:root {
    --bg: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2128;
    --border: #30363d;
    --text: #e6edf3;
    --text-muted: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --green: #3fb950;
    --red: #f85149;
    --orange: #d29922;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif; background: var(--bg); color: var(--text); line-height: 1.65; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }

header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(13,17,23,0.92); backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 0.9rem 4vw;
    display: flex; justify-content: space-between; align-items: center;
}
.logo { display: flex; align-items: center; gap: 0.75rem; }
.logo img { height: 34px; width: auto; display: block; }
.logo-text { display: flex; flex-direction: column; align-items: flex-start; }
.logo-text .brand { font-size: 1.1rem; font-weight: 700; letter-spacing: 0.03em; line-height: 1.1; }
.logo-text .brand span { color: var(--accent); }
.logo-text .tagline { font-size: 0.7rem; color: var(--text-muted); line-height: 1.1; }
nav { display: flex; gap: 1.75rem; align-items: center; }
nav a { font-size: 0.92rem; font-weight: 500; color: var(--text-muted); transition: color 0.2s; }
nav a:hover { color: var(--text); }
nav a.cta { background: var(--accent); color: #0d1117; font-weight: 600; padding: 0.45rem 1.1rem; border-radius: 6px; }
nav a.cta:hover { background: var(--accent-hover); color: #0d1117; }
.mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 5px; }
.mobile-menu-btn span { display: block; width: 24px; height: 2px; background: var(--text); }
@media (max-width: 768px) {
    .logo img { height: 28px; }
    nav { display: none; }
    .mobile-nav-open nav {
        display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0;
        background: rgba(13,17,23,0.98); padding: 1rem 4vw; gap: 1rem;
        border-bottom: 1px solid var(--border); align-items: flex-start;
    }
}

main { padding: calc(110px + 2vw) 4vw 4vw; max-width: 860px; margin: 0 auto; min-height: 70vh; }
main.wide { max-width: 1080px; }

h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; letter-spacing: -0.015em; margin-bottom: 0.75rem; }
h1 span { color: var(--accent); }
.lede { color: var(--text-muted); font-size: 1.1rem; margin-bottom: 2.5rem; }
h2 { font-size: 1.45rem; font-weight: 700; margin: 2.5rem 0 1rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--border); }
h3 { font-size: 1.1rem; font-weight: 600; margin: 1.75rem 0 0.6rem; color: var(--accent-hover); }
p { margin-bottom: 1rem; color: var(--text); }
p.muted { color: var(--text-muted); }
ul, ol { margin: 0 0 1.25rem 1.4rem; }
li { margin-bottom: 0.4rem; }
code { font-family: 'JetBrains Mono', monospace; font-size: 0.85em; color: var(--accent); background: var(--bg-secondary); padding: 0.15rem 0.4rem; border-radius: 4px; border: 1px solid var(--border); }
pre { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 8px; padding: 1.1rem 1.25rem; overflow-x: auto; margin: 0 0 1.25rem; line-height: 1.55; }
pre code { background: none; border: none; padding: 0; color: var(--text); font-size: 0.85rem; }
pre .cmt { color: var(--text-muted); }
pre .cmd { color: var(--green); }
pre .arg { color: var(--accent); }
a.inline { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
a.inline:hover { color: var(--accent-hover); }
table { width: 100%; border-collapse: collapse; margin: 0 0 1.5rem; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.6rem 0.9rem; border: 1px solid var(--border); }
th { background: var(--bg-tertiary); color: var(--text); font-weight: 600; }
td { color: var(--text-muted); }
td code, th code { color: var(--accent); }
.callout { background: var(--bg-secondary); border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 6px; padding: 1rem 1.25rem; margin: 0 0 1.5rem; }
.callout.warn { border-left-color: var(--orange); }
.callout.ok { border-left-color: var(--green); }
.callout p:last-child { margin-bottom: 0; }

.btn { display: inline-block; font-size: 1rem; font-weight: 600; padding: 0.75rem 1.6rem; border-radius: 8px; transition: all 0.2s; }
.btn-primary { background: var(--accent); color: #0d1117; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-row { display: flex; gap: 1rem; flex-wrap: wrap; margin: 1.5rem 0; }

footer { border-top: 1px solid var(--border); padding: 2.5rem 4vw; }
.footer-content { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer-content .brand { font-weight: 700; }
.footer-content .brand span { color: var(--accent); }
.footer-content a { color: var(--text-muted); font-weight: 500; }
.footer-content a:hover { color: var(--accent); }
@media (max-width: 768px) { .footer-content { flex-direction: column; text-align: center; } }

.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin: 2rem 0; }
.dl-card { background: var(--bg-tertiary); border: 1px solid var(--border); border-radius: 10px; padding: 1.75rem; text-align: center; transition: border-color 0.2s, transform 0.2s; }
.dl-card:hover { border-color: var(--green); transform: translateY(-2px); }
.dl-card .os { display: inline-block; font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; font-weight: 600; color: var(--green); background: rgba(63,185,80,0.1); border: 1px solid rgba(63,185,80,0.35); padding: 0.25rem 0.6rem; border-radius: 5px; margin-bottom: 0.75rem; }
.dl-card h3 { color: var(--text); margin: 0 0 0.25rem; }
.dl-card p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1.25rem; }
.dl-card .dl-btn { display: inline-block; background: var(--green); color: #0d1117; font-weight: 600; font-size: 0.92rem; padding: 0.6rem 1.4rem; border-radius: 6px; }
.dl-card .dl-btn:hover { opacity: 0.85; }
@media (max-width: 968px) { .dl-grid { grid-template-columns: 1fr; } }
.dl-note { text-align: center; color: var(--text-muted); font-size: 0.88rem; margin-top: 1.5rem; }

.docs-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; margin: 2rem 0; }
.doc-card { display: block; background: var(--bg-tertiary); border: 1px solid var(--border); border-radius: 10px; padding: 1.5rem; transition: border-color 0.2s, transform 0.2s; }
.doc-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.doc-card h3 { color: var(--text); margin: 0 0 0.4rem; }
.doc-card p { font-size: 0.9rem; color: var(--text-muted); margin: 0; }
@media (max-width: 768px) { .docs-grid { grid-template-columns: 1fr; } }