:root {
  --bg: #0f1115; --card: #181b22; --ink: #e7e9ee; --muted: #9aa2b1;
  --line: #2a2f3a; --accent: #4f8cff; --error: #ff6b6b;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.55 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 20px; border-bottom: 1px solid var(--line);
}
.brand { font-weight: 600; }
.logout { color: var(--muted); text-decoration: none; font-size: 14px; }
.logout:hover { color: var(--ink); }
main { max-width: 820px; margin: 32px auto; padding: 0 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 24px; }
.card.narrow { max-width: 360px; margin: 10vh auto; }
h1 { margin: 0 0 6px; font-size: 22px; }
h2 { font-size: 15px; color: var(--muted); margin: 22px 0 6px; }
.hint { color: var(--muted); margin: 0 0 16px; }
textarea, input, select {
  width: 100%; background: #10131a; color: var(--ink);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; font: inherit;
}
textarea { resize: vertical; }
.filters { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 12px 0; }
button {
  background: var(--accent); color: #fff; border: 0; border-radius: 8px;
  padding: 10px 18px; font: inherit; font-weight: 600; cursor: pointer;
}
button:disabled { opacity: .5; cursor: default; }
form input { margin-bottom: 12px; }
.status { color: var(--muted); margin-top: 16px; min-height: 1em; }
.answer { white-space: pre-wrap; margin-top: 8px; }
.sources ul { margin: 4px 0 0; padding-left: 18px; color: var(--muted); font-size: 14px; word-break: break-all; }
.error { color: var(--error); }