/* ==========================================
   Optima Learning Platform - World-Class Design
   Professional, Modern & Sophisticated
   ========================================== */

:root {
    /* Primary Colors */
    --primary-color: #17a2b8;
    --primary-dark: #138496;
    --primary-light: #5bc0de;
    
    /* Neutral Colors */
    --white: #ffffff;
    --black: #000000;
    --gray-50: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    /* Status Colors */
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================
   Reset & Base Styles
   ========================================== */

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

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--gray-800);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
}

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

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

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

.img-fluid {
    width: 100%;
    height: auto;
}

.rounded-lg {
    border-radius: var(--radius-xl);
}

/* ==========================================
   Typography
   ========================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

/* ==========================================
   Top Bar
   ========================================== */

.top-bar {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-sm) 0;
    font-size: 0.875rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.top-bar-left,
.top-bar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.top-bar-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray-400);
    font-size: 0.875rem;
    transition: var(--transition);
}

.top-bar-link:hover {
    color: var(--white);
}

.top-bar-link i {
    font-size: 0.75rem;
    color: var(--primary-color);
}

.top-bar-text {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray-400);
}

.top-bar-text i {
    color: var(--primary-color);
}

.top-bar-divider {
    width: 1px;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
}

/* ==========================================
   Header & Navigation
   ========================================== */

.main-header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--gray-200);
}

.navbar {
    padding: var(--spacing-md) 0;
}

.navbar-brand {
    padding: 0;
    margin-right: var(--spacing-2xl);
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.brand-logo img {
    height: 40px;
    width: auto;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.brand-tagline {
    font-size: 0.625rem;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.nav-link {
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.9375rem;
    position: relative;
    transition: var(--transition);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

.nav-link-icon {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.mega-menu {
    min-width: 250px;
    padding: var(--spacing-md);
}

.mega-menu .dropdown-item {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.9375rem;
    transition: var(--transition);
    margin-bottom: var(--spacing-xs);
}

.mega-menu .dropdown-item:hover {
    background: var(--gray-50);
    color: var(--primary-color);
    transform: translateX(4px);
}

.mega-menu .dropdown-item i {
    font-size: 1.125rem;
    color: var(--primary-color);
    width: 24px;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    background: var(--gray-50);
    transition: var(--transition);
}

.user-menu:hover {
    background: var(--gray-100);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 0.875rem;
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--gray-800);
}

.dropdown-menu {
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    min-width: 220px;
}

.dropdown-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9375rem;
    transition: var(--transition);
    color: var(--gray-700);
}

.dropdown-item:hover {
    background: var(--gray-50);
    color: var(--gray-900);
}

.dropdown-item i {
    width: 20px;
    font-size: 1rem;
}

.dropdown-divider {
    margin: var(--spacing-sm) 0;
    opacity: 0.5;
}

/* ==========================================
   Buttons
   ========================================== */

.btn {
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    line-height: 1.5;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    box-shadow: 0 4px 12px rgba(23, 162, 184, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(23, 162, 184, 0.4);
    color: var(--white);
}

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

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(23, 162, 184, 0.3);
}

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

.btn-outline-light:hover {
    background: var(--white);
    color: var(--gray-900);
}

.btn-light {
    background: var(--white);
    color: var(--gray-900);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-light:hover {
    background: var(--gray-50);
    color: var(--gray-900);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.btn-lg {
    padding: 1.125rem 2.5rem;
    font-size: 1rem;
}

.btn-hero {
    padding: 1.25rem 2.75rem;
    font-size: 1.0625rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
}

.btn-header {
    padding: 0.625rem 1.5rem;
    font-size: 0.9375rem;
}

.btn-course {
    width: 100%;
    padding: 0.875rem;
    background: var(--gray-900);
    color: var(--white);
    font-weight: 600;
}

.btn-course:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* ==========================================
   Hero Section
   ========================================== */

.hero-section {
    padding: var(--spacing-4xl) 0;
    position: relative;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

