* { box-sizing: border-box; }
body { font-family: system-ui, -apple-system, sans-serif; margin: 0; background: #f4f6f8; color: #1a1a1a; }
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.panel { width: 100%; max-width: 420px; margin: 1rem; padding: 2rem; background: #fff; border-radius: 12px; box-shadow: 0 2px 12px rgba(0,0,0,.08); }
.layout { display: grid; grid-template-columns: 280px 1fr; min-height: 100vh; }
.sidebar { background: #fff; border-right: 1px solid #e5e7eb; padding: 1.25rem; }
.sidebar h2 { margin: 0 0 1rem; font-size: 1.1rem; }
.chat { display: flex; flex-direction: column; padding: 1rem; background: #eef2f7; }
#messages {
  flex: 1;
  overflow-y: auto;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1rem;
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.msg-row { display: flex; max-width: 88%; }
.msg-row.user { align-self: flex-end; }
.msg-row.bot { align-self: flex-start; flex-direction: column; align-items: flex-start; }
.bubble {
  padding: 0.7rem 1rem;
  border-radius: 1.1rem;
  line-height: 1.55;
  font-size: 0.95rem;
  word-break: break-word;
}
.msg-row.user .bubble {
  background: #c7dfff;
  color: #0f3460;
  border-bottom-right-radius: 0.3rem;
}
.msg-row.bot .bubble {
  background: #fff;
  color: #1f2937;
  border: 1px solid #e5e7eb;
  border-bottom-left-radius: 0.3rem;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.bubble.md h2, .bubble.md h3 { margin: 0.6rem 0 0.35rem; font-size: 1rem; }
.bubble.md h3 { font-size: 0.95rem; }
.bubble.md p { margin: 0.35rem 0; }
.bubble.md ul { margin: 0.35rem 0; padding-left: 1.25rem; }
.bubble.md li { margin: 0.15rem 0; }
.bubble.md table { border-collapse: collapse; width: 100%; margin: 0.5rem 0; font-size: 0.85rem; }
.bubble.md th, .bubble.md td { border: 1px solid #e5e7eb; padding: 0.4rem 0.55rem; text-align: left; vertical-align: top; }
.bubble.md th { background: #f3f4f6; font-weight: 600; }
.bubble.md strong { font-weight: 600; }
.confirm-btn { display: block; margin-top: 0.6rem; background: #059669; }
.msg-meta { margin-top: 0.25rem; font-size: 0.72rem; color: #6b7280; }
form label { display: block; margin-bottom: .75rem; font-size: .9rem; }
input { width: 100%; padding: .55rem .65rem; margin-top: .25rem; border: 1px solid #ccc; border-radius: 8px; }
button { padding: .55rem 1.1rem; border: none; border-radius: 8px; background: #2563eb; color: #fff; cursor: pointer; margin-top: .5rem; font-weight: 500; }
button.secondary { background: #6b7280; width: 100%; }
button:disabled { opacity: .6; cursor: not-allowed; }
#chat-form { display: flex; gap: .5rem; background: #fff; padding: .75rem; border-radius: 12px; border: 1px solid #e5e7eb; }
#chat-form button { margin-top: 0; }
#chat-form input { flex: 1; margin-top: 0; }
.error { color: #b00020; font-size: .9rem; }
dl { font-size: .85rem; }
dt { font-weight: 600; margin-top: .5rem; color: #6b7280; }
dd { margin: .15rem 0 0; word-break: break-all; }
.mono { font-family: ui-monospace, monospace; font-size: .75rem; }