/*
================================================================================
  Text Classification Dataset - Stylesheet
================================================================================
  Project: Text Classification Dataset
  Category: Text Data / NLP
  
  Author: Molla Samser
  Designer & Tester: Rima Khatun
  Website: https://rskworld.in
  Email: help@rskworld.in | support@rskworld.in
  Phone: +91 93305 39277
  
  Copyright (c) 2026 RSK World - All Rights Reserved
  
  Created: December 2026
================================================================================
*/

/* ===== CSS Variables ===== */
:root {
    /* Primary Colors - Deep Crimson Theme */
    --primary: #dc2626;
    --primary-dark: #b91c1c;
    --primary-light: #f87171;
    --primary-glow: rgba(220, 38, 38, 0.3);
    
    /* Secondary Colors */
    --secondary: #1e1b4b;
    --secondary-light: #312e81;
    
    /* Accent Colors */
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    
    /* Neutral Colors */
    --dark: #0f0a1f;
    --dark-surface: #1a1333;
    --dark-card: #231d3a;
    --dark-border: #352d54;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #a5a3b8;
    --text-muted: #6b6882;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    --gradient-dark: linear-gradient(180deg, var(--dark) 0%, var(--dark-surface) 100%);
    --gradient-card: linear-gradient(145deg, var(--dark-card) 0%, var(--dark-surface) 100%);
    --gradient-glow: radial-gradient(ellipse at center, var(--primary-glow) 0%, transparent 70%);
    
    /* Category Colors */
    --cat-tech: #3b82f6;
    --cat-sports: #22c55e;
    --cat-politics: #8b5cf6;
    --cat-entertainment: #ec4899;
    --cat-business: #f59e0b;
    --cat-science: #06b6d4;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 40px var(--primary-glow);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Source Sans 3', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ===== Background Animation ===== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: var(--gradient-dark);
}

.bg-animation::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 10%;
    width: 500px;
    height: 500px;
    background: var(--gradient-glow);
    filter: blur(100px);
    animation: float 15s ease-in-out infinite;
}

.bg-animation::after {
    content: '';
    position: absolute;
    bottom: 20%;
    right: 10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(ellipse at center, rgba(245, 158, 11, 0.2) 0%, transparent 70%);
    filter: blur(80px);
    animation: float 20s ease-in-out infinite reverse;
}

.floating-shapes span {
    position: absolute;
    display: block;
    width: 20px;
    height: 20px;
    background: rgba(220, 38, 38, 0.1);
    border: 1px solid rgba(220, 38, 38, 0.2);
    animation: floating 25s infinite linear;
    bottom: -150px;
}

.floating-shapes span:nth-child(1) { left: 10%; width: 80px; height: 80px; animation-delay: 0s; }
.floating-shapes span:nth-child(2) { left: 20%; width: 30px; height: 30px; animation-delay: 2s; animation-duration: 12s; }
.floating-shapes span:nth-child(3) { left: 35%; width: 60px; height: 60px; animation-delay: 4s; }
.floating-shapes span:nth-child(4) { left: 50%; width: 45px; height: 45px; animation-delay: 0s; animation-duration: 18s; }
.floating-shapes span:nth-child(5) { left: 65%; width: 25px; height: 25px; animation-delay: 0s; }
.floating-shapes span:nth-child(6) { left: 75%; width: 70px; height: 70px; animation-delay: 3s; }
.floating-shapes span:nth-child(7) { left: 82%; width: 50px; height: 50px; animation-delay: 7s; }
.floating-shapes span:nth-child(8) { left: 88%; width: 35px; height: 35px; animation-delay: 15s; animation-duration: 45s; }
.floating-shapes span:nth-child(9) { left: 5%; width: 40px; height: 40px; animation-delay: 2s; animation-duration: 35s; }
.floating-shapes span:nth-child(10) { left: 45%; width: 55px; height: 55px; animation-delay: 0s; animation-duration: 20s; }

@keyframes floating {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 0;
        border-radius: 0;
    }
    10% {
        opacity: 0.5;
    }
    90% {
        opacity: 0.5;
    }
    100% {
        transform: translateY(-1500px) rotate(720deg);
        opacity: 0;
        border-radius: 50%;
    }
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(50px, -50px) scale(1.1);
    }
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ===== Header & Navigation ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(15, 10, 31, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--dark-border);
    transition: var(--transition-base);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.logo i {
    font-size: 1.75rem;
    color: var(--primary);
}

.logo .highlight {
    color: var(--primary);
}

.logo:hover {
    transform: scale(1.02);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a.nav-highlight {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    padding: 8px 16px;
    border-radius: var(--radius-full);
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 0 20px var(--primary-glow);
    transition: var(--transition-base);
}

.nav-links a.nav-highlight:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 25px var(--primary-glow);
}

.nav-links a.nav-highlight::after {
    display: none;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(220, 38, 38, 0.15);
    border: 1px solid rgba(220, 38, 38, 0.3);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--primary-light);
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease forwards;
}

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

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease 0.1s forwards;
    opacity: 0;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease 0.2s forwards;
    opacity: 0;
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease 0.3s forwards;
    opacity: 0;
}

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

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    animation: fadeInUp 0.6s ease 0.4s forwards;
    opacity: 0;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md), 0 0 20px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px var(--primary-glow);
}

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

.btn-outline:hover {
    background: var(--dark-card);
    border-color: var(--primary);
    color: var(--primary-light);
}

