/* =============================================
   ADEEB TECHNOLOGY LAB - MAIN STYLESHEET
   Premium Institute Template
   ============================================= */

/* ========== CSS VARIABLES / THEME ========== */
:root {
    /* Light Theme (Default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.06), 0 2px 8px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.1), 0 8px 24px rgba(0,0,0,0.06);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);

    /* Brand Colors */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --primary-bg: rgba(99, 102, 241, 0.08);
    --secondary: #06b6d4;
    --accent: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
    --gradient-hero: linear-gradient(135deg, #6366f1 0%, #8b5cf6 30%, #06b6d4 70%, #10b981 100%);
    --gradient-card: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Space Grotesk', 'Inter', sans-serif;

    /* Spacing */
    --section-padding: 100px 0;
    --container-max: 1280px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* 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);

    /* Navbar */
    --navbar-bg: rgba(255, 255, 255, 0.85);
    --navbar-blur: blur(20px);
}

/* ========== DARK THEME ========== */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #1a2332;
    --bg-card: #1e293b;
    --bg-card-hover: #253348;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --border-light: #1e293b;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.4);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.25);
    --primary-bg: rgba(99, 102, 241, 0.15);
    --navbar-bg: rgba(15, 23, 42, 0.9);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

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

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

ul { list-style: none; }

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding);
}

/* ========== GRADIENT TEXT ========== */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    font-family: var(--font-primary);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    justify-content: center;
    white-space: nowrap;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;

    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

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

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* ========== SECTION HEADER ========== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========== NAVBAR ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: var(--navbar-bg);
    backdrop-filter: var(--navbar-blur);
    -webkit-backdrop-filter: var(--navbar-blur);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 10px 0;
    border-bottom-color: var(--border-color);
    box-shadow: var(--shadow-sm);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 101;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-name {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text-primary);
}

.logo-sub {
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--primary);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    transition: var(--transition);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Theme Toggle */
.theme-toggle {
    width: 42px;
    height: 42px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: rotate(30deg);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 101;
}

.hamburger span {
    width: 24px;
    height: 2.5px;
    background: var(--text-primary);
    border-radius: 4px;
    transition: var(--transition);
}

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

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

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

/* ========== HERO ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
    background: var(--bg-secondary);
}

.hero-bg-shapes .shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -200px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    bottom: -150px;
    left: -100px;
    animation: float 10s ease-in-out infinite reverse;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--accent);
    top: 40%;
    left: 40%;
    animation: float 6s ease-in-out infinite;
}

.shape-4 {
    width: 300px;
    height: 300px;
    background: #8b5cf6;
    top: 20%;
    right: 30%;
    animation: float 12s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-30px) scale(1.05); }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 24px;
    border: 1px solid rgba(99, 102, 241, 0.2);
    animation: fadeInDown 0.6s ease;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 20px;
    line-height: 1.15;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.7;
    max-width: 540px;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-stats {
    display: flex;
    gap: 32px;
    margin-bottom: 40px;
    animation: fadeInUp 0.6s ease 0.3s both;
}

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

.stat-number {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-number::after {
    content: '+';
    font-size: 1.2rem;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 2px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.4s both;
}

/* Hero Illustration */
.hero-illustration {
    position: relative;
    width: 100%;
    height: 450px;
}

.central-orb {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: #fff;
    box-shadow: 0 0 60px rgba(99, 102, 241, 0.4);
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 40px rgba(99, 102, 241, 0.3); transform: translate(-50%, -50%) scale(1); }
    50% { box-shadow: 0 0 80px rgba(99, 102, 241, 0.6); transform: translate(-50%, -50%) scale(1.05); }
}

.floating-card {
    position: absolute;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    animation: float-card 6s ease-in-out infinite;
}

.floating-card i {
    font-size: 1.2rem;
    color: var(--primary);
}

.fc-1 { top: 10%; left: 5%; animation-delay: 0s; }
.fc-2 { top: 5%; right: 10%; animation-delay: 1s; }
.fc-3 { bottom: 25%; left: 0%; animation-delay: 2s; }
.fc-4 { bottom: 10%; right: 5%; animation-delay: 3s; }
.fc-5 { top: 45%; right: 0%; animation-delay: 1.5s; }

@keyframes float-card {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

.hero-wave {
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    z-index: 1;
}

.hero-wave svg {
    display: block;
    width: 100%;
}

/* ========== ABOUT SECTION ========== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

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

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

.about-card-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: var(--primary-bg);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
    transition: var(--transition);
}

.about-card:hover .about-card-icon {
    background: var(--gradient-primary);
    color: #fff;
    transform: scale(1.1) rotate(5deg);
}

.about-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.about-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== COURSES SECTION ========== */
.courses {
    background: var(--bg-secondary);
}

/* Campus Filter */
.campus-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-btn.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.filter-count {
    background: rgba(255,255,255,0.2);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
}

.filter-btn:not(.active) .filter-count {
    background: var(--primary-bg);
    color: var(--primary);
}

/* Category Filter */
.category-filter {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.cat-btn {
    padding: 6px 18px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-family: var(--font-primary);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.cat-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
}

.cat-btn.active {
    background: var(--primary-bg);
    color: var(--primary);
    border-color: var(--primary);
}

/* ========== COURSE CARDS ========== */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-slow);
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    animation: cardAppear 0.5s ease forwards;
}

.course-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

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

.course-card:hover .course-card-shine {
    left: 120%;
}

@keyframes cardAppear {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Card Image */
.course-card-image {
    position: relative;
    height: 300px;
    overflow: hidden;
}

.course-card-image img {
    width: 100%;
    height: 100%;
    object-fit: fill;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.course-card-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60%;
    background: linear-gradient(to top, rgba(0,0,0,0.5) 0%, transparent 100%);
    pointer-events: none;
}

/* Shine effect */
.course-card-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    transition: left 0.8s ease;
    z-index: 2;
    pointer-events: none;
}

/* Badges on image */
.course-badges {
    position: absolute;
    top: 12px;
    left: 12px;
    right: 12px;
    display: flex;
    justify-content: space-between;
    z-index: 3;
}

.badge {
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-campus {
    background: rgba(99, 102, 241, 0.9);
    color: #fff;
}

.badge-campus-isb {
    background: rgba(16, 185, 129, 0.9);
    color: #fff;
}

.badge-discount {
    background: rgba(239, 68, 68, 0.9);
    color: #fff;
    animation: pulse-badge 2s ease-in-out infinite;
}

@keyframes pulse-badge {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

.badge-hot {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    color: #fff;
}

/* Course Duration Badge */
.course-duration {
    position: absolute;
    bottom: 12px;
    right: 12px;
    padding: 6px 14px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Card Body */
.course-card-body {
    padding: 24px;
    position: relative;
}

.course-category-tag {
    display: inline-block;
    padding: 3px 12px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 0.72rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.course-card-body h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
    color: var(--text-primary);
    transition: var(--transition);
    line-height: 1.35;
}

.course-card:hover .course-card-body h3 {
    color: var(--primary);
}

.course-card-body .course-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    max-height: calc(1.6em * 2);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.course-card-body .course-desc.expanded {
    display: block;
    overflow: visible;
    max-height: none;
}
.desc-toggle {
    background: transparent;
    border: none;
    color: var(--primary);
    padding: 4px 6px;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: -6px;
    margin-bottom: 10px;
    transition: var(--transition);
}
.desc-toggle:hover {
    color: var(--primary-dark);
}
.desc-toggle i {
    transition: transform 0.2s ease;
}
.desc-toggle.open i {
    transform: rotate(180deg);
}
.desc-toggle .desc-toggle-label {
    margin-right: 6px;
    font-size: 0.85rem;
    font-weight: 600;
}

.desc-modal {
    position: fixed;
    inset: 0;
    display: none;
    z-index: 2000;
}
.desc-modal.open {
    display: block;
}
.desc-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(2px);
}
.desc-modal-dialog {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: min(640px, 92vw);
    max-height: 72vh;
    overflow: auto;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: 24px 28px;
}
.desc-modal-title {
    font-size: 1.1rem;
    margin-bottom: 8px;
}
.desc-modal-content {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    white-space: pre-wrap;
}
.desc-modal-close {
    position: absolute;
    top: 10px;
    right: 12px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 6px;
}

/* Course Features */
.course-features {
    display: flex;
    gap: 16px;
    margin-bottom: 18px;
    flex-wrap: wrap;
}

.course-feature {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.course-feature i {
    color: var(--primary);
    font-size: 0.7rem;
}

/* Pricing Section */
.course-pricing {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 18px;
    border-top: 1px solid var(--border-color);
}

.price-wrapper {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.old-price {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: line-through;
    font-weight: 500;
}

.new-price {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.course-enroll-btn {
    padding: 10px 24px;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-full);
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
    position: relative;
    overflow: hidden;
}

.course-enroll-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.course-enroll-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.course-enroll-btn:hover::before {
    left: 100%;
}

/* Rating */
.course-rating {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 16px;
}

.course-rating i {
    color: #f59e0b;
    font-size: 0.75rem;
}

.course-rating span {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-left: 4px;
}

