/* Apple-esque Dark Theme for Nine Belts Program */

:root {
    /* Apple Color Palette */
    --primary-bg: #000000;
    --secondary-bg: #1c1c1e;
    --tertiary-bg: #2c2c2e;
    --quaternary-bg: #3a3a3c;
    --surface-bg: rgba(44, 44, 46, 0.8);
    
    /* Text Colors */
    --primary-text: #ffffff;
    --secondary-text: #ebebf5;
    --tertiary-text: #ebebf599;
    --quaternary-text: #ebebf54d;
    
    /* Accent Colors */
    --accent-blue: #007aff;
    --accent-blue-hover: #0056d6;
    --accent-green: #30d158;
    --accent-orange: #ff9f0a;
    --accent-red: #ff453a;
    --accent-purple: #bf5af2;
    --accent-pink: #ff375f;
    --accent-yellow: #ffd60a;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --gradient-secondary: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
    --gradient-accent: linear-gradient(135deg, var(--accent-orange), var(--accent-pink));
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Typography */
    --font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, 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;
    
    /* Border Radius */
    --border-radius-sm: 6px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15), 0 8px 10px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0.0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0.0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    background-color: var(--primary-bg);
    color: var(--primary-text);
    line-height: 1.6;
    font-weight: 400;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Background Container */
.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.floating-element {
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.03) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s infinite linear;
}

.floating-element:nth-child(1) {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
    animation-duration: 25s;
}

.floating-element:nth-child(2) {
    top: 20%;
    right: 15%;
    animation-delay: -5s;
    animation-duration: 30s;
}

.floating-element:nth-child(3) {
    bottom: 30%;
    left: 20%;
    animation-delay: -10s;
    animation-duration: 35s;
}

.floating-element:nth-child(4) {
    bottom: 20%;
    right: 20%;
    animation-delay: -15s;
    animation-duration: 28s;
}

.floating-element:nth-child(5) {
    top: 50%;
    left: 50%;
    animation-delay: -20s;
    animation-duration: 22s;
    transform: translate(-50%, -50%);
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.005) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.005) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 40s linear infinite;
}

@keyframes float {
    0%, 100% { 
        transform: translate(0, 0) rotate(0deg); 
    }
    33% { 
        transform: translate(-30px, -30px) rotate(120deg); 
    }
    66% { 
        transform: translate(30px, -20px) rotate(240deg); 
    }
}

@keyframes gridMove {
    0% { 
        transform: translate(0, 0); 
    }
    100% { 
        transform: translate(50px, 50px); 
    }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    transition: all var(--transition-base);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--primary-text);
    text-decoration: none;
}

.nav-icon {
    font-size: var(--font-size-2xl);
    color: var(--accent-blue);
}

.nav-links {
    display: none;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--secondary-text);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

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

.nav-toggle {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--primary-text);
    transition: all var(--transition-base);
    transform-origin: center;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
    
    .nav-toggle {
        display: none;
    }
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    z-index: 10;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-subtitle {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 300;
    margin-top: var(--spacing-sm);
    color: var(--secondary-text);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--tertiary-text);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: var(--surface-bg);
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--accent-blue);
    display: block;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--tertiary-text);
    margin-top: var(--spacing-xs);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: var(--font-size-6xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-3xl);
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    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, 0.1), transparent);
    transition: left var(--transition-slow);
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: var(--primary-text);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: var(--tertiary-bg);
    color: var(--primary-text);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: var(--quaternary-bg);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Overview Section */
.overview {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.overview-card {
    background: var(--surface-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.overview-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

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

.overview-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    font-size: var(--font-size-3xl);
    color: var(--accent-blue);
    margin-bottom: var(--spacing-lg);
}

.overview-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--primary-text);
}

.overview-card p {
    color: var(--tertiary-text);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.feature-list {
    list-style: none;
    space: var(--spacing-sm);
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--secondary-text);
    margin-bottom: var(--spacing-sm);
}

.feature-list i {
    color: var(--accent-green);
    font-size: var(--font-size-sm);
}

/* Library Integration Section */
.library-integration {
    padding: var(--spacing-3xl) 0;
    background: var(--secondary-bg);
}

.integration-flow {
    margin-bottom: var(--spacing-3xl);
}

.flow-step {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: var(--surface-bg);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    position: relative;
}

.step-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--accent-blue);
    padding: var(--spacing-md);
    background: rgba(0, 122, 255, 0.1);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(0, 122, 255, 0.2);
}

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

.step-content p {
    color: var(--tertiary-text);
    line-height: 1.6;
}

.step-icon {
    font-size: var(--font-size-2xl);
    color: var(--accent-purple);
}

.integration-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.metric-card {
    background: var(--surface-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.metric-card:hover::before {
    opacity: 0.05;
}

.metric-value {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--accent-blue);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.metric-label {
    color: var(--tertiary-text);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* Belts Section */
.belts-grid {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
}

