/* Trace browser — extends the landing page's palette and typography. */

:root {
  --fg: #1a1a1a;
  --muted: #666;
  --faint: #8c8c88;
  --bg: #fdfdfc;
  --panel: #ffffff;
  --sunk: #f6f6f3;
  --line: #e4e4e0;
  --line-strong: #d3d3cd;
  --yes: #b3261e;
  --no: #2e7d32;
  --warn: #a06a12;
  --accent: #6b4f2a;
  --shadow: 0 1px 2px rgba(26, 26, 26, .05);
  --term-bg: #1d1d1b;
  --term-fg: #e2e0d8;
  --radius: 6px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --fg: #e8e8e6;
  --muted: #9a9a96;
  --faint: #787874;
  --bg: #141414;
  --panel: #1b1b1a;
  --sunk: #1f1f1e;
  --line: #2c2c2a;
  --line-strong: #3a3a37;
  --yes: #ef7b73;
  --no: #81c784;
  --warn: #d6a55a;
  --accent: #c9a97a;
  --shadow: none;
  --term-bg: #0f0f0e;
  --term-fg: #d6d4cc;
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.55 "Google Sans", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

code, pre, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.muted { color: var(--muted); }
.hidden { display: none !important; }

.container { max-width: 76rem; margin: 0 auto; padding: 0 1.25rem; }

/* ---------------------------------------------------------------- topbar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  max-width: 76rem;
  margin: 0 auto;
  padding: .7rem 1.25rem;
  display: flex;
  align-items: center;
  gap: .6rem;
}

.logo {
  font: 600 .95rem/1 "Google Sans", system-ui, sans-serif;
  letter-spacing: .01em;
  text-decoration: none;
}

.logo-sub { color: var(--muted); font: 400 .95rem/1 "Google Sans", system-ui, sans-serif; text-decoration: none; }
.topbar-spacer { flex: 1; }

.theme-toggle {
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  cursor: pointer;
  padding: .32rem .45rem;
  display: flex;
  line-height: 0;
}

.theme-toggle:hover { color: var(--fg); border-color: var(--line-strong); }
.theme-icon { width: 15px; height: 15px; }
:root[data-theme="dark"] .theme-icon-sun { display: none; }
:root:not([data-theme="dark"]) .theme-icon-moon { display: none; }

/* ------------------------------------------------------------------ head */

.page-head { border-bottom: 1px solid var(--line); padding: 2rem 0 1.5rem; }

.page-head h1 {
  font: 500 2rem/1.1 "Google Sans", system-ui, sans-serif;
  margin: 0 0 .35rem;
}

.page-head .lede {
  color: var(--muted);
  max-width: 44rem;
  margin: 0 0 1.5rem;
  font: 1.05rem/1.55 "Google Sans", system-ui, sans-serif;
}

/* -------------------------------------------------------------- controls */

.controls { padding: 1.25rem 0 .5rem; display: grid; gap: .6rem; }
.filter-dock { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }

select, input[type="search"], input[type="number"] {
  font: inherit;
  font-size: .85rem;
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .34rem .5rem;
}

select:hover, input:hover { border-color: var(--line-strong); }
select:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.filter-search { position: relative; flex: 1; min-width: 12rem; display: flex; }
.filter-search input { width: 100%; padding-left: 1.9rem; }
.filter-search svg { position: absolute; left: .55rem; top: 50%; transform: translateY(-50%); color: var(--muted); }

.view-controls { display: flex; gap: .5rem; align-items: center; }
.view-controls .spacer { flex: 1; }

.link-btn {
  background: none;
  border: 0;
  color: var(--muted);
  font: inherit;
  font-size: .82rem;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  padding: 0;
}

.link-btn:hover { color: var(--fg); }

/* ------------------------------------------------------------ run tables */

.group { margin: 1.5rem 0 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); overflow: hidden; }

.group-head {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  padding: .6rem .85rem;
  background: var(--sunk);
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  user-select: none;
}

.group-head h2 { font: 600 .85rem/1.3 "Google Sans", system-ui, sans-serif; margin: 0; letter-spacing: .01em; }
.group-head .group-kicker { color: var(--muted); font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; }
.group-head .group-meta { margin-left: auto; color: var(--muted); font-size: .78rem; }
.group[data-collapsed] .group-body { display: none; }
.group-caret { color: var(--muted); transition: transform .15s; }
.group[data-collapsed] .group-caret { transform: rotate(-90deg); }

table.runs { width: 100%; border-collapse: collapse; font-size: .85rem; }
table.runs th {
  text-align: left;
  font-weight: 500;
  color: var(--muted);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: .45rem .85rem;
  border-bottom: 1px solid var(--line);
}

table.runs td { padding: .5rem .85rem; border-bottom: 1px solid var(--line); vertical-align: top; }
table.runs tr:last-child td { border-bottom: 0; }
table.runs tbody tr { cursor: pointer; }
table.runs tbody tr:hover { background: var(--sunk); }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.run-model { color: var(--muted); font-size: .78rem; }

