:root {
  --bg: #f6f7f9; --fg: #1d2127; --muted: #6b7280; --line: #e2e5ea; --card: #fff;
  --accent: #2563eb; --accent-fg: #fff; --pass: #15803d; --pass-bg: #e7f6ec;
  --fail: #b91c1c; --fail-bg: #fdecec; --warn: #b45309; --warn-bg: #fff4e0; --info-bg: #e8f0fe;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--fg); background: var(--bg); }
a { color: var(--accent); text-decoration: none; } a:hover { text-decoration: underline; }
code, pre, .mono { font-family: var(--mono); font-size: 13px; }
pre { background: #0f172a; color: #e2e8f0; padding: 12px; border-radius: 6px; overflow: auto; max-height: 60vh; white-space: pre; }
header.top { display: flex; justify-content: space-between; align-items: center; padding: 10px 24px; background: #111827; color: #fff; }
header.top a { color: #fff; margin-left: 16px; } header .brand { font-weight: 700; margin-left: 0; }
header nav { display: flex; align-items: center; }
main { max-width: 1400px; margin: 0 auto; padding: 20px 24px 60px; }
h1 { font-size: 24px; margin: 8px 0 12px; } h2 { font-size: 18px; margin: 22px 0 8px; } h3 { font-size: 15px; margin: 18px 0 6px; }
h2.part { color: var(--muted); font-weight: 600; text-transform: uppercase; font-size: 13px; letter-spacing: .05em; margin-top: 26px; }
.muted { color: var(--muted); } .small { font-size: 13px; } .lead { font-size: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 20px; }
.narrow { max-width: 480px; margin: 40px auto; }
label { display: block; margin: 10px 0; } label input, label select { display: block; width: 100%; margin-top: 4px; }
input, select { font: inherit; padding: 7px 9px; border: 1px solid #cfd4dc; border-radius: 6px; } input.short { width: 70px; display: inline-block; }
button { font: inherit; padding: 8px 14px; border: 0; border-radius: 6px; background: var(--accent); color: var(--accent-fg); cursor: pointer; }
button.secondary { background: #e5e7eb; color: var(--fg); } button:disabled { opacity: .5; cursor: default; }
button.linkish { background: none; color: var(--accent); padding: 0; margin-left: 10px; } button.linkish.danger { color: var(--fail); }
form.inline { display: inline; }
.flash { padding: 10px 14px; border-radius: 6px; margin: 10px 0; }
.flash.ok { background: var(--pass-bg); color: var(--pass); } .flash.bad { background: var(--fail-bg); color: var(--fail); } .flash.info { background: var(--info-bg); }
.crumbs { color: var(--muted); font-size: 13px; margin-bottom: 4px; }
.subnav { display: flex; justify-content: space-between; font-size: 13px; margin: 4px 0 10px; }
.badge { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 999px; background: #e5e7eb; color: #374151; vertical-align: middle; }
.badge.pass, .badge.st-pass { background: var(--pass-bg); color: var(--pass); }
.badge.partial { background: var(--warn-bg); color: var(--warn); }
.badge.st-fail, .badge.st-compile_error, .badge.st-timeout, .badge.st-error { background: var(--fail-bg); color: var(--fail); }
.badge.st-queued, .badge.st-running { background: var(--info-bg); color: var(--accent); }
ul.chapters { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 8px; }
ul.chapters a { display: flex; align-items: center; gap: 10px; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; color: var(--fg); }
ul.chapters .num { font-family: var(--mono); color: var(--muted); } ul.chapters .title { flex: 1; } ul.chapters li.done a { border-color: #bbf7d0; }
.cols { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 28px; }
@media (max-width: 1000px) { .cols { grid-template-columns: 1fr; } }
.col.side { border-left: 1px solid var(--line); padding-left: 24px; }
@media (max-width: 1000px) { .col.side { border-left: 0; padding-left: 0; } }
ol.subparts { list-style: none; padding: 0; margin: 0; } ol.subparts li { padding: 7px 10px; border: 1px solid var(--line); border-radius: 6px; margin-bottom: 6px; background: var(--card); }
ol.subparts.compact li { padding: 3px 8px; margin-bottom: 3px; border: 0; background: none; } ol.subparts li.current { background: var(--info-bg); }
ol.subparts .file { float: right; font-family: var(--mono); font-size: 12px; color: var(--muted); }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; background: #cbd5e1; margin-right: 4px; }
li.st-pass .dot { background: var(--pass); } li.st-fail .dot { background: var(--fail); } li.st-untested .dot { background: #cbd5e1; }
ul.plain { list-style: none; padding: 0; } ul.plain li { margin: 3px 0; }
table.files, table.runs { border-collapse: collapse; width: 100%; background: var(--card); }
table.files td, table.files th, table.runs td, table.runs th { border-bottom: 1px solid var(--line); padding: 6px 8px; text-align: left; font-size: 14px; }
td.actions form { margin-left: 0; } td.actions button.linkish { margin-left: 0; margin-right: 10px; } td.actions a { margin-right: 10px; }
form.upload { margin: 10px 0 16px; display: flex; flex-wrap: wrap; align-items: end; gap: 10px; } form.upload label { margin: 0; }
.runbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 14px 0; }
.md { line-height: 1.55; } .md pre { max-height: none; } .md code { background: #eef0f3; padding: 1px 4px; border-radius: 3px; } .md pre code { background: none; padding: 0; }
.md table { border-collapse: collapse; } .md td, .md th { border: 1px solid var(--line); padding: 4px 8px; }
.md.excerpt { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 6px 16px; }
details > summary { cursor: pointer; color: var(--accent); margin: 6px 0; }
details.code-block pre { margin-top: 6px; }
.editor-wrap { margin: 14px 0; } .editor-head { display: flex; justify-content: space-between; margin-bottom: 4px; }
.cm-host { border: 1px solid #cfd4dc; border-radius: 6px; overflow: hidden; } .cm-host .cm-editor { max-height: 70vh; } .cm-host .cm-scroller { overflow: auto; }
.cm-source { width: 100%; min-height: 200px; font-family: var(--mono); font-size: 13px; display: block; border: 0; padding: 8px; }
.save-status.saving { color: var(--warn); } .save-status.saved { color: var(--pass); } .save-status.error { color: var(--fail); font-weight: 600; }
ul.checks { list-style: none; padding: 0; font-family: var(--mono); font-size: 13px; } ul.checks li { padding: 3px 6px; border-left: 3px solid #cbd5e1; margin: 2px 0; }
ul.checks li.k-PASS { border-color: var(--pass); } ul.checks li.k-FAIL { border-color: var(--fail); background: var(--fail-bg); } ul.checks li.k-SKIP { border-color: var(--warn); }
ul.checks .kind { display: inline-block; width: 44px; font-weight: 700; }
pre.output { max-height: 70vh; }
.gridwrap { overflow: auto; } table.grid { border-collapse: collapse; background: var(--card); font-size: 13px; }
table.grid th, table.grid td { border: 1px solid var(--line); padding: 3px 5px; text-align: center; min-width: 30px; }
table.grid .sticky { position: sticky; left: 0; background: var(--card); text-align: left; }
table.grid td.pass { background: var(--pass-bg); } table.grid td.partial { background: var(--warn-bg); } table.grid td a { color: inherit; display: block; }