:root {
  --bg: #f7f5f2;
  --panel: #ffffff;
  --ink: #1c1b1a;
  --muted: #6b6560;
  --accent: #b0413e;
  --accent-ink: #ffffff;
  --border: #e3ddd4;
  --cell: #d8d2c8;
  --cell-ink: #f7f5f2;
  --good: #2f6f4f;
  --bad: #b0413e;
  --code-bg: #1c1b1a;
  --code-ink: #f0e9df;
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

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

header.page-head {
  text-align: center;
  margin-bottom: 2rem;
}

header.page-head h1 {
  font-size: 2rem;
  margin: 0 0 0.4rem;
}

header.page-head p {
  color: var(--muted);
  margin: 0.2rem 0;
}

.back-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  text-decoration: none;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  display: block;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.08);
}

.card.locked {
  opacity: 0.55;
  pointer-events: none;
}

.card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.tag {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--border);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
  margin-bottom: 0.6rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.5rem;
  margin: 1.5rem 0;
}

.cell {
  background: var(--cell);
  color: var(--cell-ink);
  border: none;
  border-radius: 6px;
  aspect-ratio: 1 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.1s ease;
}

.cell:hover:not(:disabled) { background: #c5beb2; }

.cell:disabled {
  background: var(--panel);
  color: var(--ink);
  cursor: default;
  border: 1px solid var(--border);
}

.cell .value {
  font-size: 1.1rem;
  font-weight: 700;
}

.cell.checked { border: 2px solid var(--accent); }

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  justify-content: center;
  margin: 1rem 0;
}

button.btn {
  font: inherit;
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1.1rem;
  cursor: pointer;
}

button.btn.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

button.btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.score-row {
  display: flex;
  justify-content: center;
  gap: 2rem;
  text-align: center;
  margin: 1rem 0;
}

.score-row .num {
  font-size: 1.8rem;
  font-weight: 700;
  display: block;
}

.score-row .label {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.result-banner {
  text-align: center;
  font-weight: 600;
  padding: 0.75rem;
  border-radius: 8px;
  margin: 1rem 0;
}

.result-banner.correct { background: #e4f0e9; color: var(--good); }
.result-banner.wrong { background: #f6e4e3; color: var(--bad); }

.code-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

@media (max-width: 640px) {
  .code-compare { grid-template-columns: 1fr; }
  .grid { grid-template-columns: repeat(5, 1fr); }
}

.code-block h4 {
  margin: 0 0 0.4rem;
  font-size: 0.95rem;
}

.code-block .complexity {
  color: var(--muted);
  font-size: 0.8rem;
  margin: 0.2rem 0 0.5rem;
}

pre {
  background: var(--code-bg);
  color: var(--code-ink);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  margin: 0;
}

hr.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

.steps-list {
  padding-left: 1.2rem;
  margin: 0.5rem 0;
}

.steps-list li { margin-bottom: 0.7rem; }

.candidate-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2rem 1.5rem;
  text-align: center;
  max-width: 420px;
  margin: 1.5rem auto;
}

.candidate-card .name {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.candidate-card .bio {
  color: var(--muted);
  margin-bottom: 1.25rem;
  min-height: 2.6em;
}

.candidate-card .score-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.candidate-card .score {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.1;
}

.date-counter {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

.history-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin: 1rem 0 1.5rem;
}

.history-chip {
  background: var(--cell);
  color: var(--cell-ink);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 600;
}

.history-chip.best-so-far {
  background: var(--accent);
  color: var(--accent-ink);
}

.results-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.results-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.55rem 0.9rem;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  font-size: 0.95rem;
}

.results-row.chosen {
  border-color: var(--accent);
  background: #f6e9e8;
  font-weight: 700;
}

.results-row .row-name { text-align: left; }
.results-row .row-score { font-weight: 700; }

.lock-panel {
  text-align: center;
}

.lock-panel .lock-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

input.password-input {
  font: inherit;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  max-width: 200px;
  text-align: center;
}

.lock-error {
  color: var(--bad);
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

footer.site-foot {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 3rem;
}