:root {
  --bg: #0b1220;
  --card: #111a2b;
  --muted: #9eb0d0;
  --text: #e8eefc;
  --ok: #1db954;
  --bad: #ff4d4f;
  --primary: #4f8cff;
  --border: #24314d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(circle at top, #17233d 0%, var(--bg) 45%);
  color: var(--text);
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px;
}

h1, h2, h3, p {
  margin-top: 0;
}

.card {
  background: rgba(17, 26, 43, 0.92);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}

.hidden {
  display: none !important;
}

.btn {
  border: 1px solid var(--border);
  background: #15213a;
  color: var(--text);
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
}

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

.btn:hover {
  filter: brightness(1.05);
}

.actions {
  display: flex;
  gap: 10px;
  margin: 12px 0 16px;
}

.pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 12px 0;
  padding: 10px 12px;
  background: rgba(17, 26, 43, 0.92);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.page-info {
  color: var(--muted);
  text-align: center;
  flex: 1;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.question {
  background: rgba(17, 26, 43, 0.92);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
}

.question h3 {
  margin-bottom: 10px;
}

.stem {
  color: #e6edff;
  margin-bottom: 10px;
  white-space: pre-wrap;
}

.options {
  display: grid;
  gap: 8px;
}

.option {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  background: #101827;
  border: 1px solid #1f2a43;
  border-radius: 8px;
  padding: 8px;
}

.option input {
  margin-top: 2px;
}

.input-text {
  width: 100%;
  border: 1px solid #2b395a;
  border-radius: 8px;
  padding: 10px;
  background: #0f1727;
  color: var(--text);
}

.score-line {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.ok {
  color: var(--ok);
  font-weight: 600;
}

.bad {
  color: var(--bad);
  font-weight: 600;
}

.review-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 10px;
  background: #0f1727;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.answer-line {
  margin: 4px 0;
}