/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --accent: #ec4899;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Neutrals */
    --bg-primary: #0a0a0f;
    --bg-secondary: #13131a;
    --bg-tertiary: #1a1a24;
    --bg-card: rgba(26, 26, 36, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    
    --border: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-accent: linear-gradient(135deg, #ec4899 0%, #f59e0b 100%);
    --gradient-text: linear-gradient(135deg, #6366f1, #ec4899, #f59e0b);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ===========================
   Navigation
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md) 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
}

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

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

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

.btn-github {
    background: var(--gradient-primary);
    color: white !important;
    padding: var(--spacing-xs) var(--spacing-md) !important;
    border-radius: var(--radius-md);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    padding: calc(var(--spacing-3xl) + 60px) 0 var(--spacing-3xl);
    position: relative;
    overflow: visible;
}

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

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    max-width: 600px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-glass);
    border: 1px solid var(--border);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 2rem;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease-out;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease-out 0.3s both;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

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

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-light);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero Visual */
.hero-visual {
    position: relative;
    width: 100%;
    animation: fadeInRight 0.8s ease-out 0.5s both;
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

.window-dots {
    display: flex;
    gap: 6px;
}

.window-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-tertiary);
}

.window-dots span:nth-child(1) { background: #ef4444; }
.window-dots span:nth-child(2) { background: #f59e0b; }
.window-dots span:nth-child(3) { background: #10b981; }

.window-title {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.window-content {
    padding: var(--spacing-md);
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    max-height: none;
    overflow-y: auto;
    min-height: auto;
}

.code-line {
    margin-bottom: 0.5rem;
}

.prompt {
    color: var(--primary-light);
    margin-right: 0.5rem;
}

.output {
    color: var(--text-secondary);
    padding-left: 1.5rem;
}

.output.success {
    color: var(--success);
}

.cursor {
    color: var(--primary-light);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

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

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    background: var(--bg-glass);
    border-color: var(--border-hover);
}

/* ===========================
   Features Section
   =========================== */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

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

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

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

/* ===========================
   Installation Section
   =========================== */
.installation {
    padding: var(--spacing-3xl) 0;
}

.install-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.install-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: var(--transition);
}

.install-card:hover {
    border-color: var(--primary);
}

.install-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.install-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.install-badge {
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.code-block {
    position: relative;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    overflow-x: auto;
}

.code-block code {
    color: var(--primary-light);
}

.copy-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}

.copy-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* ===========================
   Usage Section
   =========================== */
.usage {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.usage-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.step-card {
    display: flex;
    gap: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: var(--transition);
}

.step-card:hover {
    border-color: var(--primary);
    transform: translateX(8px);
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

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

.step-content .code-block {
    margin-bottom: var(--spacing-sm);
}

.commit-types {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.commit-type {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-family: 'Courier New', monospace;
}

/* ===========================
   Commit Reference Section
   =========================== */
.commit-reference {
    padding: var(--spacing-3xl) 0;
}

.reference-table {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.table-header,
.table-row {
    display: grid;
    grid-template-columns: 1fr 1fr 2fr 2fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    align-items: center;
}

.table-header {
    background: var(--bg-tertiary);
    font-weight: 700;
    border-bottom: 1px solid var(--border);
}

.table-row {
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.table-row:last-child {
    border-bottom: none;
}

.table-row:hover {
    background: var(--bg-glass);
}

.table-row code {
    background: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-family: 'Courier New', monospace;
    color: var(--primary-light);
}

/* ===========================
   Releases Section
   =========================== */
.releases {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.releases-timeline {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.release-item {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition);
}

.release-item:hover {
    border-color: var(--primary);
    transform: translateX(8px);
}

.release-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.release-version {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: var(--spacing-xs);
}

.release-date {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.release-type {
    display: inline-block;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.release-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

.releases-cta {
    text-align: center;
}

/* ===========================
   CTA Section
   =========================== */
.cta {
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

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

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

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: var(--spacing-md);
    line-height: 1.7;
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

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

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.footer-badges {
    display: flex;
    gap: var(--spacing-sm);
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .hero-visual {
        display: block;
        margin-top: var(--spacing-2xl);
    }
    
    .hero-content {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        padding: calc(var(--spacing-2xl) + 60px) 0 var(--spacing-2xl);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .features-grid,
    .install-options {
        grid-template-columns: 1fr;
    }
    
    .step-card {
        flex-direction: column;
    }
    
    .table-header,
    .table-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
    
    .table-header {
        display: none;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}