/* ===== Code Window ===== */
.hero-visual {
    animation: fadeInRight 0.8s ease 0.3s forwards;
    opacity: 0;
}

.code-window {
    background: var(--dark-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--dark-border);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.window-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--dark-surface);
    border-bottom: 1px solid var(--dark-border);
}

.window-dots {
    display: flex;
    gap: var(--space-sm);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca40; }

.window-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.code-content {
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.8;
    overflow-x: auto;
}

.code-content .comment { color: #6b6882; }
.code-content .keyword { color: #c792ea; }
.code-content .string { color: #c3e88d; }
.code-content .function { color: #82aaff; }

/* ===== Sections ===== */
.section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-badge {
    display: inline-block;
    background: rgba(220, 38, 38, 0.15);
    border: 1px solid rgba(220, 38, 38, 0.3);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* ===== Overview Section ===== */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.overview-card {
    background: var(--gradient-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: var(--transition-base);
}

.overview-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.card-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(220, 38, 38, 0.15);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

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

.overview-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

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

/* ===== Features Section ===== */
.features {
    background: var(--dark-surface);
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    max-width: 800px;
    margin: 0 auto;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.feature-item:hover {
    border-color: var(--primary);
    transform: translateX(10px);
}

.feature-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
}

.feature-icon i {
    font-size: 1.25rem;
    color: white;
}

.feature-content h3 {
    font-size: 1.1rem;
    margin-bottom: var(--space-xs);
}

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

/* ===== Technologies Section ===== */
.tech-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-lg);
}

.tech-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xl) var(--space-2xl);
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.tech-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.tech-card i {
    font-size: 2rem;
    color: var(--primary);
}

.tech-card span {
    font-weight: 600;
    color: var(--text-secondary);
}

/* ===== Dataset Preview Section ===== */
.dataset-preview {
    background: var(--dark-surface);
}

.preview-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
}

.tab-btn {
    padding: var(--space-sm) var(--space-lg);
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.tab-btn:hover,
.tab-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* ===== Data Table ===== */
.data-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--dark-border);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.data-table th,
.data-table td {
    padding: var(--space-md) var(--space-lg);
    text-align: left;
    border-bottom: 1px solid var(--dark-border);
}

.data-table th {
    background: var(--dark-card);
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.data-table td {
    background: var(--dark-surface);
    color: var(--text-secondary);
}

.data-table tr:hover td {
    background: var(--dark-card);
}

.category-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
}

.category-badge.tech { background: rgba(59, 130, 246, 0.2); color: var(--cat-tech); }
.category-badge.sports { background: rgba(34, 197, 94, 0.2); color: var(--cat-sports); }
.category-badge.politics { background: rgba(139, 92, 246, 0.2); color: var(--cat-politics); }
.category-badge.entertainment { background: rgba(236, 72, 153, 0.2); color: var(--cat-entertainment); }
.category-badge.business { background: rgba(245, 158, 11, 0.2); color: var(--cat-business); }
.category-badge.science { background: rgba(6, 182, 212, 0.2); color: var(--cat-science); }

/* ===== JSON Preview ===== */
.json-preview .json-key { color: #89ddff; }
.json-preview .json-string { color: #c3e88d; }
.json-preview .json-number { color: #f78c6c; }

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.stat-card {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.stat-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
}

.stats-list {
    list-style: none;
}

.stats-list li {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    border-bottom: 1px dashed var(--dark-border);
    color: var(--text-secondary);
}

.stats-list li:last-child {
    border-bottom: none;
}

.stats-list strong {
    color: var(--text-primary);
}

.stat-chart {
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== Usage Section ===== */
.usage-steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--space-xl);
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
}

.step-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.code-snippet {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    overflow-x: auto;
}

.code-snippet code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--primary-light);
}

/* ===== Download Section ===== */
.download {
    background: var(--dark-surface);
}

.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.download-card {
    position: relative;
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    transition: var(--transition-base);
}

.download-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.download-card.featured {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.card-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.download-card .card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
}

.download-card .card-icon i {
    font-size: 2rem;
}

.download-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.download-card > p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.download-features {
    list-style: none;
    text-align: left;
    margin-bottom: var(--space-lg);
}

.download-features li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.download-features i {
    color: var(--cat-sports);
}

/* ===== Footer ===== */
.footer {
    background: var(--dark-surface);
    border-top: 1px solid var(--dark-border);
    padding: var(--space-3xl) 0 var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand p {
    color: var(--text-secondary);
    margin: var(--space-md) 0;
    max-width: 300px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.footer-column h4 {
    font-size: 1rem;
    margin-bottom: var(--space-md);
}

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

.footer-column li {
    padding: var(--space-xs) 0;
}

.footer-column a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--primary);
}

.footer-column li i {
    margin-right: var(--space-sm);
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--dark-border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-bottom strong {
    color: var(--primary);
}

/* ===== Back to Top Button ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-visual {
        max-width: 600px;
        margin: 0 auto;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        flex-direction: column;
        background: var(--dark-surface);
        padding: var(--space-lg);
        border-bottom: 1px solid var(--dark-border);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--space-lg);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .step {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
    }
    
    .feature-item:hover {
        transform: translateY(-5px);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .preview-tabs {
        flex-direction: column;
    }
    
    .download-options {
        grid-template-columns: 1fr;
    }
}