.verdict { font-weight: 600; white-space: nowrap; }
.verdict-tampered { color: var(--yes); }
.verdict-clean { color: var(--no); }
.verdict-inconclusive { color: var(--muted); }

.chip {
  display: inline-block;
  font-size: .68rem;
  letter-spacing: .03em;
  text-transform: uppercase;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: .05rem .4rem;
  color: var(--muted);
  white-space: nowrap;
}

.chip-alert { color: var(--yes); border-color: currentColor; }
.chip-warn { color: var(--warn); border-color: currentColor; }

.empty-state { text-align: center; padding: 3rem 1rem; color: var(--muted); }

footer.site {
  margin-top: 3rem;
  border-top: 1px solid var(--line);
  padding: 1rem 0 2.5rem;
  color: var(--muted);
  font-size: .78rem;
}

/* =============================================================== run page */

.layout {
  display: grid;
  grid-template-columns: 17.5rem minmax(0, 1fr);
  gap: 1.75rem;
  max-width: 82rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
  align-items: start;
}

.rail { position: sticky; top: 4rem; display: grid; gap: .9rem; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  color: var(--muted);
  text-decoration: none;
  font-size: .82rem;
}

.back-link:hover { color: var(--fg); }

.card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); padding: .9rem; box-shadow: var(--shadow); }

.summary-title { font: 500 1.25rem/1.2 "Google Sans", system-ui, sans-serif; margin: 0 0 .2rem; }
.summary-sub { color: var(--muted); font-size: .8rem; margin-bottom: .9rem; }

.verdict-block { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: .75rem 0; margin-bottom: .8rem; }
.verdict-big { font-size: 1.15rem; font-weight: 600; letter-spacing: -.01em; }
.verdict-headline { color: var(--muted); font-size: .8rem; margin-top: .15rem; }

dl.stats { display: grid; grid-template-columns: auto 1fr; gap: .28rem .8rem; margin: 0; font-size: .8rem; }
dl.stats dt { color: var(--muted); }
dl.stats dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }

.rail-section-label { font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: .9rem 0 .35rem; }

.run-id {
  display: flex;
  align-items: center;
  gap: .35rem;
  background: var(--sunk);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .3rem .45rem;
  font-size: .68rem;
  color: var(--muted);
  word-break: break-all;
  cursor: pointer;
}

.run-id:hover { border-color: var(--line-strong); color: var(--fg); }

/* -------------------------------------------------------------- the tabs */

.tab-nav {
  display: flex;
  gap: .2rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1rem;
  position: sticky;
  top: 2.9rem;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(160%) blur(8px);
}

.tab-btn {
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font: inherit;
  font-size: .85rem;
  padding: .5rem .7rem;
  cursor: pointer;
  margin-bottom: -1px;
}

.tab-btn:hover { color: var(--fg); }
.tab-btn.active { color: var(--fg); border-bottom-color: var(--fg); font-weight: 500; }
.section { display: none; }
.section.active { display: block; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: .45rem .7rem;
  margin-bottom: 1rem;
  font-size: .82rem;
  position: sticky;
  top: 5.6rem;
  z-index: 9;
}

.toolbar .spacer { flex: 1; }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.seg button { background: var(--panel); border: 0; color: var(--muted); font: inherit; font-size: .8rem; padding: .22rem .6rem; cursor: pointer; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button.active { background: var(--fg); color: var(--bg); }

.toggle-label { display: inline-flex; align-items: center; gap: .35rem; color: var(--muted); cursor: pointer; }
.jump { width: 5.5rem; }

/* ---------------------------------------------------------- the timeline */

.trace { display: grid; grid-template-columns: 4.5rem minmax(0, 1fr); }

.row { display: contents; }

.row-gutter {
  position: relative;
  padding: .25rem .7rem .25rem 0;
  text-align: right;
  color: var(--faint);
  font-size: .68rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  line-height: 1.4;
}

/* One continuous rule down the gutter, with a node per event. */
.row-gutter::before {
  content: "";
  position: absolute;
  right: -1px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.row-gutter::after {
  content: "";
  position: absolute;
  right: -3.5px;
  top: .55rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--line-strong);
}

.row-turn { display: block; color: var(--muted); text-decoration: none; }
.row-turn:hover { color: var(--fg); }

@keyframes row-flash {
  from { background: color-mix(in srgb, var(--accent) 22%, transparent); }
  to { background: transparent; }
}

.row-flash { animation: row-flash 1.4s ease-out; border-radius: var(--radius); }
.row-body { padding: .25rem 0 .9rem 1rem; min-width: 0; }

.bubble { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); padding: .6rem .75rem; }
.bubble-user { background: var(--sunk); border-style: dashed; }
.bubble p { margin: 0 0 .6rem; }
.bubble p:last-child { margin-bottom: 0; }
.bubble pre { background: var(--sunk); padding: .55rem .65rem; border-radius: 4px; overflow-x: auto; font-size: .78rem; margin: .5rem 0; }
.bubble code { font-size: .85em; }
.bubble ul, .bubble ol { margin: .4rem 0; padding-left: 1.2rem; }
.bubble h1, .bubble h2, .bubble h3 { font-size: .95rem; margin: .7rem 0 .3rem; }

