:root {
  --ink: #1f2421;
  --paper: #faf8f4;
  --accent: #b5502e;
  --accent-soft: #f0e2d8;
  --line: #ddd6cc;
  --good: #4a7856;
  --bad: #b5502e;
  --muted: #7a746a;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  margin: 0;
  padding: 0;
  line-height: 1.5;
}

.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 4px;
}

h2 {
  font-size: 1.1rem;
  margin-top: 32px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
}

.subtitle {
  color: var(--muted);
  margin-top: 0;
  margin-bottom: 24px;
}

.card {
  background: white;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 4px;
  margin-top: 14px;
}

input[type="text"], input[type="number"], textarea, select {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
  background: white;
}

textarea { resize: vertical; }

button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 10px 18px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 16px;
}

button:hover { opacity: 0.9; }

button.secondary {
  background: white;
  color: var(--ink);
  border: 1px solid var(--line);
}

button.ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 6px 12px;
  font-size: 0.85rem;
  margin-top: 0;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.question-block {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  margin-top: 14px;
  background: var(--accent-soft);
}

.question-block .q-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent);
  color: white;
}

.option-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.option-row input[type="text"] { flex: 1; }
.option-row input[type="radio"] { width: 18px; height: 18px; }

.code-display {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-align: center;
  padding: 16px;
  background: var(--accent-soft);
  border-radius: 10px;
  margin: 12px 0;
}

.stage-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

.stage-individual { background: #e2ecf5; color: #2c5a82; }
.stage-team { background: #e5f0e3; color: #3c6b3a; }
.stage-closed { background: #ece7e1; color: var(--muted); }

.answer-correct { color: var(--good); font-weight: 700; }
.answer-wrong { color: var(--bad); font-weight: 700; }

.result-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
}

.result-row:last-child { border-bottom: none; }

.score-big {
  font-size: 3rem;
  font-weight: 800;
  text-align: center;
  color: var(--accent);
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
  margin-top: 10px;
}

.stat-box {
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
}

.stat-box .num { font-size: 1.4rem; font-weight: 800; color: var(--accent); }
.stat-box .lbl { font-size: 0.75rem; color: var(--muted); text-transform: uppercase; }

.error-msg {
  background: #fbe6e0;
  color: var(--bad);
  padding: 10px 14px;
  border-radius: 6px;
  margin-top: 12px;
  font-size: 0.9rem;
}

.hint {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 4px;
}

a { color: var(--accent); }

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.tabs button {
  margin-top: 0;
  background: white;
  color: var(--ink);
  border: 1px solid var(--line);
}

.tabs button.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 40px;
}