(--font-size-xl);  margin-bottom: var(--space-sm); }
h5 { font-size: var(--font-size-lg);  margin-bottom: var(--space-sm); }
h6 { font-size: var(--font-size-base); margin-bottom: var(--space-sm); }

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

strong { font-weight: 600; }

small { font-size: var(--font-size-sm); }

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

main {
    flex: 1;
    padding: var(--space-2xl) 0;
}

.section {
    padding: var(--space-3xl) 0;
}

/* Grid utilities */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(1, 1fr); }
.grid-3 { grid-template-columns: repeat(1, 1fr); }

.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.text-center { text-align: center; }

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header {
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.site-logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.site-logo:hover {
    color: var(--color-primary);
}

.site-logo .logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
}

.site-logo-text {
    font-size: var(--font-size-xl);
    font-weight: 800;
    letter-spacing: -0.02em;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */

.nav-main {
    display: none;
    gap: var(--space-xs);
}

.nav-main a {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-main a:hover,
.nav-main a.active {
    color: var(--color-primary);
    background: var(--bg-surface-alt);
}

/* Header actions (theme toggle, lang, auth) */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.header-actions .desktop-only {
    display: none;
}

@media (min-width: 1024px) {
    .header-actions .desktop-only {
        display: flex;
    }
}

/* Mobile menu toggle */
.mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.mobile-menu-btn:hover {
    color: var(--text-primary);
    background: var(--bg-surface-alt);
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
}

/* Logout form in nav (styled as link) */
.nav-logout-form { display: inline; }
.nav-logout-btn {
    background: none;
    border: none;
    color: inherit;
    font: inherit;
    cursor: pointer;
    padding: 0;
    text-decoration: none;
}
.nav-logout-btn:hover { opacity: 0.8; }

/* Mobile nav overlay */
.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-surface);
    z-index: 99;
    padding: var(--space-lg);
    overflow-y: auto;
}

.mobile-nav.open {
    display: block;
}

.mobile-nav a {
    display: block;
    padding: var(--space-md);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
}

.mobile-nav a:hover {
    color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Search Bar
   -------------------------------------------------------------------------- */

.search-bar {
    position: relative;
}

.search-bar input {
    padding: var(--space-sm) var(--space-md);
    padding-left: 2.25rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-full);
    background: var(--bg-surface-alt);
    width: 200px;
    font-size: var(--font-size-sm);
    transition: border-color var(--transition-fast), width var(--transition-normal);
    outline: none;
}

.search-bar input:focus {
    border-color: var(--color-primary);
    width: 280px;
}

.search-bar .search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    pointer-events: none;
}

/* --------------------------------------------------------------------------
   Theme Toggle
   -------------------------------------------------------------------------- */

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--text-primary);
    background: var(--bg-surface-alt);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.theme-toggle .icon-sun,
[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

.theme-toggle .icon-moon {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

/* --------------------------------------------------------------------------
   Language Switcher
   -------------------------------------------------------------------------- */

.lang-switcher {
    display: flex;
    gap: 2px;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.lang-switcher a {
    padding: var(--space-sm) var(--space-sm);
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    border-radius: var(--border-radius-sm);
    color: var(--text-muted);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.lang-switcher a:hover {
    color: var(--text-primary);
}

.lang-switcher a.active {
    color: var(--color-primary);
    background: var(--bg-surface-alt);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.625rem 1.25rem;
    font-weight: 600;
    font-size: var(--font-size-sm);
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    box-sizing: border-box;
    transition: background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
    cursor: pointer;
    font-family: inherit;
    line-height: inherit;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--text-inverse);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    color: var(--text-inverse);
}

.btn-secondary {
    background: var(--bg-surface-alt);
    color: var(--text-primary);
    border: 1px solid var(--border-color-strong);
}

.btn-secondary:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.btn-accent {
    background: var(--color-accent);
    color: var(--text-inverse);
}

.btn-accent:hover {
    background: var(--color-accent-hover);
    color: var(--text-inverse);
}

.btn-lg {
    padding: 0.75rem 1.75rem;
    font-size: var(--font-size-base);
    border-radius: var(--border-radius-lg);
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: var(--font-size-xs);
}

.btn.is-loading {
    pointer-events: none;
    opacity: 0.7;
    position: relative;
    color: transparent;
}

.btn.is-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin: -8px 0 0 -8px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: btn-spin 0.6s linear infinite;
}

.btn.is-loading::after {
    color: var(--text-inverse);
}

@keyframes btn-spin {
    to { transform: rotate(360deg); }
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.625rem var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-surface);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-error {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--space-xs);
}

/* --------------------------------------------------------------------------
   Flash Messages
   -------------------------------------------------------------------------- */

.flash-message {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    font-weight: 500;
    animation: flashSlideIn 0.3s ease-out;
    position: relative;
    z-index: 3;
}

.flash-message.success {
    background: #ECFDF5;
    color: #065F46;
    border: 1px solid #A7F3D0;
}

.flash-message.error {
    background: #FEF2F2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

.flash-message.info {
    background: #EFF6FF;
    color: #1E40AF;
    border: 1px solid #BFDBFE;
}

.flash-message.warning {
    background: #FFFBEB;
    color: #92400E;
    border: 1px solid #FDE68A;
}

[data-theme="dark"] .flash-message.success {
    background: #064E3B;
    color: #A7F3D0;
    border-color: #065F46;
}

[data-theme="dark"] .flash-message.error {
    background: #7F1D1D;
    color: #FECACA;
    border-color: #991B1B;
}

[data-theme="dark"] .flash-message.info {
    background: #1E3A5F;
    color: #BFDBFE;
    border-color: #1E40AF;
}

[data-theme="dark"] .flash-message.warning {
    background: #78350F;
    color: #FDE68A;
    border-color: #92400E;
}

.flash-close {
    background: none;
    border: none;
    color: inherit;
    opacity: 0.6;
    cursor: pointer;
    font-size: var(--font-size-lg);
    line-height: 1;
    padding: var(--space-xs);
}

.flash-close:hover {
    opacity: 1;
}

@keyframes flashSlideIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Flash over hero — overlay instead of push */
.container:has(> .hero--with-bg) {
    position: relative;
}

.container:has(> .hero--with-bg) > .flash-message {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 4;
    margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */

.hero {
    text-align: center;
    padding: var(--space-3xl) 0;
}

.hero h1 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.hero p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Hero with background image — remove class "hero--with-bg" to revert */
.hero.hero--with-bg {
    position: relative;
    width: 100vw;
    margin-left: calc(50% - 50vw);
    margin-top: calc(-1 * var(--space-2xl));
    padding: calc(6rem + 65px) var(--space-xl) calc(6rem + 115px);
    background: url('/assets/img/site/hero_01.webp') center center / cover no-repeat;
}

.hero--with-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.78);
}

[data-theme="dark"] .hero--with-bg::before {
    background: rgba(15, 15, 25, 0.82);
}

.hero--with-bg h1,
.hero--with-bg p,
.hero--with-bg .hero-actions {
    position: relative;
    z-index: 1;
}

.hero--with-bg h1 {
    color: #0f172a;
}

.hero--with-bg p {
    color: #334155;
}

[data-theme="dark"] .hero--with-bg h1 {
    color: #f1f5f9;
}

[data-theme="dark"] .hero--with-bg p {
    color: #cbd5e1;
}

/* --------------------------------------------------------------------------
   USP Section
   -------------------------------------------------------------------------- */

/* Overlap into hero when hero--with-bg is active (no promo banner) */
.hero--with-bg + .section .usp-grid {
    margin-top: -140px;
    position: relative;
    z-index: 2;
}

.usp-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
}

.usp-card {
    text-align: center;
    padding: var(--space-xl);
    background: var(--bg-surface);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.usp-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.usp-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-md);
    color: var(--color-primary);
}

.usp-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
}

.usp-card p {
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Course Cards (placeholder structure)
   -------------------------------------------------------------------------- */

.course-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.course-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.course-card-img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    background: var(--bg-surface-alt);
}

.course-card-body {
    padding: var(--space-lg);
}

.course-card-body h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-xs);
}

.course-card-body p {
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-md);
}

.course-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-beginner { background: #DBEAFE; color: #1E40AF; }
.badge-intermediate { background: #FEF3C7; color: #92400E; }
.badge-advanced { background: #FCE7F3; color: #9D174D; }
.badge-free { background: #D1FAE5; color: #065F46; }
.badge-new { background: #FEE2E2; color: #991B1B; animation: badge-pulse 2s ease-in-out infinite; }
.badge-completed { background: #065F46; color: #ffffff; }
.badge-preview { background: #E0E7FF; color: #3730A3; }

