/* Librarian web UI. Colors are tokens; the dark theme only redefines them. */
:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --surface-2: #f0eee8;
  --border: #e4e1d8;
  --border-strong: #d2cec2;
  --text: #1b1d20;
  --muted: #5f636a;
  --faint: #8c9097;
  --accent: #0b6e69;
  --accent-hover: #095854;
  --accent-ink: #ffffff;
  --accent-soft: #e0efec;
  --accent-line: #93cbc3;
  --warn: #92400e;
  --warn-soft: #fdf1dc;
  --danger: #b42318;
  --danger-soft: #fcebe9;
  --shadow: 0 1px 2px rgb(28 25 20 / 4%), 0 6px 24px rgb(28 25 20 / 5%);
  --radius: 14px;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --serif: "Source Serif 4", "Iowan Old Style", Georgia, serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0e1012;
  --surface: #16191c;
  --surface-2: #1d2125;
  --border: #282d32;
  --border-strong: #363c42;
  --text: #e8e6e1;
  --muted: #a3a8ae;
  --faint: #767c83;
  --accent: #5cc2b8;
  --accent-hover: #80d4cb;
  --accent-ink: #062321;
  --accent-soft: rgb(92 194 184 / 13%);
  --accent-line: rgb(92 194 184 / 45%);
  --warn: #f5b454;
  --warn-soft: rgb(245 180 84 / 12%);
  --danger: #f97066;
  --danger-soft: rgb(249 112 102 / 12%);
  --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 28px rgb(0 0 0 / 22%);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, textarea, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }

.i {
  width: 16px; height: 16px; flex: none;
  fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}

/* ── Buttons ──────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 36px; padding: 0 14px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); cursor: pointer;
  font-size: 14px; font-weight: 500; white-space: nowrap;
  transition: background .15s, border-color .15s, color .15s;
}
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn.ghost:hover { background: var(--surface-2); color: var(--text); }
.btn.danger:hover { color: var(--danger); border-color: var(--danger); background: var(--danger-soft); }
.btn.icon { width: 36px; padding: 0; justify-content: center; }
.btn.wide { width: 100%; justify-content: center; height: 42px; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* ── Shell: sidebar + main ────────────────────────────────────────────── */
.shell { display: grid; grid-template-columns: 280px minmax(0, 1fr); min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column; gap: 12px;
  padding: 16px 12px 12px;
  background: var(--surface); border-right: 1px solid var(--border);
}
.brand {
  display: flex; align-items: center; gap: 10px; padding: 4px 6px;
  font-family: var(--serif); font-size: 21px; font-weight: 600; letter-spacing: -.01em;
  color: var(--text);
}
.brand:hover { text-decoration: none; }
/* The logo's strokes are black, so it always sits on white: invisible against
   the light sidebar, a tile on the dark theme and the teal sign-in panel. */
.logo { width: 36px; height: 36px; flex: none; padding: 2px; border-radius: 9px; background: #fff; }
.brand-links { display: flex; gap: 6px; }
.brand-links a {
  flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 30px;
  border: 1px solid var(--border); border-radius: 8px; color: var(--muted); font-size: 12.5px; font-weight: 500;
}
.brand-links a:hover { border-color: var(--accent-line); color: var(--accent); text-decoration: none; }
.brand-links .i { width: 14px; height: 14px; }

.filter { position: relative; display: block; }
.filter .i { position: absolute; left: 11px; top: 10px; color: var(--faint); }
.filter input {
  width: 100%; height: 36px; padding: 0 10px 0 34px;
  border: 1px solid var(--border); border-radius: 10px; background: var(--bg);
}
.filter input:focus { outline: none; border-color: var(--accent); }

.history { flex: 1; overflow-y: auto; margin: 0 -6px; padding: 0 6px; }
.group {
  padding: 14px 8px 6px; color: var(--faint);
  font-size: 11.5px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
}
.hist { display: block; padding: 8px 10px; border-radius: 9px; color: var(--text); }
.hist:hover { background: var(--surface-2); text-decoration: none; }
.hist.active { background: var(--accent-soft); }
.hist span {
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  font-size: 13.5px; line-height: 1.4;
}
.hist small { display: flex; align-items: center; gap: 6px; color: var(--faint); font-size: 12px; }
.hist.live small { color: var(--accent); font-weight: 500; }
/* A saved conversation's item has a kebab at its right, shown while the item is
   hovered or focused, or its menu is open. The item keeps room for it, so the
   title doesn't re-wrap when it appears. Touch screens can't hover: always shown. */
.hist-row { position: relative; }
.hist-row .hist { padding-right: 36px; }
.hist-row:hover .hist:not(.active), .hist-row.menu-open .hist:not(.active) { background: var(--surface-2); }
.hist-more {
  position: absolute; top: 50%; right: 6px; transform: translateY(-50%);
  width: 28px; height: 28px; display: grid; place-items: center; padding: 0;
  border: 0; border-radius: 7px; background: transparent; color: var(--muted); cursor: pointer;
  opacity: 0; transition: opacity .1s, background .15s, color .15s;
}
.hist-row:hover .hist-more, .hist-row:focus-within .hist-more, .hist-row.menu-open .hist-more { opacity: 1; }
.hist-more:hover, .hist-row.menu-open .hist-more { background: var(--border); color: var(--text); }
@media (hover: none) { .hist-more { opacity: 1; } }

