/* =============================================
   MODERN EĞİTİM PLATFORMU - ANA CSS
   Animasyonlu, Mobil Uyumlu, Modern Tasarım
   ============================================= */

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-dark: #0f0f23;
    --bg-card: rgba(255, 255, 255, 0.1);
    --bg-card-hover: rgba(255, 255, 255, 0.15);
    --text-white: #ffffff;
    --text-light: #f1f5f9;
    --text-gray: #cbd5e1;
    --border-color: rgba(255, 255, 255, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --gradient-bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] {
    --bg-dark: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-card-hover: rgba(255, 255, 255, 1);
    --text-white: #1e293b;
    --text-light: #334155;
    --text-gray: #64748b;
    --border-color: rgba(0, 0, 0, 0.1);
    --gradient-bg: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 50%, #a5b4fc 100%);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Segoe UI', 'Inter', -apple-system, sans-serif;
    background: var(--gradient-bg);
    color: var(--text-light);
    min-height: 100vh;
    line-height: 1.7;
    padding-bottom: 80px;
}

/* ANIMASYONLAR */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.9); } to { opacity: 1; transform: scale(1); } }
@keyframes slideUp { from { transform: translateY(100%); } to { transform: translateY(0); } }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-15px); } }
@keyframes glow { 0%, 100% { box-shadow: 0 0 5px var(--primary-color); } 50% { box-shadow: 0 0 20px var(--primary-color); } }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }

.animate-fade-in { animation: fadeIn 0.6s ease-out forwards; }
.animate-fade-up { animation: fadeInUp 0.6s ease-out forwards; }
.animate-scale { animation: scaleIn 0.5s ease-out forwards; }
.animate-pulse { animation: pulse 2s infinite; }
.animate-float { animation: float 3s ease-in-out infinite; }
.animate-bounce { animation: bounce 2s infinite; }

/* NAVBAR */
.navbar {
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 0.75rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    animation: fadeInDown 0.5s ease-out;
}

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

.navbar-brand,
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-white);
    font-weight: 700;
    font-size: 1.2rem;
}

.navbar-brand i,
.logo i {
    font-size: 1.5rem;
    color: var(--primary-color);
    animation: float 3s ease-in-out infinite;
}

.navbar-menu,
.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none !important;
    margin: 0;
    padding: 0;
}

.navbar-menu li,
.nav-menu li {
    list-style: none !important;
    margin: 0;
    padding: 0;
}

.navbar-menu a,
.nav-menu a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 0.9rem;
    color: var(--text-light);
    text-decoration: none;
    border-radius: 10px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.navbar-menu a:hover, 
.navbar-menu a.active,
.nav-menu a:hover,
.nav-menu a.active {
    color: #fff;
    background: rgba(99, 102, 241, 0.2);
}

.navbar-menu a i,
.nav-menu a i { font-size: 1.1rem; }

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-white);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .navbar-menu,
    .nav-menu {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(15, 15, 35, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1rem;
        gap: 0.5rem;
        border-bottom: 1px solid var(--glass-border);
        animation: slideDown 0.3s ease;
    }
    
    .navbar-menu.active,
    .nav-menu.active {
        display: flex;
    }
    
    .navbar-menu li,
    .nav-menu li {
        width: 100%;
    }
    
    .navbar-menu a,
    .nav-menu a {
        width: 100%;
        padding: 1rem;
        justify-content: center;
    }
    
    @keyframes slideDown {
        from { opacity: 0; transform: translateY(-10px); }
        to { opacity: 1; transform: translateY(0); }
    }
}

.notification-badge { position: relative; }
.notification-badge .badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger-color);
    color: white;
    font-size: 0.65rem;
    padding: 0.15rem 0.4rem;
    border-radius: 50px;
    min-width: 18px;
    text-align: center;
    animation: pulse 2s infinite;
}

.user-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    border: 2px solid var(--primary-light);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: var(--bg-card);
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: white;
    transform: rotate(180deg);
}

/* MOBİL ALT BAR */
.mobile-bottom-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(180deg, rgba(15, 15, 35, 0.95) 0%, rgba(15, 15, 35, 0.98) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.5rem 0;
    padding-bottom: calc(0.5rem + env(safe-area-inset-bottom));
    z-index: 9999;
    box-shadow: 0 -5px 30px rgba(0, 0, 0, 0.3);
}

.mobile-bottom-bar nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
    max-width: 500px;
    margin: 0 auto;
}

.mobile-bottom-bar a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.7rem;
    font-weight: 500;
    border-radius: 12px;
    transition: all 0.2s ease;
    position: relative;
    min-width: 60px;
}

.mobile-bottom-bar a i { 
    font-size: 1.3rem;
    transition: transform 0.2s ease;
}

