/* PIXALANGUE V4 - Stylesheet */
:root {
    --primary: #FF6B35;
    --primary-dark: #E55A2B;
    --secondary: #4ECDC4;
    --accent: #FFE66D;
    --dark: #2C3E50;
    --light: #F7F9FC;
    --white: #FFFFFF;
    --gray: #95A5A6;
    --success: #2ECC71;
    --danger: #E74C3C;
    --warning: #F39C12;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #1A1A2E 0%, #16213E 40%, #0F3460 100%);
    background-attachment: fixed;
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Animated background shapes */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255,107,53,0.12) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    animation: floatShape 20s ease-in-out infinite;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(78,205,196,0.10) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    animation: floatShape 25s ease-in-out infinite reverse;
    pointer-events: none;
}

@keyframes floatShape {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

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

.particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.03);
    animation: particleFloat linear infinite;
    pointer-events: none;
}

@keyframes particleFloat {
    0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-100px) rotate(720deg); opacity: 0; }
}

/* RTL Support */
[dir="rtl"] body { font-family: 'Noto Sans Arabic', 'Poppins', sans-serif; }
[dir="rtl"] .nav-links { flex-direction: row-reverse; }
[dir="rtl"] .nav-actions { flex-direction: row-reverse; }
[dir="rtl"] .hero-stats { flex-direction: row-reverse; }
[dir="rtl"] .features-grid { direction: rtl; }
[dir="rtl"] .courses-grid { direction: rtl; }
[dir="rtl"] .levels-path { direction: rtl; }
[dir="rtl"] .lesson-nav { flex-direction: row-reverse; }
[dir="rtl"] .player-sidebar { border-right: none; border-left: 1px solid #eee; }
[dir="rtl"] .filter-bar { flex-direction: row-reverse; }

/* Loading Screen - hidden for static demo */
#loading-screen { display: none !important; }
.loader { text-align: center; }
.globe { font-size: 80px; animation: float 3s ease-in-out infinite; }
.loading-text {
    color: var(--white);
    font-size: 28px;
    font-weight: 700;
    margin-top: 20px;
    letter-spacing: 4px;
}
.loading-bar {
    width: 200px;
    height: 4px;
    background: rgba(255,255,255,0.3);
    border-radius: 2px;
    margin: 20px auto 0;
    overflow: hidden;
}
.loading-progress {
    width: 0%;
    height: 100%;
    background: var(--white);
    border-radius: 2px;
    animation: loadProgress 2s ease-out forwards;
}
@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}
@keyframes loadProgress {
    0% { width: 0%; }
    100% { width: 100%; }
}

/* Navigation */
#main-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 70px;
    background: rgba(26,26,46,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    transition: var(--transition);
}
.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
}
.logo-icon { font-size: 32px; }
.logo-p { color: #E74C3C; }
.logo-i { color: #9B59B6; }
.logo-x { color: #3498DB; }
.logo-a { color: #2ECC71; }
.logo-l { color: #F1C40F; }
.logo-n { color: #FF6B35; }
.logo-g { color: #E67E22; }
.logo-u { color: #1ABC9C; }
.logo-e { color: #FF6B35; }
.logo-text, .logo-text-footer { font-weight: 800; }
.footer-brand .logo-text-footer { font-size: 24px; }
.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}
.nav-link {
    text-decoration: none;
    color: rgba(255,255,255,0.8);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}
.nav-link:hover, .nav-link.active {
    color: var(--primary);
    background: rgba(255,107,53,0.15);
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}
.ui-lang-selector { position: relative; }
.lang-btn {
    background: var(--light);
    border: 2px solid var(--primary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}
.lang-btn:hover { background: var(--primary); color: var(--white); }
.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    padding: 10px 0;
    min-width: 180px;
    display: none;
    z-index: 100;
}
.ui-lang-selector:hover .lang-dropdown { display: block; }
.lang-dropdown div {
    padding: 10px 20px;
    cursor: pointer;
    transition: var(--transition);
}
.lang-dropdown div:hover { background: var(--light); color: var(--primary); }
#auth-btn, #user-menu button {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 10px 24px;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}
#auth-btn:hover, #user-menu button:hover { background: var(--primary-dark); transform: translateY(-2px); }
#user-menu { display: flex; align-items: center; gap: 10px; }
#user-name { font-weight: 600; color: rgba(255,255,255,0.9); }
.mobile-menu-btn { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--white); }