@keyframes badge-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

[data-theme="dark"] .badge-beginner { background: #1E3A5F; color: #93C5FD; }
[data-theme="dark"] .badge-intermediate { background: #78350F; color: #FDE68A; }
[data-theme="dark"] .badge-advanced { background: #831843; color: #F9A8D4; }
[data-theme="dark"] .badge-free { background: #064E3B; color: #6EE7B7; }
[data-theme="dark"] .badge-completed { background: #059669; color: #ffffff; }
[data-theme="dark"] .badge-new { background: #7F1D1D; color: #FCA5A5; }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
    background: var(--bg-footer);
    color: var(--text-inverse);
    padding: var(--space-3xl) 0 var(--space-xl);
    margin-top: auto;
}

[data-theme="dark"] .site-footer {
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
}

.footer-logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: #F1F5F9;
    margin-bottom: var(--space-sm);
}

.footer-about {
    color: #94A3B8;
    font-size: var(--font-size-sm);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.footer-social {
    display: flex;
    gap: var(--space-md);
}

.footer-social a {
    color: #94A3B8;
    transition: color var(--transition-fast);
}

.footer-social a:hover {
    color: #FFFFFF;
}

.footer-col h4 {
    color: #F1F5F9;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-col ul li + li {
    margin-top: var(--space-sm);
}

.footer-col a,
.footer-col .link-button {
    color: #94A3B8;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-col a:hover,
.footer-col .link-button:hover {
    color: #FFFFFF;
}

.footer-newsletter--below-about { margin-top: 20px; }

.footer-newsletter-text {
    color: #94A3B8;
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-sm);
}

.newsletter-form {
    display: flex;
    gap: var(--space-xs);
}

.newsletter-form input {
    flex: 1;
    padding: 0.4rem 0.75rem;
    border: 1px solid #475569;
    border-radius: var(--border-radius-sm);
    background: #1E293B;
    color: #F1F5F9;
    font-size: var(--font-size-sm);
}

.newsletter-form input::placeholder {
    color: #64748B;
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.newsletter-status {
    font-size: var(--font-size-xs);
    margin-top: var(--space-xs);
    min-height: 1.2em;
}

.newsletter-status.success { color: var(--color-accent); }
.newsletter-status.error { color: #F87171; }
.newsletter-status.info { color: #94A3B8; }

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    padding-top: var(--space-xl);
    margin-top: var(--space-xl);
    border-top: 1px solid #334155;
    font-size: var(--font-size-xs);
    color: #64748B;
}

.footer-bottom .lang-switcher a {
    color: #64748B;
}

.footer-bottom .lang-switcher a.active {
    color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   404 Page
   -------------------------------------------------------------------------- */

.error-page {
    text-align: center;
    padding: var(--space-3xl) 0;
    margin-bottom: 250px;
}

.error-page h1 {
    font-size: 6rem;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
    line-height: 1;
}

.error-page h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
}

.error-page p {
    font-size: var(--font-size-lg);
    max-width: 500px;
    margin: 0 auto var(--space-xl);
}

.error-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   Stats Counter
   -------------------------------------------------------------------------- */

.stats-section {
    background: var(--bg-surface);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    text-align: center;
}

.stat-item {
    padding: var(--space-lg) var(--space-md);
}

.stat-number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.stat-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   Testimonials
   -------------------------------------------------------------------------- */

.testimonial-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.testimonial-stars {
    display: flex;
    gap: 2px;
}

.testimonial-text {
    font-style: italic;
    color: var(--text-primary);
    line-height: var(--line-height);
    margin: 0;
    flex: 1;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.testimonial-author strong {
    color: var(--text-primary);
}

.testimonial-author span {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Learning Path
   -------------------------------------------------------------------------- */

.learning-path {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: var(--space-2xl);
}

.learning-path::before {
    content: '';
    position: absolute;
    left: 18px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.path-item {
    position: relative;
    display: flex;
    gap: var(--space-lg);
    padding-bottom: var(--space-xl);
}

.path-item:last-child {
    padding-bottom: 0;
}

.path-marker {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-full);
    background: var(--color-primary);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
    position: relative;
    z-index: 1;
    margin-left: calc(-1 * var(--space-2xl));
}

.path-card {
    flex: 1;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.path-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.path-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin-bottom: var(--space-sm);
}

.path-card-title {
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-size-lg);
}

.path-card-title:hover {
    color: var(--color-primary);
}

.path-card-desc {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0 0 var(--space-sm);
    line-height: var(--line-height);
}

.path-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.path-price {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.path-price-free {
    color: var(--color-success);
}

/* --------------------------------------------------------------------------
   Pricing
   -------------------------------------------------------------------------- */

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    max-width: 960px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    position: relative;
}

.pricing-card-featured {
    border-color: var(--color-primary);
    border-width: 2px;
    box-shadow: var(--shadow-lg);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--text-inverse);
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--border-radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pricing-card-title {
    font-size: var(--font-size-xl);
    margin: 0 0 var(--space-md);
}

.pricing-card-price {
    margin-bottom: var(--space-lg);
}

.pricing-from {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.pricing-amount {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-xl);
    flex: 1;
}

.pricing-features li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    padding-left: var(--space-xl);
    position: relative;
}

.pricing-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 16px;
    height: 16px;
    transform: translateY(-50%);
    background: var(--color-success);
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8l3.5 3.5L13 5' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8l3.5 3.5L13 5' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

.pricing-features li:last-child {
    border-bottom: none;
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

/* --------------------------------------------------------------------------
   Final CTA
   -------------------------------------------------------------------------- */

.final-cta {
    background: var(--bg-surface-alt);
    border-radius: var(--border-radius-lg);
    padding: var(--space-3xl) var(--space-xl);
    text-align: center;
}

.final-cta h2 {
    margin: 0 0 var(--space-md);
}

.final-cta p {
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto var(--space-xl);
    font-size: var(--font-size-lg);
}

/* --------------------------------------------------------------------------
   Scroll Animations
   -------------------------------------------------------------------------- */

[data-animate] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --------------------------------------------------------------------------
   Scroll to Top Button
   -------------------------------------------------------------------------- */

.scroll-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-full);
    background: var(--color-primary);
    color: var(--text-inverse);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.2s ease;
    z-index: 100;
    pointer-events: none;
}

.scroll-to-top.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.scroll-to-top:hover {
    background: var(--color-primary-hover);
}

/* --------------------------------------------------------------------------
   Responsive — Tablet (640px+)
   -------------------------------------------------------------------------- */

@media (min-width: 640px) {
    .usp-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero h1 {
        font-size: 2.75rem;
    }

    .search-bar input {
        width: 240px;
    }

    .search-bar input:focus {
        width: 320px;
    }
}

/* --------------------------------------------------------------------------
   Responsive — Tablet landscape (768px+)
   -------------------------------------------------------------------------- */

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-xl);
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --------------------------------------------------------------------------
   Responsive — Desktop (1024px+)
   -------------------------------------------------------------------------- */

@media (min-width: 1024px) {
    .nav-main {
        display: flex;
    }

    .mobile-menu-btn {
        display: none;
    }

    .usp-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .hero h1 {
        font-size: var(--font-size-4xl);
    }

    .hero {
        padding: var(--space-3xl) 0 var(--space-2xl);
    }

    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

/* --------------------------------------------------------------------------
   Responsive — Wide Desktop (1280px+)
   -------------------------------------------------------------------------- */

@media (min-width: 1280px) {
    :root {
        --container-max: 1280px;
    }
}

/* --------------------------------------------------------------------------
   Utility classes
   -------------------------------------------------------------------------- */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.spacer-sm { height: 50px; }
.spacer-md { height: 100px; }
.spacer-lg { height: 200px; }
.spacer-xg { height: 300px; }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.text-muted { color: var(--text-muted); }

/* --------------------------------------------------------------------------
   Auth pages (login, register, forgot-password, reset-password)
   -------------------------------------------------------------------------- */

.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
    padding: var(--space-lg) var(--space-md);
}

.auth-card {
    width: 100%;
    max-width: 440px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl) var(--space-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.auth-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin: 0 0 var(--space-sm);
    color: var(--text-primary);
}

.auth-description {
    text-align: center;
    color: var(--text-muted);
    margin: 0 0 var(--space-lg);
    font-size: 0.9rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-lg);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--primary);
    font-weight: 500;
}

.auth-link {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.auth-link:hover {
    color: var(--primary);
}