/* No Results */
.no-results {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
}

.no-results i {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.no-results h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

/* ========== CAMPUSES SECTION ========== */
.courses-showcase {
    background: var(--bg-secondary);
    padding-top: 80px;
    padding-bottom: 80px;
}

.courses-showcase-title {
    text-align: center;
    color: var(--text-primary);
    font-size: clamp(2rem, 3.5vw, 3rem);
    margin-bottom: 36px;
}

.courses-showcase-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(220px, 1fr));
    gap: 22px;
}

.course-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 34px 22px 30px;
    min-height: 182px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.course-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.course-box:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.course-box:hover::before {
    transform: scaleX(1);
}

.course-box-icon {
    font-size: 2rem;
    margin-bottom: 14px;
    transition: var(--transition);
    filter: drop-shadow(0 0 8px rgba(79, 70, 229, 0.22));
}

.course-box h3 {
    font-size: 1.15rem;
    margin-bottom: 4px;
    color: var(--text-primary);
    transition: var(--transition);
}

.course-box p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.course-box:hover .course-box-icon {
    transform: translateY(-2px) scale(1.08);
    filter: drop-shadow(0 0 14px rgba(79, 70, 229, 0.45));
}

.course-box:hover h3 {
    color: var(--primary-dark);
}

.course-box-icon.navy { color: #143f73; }
.course-box-icon.rose { color: #ff4c7d; }
.course-box-icon.violet { color: #8b5cf6; }
.course-box-icon.pink { color: #ec4899; }
.course-box-icon.amber { color: #f59e0b; }
.course-box-icon.steel { color: #173e74; }
.course-box-icon.gold { color: #eab308; }
.course-box-icon.purple { color: #9329b9; }
.course-box-icon.teal { color: #2f9b8f; }
.course-box-icon.sky { color: #5f83a7; }
.course-box-icon.orange { color: #f59e0b; }
.course-box-icon.green { color: #32c24d; }
.course-box-icon.deep { color: #153d73; }

.campuses-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.campus-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition);
}

.campus-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.campus-card-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.campus-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.campus-card:hover .campus-card-image img {
    transform: scale(1.08);
}

.campus-overlay {
    position: absolute;
    top: 12px;
    right: 12px;
}

.campus-tag {
    padding: 6px 16px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
}

.campus-card-body {
    padding: 28px;
}

.campus-card-body h3 {
    font-size: 1.3rem;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

.campus-card-body h3 i {
    color: var(--primary);
}

.campus-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.campus-info p {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.campus-info p i {
    color: var(--primary);
    width: 16px;
}

/* ========== TESTIMONIALS ========== */
.testimonials {
    background: var(--bg-secondary);
    overflow: hidden;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.testimonials-grid {
    display: block;
}

.testimonials-slider {
    position: relative;
}

.testimonials-controls {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 3;
}

.testimonial-arrow {
    width: 42px;
    height: 42px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: auto;
}

.testimonial-arrow-left {
    left: 0;
}

.testimonial-arrow-right {
    right: 0;
}

.testimonial-arrow:hover {
    color: #fff;
    background: var(--gradient-primary);
    border-color: transparent;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.25);
}

.testimonials-marquee {
    --testimonial-card-width: 340px;
    --testimonial-gap: 24px;
    overflow-x: auto;
    overflow-y: hidden;
    width: 100%;
    padding: 0 56px;
    scroll-behavior: smooth;
    scrollbar-width: none;
}

.testimonials-marquee::-webkit-scrollbar {
    display: none;
}

.testimonials-track {
    display: flex;
    gap: var(--testimonial-gap);
    margin: 40px 0;
    width: max-content;
}

.testimonial-card {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    outline: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 32px;
    transition: var(--transition);
    width: var(--testimonial-card-width);
    min-width: var(--testimonial-card-width);
    scroll-snap-align: start;
}

.testimonial-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.testimonial-stars {
    display: flex;
    gap: 3px;
    margin-bottom: 16px;
}

.testimonial-stars i {
    color: #f59e0b;
    font-size: 0.9rem;
}

.testimonial-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 0.9rem;
}

.testimonial-author h4 {
    font-size: 0.95rem;
    color: var(--text-primary);
}

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

/* ========== CONTACT ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: start;
}

.contact-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.contact-item p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.social-links {
    display: flex;
    gap: 10px;
    margin-top: 24px;
}

.social-link {
    width: 44px;
    height: 44px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    transform: translateY(-4px);
}

/* Contact Form */
.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 36px;
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ========== FOOTER ========== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-about p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 16px;
    line-height: 1.7;
}

.footer-logo {
    margin-bottom: 10px;
}

.footer-links-col h4 {
    font-size: 1rem;
    margin-bottom: 18px;
    color: var(--text-primary);
}

.footer-links-col ul li {
    margin-bottom: 10px;
}

.footer-links-col ul li a,
.footer-links-col ul li {
    font-size: 0.88rem;
    color: var(--text-secondary);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-links-col ul li a:hover {
    color: var(--primary);
    transform: translateX(4px);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ========== BACK TO TOP ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-full);
    font-size: 1rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Scroll Reveal */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos="fade-up"].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

[data-aos="fade-down"] {
    transform: translateY(-30px);
}

[data-aos="fade-down"].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="fade-right"].aos-animate {
    opacity: 1;
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="fade-left"].aos-animate {
    opacity: 1;
    transform: translateX(0);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-visual {
        display: none;
    }

    .hero-description {
        margin: 0 auto 36px;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .campuses-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }

    .courses-showcase-grid {
        grid-template-columns: repeat(3, minmax(200px, 1fr));
    }

    .testimonials-marquee {
        --testimonial-card-width: 320px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .section {
        padding: 70px 0;
    }

    /* Mobile Navigation */
    .nav-links {
        position: fixed;
        top: 0;
        bottom: 0;
        right: 0;
        width: min(340px, 86vw);
        height: 100vh;
        min-height: 100dvh;
        background: var(--bg-card);
        border-left: 1px solid var(--border-color);
        box-shadow: -12px 0 40px rgba(15, 23, 42, 0.18), 0 0 0 100vmax rgba(2, 6, 23, 0.35);
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        gap: 8px;
        padding: 96px 20px 28px;
        opacity: 0;
        visibility: hidden;
        transform: translateX(100%);
        transition: transform 0.32s ease, opacity 0.2s ease, visibility 0.2s ease;
        z-index: 100;
    }

    .nav-links.active {
        opacity: 1;
        visibility: visible;
        transform: translateX(0);
    }

    .nav-links .nav-link {
        display: block;
        font-size: 1.02rem;
        font-weight: 600;
        padding: 12px 14px;
        border-radius: 12px;
        border: 1px solid transparent;
    }

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

    .hamburger {
        display: flex;
    }

    .nav-cta {
        display: inline-flex;
        padding: 8px 14px;
        font-size: 0.8rem;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 20px;
    }

    .stat-item {
        flex: 0 0 calc(50% - 10px);
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .courses-grid {
        grid-template-columns: 1fr;
    }

    .testimonials-marquee {
        --testimonial-card-width: 285px;
        --testimonial-gap: 16px;
        padding: 0 44px;
    }

    .testimonials-controls {
        inset: 0;
    }

    .courses-showcase-grid {
        grid-template-columns: repeat(2, minmax(170px, 1fr));
        gap: 16px;
    }

    .course-box {
        min-height: 165px;
        padding: 26px 16px 24px;
    }

    .course-box h3 {
        font-size: 1rem;
    }

    .course-box p {
        font-size: 0.9rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        text-align: center;
        justify-content: center;
    }

    .campus-filter {
        flex-direction: column;
        align-items: center;
    }

    .category-filter {
        gap: 6px;
    }

    .cat-btn {
        padding: 5px 12px;
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .course-card-body {
        padding: 18px;
    }

    .new-price {
        font-size: 1.3rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

    .courses-showcase-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== SCROLL ANIMATIONS (Custom Intersection Observer) ========== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Card stagger animation */
.course-card:nth-child(1) { animation-delay: 0.05s; }
.course-card:nth-child(2) { animation-delay: 0.1s; }
.course-card:nth-child(3) { animation-delay: 0.15s; }
.course-card:nth-child(4) { animation-delay: 0.2s; }
.course-card:nth-child(5) { animation-delay: 0.25s; }
.course-card:nth-child(6) { animation-delay: 0.3s; }
.course-card:nth-child(7) { animation-delay: 0.35s; }
.course-card:nth-child(8) { animation-delay: 0.4s; }
.course-card:nth-child(9) { animation-delay: 0.45s; }
.course-card:nth-child(10) { animation-delay: 0.5s; }
.course-card:nth-child(11) { animation-delay: 0.55s; }
.course-card:nth-child(12) { animation-delay: 0.6s; }

/* ========== SPECIAL EFFECTS ========== */
/* Glassmorphism utility */
.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] .glass {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* ISB specific course card overrides */
.isb-tag {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.isb-price {
    background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.isb-enroll {
    background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
}

.isb-enroll:hover {
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

/* Selection style */
::selection {
    background: rgba(99, 102, 241, 0.3);
    color: var(--text-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}