:root {
  --bg: #0f1419;
  --card: #1a2332;
  --text: #e8eef4;
  --muted: #8b9cb3;
  --accent: #14b8a6;
  --border: #2d3a4d;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
}
header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
header h1 { margin: 0; font-size: 1.25rem; }
.tag { margin: 0.25rem 0 0; color: var(--muted); font-size: 0.85rem; }
main { padding: 1rem; max-width: 42rem; margin: 0 auto; }
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 1rem;
}
label { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 0.35rem; }
input[type="text"], input[type="password"] {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}
button {
  margin-top: 0.5rem;
  padding: 0.55rem 1rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #042f2e;
  font-weight: 600;
  cursor: pointer;
}
.meta { font-size: 0.8rem; color: var(--muted); margin: 0.5rem 0 0; }
.plans {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}
.plans li { padding: 0.2rem 0; }
.chat #log {
  min-height: 12rem;
  max-height: 50vh;
  overflow-y: auto;
  margin-bottom: 0.75rem;
}
.bubble {
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  line-height: 1.45;
}
.bubble.user { background: #243044; }
.bubble.bot { background: #122820; border-left: 3px solid var(--accent); }
.bubble.err { background: #3d1f1f; color: #fca5a5; }
#form { display: flex; gap: 0.5rem; }
#form input { flex: 1; margin: 0; }
#form button { margin: 0; flex-shrink: 0; }