:root {
  --bg: #f7f7f8;
  --panel-bg: #ffffff;
  --border: #e2e2e6;
  --text: #1a1a1e;
  --text-muted: #6b6b74;
  --accent: #2f5fd8;
  --accent-contrast: #ffffff;
  --badge-high: #1a7f37;
  --badge-medium: #9a6700;
  --badge-low: #b42318;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.page-header h1 {
  margin: 0 0 4px;
  font-size: 1.75rem;
}

.subheading {
  margin: 0 0 28px;
  color: var(--text-muted);
}

.question-panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 28px;
}

#research-form label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  margin-top: 16px;
}

#research-form label:first-of-type {
  margin-top: 0;
}

#research-form textarea,
#research-form select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}

#research-form textarea {
  resize: vertical;
}

#research-form select {
  max-width: 200px;
}

#research-button {
  margin-top: 20px;
  padding: 12px 24px;
  background: var(--accent);
  color: var(--accent-contrast);
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

#research-button:disabled {
  opacity: 0.6;
  cursor: default;
}

.status-message {
  margin-top: 16px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.95rem;
}

.status-message.info {
  background: #eef2ff;
  color: #33389b;
}

.status-message.error {
  background: #fdecea;
  color: var(--badge-low);
}

.results-disclaimer {
  font-size: 0.85rem;
  color: var(--text-muted);
  background: #fff8e1;
  border: 1px solid #f2e2a8;
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 20px;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.result-card {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.result-card .card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.result-card h3 {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.35;
}

.rank-badge {
  flex-shrink: 0;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 0.8rem;
  font-weight: 700;
}

.meta-line {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.field-block {
  font-size: 0.9rem;
}

.field-block .field-label {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  display: block;
  margin-bottom: 2px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: #eee;
  color: var(--text-muted);
}

.badge.quality-high { background: #e6f4ea; color: var(--badge-high); }
.badge.quality-medium { background: #fff4e0; color: var(--badge-medium); }
.badge.quality-low { background: #fdecea; color: var(--badge-low); }

.card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.card-actions label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
}

.card-actions a {
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.card-actions a:hover {
  text-decoration: underline;
}

.continue-bar {
  margin-top: 24px;
  display: flex;
  justify-content: flex-end;
}

#continue-button {
  padding: 12px 22px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #ececef;
  color: var(--text-muted);
  font-size: 0.95rem;
  cursor: not-allowed;
}

.empty-state {
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
}

@media (max-width: 620px) {
  .page {
    padding: 20px 14px 48px;
  }

  #research-form select {
    max-width: 100%;
  }

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