.menu {
  position: fixed; z-index: 40; min-width: 200px; padding: 5px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: 0 4px 10px rgb(0 0 0 / 8%), 0 12px 32px rgb(0 0 0 / 12%);
}
.menu button {
  display: flex; align-items: center; gap: 10px; width: 100%; height: 34px; padding: 0 10px;
  border: 0; border-radius: 8px; background: transparent; font-size: 13.5px; text-align: left; cursor: pointer;
}
.menu button:hover, .menu button:focus-visible { background: var(--surface-2); outline: none; }
.menu .i { color: var(--muted); }
.menu .danger, .menu .danger .i { color: var(--danger); }
.menu .danger:hover, .menu .danger:focus-visible { background: var(--danger-soft); }
.menu hr { margin: 5px 4px; border: 0; border-top: 1px solid var(--border); }
.pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: pulse 1.2s ease-in-out infinite; }
.empty { color: var(--faint); font-size: 13.5px; padding: 12px 8px; margin: 0; }

/* "Hosted on SciLifeLab Serve". The wordmark's text is near-black, so the dark
   theme swaps in serve-light.svg, the same logo with white text. */
.hosted {
  display: flex; align-items: center; gap: 8px; padding: 2px 6px;
  color: var(--faint); font-size: 12px; font-weight: 500;
}
.hosted:hover { color: var(--muted); text-decoration: none; }
.serve-logo { display: block; height: 18px; width: auto; }
.serve-logo.on-dark { display: none; }
:root[data-theme="dark"] .serve-logo.on-light { display: none; }
:root[data-theme="dark"] .serve-logo.on-dark { display: block; }

.me { display: flex; align-items: center; gap: 8px; padding: 12px 4px 0; border-top: 1px solid var(--border); }
.avatar {
  width: 32px; height: 32px; border-radius: 50%; flex: none; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); font-weight: 600;
}
.me .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }

.main { min-width: 0; padding: 28px clamp(16px, 4vw, 48px) 64px; }
.topbar { display: none; }
.scrim { display: none; }

/* ── Home ─────────────────────────────────────────────────────────────── */
.home { max-width: 760px; margin: 7vh auto 0; }
.home h1 {
  margin: 0 0 12px;
  font-family: var(--serif); font-size: clamp(34px, 5vw, 50px); font-weight: 600;
  line-height: 1.08; letter-spacing: -.02em;
}
.lede { margin: 0 0 28px; max-width: 620px; color: var(--muted); font-size: 17px; }
.composer {
  padding: 14px 14px 10px 18px;
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: 18px;
  box-shadow: var(--shadow); transition: border-color .15s, box-shadow .15s;
}
.composer:focus-within { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft), var(--shadow); }
.composer textarea {
  width: 100%; min-height: 80px; border: 0; outline: 0; resize: none; background: transparent;
  font-size: 17px; line-height: 1.5;
}
.composer-bar { display: flex; align-items: center; justify-content: flex-end; gap: 12px; margin-top: 6px; }
.examples { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.chip {
  padding: 7px 12px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--surface); color: var(--muted); font-size: 13.5px; text-align: left; cursor: pointer;
}
.chip:hover { color: var(--text); border-color: var(--border-strong); }
.how { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 52px; }
.how div { padding: 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.how b { display: block; margin: 10px 0 4px; font-size: 14px; }
.how p { margin: 0; color: var(--muted); font-size: 13.5px; }
.num {
  width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); font-size: 12px; font-weight: 600;
}

/* ── A conversation: header, turns, progress, answers, evidence ──────── */
.run { max-width: 1380px; margin: 0 auto; }
.eyebrow { color: var(--faint); font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.question {
  max-width: 920px; margin: 6px 0 14px;
  font-family: var(--serif); font-size: clamp(24px, 3vw, 33px); font-weight: 600;
  line-height: 1.2; letter-spacing: -.015em;
}
.run-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 22px; }
.run-meta { color: var(--faint); font-size: 13px; }
.actions { display: flex; flex-wrap: wrap; gap: 6px; }

