:root {
  --brand: #1f3a5f; --brand-dark: #0f2540; --brand-light: #dce5f1; --sky: #b08d57; /* --sky is the muted gold accent */
  --bg: #f4f5f7; --card: #fff; --text: #1b2430; --muted: #5a6574; --line: #dde1e8;
  --ok: #1d6b45; --warn: #8a5a00; --bad: #a32a24; --radius: 10px;
  --shadow: 0 1px 2px rgba(15,37,64,.06), 0 1px 6px rgba(15,37,64,.05);
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d131b; --card: #151d28; --text: #e6eaf0; --muted: #98a3b3; --line: #263142; --brand: #4f78ad; --brand-dark: #0b1a2e; --brand-light: #22344c; --sky: #c9a76a; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 16px/1.55 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background: var(--bg); color: var(--text); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; letter-spacing: -.005em; }
h1 { font-size: 1.4rem; } h2 { font-size: 1.15rem; } h3 { font-size: 1rem; }
a { color: var(--brand); } button, input, select, textarea { font: inherit; color: inherit; }
.boot { text-align: center; margin-top: 30vh; color: var(--muted); }

/* shell */
.top { background: var(--brand-dark); color: #fff; border-bottom: 3px solid var(--sky); position: sticky; top: 0; z-index: 5; padding-top: env(safe-area-inset-top); }
.top-in { max-width: 980px; margin: 0 auto; display: flex; align-items: center; gap: 12px; padding: 10px 16px; }
.brand { font-weight: 700; letter-spacing: .02em; color: #fff; text-decoration: none; flex: 1; }
.top nav { display: none; gap: 4px; }
.top nav a, .top .who button { color: #fff; text-decoration: none; padding: 8px 12px; border-radius: 10px; background: none; border: 0; cursor: pointer; }
.top nav a[aria-current="page"] { background: rgba(255,255,255,.2); }
.top nav a:hover, .top .who button:hover { background: rgba(255,255,255,.15); }
main { max-width: 980px; margin: 0 auto; padding: 16px 16px 96px; }
.tabbar { position: fixed; left: 0; right: 0; bottom: 0; background: var(--card); border-top: 1px solid var(--line); display: flex; padding-bottom: env(safe-area-inset-bottom); z-index: 5; }
.tabbar a { flex: 1; text-align: center; padding: 10px 4px 8px; font-size: .75rem; color: var(--muted); text-decoration: none; }
.tabbar a b { display: block; line-height: 1; }
svg.ic { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; vertical-align: middle; }
.tabbar a[aria-current="page"] { color: var(--brand); font-weight: 600; }
@media (min-width: 760px) { .top nav { display: flex; } .tabbar { display: none; } main { padding-bottom: 40px; } }

/* common */
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; margin-bottom: 12px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }
.muted { color: var(--muted); font-size: .9rem; }
.btn { background: var(--brand); color: #fff; border: 0; border-radius: 10px; padding: 10px 16px; cursor: pointer; font-weight: 600; text-decoration: none; display: inline-block; min-height: 44px; }
.btn:hover { filter: brightness(1.1); } .btn:disabled { opacity: .5; cursor: default; }
.btn.alt { background: transparent; color: var(--brand); border: 1px solid var(--brand); }
.btn.danger { background: var(--bad); }
.btn.sm { padding: 4px 10px; min-height: 32px; font-size: .85rem; }
input, select, textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); min-height: 44px; }
textarea { resize: vertical; }
label { display: block; font-size: .85rem; color: var(--muted); margin: 10px 0 4px; }
:focus-visible { outline: 3px solid var(--sky); outline-offset: 2px; }
.badge { display: inline-block; font-size: .72rem; font-weight: 600; padding: 2px 8px; border-radius: 4px; background: var(--brand-light); color: var(--brand); letter-spacing: .02em; }
@media (prefers-color-scheme: dark) { .badge { color: #cfdcf0; } }
.badge.arch { background: #e9ebef; color: #5a6574; } .badge.warn { background: #f7ecd5; color: var(--warn); } .badge.ok { background: #dcefe5; color: var(--ok); }
@media (prefers-color-scheme: dark) { .badge.arch { background: #263142; color: #9aa6b8; } .badge.warn { background: #3a2e14; color: #e3bf72; } .badge.ok { background: #153a29; color: #7fd1a3; } }
.err { color: var(--bad); margin: 8px 0 0; } .okmsg { color: var(--ok); }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { border: 1px solid var(--line); background: var(--card); border-radius: 99px; padding: 6px 12px; cursor: pointer; font-size: .9rem; min-height: 36px; }
.chip[aria-pressed="true"] { background: var(--brand); color: #fff; border-color: var(--brand); }

