:root {
  --primary: #1B4D6C;
  --primary-light: #2a7ba0;
  --accent: #F47920;
  --bg: #f5f7fa;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --green: #10b981;
  --red: #ef4444;
  --orange: #f59e0b;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.container {
  max-width: 640px;
  width: 100%;
  padding: 1rem;
}

/* Header */
.header {
  text-align: center;
  padding: 1.5rem 0 1rem;
}

.header h1 {
  font-size: 1.4rem;
  color: var(--primary);
  font-weight: 700;
}

.header .subtitle {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 0.25rem;
}

/* Progress bar */
.progress-container { margin: 0.75rem 0; }

.progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.3s ease;
  border-radius: 3px;
}

.progress-text {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 0.3rem;
}

.progress-global {
  color: var(--text-light);
  font-size: 0.75rem;
}

/* Card */
.card {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  padding: 2rem;
  margin: 1rem 0;
  min-height: 220px;
  display: flex;
  flex-direction: column;
}

.card-domain {
  font-size: 0.75rem;
  color: var(--primary-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.75rem;
}

.card-question {
  font-size: 1.1rem;
  line-height: 1.6;
  flex: 1;
}

.card-answer {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--primary);
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-top: 1rem;
  display: none;
}

.card-answer.visible { display: block; }

/* Rating buttons */
.rating-section {
  text-align: center;
  margin: 1rem 0;
  display: none;
}

.rating-section.visible { display: block; }

.rating-label {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 0.75rem;
}

.rating-buttons {
  display: flex;
  gap: 0.4rem;
  justify-content: center;
  flex-wrap: wrap;
}

.rating-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--card-bg);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--text);
}

.rating-btn:hover { transform: scale(1.1); }

.rating-btn[data-rating="0"]:hover,
.rating-btn[data-rating="1"]:hover { border-color: var(--red); color: var(--red); }

.rating-btn[data-rating="2"]:hover,
.rating-btn[data-rating="3"]:hover { border-color: var(--orange); color: var(--orange); }

.rating-btn[data-rating="4"]:hover,
.rating-btn[data-rating="5"]:hover { border-color: var(--green); color: var(--green); }

.rating-btn.selected[data-rating="0"],
.rating-btn.selected[data-rating="1"] { background: var(--red); color: #fff; border-color: var(--red); }

.rating-btn.selected[data-rating="2"],
.rating-btn.selected[data-rating="3"] { background: var(--orange); color: #fff; border-color: var(--orange); }

.rating-btn.selected[data-rating="4"],
.rating-btn.selected[data-rating="5"] { background: var(--green); color: #fff; border-color: var(--green); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  border: none;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); }

.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { opacity: 0.9; }

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover { background: var(--primary); color: #fff; }

/* Reveal */
.reveal-section {
  text-align: center;
  margin: 0.5rem 0;
}

/* Summary */
.summary { display: none; }

.summary.visible { display: block; }

.summary-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1rem 0;
}

.stat-box {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
  box-shadow: 0 1px 6px rgba(0,0,0,0.04);
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
}

.stat-value.green { color: var(--green); }
.stat-value.red { color: var(--red); }
.stat-value.orange { color: var(--orange); }

.stat-label {
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: 0.2rem;
}

.summary-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin: 1.5rem 0;
}

/* ── Batch Config ── */

.batch-config {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.5rem 0 0.75rem;
  flex-wrap: wrap;
}

.batch-label {
  font-size: 0.85rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.batch-select {
  padding: 0.3rem 0.6rem;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
  background: var(--card-bg);
  color: var(--text);
  cursor: pointer;
  outline: none;
}

.batch-select:focus {
  border-color: var(--primary);
}

.batch-hint {
  font-size: 0.7rem;
  color: var(--text-light);
  opacity: 0.7;
}

/* ── Batch Complete ── */

.domain-breakdown {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin: 0.75rem 0;
  padding: 0.5rem;
}

.domain-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.6rem;
  border-radius: 12px;
  background: var(--bg);
  font-size: 0.75rem;
  color: var(--text);
}

.domain-forgotten {
  color: var(--red);
  font-weight: 600;
}

.recommendation {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
  margin: 0.5rem 0 0;
  padding: 0.5rem;
  font-style: italic;
}

.batch-actions {
  flex-wrap: wrap;
}

.batch-actions .btn {
  min-width: 100px;
  justify-content: center;
}

.sync-section {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: center;
  margin: 0.75rem 0 0;
}

.sync-status {
  font-size: 0.75rem;
  color: var(--text-light);
}

/* ── Domain badge ── */
.domain-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.domain-crawler { background: #dbeafe; color: #1e40af; }
.domain-data-analysis { background: #fce7f3; color: #9d174d; }
.domain-programming { background: #d1fae5; color: #065f46; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-light);
}

.empty-state .emoji { font-size: 3rem; margin-bottom: 1rem; }

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-size: 0.85rem;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 100;
}

.toast.visible { opacity: 1; }

/* Loading */
.loading {
  text-align: center;
  padding: 3rem;
  color: var(--text-light);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 0.75rem;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Responsive */
@media (max-width: 480px) {
  .container { padding: 0.75rem; }
  .card { padding: 1.25rem; min-height: 180px; }
  .card-question { font-size: 1rem; }
  .rating-btn { width: 38px; height: 38px; font-size: 0.85rem; }
  .summary-stats { grid-template-columns: repeat(3, 1fr); gap: 0.5rem; }
  .header h1 { font-size: 1.2rem; }
  .batch-config { flex-direction: column; align-items: flex-start; }
  .batch-hint { display: none; }
}