/* ============================================
   🎬 MOVIE SUCCESS PREDICTOR - IMPROVED UI
   Professional, balanced, modern design
   ============================================ */

:root {
    /* Colors */
    --bg-primary: #0a0e27;
    --bg-secondary: #1a1f3a;
    --surface: rgba(30, 35, 60, 0.75);
    --surface-hover: rgba(40, 45, 75, 0.85);
    --text-primary: #f0f4f8;
    --text-secondary: #b8c4d6;
    --text-muted: #8494a8;
    
    /* Accent colors */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-tertiary: #ec4899;
    --gradient-accent: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    
    /* Status colors */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --error: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    
    /* UI Elements */
    --border: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.3);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Consistent Spacing System */
    --max-width: 1280px;
    --spacing-xs: 0.5rem;    /* 8px */
    --spacing-sm: 1rem;      /* 16px */
    --spacing-md: 1.5rem;    /* 24px */
    --spacing-lg: 2rem;      /* 32px */
    --spacing-xl: 3rem;      /* 48px */
    --spacing-2xl: 4rem;     /* 64px */
    --spacing-3xl: 5rem;     /* 80px */
    
    /* Grid Gaps */
    --gap-sm: 1rem;
    --gap-md: 1.5rem;
    --gap-lg: 2rem;
    --gap-xl: 3rem;
}

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

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

@keyframes scaleIn {
    from { 
        opacity: 0; 
        transform: scale(0.95);
    }
    to { 
        opacity: 1; 
        transform: scale(1);
    }
}

@keyframes gradient {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ============================================
   BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 20% 10%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.12) 0%, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    animation: fadeIn 0.6s ease-out;
}

::selection {
    background: var(--accent-primary);
    color: white;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.875rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--accent-secondary);
}

/* ============================================
   LAYOUT - Improved Consistency
   ============================================ */
.container {
    width: min(90%, var(--max-width));
    margin: 0 auto;
    padding: 0 clamp(var(--spacing-sm), 3vw, var(--spacing-xl));
}

section {
    padding: clamp(var(--spacing-3xl), 10vh, 6rem) 0;
}

.section-header {
    text-align: center;
    margin-bottom: clamp(var(--spacing-xl), 8vw, var(--spacing-2xl));
    animation: slideUp 0.8s ease-out;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: clamp(1rem, 2vw, 1.125rem);
    max-width: 600px;
    margin: 0 auto;
}

.eyebrow {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   HEADER - Professional Navigation
   ============================================ */

/* Version Tag */
.version-tag {
    position: fixed;
    top: 8px;
    right: 12px;
    z-index: 1001;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--accent-primary);
    font-size: 0.65rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: all 0.3s ease;
}

.version-tag:hover {
    background: rgba(99, 102, 241, 0.25);
    border-color: rgba(99, 102, 241, 0.5);
    transform: scale(1.05);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(20px) saturate(180%);
    background: rgba(10, 14, 39, 0.9);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    animation: slideUp 0.6s ease-out;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: translateY(-2px);
}

.logo-icon {
    font-size: 2rem;
    filter: drop-shadow(0 2px 8px rgba(99, 102, 241, 0.4));
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.logo-sub {
    font-size: 0.75rem;
    font-weight: 500;
    opacity: 0.7;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.mobile-menu-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
    transform-origin: center;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

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

.primary-nav a {
    position: relative;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    border-radius: var(--radius-sm);
}

.primary-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width 0.3s ease;
}

.primary-nav a:hover {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.1);
}

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

/* ============================================
   BUTTONS - Professional Styling
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    background: var(--gradient-accent);
    background-size: 200% 200%;
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-glow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

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

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
    animation: gradient 3s ease infinite;
}

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

.btn:active {
    transform: translateY(0);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   HERO SECTION - Improved Balance
   ============================================ */
.hero {
    position: relative;
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    padding: clamp(var(--spacing-xl), 8vh, var(--spacing-3xl)) 0;
    overflow: hidden;
}

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

@media (min-width: 768px) {
    .hero-grid {
        grid-template-columns: 1.1fr 0.9fr;
        gap: var(--gap-xl);
    }
}

.hero-copy {
    animation: slideUp 0.8s ease-out;
}

.hero h1 {
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
}

.hero .lead {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: var(--gap-md);
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.hero-cta .btn,
.hero-cta .btn-outline {
    min-width: 200px;
    justify-content: center;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--gap-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
}

.hero-stat {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.hero-stat:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.stat-number {
    display: block;
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
    line-height: 1.1;
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-sublabel {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.hero-visual {
    animation: scaleIn 0.8s ease-out 0.2s backwards;
}