/* The thread: each turn's question, how it was answered, and the answer. */
.thread { display: flex; flex-direction: column; gap: 28px; min-width: 0; }
.turn { display: flex; flex-direction: column; gap: 12px; scroll-margin-top: 16px; }
.turn:empty { display: none; }
.turn .searches, .turn .steps { margin: 0; }
.ask {
  align-self: flex-end; max-width: min(640px, 88%); padding: 10px 16px 12px;
  background: var(--accent-soft); border: 1px solid var(--accent-line); border-radius: 16px 16px 4px 16px;
}
.ask .label { display: flex; align-items: center; gap: 6px; color: var(--accent); }
.ask .i { width: 13px; height: 13px; }
.ask p { margin: 2px 0 0; font-size: 15.5px; white-space: pre-wrap; overflow-wrap: anywhere; }
.turn-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; color: var(--muted); font-size: 13.5px; }
.turn-meta > span { display: inline-flex; align-items: flex-start; gap: 6px; }
.turn-meta .i { width: 14px; height: 14px; color: var(--faint); }
.turn-meta > span > .i { margin-top: 3px; }
.pill {
  display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 11px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--surface);
  color: var(--muted); font-size: 13px; font-weight: 500; cursor: pointer;
}
.pill:hover { border-color: var(--border-strong); color: var(--text); }
.pill.active { border-color: var(--accent-line); background: var(--accent-soft); color: var(--accent); }
.pill.active .i { color: var(--accent); }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: -6px -10px 0 0; }
.btn.icon.sm { width: 30px; height: 30px; border-radius: 8px; }

/* The follow-up box rides along the bottom of the screen while the thread scrolls. */
.composer.follow { position: sticky; bottom: 14px; z-index: 2; padding: 10px 10px 8px 16px; border-radius: 16px; }
/* Covers the gap below the box, so the thread doesn't show through under it. */
.composer.follow::after { content: ""; position: absolute; left: -1px; right: -1px; top: 100%; height: 15px; background: var(--bg); }
.composer.follow textarea { min-height: 48px; font-size: 16px; }
.composer-hint { margin-right: auto; color: var(--faint); font-size: 12.5px; }
.follow-ups { margin-top: -18px; }

.steps {
  list-style: none; margin: 0 0 22px; padding: 14px 18px 0;
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; align-items: start;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
}
.step { display: flex; gap: 8px; color: var(--faint); }
.step .dot {
  width: 20px; height: 20px; flex: none; display: grid; place-items: center;
  border: 2px solid var(--border-strong); border-radius: 50%;
}
.step .dot .i { width: 12px; height: 12px; stroke-width: 3; }
.step b { font-size: 13.5px; font-weight: 600; line-height: 1.4; }
.step.done, .step.active { color: var(--text); }
.steps .now {
  grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 12px;
  padding: 10px 0 12px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px;
}
.step.done .dot { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.step.active .dot { border-color: var(--accent); border-top-color: transparent; animation: spin .9s linear infinite; }
.elapsed { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }

.run-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.panel {
  padding: 22px 26px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
}
.label { color: var(--faint); font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.note { margin: 16px 0 0; color: var(--muted); font-size: 13.5px; }

.prose { font-family: var(--serif); font-size: 17px; line-height: 1.68; }
.prose > :first-child { margin-top: 10px; }
.prose h1, .prose h2, .prose h3, .prose h4 { margin: 26px 0 8px; font-family: var(--sans); font-weight: 600; line-height: 1.3; }
.prose h1, .prose h2 { font-size: 17px; }
.prose h3, .prose h4 { font-size: 15px; }
.prose p, .prose ul, .prose ol { margin: 0 0 14px; }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin: 5px 0; }
.prose strong { font-weight: 600; }
.prose code { padding: 1px 5px; border-radius: 5px; background: var(--surface-2); font-family: var(--mono); font-size: .85em; }
.prose table { display: block; overflow-x: auto; width: 100%; margin: 12px 0 18px; border-collapse: collapse; font-family: var(--sans); font-size: 14px; }
.prose th, .prose td { padding: 8px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.prose th { background: var(--surface-2); font-weight: 600; }
.prose blockquote { margin: 0 0 14px; padding: 2px 16px; border-left: 3px solid var(--border-strong); color: var(--muted); }
.cite {
  display: inline-block; padding: 0 7px; border-radius: 6px; vertical-align: 1px;
  background: var(--accent-soft); color: var(--accent);
  font-family: var(--sans); font-size: 12.5px; font-weight: 500; line-height: 1.55; white-space: nowrap;
  transition: background .15s, color .15s;
}
.cite:hover, .cite.lit { background: var(--accent); color: var(--accent-ink); text-decoration: none; }