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
}
.modal.active { display: flex; }
.modal-content {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px;
    width: 90%;
    max-width: 450px;
    position: relative;
    animation: modalSlide 0.3s ease;
    box-shadow: var(--shadow-lg);
}
@keyframes modalSlide {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}
.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    cursor: pointer;
    color: var(--gray);
    transition: var(--transition);
}
.close-btn:hover { color: var(--danger); }
.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}
.auth-tab {
    flex: 1;
    padding: 12px;
    border: none;
    background: var(--light);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}
.auth-tab.active { background: var(--primary); color: var(--white); }
.auth-form { display: none; }
.auth-form.active { display: block; }
.auth-form h2 { margin-bottom: 20px; color: var(--dark); }
.auth-form input {
    width: 100%;
    padding: 14px;
    margin-bottom: 15px;
    border: 2px solid #e0e0e0;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 15px;
    transition: var(--transition);
}
.auth-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255,107,53,0.1);
}
.auth-form button {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
}
.auth-form button:hover { background: var(--primary-dark); }
.error-msg { color: var(--danger); font-size: 14px; margin-top: 10px; text-align: center; }

/* Pages */
.page { display: none; padding-top: 90px; min-height: 100vh; }
.page.active { display: block; }
.section-header {
    text-align: center;
    padding: 40px 20px;
    max-width: 800px;
    margin: 0 auto;
}
.section-header h1 { font-size: 36px; margin-bottom: 10px; color: var(--white); }
.section-header p { color: rgba(255,255,255,0.6); font-size: 18px; }

/* Hero */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 60px 40px;
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - 70px);
    gap: 60px;
}
.hero-content { flex: 1; }
.hero-content h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--white);
}
.hero-content h1 span[class^="logo-"] {
    -webkit-text-fill-color: initial !important;
}
.hero-content p {
    font-size: 20px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 30px;
}
.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}
.stat { text-align: center; }
.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
}
.stat-label { font-size: 14px; color: rgba(255,255,255,0.5); text-transform: uppercase; letter-spacing: 1px; }
.cta-btn {
    padding: 16px 40px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    border: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(255,107,53,0.3);
}
.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(255,107,53,0.4);
}
.hero-visual { flex: 0 0 400px; }
.lang-orbit {
    width: 400px;
    height: 400px;
    position: relative;
    animation: orbitRotate 20s linear infinite;
}
.orbit-center {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 60px;
    z-index: 10;
}
.orbit-item {
    position: absolute;
    font-size: 40px;
    top: 50%; left: 50%;
    transform: rotate(calc(var(--i) * 51.4deg)) translateX(150px) rotate(calc(var(--i) * -51.4deg));
    animation: counterRotate 20s linear infinite;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
}
@keyframes orbitRotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes counterRotate { from { transform: rotate(calc(var(--i) * 51.4deg)) translateX(150px) rotate(calc(var(--i) * -51.4deg + 0deg)); } to { transform: rotate(calc(var(--i) * 51.4deg)) translateX(150px) rotate(calc(var(--i) * -51.4deg - 360deg)); } }

/* Features */
.features-section { padding: 60px 40px; max-width: 1400px; margin: 0 auto; }
.features-section h2 { text-align: center; font-size: 32px; margin-bottom: 50px; color: var(--white); }
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.feature-card {
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    transition: var(--transition);
    text-align: center;
}
.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.1);
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
    border-color: rgba(255,107,53,0.3);
}
.feature-icon { font-size: 48px; margin-bottom: 20px; }
.feature-card h3 { font-size: 20px; margin-bottom: 10px; color: var(--white); }
.feature-card p { color: rgba(255,255,255,0.6); font-size: 15px; }

