/* ============================================================================
   Socrates Homeschool Platform - Comprehensive UI/UX Design

   DESIGN PHILOSOPHY:
   - Classical education heritage meets modern digital experience
   - Scholarly authority balanced with approachable youth engagement
   - Trust for parents, excitement for students
   - Timeless wisdom presented through contemporary design

   COLOR PALETTE RATIONALE:
   --primary (Deep Oxford Blue): Authority, wisdom, classical education
   --primary-dark (Navy): Depth, seriousness, academic tradition
   --accent-gold (Refined Gold): Classical touch, achievement, excellence
   --accent-terracotta (Warm Clay): Ancient Greece, warmth, accessibility
   --sage (Muted Green): Growth, balance, classical library
   --parchment (Warm Cream): Historical documents, classical texts
   --slate (Cool Gray): Modern sophistication, readability

   TYPOGRAPHY STRATEGY:
   - Headings: Crimson Text (Classical serif with scholarly gravitas)
   - Body: Inter (Modern sans-serif with excellent readability)
   - Balance: Tradition in headings, clarity in content
   ============================================================================ */

/* ============================================================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================================================ */

:root {
    /* Color Palette - Classical Education with Modern Refinement */
    --primary: #1e3a5f;              /* Deep Oxford Blue - Authority & Wisdom */
    --primary-dark: #0f1e3a;         /* Navy - Academic Depth */
    --primary-light: #2c5282;        /* Lighter Blue - Hover States */
    --primary-subtle: #edf2f7;       /* Pale Blue - Backgrounds */

    --accent-gold: #d4a574;          /* Refined Gold - Classical Excellence */
    --accent-gold-dark: #b8935f;     /* Darker Gold - Hover */
    --accent-terracotta: #d67654;    /* Warm Terracotta - Ancient Greece */
    --accent-sage: #7a9b76;          /* Muted Sage - Classical Library */

    --parchment: #faf8f3;            /* Warm Cream - Historical Documents */
    --parchment-light: #fefdfb;      /* Lightest Parchment */

    /* Neutral Colors */
    --slate-900: #0f172a;            /* Darkest - Primary Text */
    --slate-800: #1e293b;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-500: #64748b;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    --slate-100: #f1f5f9;
    --slate-50: #f8fafc;

    /* Semantic Colors */
    --success: #22c55e;
    --success-light: #dcfce7;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;

    /* Typography */
    --font-serif: 'Crimson Text', 'Georgia', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing System */
    --spacing-xs: 0.25rem;    /* 4px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 1rem;       /* 16px */
    --spacing-lg: 1.5rem;     /* 24px */
    --spacing-xl: 2rem;       /* 32px */
    --spacing-2xl: 3rem;      /* 48px */
    --spacing-3xl: 4rem;      /* 64px */
    --spacing-4xl: 6rem;      /* 96px */

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows - Subtle and Refined */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.12);
    --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.15);
    --shadow-xl: 0 12px 40px rgba(15, 23, 42, 0.2);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout */
    --container-max: 1200px;
    --container-reading: 720px;
}

/* ============================================================================
   RESET & BASE STYLES
   ============================================================================ */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-weight: var(--font-weight-normal);
    line-height: 1.65;
    color: var(--slate-800);
    background: var(--parchment);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
h2 { font-size: 2.25rem; letter-spacing: -0.01em; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.375rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--slate-700);
}

.lead {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--slate-600);
    font-weight: var(--font-weight-normal);
}

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

a:hover {
    color: var(--primary-light);
}

strong {
    font-weight: var(--font-weight-semibold);
    color: var(--slate-900);
}

/* ============================================================================
   LAYOUT & CONTAINERS
   ============================================================================ */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-reading {
    max-width: var(--container-reading);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.main-content {
    flex: 1;
}

/* ============================================================================
   NAVIGATION
   ============================================================================ */

.navbar {
    background: white;
    border-bottom: 1px solid var(--slate-200);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

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

.navbar-brand {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary);
    letter-spacing: -0.01em;
    transition: color var(--transition-fast);
}

.navbar-brand:hover {
    color: var(--accent-gold-dark);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--slate-600);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 0.9375rem;
}

.nav-link:hover {
    color: var(--primary);
    background: var(--primary-subtle);
}

.nav-user {
    color: var(--slate-500);
    font-size: 0.875rem;
    padding: 0 var(--spacing-sm);
}

