:root {
  --bg: #f6f7f9; --fg: #1b1f24; --muted: #5d6673; --line: #dde1e7; --card: #fff;
  --accent: #1f5fd1; --ok: #14733a; --warn: #8a5a00; --err: #b3261e;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14171b; --fg: #e8ebef; --muted: #98a2b0; --line: #2b3138; --card: #1b2026; --accent: #7aa7ff; --ok: #5fd08a; --warn: #e5b04a; --err: #ff8f87; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, sans-serif; }
.top { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--card); }
.brand { font-weight: 700; color: var(--fg); text-decoration: none; }
.brand span { font-weight: 400; color: var(--muted); margin-left: 8px; }
.who { display: flex; gap: 12px; align-items: center; margin: 0; }
main { max-width: 1040px; margin: 0 auto; padding: 24px 16px 64px; }
h1 { font-size: 1.6rem; margin: 0 0 8px; } h2 { font-size: 1.1rem; margin: 0 0 8px; } h3 { font-size: 1rem; margin: 16px 0 6px; }
.goal, .muted { color: var(--muted); } .small { font-size: .9rem; margin-top: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px; margin: 16px 0; }
.narrow { max-width: 440px; margin: 48px auto; }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; } .cols .card { margin: 16px 0 0; }
@media (max-width: 760px) { .cols { grid-template-columns: 1fr; } }
.stack { display: flex; flex-direction: column; gap: 12px; } .row { display: flex; gap: 12px; align-items: end; flex-wrap: wrap; }
label { display: flex; flex-direction: column; gap: 4px; font-size: .9rem; }
input, select { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--fg); min-width: 0; }
button, .btn { font: inherit; padding: 8px 14px; border: 1px solid var(--line); border-radius: 6px; background: var(--card); color: var(--fg); cursor: pointer; text-decoration: none; display: inline-block; }
button.primary, .btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { button.primary, .btn.primary { color: #0b1220; } }
button.link { border: 0; background: none; color: var(--accent); padding: 0; text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
a { color: var(--accent); }
.flash { padding: 10px 14px; border-radius: 6px; border: 1px solid var(--line); background: var(--card); }
.flash.ok { border-color: var(--ok); } .flash.err { border-color: var(--err); }
.steps { list-style: none; padding: 0; margin: 16px 0; display: flex; flex-direction: column; gap: 8px; }
.steps li { display: grid; grid-template-columns: 56px 1fr auto; gap: 12px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }
.steps li.locked { opacity: .55; } .steps li.passed .state { color: var(--ok); } .steps li.current { border-color: var(--accent); }
.steps .id { font-family: ui-monospace, monospace; font-weight: 700; }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; margin: 0 0 8px; }
.facts dt { color: var(--muted); } .facts dd { margin: 0; overflow-wrap: anywhere; }
code, pre { font-family: ui-monospace, monospace; font-size: .9em; } pre { background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 10px; overflow-x: auto; white-space: pre-wrap; overflow-wrap: anywhere; }
.ticket { border-top: 1px solid var(--line); margin-top: 12px; padding-top: 4px; }
.hints { color: var(--muted); padding-left: 20px; }
.log { list-style: none; margin: 0; padding: 0; max-height: 320px; overflow-y: auto; font-size: .9rem; }
.log li { display: grid; grid-template-columns: 70px 1fr; gap: 2px 8px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.log li code { grid-column: 2; color: var(--muted); } .log .empty { color: var(--muted); display: block; }
.result { list-style: none; padding: 10px 14px; margin: 12px 0; border-radius: 6px; border: 1px solid var(--line); }
.result .head { font-weight: 700; } .result.pass { border-color: var(--ok); } .result.pass .head { color: var(--ok); }
.result.notyet .head, .result.inconclusive .head { color: var(--warn); }
fieldset { border: 1px solid var(--line); border-radius: 6px; } .opt { flex-direction: row; gap: 8px; align-items: center; font-size: 1rem; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; } th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); } .scroll { overflow-x: auto; }

.narrow-form { max-width: 480px; } details summary { cursor: pointer; color: var(--accent); }