:root {
  --bg: #f2efe9;
  --panel: #fffdf8;
  --card: #ffffff;
  --primary: #0d4c8d;
  --primary-2: #1a6bb3;
  --accent: #d95d2a;
  --success: #2f8f5b;
  --wrong: #b63d3d;
  --text: #1f2a37;
  --muted: #5f6d7c;
  --line: #d7d8dd;
  --warning: #f4c95d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: linear-gradient(180deg, #f7f1e7, #e8e2d8);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
}

.app {
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.8rem);
}

.panel {
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px 18px;
  box-shadow: 0 8px 20px rgba(34, 34, 34, 0.06);
}

.overview {
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.label {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.quiz-box {
  margin-top: 10px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px 22px;
  box-shadow: 0 15px 30px rgba(18,22,30,0.06);
}

.category-tag {
  display: inline-block;
  background: var(--primary);
  color: white;
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

h2 {
  margin: 0 0 18px;
  line-height: 1.35;
  font-size: clamp(1.3rem, 2vw, 2rem);
}

.choices {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.choice-btn {
  border: 1px solid var(--line);
  background: #f9f9f9;
  color: var(--text);
  border-radius: 12px;
  padding: 14px 16px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: 0.2s ease;
}

.choice-btn:hover {
  border-color: var(--primary-2);
  transform: translateY(-1px);
}

.choice-btn.selected {
  border-color: var(--primary-2);
  background: rgba(26, 107, 179, 0.08);
}

.choice-btn.correct {
  background: rgba(47, 143, 91, 0.15);
  border-color: var(--success);
  color: #174e30;
}

.choice-btn.wrong {
  background: rgba(182, 61, 61, 0.12);
  border-color: var(--wrong);
  color: #672020;
}

.input-wrap {
  margin-top: 18px;
}

.input-wrap label {
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
}

input {
  width: min(100%, 360px);
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 1rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

button {
  border: none;
  border-radius: 12px;
  padding: 12px 18px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s ease;
}

button.primary {
  background: var(--primary);
  color: white;
}

button.secondary {
  background: #eef3f9;
  color: var(--primary);
}

button.ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
}

button:hover {
  filter: brightness(1.02);
}

.feedback {
  margin-top: 16px;
  padding: 12px 14px;
  border-left: 5px solid var(--primary);
  background: #f4f8ff;
  border-radius: 10px;
  line-height: 1.5;
}

.feedback.success {
  border-left-color: var(--success);
  background: rgba(47, 143, 91, 0.08);
}

.feedback.error {
  border-left-color: var(--wrong);
  background: rgba(182, 61, 61, 0.08);
}

.hidden { display: none !important; }

.summary {
  margin-top: 20px;
}

.summary-list {
  margin: 12px 0 0;
  padding-left: 18px;
  line-height: 1.7;
}

.history-panel {
  margin-top: 20px;
}

.table-wrap {
  overflow-x: auto;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  background: white;
  border-radius: 12px;
  overflow: hidden;
}

.history-table th,
.history-table td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
}

.history-table th {
  background: #edf3fa;
  color: var(--primary);
}

.history-table tbody tr:nth-child(even) {
  background: #fafbfd;
}

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .overview {
    grid-template-columns: 1fr;
  }
}