.input-with-toggle {
    position: relative;
}

.input-with-toggle .form-control {
    padding-right: 2.75rem;
}

.toggle-password {
    position: absolute;
    right: 0.625rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    padding: 0.25rem;
    line-height: 1;
    display: flex;
    align-items: center;
}

.toggle-password:hover {
    color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Form components
   -------------------------------------------------------------------------- */

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-body);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-body);
    color: var(--text-body);
    font-family: inherit;
    font-size: 0.9375rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.125rem;
}

.form-row {
    display: flex;
    gap: var(--space-md);
}

.form-row--half > * {
    flex: 1;
}

.form-row--between {
    justify-content: space-between;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.875rem;
    cursor: pointer;
    color: var(--text-body);
}

.checkbox-label input[type="checkbox"] {
    accent-color: var(--primary);
    width: 1rem;
    height: 1rem;
}

/* --------------------------------------------------------------------------
   Buttons (extended)
   -------------------------------------------------------------------------- */

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

.btn-danger {
    background-color: #dc2626;
    color: #fff;
}

.btn-danger:hover {
    background-color: #b91c1c;
}

/* --------------------------------------------------------------------------
   Card component
   -------------------------------------------------------------------------- */

.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.card h2 {
    margin-top: 0;
    margin-bottom: var(--space-md);
    font-size: 1.2rem;
    font-weight: 600;
}

.card--danger {
    border-color: #fca5a5;
}

[data-theme="dark"] .card--danger {
    border-color: #991b1b;
}

/* --------------------------------------------------------------------------
   Dashboard page
   -------------------------------------------------------------------------- */

.dashboard-page {
    padding: var(--space-xl) 0;
}

.dashboard-page h1 {
    margin-bottom: var(--space-lg);
}

.dashboard-welcome {
    margin-bottom: var(--space-xl);
    color: var(--text-muted);
}

.dashboard-section {
    margin-bottom: var(--space-xl);
}

.dashboard-section h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.dashboard-empty {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    text-align: center;
    color: var(--text-muted);
}

.dashboard-empty .btn {
    margin-top: var(--space-md);
}

/* --------------------------------------------------------------------------
   Profile page
   -------------------------------------------------------------------------- */

.profile-page {
    padding: var(--space-xl) 0;
}

.profile-page h1 {
    margin-bottom: var(--space-lg);
}

.profile-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

/* --------------------------------------------------------------------------
   Auth responsive (mobile adjustments)
   -------------------------------------------------------------------------- */

@media (max-width: 639px) {
    .auth-card {
        padding: var(--space-lg) var(--space-md);
    }

    .form-row--half {
        flex-direction: column;
    }

    .form-row--between {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: flex-start;
    }
}

/* --------------------------------------------------------------------------
   Course card
   -------------------------------------------------------------------------- */

.course-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    text-decoration: none;
    color: var(--text-primary);
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.course-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.course-card-thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    background: var(--bg-surface-alt);
    overflow: hidden;
}

.course-card-thumb img,
.course-card-thumb > svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.course-card-thumb-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--bg-surface-alt), var(--border-color));
}

.course-card-thumb .badge {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
}

.course-card-thumb .badge-free {
    left: auto;
    right: var(--space-sm);
}

.course-card-thumb .badge-new {
    top: auto;
    bottom: var(--space-sm);
}

.course-card-thumb .badge-completed {
    left: auto;
    right: var(--space-sm);
    top: auto;
    bottom: var(--space-sm);
}

.course-card-path-num {
    font-weight: 600;
    color: var(--color-primary);
}

.course-card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--space-md);
}

.course-card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-xs);
    line-height: var(--line-height-tight);
}

.course-card-desc {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    flex: 1;
}

.course-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.course-card-meta span::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 4px;
    background: var(--text-muted);
    border-radius: 50%;
    vertical-align: middle;
    margin-right: var(--space-xs);
}

.course-card-meta span:first-child::before {
    display: none;
}

.course-card-price {
    font-weight: 600;
    color: var(--color-primary);
    font-size: var(--font-size-base);
}

/* --------------------------------------------------------------------------
   Badge additions
   -------------------------------------------------------------------------- */

.badge-preview {
    background: #E0E7FF;
    color: #3730A3;
    font-size: var(--font-size-xs);
}

[data-theme="dark"] .badge-preview {
    background: #312E81;
    color: #A5B4FC;
}

.badge-category {
    background: var(--bg-surface-alt);
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Progress bar
   -------------------------------------------------------------------------- */

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-surface-alt);
    border-radius: var(--border-radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--border-radius-full);
    transition: width var(--transition-normal);
    min-width: 0;
}

.progress-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

/* --------------------------------------------------------------------------
   Button additions
   -------------------------------------------------------------------------- */

.btn-success {
    background: var(--color-success);
    color: #fff;
    cursor: default;
}

[data-theme="dark"] .btn-success {
    color: var(--text-inverse);
}

/* --------------------------------------------------------------------------
   Catalog page
   -------------------------------------------------------------------------- */

.catalog-page {
    padding: var(--space-xl) 0;
}

.catalog-page h1 {
    margin-bottom: var(--space-lg);
}

.catalog-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    align-items: flex-end;
    padding: var(--space-md);
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.filter-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.filter-group select {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-body);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    min-width: 160px;
}

.filter-actions {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-end;
}

.filter-actions .btn {
    flex: 1 1 0;
    min-width: 0;
    text-align: center;
}

.catalog-empty {
    text-align: center;
    padding: var(--space-3xl) var(--space-md);
    color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-xs);
    margin-top: var(--space-xl);
    flex-wrap: wrap;
}

.pagination-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-surface);
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.pagination-link:hover {
    background: var(--bg-surface-alt);
}

.pagination-link.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.pagination-ellipsis {
    padding: 0 var(--space-xs);
    color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Course detail page
   -------------------------------------------------------------------------- */

.course-detail-page {
    padding: var(--space-xl) 0;
}

.course-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.course-header-badges {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.course-header-content h1 {
    font-size: var(--font-size-3xl);
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-md);
}

.course-header-desc {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: var(--line-height);
}

.course-meta-detail {
    display: flex;
    gap: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
}

.course-header-cta {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    align-items: flex-start;
}

.course-price-large {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.course-header-image {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.course-header-image img,
.course-header-image > svg {
    width: 100%;
    height: auto;
    display: block;
}

.course-about-text {
    color: var(--text-secondary);
    line-height: var(--line-height);
}

.course-about-text h2,
.course-about-text h3 {
    color: var(--text-primary);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.course-about-text p {
    margin-bottom: var(--space-md);
}

/* --------------------------------------------------------------------------
   Lesson list (course detail)
   -------------------------------------------------------------------------- */

.lesson-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.lesson-list-item {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-sm);
}

.lesson-list-item a {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: background var(--transition-fast);
}

.lesson-list-item a:hover {
    background: var(--bg-surface-alt);
}

.lesson-list-item.is-locked a {
    opacity: 0.5;
    cursor: not-allowed;
}

.lesson-list-item.is-completed a {
    background: color-mix(in srgb, var(--color-success) 5%, transparent);
}

.lesson-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg-surface-alt);
    border-radius: var(--border-radius-full);
}

.lesson-list-title {
    flex: 1;
    font-weight: 500;
}

.lesson-list-time {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Lesson layout (3-column: sidebar | content | notes)
   -------------------------------------------------------------------------- */

.lesson-layout {
    display: flex;
    gap: 0;
    margin: calc(-1 * var(--space-md));
    min-height: calc(100vh - var(--header-height) - 120px);
}

.lesson-sidebar {
    width: 280px;
    flex-shrink: 0;
    background: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    position: sticky;
    top: var(--header-height);
    height: calc(100vh - var(--header-height));
}

.lesson-sidebar-header {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.lesson-sidebar-back {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-link);
    text-decoration: none;
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

.lesson-sidebar-back:hover {
    color: var(--text-link-hover);
}

.lesson-sidebar-progress {
    padding-top: var(--space-sm);
}

.lesson-sidebar-list {
    padding: var(--space-sm) 0;
}

.lesson-sidebar-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    transition: background var(--transition-fast);
    border-left: 3px solid transparent;
}

.lesson-sidebar-item:hover {
    background: var(--bg-surface-alt);
}

.lesson-sidebar-item.is-current {
    background: var(--bg-surface-alt);
    border-left-color: var(--color-primary);
    font-weight: 600;
}

.lesson-sidebar-item.is-completed .lesson-number {
    color: var(--color-success);
    background: color-mix(in srgb, var(--color-success) 10%, transparent);
}

.lesson-sidebar-item.is-locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.lesson-sidebar-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.lesson-sidebar-time {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Lesson main content
   -------------------------------------------------------------------------- */

