:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --text: #1d1d1b;
  --muted: #6b6a66;
  --border: #dddbd5;
  --accent: #1f5f8b;
  --accent-text: #ffffff;
  --user-bg: #e4eef6;
  --error: #b42318;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161716;
    --surface: #212321;
    --text: #ecebe7;
    --muted: #a19f99;
    --border: #3a3c3a;
    --accent: #6cb0e0;
    --accent-text: #0e1a24;
    --user-bg: #1f3242;
    --error: #f97066;
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

button { font: inherit; cursor: pointer; }

.top {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.top-inner, .docs-inner, .log > *, .ask {
  width: 100%;
  max-width: 760px;
  margin-inline: auto;
}
.top-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
}
h1 { font-size: 1.15rem; margin: 0; margin-right: auto; }

.toggle { display: flex; align-items: center; gap: 6px; font-size: .95rem; color: var(--muted); }

.ghost {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: .95rem;
}
.ghost:hover { border-color: var(--accent); }

.docs { background: var(--surface); border-bottom: 1px solid var(--border); }
.docs-inner { padding: 8px 16px 16px; }
.docs ul { margin: 8px 0 12px; padding-left: 20px; }
.google { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-bottom: 8px; }
.google:empty { display: none; }
.connect {
  background: var(--accent);
  color: var(--accent-text);
  border-radius: 8px;
  padding: 6px 14px;
  text-decoration: none;
  font-weight: 600;
}
.muted { color: var(--muted); font-size: .95rem; margin: 0; }
.err { color: var(--error); }

.log {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}
.intro { color: var(--muted); padding: 24px 0; }
.examples { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.example {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: .95rem;
}

.msg { margin: 0 auto 16px; }
.msg.user {
  background: var(--user-bg);
  border-radius: 14px;
  padding: 10px 14px;
  width: fit-content;
  max-width: min(85%, 760px);
  margin-right: max(0px, calc((100% - 760px) / 2));
  white-space: pre-wrap;
}
.msg.bot {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 16px;
}
.msg.bot p { margin: 0 0 .6em; }
.msg.bot ul { margin: 0 0 .6em; padding-left: 1.2em; }
.msg.bot > .body > :last-child { margin-bottom: 0; }
.msg.bot.pending .body::after { content: "…"; color: var(--muted); }
.speak {
  margin-top: 8px;
  background: none;
  border: none;
  color: var(--accent);
  padding: 0;
  font-size: .95rem;
}

.ask {
  display: flex;
  gap: 8px;
  padding: 12px 16px 16px;
}
.ask textarea {
  flex: 1;
  resize: none;
  font: inherit;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  max-height: 40vh;
}
.ask button {
  background: var(--accent);
  color: var(--accent-text);
  border: none;
  border-radius: 10px;
  padding: 0 18px;
  font-weight: 600;
}
.ask button:disabled { opacity: .5; cursor: default; }

@media (max-width: 520px) {
  .toggle span { font-size: .85rem; }
  h1 { font-size: 1rem; }
  .top-inner { gap: 10px; }
}