style.css

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --accent: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Dark Theme Only */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: rgba(0, 0, 0, 0.3);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    transition: var(--transition-base);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-3) var(--spacing-4);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
    transition: var(--transition-base);
    z-index: 1001;
}

.nav-brand:hover {
    transform: scale(1.05);
}

.nav-brand i {
    color: var(--primary);
    font-size: var(--font-size-xl);
    animation: pulse-glow 2s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
    from { 
        filter: drop-shadow(0 0 5px rgba(99, 102, 241, 0.5));
    }
    to { 
        filter: drop-shadow(0 0 15px rgba(99, 102, 241, 0.8));
    }
}

.nav-menu {
    display: flex;
    gap: var(--spacing-1);
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-1);
    border-radius: var(--radius-3xl);
    backdrop-filter: blur(10px);
}

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-2xl);
    transition: var(--transition-base);
    position: relative;
    font-size: var(--font-size-sm);
    white-space: nowrap;
}

.nav-link:hover {
    color: #ffffff;
    background: rgba(99, 102, 241, 0.2);
    transform: translateY(-2px);
}

.nav-link.active {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    cursor: pointer;
    padding: var(--spacing-2);
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 2px;
    background: #ffffff;
    border-radius: 2px;
    transition: var(--transition-base);
    transform-origin: center;
}

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

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

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

.mobile-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(15, 15, 35, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-menu-content {
    padding: var(--spacing-4);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    font-weight: 500;
    font-size: var(--font-size-base);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #ffffff;
    transform: translateX(5px);
}

.mobile-nav-link i {
    width: 20px;
    text-align: center;
}

/* Remove theme toggle button */
.theme-toggle {
    display: none;
}

/* Table Styles */
.sample-data-table {
    overflow-x: auto;
    margin-top: var(--spacing-4);
    -webkit-overflow-scrolling: touch;
}

.sample-data-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-width: 600px;
}

.sample-data-table th {
    background: var(--bg-secondary);
    padding: var(--spacing-3);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border);
    font-size: var(--font-size-sm);
}

.sample-data-table td {
    padding: var(--spacing-3);
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.sample-data-table tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

.type-badge {
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    display: inline-block;
}

.type-badge.defect {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

.type-badge.task {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
}

.type-badge.enhancement {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
}

/* Dataset Info */
.dataset-info {
    margin-bottom: var(--spacing-8);
}

.dataset-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-2xl);
    overflow: hidden;
}

.dataset-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.dataset-header i {
    color: var(--primary);
    font-size: var(--font-size-xl);
}

.dataset-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.dataset-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    border-bottom: 1px solid var(--border);
}

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

.dataset-stat .stat-number {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-1);
}

.dataset-stat .stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.dataset-columns {
    padding: var(--spacing-4);
}

.dataset-columns h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.columns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-3);
}

.column-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.column-item:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateX(5px);
}

.column-item i {
    color: var(--primary);
    font-size: var(--font-size-base);
    flex-shrink: 0;
}

.column-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
    font-size: var(--font-size-sm);
}

.column-type {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-16) var(--spacing-4);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(99,102,241,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    pointer-events: none;
}

.hero-content {
    flex: 1;
    max-width: 700px;
    z-index: 2;
    position: relative;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-4);
    position: relative;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    animation: gradient-shift 3s ease-in-out infinite alternate;
}

@keyframes gradient-shift {
    0% {
        background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    100% {
        background: linear-gradient(135deg, var(--accent), var(--primary), var(--secondary));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
}

.hero-subtitle {
    display: block;
    color: var(--text-secondary);
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    font-weight: 600;
    margin-top: var(--spacing-2);
    opacity: 0;
    animation: slideInUp 1s ease 0.5s forwards;
}

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

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-8);
    line-height: 1.7;
    opacity: 0;
    animation: slideInUp 1s ease 1s forwards;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-4);
    margin-top: var(--spacing-8);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.stat-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-4);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
    min-height: 100px;
    width: 100%;
    /* Remove animations */
    opacity: 1;
    transform: none;
}

/* Remove stat card animation delays */

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.stat-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 30px rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.3);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    flex-shrink: 0;
}

.stat-number {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: var(--spacing-1);
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2;
    position: relative;
}

.floating-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-4);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    /* Remove floating animation */
    width: 100%;
    max-width: 400px;
    position: relative;
    overflow: hidden;
}

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

@keyframes float {
    0%, 100% { 
        transform: translateY(0px) rotate(0deg); 
    }
    33% { 
        transform: translateY(-10px) rotate(1deg); 
    }
    66% { 
        transform: translateY(-5px) rotate(-1deg); 
    }
}

/* Sections */
.section {
    padding: var(--spacing-12) 0;
    position: relative;
}

.section:nth-child(even) {
    background: var(--bg-secondary);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-8);
    position: relative;
    padding: 0 var(--spacing-4);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-3);
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
}

/* Overview Grid */
.overview-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
}

.overview-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.overview-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.overview-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px var(--shadow);
    border-color: var(--primary);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.card-header i {
    font-size: var(--font-size-xl);
    color: var(--primary);
}

.card-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.overview-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-base);
}

