/* ==========================================
   CSS VARIABLES
   ========================================== */
:root {
    --bg-deep: #030712;
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --primary: #3b82f6;
    --primary-light: #60a5fa;
    --accent: #22d3ee;
    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f87171;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(255, 255, 255, 0.1);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
    --font-display: 'Syne', sans-serif;
    --font-body: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-glow: 0 0 40px rgba(34, 211, 238, 0.15);
}

/* ==========================================
   RESET & BASE
   ========================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--accent);
    color: var(--bg-deep);
}

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

button {
    font-family: inherit;
}

/* ==========================================
   WATER EFFECT OVERLAY (Fixed - No color change)
   ========================================== */
#water-effect-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
}

#water-effect-container canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

/* ==========================================
   STARS BACKGROUND
   ========================================== */
.stars-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
    pointer-events: none;
}

.star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    animation: twinkle 2s infinite ease-in-out;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

/* ==========================================
   NAVIGATION
   ========================================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 2rem;
    transition: var(--transition);
    background: transparent;
}

header.scrolled {
    background: rgba(3, 7, 18, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    flex-shrink: 0;
}

.logo-icon {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.logo-tag {
    font-size: 0.55rem;
    padding: 0.2rem 0.4rem;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    border-radius: 4px;
    color: var(--bg-deep);
    font-weight: 600;
    letter-spacing: 0.05em;
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    white-space: nowrap;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

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

.nav-link:hover::after {
    width: 100%;
}

.auth-buttons {
    display: flex;
    gap: 0.75rem;
    flex-shrink: 0;
}

.login-btn, .signup-btn {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    white-space: nowrap;
}

.login-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.login-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent);
}

.signup-btn {
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    border: none;
    color: var(--bg-deep);
}

.signup-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(34, 211, 238, 0.4);
}

/* User Profile */
.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-deep);
    overflow: hidden;
    flex-shrink: 0;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-name {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.logout-btn {
    padding: 0.5rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.logout-btn:hover {
    background: rgba(248, 113, 113, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1002;
    position: relative;
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
    transform-origin: center;
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-auth {
    display: none;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.mobile-user-profile {
    display: none;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.mobile-user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 6rem 1.5rem 4rem;
    overflow: hidden;
}

.video-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.video-background video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(3, 7, 18, 0.9) 0%, 
        rgba(30, 27, 75, 0.8) 50%, 
        rgba(3, 7, 18, 0.9) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 900px;
    text-align: center;
    z-index: 1;
    width: 100%;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.title-line {
    display: block;
    color: var(--text-secondary);
    font-size: 0.5em;
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.title-highlight {
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cursor {
    animation: blink 1s infinite;
    color: var(--accent);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: clamp(0.95rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
    padding: 0 1rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
    padding: 0 1rem;
}

.primary-btn, .secondary-btn {
    padding: 0.875rem 1.5rem;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    min-width: 160px;
}

.primary-btn {
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    border: none;
    color: var(--bg-deep);
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(34, 211, 238, 0.4);
}

.secondary-btn {
    background: transparent;
    border: 2px solid var(--border);
    color: var(--text-primary);
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    min-width: 80px;
}

.stat-number {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.stat-divider {
    width: 1px;
    background: var(--border);
    align-self: stretch;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.scroll-indicator i {
    color: var(--accent);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ==========================================
   SECTIONS
   ========================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: var(--accent);
    background: rgba(34, 211, 238, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================
   COURSES SECTION
   ========================================== */
.courses-section {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--bg-deep), var(--bg-dark));
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.course-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    opacity: 0;
    transform: translateY(20px);
}

.course-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
    border-color: var(--accent);
}

.course-card.featured {
    border-color: var(--accent);
}

.course-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--accent);
    color: var(--bg-deep);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.3rem 0.6rem;
    border-radius: 20px;
    z-index: 10;
}

.course-badge.new {
    background: var(--success);
}

.course-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.course-card:hover .course-image img {
    transform: scale(1.1);
}

.course-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(3, 7, 18, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.course-card:hover .course-overlay {
    opacity: 1;
}

.play-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    color: var(--bg-deep);
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0.8);
}

.course-card:hover .play-btn {
    transform: scale(1);
}

.play-btn:hover {
    background: var(--primary-light);
    transform: scale(1.1);
}

.course-content {
    padding: 1.25rem;
}

.course-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.course-meta span {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.course-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.course-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    gap: 0.5rem;
}

.course-instructor {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
    flex: 1;
}