/* auth */
.auth { max-width: 420px; margin: 0 auto; padding: 24px 16px; }
.wordmark { text-align: center; font-size: 1.8rem; color: var(--brand); margin: 24px 0 8px; letter-spacing: .01em; }
.seg { display: flex; background: var(--line); border-radius: 12px; padding: 3px; margin-bottom: 8px; }
.seg button { flex: 1; border: 0; background: none; padding: 10px; border-radius: 10px; cursor: pointer; font-weight: 600; color: var(--muted); }
.seg button[aria-selected="true"] { background: var(--card); color: var(--brand); box-shadow: var(--shadow); }

/* home */
.hero { background: linear-gradient(135deg, #1f3a5f, #0f2540); color: #fff; border-radius: var(--radius); padding: 22px; margin-bottom: 18px; border-left: 4px solid var(--sky); }
.hero p { margin: 0 0 12px; opacity: .9; }
.hero .askbar { display: flex; gap: 8px; }
.hero .askbar input { flex: 1; border: 0; color: var(--text); background: var(--card); }
.hero .askbar input::placeholder { color: var(--muted); opacity: 1; }
.hero .btn { background: var(--sky); color: #fff; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 12px; }
.tile { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; text-decoration: none; color: inherit; border: 1px solid var(--line); border-top: 3px solid var(--brand); display: block; }
.tile:hover { border-top-color: var(--sky); } .tile b { font-size: 1.15rem; display: block; } .tile span { color: var(--muted); font-size: .85rem; }

/* library */
.doc { display: block; text-decoration: none; color: inherit; }
.doc h3 { margin-bottom: 4px; } .doc .meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.kv { display: grid; grid-template-columns: 9rem 1fr; gap: 6px 12px; margin: 12px 0; } .kv dt { color: var(--muted); } .kv dd { margin: 0; }
@media (max-width: 520px) { .kv { grid-template-columns: 1fr; } .kv dt { margin-top: 6px; } }

/* ask */
.chat { display: flex; flex-direction: column; min-height: calc(100vh - 190px); }
.thread { flex: 1; }
.msg { margin: 0 0 14px; max-width: 100%; }
.msg.user .bubble { background: var(--brand-dark); color: #fff; margin-left: auto; border-radius: 16px 16px 4px 16px; width: fit-content; max-width: 88%; padding: 10px 14px; }
.msg.bot .bubble { background: var(--card); border-radius: 16px 16px 16px 4px; box-shadow: var(--shadow); padding: 14px 16px; }
.bubble p { margin: 0 0 .6rem; } .bubble p:last-child { margin: 0; } .bubble ul { margin: 0 0 .6rem 1.1rem; padding: 0; }
.cite { display: inline-block; font-size: .72rem; font-weight: 700; background: var(--brand-light); color: var(--brand); border: 0; border-radius: 4px; padding: 0 5px; margin: 0 1px; cursor: pointer; vertical-align: super; line-height: 1.5; }
@media (prefers-color-scheme: dark) { .cite { color: #cfdcf0; } }
.src { border-top: 1px solid var(--line); margin-top: 10px; padding-top: 8px; }
.src details { margin: 6px 0; } .src summary { cursor: pointer; font-size: .9rem; }
.src blockquote { margin: 6px 0 0; padding: 8px 12px; border-left: 3px solid var(--brand-light); background: var(--bg); font-size: .85rem; white-space: pre-wrap; border-radius: 0 8px 8px 0; }
.composer { position: sticky; bottom: 62px; background: var(--bg); padding: 8px 0 4px; }
@media (min-width: 760px) { .composer { bottom: 0; } }
.composer .box { display: flex; gap: 8px; align-items: flex-end; }
.composer textarea { min-height: 48px; max-height: 160px; }
.mic { width: 48px; height: 48px; border-radius: 50%; border: 1px solid var(--brand); background: var(--card); color: var(--brand); cursor: pointer; flex: none; display: grid; place-items: center; }
.mic.live { background: var(--bad); color: #fff; border-color: var(--bad); animation: pulse 1.2s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 8px rgba(179,38,30,.2); } }
.send { height: 48px; flex: none; }
.scope { display: inline-flex; gap: 6px; align-items: center; background: var(--brand-light); color: var(--brand); padding: 4px 10px; border-radius: 99px; font-size: .85rem; }
.scope button { border: 0; background: none; cursor: pointer; font-weight: 700; color: inherit; }
.typing { color: var(--muted); }
.typing::after { content: "…"; animation: dots 1s steps(3) infinite; } @keyframes dots { 0% { content: "."; } 33% { content: ".."; } 66% { content: "..."; } }
.tools { display: flex; gap: 6px; margin-top: 10px; }
.disc { font-size: .78rem; color: var(--muted); text-align: center; margin-top: 6px; }

