/* CSS Variables */
:root {
    --bg-primary: #0D1117;
    --bg-secondary: #161B22;
    --bg-tertiary: #21262D;
    --accent-blue: #58A6FF;
    --accent-green: #2EA043;
    --accent-purple: #8B5CF6;
    --text-primary: #C9D1D9;
    --text-secondary: #8B949E;
    --text-muted: #6E7681;
    --border-color: #30363D;
    --glow-blue: rgba(88, 166, 255, 0.4);
    --glow-green: rgba(46, 160, 67, 0.4);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 18px;
}

.nav-logo .logo-icon {
    font-family: var(--font-mono);
    color: var(--accent-blue);
    font-size: 16px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.nav-github {
    display: flex;
    align-items: center;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
}

.nav-github:hover {
    background-color: var(--bg-secondary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 64px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(88, 166, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(88, 166, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    animation: fadeInUp 0.8s ease-out;
}

.terminal-prompt {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 20px;
    font-family: var(--font-mono);
    font-size: 14px;
    margin-bottom: 24px;
}

.prompt-symbol {
    color: var(--accent-green);
}

.typing-text {
    color: var(--text-primary);
}

.cursor {
    animation: blink 1s step-end infinite;
    color: var(--accent-blue);
}

@keyframes blink {
    50% { opacity: 0; }
}

.hero-title {
    font-size: 72px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: 24px;
    font-weight: 500;
    color: var(--accent-blue);
    margin-bottom: 20px;
    font-family: var(--font-mono);
}

.hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 40px;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: #79b8ff;
    box-shadow: 0 8px 32px var(--glow-blue);
    transform: translateY(-2px);
}

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

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

.btn-large {
    padding: 18px 36px;
    font-size: 18px;
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease-out 0.3s both;
}

.app-icon-container {
    position: relative;
}

.app-icon {
    width: 280px;
    height: 280px;
    background: linear-gradient(145deg, var(--bg-secondary), var(--bg-tertiary));
    border-radius: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.icon-shield {
    width: 180px;
    height: 200px;
    background: linear-gradient(180deg, rgba(88, 166, 255, 0.1), rgba(46, 160, 67, 0.1));
    border: 2px solid;
    border-image: linear-gradient(180deg, var(--accent-blue), var(--accent-green)) 1;
    clip-path: polygon(50% 0%, 100% 15%, 100% 75%, 50% 100%, 0% 75%, 0% 15%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.circuit-lines {
    position: absolute;
    inset: 0;
    opacity: 0.3;
    background-image: 
        linear-gradient(90deg, transparent 48%, var(--accent-blue) 48%, var(--accent-blue) 52%, transparent 52%),
        linear-gradient(0deg, transparent 48%, var(--accent-green) 48%, var(--accent-green) 52%, transparent 52%);
    background-size: 20px 20px;
}

.chevrons {
    font-family: var(--font-mono);
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 1;
    text-shadow: 0 0 40px var(--glow-blue);
}

.glow-effect {
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--glow-blue) 0%, transparent 70%);
    filter: blur(60px);
    z-index: -1;
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 12px;
    animation: fadeIn 1s ease-out 1s both;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: rotate(45deg);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: rotate(45deg) translate(0, 0); }
    50% { transform: rotate(45deg) translate(5px, 5px); }
}

/* Section Styling */
section {
    padding: 120px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 80px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--accent-blue);
    margin-bottom: 16px;
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.section-description {
    font-size: 18px;
    color: var(--text-secondary);
}

/* Features Section */
.features {
    background: var(--bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.1), rgba(46, 160, 67, 0.1));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: var(--accent-blue);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Screenshots Section */
.screenshots {
    background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    align-items: end;
}

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

.screenshot-item.featured {
    transform: scale(1.1);
}

.screenshot-placeholder {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    aspect-ratio: 9/16;
    max-width: 280px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    overflow: hidden;
}

.screenshot-item:hover .screenshot-placeholder {
    border-color: var(--accent-blue);
    box-shadow: 0 20px 60px rgba(88, 166, 255, 0.2);
}

.placeholder-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    color: var(--text-muted);
}

.placeholder-content svg {
    width: 64px;
    height: 64px;
    opacity: 0.5;
}

.placeholder-content span {
    font-size: 14px;
    font-weight: 500;
}

.screenshot-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Specs Section */
.specs {
    background: var(--bg-secondary);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.spec-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
    transition: all 0.3s ease;
}

.spec-card:hover {
    border-color: var(--accent-green);
}

.spec-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.spec-icon svg {
    width: 40px;
    height: 40px;
    color: var(--accent-green);
}

.spec-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.spec-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* Terminal Demo */
.terminal-demo {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    max-width: 700px;
    margin: 0 auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.terminal-header {
    background: var(--bg-tertiary);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.terminal-buttons {
    display: flex;
    gap: 8px;
}

.terminal-buttons span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.btn-close { background: #ff5f56; }
.btn-minimize { background: #ffbd2e; }
.btn-maximize { background: #27c93f; }

.terminal-title {
    flex: 1;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.terminal-body {
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 2;
}

.terminal-line {
    white-space: nowrap;
}

.terminal-line .prompt {
    color: var(--accent-green);
    margin-right: 8px;
}

.terminal-line .prompt-remote {
    color: var(--accent-blue);
    margin-right: 8px;
}

.terminal-line.dim {
    color: var(--text-muted);
}

.terminal-line.success {
    color: var(--accent-green);
}

.typing-cmd {
    color: var(--text-primary);
}

/* CTA Section */
.cta {
    background: linear-gradient(180deg, var(--bg-secondary), var(--bg-primary));
    text-align: center;
    padding: 100px 0;
}

.cta-content h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* Footer */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 40px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-brand .logo-icon {
    font-family: var(--font-mono);
    color: var(--accent-blue);
}

.footer-brand .logo-text {
    font-weight: 600;
    font-size: 18px;
}

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

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
}

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

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}

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

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

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }

    .hero-text {
        order: 1;
    }

    .hero-visual {
        order: 0;
    }

    .hero-description {
        margin: 0 auto 40px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-title {
        font-size: 56px;
    }

    .screenshots-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .screenshot-item.featured {
        transform: none;
    }

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

@media (max-width: 768px) {
    .nav-links a:not(.nav-github) {
        display: none;
    }

    .hero {
        padding-top: 80px;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-tagline {
        font-size: 18px;
    }

    .hero-description {
        font-size: 16px;
    }

    .app-icon {
        width: 200px;
        height: 200px;
        border-radius: 48px;
    }

    .icon-shield {
        width: 120px;
        height: 140px;
    }

    .chevrons {
        font-size: 32px;
    }

    section {
        padding: 80px 0;
    }

    .section-title {
        font-size: 32px;
    }

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

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .footer-content {
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px 24px;
    }

    .terminal-demo {
        margin: 0 -12px;
        border-radius: var(--radius-md);
    }

    .terminal-body {
        padding: 16px;
        font-size: 12px;
        overflow-x: auto;
    }

    .cta-content h2 {
        font-size: 28px;
    }
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}