.lesson-main {
    flex: 1;
    min-width: 0;
    padding: var(--space-lg) var(--space-xl);
}

.lesson-content {
    max-width: 800px;
}

/* Breadcrumbs (reusable) */
.breadcrumbs {
    margin-bottom: var(--space-lg);
}

.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.breadcrumb-list li + li::before {
    content: '/';
    margin-right: var(--space-xs);
    color: var(--text-muted);
}

.breadcrumb-list a {
    color: var(--text-link);
    text-decoration: none;
}

.breadcrumb-list a:hover {
    text-decoration: underline;
}

.breadcrumb-list [aria-current="page"] {
    color: var(--text-primary);
    font-weight: 500;
}

.lesson-content h1 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-lg);
}

/* --------------------------------------------------------------------------
   Video container (16:9)
   -------------------------------------------------------------------------- */

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: var(--border-radius);
    background: #000;
    margin-bottom: var(--space-xl);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.video-container--native {
    padding-bottom: 0;
    height: auto;
}

.video-container--native video {
    width: 100%;
    border-radius: var(--border-radius);
}

/* --------------------------------------------------------------------------
   Lesson text (rendered HTML content)
   -------------------------------------------------------------------------- */

.lesson-text {
    line-height: var(--line-height);
    color: var(--text-primary);
    margin-bottom: var(--space-xl);
}

.lesson-text h2 { font-size: var(--font-size-xl); margin: var(--space-xl) 0 var(--space-md); }
.lesson-text h3 { font-size: var(--font-size-lg); margin: var(--space-lg) 0 var(--space-sm); }
.lesson-text p { margin-bottom: var(--space-md); }
.lesson-text ul, .lesson-text ol { margin-bottom: var(--space-md); padding-left: var(--space-lg); }
.lesson-text li { margin-bottom: var(--space-xs); }
.lesson-text img { max-width: 100%; height: auto; border-radius: var(--border-radius); margin: var(--space-md) 0; }
.lesson-text blockquote {
    border-left: 3px solid var(--color-primary);
    padding: var(--space-sm) var(--space-md);
    margin: var(--space-md) 0;
    background: var(--bg-surface-alt);
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}
.lesson-text code {
    background: var(--bg-surface-alt);
    padding: 2px 6px;
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
}
.lesson-text pre {
    background: var(--bg-surface-alt);
    padding: var(--space-md);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin-bottom: var(--space-md);
}
.lesson-text pre code {
    background: none;
    padding: 0;
}

/* --------------------------------------------------------------------------
   Lesson content boxes (tip, warning, info, example, takeaway, quote, code)
   -------------------------------------------------------------------------- */

/* Shared base for all content boxes */
.lesson-text .lesson-tip,
.lesson-text .lesson-warning,
.lesson-text .lesson-info,
.lesson-text .lesson-example,
.lesson-text .lesson-takeaway,
.lesson-text .lesson-quote {
    position: relative;
    border-left: 4px solid;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    padding: var(--space-md) var(--space-lg);
    padding-left: calc(var(--space-lg) + 1.5rem);
    margin: var(--space-lg) 0;
    line-height: 1.7;
}

.lesson-text .lesson-tip::before,
.lesson-text .lesson-warning::before,
.lesson-text .lesson-info::before,
.lesson-text .lesson-example::before,
.lesson-text .lesson-takeaway::before,
.lesson-text .lesson-quote::before {
    position: absolute;
    left: var(--space-sm);
    top: var(--space-md);
    font-size: 1.1rem;
    line-height: 1;
}

/* Tip box — green */
.lesson-text .lesson-tip {
    border-color: var(--color-success);
    background: rgba(16, 185, 129, 0.08);
}
.lesson-text .lesson-tip::before { content: '\1F4A1'; }

/* Warning box — amber */
.lesson-text .lesson-warning {
    border-color: var(--color-warning);
    background: rgba(245, 158, 11, 0.08);
}
.lesson-text .lesson-warning::before { content: '\26A0\FE0F'; }

/* Info box — blue */
.lesson-text .lesson-info {
    border-color: var(--color-info);
    background: rgba(59, 130, 246, 0.08);
}
.lesson-text .lesson-info::before { content: '\2139\FE0F'; }

/* Example box — violet */
.lesson-text .lesson-example {
    border-color: var(--color-violet);
    background: rgba(139, 92, 246, 0.08);
}
.lesson-text .lesson-example::before { content: '\1F4BB'; }

/* Takeaway box — primary blue */
.lesson-text .lesson-takeaway {
    border-color: var(--color-primary);
    background: rgba(37, 99, 235, 0.06);
}
.lesson-text .lesson-takeaway::before { content: '\2B50'; }

/* Quote box — muted/slate */
.lesson-text .lesson-quote {
    border-color: #64748B;
    background: transparent;
    padding-left: calc(var(--space-lg) + 2rem);
    font-style: italic;
}
.lesson-text .lesson-quote::before {
    content: '\201C';
    font-size: 2.5rem;
    font-style: normal;
    color: #94A3B8;
    top: 0.2rem;
    left: var(--space-xs);
    line-height: 1;
}

/* Code block — dark */
.lesson-text .lesson-code {
    background: #1E293B;
    color: #E2E8F0;
    border-radius: var(--border-radius);
    padding: var(--space-md) var(--space-lg);
    margin: var(--space-lg) 0;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.6;
}
.lesson-text .lesson-code code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
}

/* Content box headings */
.lesson-text .lesson-tip > strong:first-child,
.lesson-text .lesson-warning > strong:first-child,
.lesson-text .lesson-info > strong:first-child,
.lesson-text .lesson-example > strong:first-child,
.lesson-text .lesson-takeaway > strong:first-child {
    display: block;
    margin-bottom: var(--space-xs);
    font-size: var(--font-size-base);
}

/* --------------------------------------------------------------------------
   Comparison component (before/after, do/don't)
   -------------------------------------------------------------------------- */

.lesson-text .lesson-comparison {
    display: flex;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
}
.lesson-text .lesson-comparison .before,
.lesson-text .lesson-comparison .after {
    flex: 1;
    padding: var(--space-md);
    border-radius: var(--border-radius);
    line-height: 1.7;
}
.lesson-text .lesson-comparison .before {
    background: rgba(239, 68, 68, 0.06);
    border-left: 3px solid var(--color-danger);
}
.lesson-text .lesson-comparison .after {
    background: rgba(16, 185, 129, 0.06);
    border-left: 3px solid var(--color-success);
}
.lesson-text .lesson-comparison .before strong:first-child,
.lesson-text .lesson-comparison .after strong:first-child {
    display: block;
    margin-bottom: var(--space-xs);
}

/* --------------------------------------------------------------------------
   Collapsible details (within lesson text)
   -------------------------------------------------------------------------- */

.lesson-text details {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin: var(--space-md) 0;
    overflow: hidden;
}
.lesson-text details summary {
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    font-weight: 600;
    background: var(--bg-surface-alt);
    transition: background 0.2s;
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}
.lesson-text details summary::-webkit-details-marker { display: none; }
.lesson-text details summary::before {
    content: '+';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    border-radius: var(--border-radius-sm);
    background: var(--color-primary);
    color: #fff;
    font-size: 0.875rem;
    font-weight: 700;
    flex-shrink: 0;
    transition: transform 0.2s;
}
.lesson-text details[open] summary::before {
    content: '\2212';
    transform: rotate(0deg);
}
.lesson-text details summary:hover { background: rgba(37, 99, 235, 0.06); }
.lesson-text details > div,
.lesson-text details > p {
    padding: var(--space-md);
}

/* --------------------------------------------------------------------------
   Mini comprehension check
   -------------------------------------------------------------------------- */

.lesson-text .lesson-check {
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    margin: var(--space-lg) 0;
    background: var(--bg-surface);
}
.lesson-text .check-question {
    font-weight: 600;
    margin-bottom: var(--space-md);
    font-size: var(--font-size-base);
}
.lesson-text .check-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}
.lesson-text .check-options button {
    text-align: left;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-surface);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    color: var(--text-primary);
}
.lesson-text .check-options button:hover:not(:disabled) {
    border-color: var(--color-primary);
    background: rgba(37, 99, 235, 0.04);
}
.lesson-text .check-options button.correct {
    border-color: var(--color-success);
    background: rgba(16, 185, 129, 0.1);
    color: #065F46;
}
.lesson-text .check-options button.wrong {
    border-color: var(--color-danger);
    background: rgba(239, 68, 68, 0.1);
    color: #991B1B;
}
.lesson-text .check-options button:disabled { cursor: default; opacity: 0.7; }
.lesson-text .check-feedback {
    margin-top: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    display: none;
}
.lesson-text .check-feedback.visible { display: block; }
.lesson-text .check-feedback.correct {
    background: rgba(16, 185, 129, 0.1);
    color: #065F46;
}
.lesson-text .check-feedback.wrong {
    background: rgba(239, 68, 68, 0.1);
    color: #991B1B;
}