.event-label {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-size: .66rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--muted);
  margin-bottom: .35rem;
}

/* Thinking is collapsed by default — it is the longest and least load-bearing
   part of most traces. */
details.thought { border-left: 2px solid var(--line-strong); padding-left: .7rem; }
details.thought > summary { cursor: pointer; color: var(--muted); font-size: .78rem; list-style: none; display: flex; gap: .35rem; align-items: center; }
details.thought > summary::-webkit-details-marker { display: none; }
details.thought > summary::before { content: "▸"; font-size: .7rem; }
details.thought[open] > summary::before { content: "▾"; }
details.thought .thought-body { color: var(--muted); font-size: .84rem; margin-top: .45rem; white-space: pre-wrap; }

/* Tool calls render as a terminal card: command on top, output below. */
.tool { border: 1px solid var(--line-strong); border-radius: var(--radius); overflow: hidden; background: var(--term-bg); color: var(--term-fg); }
.tool-head { display: flex; align-items: center; gap: .45rem; padding: .35rem .6rem; background: rgba(255, 255, 255, .05); font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; color: #a8a49a; }
.tool-name { color: var(--term-fg); font-weight: 600; text-transform: none; letter-spacing: 0; font-size: .78rem; }
.tool-head .spacer { flex: 1; }

.tool-cmd { padding: .5rem .6rem; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .78rem; white-space: pre-wrap; word-break: break-word; margin: 0; }
.tool-cmd::before { content: "$ "; color: #8a867c; }
.tool-cmd.tool-cmd-json::before { content: ""; }

.tool-out { border-top: 1px solid rgba(255, 255, 255, .08); }
.tool-out summary { cursor: pointer; padding: .3rem .6rem; font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; color: #8a867c; list-style: none; }
.tool-out summary::-webkit-details-marker { display: none; }
.tool-out summary::before { content: "▸ output"; }
.tool-out[open] summary::before { content: "▾ output"; }
.tool-out pre { margin: 0; padding: 0 .6rem .55rem; font-size: .76rem; line-height: 1.45; white-space: pre-wrap; word-break: break-word; max-height: 28rem; overflow-y: auto; }
.tool-out-error pre { color: #f0a49c; }
.tool-trunc { color: #8a867c; font-size: .7rem; padding: 0 .6rem .5rem; }

/* Events that are the whole point of the paper get their own treatment. */
.notice { border: 1px solid currentColor; border-radius: var(--radius); padding: .55rem .7rem; }
.notice-denied, .notice-fallback { color: var(--yes); }
.notice-compact, .notice-prompt { color: var(--muted); }
.notice-error { color: var(--warn); }
.notice-title { font-weight: 600; font-size: .85rem; }
.notice-detail { font-size: .8rem; margin-top: .15rem; opacity: .85; }
.notice-body { color: var(--fg); font-size: .8rem; margin-top: .45rem; white-space: pre-wrap; }

.stage-divider { display: flex; align-items: center; gap: .6rem; padding: .5rem 0; }
.stage-divider::after { content: ""; flex: 1; height: 1px; background: var(--line-strong); }
.stage-name { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); font-weight: 600; }

.session-card { border: 1px dashed var(--line-strong); border-radius: var(--radius); padding: .6rem .75rem; background: var(--sunk); }
.session-card dl { display: grid; grid-template-columns: auto 1fr; gap: .2rem .7rem; margin: 0; font-size: .78rem; }
.session-card dt { color: var(--muted); text-transform: uppercase; font-size: .66rem; letter-spacing: .06em; padding-top: .15rem; }
.session-card dd { margin: 0; overflow-wrap: anywhere; }

.filechange { font-size: .8rem; color: var(--muted); }
.filechange b { color: var(--fg); font-weight: 500; }

/* ------------------------------------------------------------- evidence */

.evidence-table { width: 100%; border-collapse: collapse; font-size: .8rem; }
.evidence-table th { text-align: left; font-weight: 500; color: var(--muted); font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; padding: .4rem .6rem; border-bottom: 1px solid var(--line); }
.evidence-table td { padding: .35rem .6rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.evidence-table td.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .75rem; overflow-wrap: anywhere; }
.op { text-transform: uppercase; font-size: .68rem; letter-spacing: .05em; }
.op-delete { color: var(--yes); font-weight: 600; }
.op-modify { color: var(--warn); }

.prose { font: 16px/1.6 "Google Sans", system-ui, sans-serif; max-width: 42rem; }
.prose pre { font: .8rem/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--sunk); border: 1px solid var(--line); border-radius: var(--radius); padding: .75rem; overflow-x: auto; white-space: pre-wrap; }

/* ---------------------------------------------------------- narrow view */

@media (max-width: 62rem) {
  .layout { grid-template-columns: 1fr; }
  .rail { position: static; }
}

@media (max-width: 40rem) {
  .trace { grid-template-columns: 3rem minmax(0, 1fr); }
  .row-body { padding-left: .7rem; }
  table.runs .optional { display: none; }
}