/* Glass Card */
.glass-card {
    background: var(--surface);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.glass-card h3 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    margin-bottom: var(--spacing-md);
}

.glass-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: var(--gap-md);
}

.feature-item {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--gap-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.feature-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.feature-icon {
    font-size: 1.5rem;
}

.feature-item span:nth-child(2) {
    font-weight: 600;
    color: var(--text-primary);
}

.feature-item span:nth-child(3) {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-align: right;
}

/* ============================================
   GRID LAYOUTS - Balanced & Consistent
   ============================================ */
.about-grid, .feature-grid, .insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--gap-lg);
    animation: slideUp 0.8s ease-out;
}

.about-card, .feature-card, .insight-card {
    background: var(--surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all 0.3s ease;
    animation: scaleIn 0.6s ease-out backwards;
}

.about-card:nth-child(1) { animation-delay: 0.1s; }
.about-card:nth-child(2) { animation-delay: 0.2s; }
.about-card:nth-child(3) { animation-delay: 0.3s; }
.about-card:nth-child(4) { animation-delay: 0.4s; }
.about-card:nth-child(5) { animation-delay: 0.5s; }

.about-card:hover, .feature-card:hover, .insight-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.about-card h3, .feature-card h3, .insight-card h4 {
    font-size: clamp(1.125rem, 2.5vw, 1.25rem);
    margin-bottom: var(--spacing-md);
}

.about-card p, .feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.icon-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.insight-card ul {
    list-style: none;
    padding: 0;
}

.insight-card li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    color: var(--text-secondary);
    position: relative;
    line-height: 1.7;
}

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

/* ============================================
   FORMS - Professional Input Design
   ============================================ */
.predict-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--gap-xl);
    align-items: start;
}

@media (min-width: 1024px) {
    .predict-grid {
        grid-template-columns: 0.8fr 1fr;
    }
}

.predict-form {
    background: var(--surface);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.6s ease-out;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--gap-md);
    margin-bottom: var(--spacing-lg);
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

input, select, textarea {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md);
    font-size: 1rem;
    font-family: inherit;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

input::placeholder {
    color: var(--text-muted);
}

/* Custom Select Styling */
.custom-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%236366f1' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    padding-right: 40px;
    cursor: pointer;
}

.custom-select:hover {
    background-color: rgba(99, 102, 241, 0.08);
    border-color: var(--accent-primary);
}

.custom-select:focus {
    background-color: rgba(99, 102, 241, 0.12);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.custom-select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: var(--spacing-sm);
}

.custom-select option:hover,
.custom-select option:checked {
    background: var(--accent-primary);
    color: white;
}

/* Date Input Group */
.date-input-group {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-sm);
    align-items: center;
}

.month-select {
    min-width: 140px;
}

.year-input {
    min-width: 100px;
}

.date-separator {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--text-secondary);
    text-align: center;
    padding: 0 var(--spacing-xs);
}

.form-actions {
    display: flex;
    gap: var(--gap-md);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

/* ============================================
   DATA ANALYSIS PAGE
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--gap-lg);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.chart-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--gap-xl);
}

@media (min-width: 768px) {
    .chart-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .chart-full {
        grid-column: 1 / -1;
    }
}

.chart-card {
    background: var(--surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    animation: scaleIn 0.6s ease-out backwards;
}

.chart-card h3 {
    margin-bottom: var(--spacing-lg);
    font-size: clamp(1.125rem, 2.5vw, 1.25rem);
}

.chart-container {
    min-height: 300px;
}

.chart-description {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ============================================
   FOOTER - Professional Multi-Column
   ============================================ */
.site-footer {
    margin-top: var(--spacing-3xl);
    background: linear-gradient(135deg, 
                rgba(15, 17, 27, 0.95) 0%, 
                rgba(20, 23, 41, 0.95) 100%);
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.2);
}

.footer-inner {
    padding: var(--spacing-2xl) 0;
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--gap-2xl);
    align-items: start;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 360px;
    font-size: 0.95rem;
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--accent-primary);
    transition: all 0.3s ease;
    font-size: 1.25rem;
}

.social-link:hover {
    background: var(--accent-primary);
    color: var(--text-primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
}

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

.footer-column h4 {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: var(--spacing-xs);
}

.footer-column h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 32px;
    height: 2px;
    background: var(--gradient-accent);
    border-radius: var(--radius-sm);
}

.footer-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-column ul li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: var(--spacing-lg) 0;
    background: rgba(0, 0, 0, 0.2);
}

.footer-bottom .container {
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 992px) {
    .footer-inner {
        grid-template-columns: 1fr;
        gap: var(--gap-xl);
    }
    