.searches { margin-bottom: 14px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.searches summary { padding: 12px 18px; color: var(--muted); font-size: 14px; font-weight: 500; cursor: pointer; }
.searches ol { margin: 0; padding: 0 18px 14px 44px; }
.searches li { margin: 6px 0; font-size: 13px; }
.searches a { color: var(--text); font-family: var(--mono); font-size: 12.5px; word-break: break-word; }
.searches a:hover { color: var(--accent); }

.evidence-col { position: sticky; top: 16px; max-height: calc(100vh - 32px); overflow-y: auto; padding-right: 4px; }
.evidence-head {
  position: sticky; top: 0; z-index: 1;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px;
  padding-bottom: 10px; background: var(--bg);
}
.evidence-head .label span { margin-left: 6px; color: var(--muted); font-weight: 500; letter-spacing: 0; text-transform: none; }
.evidence-tools { display: flex; gap: 6px; min-width: 0; }
.evidence-head select {
  height: 32px; padding: 0 8px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); font-size: 13px;
}
#evidence-turn { max-width: 240px; }
.evidence-empty {
  display: flex; gap: 10px; margin: 0; padding: 14px 16px;
  border: 1px dashed var(--border-strong); border-radius: var(--radius); color: var(--muted); font-size: 13.5px;
}
.evidence-empty .i { margin-top: 3px; color: var(--faint); }
.papers { display: flex; flex-direction: column; gap: 10px; }
.paper {
  padding: 14px 16px; scroll-margin: 60px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  transition: border-color .2s;
}
.paper:hover { border-color: var(--border-strong); }
.paper.flash { animation: flash 1.8s ease; }
.paper-top { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-bottom: 7px; }
.key { padding: 1px 8px; border-radius: 6px; background: var(--surface-2); color: var(--muted); font-size: 12px; font-weight: 600; }
.paper.cited .key { background: var(--accent-soft); color: var(--accent); }
.badge { padding: 0 7px; border: 1px solid var(--border); border-radius: 6px; color: var(--muted); font-size: 11.5px; line-height: 20px; }
.badge.warn { border-color: transparent; background: var(--warn-soft); color: var(--warn); }
.rank { margin-left: auto; color: var(--faint); font-size: 12px; font-variant-numeric: tabular-nums; }
.paper h3 { margin: 0 0 4px; font-family: var(--serif); font-size: 16px; font-weight: 600; line-height: 1.35; }
.paper h3 a { color: var(--text); }
.paper h3 a:hover { color: var(--accent); }
.byline, .venue { color: var(--muted); font-size: 13px; }
.venue { color: var(--faint); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.snippets { list-style: none; display: flex; flex-direction: column; gap: 6px; margin: 10px 0 0; padding: 0; }
.snippets li {
  padding: 8px 12px; border-radius: 8px;
  background: var(--surface-2); font-family: var(--serif); font-size: 14.5px; line-height: 1.55;
}
.snippets li.long { display: -webkit-box; -webkit-line-clamp: 6; -webkit-box-orient: vertical; overflow: hidden; cursor: pointer; }
.snippets li.long.open { display: block; }
.links { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 10px; font-size: 12.5px; }
.links a { display: inline-flex; align-items: center; gap: 4px; color: var(--muted); }
.links a:hover { color: var(--accent); }
.links .i { width: 12px; height: 12px; }

.error { display: flex; gap: 12px; align-items: flex-start; border-color: var(--danger); background: var(--danger-soft); }
.error > .i { width: 20px; height: 20px; margin-top: 2px; color: var(--danger); }
.error b { display: block; margin-bottom: 2px; }
.error p { margin: 0 0 12px; color: var(--muted); word-break: break-word; }

.skeleton {
  height: 14px; margin: 14px 0; border-radius: 6px;
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--border) 50%, var(--surface-2) 75%);
  background-size: 200% 100%; animation: shimmer 1.4s infinite linear;
}

.toast {
  position: fixed; left: 50%; bottom: 24px; z-index: 50; transform: translateX(-50%);
  padding: 10px 16px; border-radius: 10px; box-shadow: var(--shadow);
  background: var(--text); color: var(--bg); font-size: 14px; font-weight: 500;
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 50% { opacity: .3; } }
@keyframes shimmer { to { background-position: -200% 0; } }
@keyframes flash { 0%, 45% { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); } }