/* --------------------------------------------------------------------------
   Tab component (within lesson text)
   -------------------------------------------------------------------------- */

.lesson-text .lesson-tabs {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin: var(--space-lg) 0;
    overflow: hidden;
}
.lesson-text .tab-buttons {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-surface-alt);
    overflow-x: auto;
}
.lesson-text .tab-btn {
    padding: var(--space-sm) var(--space-md);
    border: none;
    background: none;
    cursor: pointer;
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
    white-space: nowrap;
}
.lesson-text .tab-btn:hover { color: var(--text-primary); }
.lesson-text .tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    background: var(--bg-surface);
}
.lesson-text .tab-content {
    display: none;
    padding: var(--space-md);
}
.lesson-text .tab-content.active { display: block; }

/* --------------------------------------------------------------------------
   Dark mode overrides — lesson content boxes
   -------------------------------------------------------------------------- */

[data-theme="dark"] .lesson-text .lesson-tip { background: rgba(16, 185, 129, 0.12); border-color: #34D399; }
[data-theme="dark"] .lesson-text .lesson-warning { background: rgba(245, 158, 11, 0.12); border-color: #FBBF24; }
[data-theme="dark"] .lesson-text .lesson-info { background: rgba(59, 130, 246, 0.12); border-color: #60A5FA; }
[data-theme="dark"] .lesson-text .lesson-example { background: rgba(139, 92, 246, 0.12); border-color: #A78BFA; }
[data-theme="dark"] .lesson-text .lesson-takeaway { background: rgba(37, 99, 235, 0.1); border-color: #60A5FA; }
[data-theme="dark"] .lesson-text .lesson-quote { border-color: #94A3B8; }
[data-theme="dark"] .lesson-text .lesson-quote::before { color: #64748B; }
[data-theme="dark"] .lesson-text .lesson-code { background: #0F172A; }

[data-theme="dark"] .lesson-text .lesson-comparison .before { background: rgba(239, 68, 68, 0.1); border-color: #F87171; }
[data-theme="dark"] .lesson-text .lesson-comparison .after { background: rgba(16, 185, 129, 0.1); border-color: #34D399; }

[data-theme="dark"] .lesson-text details { border-color: var(--border-color); }
[data-theme="dark"] .lesson-text details summary { background: rgba(255, 255, 255, 0.05); }
[data-theme="dark"] .lesson-text details summary:hover { background: rgba(37, 99, 235, 0.1); }

[data-theme="dark"] .lesson-text .lesson-check { border-color: var(--border-color); background: var(--bg-surface); }
[data-theme="dark"] .lesson-text .check-options button { background: var(--bg-surface); border-color: var(--border-color); color: var(--text-primary); }
[data-theme="dark"] .lesson-text .check-options button.correct { background: rgba(16, 185, 129, 0.15); color: #6EE7B7; border-color: #34D399; }
[data-theme="dark"] .lesson-text .check-options button.wrong { background: rgba(239, 68, 68, 0.15); color: #FCA5A5; border-color: #F87171; }
[data-theme="dark"] .lesson-text .check-feedback.correct { background: rgba(16, 185, 129, 0.15); color: #6EE7B7; }
[data-theme="dark"] .lesson-text .check-feedback.wrong { background: rgba(239, 68, 68, 0.15); color: #FCA5A5; }

[data-theme="dark"] .lesson-text .lesson-tabs { border-color: var(--border-color); }
[data-theme="dark"] .lesson-text .tab-buttons { background: rgba(255, 255, 255, 0.05); border-color: var(--border-color); }
[data-theme="dark"] .lesson-text .tab-btn { color: var(--text-secondary); }
[data-theme="dark"] .lesson-text .tab-btn.active { color: #60A5FA; border-bottom-color: #60A5FA; background: var(--bg-surface); }

/* --------------------------------------------------------------------------
   Responsive — lesson content boxes
   -------------------------------------------------------------------------- */

@media (max-width: 640px) {
    .lesson-text .lesson-comparison { flex-direction: column; }
    .lesson-text .lesson-tip,
    .lesson-text .lesson-warning,
    .lesson-text .lesson-info,
    .lesson-text .lesson-example,
    .lesson-text .lesson-takeaway,
    .lesson-text .lesson-quote {
        padding-left: calc(var(--space-md) + 1.5rem);
        padding-right: var(--space-md);
    }
    .lesson-text .lesson-check { padding: var(--space-md); }
    .lesson-text .tab-btn { padding: var(--space-xs) var(--space-sm); font-size: 0.8rem; }
}

/* --------------------------------------------------------------------------
   Lesson actions + navigation
   -------------------------------------------------------------------------- */

.lesson-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.lesson-nav {
    display: flex;
    gap: var(--space-sm);
}

/* --------------------------------------------------------------------------
   Notes sidebar
   -------------------------------------------------------------------------- */

.notes-sidebar {
    width: 280px;
    flex-shrink: 0;
    background: var(--bg-surface);
    border-left: 1px solid var(--border-color);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: var(--header-height);
    height: calc(100vh - var(--header-height));
}

.notes-sidebar h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.notes-textarea {
    flex: 1;
    resize: none;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--space-sm);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: var(--line-height);
}

.notes-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.notes-status {
    font-size: var(--font-size-xs);
    height: 20px;
    line-height: 20px;
    margin-top: var(--space-xs);
}

.notes-status-saved {
    color: var(--color-success);
}

.notes-status-error {
    color: var(--color-error);
}

/* --------------------------------------------------------------------------
   Dashboard notes list
   -------------------------------------------------------------------------- */

.notes-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.note-item {
    display: block;
    padding: var(--space-md);
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-primary);
    transition: background var(--transition-fast);
}

.note-item:hover {
    background: var(--bg-surface-alt);
}

.note-item-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.note-item-header strong {
    font-size: var(--font-size-sm);
}

.note-item-header span {
    font-size: var(--font-size-xs);
}

.note-item-preview {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.note-item-date {
    font-size: var(--font-size-xs);
}

/* --------------------------------------------------------------------------
   Course system — Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1023px) {
    .lesson-sidebar,
    .notes-sidebar {
        display: none;
    }

    .lesson-layout {
        margin: 0;
    }

    .lesson-main {
        padding: var(--space-md);
    }

    .course-header {
        grid-template-columns: 1fr;
    }

    .course-header-image {
        order: -1;
    }
}

@media (max-width: 639px) {
    .catalog-filters {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group select {
        min-width: 100%;
    }

    .lesson-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .lesson-nav {
        justify-content: space-between;
    }

    .course-header-content h1 {
        font-size: var(--font-size-2xl);
    }

    .note-item-header {
        flex-direction: column;
    }
}

/* ==========================================================================
   Phase 4: Payment, Checkout, Voucher, Invoice, Bundle
   ========================================================================== */

/* Checkout Box */
.checkout-box {
    margin-top: var(--space-md);
}

.checkout-price-display {
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.checkout-current-price {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
}

.checkout-original-price {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    text-decoration: line-through;
}

.tax-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 400;
}

.checkout-terms-notice {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-align: center;
    margin: var(--space-sm) 0;
}
.checkout-terms-notice a {
    color: var(--color-primary);
    text-decoration: underline;
}
.checkout-error {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--space-xs);
}

.btn-full {
    width: 100%;
    text-align: center;
}

/* Voucher Field */
.voucher-field {
    margin-bottom: var(--space-md);
}

.voucher-input-row {
    display: flex;
    gap: var(--space-xs);
}

.form-input {
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-body);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9375rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.voucher-input-row .form-input {
    flex: 1;
    min-width: 0;
}

.voucher-message {
    font-size: var(--font-size-sm);
    margin-top: var(--space-xs);
    min-height: 1.4em;
}

.voucher-success {
    color: var(--color-success);
}

.voucher-error {
    color: var(--color-error);
}

/* Payment Result Pages */
.payment-result-page {
    text-align: center;
    padding: var(--space-3xl) 0;
    padding-bottom: 250px;
}

.payment-result-page .container {
    max-width: 520px;
}

.payment-result-page h1 {
    margin: var(--space-lg) 0 var(--space-sm);
}

.payment-result-page p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
}

.payment-result-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.payment-result-success {
    color: var(--color-success);
}

