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

:root {
    --bg: #0f1117;
    --bg-raised: #181a23;
    --bg-code: #12131c;
    --text: #d1d5e0;
    --text-muted: #8b90a0;
    --text-bright: #eef0f6;
    --accent: #6c9eff;
    --accent-hover: #8bb4ff;
    --border: #262938;
    --code-green: #7ec699;
    --code-yellow: #e5c07b;
    --code-purple: #c792ea;
    --code-red: #f07178;
    --code-comment: #5c6370;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
    --max-width: 960px;
    --nav-height: 56px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 24px);
}

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    color: var(--accent-hover);
}

/* ── Navigation ────────────────────────────────────────── */

.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: var(--nav-height);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 18px;
    font-weight: 700;
    color: var(--text-bright);
    letter-spacing: -0.02em;
}

.nav-logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 28px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    font-size: 14px;
    transition: color 0.15s;
}

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

.nav-github {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-github svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 4px;
}

.nav-toggle svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

/* ── Sections ──────────────────────────────────────────── */

section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 12px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 24px;
    line-height: 1.25;
}

/* ── Hero ──────────────────────────────────────────────── */

.hero {
    padding-top: 100px;
    padding-bottom: 80px;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-bright);
    letter-spacing: -0.03em;
    margin-bottom: 8px;
}

.hero h1 span {
    color: var(--accent);
}

.hero-tagline {
    font-size: 20px;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.5;
}

.hero-code {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px 28px;
    max-width: 480px;
    margin: 0 auto 32px;
    text-align: left;
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.8;
}

.hero-code .prompt {
    color: var(--code-green);
    user-select: none;
}

.hero-code .cmd {
    color: var(--text-bright);
}

.hero-code .flag {
    color: var(--code-yellow);
}

.hero-code .comment {
    color: var(--code-comment);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.15s, color 0.15s;
}

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

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

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

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

.btn svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

.hero-warning {
    margin-top: 32px;
    font-size: 13px;
    color: var(--text-muted);
    font-style: italic;
}

/* ── Story ─────────────────────────────────────────────── */

.story {
    border-top: 1px solid var(--border);
}

.story p {
    margin-bottom: 16px;
}

.story p:last-child {
    margin-bottom: 0;
}

.story code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--bg-raised);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--code-green);
}

.story a {
    border-bottom: 1px solid var(--accent);
}

.story a:hover {
    border-bottom-color: var(--accent-hover);
}

/* ── Features ──────────────────────────────────────────── */

.features {
    border-top: 1px solid var(--border);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 24px;
}

.feature-card-icon {
    font-size: 20px;
    margin-bottom: 10px;
}

.feature-card h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-bright);
    margin-bottom: 6px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ── Services ──────────────────────────────────────────── */

.services {
    border-top: 1px solid var(--border);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.service-item {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 14px 16px;
}

.service-item h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-bright);
    margin-bottom: 4px;
}

.service-item .ports {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
}

/* ── Installation ──────────────────────────────────────── */

.installation {
    border-top: 1px solid var(--border);
}

.install-paths {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.install-path {
    display: flex;
    flex-direction: column;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 28px;
}

.install-path-header {
    margin-bottom: 16px;
}

.install-path-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-bright);
    margin-bottom: 8px;
}

.install-path-header p {
    font-size: 14px;
    color: var(--text-muted);
}

.install-path-header a {
    border-bottom: 1px solid var(--accent);
}

.install-path-header a:hover {
    border-bottom-color: var(--accent-hover);
}

.install-path pre {
    flex: 1;
    margin-bottom: 0;
}

.install-prereq h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-bright);
    margin-bottom: 8px;
}

.install-prereq p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

/* ── Code blocks ───────────────────────────────────────── */

pre {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 16px 20px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.7;
    margin-bottom: 16px;
}

pre:last-child {
    margin-bottom: 0;
}

pre .prompt {
    color: var(--code-green);
    user-select: none;
}

pre .cmd {
    color: var(--text-bright);
}

pre .flag {
    color: var(--code-yellow);
}

pre .comment {
    color: var(--code-comment);
}

pre .output {
    color: var(--text-muted);
}

/* ── Usage ─────────────────────────────────────────────── */

.usage {
    border-top: 1px solid var(--border);
}

.usage-block {
    margin-bottom: 36px;
}

.usage-block:last-child {
    margin-bottom: 0;
}

.usage-block h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-bright);
    margin-bottom: 8px;
}

.usage-block > p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

/* ── Footer ────────────────────────────────────────────── */

.footer {
    border-top: 1px solid var(--border);
    padding: 40px 24px;
    text-align: center;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer p {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.footer a {
    color: var(--text-muted);
    border-bottom: 1px solid transparent;
}

.footer a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ── Responsive ────────────────────────────────────────── */

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 16px 24px;
        gap: 16px;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .hero {
        padding-top: 64px;
        padding-bottom: 56px;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero-tagline {
        font-size: 17px;
    }

    section {
        padding: 56px 20px;
    }

    .section-title {
        font-size: 26px;
    }

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

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

    .install-paths {
        grid-template-columns: 1fr;
    }

    pre {
        font-size: 12px;
        padding: 14px 16px;
        word-break: break-all;
        white-space: pre-wrap;
    }
}

@media (max-width: 480px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

    .hero-code {
        font-size: 13px;
        padding: 16px 18px;
    }
}