.nav-logout-form {
    display: inline;
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1.5rem;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: var(--font-weight-semibold);
    line-height: 1.5;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    background: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    background: var(--primary-dark);
}

.btn-outline {
    background: white;
    border-color: var(--slate-300);
    color: var(--slate-700);
}

.btn-outline:hover {
    background: var(--slate-50);
    border-color: var(--slate-400);
}

.btn-accent {
    background: var(--accent-gold);
    color: var(--primary-dark);
    box-shadow: var(--shadow);
}

.btn-accent:hover {
    background: var(--accent-gold-dark);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background: var(--success);
    color: white;
    box-shadow: var(--shadow);
}

.btn-warning {
    background: var(--warning);
    color: white;
    box-shadow: var(--shadow);
}

.btn-danger {
    background: var(--danger);
    color: white;
    box-shadow: var(--shadow);
}

.btn-sm {
    padding: 0.375rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.0625rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn:disabled,
.btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* ============================================================================
   HOME PAGE - HERO SECTION
   ============================================================================ */

.hero {
    text-align: center;
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--parchment-light) 0%, var(--primary-subtle) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(30, 58, 95, 0.02) 2px, rgba(30, 58, 95, 0.02) 4px);
    pointer-events: none;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.15;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-dark);
    position: relative;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.375rem;
    line-height: 1.6;
    color: var(--slate-600);
    margin-bottom: var(--spacing-2xl);
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    position: relative;
}

/* ============================================================================
   SECTION STYLES
   ============================================================================ */

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

.section-subtitle {
    font-size: 1.125rem;
    color: var(--slate-600);
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--spacing-2xl);
}

/* Mission Section */
.mission {
    background: white;
    border-top: 3px solid var(--accent-gold);
    border-bottom: 1px solid var(--slate-200);
}

.mission-content {
    max-width: 820px;
    margin: 0 auto;
    text-align: center;
}

.mission h2 {
    font-size: 2.5rem;
    line-height: 1.3;
    margin-bottom: var(--spacing-xl);
    color: var(--primary);
}

.mission p {
    font-size: 1.125rem;
    line-height: 1.75;
    margin-bottom: var(--spacing-lg);
}

/* ============================================================================
   FEATURE CARDS
   ============================================================================ */

.features {
    background: var(--parchment);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.feature-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--slate-100);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-terracotta));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-subtle), var(--parchment));
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    color: var(--primary);
    font-size: 1.75rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.feature-card p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--slate-600);
    margin: 0;
}

/* ============================================================================
   HOW IT WORKS - PROCESS STEPS
   ============================================================================ */

.how-it-works {
    background: white;
    border-top: 1px solid var(--slate-200);
}

.how-it-works h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-3xl);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1100px;
    margin: 0 auto;
    position: relative;
}

.step {
    text-align: center;
    padding: var(--spacing-xl);
    position: relative;
}

.step-number {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    font-family: var(--font-serif);
    border-radius: var(--radius-full);
    margin: 0 auto var(--spacing-lg);
    box-shadow: var(--shadow-md);
    position: relative;
}

.step-number::after {
    content: '';
    position: absolute;
    width: 72px;
    height: 72px;
    border: 2px solid var(--accent-gold);
    border-radius: var(--radius-full);
    top: -4px;
    left: -4px;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.step:hover .step-number::after {
    opacity: 1;
}

.step h3 {
    font-size: 1.375rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
}

.step p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--slate-600);
    margin: 0;
}

/* ============================================================================
   POSITIONING SECTION
   ============================================================================ */

.positioning {
    background: var(--slate-50);
    border-top: 1px solid var(--slate-200);
}

.positioning h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-3xl);
}

.positioning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
    max-width: 960px;
    margin: 0 auto;
}

.positioning-column {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border-top: 4px solid var(--slate-300);
}

.positioning-column.is-not {
    border-top-color: var(--accent-terracotta);
}

.positioning-column.is {
    border-top-color: var(--accent-sage);
}

.positioning-column h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.positioning-column.is-not h3 {
    color: var(--accent-terracotta);
}

.positioning-column.is h3 {
    color: var(--accent-sage);
}

.positioning-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.positioning-column li {
    padding: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
    border-bottom: 1px solid var(--slate-100);
    position: relative;
    color: var(--slate-700);
    line-height: 1.6;
}

.positioning-column li:last-child {
    border-bottom: none;
}

.positioning-column.is-not li::before {
    content: '✗';
    position: absolute;
    left: 0;
    color: var(--accent-terracotta);
    font-weight: var(--font-weight-bold);
    font-size: 1.125rem;
}

