:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #656d76;
  --border: #d0d7de;
  --card: #f6f8fa;
  --accent: #0969da;
  --accent-fg: #ffffff;
  --danger: #cf222e;
  --success: #1a7f37;
  --code-bg: #f6f8fa;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #8b949e;
    --border: #30363d;
    --card: #161b22;
    --accent: #58a6ff;
    --accent-fg: #0d1117;
    --danger: #f85149;
    --success: #3fb950;
    --code-bg: #161b22;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 2rem 1rem 4rem;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.55;
}

.app-header,
main,
.app-footer {
  max-width: 900px;
  margin: 0 auto;
}

.app-header {
  margin-bottom: 1.5rem;
}

.app-header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.75rem;
}

.subtitle {
  color: var(--muted);
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
}

.home-link a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
}
.home-link a:hover { text-decoration: underline; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.1rem 1.25rem;
  margin-bottom: 1rem;
}

.card h2 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
}

.status {
  font-size: 0.9rem;
  color: var(--muted);
}
.status.ready { color: var(--success); }
.status.error { color: var(--danger); }

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

.form-row label {
  min-width: 110px;
  color: var(--muted);
  font-size: 0.9rem;
}

.form-row input[type="text"],
.form-row input[type="file"] {
  flex: 1;
  min-width: 180px;
  padding: 0.4rem 0.6rem;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
}

textarea#query {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--code-bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9rem;
  resize: vertical;
}

button {
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  background: var(--accent);
  color: var(--accent-fg);
  border-radius: 6px;
  font-size: 0.9rem;
  cursor: pointer;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
button:hover:not(:disabled) {
  filter: brightness(0.95);
}

#download-csv-btn {
  background: var(--bg);
  color: var(--fg);
}

.actions { justify-content: flex-start; }

.msg { font-size: 0.85rem; color: var(--muted); }
.msg.error { color: var(--danger); }
.msg.success { color: var(--success); }

.table-list ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.table-list li {
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9rem;
}
.table-list li:last-child { border-bottom: none; }
.table-list .tname { font-weight: 600; color: var(--accent); }
.table-list .tcols { color: var(--muted); font-size: 0.85rem; }

.result-table {
  overflow-x: auto;
  margin-top: 0.75rem;
  max-height: 480px;
  overflow-y: auto;
}
.result-table table {
  border-collapse: collapse;
  font-size: 0.88rem;
  width: 100%;
}
.result-table th, .result-table td {
  border: 1px solid var(--border);
  padding: 0.35rem 0.6rem;
  text-align: left;
  vertical-align: top;
  white-space: nowrap;
}
.result-table th {
  background: var(--card);
  position: sticky;
  top: 0;
  z-index: 1;
}
.result-table tr:nth-child(even) td { background: rgba(127, 127, 127, 0.04); }

.app-footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}
.app-footer a {
  color: var(--accent);
  text-decoration: none;
}
.app-footer a:hover { text-decoration: underline; }

details summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}