.mobile-bottom-bar a.active {
    color: #25D366;
}

.mobile-bottom-bar a.active i {
    transform: scale(1.1);
}

.mobile-bottom-bar a:hover {
    color: #fff;
}

/* WhatsApp yeşili accent */
.mobile-bottom-bar a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: #25D366;
    border-radius: 50%;
}

.mobile-bottom-bar .mobile-badge {
    position: absolute;
    top: 2px;
    right: 8px;
    background: #25D366;
    color: white;
    font-size: 0.6rem;
    font-weight: bold;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(37, 211, 102, 0.4);
}

@media (max-width: 768px) {
    .mobile-bottom-bar { display: block; }
    .navbar-menu { display: none !important; }
    body { padding-bottom: 80px; }
    .navbar-brand span { font-size: 0.95rem; }
    .live-chat-btn { bottom: 90px; }
}

/* iPhone X ve üzeri için alt boşluk */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .mobile-bottom-bar {
        padding-bottom: calc(0.5rem + env(safe-area-inset-bottom));
    }
    @media (max-width: 768px) {
        body { padding-bottom: calc(80px + env(safe-area-inset-bottom)); }
    }
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn:hover { transform: translateY(-3px); box-shadow: 0 10px 30px var(--shadow-color); }
.btn:active { transform: translateY(-1px); }

.btn-primary { background: var(--gradient-primary); color: white; }
.btn-primary:hover { box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4); }

.btn-secondary { background: var(--bg-card); color: var(--text-light); border: 1px solid var(--border-color); }
.btn-secondary:hover { background: var(--bg-card-hover); border-color: var(--primary-color); }

.btn-success { background: linear-gradient(135deg, #10b981, #059669); color: white; }
.btn-danger { background: linear-gradient(135deg, #ef4444, #dc2626); color: white; }
.btn-warning { background: linear-gradient(135deg, #f59e0b, #d97706); color: #000; }

.btn-outline { background: transparent; border: 2px solid var(--primary-color); color: var(--primary-color); }
.btn-outline:hover { background: var(--primary-color); color: white; }

.btn-lg { padding: 1rem 2rem; font-size: 1.1rem; }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.85rem; }
.btn-block { width: 100%; }

/* CARDS */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    transition: all 0.4s ease;
    animation: fadeInUp 0.6s ease-out forwards;
}

.card:hover { transform: translateY(-5px); box-shadow: 0 20px 40px var(--shadow-color); }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-white);
}

.card-title i { color: var(--primary-color); margin-right: 0.5rem; }

/* FORMS */
.form-group { margin-bottom: 1.5rem; }

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-light);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.9rem 1rem;
    background: rgba(255, 255, 255, 0.08);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-white);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
    background: rgba(255, 255, 255, 0.12);
}

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

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%23cbd5e1' viewBox='0 0 24 24'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.5rem;
}

/* HERO */
.hero {
    padding: 4rem 2rem;
    text-align: center;
    position: relative;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeInUp 0.8s ease-out;
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-light);
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* AUTH PAGES */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.auth-card {
    width: 100%;
    max-width: 450px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2.5rem;
    animation: scaleIn 0.5s ease-out;
}

.auth-header { text-align: center; margin-bottom: 2rem; }

.auth-header h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-header p { color: var(--text-gray); }

.auth-footer { text-align: center; margin-top: 1.5rem; color: var(--text-gray); }
.auth-footer a { color: var(--primary-color); text-decoration: none; font-weight: 600; }
.auth-footer a:hover { color: var(--primary-light); }

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

.course-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s ease;
}

.course-card:hover { transform: translateY(-10px); box-shadow: 0 25px 50px var(--shadow-color); }

.course-image { position: relative; height: 180px; overflow: hidden; }
.course-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.course-card:hover .course-image img { transform: scale(1.1); }

.course-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.35rem 0.75rem;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 50px;
}

.course-price {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    font-weight: 700;
    border-radius: 10px;
}

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

.course-content { padding: 1.25rem; }
.course-title { font-size: 1.1rem; font-weight: 700; color: var(--text-white); margin-bottom: 0.5rem; }
.course-instructor { color: var(--text-gray); font-size: 0.9rem; margin-bottom: 1rem; }

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

.course-rating { display: flex; align-items: center; gap: 0.25rem; color: var(--warning-color); }
.course-students { color: var(--text-gray); font-size: 0.85rem; }

/* PROFILE */
.profile-container { max-width: 1000px; margin: 0 auto; padding: 2rem; }

.profile-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    margin-bottom: 2rem;
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    border: 4px solid var(--primary-light);
    flex-shrink: 0;
}