.payment-result-cancel {
    color: var(--color-error);
}

.payment-result-actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* Mock Checkout */
.mock-checkout {
    max-width: 400px;
    margin: 0 auto;
    padding: var(--space-xl);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    text-align: center;
}

.mock-badge {
    display: inline-block;
    padding: 2px 12px;
    background: #f59e0b;
    color: #fff;
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
}

.mock-checkout h1 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-xs);
}

.mock-checkout-details {
    margin: var(--space-lg) 0;
    text-align: left;
}

.mock-checkout-row {
    display: flex;
    justify-content: space-between;
    padding: var(--space-xs) 0;
    border-bottom: 1px solid var(--color-border);
}

.mock-discount {
    color: var(--color-success);
}

.mock-total {
    font-weight: 700;
    font-size: var(--font-size-lg);
    border-bottom: none;
    border-top: 2px solid var(--color-border);
}

/* Invoice List (Dashboard) */
.invoice-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.invoice-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.invoice-item-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.invoice-item-amount {
    font-weight: 700;
    white-space: nowrap;
}

/* Bundle Page */
.bundle-hero {
    text-align: center;
    padding: var(--space-3xl) 0 var(--space-xl);
}

.bundle-hero .voucher-field {
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.bundle-hero h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-sm);
}

.bundle-desc {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    max-width: 600px;
    margin: 0 auto var(--space-lg);
}

.bundle-pricing {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.bundle-price {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
}

.bundle-original-price {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    text-decoration: line-through;
}

.bundle-savings {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-success);
    background: rgba(16, 185, 129, 0.1);
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

/* Bundle Banner (Catalog) */
.bundle-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
    padding: var(--space-lg) var(--space-xl);
    background: linear-gradient(135deg, var(--color-primary), #7c3aed);
    color: #fff;
    border-radius: var(--radius-lg);
}

.bundle-banner h3 {
    margin: 0 0 var(--space-xs);
    color: #fff;
}

.bundle-banner p {
    margin: 0;
    color: #f2f2f2;
}

.bundle-banner-price {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    white-space: nowrap;
}

.bundle-banner-price span {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.bundle-banner .btn {
    background: #fff;
    color: var(--color-primary);
}

.bundle-banner .btn:hover {
    background: rgba(255, 255, 255, 0.9);
}

/* Responsive: Payment/Checkout */
@media (max-width: 639px) {
    .payment-result-actions {
        flex-direction: column;
    }

    .bundle-banner {
        flex-direction: column;
        text-align: center;
    }

    .bundle-banner-price {
        flex-direction: column;
    }

    .bundle-pricing {
        flex-direction: column;
        align-items: center;
    }

    .invoice-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .voucher-input-row {
        flex-direction: column;
    }

    .mock-checkout {
        margin: 0 var(--space-sm);
    }
}

/* Dark Mode: Payment/Checkout additions */
[data-theme="dark"] .mock-checkout {
    background: var(--color-surface);
    border-color: var(--color-border);
}

[data-theme="dark"] .bundle-banner {
    background: linear-gradient(135deg, #6366f1, #7c3aed);
}

[data-theme="dark"] .bundle-savings {
    background: rgba(16, 185, 129, 0.15);
}

[data-theme="dark"] .invoice-item {
    background: var(--color-surface);
    border-color: var(--color-border);
}

/* ============================================================
   Quiz / Exam
   ============================================================ */

.quiz-page { max-width: 800px; margin: 0 auto; }

.quiz-header { text-align: center; margin-bottom: var(--space-xl); }
.quiz-header h1 { margin-bottom: var(--space-xs); }
.quiz-course-name { font-size: 1.1rem; color: var(--color-primary); font-weight: 600; margin-bottom: var(--space-sm); }

/* Timer bar */
.quiz-timer-bar {
    position: sticky; top: 0; z-index: 50;
    background: var(--color-bg); padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--color-border); margin-bottom: var(--space-xl);
}
.quiz-timer-label { display: flex; justify-content: space-between; font-size: 0.875rem; margin-bottom: 6px; }
.quiz-timer-label span:last-child { font-weight: 700; font-variant-numeric: tabular-nums; }
.quiz-timer-progress { height: 6px; background: var(--color-border); border-radius: 3px; overflow: hidden; }
.quiz-timer-fill { height: 100%; background: var(--color-primary); border-radius: 3px; transition: width 1s linear; }
.quiz-timer-fill.timer-warning { background: #f59e0b; }
.quiz-timer-fill.timer-critical { background: var(--color-danger); animation: pulse-timer 1s infinite; }
@keyframes pulse-timer { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }
.quiz-progress-label { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 4px; }

/* Questions */
.quiz-questions { display: flex; flex-direction: column; gap: var(--space-xl); }
.quiz-question {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--border-radius); padding: var(--space-lg);
}
.quiz-question-header { margin-bottom: var(--space-sm); }
.quiz-question-number { font-size: 0.8rem; color: var(--color-primary); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; display: block; margin-bottom: var(--space-sm); }
.quiz-question-text { font-size: 1.05rem; font-weight: 500; margin-bottom: var(--space-md); line-height: 1.5; display: block; }

/* Options */
.quiz-options { display: flex; flex-direction: column; gap: var(--space-sm); }
.quiz-option {
    display: flex; align-items: flex-start; gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--color-border); border-radius: var(--radius);
    cursor: pointer; transition: border-color 0.2s, background 0.2s;
}
.quiz-option:hover { border-color: var(--color-primary); background: rgba(79, 70, 229, 0.04); }
.quiz-option:has(.quiz-radio:checked) { border-color: var(--color-primary); background: rgba(79, 70, 229, 0.08); }
.quiz-radio { margin-top: 3px; accent-color: var(--color-primary); }
.quiz-option-text { flex: 1; line-height: 1.5; }

/* Actions */
.quiz-actions { display: flex; gap: var(--space-md); justify-content: center; margin-top: var(--space-xl); }

/* ============================================================
   Quiz Result
   ============================================================ */

.quiz-result-page { max-width: 800px; margin: 0 auto; }

.quiz-result-header { text-align: center; margin-bottom: var(--space-xl); padding: var(--space-xl) 0; }
.quiz-result-icon { margin-bottom: var(--space-md); }
.quiz-result-header h1 { margin-bottom: var(--space-xs); }

/* Score card */
.quiz-score-card {
    text-align: center; background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: var(--space-lg); margin-bottom: var(--space-lg);
}
.quiz-score-label { font-size: 0.875rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: var(--space-xs); }
.quiz-score-value { font-size: 3rem; font-weight: 700; }
.quiz-score-value.score-passed { color: var(--color-success); }
.quiz-score-value.score-failed { color: var(--color-danger); }

/* Result actions */
.quiz-result-actions { display: flex; gap: var(--space-md); justify-content: center; margin-bottom: var(--space-xl); flex-wrap: wrap; }

/* Detail results */
.quiz-detail-results h2 { margin-bottom: var(--space-lg); }
.quiz-result-item {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: var(--space-lg); margin-bottom: var(--space-md);
    border-left: 4px solid var(--color-border);
}
.quiz-result-item.result-correct { border-left-color: var(--color-success); }
.quiz-result-item.result-wrong { border-left-color: var(--color-danger); }

.quiz-result-item-header { display: flex; align-items: center; gap: var(--space-sm); margin-bottom: var(--space-sm); }
.quiz-result-item-number {
    width: 28px; height: 28px; border-radius: 50%; background: var(--color-border);
    display: flex; align-items: center; justify-content: center; font-size: 0.8rem; font-weight: 700;
}
.quiz-result-item-question { font-weight: 500; margin-bottom: var(--space-md); line-height: 1.5; }

.quiz-result-answers { display: flex; flex-direction: column; gap: var(--space-xs); margin-bottom: var(--space-sm); }
.quiz-result-answer { padding: var(--space-xs) var(--space-sm); border-radius: 4px; font-size: 0.9rem; }
.quiz-result-answer.answer-correct { background: rgba(16, 185, 129, 0.1); color: var(--color-success); }
.quiz-result-answer.answer-wrong { background: rgba(239, 68, 68, 0.1); color: var(--color-danger); }
.answer-label { font-weight: 600; margin-right: var(--space-xs); }

.quiz-result-explanation {
    margin-top: var(--space-sm); padding: var(--space-sm) var(--space-md);
    background: rgba(79, 70, 229, 0.05); border-radius: 4px; font-size: 0.9rem;
}
.quiz-result-explanation p { margin: var(--space-xs) 0 0; }