.belts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
}

/* Belt Card Styles */
.belt-card {
    background: var(--surface-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.belt-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--belt-color, var(--gradient-primary));
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

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

.belt-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.belt-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.belt-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--belt-color, var(--gradient-primary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    color: var(--primary-text);
}

.belt-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-text);
}

.belt-subtitle {
    font-size: var(--font-size-base);
    color: var(--tertiary-text);
    font-weight: 400;
}

.belt-mission {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--belt-color, var(--accent-blue));
}

.belt-mission h4 {
    color: var(--accent-blue);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.belt-mission p {
    color: var(--secondary-text);
    line-height: 1.6;
}

.belt-details {
    margin-bottom: var(--spacing-lg);
}

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

.belt-section h5 {
    color: var(--primary-text);
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.belt-section i {
    color: var(--belt-color, var(--accent-blue));
    font-size: var(--font-size-sm);
}

.belt-section p,
.belt-section ul {
    color: var(--tertiary-text);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.belt-section ul {
    list-style: none;
    padding-left: var(--spacing-md);
}

.belt-section li {
    position: relative;
    margin-bottom: var(--spacing-xs);
}

.belt-section li::before {
    content: '•';
    color: var(--belt-color, var(--accent-blue));
    position: absolute;
    left: -var(--spacing-md);
}

.belt-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.metric-badge {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.metric-badge .value {
    font-weight: 700;
    color: var(--belt-color, var(--accent-blue));
    font-size: var(--font-size-sm);
    display: block;
}

.metric-badge .label {
    color: var(--quaternary-text);
    font-size: var(--font-size-xs);
}

.belt-action {
    text-align: center;
}

.belt-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--belt-color, var(--gradient-primary));
    color: var(--primary-text);
    text-decoration: none;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
}

.belt-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Metrics Section */
.metrics-section {
    padding: var(--spacing-3xl) 0;
    background: var(--secondary-bg);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.metric-category {
    background: var(--surface-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.metric-category h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-text);
}

.metric-category i {
    color: var(--accent-blue);
}

.metric-items {
    space: var(--spacing-md);
}

.metric-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.metric-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.metric-name {
    color: var(--secondary-text);
    font-weight: 500;
}

.metric-target {
    color: var(--accent-green);
    font-weight: 700;
    font-size: var(--font-size-sm);
}

/* Timeline Section */
.literacy-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
}

.literacy-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.literacy-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-3xl);
    position: relative;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-item:nth-child(even) .timeline-content {
    text-align: right;
}

.timeline-marker {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-text);
    font-size: var(--font-size-lg);
    position: relative;
    z-index: 10;
    margin: 0 var(--spacing-xl);
}

.timeline-content {
    flex: 1;
    background: var(--surface-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.timeline-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-text);
}

.timeline-belts {
    color: var(--accent-blue);
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.timeline-content p {
    color: var(--tertiary-text);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .literacy-timeline::before {
        left: 30px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        flex-direction: row;
    }
    
    .timeline-item:nth-child(even) .timeline-content {
        text-align: left;
    }
    
    .timeline-marker {
        margin: 0 var(--spacing-md) 0 0;
    }
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--secondary-bg), var(--tertiary-bg));
    text-align: center;
}

.cta-content h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-content p {
    font-size: var(--font-size-lg);
    color: var(--tertiary-text);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: var(--primary-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-2xl) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    align-items: center;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    justify-content: center;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary-text);
}

.footer-brand i {
    color: var(--accent-blue);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

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

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

.footer-credits {
    color: var(--quaternary-text);
    font-size: var(--font-size-sm);
}

.footer-credits strong {
    color: var(--accent-blue);
}

@media (min-width: 768px) {
    .footer-content {
        text-align: left;
    }
    
    .footer-brand {
        justify-content: flex-start;
    }
    
    .footer-links {
        justify-content: center;
    }
}

/* Animation Classes */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease-out forwards;
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    animation: fadeInLeft 0.8s ease-out forwards;
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    animation: fadeInRight 0.8s ease-out forwards;
}

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

@keyframes fadeInLeft {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-xl);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .overview-grid,
    .belts-container {
        grid-template-columns: 1fr;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .flow-step {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .step-number {
        justify-self: center;
    }
    
    .step-icon {
        justify-self: center;
    }
}

/* Belt Color Variables */
.gray-belt { --belt-color: #8E8E93; }
.white-belt { --belt-color: #FFFFFF; }
.yellow-belt { --belt-color: #FFD60A; }
.orange-belt { --belt-color: #FF9F0A; }
.green-belt { --belt-color: #30D158; }
.blue-belt { --belt-color: #007AFF; }
.brown-belt { --belt-color: #A2845E; }
.red-belt { --belt-color: #FF453A; }
.black-belt { --belt-color: #1C1C1E; }

/* Scroll Behavior */
html {
    scroll-padding-top: 70px;
}