.positioning-column.is li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-sage);
    font-weight: var(--font-weight-bold);
    font-size: 1.125rem;
}

/* ============================================================================
   AUDIENCE SECTION
   ============================================================================ */

.audience {
    background: white;
}

.audience h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

.audience > .lead {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1100px;
    margin: 0 auto;
}

.audience-card {
    background: var(--parchment-light);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--accent-gold);
    transition: all var(--transition-base);
}

.audience-card:hover {
    transform: translateX(4px);
    border-left-color: var(--primary);
    background: white;
    box-shadow: var(--shadow);
}

.audience-card p {
    margin: 0;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--slate-700);
}

/* ============================================================================
   TRUST SECTION
   ============================================================================ */

.trust {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: white;
    border-top: 4px solid var(--accent-gold);
}

.trust-content {
    max-width: 820px;
    margin: 0 auto;
    text-align: center;
}

.trust h2 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xl);
}

.trust blockquote {
    margin: var(--spacing-2xl) 0;
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--accent-gold);
}

.trust blockquote p {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-style: italic;
    color: white;
    margin-bottom: var(--spacing-md);
}

.trust blockquote cite {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-style: normal;
    color: var(--accent-gold);
}

.trust p {
    font-size: 1.125rem;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
}

/* ============================================================================
   FINAL CTA SECTION
   ============================================================================ */

.final-cta {
    background: var(--parchment-light);
    text-align: center;
    padding: var(--spacing-4xl) 0;
}

.cta-content {
    max-width: 720px;
    margin: 0 auto;
}

.final-cta h2 {
    font-size: 2.75rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-dark);
}

.final-cta > .cta-content > p {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--slate-600);
    margin-bottom: var(--spacing-2xl);
}

.cta-actions {
    margin-bottom: var(--spacing-lg);
}

.cta-note {
    font-size: 0.9375rem;
    color: var(--slate-500);
    font-style: italic;
    margin: 0;
}

/* ============================================================================
   FOOTER
   ============================================================================ */

.footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-2xl) 0;
    text-align: center;
    border-top: 3px solid var(--accent-gold);
}

.footer p {
    margin: 0;
    color: rgba(255, 255, 255, 0.7);
}

/* ============================================================================
   FORMS
   ============================================================================ */

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--slate-700);
    font-size: 0.9375rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.625rem 1rem;
    border: 2px solid var(--slate-200);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
    background: white;
}

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

.form-hint {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--slate-500);
}

.form-error {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--danger);
    font-weight: var(--font-weight-medium);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-label input {
    width: auto;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.form-container {
    max-width: 500px;
}

.form-wide {
    max-width: 800px;
}

.form-fieldset {
    border: 2px solid var(--slate-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.form-fieldset legend {
    font-weight: var(--font-weight-semibold);
    padding: 0 var(--spacing-md);
    color: var(--primary);
}

.fieldset-description {
    color: var(--slate-500);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-lg);
}

/* ============================================================================
   ALERTS & BADGES
   ============================================================================ */

.alert {
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
}

.alert-success {
    background: var(--success-light);
    color: #166534;
    border-left-color: var(--success);
}

.alert-error {
    background: var(--danger-light);
    color: #991b1b;
    border-left-color: var(--danger);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    background: var(--slate-200);
    color: var(--slate-700);
}

.badge-success {
    background: var(--success-light);
    color: #166534;
}

.badge-warning {
    background: var(--warning-light);
    color: #92400e;
}

.badge-danger {
    background: var(--danger-light);
    color: #991b1b;
}

.badge-subject {
    background: var(--primary);
    color: white;
}

.badge-lg {
    padding: 0.5rem 1rem;
    font-size: 0.9375rem;
}

/* ============================================================================
   CARDS
   ============================================================================ */

.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--slate-100);
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--slate-200);
    background: var(--slate-50);
}

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

.card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--slate-200);
    background: var(--slate-50);
}

/* ============================================================================
   TABLES
   ============================================================================ */

.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.table th,
.table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid var(--slate-200);
}

.table th {
    background: var(--slate-50);
    font-weight: var(--font-weight-semibold);
    color: var(--slate-600);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.table tbody tr:hover {
    background: var(--slate-50);
}

.table-compact th,
.table-compact td {
    padding: var(--spacing-sm) var(--spacing-md);
}

/* ============================================================================
   DASHBOARD & PAGE HEADERS
   ============================================================================ */