/* ============================================================
   Course Exam Section
   ============================================================ */

.course-exam-section {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: var(--space-lg);
}
.course-exam-section h2 { margin-bottom: var(--space-md); }

.exam-status {
    display: flex; align-items: flex-start; gap: var(--space-md);
    padding: var(--space-md); border-radius: var(--radius);
}
.exam-status-icon { flex-shrink: 0; margin-top: 2px; }
.exam-status strong { display: block; margin-bottom: 4px; }
.exam-status p { margin: 0; font-size: 0.9rem; color: var(--color-text-muted); }

.exam-passed { background: rgba(16, 185, 129, 0.08); }
.exam-locked { background: rgba(107, 114, 128, 0.08); }
.exam-actions { display: flex; gap: var(--space-sm); flex-wrap: wrap; }

/* ============================================================
   Certificate list (dashboard)
   ============================================================ */

.certificate-list { display: flex; flex-direction: column; gap: var(--space-sm); }
.certificate-item {
    display: flex; align-items: center; gap: var(--space-md);
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: var(--space-md);
}
.certificate-item-icon { flex-shrink: 0; }
.certificate-item-info { flex: 1; }
.certificate-item-info strong { display: block; }
.certificate-item-info .text-muted { font-size: 0.85rem; }

/* ============================================================
   Dark mode overrides for quiz
   ============================================================ */

[data-theme="dark"] .quiz-timer-bar { background: var(--color-bg); border-color: var(--color-border); }
[data-theme="dark"] .quiz-question { background: var(--color-surface); }
[data-theme="dark"] .quiz-option:hover { background: rgba(79, 70, 229, 0.1); }
[data-theme="dark"] .quiz-option:has(.quiz-radio:checked) { background: rgba(79, 70, 229, 0.15); }
[data-theme="dark"] .quiz-score-card { background: var(--color-surface); }
[data-theme="dark"] .quiz-result-item { background: var(--color-surface); }
[data-theme="dark"] .course-exam-section { background: var(--color-surface); }
[data-theme="dark"] .certificate-item { background: var(--color-surface); border-color: var(--color-border); }
[data-theme="dark"] .exam-passed { background: rgba(16, 185, 129, 0.12); }
[data-theme="dark"] .exam-locked { background: rgba(107, 114, 128, 0.12); }

/* ============================================================
   Responsive quiz
   ============================================================ */

@media (max-width: 640px) {
    .quiz-actions { flex-direction: column; }
    .quiz-result-actions { flex-direction: column; align-items: center; }
    .exam-actions { flex-direction: column; }
    .certificate-item { flex-direction: column; text-align: center; }
}

/* ==========================================================================
   Contact Form
   ========================================================================== */

.contact-page { max-width: 640px; margin: 0 auto; padding: var(--sp-xl) 0; }
.contact-intro { color: var(--color-muted); margin-bottom: var(--sp-lg); }

.contact-form .form-group { margin-bottom: var(--sp-md); }
.contact-form label { display: block; font-weight: 600; margin-bottom: var(--sp-xs); }
.contact-form .required { color: var(--color-danger, #ef4444); }
.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
    width: 100%;
    padding: var(--sp-sm) var(--sp-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}
.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}
.contact-form .has-error input,
.contact-form .has-error textarea {
    border-color: var(--color-danger, #ef4444);
}

/* Honeypot — invisible to real users */
.hp-field { position: absolute; left: -9999px; height: 0; overflow: hidden; }

/* Captcha */
.captcha-group { margin-bottom: var(--sp-lg); }
.captcha-display {
    display: inline-block;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.26rem;
    font-weight: 700;
    letter-spacing: 0.35rem;
    padding: var(--sp-xs) var(--sp-md);
    background: var(--color-surface);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--sp-xs);
    user-select: none;
}
.captcha-hint {
    font-size: 0.875rem;
    color: var(--color-muted);
    margin-bottom: var(--sp-sm);
}
.captcha-group input { max-width: 200px; text-transform: uppercase; }

/* Affiliate Application Page */
.affiliate-page { max-width: 800px; margin: 0 auto; padding: var(--sp-xl) 0; }
.affiliate-header { text-align: center; margin-bottom: var(--sp-xl); }
.affiliate-intro { color: var(--color-muted); max-width: 600px; margin: var(--sp-sm) auto 0; }

.affiliate-benefits {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-lg);
    margin-bottom: var(--sp-2xl);
}
.affiliate-benefit-card {
    text-align: center;
    padding: var(--sp-lg);
    background: var(--bg-surface);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: box-shadow var(--transition-normal), border-color var(--transition-normal);
}
.affiliate-benefit-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}
.affiliate-benefit-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--sp-md);
    color: var(--color-primary);
}
.affiliate-benefit-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--sp-xs);
}
.affiliate-benefit-card p {
    font-size: var(--font-size-sm);
    color: var(--color-muted);
    margin-bottom: 0;
}

.affiliate-form-section { max-width: 640px; margin: 0 auto; padding-top: var(--sp-xl); }
.affiliate-form-section h2 { margin-bottom: var(--sp-lg); }

@media (max-width: 768px) {
    .affiliate-benefits { grid-template-columns: 1fr; }
    .affiliate-page { padding: var(--sp-lg) 0; }
}

/* ==========================================================================
   Protected Contact (email/phone obfuscation)
   ========================================================================== */

.protected-contact .d { display: none !important; }
.protected-contact a { color: var(--color-primary); text-decoration: underline; }

/* ==========================================================================
   FAQ Page — Accordion
   ========================================================================== */

.faq-page { max-width: 800px; margin: 0 auto; padding: var(--sp-xl) 0; }
.faq-subtitle { color: var(--color-muted); margin-bottom: var(--sp-xl); }
.faq-category-title {
    font-size: 1.25rem;
    margin: var(--sp-lg) 0 var(--sp-sm);
    padding-bottom: var(--sp-xs);
    border-bottom: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.faq-accordion { margin-bottom: var(--sp-lg); }

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--sp-xs);
    overflow: hidden;
    transition: box-shadow 0.2s;
}
.faq-item[open] {
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.faq-question {
    cursor: pointer;
    padding: var(--sp-md);
    font-weight: 600;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-sm);
    user-select: none;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
    content: '+';
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    transition: transform 0.2s;
    flex-shrink: 0;
}
.faq-item[open] .faq-question::after {
    content: '\2212'; /* minus */
    transform: rotate(180deg);
}
.faq-question:hover { background: rgba(79, 70, 229, 0.04); }

.faq-answer {
    padding: 0 var(--sp-md) var(--sp-md);
    color: var(--color-muted);
    line-height: 1.7;
}
.faq-answer p { margin-bottom: var(--sp-sm); }
.faq-answer p:last-child { margin-bottom: 0; }

/* ==========================================================================
   Search Page
   ========================================================================== */

.search-page { max-width: 800px; margin: 0 auto; padding: var(--sp-xl) 0; }

.search-form { margin-bottom: var(--sp-lg); }
.search-input-wrap {
    display: flex;
    gap: var(--sp-sm);
}
.search-input-wrap input[type="search"] {
    flex: 1;
    padding: var(--sp-sm) var(--sp-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    background: var(--color-surface);
    color: var(--color-text);
    font-family: inherit;
}
.search-input-wrap input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}
.search-hint { color: var(--color-muted); }
.search-no-results { color: var(--color-muted); font-style: italic; }
.search-count { color: var(--color-muted); margin-bottom: var(--sp-lg); }

.search-result-group { margin-bottom: var(--sp-xl); }
.search-group-title {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: var(--sp-sm);
    padding-bottom: var(--sp-xs);
    border-bottom: 1px solid var(--color-border);
}

.search-result-item {
    display: block;
    padding: var(--sp-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--color-text);
    transition: background 0.15s;
    margin-bottom: var(--sp-xs);
}
.search-result-item:hover { background: rgba(79, 70, 229, 0.04); }
.search-result-item h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--sp-xs);
    color: var(--color-text);
}
.search-excerpt {
    font-size: 0.875rem;
    color: var(--color-muted);
    line-height: 1.5;
}
.search-excerpt mark {
    background: rgba(250, 204, 21, 0.3);
    color: inherit;
    padding: 0 2px;
    border-radius: 2px;
}

/* ==========================================================================
   Static pages (imprint, privacy, terms)
   ========================================================================== */