    .footer-links-group {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--gap-lg);
    }
}

@media (max-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--gap-lg);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
        margin-bottom: var(--spacing-xl);
    }
    
    .hero-cta .btn,
    .hero-cta .btn-outline {
        width: 100%;
        min-width: auto;
    }
    
    .btn, .btn-outline {
        width: 100%;
    }
    
    .hero-stats {
        margin-top: var(--spacing-lg);
        padding-top: var(--spacing-md);
    }
    
    .primary-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-secondary);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: 80px var(--spacing-xl) var(--spacing-xl);
        gap: var(--spacing-lg);
        box-shadow: -4px 0 24px rgba(0, 0, 0, 0.3);
        transition: right 0.3s ease;
        z-index: 1000;
    }
    
    .primary-nav.active {
        right: 0;
    }
    
    .primary-nav a {
        width: 100%;
        padding: var(--spacing-md) var(--spacing-lg);
        text-align: left;
        font-size: 1.1rem;
        border-radius: var(--radius-md);
    }
    
    .primary-nav a:hover {
        background: rgba(99, 102, 241, 0.15);
        transform: translateX(4px);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    section {
        padding: var(--spacing-xl) 0;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    /* Better font size control */
    html {
        font-size: 15px; /* Slightly smaller base for mobile */
    }
    
    /* Version tag mobile */
    .version-tag {
        top: 4px;
        right: 8px;
        font-size: 0.6rem;
        padding: 2px 6px;
    }
    
    /* Header Mobile Optimization */
    .site-header {
        position: relative; /* Remove sticky on mobile to save space */
    }
    
    .header-inner {
        padding: var(--spacing-sm) 0;
        gap: var(--spacing-xs);
    }
    
    .logo {
        gap: var(--spacing-xs);
    }
    
    .logo-icon {
        font-size: 1.5rem;
        width: 1.5rem;
        height: 1.5rem;
    }
    
    .logo-text {
        font-size: 0.95rem;
        line-height: 1.2;
    }
    
    .logo-sub {
        font-size: 0.6rem;
        margin-top: 1px;
    }
    
    .primary-nav {
        flex-direction: row;
        gap: var(--spacing-xs);
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .primary-nav a {
        font-size: 0.85rem;
        padding: var(--spacing-xs) calc(var(--spacing-xs) * 1.2);
        white-space: nowrap;
    }
    
    /* Footer Mobile Optimization */
    .site-footer {
        margin-top: var(--spacing-xl);
    }
    
    .footer-inner {
        padding: var(--spacing-lg) 0;
    }
    
    .footer-links-group {
        grid-template-columns: 1fr;
        gap: var(--gap-md);
    }
    
    .footer-column {
        text-align: center;
    }
    
    .footer-column h4 {
        font-size: 0.9rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .footer-column h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer-column ul {
        gap: var(--spacing-xs);
    }
    
    .footer-column ul li a {
        font-size: 0.85rem;
    }
    
    .footer-brand {
        text-align: center;
        align-items: center;
    }
    
    .footer-logo {
        font-size: 1.25rem;
    }
    
    .footer-description {
        font-size: 0.85rem;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .social-link {
        width: 36px;
        height: 36px;
    }
    
    .footer-bottom {
        padding: var(--spacing-sm) 0;
    }
    
    .footer-bottom p {
        font-size: 0.75rem;
    }
    
    /* Hero Section Mobile */
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero .lead {
        font-size: 1rem;
    }
    
    /* Section Spacing Mobile */
    section {
        padding: var(--spacing-lg) 0;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
}

/* ============================================
   HERO BACKGROUND ANIMATION
   ============================================ */
.hero-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    opacity: 0.4;
}

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    background: var(--gradient-accent);
    border-radius: 50%;
    opacity: 0.1;
    filter: blur(60px);
}

.shape-1 {
    width: 400px;
    height: 400px;
    top: -200px;
    right: -100px;
}

.shape-2 {
    width: 300px;
    height: 300px;
    bottom: -150px;
    left: -100px;
}

.shape-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mb-0 { margin-bottom: 0; }
.mt-lg { margin-top: var(--spacing-lg); }
.hidden { display: none; }

/* ============================================
   CUSTOM INPUT FOR AUTOCOMPLETE
   ============================================ */
.custom-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md);
    font-size: 1rem;
    font-family: inherit;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.custom-input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.custom-input::placeholder {
    color: var(--text-muted);
}

/* Datalist styling (limited browser support) */
.custom-input[list] {
    position: relative;
}