/* admin */
table { width: 100%; border-collapse: collapse; font-size: .9rem; } th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: .8rem; }
.scroll { overflow-x: auto; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; margin-bottom: 12px; }
.stat { background: var(--card); border-radius: var(--radius); padding: 12px; box-shadow: var(--shadow); } .stat b { font-size: 1.5rem; display: block; }
dialog { border: 0; border-radius: var(--radius); padding: 20px; width: min(560px, 94vw); background: var(--card); color: var(--text); box-shadow: 0 10px 40px rgba(0,0,0,.3); max-height: 92vh; }
dialog::backdrop { background: rgba(0,0,0,.45); }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; } @media (max-width: 480px) { .two { grid-template-columns: 1fr; } }
#toast { position: fixed; left: 50%; bottom: 80px; transform: translateX(-50%); background: var(--brand-dark); color: #fff; padding: 10px 16px; border-radius: 10px; opacity: 0; transition: opacity .2s; pointer-events: none; z-index: 20; }
#toast.show { opacity: 1; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

.bell { position: relative; color: #fff; text-decoration: none; padding: 6px 8px; display: inline-flex; }
.bell .dot { position: absolute; top: 0; right: 0; background: #c0392b; color: #fff; font-size: .65rem; font-weight: 700; min-width: 16px; height: 16px; line-height: 16px; text-align: center; border-radius: 8px; padding: 0 3px; }
.tabbar a b { position: relative; display: block; width: 22px; margin: 0 auto 3px; }
.tabbar a b[data-n]:not([data-n=""])::after { content: attr(data-n); position: absolute; top: -2px; right: -12px; background: #c0392b; color: #fff; font-size: .6rem; min-width: 14px; line-height: 14px; border-radius: 7px; }

h2.topic { margin: 22px 0 8px; font-size: 1.1rem; display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap; border-bottom: 2px solid var(--line); padding-bottom: 6px; }
h2.topic .rev { margin-left: auto; font-weight: 400; font-size: .85rem; }
.ref { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: .8rem; }
.doc h3 { font-size: 1rem; font-weight: 600; }

details.tgroup { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 8px; box-shadow: var(--shadow); }
details.tgroup > summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 10px; padding: 14px 16px; min-height: 52px; }
details.tgroup > summary::-webkit-details-marker { display: none; }
details.tgroup > summary::before { content: ""; width: 8px; height: 8px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(-45deg); transition: transform .15s; flex: none; margin-right: 2px; }
details.tgroup[open] > summary::before { transform: rotate(45deg); }
details.tgroup > summary:hover { background: var(--bg); border-radius: var(--radius); }
.tname { font-weight: 600; flex: 1; min-width: 0; }
.cnt { font-size: .85rem; background: var(--bg); border-radius: 99px; padding: 0 9px; }
.tgroup .rev { font-size: .85rem; white-space: nowrap; }
.tbody { padding: 0 12px 8px; border-top: 1px solid var(--line); }
.tbody .card { box-shadow: none; border: 1px solid var(--line); margin: 8px 0; }
h3.sub { margin: 16px 4px 4px; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
@media (max-width: 520px) { .tgroup .rev { display: none; } }

.result .snippet { margin: 8px 0; font-size: .92rem; color: var(--text); line-height: 1.5; }
mark { background: #f6e3a1; color: inherit; border-radius: 2px; padding: 0 1px; }
@media (prefers-color-scheme: dark) { mark { background: #6b5a1e; } }
.result-actions { margin-top: 6px; gap: 8px; }
.result h3 a { color: var(--text); text-decoration: none; } .result h3 a:hover { color: var(--brand); text-decoration: underline; }
.result .meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }