:root {
  --bg: #f7f7f8;
  --surface: #ffffff;
  --surface-2: #f0f0f3;
  --border: #e2e2e7;
  --text: #1c1d21;
  --muted: #6b6e78;
  --accent: #208a55;
  --accent-soft: #e3f4ea;
  --danger: #c62a2f;
  --danger-soft: #fdecec;
  --warn: #a35200;
  --warn-soft: #fff1de;
  --code-bg: #f2f3f5;
  --code-text: #1c1d21;
  --mark: #fff3a3;
  --shadow: 0 1px 2px rgb(0 0 0 / 6%), 0 2px 8px rgb(0 0 0 / 4%);
  --radius: 12px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115; --surface: #171a20; --surface-2: #1f232b; --border: #2a2f39;
    --text: #e8e8ea; --muted: #9a9ea8; --accent: #3dd68c; --accent-soft: #15301f;
    --danger: #ff6369; --danger-soft: #3b1618; --warn: #ffb35c; --warn-soft: #3a2710;
    --code-bg: #0b0d11; --code-text: #e8e8ea; --mark: #5a4c00;
    --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1115; --surface: #171a20; --surface-2: #1f232b; --border: #2a2f39;
  --text: #e8e8ea; --muted: #9a9ea8; --accent: #3dd68c; --accent-soft: #15301f;
  --danger: #ff6369; --danger-soft: #3b1618; --warn: #ffb35c; --warn-soft: #3a2710;
  --code-bg: #0b0d11; --code-text: #e8e8ea; --mark: #5a4c00;
  --shadow: none; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.55 var(--sans);
  padding-bottom: calc(64px + env(safe-area-inset-bottom));
  overflow-wrap: anywhere;
}
a { color: var(--accent); }
button { font: inherit; color: inherit; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 8px;
  padding: calc(8px + env(safe-area-inset-top)) 12px 8px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; text-decoration: none; color: var(--text); white-space: nowrap; }
.icon-btn {
  display: grid; place-items: center; width: 40px; height: 40px; flex: none;
  border: 0; background: none; border-radius: 10px; color: var(--text); cursor: pointer;
}
.icon-btn:active { background: var(--surface-2); }
.search {
  flex: 1; display: flex; align-items: center; gap: 8px; min-width: 0;
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 0 12px;
  color: var(--muted);
}
.search:focus-within { border-color: var(--accent); }
.search input {
  flex: 1; min-width: 0; border: 0; outline: 0; background: none; color: var(--text);
  font-size: 16px; padding: 9px 0;
}
@media (max-width: 420px) { .brand { display: none; } }

/* ---------- layout ---------- */
main { max-width: 860px; margin: 0 auto; padding: 16px; outline: none; }
.loading, .empty { color: var(--muted); text-align: center; padding: 40px 0; }
h1 { font-size: 1.6rem; line-height: 1.25; margin: 4px 0 4px; }
.lead { color: var(--muted); margin: 0 0 16px; }
.section-title {
  font-size: .8rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: var(--muted); margin: 24px 0 8px;
}

/* ---------- tab bar ---------- */
.tabbar {
  position: fixed; inset: auto 0 0 0; z-index: 10;
  display: flex; justify-content: space-around;
  background: var(--surface); border-top: 1px solid var(--border);
  padding: 6px 0 calc(6px + env(safe-area-inset-bottom));
}
.tabbar a {
  display: flex; flex-direction: column; align-items: center; gap: 1px;
  font-size: .72rem; text-decoration: none; color: var(--muted); padding: 2px 20px;
}
.tabbar a span { font-size: 1.15rem; line-height: 1.2; }
.tabbar a.active { color: var(--accent); font-weight: 600; }

/* ---------- category grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.cat {
  display: flex; flex-direction: column; gap: 4px; padding: 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  text-decoration: none; color: var(--text); box-shadow: var(--shadow);
  border-top: 3px solid var(--cat, var(--accent));
}
.cat:active { transform: scale(.98); }
.cat .ico { font-size: 1.5rem; }
.cat b { font-size: 1rem; }
.cat small { color: var(--muted); font-size: .78rem; line-height: 1.35; }

/* ---------- lists ---------- */
.list { display: flex; flex-direction: column; gap: 8px; }
.row {
  display: block; padding: 12px 14px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
  text-decoration: none; color: var(--text); box-shadow: var(--shadow);
}
.row b { display: block; }
.row small { display: block; color: var(--muted); font-size: .85rem; margin-top: 2px; }
.row .crumb { color: var(--muted); font-size: .75rem; margin-bottom: 2px; }
.row mark, .card mark { background: var(--mark); color: inherit; border-radius: 3px; padding: 0 1px; }

/* ---------- chips ---------- */
.chips { display: flex; gap: 6px; overflow-x: auto; padding: 2px 0 10px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: none; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: 999px; padding: 5px 12px; font-size: .85rem; cursor: pointer; white-space: nowrap;
}
.chip.on { background: var(--accent); border-color: var(--accent); color: #fff; }
:root[data-theme="dark"] .chip.on { color: #0f1115; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .chip.on { color: #0f1115; } }