/* Languages Grid */
.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    padding: 0 40px 60px;
    max-width: 1400px;
    margin: 0 auto;
}
.language-card {
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
}
.language-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: var(--transition);
}
.language-card:hover::before { transform: scaleX(1); }
.language-card:hover {
    transform: translateY(-8px);
    background: rgba(255,255,255,0.1);
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
    border-color: rgba(255,107,53,0.3);
}
.lang-flag { font-size: 64px; margin-bottom: 15px; display: block; }
.lang-name { font-size: 22px; font-weight: 700; margin-bottom: 5px; color: var(--white); }
.lang-native { font-size: 16px; color: rgba(255,255,255,0.5); margin-bottom: 15px; }
.lang-count { display: inline-block; background: rgba(255,107,53,0.15); padding: 6px 16px; border-radius: 20px; font-size: 13px; font-weight: 600; color: var(--primary); }

/* Levels Path */
.levels-path {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 0 40px 60px;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}
.levels-path::before {
    content: '';
    position: absolute;
    left: 50px;
    top: 0; bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    border-radius: 2px;
}
.level-node {
    display: flex;
    align-items: center;
    gap: 25px;
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 25px 30px;
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    margin-left: 20px;
}
.level-node:hover {
    transform: translateX(10px);
    background: rgba(255,255,255,0.1);
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
    border-color: rgba(255,107,53,0.3);
}
.level-badge {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(255,107,53,0.3);
}
.level-badge.exam { background: linear-gradient(135deg, var(--secondary), #3DBBB4); }
.level-info { flex: 1; }
.level-info h3 { font-size: 20px; margin-bottom: 5px; color: var(--white); }
.level-info p { color: rgba(255,255,255,0.5); font-size: 14px; }
.level-arrow { font-size: 24px; color: rgba(255,255,255,0.4); transition: var(--transition); }
.level-node:hover .level-arrow { color: var(--primary); transform: translateX(5px); }

/* Courses */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
    padding: 0 40px 60px;
    max-width: 1400px;
    margin: 0 auto;
}
.filter-bar {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}
.filter-btn {
    padding: 10px 24px;
    background: rgba(255,255,255,0.08);
    border: 2px solid rgba(255,255,255,0.15);
    border-radius: 30px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-family: inherit;
    color: rgba(255,255,255,0.8);
}
.filter-btn.active, .filter-btn:hover {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}
.course-card {
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    transition: var(--transition);
    cursor: pointer;
}
.course-card:hover { transform: translateY(-5px); background: rgba(255,255,255,0.1); box-shadow: 0 12px 40px rgba(0,0,0,0.3); border-color: rgba(255,107,53,0.3); }
.course-image {
    height: 160px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
}
.course-body { padding: 25px; }
.course-type {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 10px;
}
.course-type.lesson { background: rgba(78,205,196,0.15); color: #3DBBB4; }
.course-type.capsule { background: rgba(255,107,53,0.15); color: var(--primary); }
.course-type.exam_prep { background: rgba(243,156,18,0.15); color: var(--warning); }
.course-body h3 { font-size: 18px; margin-bottom: 8px; color: var(--white); }
.course-body p { color: rgba(255,255,255,0.5); font-size: 14px; margin-bottom: 15px; }
.course-meta-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}
.course-progress-mini {
    width: 100%;
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    margin-top: 15px;
    overflow: hidden;
}
.course-progress-mini .fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 3px;
    transition: width 0.5s ease;
}

/* Course Player */
.course-player {
    display: flex;
    min-height: calc(100vh - 70px);
    background: var(--white);
}
.player-sidebar {
    width: 320px;
    background: var(--light);
    padding: 30px;
    border-right: 1px solid #eee;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.back-btn {
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
    color: var(--gray);
    display: flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
    font-family: inherit;
}
.back-btn:hover { color: var(--primary); }
.player-sidebar h2 { font-size: 22px; }
.course-meta { display: flex; gap: 15px; font-size: 14px; color: var(--gray); }
.progress-bar-container { margin-top: auto; }
.progress-bar-container span { font-size: 14px; color: var(--gray); display: block; margin-bottom: 8px; }
.progress-bar { width: 100%; height: 8px; background: #e0e0e0; border-radius: 4px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--secondary)); border-radius: 4px; transition: width 0.5s ease; }
.player-content { flex: 1; padding: 40px; overflow-y: auto; }
.content-area { max-width: 800px; margin: 0 auto; }
.content-area h2 { font-size: 28px; margin-bottom: 20px; }
.content-area p { margin-bottom: 15px; font-size: 16px; line-height: 1.8; }
.content-area .section { margin-bottom: 30px; padding: 25px; background: var(--light); border-radius: var(--radius-sm); }
.content-area .vocab-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--white);
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.vocab-word { font-size: 20px; font-weight: 700; color: var(--primary); }
.vocab-trans { color: var(--gray); }
.vocab-audio { margin-left: auto; cursor: pointer; font-size: 20px; transition: var(--transition); }
.vocab-audio:hover { transform: scale(1.2); }
.lesson-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid #eee;
}
.nav-btn {
    padding: 12px 24px;
    background: var(--light);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-family: inherit;
}
.nav-btn:hover { background: #e0e0e0; }
.nav-btn.primary { background: var(--primary); color: var(--white); }
.nav-btn.primary:hover { background: var(--primary-dark); }

/* Quiz */
.quiz-container { max-width: 700px; margin: 0 auto; }
.quiz-question { font-size: 22px; font-weight: 600; margin-bottom: 30px; padding: 20px; background: rgba(255,255,255,0.06); border-radius: var(--radius-sm); color: var(--white); border: 1px solid rgba(255,255,255,0.1); }
.quiz-options { display: flex; flex-direction: column; gap: 15px; }
.quiz-option {
    padding: 18px 24px;
    background: rgba(255,255,255,0.06);
    border: 2px solid rgba(255,255,255,0.12);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    color: rgba(255,255,255,0.85);
}
.quiz-option:hover { border-color: var(--primary); background: rgba(255,107,53,0.08); }
.quiz-option.selected { border-color: var(--primary); background: rgba(255,107,53,0.12); }
.quiz-option.correct { border-color: var(--success); background: rgba(46,204,113,0.1); }
.quiz-option.wrong { border-color: var(--danger); background: rgba(231,76,60,0.1); }
.quiz-feedback { margin-top: 20px; padding: 20px; border-radius: var(--radius-sm); font-weight: 600; }
.quiz-feedback.correct { background: rgba(46,204,113,0.1); color: var(--success); }
.quiz-feedback.wrong { background: rgba(231,76,60,0.1); color: var(--danger); }
.quiz-actions { margin-top: 25px; display: flex; gap: 15px; }

/* Progress Dashboard */
.progress-dashboard { max-width: 1000px; margin: 0 auto; padding: 0 40px 60px; }
.progress-empty { text-align: center; padding: 60px; color: rgba(255,255,255,0.5); font-size: 18px; }
.progress-lang-card {
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.progress-lang-header { display: flex; align-items: center; gap: 15px; margin-bottom: 20px; }
.progress-lang-header .flag { font-size: 40px; }
.progress-lang-header h3 { font-size: 22px; color: var(--white); }
.progress-courses-list { display: flex; flex-direction: column; gap: 12px; }
.progress-course-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: rgba(255,255,255,0.04);
    border-radius: var(--radius-sm);
}
.progress-course-item .status-icon { font-size: 24px; }
.progress-course-item .status-icon.completed { color: var(--success); }
.progress-course-item .status-icon.in-progress { color: var(--warning); }
.progress-course-item .course-info { flex: 1; }
.progress-course-item .course-info h4 { font-size: 16px; margin-bottom: 3px; color: var(--white); }
.progress-course-item .course-info span { font-size: 13px; color: rgba(255,255,255,0.5); }
.progress-course-item .progress-mini { width: 120px; height: 6px; background: rgba(255,255,255,0.1); border-radius: 3px; overflow: hidden; }
.progress-course-item .progress-mini .fill { height: 100%; background: var(--success); border-radius: 3px; }