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.page-header h1 {
    margin: 0;
}

.page-container {
    margin-bottom: var(--spacing-xl);
}

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

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    text-align: center;
    border-top: 4px solid var(--primary);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary);
    font-family: var(--font-serif);
}

.stat-label {
    color: var(--slate-500);
    font-size: 0.9375rem;
    margin-top: var(--spacing-sm);
}

.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ============================================================================
   STUDENT/COURSE CARDS
   ============================================================================ */

.student-cards,
.course-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.student-card .card-header,
.course-card .card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

/* ============================================================================
   PROGRESS BAR
   ============================================================================ */

.progress-container {
    margin: var(--spacing-md) 0;
}

.progress-bar {
    height: 10px;
    background: var(--slate-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    transition: width var(--transition-slow);
    border-radius: var(--radius-full);
}

.progress-container.large .progress-bar {
    height: 14px;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--slate-500);
    margin-top: var(--spacing-xs);
}

/* ============================================================================
   LESSON PAGES
   ============================================================================ */

.lesson-page {
    margin: calc(var(--spacing-xl) * -1) 0;
}

.lesson-header {
    background: white;
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--slate-200);
    margin-bottom: var(--spacing-xl);
}

.lesson-nav-top {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.lesson-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--spacing-xl);
    padding: 0 var(--spacing-lg);
}

.lesson-content {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.lesson-body h2 {
    color: var(--slate-700);
    margin-top: var(--spacing-2xl);
}

.lesson-body h3 {
    color: var(--slate-600);
    margin-top: var(--spacing-xl);
}

.lesson-body ul,
.lesson-body ol {
    padding-left: var(--spacing-xl);
}

.lesson-body blockquote {
    border-left: 4px solid var(--accent-gold);
    padding-left: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    color: var(--slate-600);
    background: var(--slate-50);
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-lg) var(--spacing-xl);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
}

.lesson-progress-actions {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--slate-200);
}

.lesson-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--slate-200);
}

/* ============================================================================
   AI CHAT
   ============================================================================ */

.lesson-sidebar {
    position: sticky;
    top: 90px;
    height: fit-content;
}

.ai-chat-panel {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    height: 600px;
    border: 1px solid var(--slate-200);
}

.chat-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--slate-200);
    background: var(--primary-dark);
    color: white;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.chat-header h3 {
    margin: 0;
    color: white;
    font-size: 1.25rem;
}

.chat-header p {
    margin: var(--spacing-xs) 0 0;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.chat-welcome {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    color: var(--slate-500);
}

.chat-message {
    margin-bottom: var(--spacing-lg);
    max-width: 85%;
}

.chat-message-student {
    margin-left: auto;
    text-align: right;
}

.chat-message-student .message-content {
    background: var(--primary);
    color: white;
    border-radius: var(--radius-md) var(--radius-md) 0 var(--radius-md);
}

.chat-message-ai .message-content {
    background: var(--slate-100);
    border-radius: var(--radius-md) var(--radius-md) var(--radius-md) 0;
}

.chat-message-system .message-content {
    background: var(--warning-light);
    border-radius: var(--radius-md);
    text-align: center;
    font-size: 0.875rem;
}

.message-sender {
    font-size: 0.8125rem;
    color: var(--slate-500);
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
}

.message-content {
    padding: var(--spacing-md) var(--spacing-lg);
    display: inline-block;
}

.message-time {
    font-size: 0.8125rem;
    color: var(--slate-400);
    margin-top: var(--spacing-xs);
}

.chat-input-form {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--slate-200);
    display: flex;
    gap: var(--spacing-sm);
}

.chat-input-form textarea {
    flex: 1;
    resize: none;
    border: 2px solid var(--slate-200);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

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

.chat-status {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    font-size: 0.875rem;
    text-align: center;
}

.chat-status.loading {
    color: var(--slate-500);
}

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

.chat-readonly {
    pointer-events: auto;
}

.chat-readonly .chat-input-form {
    display: none;
}

/* ============================================================================
   LESSON LIST
   ============================================================================ */

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

.lesson-item {
    border-bottom: 1px solid var(--slate-200);
}

.lesson-item:last-child {
    border-bottom: none;
}

.lesson-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    color: inherit;
    transition: background var(--transition-fast);
}

.lesson-link:hover {
    background: var(--slate-50);
    text-decoration: none;
}

.lesson-status-icon {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    border: 2px solid var(--slate-300);
    flex-shrink: 0;
}