/* ---------- command cards ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 10px 12px; box-shadow: var(--shadow);
}
.card.danger { border-left: 4px solid var(--danger); }
.card .cmdline { display: flex; align-items: flex-start; gap: 8px; }
.card code.cmd {
  flex: 1; font-family: var(--mono); font-size: .9rem; background: var(--code-bg); color: var(--code-text);
  padding: 7px 9px; border-radius: 8px; white-space: pre-wrap; word-break: break-word;
}
.card .desc { margin: 6px 2px 0; font-size: .92rem; }
.card .note { margin: 4px 2px 0; font-size: .82rem; color: var(--muted); }
.card .meta { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; align-items: center; }
.badge {
  font-size: .7rem; font-weight: 600; padding: 2px 7px; border-radius: 999px;
  background: var(--surface-2); color: var(--muted); text-decoration: none;
}
.badge.admin { background: var(--warn-soft); color: var(--warn); }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.mini-btn {
  flex: none; border: 1px solid var(--border); background: var(--surface-2); border-radius: 8px;
  padding: 6px 9px; font-size: .78rem; cursor: pointer; min-width: 52px;
}
.mini-btn:active, .mini-btn.done { background: var(--accent); color: #fff; border-color: var(--accent); }
.star { border: 0; background: none; font-size: 1.15rem; line-height: 1; cursor: pointer; color: var(--muted); padding: 4px; }
.star.on { color: #f5a524; }
.group-title { font-weight: 700; margin: 18px 0 8px; font-size: 1rem; }

/* ---------- article ---------- */
.article-head { display: flex; align-items: flex-start; gap: 8px; }
.article-head h1 { flex: 1; }
.crumbs { font-size: .8rem; color: var(--muted); margin-bottom: 2px; }
.crumbs a { color: var(--muted); }
details.toc {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 8px 14px; margin: 12px 0 8px;
}
details.toc summary { cursor: pointer; font-weight: 600; }
details.toc ol { margin: 6px 0 4px; padding-left: 18px; }
details.toc li { margin: 3px 0; }
details.toc li.d3 { margin-left: 14px; font-size: .9rem; list-style: circle; }
.prose h2 { font-size: 1.3rem; margin: 30px 0 8px; padding-top: 10px; border-top: 1px solid var(--border); scroll-margin-top: 70px; }
.prose h3 { font-size: 1.08rem; margin: 22px 0 6px; scroll-margin-top: 70px; }
.prose h4 { margin: 16px 0 4px; }
.prose p, .prose li { font-size: .97rem; }
.prose blockquote { margin: 12px 0; padding: 8px 14px; border-left: 3px solid var(--accent); background: var(--surface); border-radius: 0 8px 8px 0; color: var(--muted); }
.prose blockquote p { margin: 4px 0; }
.prose :not(pre) > code {
  font-family: var(--mono); font-size: .86em; background: var(--code-bg); color: var(--code-text);
  padding: 1px 5px; border-radius: 5px;
}
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 20px 0; }
.code { position: relative; margin: 10px 0; }
.code pre {
  margin: 0; background: var(--code-bg); color: var(--code-text); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px; overflow-x: auto; font: .82rem/1.5 var(--mono);
}
.code .copy {
  position: absolute; top: 6px; right: 6px; border: 1px solid var(--border); background: var(--surface);
  border-radius: 7px; padding: 3px 8px; font-size: .72rem; cursor: pointer; opacity: .9;
}
.code .copy.done { background: var(--accent); color: #fff; border-color: var(--accent); }
.table-wrap { overflow-x: auto; margin: 10px 0; border: 1px solid var(--border); border-radius: 10px; }
.prose table { border-collapse: collapse; width: 100%; font-size: .87rem; background: var(--surface); }
.prose th, .prose td { padding: 7px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.prose th { background: var(--surface-2); font-weight: 600; white-space: nowrap; }
.prose tr:last-child td { border-bottom: 0; }
.prose td code { white-space: nowrap; }
.flash { animation: flash 1.6s ease-out; }
@keyframes flash { from { background: var(--mark); } to { background: transparent; } }

/* ---------- tools ---------- */
.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; box-shadow: var(--shadow); margin-bottom: 12px;
}
.field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 10px; }
.field label { font-size: .8rem; color: var(--muted); font-weight: 600; }
.field input, .field select {
  font: 1rem var(--mono); padding: 10px 12px; border-radius: 10px; color: var(--text);
  border: 1px solid var(--border); background: var(--bg);
}
.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; font-size: .9rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-family: var(--mono); }
.bin { font-family: var(--mono); font-size: .78rem; word-break: break-all; }
.bin .n { color: var(--accent); font-weight: 700; }
.err { color: var(--danger); font-size: .9rem; }

/* ---------- toast ---------- */
#toast {
  position: fixed; left: 50%; bottom: calc(76px + env(safe-area-inset-bottom)); transform: translate(-50%, 20px);
  background: var(--text); color: var(--bg); padding: 8px 16px; border-radius: 999px; font-size: .85rem;
  opacity: 0; pointer-events: none; transition: .2s; z-index: 20;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }

.settings-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.settings-row:last-child { border-bottom: 0; }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.seg button { border: 0; background: var(--surface); padding: 6px 12px; cursor: pointer; font-size: .85rem; }
.seg button.on { background: var(--accent); color: #fff; }
.btn { border: 1px solid var(--border); background: var(--surface-2); border-radius: 10px; padding: 8px 14px; cursor: pointer; }