/* Admin */
.admin-panel { max-width: 1000px; margin: 0 auto; padding: 0 40px 60px; }
.admin-tabs { display: flex; gap: 10px; margin-bottom: 30px; }
.admin-tab {
    padding: 12px 24px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-family: inherit;
    color: rgba(255,255,255,0.8);
}
.admin-tab.active { background: var(--primary); color: var(--white); border-color: var(--primary); }
.admin-content { display: none; }
.admin-content.active { display: block; }
.admin-content form { display: flex; flex-direction: column; gap: 15px; }
.admin-content input, .admin-content select, .admin-content textarea {
    padding: 14px;
    background: rgba(255,255,255,0.06);
    border: 2px solid rgba(255,255,255,0.12);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 15px;
    transition: var(--transition);
    color: var(--white);
}
.admin-content input:focus, .admin-content select:focus, .admin-content textarea:focus {
    outline: none;
    border-color: var(--primary);
}
.admin-content button[type="submit"] {
    padding: 14px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}
.admin-content button[type="submit"]:hover { background: var(--primary-dark); }

/* Footer */
footer {
    background: var(--dark);
    color: var(--white);
    padding: 60px 40px 30px;
}
.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}
.footer-brand span { font-size: 24px; font-weight: 800; }
.footer-brand p { color: var(--gray); margin-top: 5px; font-size: 14px; }
.footer-links { display: flex; gap: 30px; }
.footer-links a { color: var(--gray); text-decoration: none; transition: var(--transition); }
.footer-links a:hover { color: var(--primary); }
.footer-copy { width: 100%; text-align: center; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); color: var(--gray); font-size: 14px; }

/* Responsive */
@media (max-width: 1024px) {
    .hero { flex-direction: column; text-align: center; }
    .hero-visual { flex: none; }
    .lang-orbit { width: 300px; height: 300px; }
    .orbit-item { transform: rotate(calc(var(--i) * 51.4deg)) translateX(110px) rotate(calc(var(--i) * -51.4deg)); }
    @keyframes counterRotate { from { transform: rotate(calc(var(--i) * 51.4deg)) translateX(110px) rotate(calc(var(--i) * -51.4deg + 0deg)); } to { transform: rotate(calc(var(--i) * 51.4deg)) translateX(110px) rotate(calc(var(--i) * -51.4deg - 360deg)); } }
    .hero-stats { justify-content: center; }
    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
    .course-player { flex-direction: column; }
    .player-sidebar { width: 100%; border-right: none; border-bottom: 1px solid #eee; }
}

@media (max-width: 768px) {
    #main-nav { padding: 0 20px; }
    .hero { padding: 40px 20px; }
    .hero-content h1 { font-size: 36px; }
    .features-grid { grid-template-columns: 1fr; }
    .languages-grid { grid-template-columns: 1fr; padding: 0 20px 40px; }
    .courses-grid { grid-template-columns: 1fr; padding: 0 20px 40px; }
    .levels-path { padding: 0 20px 40px; }
    .levels-path::before { left: 30px; }
    .level-node { margin-left: 10px; padding: 20px; }
    .level-badge { width: 50px; height: 50px; font-size: 16px; }
    .footer-content { flex-direction: column; text-align: center; }
    .section-header h1 { font-size: 28px; }
}

/* Utilities */
.hidden { display: none !important; }
.fade-in { animation: fadeIn 0.5s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }