/*
 * The brand as a style layer over the pages' structure: "Quiet Instrument" (release's `frontend/DESIGN.md`, `docs/BRAND.md`, decision D98).
 * Warm paper and ink, hairline borders, one blue for links, and amber only where work is under way, where focus is, and on credit spent.
 * The display serif and the mono are named first and fall back to what the system has: no font file is served.
 */
:root {
  color-scheme: light dark;
  --background: hsl(42 25% 97.8%); --foreground: hsl(40 12% 12%); --sidebar: hsl(42 18% 95.5%); --card: hsl(42 20% 96.5%);
  --hover: hsl(42 14% 92%); --muted: hsl(42 14% 91%); --muted-foreground: hsl(40 8% 40%); --border: hsl(40 12% 87%);
  --accent: hsl(36 90% 40%); --link: hsl(212 60% 42%); --ok: hsl(150 40% 30%); --destructive: hsl(4 62% 44%); --caution: hsl(30 55% 34%);
  --ink: var(--foreground); --quiet: var(--muted-foreground); --line: var(--border); --wash: var(--muted); --bad: var(--destructive); --warn: var(--caution); --good: var(--ok);
  --font-display: "IBM Plex Serif", "Songti SC", "Noto Serif CJK SC", Georgia, serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font: 15px/1.6 var(--font-body); color: var(--foreground); background: var(--background);
}
@media (prefers-color-scheme: dark) {
  :root {
    --background: hsl(40 9% 4.3%); --foreground: hsl(40 20% 95%); --sidebar: hsl(40 8% 5.6%); --card: hsl(40 8% 7%);
    --hover: hsl(40 7% 11%); --muted: hsl(40 7% 14.5%); --muted-foreground: hsl(40 7% 63%); --border: hsl(40 7% 14%);
    --accent: hsl(38 92% 52%); --link: hsl(210 55% 62%); --ok: hsl(150 35% 44%); --destructive: hsl(4 65% 54%); --caution: hsl(34 60% 58%);
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { display: flex; flex-direction: column; }
a { color: var(--link); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button, select, input, textarea { font: inherit; color: inherit; }
button { padding: 0.35rem 0.8rem; border: 1px solid var(--line); border-radius: 8px; background: var(--card); cursor: pointer; }
button:hover:not(:disabled) { background: var(--hover); }
button.primary, button.primary:hover:not(:disabled) { background: var(--foreground); border-color: var(--foreground); color: var(--background); }
button:disabled { opacity: 0.45; cursor: default; }
select, input { padding: 0.3rem 0.5rem; border: 1px solid var(--line); border-radius: 8px; background: var(--card); }
h1 { font-family: var(--font-display); font-weight: 600; }
pre, code { font: 0.85rem/1.5 var(--font-mono); }
pre { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.quiet { color: var(--quiet); font-size: 0.875rem; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.75rem; margin: 0; }

.preview-bar { flex: none; padding: 0.5rem 1rem; border-bottom: 2px solid #111; font-size: 0.8125rem; color: #111; background: repeating-linear-gradient(135deg, #ffe08a, #ffe08a 14px, #ffd25e 14px, #ffd25e 28px); }
.preview-bar strong { display: block; }
.preview-bar .row { margin-top: 0.35rem; }
.preview-bar button, .preview-bar select { padding: 0.1rem 0.5rem; font-size: 0.8125rem; }
.preview-bar .quiet { color: #333; font-size: 0.8125rem; }
.preview-note { font-weight: 600; }

.app { flex: 1; min-height: 0; display: flex; position: relative; }
.page { flex: 1; min-width: 0; min-height: 0; display: flex; flex-direction: column; position: relative; }
.sidebar { display: none; flex: none; width: 15.5rem; min-height: 0; flex-direction: column; gap: 0.9rem; padding: 0.7rem 0.6rem; border-right: 1px solid var(--line); background: var(--sidebar); font-size: 0.9rem; }
.app.sidebar-shown .sidebar { display: flex; }
.backdrop { display: none; }
.sidebar-open { position: absolute; z-index: 2; top: 0.5rem; left: 0.5rem; padding: 0.2rem 0.55rem; line-height: 1.3; }
.app.sidebar-shown .sidebar-open, .app.bare .sidebar-open { display: none; }
.sidebar-head { display: flex; align-items: center; justify-content: space-between; padding: 0 0.4rem; }
.sidebar .brand { display: flex; align-items: center; gap: 0.5rem; font: 600 1.05rem var(--font-display); color: inherit; text-decoration: none; }
.sidebar .brand::before { content: ""; width: 1.4rem; height: 1.4rem; background: url("./assets/favicon.svg") center / contain no-repeat; }
.sidebar-close { padding: 0 0.55rem; line-height: 1.5; background: none; }
.sidebar a { color: inherit; text-decoration: none; }
.sidebar .entry, .sidebar .money { display: flex; flex-direction: column; gap: 0.1rem; padding: 0.4rem; border-radius: 6px; }
.sidebar .entry:hover, .sidebar .money:hover, .contents button:hover { background: var(--hover); }
.sidebar .entry-name { font-weight: 600; }
.contents { flex: 1; min-height: 0; overflow-y: auto; }
.contents h2 { margin: 0; padding: 0 0.4rem; font-size: 0.9rem; }
.contents h3 { margin: 0.5rem 0 0.1rem; padding: 0 0.4rem; font-size: 0.75rem; font-weight: 400; color: var(--quiet); }
.contents ul { margin: 0; padding: 0; list-style: none; }
.contents button { display: block; width: 100%; padding: 0.3rem 0.4rem; border: none; background: none; text-align: left; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.entries { flex: none; }
.glance, .box { display: flex; align-items: center; gap: 0.4rem; margin: 0; font-size: 0.8125rem; }
.dot { flex: none; width: 0.5rem; height: 0.5rem; border-radius: 50%; border: 1px solid var(--quiet); }
.on > .dot { border-color: var(--good); background: var(--good); }
.box { padding: 0.1rem 0.4rem 0.3rem; }
.box:not(.on) > .dot { border-color: var(--warn); background: var(--warn); }
.sidebar-foot { flex: none; display: flex; flex-direction: column; padding-top: 0.6rem; border-top: 1px solid var(--line); }
.sidebar .money .figure { font-size: 1.15rem; font-family: var(--font-mono); }
.sidebar .money.warned .figure { color: var(--warn); }
.sidebar .money.failed .figure { color: var(--bad); }
.bar { display: block; height: 0.3rem; margin: 0.25rem 0 0.1rem; border-radius: 999px; background: var(--muted); overflow: hidden; }
.bar > span { display: block; height: 100%; border-radius: 999px; background: var(--quiet); }
/* Credit spent is the one bar drawn in amber. */
.money .bar > span, .credit .bar > span { background: var(--accent); }
.warned .bar > span { background: var(--warn); }
.failed .bar > span { background: var(--bad); }
@media not (min-width: 56rem) {
  .sidebar { position: absolute; z-index: 4; top: 0; bottom: 0; left: 0; width: min(18rem, 86vw); box-shadow: 0 0 1.5rem rgb(0 0 0 / 0.2); }
  .app.sidebar-shown .backdrop { display: block; position: absolute; z-index: 3; inset: 0; background: rgb(0 0 0 / 0.3); }
}

main { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.scroller { flex: 1; min-height: 0; overflow-y: auto; }
.stream, .settings { width: 100%; max-width: 46rem; margin: 0 auto; padding: 0 1rem; }
.bottom > * { width: calc(100% - 2rem); max-width: 44rem; margin: 0 auto; }
.stream { padding-top: 2.6rem; padding-bottom: 1rem; }
.item { margin: 0 0 1.1rem; }
.item.assistant:has(> .tool:last-child):has(+ .item.assistant) { margin-bottom: 0.35rem; }
.item.user { width: fit-content; max-width: 75%; margin-left: auto; padding: 0.55rem 0.9rem; border-radius: 14px; background: var(--muted); }
.item.revealed { outline: 2px solid var(--link); outline-offset: 3px; }
.item.user .plain { white-space: pre-wrap; overflow-wrap: anywhere; }
.item.user.pending { opacity: 0.7; }
.item.user p { margin: 0.2rem 0 0; }
.item.record { color: var(--quiet); font-size: 0.8125rem; }
.item.record pre { margin-top: 0.4rem; }
.markdown > :first-child { margin-top: 0; }
.markdown > :last-child { margin-bottom: 0; }
.markdown { overflow-wrap: anywhere; margin-bottom: 0.6rem; }
.markdown h1 { font-size: 1.3rem; }
.markdown h2 { font-size: 1.15rem; }
.markdown h3, .markdown h4 { font-size: 1rem; }
.markdown h1, .markdown h2, .markdown h3, .markdown h4 { margin: 1rem 0 0.4rem; line-height: 1.3; }
.markdown table { border-collapse: collapse; display: block; overflow-x: auto; }
.markdown th, .markdown td { padding: 0.25rem 0.6rem; border: 1px solid var(--line); text-align: left; }
.markdown th { background: var(--wash); }
.markdown pre { padding: 0.6rem 0.8rem; border-radius: 6px; background: var(--wash); }
.markdown code { padding: 0.05rem 0.25rem; border-radius: 4px; background: var(--wash); }
.markdown pre code { padding: 0; background: none; }
.markdown blockquote { margin: 0.6rem 0; padding-left: 0.8rem; border-left: 3px solid var(--line); color: var(--quiet); }
a.file { text-decoration-style: dotted; }
a.file::after { content: " ↓"; font-size: 0.8em; }

.thinking { margin-bottom: 0.6rem; color: var(--quiet); font-size: 0.9rem; }
.thinking summary { cursor: pointer; font-style: italic; }