.course-instructor img {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.course-instructor span {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-price {
    font-weight: 700;
    color: var(--success);
    font-size: 0.9rem;
    flex-shrink: 0;
}

.courses-cta {
    text-align: center;
    margin-top: 2.5rem;
}

.view-all-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.view-all-btn:hover {
    gap: 1rem;
}

/* ==========================================
   LIVE SESSIONS SECTION
   ========================================== */
.live-section {
    padding: 5rem 0;
    background: var(--bg-dark);
}

.live-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.live-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border);
    transition: var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.live-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.live-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.live-status {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.live-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.6rem;
    border-radius: 20px;
    font-size: 0.65rem;
    font-weight: 700;
}

.upcoming-badge {
    background: rgba(52, 211, 153, 0.1);
    color: var(--success);
}

.coming-soon-badge {
    background: rgba(251, 191, 36, 0.1);
    color: var(--warning);
}

.past-badge {
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-muted);
}

.live-date, .live-views {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.live-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.live-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.live-host {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
}

.live-host img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.host-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.host-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.host-title {
    font-size: 0.7rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.live-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.remind-btn, .watch-btn {
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.remind-btn {
    background: rgba(52, 211, 153, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.remind-btn:hover:not(:disabled) {
    background: var(--success);
    color: var(--bg-deep);
}

.remind-btn:disabled {
    opacity: 0.7;
    cursor: default;
}

.watch-btn {
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    border: none;
    color: var(--bg-deep);
}

.watch-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(34, 211, 238, 0.4);
}

.attendees {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ==========================================
   WHY SECTION
   ========================================== */
.why-section {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--bg-dark), var(--bg-deep));
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    padding: 1.75rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    text-align: center;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.feature-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 1.25rem;
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.1), rgba(59, 130, 246, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--accent);
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.feature-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================
   NEWSLETTER SECTION
   ========================================== */
.newsletter-section {
    padding: 4rem 0;
    background: var(--bg-deep);
}

.newsletter-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.1), rgba(59, 130, 246, 0.1));
    border: 1px solid var(--border);
    border-radius: 20px;
}

.newsletter-text {
    flex: 1;
    min-width: 200px;
}

.newsletter-text h2 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
}

.newsletter-text p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.newsletter-form {
    display: flex;
    gap: 0.75rem;
    flex: 1;
    max-width: 400px;
    min-width: 280px;
}

.newsletter-form input {
    flex: 1;
    padding: 0.8rem 1rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-dark);
    color: var(--text-primary);
    font-size: 0.9rem;
    min-width: 0;
}

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

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

.newsletter-form button {
    padding: 0.8rem 1.25rem;
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    border: none;
    border-radius: 10px;
    color: var(--bg-deep);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
}

.newsletter-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(34, 211, 238, 0.4);
}

/* ==========================================
   FOOTER
   ========================================== */
footer {
    padding: 4rem 0 2rem;
    background: var(--bg-dark);
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 3rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.footer-brand {
    max-width: 280px;
    flex-shrink: 0;
}

.footer-brand .logo {
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 0.75rem;
}

.social-links a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--accent);
    color: var(--bg-deep);
}

.footer-links {
    display: flex;
    gap: 3rem;
    flex-wrap: wrap;
}

.footer-column h4 {
    font-family: var(--font-display);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--accent);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ==========================================
   BACK TO TOP
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    color: var(--bg-deep);
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 100;
    box-shadow: 0 4px 20px rgba(34, 211, 238, 0.4);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(34, 211, 238, 0.5);
}

.back-to-top.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

/* ==========================================
   TOAST NOTIFICATION
   ========================================== */
.toast {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.875rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    max-width: calc(100vw - 2rem);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
}

.toast.success .toast-icon {
    color: var(--success);
}

.toast.error .toast-icon {
    color: var(--danger);
}

.toast.error {
    border-color: var(--danger);
}

#toast-message {
    font-size: 0.9rem;
}

/* ==========================================
   MODALS
   ========================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(3, 7, 18, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 16px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: var(--transition);
    scrollbar-width: thin;
    scrollbar-color: var(--accent) transparent;
    width: 100%;
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-content::-webkit-scrollbar {
    width: 6px;
}

.modal-content::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 3px;
}

.close-modal {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.close-modal:hover {
    background: rgba(248, 113, 113, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

.hidden {
    display: none !important;
}

/* ==========================================
   AUTH MODAL
   ========================================== */
.auth-content {
    max-width: 420px;
    padding: 2rem;
}

.auth-header {
    text-align: center;
    margin-bottom: 1.75rem;
}

.auth-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.25rem;
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.1), rgba(59, 130, 246, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent);
}