.overview-card ul {
    list-style: none;
    color: var(--text-secondary);
}

.overview-card li {
    padding: var(--spacing-2) 0;
    position: relative;
    padding-left: var(--spacing-4);
    font-size: var(--font-size-base);
}

.overview-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* Data Grid - Responsive Layout */
.data-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
    width: 100%;
    max-width: 100%;
}

/* Product Analysis Enhancement */
.data-grid .chart-card:last-child {
    grid-column: 1 / -1;
}

/* Mobile and tablet responsive data grid */
@media (max-width: 768px) {
    .data-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
        margin-bottom: var(--spacing-6);
    }
    
    .data-grid .chart-card:last-child {
        grid-column: 1;
    }
}

.data-card,
.chart-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    transition: var(--transition-base);
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

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

/* Mobile optimizations for data and chart cards */
@media (max-width: 768px) {
    .data-card,
    .chart-card {
        padding: var(--spacing-6);
        border-radius: var(--radius-xl);
    }
}

@media (max-width: 480px) {
    .data-card,
    .chart-card {
        padding: var(--spacing-4);
        border-radius: var(--radius-lg);
    }
}

.data-card h3,
.chart-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.data-card:hover,
.chart-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px var(--shadow);
}

/* Pipeline */
.pipeline {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
}

.pipeline-step {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-4);
    text-align: center;
    width: 100%;
    max-width: 300px;
    transition: var(--transition-base);
    position: relative;
}

.pipeline-step:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px var(--shadow);
    border-color: var(--primary);
}

.step-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-3);
    color: white;
    font-size: var(--font-size-lg);
}

.step-content h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.pipeline-arrow {
    color: var(--primary);
    font-size: var(--font-size-xl);
    transform: rotate(90deg);
}

.smote-comparison {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
}

.comparison-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    text-align: center;
    height: 300px;
    display: flex;
    flex-direction: column;
}

.comparison-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.comparison-card > div {
    flex: 1;
    min-height: 200px;
}

/* Models Showcase */
.models-showcase {
    display: grid;
    gap: var(--spacing-8);
}

.top-models {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
}

.model-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    text-align: center;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.model-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.model-card.gold::before {
    background: linear-gradient(90deg, #ffd700, #ffed4e);
}

.model-card.silver::before {
    background: linear-gradient(90deg, #c0c0c0, #e5e5e5);
}

.model-card.bronze::before {
    background: linear-gradient(90deg, #cd7f32, #daa520);
}

.model-card:hover {
    transform: translateY(-5px) scale(1.01);
    box-shadow: 0 15px 30px var(--shadow);
}

.model-rank {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-3);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-8px); }
    60% { transform: translateY(-4px); }
}

.model-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-3);
    color: var(--text-primary);
}

.model-accuracy {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-2);
}

.model-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

.models-chart {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    height: 500px;
    overflow: hidden;
}

.models-chart h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

/* Performance Grid */
.performance-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
}

.performance-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    height: 400px;
    overflow: hidden;
}

.performance-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.metrics-table {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.metrics-table table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-4);
    min-width: 500px;
}

.metrics-table th,
.metrics-table td {
    padding: var(--spacing-2);
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: var(--font-size-sm);
}

.metrics-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
}

.metrics-table td {
    color: var(--text-secondary);
}

/* Insights Grid */
.insights-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

.insight-card {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    transition: var(--transition-base);
}

.insight-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
}

.insight-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-4);
    color: white;
    font-size: var(--font-size-lg);
}

.insight-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.insight-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-base);
}

.business-impact {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
}

.business-impact h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-6);
    text-align: center;
    color: var(--text-primary);
}

.impact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
}

.impact-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
}

.impact-card h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-3);
    color: var(--text-primary);
}

.impact-card ul {
    list-style: none;
}

.impact-card li {
    padding: var(--spacing-2) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--spacing-4);
    font-size: var(--font-size-sm);
}

.impact-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: var(--spacing-8) 0;
    text-align: center;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-3);
    color: var(--text-primary);
}

.footer-brand i {
    color: var(--primary);
    font-size: var(--font-size-xl);
}

.footer p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-6);
    line-height: 1.6;
}

.footer-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-6);
}

.badge {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-2xl);
    font-weight: 600;
    font-size: var(--font-size-xs);
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
    transition: var(--transition-base);
    white-space: nowrap;
}

.badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(99, 102, 241, 0.4);
}

.footer-note {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* Chart containers */
.chart-card > div,
.models-chart > div,
.performance-card > div,
.comparison-card > div {
    height: 100%;
    min-height: 200px;
}

/* Scroll progress indicator */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    z-index: 1001;
    transition: width 0.3s ease;
}

/* Tablet Styles (768px and above) */
@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-6);
    }

    .hero {
        flex-direction: row;
        text-align: left;
        padding: var(--spacing-20) var(--spacing-6);
        min-height: 100vh;
    }

    .hero-content {
        max-width: 600px;
        margin-bottom: 0;
    }

    .hero-title {
        font-size: clamp(3rem, 8vw, 5rem);
    }

    .hero-subtitle {
        font-size: clamp(2rem, 5vw, 3rem);
    }

    .hero-description {
        font-size: var(--font-size-xl);
    }

    .hero-stats {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-6);
    }

    .stat-card {
        padding: var(--spacing-6);
    }

    .stat-icon {
        width: 56px;
        height: 56px;
        font-size: var(--font-size-xl);
    }