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

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-between(135deg, 
        rgba(23, 162, 184, 0.95) 0%, 
        rgba(19, 132, 150, 0.9) 100%);
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 700px;
}

.hero-badge-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--white);
    transition: var(--transition);
}

.hero-badge:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.hero-badge i {
    font-size: 1rem;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
    color: var(--white);
    letter-spacing: -0.02em;
}

.highlight-text {
    display: block;
    color: rgba(255, 255, 255, 0.9);
    font-family: var(--font-display);
    font-style: italic;
}

.hero-description {
    font-size: 1.25rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-2xl);
    font-weight: 400;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.hero-trust {
    padding: var(--spacing-xl) 0;
}

.trust-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
}

.trust-stat-item {
    text-align: center;
}

.trust-stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.trust-stat-label {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

.trust-stat-divider {
    width: 1px;
    height: 50px;
    background: rgba(255, 255, 255, 0.3);
}

/* Hero Card Stack */
.hero-card-stack {
    position: relative;
    height: 500px;
}

.hero-floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    min-width: 280px;
    transition: var(--transition-slow);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-floating-card:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.3);
}

.hero-floating-card.card-1 {
    top: 50px;
    right: 50px;
    animation: float 6s ease-in-out infinite;
}

.hero-floating-card.card-2 {
    top: 200px;
    right: 150px;
    animation: float 6s ease-in-out infinite 2s;
}

.hero-floating-card.card-3 {
    top: 350px;
    right: 80px;
    animation: float 6s ease-in-out infinite 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.75rem;
    flex-shrink: 0;
}

.card-content {
    flex: 1;
}

.card-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.card-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

/* ==========================================
   Partners Section
   ========================================== */

.partners-section {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
}

.partners-intro {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.partners-text {
    font-size: 0.9375rem;
    color: var(--gray-600);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
}

.partners-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-2xl);
}

.partner-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    color: var(--gray-700);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: var(--transition);
}

.partner-badge:hover {
    background: var(--white);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.partner-badge i {
    font-size: 1.25rem;
    color: var(--primary-color);
}

/* ==========================================
   Section Headers
   ========================================== */

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: var(--spacing-3xl);
    gap: var(--spacing-xl);
}

.section-header-content {
    flex: 1;
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-lg);
    background: var(--primary-color);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 0;
    line-height: 1.7;
}

.section-header-center {
    text-align: center;
    max-width: 750px;
    margin: 0 auto var(--spacing-3xl);
}

/* ==========================================
   Categories Section
   ========================================== */

.categories-section {
    padding: var(--spacing-4xl) 0;
    background: var(--gray-50);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.category-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 2px solid var(--gray-200);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    text-decoration: none;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.category-icon {
    width: 72px;
    height: 72px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    transition: var(--transition);
}

.category-card:hover .category-icon {
    background: var(--primary-color);
    transform: scale(1.1);
}

.category-icon i {
    font-size: 2rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.category-card:hover .category-icon i {
    color: var(--white);
}

.category-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
}

.category-description {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    flex: 1;
}

.category-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: var(--transition);
}

.category-card:hover .category-link {
    gap: var(--spacing-md);
}

/* ==========================================
   Courses Section
   ========================================== */

.courses-section {
    padding: var(--spacing-4xl) 0;
    background: var(--white);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--spacing-2xl);
}

.course-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: var(--primary-color);
}

.course-image {
    position: relative;
    height: 240px;
    overflow: hidden;
    background: var(--gray-100);
}

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

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

.course-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-between(to bottom, transparent, rgba(0, 0, 0, 0.3));
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--spacing-lg);
}

.course-level-badge {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--white);
    color: var(--gray-900);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    box-shadow: var(--shadow-md);
}

.course-content {
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.course-meta-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.course-category {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8125rem;
    color: var(--primary-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.course-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
}

.course-rating i {
    color: var(--warning);
}

.course-title {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
    color: var(--gray-900);
}

.course-description {
    color: var(--gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    flex: 1;
}

.course-meta {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--gray-200);
    margin-bottom: var(--spacing-lg);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