.auth-header h2 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.input-wrapper {
    position: relative;
}

.input-wrapper i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.input-wrapper input {
    width: 100%;
    padding: 0.8rem 1rem 0.8rem 2.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: var(--transition);
}

.input-wrapper input::placeholder {
    color: var(--text-muted);
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--accent);
}

.form-error {
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.auth-submit-btn {
    width: 100%;
    padding: 0.9rem;
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    border: none;
    border-radius: 10px;
    color: var(--bg-deep);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.auth-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(34, 211, 238, 0.4);
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.25rem 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.auth-divider span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.google-btn {
    width: 100%;
    padding: 0.8rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.google-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-secondary);
}

.auth-footer {
    text-align: center;
    margin-top: 1.25rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* ==========================================
   COURSE MODAL
   ========================================== */
.course-content {
    max-width: 900px;
}

.course-modal-header {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.course-modal-header img {
    width: 180px;
    height: 120px;
    object-fit: cover;
    border-radius: 12px;
    flex-shrink: 0;
}

.course-modal-info {
    flex: 1;
    min-width: 0;
}

.course-level-badge {
    display: inline-block;
    padding: 0.3rem 0.6rem;
    background: rgba(34, 211, 238, 0.1);
    color: var(--accent);
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.course-modal-info h2 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.course-modal-info > p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-meta-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.course-meta-row span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.course-meta-row span i {
    color: var(--accent);
}

/* Progress Indicator */
.course-progress {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    margin: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 10px;
}

.progress-ring {
    width: 48px;
    height: 48px;
    position: relative;
    flex-shrink: 0;
}

.progress-ring svg {
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: var(--border);
    stroke-width: 4;
}

.progress-ring-fill {
    fill: none;
    stroke: var(--accent);
    stroke-width: 4;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.5s ease;
}

.progress-ring-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--accent);
}

.progress-info h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.progress-info p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Copyright Notice */
.copyright-notice {
    background: linear-gradient(135deg, rgba(248, 113, 113, 0.1), rgba(251, 191, 36, 0.1));
    border: 1px solid rgba(251, 191, 36, 0.3);
    border-radius: 10px;
    padding: 0.875rem 1rem;
    margin: 0 1.5rem 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.copyright-notice-icon {
    color: var(--warning);
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.copyright-notice-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.copyright-notice-text strong {
    color: var(--warning);
}

.course-modal-body {
    padding: 1.5rem;
}

.lectures-section h3,
.instructor-section h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.lectures-section h3 i,
.instructor-section h3 i {
    color: var(--accent);
}

.lectures-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 1.5rem;
}

.lecture-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.lecture-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent);
}

.lecture-item.locked {
    opacity: 0.6;
    cursor: not-allowed;
}

.lecture-item.locked:hover {
    transform: none;
    border-color: var(--border);
    background: rgba(255, 255, 255, 0.03);
}

.lecture-item.locked .lecture-play-btn {
    background: var(--text-muted);
    cursor: not-allowed;
}

.lecture-lock-icon {
    color: var(--warning);
    font-size: 0.8rem;
    margin-left: 0.4rem;
}

.lecture-item.completed .lecture-number {
    background: rgba(52, 211, 153, 0.2);
    color: var(--success);
    border: 1px solid var(--success);
}

.lecture-item.completed .lecture-check {
    color: var(--success);
    margin-left: 0.4rem;
}

.lecture-number {
    width: 32px;
    height: 32px;
    background: rgba(34, 211, 238, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    flex-shrink: 0;
}

.lecture-info {
    flex: 1;
    min-width: 0;
}

.lecture-info h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.2rem;
}

.lecture-info p {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lecture-duration {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.3rem;
    flex-shrink: 0;
}

.lecture-play-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    color: var(--bg-deep);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.8rem;
}

.lecture-play-btn:hover:not(:disabled) {
    background: var(--primary-light);
    transform: scale(1.1);
}

.lecture-play-btn:disabled {
    cursor: not-allowed;
}

.instructor-card {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 10px;
}

.instructor-card img {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.instructor-info h4 {
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.instructor-info span {
    font-size: 0.75rem;
    color: var(--accent);
    display: block;
    margin-bottom: 0.5rem;
}

.instructor-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ==========================================
   VIDEO MODAL - REFINED
   ========================================== */
.video-content {
    max-width: 900px;
    padding: 1rem;
    background: var(--bg-deep);
}