    .stat-number {
        font-size: var(--font-size-2xl);
    }

    .stat-label {
        font-size: var(--font-size-sm);
    }

    .section-title {
        font-size: var(--font-size-4xl);
        margin-bottom: var(--spacing-12);
        padding: 0;
    }

    .section-title::after {
        width: 80px;
        height: 4px;
    }

    .overview-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-8);
    }

    .overview-card {
        padding: var(--spacing-8);
    }

    .card-header i {
        font-size: var(--font-size-2xl);
    }

    .card-header h3 {
        font-size: var(--font-size-xl);
    }

    .overview-card p {
        font-size: var(--font-size-lg);
    }

    .data-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-8);
    }

    .data-card,
    .chart-card {
        padding: var(--spacing-8);
    }

    .data-card h3,
    .chart-card h3 {
        font-size: var(--font-size-xl);
    }

    .pipeline {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-6);
    }

    .pipeline-step {
        max-width: 200px;
        padding: var(--spacing-6);
    }

    .pipeline-arrow {
        transform: rotate(0deg);
    }

    .smote-comparison {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-8);
    }

    .comparison-card {
        padding: var(--spacing-8);
    }

    .comparison-card h3 {
        font-size: var(--font-size-xl);
    }

    .top-models {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-8);
    }

    .model-card {
        padding: var(--spacing-8);
    }

    .model-rank {
        font-size: var(--font-size-4xl);
    }

    .model-card h3 {
        font-size: var(--font-size-xl);
    }

    .model-accuracy {
        font-size: var(--font-size-3xl);
    }

    .models-chart {
        padding: var(--spacing-8);
        height: 600px;
    }

    .models-chart h3 {
        font-size: var(--font-size-xl);
    }

    .performance-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-8);
    }

    .performance-card {
        padding: var(--spacing-8);
    }

    .performance-card h3 {
        font-size: var(--font-size-xl);
    }

    .insights-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-8);
    }

    .insight-card {
        padding: var(--spacing-8);
    }

    .insight-icon {
        width: 56px;
        height: 56px;
        font-size: var(--font-size-xl);
    }

    .insight-card h3 {
        font-size: var(--font-size-xl);
    }

    .business-impact {
        padding: var(--spacing-8);
    }

    .business-impact h3 {
        font-size: var(--font-size-2xl);
    }

    .impact-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-8);
    }

    .impact-card {
        padding: var(--spacing-6);
    }

    .impact-card h4 {
        font-size: var(--font-size-lg);
    }

    .impact-card li {
        font-size: var(--font-size-base);
    }

    .footer {
        padding: var(--spacing-12) 0;
    }

    .footer-brand {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-4);
    }

    .footer-brand i {
        font-size: var(--font-size-3xl);
    }

    .footer p {
        font-size: var(--font-size-lg);
        margin-bottom: var(--spacing-8);
    }

    .footer-badges {
        gap: var(--spacing-4);
    }

    .badge {
        padding: var(--spacing-3) var(--spacing-6);
        font-size: var(--font-size-sm);
    }
}

/* Desktop Styles (1024px and above) */
@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-8);
    }

    .nav-menu {
        gap: var(--spacing-2);
        padding: var(--spacing-2);
    }

    .nav-link {
        padding: var(--spacing-3) var(--spacing-5);
        font-size: var(--font-size-base);
    }

    .mobile-menu-toggle {
        display: none;
    }

    .nav-menu {
        display: flex;
    }

    .hero {
        padding: var(--spacing-20) var(--spacing-8);
    }

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

    .hero-title {
        font-size: clamp(4rem, 8vw, 6rem);
    }

    .hero-subtitle {
        font-size: clamp(2.5rem, 5vw, 3.5rem);
    }

    .hero-stats {
        gap: var(--spacing-8);
    }

    .stat-card {
        padding: var(--spacing-8);
    }

    .stat-icon {
        width: 60px;
        height: 60px;
        font-size: var(--font-size-2xl);
    }

    .stat-number {
        font-size: var(--font-size-3xl);
    }

    .floating-card {
        padding: var(--spacing-8);
        max-width: 500px;
    }

    .section {
        padding: var(--spacing-20) 0;
    }

    .overview-grid {
        gap: var(--spacing-12);
    }

    .columns-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .pipeline-step {
        max-width: 250px;
        padding: var(--spacing-8);
    }

    .step-icon {
        width: 60px;
        height: 60px;
        font-size: var(--font-size-xl);
    }

    .step-content h3 {
        font-size: var(--font-size-lg);
    }

    .step-content p {
        font-size: var(--font-size-base);
    }

    .model-card {
        padding: var(--spacing-10);
    }

    .model-rank {
        font-size: var(--font-size-5xl);
    }

    .model-card h3 {
        font-size: var(--font-size-2xl);
    }

    .model-accuracy {
        font-size: var(--font-size-4xl);
    }

    .models-chart {
        height: 700px;
    }

    .insights-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-content {
        padding: 0;
    }
}

