/* ===========================
   DBMS Learning Platform - Professional Light Theme
   Smooth, User-Friendly, Responsive Design
   =========================== */

/* Mobile-first base reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

:root {
    /* Primary Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-bg: rgba(99, 102, 241, 0.1);
    
    /* Accent Colors */
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-teal: #14b8a6;
    --accent-orange: #f59e0b;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

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

/* ===========================
   Navigation - Glassmorphism
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-lg);
    border-bottom-color: var(--gray-200);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--gray-900);
    transition: var(--transition);
    flex-shrink: 0;
}

.nav-logo:hover {
    opacity: 0.9;
}

.nav-logo-img {
    height: 35px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
}

.nav-logo span {
    color: var(--gray-800);
    white-space: nowrap;
}

.nav-logo i {
    font-size: 1.75rem;
    background: linear-gradient(135deg, var(--primary), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    padding: 10px 18px;
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-700);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius);
    transition: var(--transition);
}

.nav-toggle:hover {
    background: var(--gray-100);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-container {
        padding: 0 12px;
        height: 60px;
    }
    
    .nav-logo-img {
        height: 32px;
    }
    
    .nav-logo {
        font-size: 1rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--gray-200);
        opacity: 0;
        transform: translateY(-10px);
        pointer-events: none;
        transition: var(--transition);
        box-shadow: var(--shadow-xl);
    }
    
    .nav-menu.active {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }
    
    .nav-link {
        padding: 14px 20px;
        border-radius: var(--radius-md);
    }
}

@media (max-width: 400px) {
    .nav-logo span {
        font-size: 0.9rem;
    }
    
    .nav-logo-img {
        height: 28px;
    }
    
    .nav-container {
        padding: 0 10px;
    }
}

/* ===========================
   Buttons - Modern Style
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.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: var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--white);
    color: var(--gray-700);
    border: 2px solid var(--gray-200);
    box-shadow: var(--shadow);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-module {
    background: var(--white);
    color: var(--primary);
    border: 2px solid var(--primary);
    width: 100%;
}

.btn-module:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

/* ===========================
   Hero Section - Impressive
   =========================== */
.hero {
    padding: 120px 20px 100px;
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 50%, var(--gray-100) 100%);
    position: relative;
    overflow: hidden;
}

/* Decorative Background Elements */
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse, rgba(99, 102, 241, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 50%;
    height: 100%;
    background: radial-gradient(ellipse, rgba(139, 92, 246, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--primary), var(--accent-purple));
    color: var(--white);
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 24px;
    animation: slideInUp 0.6s ease-out;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

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

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1.15;
    margin-bottom: 24px;
    animation: slideInUp 0.6s ease-out 0.1s both;
}

.hero-content h1 span {
    background: linear-gradient(135deg, var(--primary), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--gray-600);
    margin-bottom: 36px;
    max-width: 520px;
    line-height: 1.7;
    animation: slideInUp 0.6s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    animation: slideInUp 0.6s ease-out 0.3s both;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero Visual - Floating Cards Grid */
.hero-visual {
    position: relative;
    height: 500px;
    animation: fadeIn 1s ease-out 0.4s both;
}

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

.hero-cards {
    position: relative;
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(4, 1fr);
    gap: 16px;
    padding: 10px;
}

.floating-card {
    background: var(--white);
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--gray-700);
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.8);
    animation: floatCard 4s ease-in-out infinite;
}

.floating-card:hover {
    transform: translateY(-5px) scale(1.03);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-bg);
}

.floating-card i {
    font-size: 1.3rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
}

.floating-card span {
    flex: 1;
    white-space: nowrap;
}

/* Card Colors */
.card-1 i { color: var(--primary); background: var(--primary-bg); }
.card-2 i { color: var(--accent-purple); background: rgba(139, 92, 246, 0.1); }
.card-3 i { color: var(--accent-pink); background: rgba(236, 72, 153, 0.1); }
.card-4 i { color: var(--accent-teal); background: rgba(20, 184, 166, 0.1); }
.card-5 i { color: var(--accent-orange); background: rgba(245, 158, 11, 0.1); }
.card-6 i { color: var(--accent-green); background: rgba(16, 185, 129, 0.1); }
.card-7 i { color: var(--accent-red); background: rgba(239, 68, 68, 0.1); }
.card-8 i { color: var(--accent-blue); background: rgba(59, 130, 246, 0.1); }