.static-page { max-width: 800px; margin: 0 auto; padding: var(--sp-xl) 0; }
.static-page--agb { padding-bottom: 250px; }
.page-content { line-height: 1.8; }
.page-content h2 { margin-top: var(--sp-xl); margin-bottom: var(--sp-sm); }
.page-content h3 { margin-top: var(--sp-lg); margin-bottom: var(--sp-xs); }
.page-content p { margin-bottom: var(--sp-md); }
.page-content ul, .page-content ol { margin-bottom: var(--sp-md); padding-left: var(--sp-lg); }
.page-content li { margin-bottom: var(--sp-xs); }
.page-content a { color: var(--color-primary); text-decoration: underline; }
.page-content table { width: 100%; border-collapse: collapse; margin-bottom: var(--sp-md); font-size: 0.9rem; }
.page-content th,
.page-content td { padding: var(--sp-sm) var(--sp-md); border: 1px solid var(--color-border); text-align: left; }
.page-content th { background: var(--bg-surface-alt); font-weight: 600; }
.page-content code { background: var(--bg-surface-alt); padding: 0.15em 0.4em; border-radius: var(--border-radius-sm); font-size: 0.85em; }

.static-content-infobox {
    background: var(--bg-surface-alt);
    border-left: 4px solid var(--color-primary);
    padding: var(--sp-md) var(--sp-lg);
    margin-bottom: var(--sp-xl);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--color-text-muted);
}

/* ==========================================================================
   Dark mode overrides for contact, faq, search, pages
   ========================================================================== */

[data-theme="dark"] .captcha-display { background: var(--color-bg); border-color: var(--color-border); }
[data-theme="dark"] .faq-item { border-color: var(--color-border); }
[data-theme="dark"] .faq-item[open] { box-shadow: 0 2px 8px rgba(0,0,0,0.3); }
[data-theme="dark"] .faq-question:hover { background: rgba(79, 70, 229, 0.1); }
[data-theme="dark"] .search-result-item:hover { background: rgba(79, 70, 229, 0.1); }
[data-theme="dark"] .search-excerpt mark { background: rgba(250, 204, 21, 0.2); }

/* ==========================================================================
   Responsive: contact, faq, search
   ========================================================================== */

@media (max-width: 640px) {
    .search-input-wrap { flex-direction: column; }
    .contact-page, .faq-page, .search-page, .static-page { padding: var(--sp-lg) 0; }
}

/* ==========================================================================
   Announcement Banner
   ========================================================================== */

.announcement-banner {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark, #1d4ed8));
    color: #fff;
    padding: var(--sp-sm) 0;
    position: relative;
    z-index: 10;
    overflow: hidden;
}

.announcement-banner::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    animation: announcement-shimmer 4s ease-in-out infinite;
    pointer-events: none;
}

@keyframes announcement-shimmer {
    0%, 100% { left: -100%; }
    50% { left: 100%; }
}

.announcement-banner-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--sp-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-sm);
    text-align: center;
}

.announcement-banner-content {
    display: flex;
    align-items: center;
    gap: var(--sp-xs);
    flex-wrap: wrap;
    justify-content: center;
}

.announcement-banner-title {
    font-weight: 700;
    font-size: 0.9rem;
    color: #fde047;
}

.announcement-banner-text {
    font-size: 0.875rem;
    color: #fde047;
}

.announcement-banner-link {
    color: #fde047;
    text-decoration: underline;
    text-underline-offset: 2px;
    font-weight: 600;
    font-size: 0.875rem;
    white-space: nowrap;
}

.announcement-banner-link:hover {
    opacity: 0.85;
}

.announcement-banner-close {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: var(--sp-xs);
    margin-left: var(--sp-md);
    line-height: 1;
    opacity: 0.8;
    transition: opacity 0.2s;
    flex-shrink: 0;
}
.announcement-banner-close svg {
    width: 22px;
    height: 22px;
}

.announcement-banner-close:hover {
    opacity: 1;
}

/* ==========================================================================
   Promo Banner
   ========================================================================== */

.promo-banner {
    background: linear-gradient(135deg, #7c3aed, #2563eb);
    color: #fff;
    padding: var(--sp-lg) var(--sp-md);
    margin-bottom: var(--sp-xl);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
    z-index: 3;
}

/* Overlap into hero like USP cards */
.hero--with-bg + .promo-banner {
    margin-top: -80px;
}

.promo-banner-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--sp-md);
    text-align: center;
    position: relative;
    z-index: 1;
}

.promo-banner-text {
    font-size: 1.125rem;
    margin-bottom: var(--sp-md);
    color: #fff;
}

.promo-banner-code-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-sm);
    flex-wrap: wrap;
}

.promo-banner-code {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-sm);
    background: rgba(255,255,255,0.15);
    border: 2px dashed rgba(255,255,255,0.5);
    border-radius: var(--radius-md);
    padding: var(--sp-xs) var(--sp-md);
    font-family: monospace;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    user-select: all;
}

.promo-banner-copy {
    background: transparent;
    color: rgba(255,255,255,0.7);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: var(--radius-sm);
    padding: var(--sp-xs) var(--sp-sm);
    font-weight: 400;
    font-size: 0.75rem;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
}

.promo-banner-copy:hover {
    color: #fff;
    border-color: rgba(255,255,255,0.6);
}

.promo-banner-copy:active {
    transform: scale(0.95);
}

.promo-banner-close {
    position: absolute;
    top: var(--sp-sm);
    right: var(--sp-sm);
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: var(--sp-xs);
    line-height: 1;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.promo-banner-close:hover {
    opacity: 1;
}

.promo-countdown {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-sm);
    margin-top: var(--sp-md);
}

.promo-countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255,255,255,0.15);
    border-radius: var(--radius-sm);
    padding: var(--sp-xs) var(--sp-sm);
    min-width: 56px;
}

.promo-countdown-number {
    font-family: monospace;
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.2;
}

.promo-countdown-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    opacity: 0.8;
    letter-spacing: 0.05em;
}

.promo-banner-expires-soon {
    font-size: 0.8rem;
    margin-top: var(--sp-xs);
    font-weight: 600;
    color: #ffffff;
}

@media (max-width: 640px) {
    .announcement-banner-inner {
        flex-direction: column;
        gap: var(--sp-xs);
    }
    .announcement-banner-close {
        position: absolute;
        top: var(--sp-xs);
        right: var(--sp-xs);
    }
    .promo-banner-code {
        font-size: 1rem;
        padding: var(--sp-xs) var(--sp-sm);
    }
    .promo-countdown-item {
        min-width: 44px;
        padding: var(--sp-xs);
    }
    .promo-countdown-number {
        font-size: 1.2rem;
    }
}

/* ==========================================================================
   Cookie Consent Banner
   ========================================================================== */

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    background: var(--color-bg);
    border-top: 2px solid var(--color-primary);
    box-shadow: 0 -4px 24px rgba(0,0,0,0.15);
    padding: var(--sp-lg) var(--sp-xl);
}
.cookie-banner-inner {
    max-width: 900px;
    margin: 0 auto;
}
.cookie-banner h3 {
    font-size: 1.125rem;
    margin-bottom: var(--sp-xs);
}
.cookie-banner-text {
    font-size: 0.9rem;
    color: var(--color-muted);
    margin-bottom: var(--sp-md);
}
.cookie-categories {
    display: flex;
    flex-direction: column;
    gap: var(--sp-sm);
    margin-bottom: var(--sp-md);
}
.cookie-category {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-card-bg, var(--color-bg));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--sp-sm) var(--sp-md);
}
.cookie-category-info {
    flex: 1;
}
.cookie-category-name {
    font-weight: 600;
    font-size: 0.9rem;
}
.cookie-category-desc {
    font-size: 0.8rem;
    color: var(--color-muted);
}
.cookie-toggle {
    position: relative;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
    margin-left: var(--sp-md);
}
.cookie-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}
.cookie-toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--color-border);
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.2s;
}
.cookie-toggle-slider::before {
    content: '';
    position: absolute;
    left: 2px;
    top: 2px;
    width: 20px;
    height: 20px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s;
}
.cookie-toggle input:checked + .cookie-toggle-slider {
    background: var(--color-primary);
}
.cookie-toggle input:checked + .cookie-toggle-slider::before {
    transform: translateX(20px);
}
.cookie-toggle input:disabled + .cookie-toggle-slider {
    opacity: 0.6;
    cursor: not-allowed;
}
.cookie-banner-actions {
    display: flex;
    gap: var(--sp-sm);
    flex-wrap: wrap;
}
.cookie-banner-actions .btn {
    font-size: 0.85rem;
    padding: 0.5em 1.2em;
}
@media (max-width: 640px) {
    .cookie-banner { padding: var(--sp-md); }
    .cookie-banner-actions { flex-direction: column; }
    .cookie-banner-actions .btn { width: 100%; text-align: center; }
}