/* Mobile-specific optimizations */
@media (max-width: 767px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 80px;
    }

    .hero-content {
        order: 2;
    }

    .hero-visual {
        order: 1;
        margin-bottom: var(--spacing-8);
    }

    .floating-card {
        max-width: 100%;
    }

    .nav-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-brand span {
        font-size: var(--font-size-base);
    }

    .sample-data-table {
        margin-left: -var(--spacing-4);
        margin-right: -var(--spacing-4);
        padding: 0 var(--spacing-4);
        width: calc(100% + var(--spacing-8));
    }

    .sample-data-table table {
        min-width: 500px;
    }

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

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

    .pipeline-step {
        max-width: 100%;
    }

    .model-card {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .performance-card {
        height: 350px;
    }

    .footer-brand span {
        font-size: var(--font-size-lg);
    }

    .footer-badges {
        flex-direction: column;
        align-items: center;
    }

    .badge {
        width: 100%;
        max-width: 200px;
    }
}

/* Small mobile devices (up to 360px) */
@media (max-width: 360px) {
    .container {
        padding: 0 var(--spacing-3);
    }

    .nav-container {
        padding: var(--spacing-2) var(--spacing-3);
    }

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

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-description {
        font-size: var(--font-size-base);
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .stat-card {
        padding: var(--spacing-3);
    }

    .stat-icon {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-base);
    }

    .stat-number {
        font-size: var(--font-size-lg);
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .dataset-stats {
        grid-template-columns: 1fr;
    }

    .floating-card {
        padding: var(--spacing-3);
    }
}

/* Prevent horizontal scrolling */
html, body {
    max-width: 100%;
    overflow-x: hidden;
}

/* Touch-friendly tap targets */
button,
a,
input,
select,
textarea {
    min-height: 44px;
    min-width: 44px;
}

/* Smooth transitions for mobile */
* {
    -webkit-tap-highlight-color: transparent;
}

/* Optimize font rendering for mobile */
body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Improve scrolling performance */
.hero,
.section {
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Optimize images and charts for mobile */
img,
canvas,
.chart-card > div {
    max-width: 100%;
    height: auto;
}

/* Prevent text size adjustment on orientation change */
html {
    -webkit-text-size-adjust: 100%;
}

/* Dataset Section Styling */
.dataset-info {
    margin-bottom: var(--spacing-16);
}

.dataset-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    transition: var(--transition-base);
}

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

.dataset-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.dataset-header i {
    font-size: var(--font-size-2xl);
    color: var(--primary);
}

.dataset-header h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
}

.dataset-content {
    display: grid;
    gap: var(--spacing-8);
}

.dataset-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-4);
}

.dataset-stat {
    text-align: center;
    padding: var(--spacing-4);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.dataset-stat .stat-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary);
    display: block;
}

.dataset-stat .stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-1);
}

.dataset-columns h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-6);
}

.columns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-4);
}

.column-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.column-item:hover {
    transform: translateX(5px);
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.column-item i {
    font-size: var(--font-size-lg);
    color: var(--primary);
    width: 20px;
    text-align: center;
}

.column-info {
    flex: 1;
}

.column-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.column-type {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-1);
}

/* Sample Data Table */
.sample-data-table {
    overflow-x: auto;
    margin-top: var(--spacing-4);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.sample-data-table table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.sample-data-table th,
.sample-data-table td {
    padding: var(--spacing-3) var(--spacing-4);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.sample-data-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    white-space: nowrap;
}

.sample-data-table td {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.sample-data-table tr:hover {
    background: rgba(99, 102, 241, 0.05);
}

/* Type Badges */
.type-badge {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-3xl);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.type-badge.defect {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.type-badge.task {
    background: rgba(16, 185, 129, 0.2);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.type-badge.enhancement {
    background: rgba(6, 182, 212, 0.2);
    color: #06b6d4;
    border: 1px solid rgba(6, 182, 212, 0.3);
}

/* Enhanced Mobile Responsiveness */
@media (max-width: 1200px) {
    .container {
        padding: 0 var(--spacing-4);
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .columns-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 992px) {
    .nav-container {
        padding: var(--spacing-3) var(--spacing-4);
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-12) var(--spacing-4);
    }
    
    .hero-content {
        max-width: 100%;
        margin-bottom: var(--spacing-8);
    }
    
    .hero-visual {
        max-width: 100%;
    }
    
    .floating-card {
        max-width: 400px;
    }
    
    .dataset-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .columns-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .section {
        padding: var(--spacing-12) 0;
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
        margin-bottom: var(--spacing-12);
    }
    
    .hero-title {
        font-size: clamp(2.5rem, 8vw, 4rem);
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-4);
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-4);
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-2);
    }
    
    .overview-grid,
    .performance-grid,
    .impact-grid,
    .smote-comparison {
        grid-template-columns: 1fr;
    }
    
    .top-models {
        grid-template-columns: 1fr;
    }
    
    .pipeline {
        flex-direction: column;
    }
    
    .pipeline-arrow {
        transform: rotate(90deg);
    }
    
    .dataset-stats {
        grid-template-columns: 1fr;
    }
    
    .sample-data-table {
        font-size: var(--font-size-xs);
    }
    
    .sample-data-table th,
    .sample-data-table td {
        padding: var(--spacing-2) var(--spacing-3);
    }
    
