:root {
  color-scheme: light dark;
  --bg: #fbfaf8;
  --panel: #ffffff;
  --ink: #1b1a19;
  --muted: #6c6a67;
  --line: #e6e2dc;
  --accent: #b3502a;
  --accent-soft: #f6ece6;
  --user: #eef2f7;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14100e;
    --panel: #1d1815;
    --ink: #efe9e3;
    --muted: #a39a91;
    --line: #322a25;
    --accent: #e2794a;
    --accent-soft: #2a1d16;
    --user: #23201d;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0 auto;
  padding: 1.25rem 1rem 2rem;
  max-width: 46rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
}
header { display: flex; align-items: center; gap: 1rem; }
.brand { display: flex; align-items: center; gap: 0.7rem; flex: 1; min-width: 0; }
.dragon { font-size: 2rem; line-height: 1; }
h1 { margin: 0; font-size: 1.15rem; letter-spacing: -0.01em; }
.sub { margin: 0.1rem 0 0; color: var(--muted); font: 12px/1.4 var(--mono); }
button {
  font: inherit; cursor: pointer; border-radius: 8px; border: 1px solid transparent;
  padding: 0.5rem 0.9rem; background: var(--accent); color: #fff;
}
button:disabled { opacity: 0.5; cursor: default; }
.ghost { background: transparent; color: var(--muted); border-color: var(--line); }
.ghost:hover { color: var(--ink); }
#settings[hidden] { display: none; }  /* id selector must beat the UA [hidden] rule */
#settings {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 0.75rem 1rem; padding: 0.9rem 1rem;
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
}
#settings label { display: grid; gap: 0.3rem; font: 12px/1.3 var(--mono); color: var(--muted); }
#settings select, #settings input { font: inherit; accent-color: var(--accent); }
#settings select {
  padding: 0.35rem; border-radius: 6px; border: 1px solid var(--line);
  background: var(--bg); color: var(--ink);
}
#settings button { align-self: end; }
.notice {
  padding: 0.7rem 0.9rem; border-radius: 10px; font-size: 13px;
  background: var(--accent-soft); border: 1px solid var(--line); color: var(--muted);
}
.notice strong { color: var(--ink); }
main {
  flex: 1; display: flex; flex-direction: column; gap: 0.6rem; min-height: 8rem;
}
.msg { padding: 0.65rem 0.85rem; border-radius: 12px; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.user { background: var(--user); align-self: flex-end; max-width: 85%; }
.msg.bot {
  background: var(--panel); border: 1px solid var(--line);
  font-family: var(--mono); font-size: 13.5px;
}
.msg.bot.streaming::after {
  content: "▍"; color: var(--accent); animation: blink 1s steps(2) infinite;
}
.msg.error { background: transparent; border: 1px dashed var(--accent); color: var(--accent); }
@keyframes blink { 50% { opacity: 0; } }
#composer { display: flex; gap: 0.5rem; align-items: flex-end; }
textarea {
  flex: 1; resize: vertical; padding: 0.6rem 0.7rem; border-radius: 10px;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink); font: inherit;
}
footer {
  display: flex; gap: 0.9rem; align-items: center;
  font: 12px/1.4 var(--mono); color: var(--muted);
}
footer .spacer { flex: 1; }
footer a { color: var(--muted); }
footer a:hover { color: var(--accent); }