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

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #161d2e;
    --bg-terminal: #0d1117;
    --border: #1e2a3a;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent: #58a6ff;
    --accent-2: #bc8cff;
    --accent-green: #3fb950;
    --accent-yellow: #d29922;
    --accent-red: #f85149;
    --gradient: linear-gradient(135deg, #58a6ff 0%, #bc8cff 50%, #f778ba 100%);
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', 'JetBrains Mono', monospace;
    --radius: 12px;
    --radius-sm: 8px;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* === Hero === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(88, 166, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 13px;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    margin-bottom: 32px;
    background: rgba(88, 166, 255, 0.05);
}

.hero-title {
    font-size: clamp(3.5rem, 10vw, 7rem);
    font-weight: 800;
    line-height: 1;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

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

.gradient-text .paren {
    -webkit-text-fill-color: rgba(139, 148, 158, 0.5);
    font-weight: 300;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 48px;
    line-height: 1.7;
}

/* === Terminal Block === */
.install-block {
    max-width: 580px;
    margin: 0 auto 40px;
}

.terminal {
    background: var(--bg-terminal);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    text-align: left;
    box-shadow:
        0 0 0 1px rgba(255,255,255,0.03),
        0 8px 40px rgba(0,0,0,0.4);
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: rgba(255,255,255,0.02);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.terminal-dot.red { background: var(--accent-red); }
.terminal-dot.yellow { background: var(--accent-yellow); }
.terminal-dot.green { background: var(--accent-green); }

.terminal-title {
    margin-left: auto;
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.terminal-body {
    padding: 20px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-mono);
    font-size: 15px;
}

.terminal-prompt {
    color: var(--accent-green);
    font-weight: 700;
    user-select: none;
}

.terminal-command {
    color: var(--text-primary);
    flex: 1;
    word-break: break-all;
}

.copy-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}
.copy-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
    background: rgba(255,255,255,0.05);
}
.copy-btn.copied {
    color: var(--accent-green);
    border-color: var(--accent-green);
}

/* === Hero Links === */
.hero-links {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-outline {
    border: 1px solid var(--border);
    color: var(--text-primary);
    background: transparent;
}
.btn-outline:hover {
    border-color: var(--text-muted);
    background: rgba(255,255,255,0.05);
}

.btn-disabled {
    opacity: 0.5;
    cursor: default;
    pointer-events: none;
}

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

/* === Section Common === */
.features, .quickstart, .arch {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 56px;
    letter-spacing: -0.5px;
}

/* === Features Grid === */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: all 0.3s;
}
.feature-card:hover {
    border-color: rgba(88, 166, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* === Quick Start Steps === */
.steps {
    max-width: 680px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.step {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.step-num {
    width: 44px;
    height: 44px;
    min-width: 44px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--accent);
    font-family: var(--font-mono);
}

.step-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 10px;
}

.code-block {
    background: var(--bg-terminal);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--text-primary);
    overflow-x: auto;
}

/* === Arch Grid === */
.arch-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 500px;
    margin: 0 auto;
}

.arch-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    text-align: center;
    transition: all 0.3s;
}
.arch-card:hover {
    border-color: rgba(88, 166, 255, 0.3);
}

.arch-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.arch-name {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 4px;
}

.arch-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* === Footer === */
.footer {
    border-top: 1px solid var(--border);
    padding: 48px 0 32px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 32px;
}

.footer-brand .gradient-text {
    font-size: 1.4rem;
    font-weight: 700;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 4px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}
.footer-links a:hover {
    color: var(--text-primary);
}

.footer-link-disabled {
    color: var(--text-muted);
    font-size: 0.9rem;
    cursor: default;
}

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

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-align: center;
}

/* === Responsive === */
@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }

    .arch-grid {
        grid-template-columns: 1fr;
        max-width: 280px;
    }

    .hero-title {
        letter-spacing: -1px;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .terminal-body {
        font-size: 13px;
        padding: 16px;
    }

    .step {
        flex-direction: column;
        gap: 12px;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
    }
}