:root {
    --bg: #111113;
    --bg-sidebar: #18181b;
    --surface: #1e1e22;
    --border: #2a2a2e;
    --border-hover: #3a3a3e;
    --text: #ececef;
    --text-secondary: #a1a1aa;
    --text-dim: #71717a;
    --accent: #f97316;
    --accent-hover: #fb923c;
    --accent-subtle: rgba(249, 115, 22, 0.1);
    --green: #4ade80;
    --red: #f87171;
    --yellow: #fbbf24;
    --code-bg: #0f0f11;
    --code-border: #252529;
    --purple: #c084fc;
    --blue: #60a5fa;
    --teal: #34d399;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

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

code {
    font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 0.875em;
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 4px;
    padding: 2px 6px;
}

pre {
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 8px;
    padding: 20px 24px;
    overflow-x: auto;
    font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
    font-size: 13px;
    line-height: 1.7;
    margin: 16px 0 24px;
}
pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: inherit;
}

/* syntax colors */
.kw { color: var(--purple); }
.fn { color: var(--blue); }
.str { color: var(--teal); }
.cmt { color: var(--text-dim); }

/* ---- top nav ---- */

.topnav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(17, 17, 19, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
}
.topnav-inner {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.topnav .logo {
    font-size: 17px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.3px;
}
.topnav .logo span { color: var(--accent); }
.topnav-links {
    display: flex;
    gap: 28px;
    align-items: center;
}
.topnav-links a {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.15s;
}
.topnav-links a:hover { color: var(--text); text-decoration: none; }
.topnav-links a.active { color: var(--text); }

/* ---- layout ---- */

.page-layout {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    min-height: calc(100vh - 56px);
}

/* sidebar */
.sidebar {
    width: 240px;
    flex-shrink: 0;
    border-right: 1px solid var(--border);
    padding: 32px 24px 48px 24px;
    position: sticky;
    top: 56px;
    height: calc(100vh - 56px);
    overflow-y: auto;
}
.sidebar-section {
    margin-bottom: 28px;
}
.sidebar-section h4 {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-dim);
    margin-bottom: 10px;
}
.sidebar-section a {
    display: block;
    color: var(--text-secondary);
    font-size: 13.5px;
    padding: 4px 0;
    transition: color 0.15s;
}
.sidebar-section a:hover { color: var(--text); text-decoration: none; }
.sidebar-section a.active {
    color: var(--accent);
}

/* main content */
.main-content {
    flex: 1;
    min-width: 0;
    padding: 40px 56px 80px;
    max-width: 820px;
}

/* ---- hero (landing page only) ---- */

.hero {
    padding: 80px 0 60px;
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
}
.hero h1 {
    font-size: 52px;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.1;
    margin-bottom: 20px;
}
.hero h1 span { color: var(--accent); }
.hero .tagline {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 36px;
}
.hero .install-box {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 28px;
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 15px;
    cursor: pointer;
    transition: border-color 0.2s;
    position: relative;
    user-select: none;
}
.hero .install-box:hover { border-color: var(--accent); }
.hero .install-box .dollar { color: var(--text-dim); }
.hero .install-box .copy-hint {
    position: absolute;
    top: -32px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 10px;
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s;
}
.hero .install-box:hover .copy-hint { opacity: 1; }
.hero .install-box.copied .copy-hint {
    opacity: 1;
    color: var(--green);
}

/* ---- content typography ---- */

.main-content h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
}
.main-content h1 + .subtitle {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 40px;
}

.main-content h2 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.3px;
    margin-top: 48px;
    margin-bottom: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.main-content h2:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

.main-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 10px;
    color: var(--accent);
}

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

.main-content ul, .main-content ol {
    color: var(--text-secondary);
    margin-bottom: 16px;
    padding-left: 24px;
}
.main-content li { margin-bottom: 6px; }
.main-content li code { font-size: 12px; }

.main-content strong { color: var(--text); font-weight: 600; }

/* ---- feature grid ---- */

.features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin: 24px 0;
}
.feature {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    transition: border-color 0.2s;
}
.feature:hover { border-color: var(--border-hover); }
.feature h3 {
    font-size: 14px;
    font-weight: 600;
    margin: 0 0 6px;
    color: var(--text);
}
.feature p {
    font-size: 13.5px;
    color: var(--text-dim);
    margin: 0;
    line-height: 1.5;
}

/* ---- terminal ---- */

.terminal {
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 8px;
    padding: 20px 24px;
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 13px;
    line-height: 1.7;
    margin: 16px 0 24px;
}
.terminal .pass { color: var(--green); }
.terminal .fail { color: var(--red); }
.terminal .dim { color: var(--text-dim); }
.terminal .warn { color: var(--yellow); }

/* ---- tables ---- */

table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0 24px;
    font-size: 13.5px;
}
th {
    text-align: left;
    padding: 10px 14px;
    border-bottom: 2px solid var(--border);
    color: var(--text);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
td {
    padding: 9px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}
tr:hover td { background: rgba(255,255,255,0.02); }

/* ---- special blocks ---- */

.file-tree {
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 8px;
    padding: 20px 24px;
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 13px;
    line-height: 1.9;
    margin: 16px 0 24px;
    color: var(--text-secondary);
    white-space: pre;
    overflow-x: auto;
}
.file-tree .dir { color: var(--accent); font-weight: 600; }
.file-tree .desc { color: var(--text-dim); }

.flow-diagram {
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 8px;
    padding: 28px 24px;
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 13px;
    line-height: 1.5;
    margin: 16px 0 24px;
    overflow-x: auto;
    white-space: pre;
}
.flow-diagram .arrow { color: var(--accent); }
.flow-diagram .dim { color: var(--text-dim); }

/* ---- sections (landing page) ---- */

section {
    padding: 56px 0;
    border-top: 1px solid var(--border);
}
section h2 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    border-top: none;
    padding-top: 0;
}
section p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 15px;
}

/* ---- footer ---- */

footer {
    border-top: 1px solid var(--border);
    padding: 32px 24px;
    text-align: center;
    color: var(--text-dim);
    font-size: 13px;
}
footer a { color: var(--text-secondary); }
footer a:hover { color: var(--text); }

/* ---- responsive ---- */

@media (max-width: 900px) {
    .sidebar { display: none; }
    .main-content { padding: 32px 24px 64px; }
}
@media (max-width: 640px) {
    .hero h1 { font-size: 36px; }
    .hero .tagline { font-size: 16px; }
    .features { grid-template-columns: 1fr; }
    .topnav-links { gap: 16px; }
}