.profile-info h1 { font-size: 1.75rem; font-weight: 700; color: var(--text-white); margin-bottom: 0.25rem; }
.profile-info .username { color: var(--text-gray); font-size: 1rem; margin-bottom: 0.5rem; }
.profile-info .role-badge {
    display: inline-block;
    padding: 0.35rem 1rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

/* Ana Sayfa İstatistik Kartları */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.25rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 12px;
    padding: 1.25rem 1rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #6366f1, #8b5cf6);
    opacity: 0;
    transition: opacity 0.3s;
}

.stat-card:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.2);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: inline-block;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.stat-label {
    color: var(--text-gray);
    font-size: 0.85rem;
    font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .stat-icon {
        font-size: 1.75rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    .profile-header { flex-direction: column; text-align: center; }
    .profile-stats { grid-template-columns: repeat(2, 1fr); }
}

/* TABLES */
.table-responsive { overflow-x: auto; border-radius: 16px; }

.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 1rem; text-align: left; border-bottom: 1px solid var(--border-color); }
.data-table th { background: var(--bg-card); color: var(--text-white); font-weight: 600; }
.data-table tbody tr:hover { background: var(--bg-card-hover); }
.data-table td { color: var(--text-light); }

/* BADGES */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.35rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-primary { background: rgba(99, 102, 241, 0.2); color: var(--primary-light); }
.badge-success { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.badge-danger { background: rgba(239, 68, 68, 0.2); color: #fca5a5; }
.badge-info { background: rgba(6, 182, 212, 0.2); color: #67e8f9; }

/* ALERTS */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: fadeInDown 0.5s ease-out;
}

.alert-success { background: rgba(16, 185, 129, 0.15); border: 1px solid rgba(16, 185, 129, 0.3); color: #6ee7b7; }
.alert-danger { background: rgba(239, 68, 68, 0.15); border: 1px solid rgba(239, 68, 68, 0.3); color: #fca5a5; }
.alert-warning { background: rgba(245, 158, 11, 0.15); border: 1px solid rgba(245, 158, 11, 0.3); color: #fbbf24; }
.alert-info { background: rgba(6, 182, 212, 0.15); border: 1px solid rgba(6, 182, 212, 0.3); color: #67e8f9; }

/* MODALS */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: 1rem;
}

.modal-overlay.active { display: flex; }

.modal {
    background: var(--bg-dark);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    animation: scaleIn 0.3s ease-out;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-title { font-size: 1.25rem; font-weight: 700; color: var(--text-white); }

.modal-close {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-card);
    color: var(--text-light);
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.25rem;
    transition: all 0.3s ease;
}

.modal-close:hover { background: var(--danger-color); color: white; transform: rotate(90deg); }

.modal-body { padding: 1.5rem; overflow-y: auto; max-height: 60vh; }
.modal-footer { display: flex; justify-content: flex-end; gap: 0.75rem; padding: 1rem 1.5rem; border-top: 1px solid var(--border-color); }

/* FOOTER */
.footer {
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--glass-border);
    padding: 3rem 2rem 1.5rem;
    margin-top: 4rem;
}

.footer-container { max-width: 1400px; margin: 0 auto; }

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 { font-size: 1.1rem; font-weight: 700; color: var(--text-white); margin-bottom: 1rem; }
.footer-section ul { list-style: none; }
.footer-section li { margin-bottom: 0.5rem; }
.footer-section a { color: var(--text-gray); text-decoration: none; transition: color 0.3s ease; }
.footer-section a:hover { color: var(--primary-color); }

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-gray);
}

/* LIVE CHAT */
.live-chat-btn {
    position: fixed;
    bottom: 100px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.4);
    z-index: 9998;
    transition: all 0.3s ease;
    animation: bounce 2s infinite;
}

.live-chat-btn:hover { transform: scale(1.1); box-shadow: 0 10px 30px rgba(99, 102, 241, 0.6); }

@media (max-width: 768px) {
    .live-chat-btn { bottom: 90px; right: 15px; width: 50px; height: 50px; font-size: 1.25rem; }
}

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

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

/* UTILITIES */
.text-center { text-align: center; }
.text-primary { color: var(--primary-color); }
.text-success { color: var(--success-color); }
.text-danger { color: var(--danger-color); }
.text-warning { color: var(--warning-color); }
.text-muted { color: var(--text-gray); }
.text-white { color: var(--text-white); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.d-flex { display: flex; }
.d-none { display: none; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.align-center { align-items: center; }
.w-100 { width: 100%; }

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

/* RESPONSIVE */
@media (max-width: 768px) {
    .hero { padding: 3rem 1rem; }
    .hero h1 { font-size: 2rem; }
    .hero-buttons { flex-direction: column; }
    .courses-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    body { font-size: 14px; }
    .btn { padding: 0.65rem 1.25rem; font-size: 0.9rem; }
    .card { padding: 1rem; border-radius: 16px; }
}