:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #16181d;
  --muted: #5d6470;
  --line: #e3e6eb;
  --brand: #0b6bcb;
  --brand-ink: #ffffff;
  --ok: #1d7f45;
  --warn: #a15c00;
  --danger: #b42318;
  --bubble-in: #eceff3;
  --bubble-out: #0b6bcb;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --card: #1a1d23;
    --text: #eef0f3;
    --muted: #a0a7b3;
    --line: #2a2f37;
    --brand: #4b9bec;
    --brand-ink: #0b1220;
    --ok: #4cc27f;
    --warn: #f0a63a;
    --danger: #ff6b5e;
    --bubble-in: #262a31;
    --bubble-out: #2f7fd3;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--brand); }
.wrap { max-width: 760px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.5rem; margin: 8px 0 4px; }
h2 { font-size: 1.15rem; margin: 20px 0 8px; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin: 10px 0; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.grow { flex: 1 1 auto; }
button, .btn {
  appearance: none; border: 0; border-radius: 10px; padding: 12px 16px; font: inherit; font-weight: 600;
  background: var(--brand); color: var(--brand-ink); cursor: pointer; text-decoration: none; display: inline-block;
  min-height: 44px;
}
button.secondary, .btn.secondary { background: transparent; color: var(--brand); border: 1px solid var(--line); }
button.danger { background: var(--danger); color: #fff; }
button:disabled { opacity: 0.5; cursor: default; }
input, textarea, select {
  width: 100%; font: inherit; color: var(--text); background: var(--card); border: 1px solid var(--line);
  border-radius: 10px; padding: 11px 12px; min-height: 44px;
}
textarea { min-height: 140px; resize: vertical; }
label { display: block; font-weight: 600; margin: 10px 0 4px; }
.pill { display: inline-block; font-size: 0.78rem; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.pill.ok { color: var(--ok); border-color: var(--ok); }
.pill.warn { color: var(--warn); border-color: var(--warn); }
.pill.danger { color: var(--danger); border-color: var(--danger); }
.tabs { display: flex; gap: 4px; position: sticky; top: 0; background: var(--bg); padding: 8px 0; z-index: 5; overflow-x: auto; }
.tabs button { background: transparent; color: var(--muted); border: 1px solid var(--line); flex: 1 0 auto; }
.tabs button.active { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }
.bubbles { display: flex; flex-direction: column; gap: 6px; }
.bubble { max-width: 82%; padding: 9px 12px; border-radius: 16px; white-space: pre-wrap; word-wrap: break-word; }
.bubble.in { background: var(--bubble-in); align-self: flex-start; border-bottom-left-radius: 4px; }
.bubble.out { background: var(--bubble-out); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.bubble.owner { outline: 2px solid var(--ok); }
.bubble .meta { display: block; font-size: 0.72rem; opacity: 0.75; margin-top: 3px; }
.grid2 { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 760px) { .grid2 { grid-template-columns: 1fr 1fr; } }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.85rem; }
pre { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
.thumbs img { width: 84px; height: 84px; object-fit: cover; border-radius: 8px; margin: 4px 4px 0 0; border: 1px solid var(--line); }
.stat { font-size: 1.6rem; font-weight: 700; }
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
@media (min-width: 600px) { .stats { grid-template-columns: repeat(4, 1fr); } }