.status-completed .lesson-status-icon {
    background: var(--success);
    border-color: var(--success);
}

.status-in-progress .lesson-status-icon {
    border-color: var(--warning);
    background: var(--warning);
}

.lesson-title {
    flex: 1;
}

/* ============================================================================
   AUTH PAGES
   ============================================================================ */

.auth-container {
    display: flex;
    justify-content: center;
    padding: var(--spacing-3xl) 0;
}

.auth-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
    border-top: 4px solid var(--accent-gold);
}

.auth-card h1 {
    text-align: center;
    font-size: 2rem;
}

.auth-subtitle {
    text-align: center;
    color: var(--slate-500);
    margin-bottom: var(--spacing-xl);
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    color: var(--slate-500);
}

/* ============================================================================
   ADMIN LESSON LIST
   ============================================================================ */

.admin-lesson-list {
    list-style: none;
    padding: 0;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.admin-lesson-list .lesson-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    gap: var(--spacing-md);
}

.lesson-position {
    width: 36px;
    height: 36px;
    background: var(--primary-subtle);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    color: var(--primary);
}

.lesson-info {
    flex: 1;
}

.lesson-slug {
    font-size: 0.875rem;
    color: var(--slate-500);
}

.lesson-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ============================================================================
   UTILITIES
   ============================================================================ */

.text-muted {
    color: var(--slate-500);
}

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

.inline-form {
    display: inline;
}

code {
    background: var(--slate-100);
    padding: 0.1875rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--primary-dark);
    font-family: 'Consolas', 'Monaco', monospace;
}

pre.meta-json {
    font-size: 0.8125rem;
    background: var(--slate-100);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    max-width: 320px;
}

details summary {
    cursor: pointer;
    color: var(--primary);
    font-weight: var(--font-weight-medium);
}

/* ============================================================================
   ADDITIONAL COMPONENTS
   ============================================================================ */

.thread-list,
.activity-list {
    list-style: none;
    padding: 0;
    background: white;
    border-radius: var(--radius-lg);
}

.thread-list li,
.activity-list li {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--slate-200);
}

.thread-list li:last-child,
.activity-list li:last-child {
    border-bottom: none;
}

.thread-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.grid-two-col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.section {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.section h2 {
    margin-bottom: var(--spacing-lg);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-lg);
    color: var(--slate-500);
}

.error-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

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

.error-code {
    font-size: 8rem;
    font-weight: var(--font-weight-bold);
    color: var(--slate-300);
    margin: 0;
    font-family: var(--font-serif);
}

.error-message {
    font-size: 1.375rem;
    color: var(--slate-600);
    margin-bottom: var(--spacing-2xl);
}

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

.pagination-info {
    color: var(--slate-500);
}

.filters {
    margin-bottom: var(--spacing-lg);
}

.filter-form {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.filter-form select {
    padding: 0.5rem var(--spacing-md);
    border: 2px solid var(--slate-200);
    border-radius: var(--radius-md);
}

.danger-zone {
    margin-top: var(--spacing-3xl);
    padding: var(--spacing-xl);
    border: 2px solid var(--danger);
    border-radius: var(--radius-lg);
    background: var(--danger-light);
}

.danger-zone h3 {
    color: var(--danger);
    margin-bottom: var(--spacing-lg);
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

@media (max-width: 1024px) {
    .lesson-layout {
        grid-template-columns: 1fr;
    }

    .lesson-sidebar {
        order: -1;
        position: static;
    }

    .ai-chat-panel {
        height: 500px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-3xl: 3rem;
        --spacing-4xl: 4rem;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.375rem; }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .mission h2,
    .features h2,
    .how-it-works h2,
    .positioning h2,
    .audience h2,
    .trust h2,
    .final-cta h2 {
        font-size: 1.875rem;
    }

    .feature-grid,
    .process-steps,
    .positioning-grid,
    .audience-grid {
        gap: var(--spacing-lg);
    }

    .navbar-menu {
        gap: var(--spacing-sm);
    }

    .nav-link {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .feature-card,
    .step,
    .positioning-column,
    .audience-card {
        padding: var(--spacing-lg);
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }
}

/* ============================================================================
   ACCESSIBILITY
   ============================================================================ */

/* Focus visible styles for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--accent-gold);
    outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary: #0a2540;
        --slate-700: #1e293b;
    }

    .btn,
    .card,
    .feature-card {
        border: 2px solid currentColor;
    }
}