:root {
  --bg: #0f1419;
  --panel: #171d24;
  --line: #2a333d;
  --text: #e8eef4;
  --muted: #8b98a5;
  --accent: #3d8bfd;
  --danger: #e85d4c;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; font: 15px/1.5 "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--text); }
.hidden { display: none !important; }
.login { min-height: 100%; display: grid; place-items: center; padding: 24px; }
.card, aside, main { background: var(--panel); border: 1px solid var(--line); }
.card { width: min(420px, 100%); padding: 28px; border-radius: 10px; }
h1, h2, h3 { margin: 0 0 8px; font-weight: 600; }
.muted, .hint { color: var(--muted); font-size: 13px; }
label { display: block; margin: 12px 0; font-size: 13px; color: var(--muted); }
input, textarea, button { width: 100%; padding: 10px 12px; border-radius: 6px; border: 1px solid var(--line); background: var(--bg); color: var(--text); font: inherit; }
textarea { min-height: 90px; }
button { background: var(--accent); border: 0; color: #fff; cursor: pointer; width: auto; }
.err { color: var(--danger); min-height: 1.2em; }
.app { display: grid; grid-template-columns: 220px 1fr; min-height: 100%; }
aside { padding: 18px 14px; border-right: 1px solid var(--line); }
.brand { font-weight: 700; margin-bottom: 10px; }
.who { font-size: 12px; color: var(--muted); margin-bottom: 16px; }
nav button { display: block; width: 100%; text-align: left; background: transparent; color: var(--text); margin-bottom: 6px; }
nav button.active { background: #243044; }
main { padding: 24px 28px; overflow: auto; }
.thread { min-height: 240px; border: 1px solid var(--line); border-radius: 8px; padding: 12px; margin: 12px 0; white-space: pre-wrap; }
.ask, .row { display: flex; gap: 8px; }
.ask input, .row input { flex: 1; }
.hits, .grid { display: grid; gap: 8px; margin: 12px 0; }
.pill { display: inline-block; padding: 4px 8px; border: 1px solid var(--line); border-radius: 999px; font-size: 12px; color: var(--muted); margin-right: 6px; }
.item, .stats { border: 1px solid var(--line); border-radius: 8px; padding: 12px; margin: 8px 0; }
table { width: 100%; border-collapse: collapse; }
th, td { border-bottom: 1px solid var(--line); text-align: left; padding: 8px; font-size: 13px; }
.stack { display: grid; gap: 8px; max-width: 640px; }