    .footer-badges {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-2);
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 var(--spacing-3);
    }
    
    .nav-container {
        padding: var(--spacing-3);
    }
    
    .nav-brand {
        font-size: var(--font-size-lg);
    }
    
    .nav-brand span {
        display: none;
    }
    
    .hero {
        padding: var(--spacing-10) var(--spacing-3);
        min-height: 80vh;
    }
    
    .hero-title {
        font-size: clamp(2rem, 10vw, 3rem);
    }
    
    .hero-description {
        font-size: var(--font-size-base);
    }
    
    .floating-card {
        max-width: 300px;
        padding: var(--spacing-4);
    }
    
    .overview-card,
    .data-card,
    .chart-card,
    .dataset-card {
        padding: var(--spacing-4);
    }
    
    .card-header h3,
    .dataset-header h3 {
        font-size: var(--font-size-lg);
    }
    
    .pipeline-step {
        min-width: 180px;
        padding: var(--spacing-4);
    }
    
    .step-icon {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-lg);
    }
    
    .model-card {
        padding: var(--spacing-4);
    }
    
    .model-rank {
        font-size: var(--font-size-4xl);
    }
    
    .insights-grid {
        grid-template-columns: 1fr;
    }
    
    .insight-card {
        padding: var(--spacing-4);
    }
    
    .insight-icon {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-lg);
    }
    
    .columns-grid {
        gap: var(--spacing-3);
    }
    
    .column-item {
        padding: var(--spacing-3);
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-2);
    }
    
    .column-item i {
        margin-bottom: var(--spacing-1);
    }
}

@media (max-width: 400px) {
    .hero-stats {
        gap: var(--spacing-3);
    }
    
    .stat-card {
        padding: var(--spacing-3);
    }
    
    .stat-number {
        font-size: var(--font-size-xl);
    }
    
    .floating-card {
        max-width: 280px;
        padding: var(--spacing-3);
    }
    
    .sample-data-table {
        font-size: 0.7rem;
    }
    
    .type-badge {
        font-size: 0.6rem;
        padding: 2px 6px;
    }
}

/* Improved Touch Targets for Mobile */
@media (hover: none) and (pointer: coarse) {
    .nav-link,
    .mobile-nav-link,
    .theme-toggle,
    .mobile-menu-toggle {
        min-height: 44px;
        min-width: 44px;
    }
    
    .stat-card,
    .overview-card,
    .data-card,
    .chart-card,
    .model-card,
    .insight-card {
        transition: none;
    }
    
    .stat-card:hover,
    .overview-card:hover,
    .data-card:hover,
    .chart-card:hover,
    .model-card:hover,
    .insight-card:hover {
        transform: none;
    }
}

/* Landscape Mobile Optimization */
@media (max-width: 896px) and (orientation: landscape) {
    .hero {
        min-height: 100vh;
        padding: var(--spacing-8) var(--spacing-4);
    }
    
    .hero-stats {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-3);
    }
    
    .stat-card {
        padding: var(--spacing-3);
    }
    
    .section {
        padding: var(--spacing-8) 0;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .mobile-menu,
    .theme-toggle,
    .mobile-menu-toggle {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding: var(--spacing-8) 0;
    }
    
    .section {
        padding: var(--spacing-6) 0;
        break-inside: avoid;
    }
    
    .stat-card,
    .overview-card,
    .data-card,
    .chart-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}
/* Enhanced Chart Styling */
.chart-card {
    position: relative;
    overflow: hidden;
}

.chart-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    z-index: 1;
}

.chart-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-6);
    color: var(--text-primary);
    text-align: center;
    position: relative;
}

.chart-card h3::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-2);
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 1px;
}

/* Floating Card Enhancement */
.floating-card {
    position: relative;
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(25px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.floating-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(99, 102, 241, 0.05), transparent);
    transform: rotate(45deg) translateX(-100%);
    transition: transform 0.8s;
    pointer-events: none;
}

.floating-card:hover::after {
    transform: rotate(45deg) translateX(100%);
}

/* SMOTE Comparison Enhancement */
.smote-comparison {
    position: relative;
    padding: var(--spacing-4);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.smote-comparison::before {
    content: 'Class Balancing with SMOTE';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    padding: 0 var(--spacing-4);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary);
    border: 1px solid var(--primary);
    border-radius: var(--radius-lg);
}

.comparison-card {
    position: relative;
    transition: var(--transition-base);
}

.comparison-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.comparison-card h3 {
    text-align: center;
    margin-bottom: var(--spacing-4);
    font-weight: 600;
    position: relative;
}

.comparison-card:first-child h3 {
    color: var(--error);
}

.comparison-card:last-child h3 {
    color: var(--success);
}

/* Product Analysis Enhancement */
.data-grid .chart-card:last-child {
    grid-column: 1 / -1;
}

/* Chart Container Improvements */
.js-plotly-plot {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.js-plotly-plot .plotly {
    border-radius: var(--radius-lg);
}