/* Animation Delays */
.card-1 { animation-delay: 0s; }
.card-2 { animation-delay: 0.5s; }
.card-3 { animation-delay: 1s; }
.card-4 { animation-delay: 1.5s; }
.card-5 { animation-delay: 2s; }
.card-6 { animation-delay: 2.5s; }
.card-7 { animation-delay: 3s; }
.card-8 { animation-delay: 3.5s; }

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* Hero Responsive */
@media (max-width: 1024px) {
    .hero-container {
        gap: 40px;
    }
    
    .hero-content h1 {
        font-size: 2.75rem;
    }
}

@media (max-width: 900px) {
    .hero {
        padding: 100px 16px 50px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-content h1 {
        font-size: 2.25rem;
    }
    
    .hero-content p {
        margin-left: auto;
        margin-right: auto;
        padding: 0 10px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-visual {
        height: 350px;
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 12px 40px;
    }
    
    .hero-content h1 {
        font-size: 1.75rem;
        line-height: 1.2;
    }
    
    .hero-content p {
        font-size: 0.95rem;
        line-height: 1.6;
    }
    
    .hero-badge {
        padding: 8px 14px;
        font-size: 0.8rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        padding: 0 10px;
    }
    
    .btn {
        width: 100%;
        max-width: 100%;
        justify-content: center;
    }
    
    .hero-visual {
        height: 280px;
        display: none;
    }
    
    .floating-card {
        padding: 10px 12px;
        font-size: 0.75rem;
    }
}

@media (max-width: 360px) {
    .hero-content h1 {
        font-size: 1.5rem;
    }
    
    .hero-content p {
        font-size: 0.9rem;
    }
    
    .hero-badge {
        font-size: 0.75rem;
        padding: 6px 12px;
    }
}

/* ===========================
   Quick Access Section
   =========================== */
.quick-access {
    padding: 100px 20px;
    background: var(--white);
    position: relative;
}

.quick-access h2,
.modules h2,
.about h2 {
    text-align: center;
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.section-subtitle {
    text-align: center;
    color: var(--gray-500);
    font-size: 1.1rem;
    margin-bottom: 50px;
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.quick-card {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 24px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.quick-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent, var(--primary));
    transform: scaleY(0);
    transition: var(--transition);
}

.quick-card:hover {
    background: var(--white);
    border-color: transparent;
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.quick-card:hover::before {
    transform: scaleY(1);
}

.quick-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent), transparent);
    background-color: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
}

.quick-card:hover .quick-icon {
    transform: scale(1.1);
}

.quick-icon i {
    font-size: 1.4rem;
    color: var(--accent, var(--primary));
}

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

.quick-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.quick-info h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 4px 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.quick-info p {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.quick-arrow {
    color: var(--gray-400);
    font-size: 1rem;
    transition: var(--transition);
}

.quick-card:hover .quick-arrow {
    color: var(--primary);
    transform: translateX(6px);
}

@media (max-width: 768px) {
    .quick-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-access {
        padding: 50px 12px;
    }
    
    .quick-access h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .quick-grid {
        gap: 10px;
    }
    
    .quick-card {
        padding: 14px 12px;
        gap: 10px;
    }
    
    .quick-icon {
        width: 40px;
        height: 40px;
        min-width: 40px;
    }
    
    .quick-icon i {
        font-size: 1rem;
    }
    
    .quick-info h3 {
        font-size: 0.9rem;
        white-space: normal;
    }
    
    .quick-info p {
        font-size: 0.75rem;
    }
    
    .quick-label {
        font-size: 0.65rem;
        padding: 2px 6px;
    }
    
    .quick-access h2 {
        font-size: 1.4rem;
    }
    
    .section-subtitle {
        font-size: 0.85rem;
        margin-bottom: 25px;
        padding: 0 10px;
    }
    