.video-header {
    margin-bottom: 0.75rem;
    padding-right: 2.5rem;
}

.video-course-name {
    font-size: 0.75rem;
    color: var(--accent);
    display: block;
    margin-bottom: 0.25rem;
}

.video-header h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    line-height: 1.3;
}

.video-player-container {
    position: relative;
    background: #000;
    aspect-ratio: 16/9;
    overflow: hidden;
    border-radius: 12px;
}

.video-player-container video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

/* Custom Video Controls */
.video-controls-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.9));
    padding: 1.5rem 1rem 0.75rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-controls-overlay.visible,
.video-player-container:hover .video-controls-overlay {
    opacity: 1;
}

.video-controls-inner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.video-play-pause-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    color: var(--bg-deep);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    transition: var(--transition);
    flex-shrink: 0;
}

.video-play-pause-btn:hover {
    background: var(--primary);
    transform: scale(1.05);
}

.video-progress-wrapper {
    flex: 1;
    min-width: 0;
}

.video-progress-container {
    height: 6px;
    background: rgba(255,255,255,0.2);
    border-radius: 3px;
    cursor: not-allowed;
    position: relative;
    overflow: hidden;
}

.video-progress-bar {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    width: 0%;
    transition: width 0.1s linear;
}

.video-time {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-secondary);
    flex-shrink: 0;
    white-space: nowrap;
}

.video-volume-btn,
.video-fullscreen-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: rgba(255,255,255,0.1);
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
    font-size: 0.85rem;
}

.video-volume-btn:hover,
.video-fullscreen-btn:hover {
    background: rgba(255,255,255,0.2);
}

/* Big Play Overlay */
.video-play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    z-index: 5;
}

.video-play-overlay.hidden {
    display: none;
}

.video-big-play-btn {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    color: var(--bg-deep);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-big-play-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 30px rgba(34, 211, 238, 0.5);
}

.video-big-play-btn i {
    margin-left: 4px;
}

/* Video Loading */
.video-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    color: var(--text-secondary);
    z-index: 6;
}

.video-loading.hidden {
    display: none;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.video-loading p {
    font-size: 0.9rem;
}

/* Video Completion Overlay */
.video-completion-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(3, 7, 18, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.completion-content {
    text-align: center;
    padding: 2rem;
}

.completion-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--success), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--bg-deep);
    margin: 0 auto 1.25rem;
    animation: scaleIn 0.5s ease-out;
}

@keyframes scaleIn {
    from { transform: scale(0); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.completion-text {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.completion-subtext {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.next-lecture-btn {
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    color: var(--bg-deep);
    border: none;
    border-radius: 10px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.next-lecture-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(34, 211, 238, 0.4);
}

/* Video Info Section */
.video-info-section {
    margin-top: 1rem;
}

.video-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 0.875rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.speed-disabled-notice {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.875rem;
    background: rgba(251, 191, 36, 0.1);
    border-radius: 8px;
    font-size: 0.75rem;
    color: var(--warning);
}

.speed-disabled-notice i {
    flex-shrink: 0;
}

.video-navigation {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1rem;
}

.nav-btn {
    padding: 0.6rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.nav-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==========================================
   LOGIN REQUIRED MODAL
   ========================================== */
.login-required-content {
    padding: 2.5rem 2rem;
    text-align: center;
    max-width: 380px;
}

.login-required-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.25rem;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(248, 113, 113, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--warning);
}

.login-required-content h2 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
}

.login-required-content > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.login-required-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.login-required-actions .primary-btn,
.login-required-actions .secondary-btn {
    min-width: 140px;
    padding: 0.75rem 1.25rem;
}

/* ==========================================
   TERMS MODAL
   ========================================== */
.terms-content {
    max-width: 560px;
    padding: 2rem;
    max-height: 85vh;
}

.terms-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.terms-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.25rem;
    background: linear-gradient(135deg, rgba(248, 113, 113, 0.2), rgba(251, 191, 36, 0.2));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--warning);
}

.terms-header h2 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.terms-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.terms-body {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.terms-item {
    display: flex;
    gap: 0.875rem;
    margin-bottom: 0.875rem;
    padding-bottom: 0.875rem;
    border-bottom: 1px solid var(--border);
}

.terms-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.terms-item-icon {
    width: 32px;
    height: 32px;
    background: rgba(248, 113, 113, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--danger);
    font-size: 0.8rem;
    flex-shrink: 0;
}

.terms-item-text h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.terms-item-text p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.terms-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    cursor: pointer;
}

.terms-checkbox input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
    margin-top: 2px;
    flex-shrink: 0;
}