.custom-input[list]::-webkit-calendar-picker-indicator {
    display: none;
}

/* ============================================
   RESULT PAGE - Modern Layout
   ============================================ */
.result-section {
    padding: var(--spacing-2xl) 0;
    min-height: 100vh;
}

.result-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.result-breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.result-breadcrumb a {
    color: var(--accent-primary);
    transition: color 0.3s ease;
}

.result-breadcrumb a:hover {
    color: var(--accent-secondary);
}

.result-breadcrumb .separator {
    opacity: 0.5;
}

.result-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.result-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* Main Prediction Card */
.result-main-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.prediction-result {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--gap-2xl);
    align-items: center;
}

/* Prediction Circle */
.prediction-circle-wrapper {
    position: relative;
}

.prediction-circle {
    width: 200px;
    height: 200px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.circle-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.circle-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.circle-percentage {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.circle-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.circle-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.circle-bg {
    fill: none;
    stroke: var(--border);
    stroke-width: 8;
}

.circle-fill {
    fill: none;
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 339.292;
    stroke-dashoffset: calc(339.292 - (339.292 * var(--progress)) / 100);
    transition: stroke-dashoffset 1.5s ease;
}

.prediction-success .circle-fill {
    stroke: var(--success);
    filter: drop-shadow(0 0 10px rgba(16, 185, 129, 0.5));
}

.prediction-failure .circle-fill {
    stroke: var(--error);
    filter: drop-shadow(0 0 10px rgba(239, 68, 68, 0.5));
}

/* Prediction Info */
.prediction-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.prediction-status {
    font-size: 2.5rem;
    font-weight: 800;
    margin: 0;
    line-height: 1.2;
}

.prediction-status-success {
    background: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.prediction-status-failure {
    background: linear-gradient(135deg, #ef4444 0%, #f87171 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.prediction-description {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1.05rem;
}

.prediction-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--gap-md);
    margin-top: var(--spacing-md);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.meta-icon {
    font-size: 1.5rem;
}

.meta-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.meta-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.meta-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Result Grid */
.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--gap-xl);
    margin-bottom: var(--spacing-xl);
}

.result-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.result-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.title-icon {
    font-size: 1.75rem;
}

/* Details List */
.details-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
    transition: background 0.3s ease;
}

.detail-row:hover {
    background: rgba(255, 255, 255, 0.05);
}

.detail-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.detail-value {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.detail-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-sm);
    color: var(--accent-primary);
    font-weight: 600;
}

/* Explanation Content */
.explanation-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.explanation-intro {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1rem;
}

.explanation-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.explanation-list li {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.02);
    border-left: 3px solid var(--accent-primary);
    border-radius: var(--radius-sm);
}

.list-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.list-content {
    flex: 1;
}

.list-content strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-size: 1.05rem;
}

.list-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    font-size: 0.95rem;
}

.explanation-note {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-md);
}

.note-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.explanation-note p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    font-size: 0.9rem;
}

/* Action Buttons */
.result-actions {
    display: flex;
    gap: var(--gap-md);
    justify-content: center;
    flex-wrap: wrap;
    padding: var(--spacing-xl) 0;
}

.btn-ai {
    background: var(--gradient-accent);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-ai:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

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

.btn-icon {
    font-size: 1.25rem;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.modal-open {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-icon {
    font-size: 1.75rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-xl);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
}

/* Loading State */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    gap: var(--spacing-md);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-state p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* AI Advice Content */
.advice-content {
    color: var(--text-secondary);
    line-height: 1.8;
}

.advice-content h4 {
    color: var(--text-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

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

.advice-content ul {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.advice-content li {
    margin-bottom: var(--spacing-xs);
}

.advice-content strong {
    color: var(--text-primary);
}

.advice-content em {
    color: var(--accent-primary);
}

/* Error State */
.error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    gap: var(--spacing-md);
}

.error-icon {
    font-size: 3rem;
}

.error-state p {
    color: var(--text-secondary);
    text-align: center;
}

/* Responsive Design for Result Page */
@media (max-width: 992px) {
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .prediction-result {
        grid-template-columns: 1fr;
        text-align: center;
        justify-items: center;
    }
    
    .prediction-meta {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .result-main-card {
        padding: var(--spacing-lg);
    }
    
    .prediction-circle {
        width: 160px;
        height: 160px;
    }
    
    .circle-icon {
        font-size: 2.5rem;
    }
    
    .circle-percentage {
        font-size: 1.75rem;
    }
    
    .prediction-status {
        font-size: 2rem;
    }
    
    .result-actions {
        flex-direction: column;
    }
    
    .btn-ai, .btn, .btn-outline {
        width: 100%;
    }
    
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
}