[hidden] { display: none !important; }
:root {
  --bg: #000;
  --fg: #fff;
  --muted: #a3a3a3;
  --line: #2e2e2e;
  --panel: #0d0d0d;
  --pass: #4ade80;
  --fail: #f87171;
  --pending: #facc15;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--fg); }
body { font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding: 20px 16px; border-bottom: 1px solid var(--line); }
h1 { margin: 0; font-size: 2rem; font-weight: 900; letter-spacing: .12em; }
h2 { font-weight: 800; }
nav { display: flex; flex-wrap: wrap; gap: 8px; }
main { max-width: 1200px; margin: 0 auto; padding: 24px 16px 64px; }
label { display: block; margin: 16px 0 6px; font-weight: 600; }
.hint, .meta { color: var(--muted); font-weight: 400; font-size: .9rem; }
input, select, textarea { width: 100%; padding: 10px 12px; background: var(--panel); color: var(--fg); border: 1px solid var(--line); border-radius: 6px; font: inherit; }
button { padding: 10px 16px; background: var(--fg); color: var(--bg); border: 0; border-radius: 6px; font: inherit; font-weight: 700; cursor: pointer; }
button:disabled { opacity: .4; cursor: default; }
button.secondary, nav button { background: transparent; color: var(--fg); border: 1px solid var(--line); }
button.link { background: none; color: var(--muted); text-decoration: underline; padding: 10px 0; }
form button[type=submit] { margin-top: 16px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 12px; }
.row select { flex: 1 1 240px; width: auto; }
#flash { padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px; }
#flash.error { border-color: var(--fail); color: var(--fail); }
.notice { font-size: 1.1rem; font-weight: 700; }
.step { border: 1px solid var(--line); border-radius: 8px; margin: 16px 0; overflow: hidden; }
.step h3 { margin: 0; padding: 10px 12px; background: var(--panel); font-size: 1rem; border-bottom: 1px solid var(--line); }
.step .prompt { padding: 10px 12px; color: var(--muted); border-bottom: 1px solid var(--line); white-space: pre-wrap; }
.pair { display: grid; grid-template-columns: 1fr 1fr; }
.pair > div { padding: 10px 12px; min-width: 0; }
.pair > div + div { border-left: 1px solid var(--line); }
.pair h4 { margin: 0 0 6px; font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.answer { white-space: pre-wrap; overflow-wrap: anywhere; }
pre.raw { margin: 0; max-height: 420px; overflow: auto; font-size: .78rem; white-space: pre-wrap; overflow-wrap: anywhere; color: var(--muted); }
.waiting { color: var(--pending); }
.score { border: 1px solid var(--line); border-radius: 8px; padding: 12px; margin: 16px 0; }
.score table { width: 100%; }
.pass { color: var(--pass); } .fail { color: var(--fail); } .pending { color: var(--pending); } .na { color: var(--muted); }
table { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: .92rem; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
td button { padding: 4px 10px; font-size: .85rem; }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px; }
.compare > div { min-width: 0; }
@media (max-width: 760px) {
  .pair, .compare { grid-template-columns: 1fr; }
  .pair > div + div { border-left: 0; border-top: 1px solid var(--line); }
  #runs th:nth-child(5), #runs td:nth-child(5) { display: none; }
}
.pad { padding: 10px 12px; }
@media (max-width: 760px) {
  #users, #runs { display: block; overflow-x: auto; white-space: nowrap; }
}
.grid { margin-bottom: 8px; }
.grid table { margin-top: 4px; }
.grid th { width: 34%; font-weight: 600; }
.grid td, .grid th { padding: 4px; }
.grid button.cell { width: 100%; padding: 8px 6px; font-size: .85rem; }
.grid button.cell.next { background: var(--fg); color: var(--bg); }
.grid button.cell.done { background: transparent; color: var(--pass); border: 1px solid var(--pass); opacity: 1; }
.result-card { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; margin: 8px 0; background: var(--panel); }
.result-card h4 { margin: 0 0 8px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.stat { display: flex; flex-direction: column; }
.stat .meta { font-size: .75rem; }
footer a, a.navlink { color: var(--muted); }
a.navlink { padding: 10px 16px; border: 1px solid var(--line); border-radius: 6px; text-decoration: none; color: var(--fg); font-weight: 700; }
.trust { max-width: 760px; }
.trust li { margin: 8px 0; }
.brand .sub { margin: 2px 0 0; color: var(--muted); font-size: .85rem; letter-spacing: .3em; text-transform: uppercase; }
h1 .tm { font-size: .35em; font-weight: 700; vertical-align: super; letter-spacing: 0; margin-left: 2px; }
a.button-link { display: inline-block; padding: 10px 16px; background: var(--fg); color: var(--bg); border-radius: 6px; font-weight: 700; text-decoration: none; }
#google-login { margin-bottom: 8px; }
footer { padding: 24px 16px 32px; text-align: center; color: var(--muted); font-size: .8rem; letter-spacing: .08em; border-top: 1px solid var(--line); }
label.check { display: block; font-weight: 400; }
label.check .hint { display: block; margin-left: 26px; }
label.check input { width: auto; margin: 0 8px 0 0; vertical-align: middle; }