:root {
  color-scheme: dark;
  --bg: #0f1115;
  --card: #181b22;
  --border: #2a2f3a;
  --text: #e8eaf0;
  --muted: #9aa3b5;
  --accent: #9b6bff;
  --good: #3ccf7e;
  --bad: #ff5d6c;
  --warn: #ffc24b;
}

* { box-sizing: border-box; }

/* Elements with a display rule of their own (label, .timer) must still hide. */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
}

h1 { font-size: 18px; margin: 0; }
h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 8px; }
h2:not(:first-child) { margin-top: 18px; }

.status { display: flex; gap: 8px; }
.pill {
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}
.pill.ok { color: var(--good); border-color: var(--good); }
.pill.warn { color: var(--warn); border-color: var(--warn); }
.pill.bad { color: var(--bad); border-color: var(--bad); }

.banner { margin: 12px 20px 0; padding: 10px 14px; border-radius: 8px; }
.banner.bad { background: color-mix(in srgb, var(--bad) 20%, transparent); }
.banner.warn { background: color-mix(in srgb, var(--warn) 20%, transparent); }

main {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 16px;
  padding: 16px 20px 32px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  min-width: 0;
}

.question-card { grid-column: 1 / -1; }
.meta { display: flex; gap: 12px; color: var(--muted); font-size: 13px; }
.meta .score { margin-left: auto; }
.question { font-size: 26px; font-weight: 600; margin: 8px 0; }

.timer { display: flex; align-items: center; gap: 10px; margin-top: 8px; }
.timer .track { flex: 1; height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.timer .bar { height: 100%; width: 100%; background: var(--accent); transition: width .2s linear; }
.timer .bar.low { background: var(--warn); }
.timer span { font-variant-numeric: tabular-nums; min-width: 3ch; text-align: right; }

.verdict { margin-top: 12px; padding: 10px 14px; border-radius: 8px; font-size: 18px; }
.verdict.correct { background: color-mix(in srgb, var(--good) 20%, transparent); }
.verdict.incorrect, .verdict.timeout, .verdict.passed { background: color-mix(in srgb, var(--bad) 18%, transparent); }
.verdict.voided { background: var(--border); }

.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: end; margin-bottom: 8px; }
label { display: flex; flex-direction: column; gap: 2px; font-size: 12px; color: var(--muted); }
input, select, button {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
}
input[type="number"] { width: 80px; }
button { cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--muted); }
button:disabled { opacity: .45; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.good { border-color: var(--good); color: var(--good); }
button.bad { border-color: var(--bad); color: var(--bad); }

.help { color: var(--muted); font-size: 13px; margin: 4px 0 0; }
code { background: var(--bg); padding: 1px 5px; border-radius: 4px; }

.lines { list-style: none; margin: 0; padding: 0; max-height: 260px; overflow-y: auto; font-size: 14px; }
.lines li { padding: 3px 0; border-bottom: 1px solid var(--border); overflow-wrap: anywhere; }
.lines time { color: var(--muted); font-size: 12px; margin-right: 6px; font-variant-numeric: tabular-nums; }
.interim { color: var(--muted); font-style: italic; min-height: 1.5em; margin: 6px 0 0; }