/* Models Chart Enhancement */
.models-chart {
    position: relative;
}

.models-chart::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--error) 0%, 
        var(--warning) 25%, 
        var(--accent) 50%, 
        var(--primary) 75%, 
        var(--success) 100%);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* Performance Grid Enhancement */
.performance-card h3 {
    text-align: center;
    margin-bottom: var(--spacing-6);
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
}

.performance-card h3::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-2);
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

/* Scroll Progress Bar */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    z-index: 10000;
    transition: width 0.1s ease;
}

/* Chart Loading Animation */
@keyframes chartLoad {
    0% {
        opacity: 0;
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.js-plotly-plot {
    animation: chartLoad 0.6s ease forwards;
}

/* Enhanced Hover Effects for Charts */
.chart-card:hover .js-plotly-plot {
    transform: scale(1.02);
    transition: transform 0.3s ease;
}

.floating-card:hover .js-plotly-plot {
    transform: scale(1.05);
    transition: transform 0.3s ease;
}

/* Mobile Chart Optimizations */
@media (max-width: 768px) {
    .chart-card h3 {
        font-size: var(--font-size-lg);
        margin-bottom: var(--spacing-4);
    }
    
    .floating-card {
        padding: var(--spacing-4);
        margin: var(--spacing-4) 0;
    }
    
    .smote-comparison {
        padding: var(--spacing-3);
        margin: var(--spacing-6) 0;
    }
    
    .smote-comparison::before {
        font-size: var(--font-size-xs);
        padding: 0 var(--spacing-3);
        top: -10px;
    }
    
    .js-plotly-plot {
        min-height: 300px;
    }
    
    .chart-card:hover .js-plotly-plot,
    .floating-card:hover .js-plotly-plot {
        transform: none;
    }
}

@media (max-width: 480px) {
    .chart-card {
        padding: var(--spacing-3);
    }
    
    .chart-card h3 {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-3);
    }
    
    .floating-card {
        padding: var(--spacing-3);
    }
    
    .js-plotly-plot {
        min-height: 250px;
    }
}

/* Chart Interaction Feedback */
.chart-card {
    cursor: pointer;
    user-select: none;
}

.chart-card:active {
    transform: scale(0.98);
}

/* Enhanced Data Card for Sample Data */
.data-card h3 {
    text-align: center;
    margin-bottom: var(--spacing-4);
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
}

.data-card h3::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-2);
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 1px;
}

/* Improved Sample Data Table */
.sample-data-table {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

.sample-data-table::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.sample-data-table table {
    position: relative;
    z-index: 1;
}

.sample-data-table th {
    background: rgba(99, 102, 241, 0.1);
    position: sticky;
    top: 0;
    z-index: 2;
}

.sample-data-table tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}

.sample-data-table tr:hover {
    background: rgba(99, 102, 241, 0.08);
    transform: scale(1.01);
    transition: all 0.2s ease;
}

/* Loading States */
.chart-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

.chart-loading::before {
    content: '';
    width: 40px;
    height: 40px;
    border: 3px solid rgba(99, 102, 241, 0.3);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: var(--spacing-3);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
/* Chart Header Styling */
.chart-header {
    text-align: center;
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.chart-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    position: relative;
}

.chart-header h3::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-2);
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 1px;
}

/* Improved Sample Data Table */
.sample-data-container {
    position: relative;
}

.sample-data-table {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 
        inset 0 1px 3px rgba(0, 0, 0, 0.2),
        0 4px 15px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border);
}

.sample-data-table::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    z-index: 1;
}

.sample-data-table table {
    width: 100%;
    border-collapse: collapse;
    position: relative;
    z-index: 2;
}

.sample-data-table th {
    background: rgba(99, 102, 241, 0.15);
    padding: var(--spacing-3) var(--spacing-4);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    border-bottom: 2px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 3;
}

.sample-data-table td {
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    vertical-align: top;
}

.sample-data-table tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}

.sample-data-table tr:hover {
    background: rgba(99, 102, 241, 0.08);
    transform: scale(1.01);
    transition: all 0.2s ease;
}

.bug-id {
    font-family: 'Courier New', monospace;
    font-weight: 600;
    color: var(--accent);
    background: rgba(6, 182, 212, 0.1);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
}

.summary-col {
    max-width: 200px;
    width: 40%;
}

.summary-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
    display: block;
}

.summary-text:hover {
    white-space: normal;
    word-wrap: break-word;
    background: rgba(99, 102, 241, 0.1);
    padding: var(--spacing-2);
    border-radius: var(--radius-sm);
    position: relative;
    z-index: 10;
}

.table-note {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-top: var(--spacing-3);
    padding: var(--spacing-2) var(--spacing-3);
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.table-note i {
    color: var(--primary);
}

/* Mobile Optimizations for Sample Data */
@media (max-width: 768px) {
    .chart-header h3 {
        font-size: var(--font-size-lg);
    }
    
    .hide-mobile {
        display: none;
    }
    
    .summary-col {
        max-width: 150px;
        width: 60%;
    }
    
    .sample-data-table th,
    .sample-data-table td {
        padding: var(--spacing-2) var(--spacing-3);
        font-size: var(--font-size-xs);
    }
    
