:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1b1f1e;
  --fg-muted: #5b6461;
  --line: #e4e1da;
  --accent: #0f766e;
  --accent-ink: #ffffff;
  --accent-soft: #e3f2ef;
  --warn: #9a5b00;
  --warn-soft: #fdf3e2;
  --radius: 14px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans Devanagari",
    "Noto Sans Bengali", "Noto Sans Tamil", "Noto Sans Telugu", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111413;
    --surface: #1a1e1d;
    --ink: #e8ebe9;
    --fg-muted: #9aa4a0;
    --line: #2c3230;
    --accent: #3cc2b1;
    --accent-ink: #0b1312;
    --accent-soft: #16302c;
    --warn: #f0b35a;
    --warn-soft: #2e2415;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100dvh; display: flex; flex-direction: column;
  background: var(--bg); color: var(--ink); font: 16px/1.6 var(--font);
}
a { color: var(--accent); }
button, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; max-width: 760px; width: 100%; margin: 0 auto;
}
.brand { display: flex; gap: 8px; align-items: center; font-weight: 700; font-size: 18px;
  text-decoration: none; color: var(--ink); letter-spacing: -0.01em; }
.ghost { background: none; border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 14px; cursor: pointer; }
.ghost:hover { border-color: var(--accent); }
.small { font-size: 14px; padding: 4px 12px; }

main { flex: 1; width: 100%; max-width: 760px; margin: 0 auto; padding: 0 16px 24px; }

.hero { padding: 12vh 0 28px; }
.hero h1 { font-size: clamp(28px, 6vw, 42px); line-height: 1.15; margin: 0 0 12px; letter-spacing: -0.02em; }
.hero h1 span { color: var(--accent); display: block; }
.lede { color: var(--fg-muted); margin: 0; max-width: 34em; }
body.active .hero { display: none; }

.ask {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 12px 8px 16px; box-shadow: 0 1px 2px rgb(0 0 0 / 0.04);
}
body.active .ask { position: sticky; bottom: 12px; box-shadow: 0 6px 24px rgb(0 0 0 / 0.1); }
.ask:focus-within { border-color: var(--accent); }
.ask textarea {
  width: 100%; border: 0; outline: 0; resize: none; background: transparent;
  font-size: 17px; max-height: 40vh; padding: 4px 0;
}
.ask-row { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.lang select {
  border: 1px solid var(--line); background: var(--bg); border-radius: 999px;
  padding: 4px 10px; font-size: 14px; color: var(--fg-muted);
}
.go {
  width: 40px; height: 40px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--accent); color: var(--accent-ink); display: grid; place-items: center;
}
.go:disabled { opacity: 0.4; cursor: default; }

.thread { display: flex; flex-direction: column; gap: 28px; padding: 8px 0 20px; }
.turn h2 { font-size: 22px; line-height: 1.3; margin: 0 0 6px; letter-spacing: -0.01em; }
.searched { font-size: 13px; color: var(--fg-muted); margin: 0 0 12px; }
.searched q { font-style: normal; }

.sources { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 14px;
  scrollbar-width: thin; }
.card {
  flex: 0 0 180px; background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; padding: 8px 10px; text-decoration: none; color: var(--ink);
  font-size: 13px; line-height: 1.35; display: flex; flex-direction: column; gap: 4px;
}
.card:hover, .card.hl { border-color: var(--accent); }
.card .t { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card .h { color: var(--fg-muted); font-size: 12px; display: flex; gap: 6px; align-items: center; }
.num { display: inline-grid; place-items: center; min-width: 18px; height: 18px; border-radius: 5px;
  background: var(--accent-soft); color: var(--accent); font-size: 11px; font-weight: 700; padding: 0 4px; }

.answer { font-size: 16.5px; }
.answer p { margin: 0 0 12px; }
.answer ul, .answer ol { margin: 0 0 12px; padding-left: 22px; }
.answer li { margin-bottom: 4px; }
.answer .flag { background: var(--warn-soft); border-radius: 4px; }
.cursor::after { content: "▍"; color: var(--accent); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.status { color: var(--fg-muted); font-size: 14px; display: flex; gap: 8px; align-items: center; }
.dots::after { content: "…"; animation: blink 1.2s steps(1) infinite; }
.note { font-size: 13.5px; border-radius: 10px; padding: 10px 12px; margin-top: 4px; }
.note.ok { background: var(--accent-soft); color: var(--ink); }
.note.warn { background: var(--warn-soft); color: var(--ink); border-left: 3px solid var(--warn); }
.note.err { background: var(--warn-soft); }


.foot { max-width: 760px; width: 100%; margin: 0 auto; padding: 16px 16px 28px;
  color: var(--fg-muted); font-size: 13px; }
.foot p { margin: 4px 0 0; }
.toggle { display: inline-flex; gap: 8px; align-items: center; cursor: pointer; color: var(--ink); font-size: 14px; }
.toggle input { accent-color: var(--accent); width: 16px; height: 16px; }

