:root {
  --bg: #f6f4ef; --panel: #ffffff; --ink: #1d2126; --muted: #5d6673; --line: #e2ded5;
  --accent: #0e3b5e; --accent-ink: #ffffff; --warn: #9a3412; --warn-bg: #fff4ec; --hot: #7f1d1d; --hot-bg: #fde8e8;
  --soon-bg: #fff8dc; --code: #f0ede6;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
:root:not([data-theme="light"]) { color-scheme: light dark; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15181c; --panel: #1e2328; --ink: #e8e6e1; --muted: #9aa3ad; --line: #30363d;
    --accent: #7fb3d5; --accent-ink: #0b1a26; --warn: #f6ad77; --warn-bg: #2b2018; --hot: #f8a5a5; --hot-bg: #2d1a1a;
    --soon-bg: #2a2614; --code: #262b31;
  }
}
:root[data-theme="dark"] {
  --bg: #15181c; --panel: #1e2328; --ink: #e8e6e1; --muted: #9aa3ad; --line: #30363d;
  --accent: #7fb3d5; --accent-ink: #0b1a26; --warn: #f6ad77; --warn-bg: #2b2018; --hot: #f8a5a5; --hot-bg: #2d1a1a;
  --soon-bg: #2a2614; --code: #262b31;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 var(--sans); }
a { color: var(--accent); }
b, strong { font-weight: 650; }

/* top bar */
.topbar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 16px; padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { text-decoration: none; color: var(--ink); font-weight: 700; white-space: nowrap; }
.brand small { color: var(--muted); font-weight: 400; margin-left: 6px; }
.topnav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; flex: 1; }
.topnav::-webkit-scrollbar { display: none; }
.topnav a { white-space: nowrap; padding: 6px 10px; border-radius: 8px; text-decoration: none; color: var(--muted); font-size: 14px; }
.topnav a.active, .topnav a:hover { background: var(--bg); color: var(--ink); }
.logout { font-size: 13px; color: var(--muted); text-decoration: none; white-space: nowrap; }

/* layout */
.shell { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 24px; max-width: 1240px; margin: 0 auto; padding: 24px 16px 64px; }
.shell-solo { grid-template-columns: minmax(0, 1fr); max-width: 900px; }
.sidenav { position: sticky; top: 64px; align-self: start; max-height: calc(100vh - 80px); overflow: auto; font-size: 14px; }
.nav-group { margin: 14px 0 6px; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.nav-link { display: block; padding: 5px 8px; border-radius: 6px; color: var(--ink); text-decoration: none; }
.nav-link:hover, .nav-link.is-here { background: var(--panel); }
.nav-link.lvl3 { padding-left: 20px; color: var(--muted); }
.nav-back { display: block; margin-bottom: 8px; font-weight: 600; text-decoration: none; }
@media (max-width: 900px) { .shell { grid-template-columns: minmax(0, 1fr); } .sidenav { position: static; max-height: none; } }

/* hero & cards */
.hero { padding: 8px 0 20px; }
.hero.small { padding-bottom: 8px; }
.eyebrow { margin: 0 0 6px; font-size: 13px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.hero h1 { margin: 0 0 10px; font-size: clamp(26px, 4vw, 38px); line-height: 1.15; letter-spacing: -.01em; }
.lede { margin: 0; font-size: 17px; color: var(--muted); max-width: 70ch; }
.sec-head { margin: 28px 0 10px; font-size: 20px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.facts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.fact { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; display: flex; flex-direction: column; gap: 4px; }
.fact b { font-size: 22px; letter-spacing: -.01em; }
.fact span { font-size: 13px; color: var(--muted); }
.fact.warn { border-color: var(--warn); background: var(--warn-bg); }
.sec-grid, .doc-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.sec-card, .doc-card { display: flex; flex-direction: column; gap: 6px; padding: 16px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; text-decoration: none; color: var(--ink); }
.sec-card:hover, .doc-card:hover { border-color: var(--accent); }
.sec-card span:last-child, .doc-card span { font-size: 14px; color: var(--muted); }
.sec-emoji { font-size: 24px; }
.btn { display: inline-block; padding: 6px 12px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); text-decoration: none; font-size: 13px; white-space: nowrap; }
.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 16px; font-size: 14px; }

/* tables */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { font-size: 12px; letter-spacing: .05em; text-transform: uppercase; color: var(--muted); }
tr.soon td { background: var(--soon-bg); }
tr.hot td { background: var(--hot-bg); color: var(--hot); }
.markdown table { display: block; overflow-x: auto; }

/* markdown */
.markdown { font-size: 16px; }
.markdown h1 { font-size: 26px; margin: 0 0 14px; line-height: 1.2; }
.markdown h2 { font-size: 20px; margin: 28px 0 10px; padding-top: 8px; border-top: 1px solid var(--line); }
.markdown h3 { font-size: 17px; margin: 20px 0 8px; }
.markdown p, .markdown ul, .markdown ol { margin: 0 0 12px; }
.markdown li { margin: 4px 0; }
.markdown blockquote { margin: 12px 0; padding: 8px 14px; border-left: 3px solid var(--accent); background: var(--bg); color: var(--ink); border-radius: 0 8px 8px 0; }
.markdown code { background: var(--code); padding: 1px 5px; border-radius: 4px; font-size: 90%; }
.markdown pre { background: var(--code); padding: 12px; border-radius: 8px; overflow-x: auto; }
.markdown hr { border: 0; border-top: 1px solid var(--line); margin: 20px 0; }
.markdown img { max-width: 100%; }

/* footer */
.foot { max-width: 1240px; margin: 0 auto; padding: 0 16px 32px; font-size: 12px; color: var(--muted); }

/* login */
.login-body { display: grid; place-items: center; min-height: 100vh; margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 var(--sans); }
.login-card { width: min(92vw, 380px); background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 28px; text-align: center; }
.login-emoji { font-size: 40px; }
.login-card h1 { margin: 6px 0 4px; font-size: 24px; }
.login-sub { margin: 0 0 16px; color: var(--muted); font-size: 14px; }
.login-err { color: var(--hot); font-size: 14px; }
.login-card input { width: 100%; padding: 12px; margin-bottom: 10px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--ink); font-size: 16px; }
.login-card button { width: 100%; padding: 12px; border: 0; border-radius: 10px; background: var(--accent); color: var(--accent-ink); font-size: 16px; font-weight: 600; cursor: pointer; }