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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #fefce8;
  color: #1c1917;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
  padding: 28px 20px 20px;
  text-align: center;
  color: #78350f;
}
header h1 {
  font-size: 1.8em;
  font-weight: 800;
  letter-spacing: -0.5px;
}
header .subtitle {
  font-size: 0.9em;
  margin-top: 6px;
  opacity: 0.8;
}

/* Input */
.ask {
  max-width: 680px;
  margin: 24px auto 0;
  padding: 0 16px;
}
.ask form {
  display: flex;
  gap: 8px;
}
.ask input {
  flex: 1;
  padding: 14px 18px;
  border: 2px solid #d6d3d1;
  border-radius: 12px;
  font-size: 1em;
  background: #fff;
  transition: border-color 0.2s;
  outline: none;
}
.ask input:focus {
  border-color: #f59e0b;
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
}
.ask button {
  padding: 14px 24px;
  background: #d97706;
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 1em;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}
.ask button:hover { background: #b45309; }
.ask button:disabled { opacity: 0.5; cursor: wait; }

.examples {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  font-size: 0.82em;
  color: #78716c;
}
.examples .ex {
  background: #fff;
  border: 1px solid #e7e5e4;
  padding: 5px 12px;
  border-radius: 20px;
  cursor: pointer;
  color: #44403c;
  transition: all 0.2s;
}
.examples .ex:hover {
  border-color: #f59e0b;
  background: #fffbeb;
}

/* Mode Tabs */
.mode-tabs {
  max-width: 680px;
  margin: 16px auto 0;
  padding: 0 16px;
  display: flex;
  gap: 4px;
}
.mode-btn {
  padding: 8px 18px;
  border: 1px solid #d6d3d1;
  background: #fff;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
  font-size: 0.85em;
  color: #78716c;
  transition: all 0.2s;
}
.mode-btn.active {
  background: #fffbeb;
  border-color: #f59e0b;
  color: #78350f;
  font-weight: 600;
}
.mode-btn:hover:not(.active) { background: #f5f5f4; }

/* Results */
.results {
  max-width: 680px;
  margin: 0 auto 20px;
  padding: 0 16px;
  width: 100%;
  flex: 1;
}
.empty {
  text-align: center;
  padding: 40px 20px;
  color: #78716c;
}
.empty .small {
  font-size: 0.85em;
  margin-top: 8px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* QA Answer Card */
.answer-card {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  margin-top: 12px;
  border: 1px solid #e7e5e4;
  line-height: 1.7;
}
.answer-card h2, .answer-card h3 {
  color: #78350f;
  margin-top: 16px;
  margin-bottom: 8px;
}
.answer-card h2 { font-size: 1.2em; }
.answer-card h3 { font-size: 1.05em; }
.answer-card p { margin: 8px 0; }
.answer-card ul, .answer-card ol { padding-left: 24px; margin: 8px 0; }
.answer-card a { color: #d97706; }
.answer-card a:hover { color: #b45309; }
.answer-card strong { color: #292524; }
.answer-card code {
  background: #fef3c7;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}
.answer-card .elapsed {
  font-size: 0.75em;
  color: #a8a29e;
  text-align: right;
  margin-top: 12px;
}

/* Search Results Card */
.search-card {
  background: #fff;
  border-radius: 12px;
  border: 1px solid #e7e5e4;
  overflow: hidden;
  margin-top: 12px;
}
.search-item {
  padding: 14px 18px;
  border-bottom: 1px solid #f5f5f4;
  cursor: pointer;
  transition: background 0.15s;
}
.search-item:last-child { border-bottom: none; }
.search-item:hover { background: #fffbeb; }
.search-item .title {
  font-weight: 600;
  color: #78350f;
  font-size: 0.95em;
}
.search-item .meta {
  font-size: 0.78em;
  color: #a8a29e;
  margin-top: 3px;
}
.search-item .meta .cat {
  display: inline-block;
  background: #fef3c7;
  padding: 1px 8px;
  border-radius: 4px;
  color: #92400e;
}
.search-item .snippet {
  font-size: 0.85em;
  color: #57534e;
  margin-top: 4px;
  line-height: 1.5;
}

/* Sources */
.sources {
  max-width: 680px;
  margin: 0 auto 12px;
  padding: 0 16px;
  font-size: 0.82em;
  color: #78716c;
}
.sources details {
  background: #fff;
  border: 1px solid #e7e5e4;
  border-radius: 8px;
  padding: 10px 14px;
}
.sources summary {
  cursor: pointer;
  font-weight: 600;
  color: #57534e;
}
.sources ul {
  list-style: none;
  padding: 0;
  margin-top: 8px;
}
.sources li {
  padding: 4px 0;
}
.sources a { color: #d97706; }
.sources a:hover { color: #b45309; }

/* Error */
.error-message {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 12px;
  padding: 16px 20px;
  color: #991b1b;
  margin-top: 12px;
}

/* Footer */
footer {
  text-align: center;
  padding: 20px;
  color: #a8a29e;
  font-size: 0.8em;
}
footer a { color: #d97706; }

/* Loading */
.loading {
  text-align: center;
  padding: 30px;
  color: #78716c;
}
.spinner {
  display: inline-block;
  width: 28px; height: 28px;
  border: 3px solid #e7e5e4;
  border-top-color: #d97706;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Responsive */
@media (max-width: 600px) {
  header h1 { font-size: 1.3em; }
  .ask form { flex-direction: column; }
  .ask button { width: 100%; }
  .examples { font-size: 0.78em; }
  .answer-card { padding: 16px; }
}