/* ── Sign-in page: one full-screen teal panel, the form card in the middle ── */
.auth {
  position: relative; overflow: hidden; min-height: 100vh;
  display: grid; grid-template-rows: auto 1fr auto; gap: 16px;
  padding: 28px clamp(20px, 5vw, 64px);
  color: #e6f3f1;
  background:
    radial-gradient(1100px 640px at 0% 0%, #168a83 0%, transparent 62%),
    radial-gradient(900px 600px at 100% 100%, #0c5e59 0%, transparent 60%),
    linear-gradient(160deg, #0a4f4b 0%, #052624 100%);
}
/* A faint grid that frames the card and fades out toward the edges. */
.auth::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgb(255 255 255 / 5%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 5%) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse at 50% 45%, #000 10%, transparent 70%);
}
.auth > * { position: relative; } /* paint above the grid */
.auth .brand { color: #fff; }
.auth-center { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 20px; }
.auth-center h1 {
  max-width: 900px; margin: 0; text-align: center; text-wrap: balance;
  font-family: var(--serif); font-size: clamp(26px, 2.8vw, 38px); font-weight: 600;
  line-height: 1.15; letter-spacing: -.02em;
}
.auth-card {
  width: 100%; max-width: 420px; padding: 32px;
  background: var(--surface); color: var(--text); border-radius: 20px;
  box-shadow: 0 24px 64px rgb(0 0 0 / 30%), 0 2px 6px rgb(0 0 0 / 12%);
}
.auth-foot { color: rgb(230 243 241 / 70%); font-size: 14px; text-align: center; }
.auth-foot a { color: #fff; text-decoration: underline; text-underline-offset: 2px; }
.auth-foot .hosted { justify-content: center; margin-bottom: 10px; color: inherit; font-size: 13px; text-decoration: none; }
.auth-foot .hosted:hover { color: #fff; }
.auth-foot .serve-logo { height: 22px; }
.auth-card h2 { margin: 0 0 22px; font-family: var(--serif); font-size: 28px; font-weight: 600; letter-spacing: -.01em; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 22px; padding: 4px; border-radius: 12px; background: var(--surface-2); }
.tabs button { height: 36px; border: 0; border-radius: 9px; background: transparent; color: var(--muted); font-weight: 500; cursor: pointer; }
.tabs button.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
.field { display: block; margin-bottom: 14px; font-size: 13.5px; font-weight: 500; }
.req { color: var(--danger); }
.field-status { display: flex; align-items: center; gap: 6px; margin-top: 6px; font-size: 12.5px; }
.field-status .i { width: 14px; height: 14px; }
.field.valid input { border-color: var(--accent); }
.field.valid .field-status { color: var(--accent); }
.field.invalid input { border-color: var(--danger); }
.field.invalid input:focus { box-shadow: 0 0 0 4px var(--danger-soft); }
.field.invalid .field-status { color: var(--danger); }
.field input {
  display: block; width: 100%; height: 42px; margin-top: 6px; padding: 0 12px;
  border: 1px solid var(--border-strong); border-radius: 10px; background: var(--surface);
}
.field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.form-error { margin: 0 0 14px; padding: 9px 12px; border-radius: 9px; background: var(--danger-soft); color: var(--danger); font-size: 13.5px; }
.hint { margin: 14px 0 0; color: var(--faint); font-size: 13px; text-align: center; }

/* ── Narrow screens ───────────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .run-grid { grid-template-columns: minmax(0, 1fr); }
  .evidence-col { position: static; max-height: none; overflow: visible; padding-right: 0; }
}
@media (max-width: 860px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed; inset: 0 auto 0 0; z-index: 30; width: min(300px, 86vw);
    transform: translateX(-100%); transition: transform .2s ease; box-shadow: var(--shadow);
  }
  .nav-open .sidebar { transform: none; }
  .nav-open .scrim { display: block; position: fixed; inset: 0; z-index: 20; background: rgb(0 0 0 / 35%); }
  .main { padding-top: 12px; }
  .topbar { display: flex; align-items: center; gap: 6px; margin: 0 0 12px -8px; }
  .topbar .brand { font-size: 18px; }
  .panel { padding: 18px; }
  .auth { padding: 20px 16px; gap: 20px; }
  .auth-card { padding: 24px 20px; }
}
@media (max-width: 960px) {
  .how { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .how { grid-template-columns: minmax(0, 1fr); }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .composer-hint { display: none; }
  .home { margin-top: 3vh; }
}