/* ---- search modes, starters ---- */
.bar-actions { display: flex; gap: 8px; }
.ask-row { flex-wrap: wrap; row-gap: 8px; }
.ask-end { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.modes { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; max-width: 100%; }
.modes::-webkit-scrollbar { display: none; }
.modes button {
  border: 1px solid transparent; background: none; border-radius: 999px; padding: 4px 11px;
  font-size: 14px; color: var(--fg-muted); cursor: pointer; white-space: nowrap;
}
.modes button:hover { color: var(--ink); }
.modes button[aria-checked="true"] { background: var(--accent-soft); color: var(--accent); border-color: transparent; font-weight: 600; }
.starters { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 8px; margin-top: 16px; }
.starters button {
  text-align: left; background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 10px 12px; cursor: pointer; font-size: 14px; color: var(--ink); line-height: 1.4;
}
.starters button:hover { border-color: var(--accent); }
body.active .starters { display: none; }

/* ---- sources ---- */
.card { flex-basis: 190px; }
.card .h { display: flex; align-items: center; gap: 6px; color: var(--fg-muted); font-size: 12px; min-width: 0; }
.card .h .d { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card .f { display: flex; align-items: center; gap: 6px; margin-top: auto; }
.card .k, .tip .k { font-size: 11px; color: var(--fg-muted); }
.fav { width: 16px; height: 16px; border-radius: 4px; flex: none; object-fit: contain; }
.fav.letter { display: inline-grid; place-items: center; background: var(--accent-soft); color: var(--accent);
  font-size: 10px; font-weight: 700; }

/* ---- answer ---- */
.answer h3 { font-size: 17px; margin: 18px 0 8px; }
.answer code { background: var(--accent-soft); border-radius: 4px; padding: 1px 5px; font-size: 0.9em; }
.answer .code { position: relative; margin: 0 0 12px; }
.answer pre { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 12px;
  overflow-x: auto; font-size: 14px; margin: 0; }
.answer pre code { background: none; padding: 0; }
.copy-code { position: absolute; top: 6px; right: 6px; font-size: 12px; border: 1px solid var(--line);
  background: var(--bg); border-radius: 6px; padding: 2px 8px; cursor: pointer; }
.cite {
  display: inline-grid; place-items: center; min-width: 18px; height: 18px; padding: 0 4px; margin: 0 1px;
  border-radius: 5px; background: var(--accent-soft); color: var(--accent); font-size: 11px; font-weight: 700;
  text-decoration: none; vertical-align: 2px; line-height: 1;
}
.cite:hover, .cite:focus-visible { background: var(--accent); color: var(--accent-ink); outline: none; }

.skeleton { display: grid; gap: 10px; margin: 6px 0 16px; }
.skeleton span { height: 12px; border-radius: 6px; background: linear-gradient(90deg, var(--line), var(--surface), var(--line));
  background-size: 200% 100%; animation: shimmer 1.3s linear infinite; }
.skeleton span:nth-child(2) { width: 92%; }
.skeleton span:nth-child(3) { width: 64%; }
@keyframes shimmer { to { background-position: -200% 0; } }

.tools { display: flex; gap: 8px; margin: 10px 0 0; }
.related { margin-top: 18px; display: flex; flex-direction: column; align-items: flex-start; gap: 6px; }
.related h4 { margin: 0 0 2px; font-size: 13px; color: var(--fg-muted); font-weight: 600; }
.pill { background: none; border: 0; border-top: 1px solid var(--line); padding: 8px 0; width: 100%;
  text-align: left; cursor: pointer; color: var(--ink); font-size: 15px; }
.pill::before { content: "↳ "; color: var(--accent); }
.pill:hover { color: var(--accent); }

.tip { position: absolute; z-index: 20; background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 10px 12px; box-shadow: 0 8px 28px rgb(0 0 0 / 0.14); font-size: 13.5px; line-height: 1.45; }
.tip-h { display: flex; gap: 6px; align-items: center; color: var(--fg-muted); font-size: 12px; margin-bottom: 4px; }
.tip strong { display: block; margin-bottom: 4px; }
.tip p { margin: 0; color: var(--fg-muted); }

/* ---- history drawer ---- */
.drawer { position: fixed; inset: 0 0 0 auto; width: min(360px, 100%); background: var(--surface); z-index: 30;
  border-left: 1px solid var(--line); box-shadow: -12px 0 32px rgb(0 0 0 / 0.12); padding: 16px; overflow-y: auto; }
.drawer-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.drawer h2 { font-size: 16px; margin: 0; }
.drawer h2 small { color: var(--fg-muted); font-weight: 400; font-size: 12px; }
.drawer ul { list-style: none; margin: 0 0 12px; padding: 0; }
.drawer li button { width: 100%; text-align: left; background: none; border: 0; border-bottom: 1px solid var(--line);
  padding: 10px 0; cursor: pointer; display: flex; justify-content: space-between; gap: 8px; color: var(--ink); }
.drawer li button small { color: var(--fg-muted); flex: none; }
.drawer li.empty { color: var(--fg-muted); padding: 8px 0; }
.danger { color: var(--warn); }

/* ---- voice ---- */
.mic { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--line); background: var(--bg);
  color: var(--fg-muted); display: grid; place-items: center; cursor: pointer; }
.mic:hover { color: var(--accent); border-color: var(--accent); }
.mic.on { background: #d93025; border-color: #d93025; color: #fff; animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 6px rgb(217 48 37 / 0.2); } }

/* ---- photo attachment ---- */
label.mic { cursor: pointer; }
.attached { display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: var(--accent-soft); border-radius: 8px; padding: 6px 10px; font-size: 13.5px; margin-bottom: 6px; }
.chip-x { border: 0; background: none; cursor: pointer; color: var(--fg-muted); font-size: 14px; }
span.cite { cursor: default; }