.thinking .markdown { margin-top: 0.3rem; padding-left: 0.8rem; border-left: 2px solid var(--line); }
.tool { margin-bottom: 0.35rem; border: 1px solid var(--line); border-radius: 8px; font-size: 0.875rem; }
.tool summary { display: flex; align-items: baseline; gap: 0.55rem; padding: 0.3rem 0.65rem; cursor: pointer; list-style: none; }
.tool summary::-webkit-details-marker { display: none; }
.tool summary::before { content: "›"; flex: none; color: var(--quiet); }
.tool[open] summary::before { content: "⌄"; }
.tool .name { flex: none; font: 600 0.8125rem var(--font-mono); }
.tool .argument { flex: 1; min-width: 0; color: var(--quiet); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tool .state { padding: 0; border: none; border-radius: 0; flex: none; display: flex; align-items: center; gap: 0.35rem; font-size: 0.75rem; color: var(--quiet); }
.tool.failed { border-color: var(--bad); }
.tool.failed .state { color: var(--bad); font-weight: 600; }
.tool .part { padding: 0.4rem 0.65rem; border-top: 1px solid var(--line); background: var(--wash); }
.tool .part.returned { background: none; }
.fold { margin-top: 0.3rem; padding: 0; border: none; background: none; color: var(--link); font-size: 0.8125rem; text-decoration: underline; }
.marker { margin: 0.4rem 0 0; font-size: 0.875rem; }
.marker p { margin: 0 0 0.3rem; font-weight: 600; }
.marker.cancelled { color: var(--quiet); font-weight: 600; }
.marker.cancelled .quiet { font-weight: 400; }
.marker.failed { padding: 0.5rem 0.7rem; border: 1px solid var(--bad); border-radius: 8px; color: var(--bad); }
.marker.failed .output { color: var(--ink); }
.marker.warned { color: var(--warn); }
.working { display: flex; align-items: center; gap: 0.5rem; margin: 0; color: var(--quiet); font-size: 0.875rem; }
.pulse { width: 0.55rem; height: 0.55rem; border-radius: 50%; background: var(--accent); animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 0.25; } 50% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .pulse { animation: none; } }

.bottom { flex: none; padding: 0.3rem 0 0.9rem; background: var(--background); }
.status { min-height: 1.3rem; margin: 0 auto 0.3rem !important; color: var(--quiet); font-size: 0.8125rem; }
.status.held { color: var(--bad); }
.status.warned { color: var(--warn); }
.composer { display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 14px; background: var(--card); padding: 0.4rem 0.5rem 0.45rem 0.8rem !important; box-shadow: 0 1px 4px rgb(0 0 0 / 0.06); }
.composer:focus-within { border-color: var(--quiet); }
.composer textarea { min-height: 2.8rem; max-height: 40vh; padding: 0.3rem 0; border: none; outline: none; resize: none; background: none; field-sizing: content; }
.composer-row { display: flex; align-items: center; justify-content: space-between; gap: 0.6rem; }
.composer .model { min-width: 0; font-size: 0.8125rem; color: var(--quiet); }
.composer .model select { max-width: 100%; padding: 0.15rem 0.3rem; border-color: transparent; color: var(--quiet); }
.composer .model select:hover { border-color: var(--line); }
.composer button { border-radius: 999px; }
.signed-out { margin: 3rem auto; text-align: center; }

.settings { padding-top: 2.6rem; padding-bottom: 3rem; overflow-y: auto; max-width: 46rem; }
main:has(> .settings) { overflow-y: auto; }
.settings .back { margin: 0 0 0.6rem; font-size: 0.875rem; }
.credit { max-width: 22rem; }
.where { margin-top: 1rem; }
.where table { width: 100%; max-width: 30rem; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.where th { padding: 0.2rem 1rem 0.2rem 0; font-weight: 400; text-align: left; white-space: nowrap; }
.where .amount { padding-right: 1rem; text-align: right; white-space: nowrap; }
.where .share { width: 60%; }
.settings h1 { margin: 0 0 1rem; font-size: 1.9rem; }
.settings h2 { margin: 0 0 0.3rem; font-size: 1.05rem; }
.settings h3 { margin: 1.1rem 0 0.2rem; font-size: 0.95rem; }
.settings section { margin-bottom: 1.2rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.settings p { margin: 0.3rem 0; }
.figure, .where .amount, .rates td { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.figure { font-size: 1.25rem; }
.terms { margin: 0.2rem 0; padding-left: 1.1rem; }
.source button { margin-top: 0.4rem; }
.state { display: inline-flex; align-items: center; gap: 0.35rem; flex: none; padding: 0.05rem 0.55rem; border: 1px solid var(--line); border-radius: 999px; font-size: 0.75rem; color: var(--quiet); white-space: nowrap; }
.state.on { border-color: color-mix(in srgb, var(--good) 35%, var(--background)); background: color-mix(in srgb, var(--good) 7%, var(--background)); color: var(--good); font-weight: 600; }
.tile { flex: none; display: grid; place-items: center; width: 1.9rem; height: 1.9rem; border-radius: 7px; background: var(--wash); border: 1px solid var(--line); font-size: 0.9rem; font-weight: 600; color: var(--quiet); }
.page-head { justify-content: space-between; margin-bottom: 0.4rem; }
.page-head h1 { margin: 0; }
a.button { padding: 0.35rem 0.8rem; border: 1px solid var(--line); border-radius: 6px; color: inherit; font-size: 0.875rem; text-decoration: none; }
a.button:hover, a.button:focus-visible { border-color: var(--quiet); }
.count { margin-left: 0.45rem; font-size: 0.8125rem; font-weight: 400; color: var(--quiet); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr)); gap: 0.7rem; margin-top: 0.7rem; }
.card { display: flex; flex-direction: column; gap: 0.45rem; min-height: 8.2rem; padding: 0.8rem 0.9rem; border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: inherit; text-decoration: none; transition: border-color 0.12s, box-shadow 0.12s; }
.card:hover, .card:focus-visible { border-color: var(--quiet); box-shadow: 0 1px 4px rgb(0 0 0 / 0.06); }
.card.disabled, .card.missing { background: var(--wash); }
.card.disabled .about, .card.missing .about { color: var(--quiet); }
.card.missing { border-style: dashed; }
.card.missing .tile { background: var(--background); }
.card .row { flex-wrap: nowrap; gap: 0.55rem; }
.card .row { align-items: flex-start; }
.card .row strong { flex: 1; min-width: 0; padding-top: 0.15rem; overflow-wrap: anywhere; line-height: 1.3; }
.card .about { font-size: 0.9rem; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card .quiet { margin-top: auto; padding-top: 0.45rem; border-top: 1px solid var(--line); font-size: 0.8125rem; }
.plugin-head { gap: 0.6rem; }
.plugin-head h1 { margin: 0; }
.plugins section { margin-top: 1.1rem; }
.plugin-head .state { margin-left: auto; }
.ways { display: flex; flex-direction: column; margin-top: 0.6rem; border: 1px solid var(--line); border-radius: 10px; }
.way { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem 0.9rem; color: inherit; text-decoration: none; }
.way + .way { border-top: 1px solid var(--line); }
.way:hover, .way:focus-visible { background: var(--wash); }
.way > span:first-child { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.seek { width: 100%; margin-top: 0.8rem; padding: 0.45rem 0.7rem; }
.providers { margin: 0.6rem 0 0.8rem; padding: 0; list-style: none; border: 1px solid var(--line); border-radius: 10px; }
.providers li { padding: 0.55rem 0.9rem; }
.providers li + li { border-top: 1px solid var(--line); }
.providers .row { flex-wrap: nowrap; }
.provider-name { flex: 1; min-width: 0; display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 0.5rem; }
.providers button { flex: none; font-size: 0.8125rem; padding: 0.25rem 0.65rem; }
.providers .key-entry { margin-top: 0.5rem; }
.served { margin: 0.35rem 0 0.1rem; }
.served .row { margin-top: 0.4rem; }
.served-list { margin: 0.4rem 0 0.2rem; padding: 0.3rem 0.6rem; max-height: 15rem; overflow-y: auto; list-style: none; border: 1px solid var(--line); border-radius: 8px; background: var(--wash); columns: 2 14rem; column-gap: 1.2rem; }
.providers .served-list li { padding: 0.15rem 0; border: none; break-inside: avoid; }
.served-list label { display: flex; align-items: baseline; gap: 0.45rem; font-size: 0.875rem; cursor: pointer; }
.served-list .quiet { font-size: 0.75rem; overflow-wrap: anywhere; }
@media (max-width: 30rem) { .providers .row { flex-wrap: wrap; } .provider-name { flex-basis: 100%; } }
.rates { border-collapse: collapse; margin-top: 0.3rem; }
.rates th { text-align: left; font-weight: 600; padding: 0.15rem 1rem 0.15rem 0; }
.rates td { padding: 0.15rem 1rem 0.15rem 0; color: var(--quiet); }
.key-entry input { flex: 1 1 12rem; min-width: 0; }
dialog.confirm { max-width: 30rem; padding: 1.2rem 1.4rem; border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: var(--foreground); }
dialog.confirm::backdrop { background: rgb(0 0 0 / 0.35); }
dialog.confirm h2 { margin-top: 0; }