    .quick-arrow {
        display: none;
    }
}

@media (max-width: 360px) {
    .quick-card {
        padding: 12px 10px;
    }
    
    .quick-info h3 {
        font-size: 0.85rem;
    }
}

/* ===========================
   Modules Section
   =========================== */
.modules {
    padding: 100px 20px;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--gray-100) 100%);
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.module-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 32px;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent-purple));
    transform: scaleX(0);
    transition: var(--transition);
}

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

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

.module-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.module-number {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary);
    background: linear-gradient(135deg, var(--primary-bg), rgba(139, 92, 246, 0.1));
    padding: 8px 14px;
    border-radius: var(--radius);
}

.module-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-500);
    background: var(--gray-100);
    padding: 6px 12px;
    border-radius: var(--radius-full);
}

.module-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--accent-purple));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
    transition: var(--transition);
}

.module-card:hover .module-icon {
    transform: scale(1.05) rotate(3deg);
}

.module-icon i {
    font-size: 1.75rem;
    color: var(--white);
}

.module-card h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.module-card > p {
    font-size: 0.95rem;
    color: var(--gray-600);
    margin-bottom: 24px;
    line-height: 1.7;
}

.module-features {
    list-style: none;
    margin-bottom: 28px;
}

.module-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-size: 0.9rem;
    color: var(--gray-600);
    border-bottom: 1px solid var(--gray-100);
}

.module-features li:last-child {
    border-bottom: none;
}

.module-features li i {
    color: var(--accent-green);
    font-size: 0.85rem;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 50%;
}

@media (max-width: 768px) {
    .modules-grid {
        grid-template-columns: 1fr;
    }
    
    .module-card {
        padding: 20px;
    }
    
    .modules {
        padding: 50px 12px;
    }
    
    .modules h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .modules-grid {
        gap: 12px;
    }
    
    .module-card {
        padding: 16px;
    }
    
    .module-header {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .module-icon {
        width: 40px;
        height: 40px;
    }
    
    .module-icon i {
        font-size: 1rem;
    }
    
    .module-badge {
        padding: 3px 6px;
        font-size: 0.6rem;
    }
    
    .module-card h3 {
        font-size: 0.95rem;
    }
    
    .module-card p {
        font-size: 0.8rem;
        line-height: 1.5;
    }
    
    .modules h2 {
        font-size: 1.4rem;
    }
    
    .module-features {
        margin-bottom: 20px;
    }
    
    .module-features li {
        padding: 8px 0;
        font-size: 0.8rem;
        gap: 8px;
    }
    
    .module-features li i {
        width: 16px;
        height: 16px;
        font-size: 0.7rem;
    }
    
    .btn-module {
        padding: 10px 16px;
        font-size: 0.85rem;
    }
}

@media (max-width: 360px) {
    .module-card {
        padding: 14px;
    }
    
    .module-card h3 {
        font-size: 0.9rem;
    }
}

/* ===========================
   About Section
   =========================== */
.about {
    padding: 100px 20px;
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-content h2 {
    text-align: left;
    margin-bottom: 20px;
}

.about-content p {
    color: var(--gray-600);
    font-size: 1.1rem;
    margin-bottom: 40px;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 50px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--gray-500);
    font-weight: 500;
    margin-top: 5px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.feature-card {
    background: var(--gray-50);
    padding: 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.feature-card:hover {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
    border-color: var(--primary-bg);
}

.feature-card i {
    font-size: 2.25rem;
    background: linear-gradient(135deg, var(--primary), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 18px;
}

.feature-card h4 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--gray-500);
}

@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .about-content h2 {
        text-align: center;
    }
    
    .about-content p {
        text-align: center;
    }
    
    .about-stats {
        justify-content: center;
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        gap: 20px;
    }
    
    .stat-item {
        padding: 15px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: linear-gradient(180deg, var(--gray-900) 0%, #0f172a 100%);
    color: var(--gray-300);
    padding: 80px 20px 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 50px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 18px;
}

.footer-logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.footer-author {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--gray-700);
}

.footer-author p {
    font-size: 0.95rem;
    color: var(--gray-400);
}

.footer-author strong {
    color: var(--primary-light);
    font-weight: 600;
}

.footer-brand p {
    max-width: 320px;
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-links h4 {
    color: var(--white);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.footer-links a:hover {
    color: var(--white);
    transform: translateX(5px);
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: 30px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--gray-500);
}

.footer-bottom strong {
    color: var(--primary-light);
    font-weight: 600;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 30px;
    }
    
    .footer-brand p {
        margin: 0 auto;
    }
    
    .footer-links a:hover {
        transform: none;
    }
    
    .footer {
        padding: 50px 16px 30px;
    }
    
    .footer-logo {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .footer {
        padding: 40px 12px 20px;
    }
    
    .footer-content {
        gap: 25px;
    }
    
    .footer-logo {
        font-size: 1.1rem;
    }
    
    .footer-logo-img {
        height: 32px;
    }
    
    .footer-brand p {
        font-size: 0.85rem;
    }
    
    .footer-links h4 {
        font-size: 0.95rem;
        margin-bottom: 12px;
    }
    
    .footer-links a {
        font-size: 0.8rem;
    }
    
    .footer-links li {
        margin-bottom: 8px;
    }
    
    .footer-bottom {
        padding-top: 20px;
        font-size: 0.75rem;
    }
    
    .footer-author p {
        font-size: 0.85rem;
    }
}

/* ===========================
   Scroll Reveal Animation
   =========================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

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

/* ===========================
   Scrollbar Styling
   =========================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* ===========================
   Selection Styling
   =========================== */
::selection {
    background: var(--primary);
    color: var(--white);
}

/* ===========================
   Focus States for Accessibility
   =========================== */
a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--primary-light);
    outline-offset: 2px;
}

/* ===========================
   Extra Small Devices (360px)
   =========================== */
@media (max-width: 360px) {
    .hero-content h1 {
        font-size: 1.75rem;
    }
    
    .hero-badge {
        padding: 8px 14px;
        font-size: 0.75rem;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 0.85rem;
    }
    
    .quick-card {
        padding: 16px;
        gap: 12px;
    }
    
    .quick-icon {
        width: 45px;
        height: 45px;
    }
    
    .quick-info h3 {
        font-size: 0.95rem;
    }
    
    .section-subtitle {
        font-size: 0.95rem;
        margin-bottom: 30px;
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
    
    .footer {
        padding: 50px 15px 30px;
    }
    
    .footer-logo {
        font-size: 1.1rem;
    }
}

/* ===========================
   Touch Device Optimizations
   =========================== */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets */
    .btn {
        min-height: 48px;
        padding: 14px 24px;
    }
    
    .nav-link {
        min-height: 44px;
        padding: 12px 16px;
    }
    
    .quick-card {
        min-height: 80px;
    }
    
    .module-card {
        min-height: auto;
    }
    
    /* Disable hover effects that don't work on touch */
    .module-card:hover {
        transform: none;
    }
    
    .quick-card:hover .quick-arrow {
        transform: none;
    }
    
    .floating-card {
        animation: none;
    }
    
    /* Better scrolling */
    .nav-menu {
        -webkit-overflow-scrolling: touch;
    }
}

/* ===========================
   Landscape Mode on Mobile
   =========================== */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        padding: 100px 20px 40px;
        min-height: auto;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-visual {
        display: none;
    }
    
    .navbar {
        padding: 8px 0;
    }
    
    .nav-container {
        height: 55px;
    }
}

/* ===========================
   High Contrast Mode
   =========================== */
@media (prefers-contrast: high) {
    .module-card {
        border-width: 2px;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .quick-card {
        border: 2px solid var(--gray-300);
    }
}

/* ===========================
   Reduced Motion
   =========================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .floating-card {
        animation: none;
    }
    
    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* ===========================
   Print Styles
   =========================== */
@media print {
    .navbar,
    .hero-visual,
    .nav-toggle,
    .footer {
        display: none;
    }
    
    .hero {
        padding: 20px;
        min-height: auto;
    }
    
    .module-card,
    .quick-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}