.meta-item i {
    color: var(--primary-color);
    font-size: 1rem;
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
}

.course-price {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary-color);
    white-space: nowrap;
}

/* ==========================================
   Why Choose Section
   ========================================== */

.why-choose-section {
    padding: var(--spacing-4xl) 0;
    background: var(--white);
}

.why-choose-image {
    position: relative;
}

.why-choose-image img {
    box-shadow: var(--shadow-xl);
}

.image-badge {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 180px;
    height: 180px;
    background: var(--primary-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-2xl);
    border: 8px solid var(--white);
}

.badge-content {
    text-align: center;
    color: var(--white);
}

.badge-number {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.badge-text {
    font-size: 0.875rem;
    font-weight: 600;
}

.why-choose-content {
    padding-left: var(--spacing-3xl);
}

.why-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.why-feature-item {
    display: flex;
    gap: var(--spacing-lg);
}

.feature-icon-box {
    width: 56px;
    height: 56px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
}

.why-feature-item:hover .feature-icon-box {
    background: var(--primary-color);
    transform: scale(1.1);
}

.feature-icon-box i {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.why-feature-item:hover .feature-icon-box i {
    color: var(--white);
}

.feature-content h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
}

.feature-content p {
    color: var(--gray-600);
    line-height: 1.6;
    margin: 0;
}

/* ==========================================
   Stats Section
   ========================================== */

.stats-section {
    padding: var(--spacing-4xl) 0;
    position: relative;
    overflow: hidden;
}

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

.stats-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.stats-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-between(135deg, 
        rgba(33, 37, 41, 0.95) 0%, 
        rgba(52, 58, 64, 0.9) 100%);
}

.stats-section .container {
    position: relative;
    z-index: 1;
}

.stat-card {
    text-align: center;
    padding: var(--spacing-2xl);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    transition: var(--transition);
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.2);
}

.stat-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: rgba(23, 162, 184, 0.2);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(23, 162, 184, 0.4);
    transition: var(--transition);
}

.stat-card:hover .stat-icon {
    background: rgba(23, 162, 184, 0.3);
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.stat-icon i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.stat-content {
    color: var(--white);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-text {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.stat-subtext {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ==========================================
   Testimonials Section
   ========================================== */

.testimonials-section {
    padding: var(--spacing-4xl) 0;
    background: var(--gray-50);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
}

.testimonial-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.testimonial-rating {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
}

.testimonial-rating i {
    color: var(--warning);
    font-size: 1.125rem;
}

.testimonial-text {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--gray-700);
    margin-bottom: var(--spacing-xl);
    flex: 1;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
}

.author-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.author-info {
    flex: 1;
}

.author-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.author-title {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* ==========================================
   CTA Section
   ========================================== */

.cta-section {
    padding: var(--spacing-4xl) 0;
    position: relative;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

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

.cta-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cta-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-between(135deg, 
        rgba(23, 162, 184, 0.95) 0%, 
        rgba(19, 132, 150, 0.9) 100%);
}

.cta-section .container {
    position: relative;
    z-index: 1;
}

.cta-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.cta-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-xl);
}

.cta-badge i {
    font-size: 1.25rem;
}

.cta-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.cta-description {
    font-size: 1.25rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-2xl);
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    flex-wrap: wrap;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9375rem;
    font-weight: 500;
}

.cta-feature i {
    font-size: 1.25rem;
    color: var(--white);
}

/* ==========================================
   Footer
   ========================================== */

.main-footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-brand {
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.footer-logo img {
    height: 40px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-logo span {
    font-size: 1.5rem;
    font-weight: 800;
}

.footer-description {
    color: var(--gray-400);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    max-width: 400px;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 44px;
    height: 44px;
    background: var(--gray-800);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition);
    border: 1px solid var(--gray-700);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-4px);
    color: var(--white);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--white);
}

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

.footer-links li {
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: var(--gray-400);
    transition: var(--transition);
    font-size: 0.9375rem;
    display: inline-block;
}

.footer-links a:hover {
    color: var(--white);
    padding-left: var(--spacing-sm);
}

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

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    color: var(--gray-400);
    font-size: 0.9375rem;
}

.footer-contact i {
    color: var(--primary-color);
    margin-top: 2px;
    font-size: 1.125rem;
}

.footer-website {
    margin-top: var(--spacing-xl);
}

.website-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gray-800);
    color: var(--white);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 600;
    transition: var(--transition);
    border: 1px solid var(--gray-700);
}

.website-link:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.footer-bottom {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--gray-800);
}

.footer-copyright {
    color: var(--gray-500);
    margin: 0;
    font-size: 0.9375rem;
}

.footer-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    justify-content: center;
}

.footer-meta-link {
    color: var(--gray-500);
    font-size: 0.9375rem;
    transition: var(--transition);
}

.footer-meta-link:hover {
    color: var(--white);
}

.footer-divider {
    color: var(--gray-700);
}

.admin-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

/* ==========================================
   Alerts
   ========================================== */

.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    margin-bottom: var(--spacing-lg);
    font-size: 0.9375rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-color: var(--success);
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border-color: var(--danger);
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-color: var(--warning);
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-color: var(--info);
}

/* ==========================================
   Empty State
   ========================================== */

.empty-state {
    text-align: center;
    padding: var(--spacing-4xl);
    grid-column: 1 / -1;
}

.empty-state i {
    font-size: 5rem;
    color: var(--gray-300);
    margin-bottom: var(--spacing-xl);
}

.empty-state h3 {
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
    font-size: 1.75rem;
}

.empty-state p {
    color: var(--gray-600);
    margin: 0;
    font-size: 1.0625rem;
}

/* ==========================================
   Responsive Design
   ========================================== */

@media (max-width: 1200px) {
    .hero-title {
        font-size: 3.5rem;
    }
    
    .section-title {
        font-size: 2.25rem;
    }
    
    .hero-card-stack {
        height: 400px;
    }
    
    .hero-floating-card {
        min-width: 240px;
    }
}

@media (max-width: 992px) {
    .top-bar-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .top-bar-left,
    .top-bar-right {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .trust-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .trust-stat-divider {
        width: 100%;
        height: 1px;
    }
    
    .hero-card-stack {
        display: none;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .why-choose-content {
        padding-left: 0;
        margin-top: var(--spacing-3xl);
    }
    
    .image-badge {
        bottom: 20px;
        right: 20px;
        width: 140px;
        height: 140px;
    }
    
    .badge-number {
        font-size: 2rem;
    }
    
    .cta-actions {
        flex-direction: column;
    }
    
    .cta-actions .btn {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .top-bar {
        display: none;
    }
    
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.875rem; }
    h3 { font-size: 1.5rem; }
    
    .hero-section {
        padding: var(--spacing-3xl) 0;
        min-height: auto;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-badge-group {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .partners-grid {
        gap: var(--spacing-md);
    }
    
    .partner-badge {
        font-size: 0.8125rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .categories-grid,
    .courses-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-description {
        font-size: 1rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .cta-description {
        font-size: 1rem;
    }
    
    .cta-features {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .footer-meta {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .footer-divider {
        display: none;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 1.875rem;
    }
    
    .trust-stat-number {
        font-size: 2rem;
    }
    
    .why-feature-item {
        flex-direction: column;
        text-align: center;
    }
    
    .feature-icon-box {
        margin: 0 auto;
    }
}

/* ==========================================
   Utilities
   ========================================== */

.text-center { text-align: center; }
.text-muted { color: var(--gray-600); }

.mt-3 { margin-top: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-2xl); }
.ms-2 { margin-left: var(--spacing-sm); }

.py-5 { padding: var(--spacing-2xl) 0; }

/* Loading Spinner */
.spinner {
    border: 3px solid var(--gray-300);
    border-top-color: var(--primary-color);
    border-radius: var(--radius-full);
    width: 48px;
    height: 48px;
    animation: spin 1s linear infinite;
    margin: var(--spacing-2xl) auto;
}

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