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

:root {
    --primary-bg: #0a0e1a;
    --secondary-bg: #111827;
    --card-bg: #1a1f2e;
    --accent-green: #10b981;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-subtle: rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --gradient-primary: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
    --gradient-card: linear-gradient(145deg, rgba(26, 31, 46, 0.8), rgba(17, 24, 39, 0.9));
}

html {
    scroll-behavior: smooth;
    height: 100%;
}

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

/* Background Effects */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    pointer-events: none;
}

#grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.02;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}

/* Navigation */
.premium-nav {
    position: fixed;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 60px;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.brand-name {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.brand-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 400;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: all 0.2s ease;
    position: relative;
}

.nav-links a:hover {
    color: var(--accent-green);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

.github-link {
    background: var(--card-bg);
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    transition: all 0.2s ease;
}

.github-link:hover {
    background: var(--accent-green);
    color: white;
    border-color: var(--accent-green);
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 60px 60px;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 30% 20%, rgba(16, 185, 129, 0.15), transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(59, 130, 246, 0.15), transparent 50%);
    animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% { opacity: 0.5; transform: scale(1); }
    100% { opacity: 0.8; transform: scale(1.05); }
}

.hero-content {
    flex: 1;
    max-width: 700px;
    z-index: 10;
}

.hero-badge {
    display: inline-block;
    margin-bottom: 24px;
}

.badge-text {
    background: var(--gradient-primary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.hero-title {
    margin-bottom: 24px;
}

.title-apollo {
    display: block;
    font-size: 5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.title-subtitle {
    display: block;
    font-size: 1.8rem;
    font-weight: 300;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
    max-width: 600px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-green);
    font-family: 'JetBrains Mono', monospace;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
    position: relative;
    padding: 14px 32px;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(16, 185, 129, 0.4);
}

.btn-glow {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.btn-primary:hover .btn-glow {
    left: 100%;
}

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

.btn-secondary:hover {
    border-color: var(--accent-green);
    color: var(--accent-green);
    transform: translateY(-2px);
}

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

.floating-cube {
    width: 120px;
    height: 120px;
    position: relative;
    transform-style: preserve-3d;
    animation: rotateCube 20s infinite linear;
}

.cube-face {
    position: absolute;
    width: 120px;
    height: 120px;
    background: var(--gradient-card);
    border: 2px solid var(--accent-green);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.cube-face.front { transform: rotateY(0deg) translateZ(60px); }
.cube-face.back { transform: rotateY(180deg) translateZ(60px); }
.cube-face.right { transform: rotateY(90deg) translateZ(60px); }
.cube-face.left { transform: rotateY(-90deg) translateZ(60px); }
.cube-face.top { transform: rotateX(90deg) translateZ(60px); }
.cube-face.bottom { transform: rotateX(-90deg) translateZ(60px); }

@keyframes rotateCube {
    0% { transform: rotateX(0deg) rotateY(0deg); }
    100% { transform: rotateX(360deg) rotateY(360deg); }
}

/* Features Section */
.features-section {
    padding: 120px 60px;
    background: var(--secondary-bg);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--gradient-card);
    padding: 40px 32px;
    border-radius: 20px;
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: translateX(-100%);
    transition: transform 0.5s ease;
}

.feature-card:hover::before {
    transform: translateX(0);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(16, 185, 129, 0.3);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 24px;
    display: block;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

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

/* Installation Section */
.installation-section {
    padding: 120px 60px;
    background: var(--primary-bg);
}

.installation-steps {
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto 60px;
    gap: 0;
}

.step-card {
    background: var(--gradient-card);
    padding: 32px 24px;
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
    text-align: center;
    flex: 1;
    max-width: 280px;
    position: relative;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
    margin: 0 auto 20px;
    font-family: 'JetBrains Mono', monospace;
}

.step-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.step-content code {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
}

.step-connector {
    width: 60px;
    height: 2px;
    background: var(--gradient-primary);
    margin: 0 -1px;
    position: relative;
    z-index: 1;
}

.installation-note {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 12px;
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 16px;
}

.note-icon {
    font-size: 24px;
    color: var(--accent-blue);
}

.installation-note p {
    color: var(--text-secondary);
    margin: 0;
}

/* Download Section */
.download-section {
    padding: 120px 60px;
    background: var(--secondary-bg);
    text-align: center;
}

.download-container {
    background: var(--gradient-card);
    border: 1px solid var(--border-subtle);
    border-radius: 24px;
    padding: 48px;
    max-width: 700px;
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
}

.download-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.download-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 40px;
}

.download-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.detail-label {
    color: var(--text-muted);
    font-weight: 500;
}

.detail-value {
    color: var(--text-primary);
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
}

.download-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 32px;
}

.btn-download, .btn-github {
    padding: 16px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.btn-download {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.3);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(16, 185, 129, 0.4);
}

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

.btn-github:hover {
    border-color: var(--accent-green);
    color: var(--accent-green);
    transform: translateY(-2px);
}

.download-checksum {
    padding: 16px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
}

.checksum-label {
    color: var(--text-muted);
    margin-right: 8px;
}

.checksum-value {
    color: var(--accent-green);
}

/* Footer */
.premium-footer {
    background: var(--primary-bg);
    border-top: 1px solid var(--border-subtle);
    padding: 60px 60px 40px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 32px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
}

.footer-brand span {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--accent-green);
}

.footer-legal {
    color: var(--text-muted);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .premium-nav {
        padding: 16px 32px;
    }
    
    .hero-section {
        padding: 100px 32px 40px;
        flex-direction: column;
        text-align: center;
        gap: 60px;
    }
    
    .title-apollo {
        font-size: 4rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-section,
    .installation-section,
    .download-section {
        padding: 80px 32px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .installation-steps {
        flex-direction: column;
        gap: 32px;
    }
    
    .step-connector {
        width: 2px;
        height: 40px;
        margin: -1px 0;
    }
    
    .download-details {
        grid-template-columns: 1fr;
    }
    
    .download-actions {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
    }
    
    .title-apollo {
        font-size: 3rem;
    }
    
    .title-subtitle {
        font-size: 1.5rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .download-container {
        padding: 32px 24px;
    }
}