    .bug-id {
        font-size: 10px;
        padding: 2px 4px;
    }
    
    .type-badge {
        font-size: 9px;
        padding: 2px 6px;
    }
    
    .summary-text {
        max-width: 120px;
        font-size: var(--font-size-xs);
    }
    
    .table-note {
        font-size: 10px;
        padding: var(--spacing-2);
    }
    
    /* Mobile table scroll */
    .sample-data-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .sample-data-table::-webkit-scrollbar {
        height: 4px;
    }
    
    .sample-data-table::-webkit-scrollbar-track {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 2px;
    }
    
    .sample-data-table::-webkit-scrollbar-thumb {
        background: var(--primary);
        border-radius: 2px;
    }
}

@media (max-width: 480px) {
    .chart-header {
        margin-bottom: var(--spacing-3);
        padding-bottom: var(--spacing-2);
    }
    
    .chart-header h3 {
        font-size: var(--font-size-base);
    }
    
    .summary-col {
        max-width: 100px;
    }
    
    .summary-text {
        max-width: 80px;
    }
    
    .sample-data-table th,
    .sample-data-table td {
        padding: var(--spacing-1) var(--spacing-2);
    }
    
    .bug-id {
        font-size: 9px;
        padding: 1px 3px;
    }
    
    .type-badge {
        font-size: 8px;
        padding: 1px 4px;
    }
}

/* Temporal Chart Mobile Fix */
@media (max-width: 768px) {
    .data-grid .chart-card:first-child {
        overflow: hidden;
    }
    
    .data-grid .chart-card:first-child .js-plotly-plot {
        max-width: 100%;
        overflow: hidden;
    }
}

/* Enhanced Mobile Chart Containers */
@media (max-width: 576px) {
    .floating-card {
        max-width: 100%;
        margin: 0;
        border-radius: var(--radius-xl);
    }
    
    .chart-card {
        max-width: 100%;
        overflow: hidden;
    }
    
    .js-plotly-plot {
        max-width: 100% !important;
        overflow: hidden !important;
    }
    
    .js-plotly-plot .plotly {
        max-width: 100% !important;
    }
}

/* Fix for chart overflow on very small screens */
@media (max-width: 400px) {
    .sample-data-table {
        font-size: 10px;
    }
    
    .summary-text {
        max-width: 60px;
    }
    
    .chart-header h3 {
        font-size: var(--font-size-sm);
    }
    
    .floating-card {
        padding: var(--spacing-2);
    }
}
/* Enhanced Mobile Container Management */
@media (max-width: 768px) {
    /* Ensure all containers fit within viewport */
    .container {
        max-width: 100%;
        padding: 0 var(--spacing-4);
        overflow-x: hidden;
    }
    
    /* Data grid mobile optimization */
    .data-grid {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
    }
    
    /* Chart containers mobile fix */
    .chart-card,
    .data-card {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        overflow: hidden;
    }
    
    /* Plotly chart mobile container */
    .js-plotly-plot {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
    }
    
    .js-plotly-plot .plotly {
        width: 100% !important;
        max-width: 100% !important;
    }
    
    /* Sample data table mobile container */
    .sample-data-container {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
    }
    
    .sample-data-table {
        width: 100%;
        max-width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    /* Temporal chart specific mobile fix */
    .data-grid .chart-card:first-child {
        overflow: hidden;
    }
    
    .data-grid .chart-card:first-child .js-plotly-plot {
        max-width: 100%;
        overflow: hidden;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 var(--spacing-3);
    }
    
    /* Extra small screen optimizations */
    .data-grid {
        gap: var(--spacing-4);
    }
    
    .chart-card,
    .data-card {
        padding: var(--spacing-3);
        margin-bottom: var(--spacing-4);
    }
    
    /* Force chart containers to be responsive */
    .js-plotly-plot {
        min-height: 200px !important;
        height: auto !important;
    }
}

@media (max-width: 400px) {
    .container {
        padding: 0 var(--spacing-2);
    }
    
    .data-grid {
        gap: var(--spacing-3);
    }
    
    .chart-card,
    .data-card {
        padding: var(--spacing-2);
        border-radius: var(--radius-md);
    }
}

/* Landscape mobile optimization */
@media (max-width: 896px) and (orientation: landscape) {
    .data-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-4);
    }
    
    .chart-card,
    .data-card {
        padding: var(--spacing-4);
    }
    
    .js-plotly-plot {
        height: 250px !important;
    }
}

/* Prevent horizontal scroll on all mobile devices */
@media (max-width: 768px) {
    body {
        overflow-x: hidden;
    }
    
    * {
        max-width: 100%;
        box-sizing: border-box;
    }
    
    /* Ensure no element exceeds viewport width */
    .section,
    .container,
    .data-grid,
    .chart-card,
    .data-card,
    .sample-data-table,
    .js-plotly-plot {
        max-width: 100vw;
        overflow-x: hidden;
    }
}
/* Laptop Screen Optimizations (1024px - 1440px) */
@media (min-width: 1024px) and (max-width: 1440px) {
    .container {
        max-width: 1200px;
        padding: 0 var(--spacing-6);
    }
    
    /* Ensure data grid stays 2-column on laptops */
    .data-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-8);
        align-items: start;
    }
    