.terms-checkbox span {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.terms-accept-btn {
    width: 100%;
    padding: 0.9rem;
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    color: var(--bg-deep);
    border: none;
    border-radius: 10px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.terms-accept-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(34, 211, 238, 0.4);
}

.terms-accept-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 1024px) {
    .course-modal-header {
        flex-direction: column;
    }
    
    .course-modal-header img {
        width: 100%;
        height: 180px;
    }
}

@media (max-width: 768px) {
    header {
        padding: 0.75rem 1rem;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 320px;
        height: 100vh;
        height: 100dvh;
        background: var(--bg-dark);
        padding: 5rem 1.5rem 2rem;
        transition: right 0.3s ease;
        z-index: 999;
        border-left: 1px solid var(--border);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 1.25rem;
    }
    
    .nav-link {
        font-size: 1.05rem;
        display: block;
        padding: 0.5rem 0;
    }
    
    .auth-buttons {
        display: none;
    }
    
    .user-profile {
        display: none;
    }
    
    .mobile-auth {
        display: flex;
    }
    
    .mobile-user-profile.hidden {
        display: none !important;
    }
    
    .mobile-user-profile:not(.hidden) {
        display: flex;
    }
    
    .mobile-auth.hidden {
        display: none !important;
    }
    
    .hero {
        padding: 5rem 1rem 3rem;
        min-height: calc(100vh - 60px);
        min-height: calc(100dvh - 60px);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .primary-btn, .secondary-btn {
        width: 100%;
        max-width: 260px;
    }
    
    .stat-divider {
        display: none;
    }
    
    .hero-stats {
        justify-content: space-around;
        gap: 1rem;
    }
    
    .courses-grid,
    .live-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-content {
        flex-direction: column;
        text-align: center;
    }
    
    .newsletter-form {
        width: 100%;
        max-width: none;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-brand {
        max-width: none;
    }
    
    .footer-links {
        justify-content: center;
        gap: 2rem;
    }
    
    /* Modals Mobile */
    .modal {
        padding: 0.5rem;
        align-items: flex-end;
    }
    
    .modal-content {
        max-height: 95vh;
        max-height: 95dvh;
        border-radius: 16px 16px 0 0;
    }
    
    .auth-content {
        padding: 1.5rem;
    }
    
    .course-content {
        padding: 1rem;
    }
    
    .course-modal-header {
        padding: 1rem;
    }
    
    .course-modal-body {
        padding: 1rem;
    }
    
    .copyright-notice,
    .course-progress {
        margin-left: 1rem;
        margin-right: 1rem;
    }
    
    .video-content {
        padding: 0.75rem;
    }
    
    .video-controls-inner {
        gap: 0.5rem;
    }
    
    .video-time {
        display: none;
    }
    
    .video-play-pause-btn {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }
    
    .video-volume-btn,
    .video-fullscreen-btn {
        width: 28px;
        height: 28px;
        font-size: 0.75rem;
    }
    
    .video-big-play-btn {
        width: 60px;
        height: 60px;
        font-size: 1.25rem;
    }
    
    .terms-content {
        padding: 1.5rem;
    }
    
    .login-required-content {
        padding: 2rem 1.5rem;
    }
    
    .login-required-actions {
        flex-direction: column;
    }
    
    .login-required-actions .primary-btn,
    .login-required-actions .secondary-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .section-header {
        margin-bottom: 2rem;
    }
    
    .logo-text {
        font-size: 0.95rem;
    }
    
    .logo-tag {
        display: none;
    }
    
    .lecture-item {
        flex-wrap: wrap;
    }
    
    .lecture-duration {
        order: 5;
        width: 100%;
        margin-top: 0.5rem;
        padding-left: calc(32px + 0.75rem);
    }
    
    .lecture-play-btn {
        order: 4;
    }
    
    .video-navigation {
        flex-direction: column;
    }
    
    .nav-btn {
        justify-content: center;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form button {
        width: 100%;
        justify-content: center;
    }
}

/* Touch device improvements */
@media (hover: none) {
    .video-controls-overlay {
        opacity: 1;
    }
    
    .course-card:hover {
        transform: none;
    }
    
    .course-card:hover .course-overlay {
        opacity: 0;
    }
    
    .course-card:active .course-overlay {
        opacity: 1;
    }
}

/* Safe area for notched devices */
@supports (padding: max(0px)) {
    .modal-content {
        padding-bottom: max(1rem, env(safe-area-inset-bottom));
    }
    
    .nav-menu {
        padding-bottom: max(2rem, env(safe-area-inset-bottom));
    }
}