    /* Optimize chart sizing for laptop screens */
    .chart-card,
    .data-card {
        padding: var(--spacing-8);
        min-height: 400px;
        display: flex;
        flex-direction: column;
    }
    
    .chart-card h3,
    .data-card h3 {
        margin-bottom: var(--spacing-6);
        flex-shrink: 0;
    }
    
    /* Ensure charts fill their containers properly */
    .js-plotly-plot {
        flex: 1;
        min-height: 300px;
        width: 100%;
    }
    
    /* Sample data table optimization for laptops */
    .sample-data-container {
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    
    .sample-data-table {
        flex: 1;
        min-height: 250px;
    }
    
    /* Product analysis full width on laptops */
    .data-grid .chart-card:last-child {
        grid-column: 1 / -1;
        min-height: 450px;
    }
}

/* Large Laptop/Desktop Screens (1441px+) */
@media (min-width: 1441px) {
    .container {
        max-width: 1400px;
        padding: 0 var(--spacing-8);
    }
    
    .data-grid {
        gap: var(--spacing-10);
    }
    
    .chart-card,
    .data-card {
        padding: var(--spacing-10);
        min-height: 450px;
    }
    
    .js-plotly-plot {
        min-height: 350px;
    }
    
    .data-grid .chart-card:last-child {
        min-height: 500px;
    }
}

/* Medium Laptop Screens (769px - 1023px) */
@media (min-width: 769px) and (max-width: 1023px) {
    .container {
        max-width: 100%;
        padding: 0 var(--spacing-5);
    }
    
    .data-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-6);
    }
    
    .chart-card,
    .data-card {
        padding: var(--spacing-6);
        min-height: 350px;
    }
    
    .js-plotly-plot {
        min-height: 250px;
    }
    
    /* Adjust font sizes for medium laptops */
    .chart-card h3,
    .data-card h3 {
        font-size: var(--font-size-lg);
    }
}

/* Fix for specific laptop resolutions */
@media (min-width: 1366px) and (max-width: 1366px) {
    /* Common laptop resolution 1366x768 */
    .data-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-7);
    }
    
    .chart-card,
    .data-card {
        padding: var(--spacing-7);
    }
}

@media (min-width: 1920px) {
    /* Full HD and above */
    .container {
        max-width: 1600px;
    }
    
    .data-grid {
        gap: var(--spacing-12);
    }
    
    .chart-card,
    .data-card {
        padding: var(--spacing-12);
        min-height: 500px;
    }
}

/* Ensure proper aspect ratios on all laptop screens */
@media (min-width: 769px) {
    .floating-card {
        max-width: 600px;
        min-height: 450px;
    }
    
    .hero-stats {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .stat-card {
        min-height: 120px;
    }
}
/* Force data-grid visibility on laptop screens */
@media (min-width: 769px) {
    .data-grid {
        display: grid !important;
        grid-template-columns: 1fr 1fr !important;
        gap: var(--spacing-8) !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
    
    .data-card,
    .chart-card {
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
    
    /* Ensure product analysis spans full width */
    .data-grid .chart-card:last-child {
        grid-column: 1 / -1 !important;
    }
}

/* Debug styles for laptop screens */
@media (min-width: 1024px) {
    .data-grid {
        border: 2px solid rgba(99, 102, 241, 0.3) !important;
        min-height: 400px !important;
    }
    
    .data-card,
    .chart-card {
        border: 1px solid rgba(139, 92, 246, 0.5) !important;
        min-height: 300px !important;
    }
}
/* Laptop Screen Hero Stats Fix */
@media (min-width: 1024px) {
    .hero-stats {
        grid-template-columns: repeat(4, 1fr) !important;
        gap: var(--spacing-4) !important;
        max-width: 1200px !important;
        margin: var(--spacing-8) auto 0 auto !important;
    }
    
    .stat-card {
        min-height: 100px !important;
        padding: var(--spacing-4) !important;
        display: flex !important;
        align-items: center !important;
        gap: var(--spacing-3) !important;
        opacity: 1 !important;
        transform: none !important;
        animation: none !important;
    }
    
    .stat-number {
        font-size: var(--font-size-2xl) !important;
        font-weight: 700 !important;
        color: var(--text-primary) !important;
        line-height: 1 !important;
        white-space: nowrap !important;
    }
    
    .stat-label {
        font-size: var(--font-size-sm) !important;
        color: var(--text-secondary) !important;
        font-weight: 500 !important;
        margin-top: var(--spacing-1) !important;
        white-space: nowrap !important;
    }
    
    .stat-icon {
        width: 50px !important;
        height: 50px !important;
        flex-shrink: 0 !important;
    }
    
    .stat-content {
        flex: 1 !important;
        min-width: 0 !important;
    }
}

/* Remove all animations from floating card */
.floating-card {
    animation: none !important;
}

@keyframes float {
    /* Disable float animation */
}

/* Ensure stat cards are visible on all screen sizes */
.stat-card {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
}

.stat-card:nth-child(1),
.stat-card:nth-child(2),
.stat-card:nth-child(3),
.stat-card:nth-child(4) {
    animation-delay: 0s !important;
    opacity: 1 !important;
    transform: none !important;
}