:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --ink: #0e1116;
  --ink-2: #4a5361;
  --ink-3: #7b8494;
  --line: #e3e6eb;
  --accent: #1f6feb;
  --accent-ink: #ffffff;
  --accent-soft: #e8f0fe;
  --ok: #1a7f37;
  --warn: #9a6700;
  --hero-bg: #0e1116;
  --hero-ink: #f6f7f9;
  --hero-dim: #9aa4b2;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0d11;
    --surface: #14181e;
    --ink: #e8ebf0;
    --ink-2: #b4bcc8;
    --ink-3: #848d9b;
    --line: #262c35;
    --accent: #4c8dff;
    --accent-ink: #0b0d11;
    --accent-soft: #15233a;
    --ok: #3fb950;
    --warn: #d29922;
    --hero-bg: #050608;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b0d11; --surface: #14181e; --ink: #e8ebf0; --ink-2: #b4bcc8; --ink-3: #848d9b; --line: #262c35;
  --accent: #4c8dff; --accent-ink: #0b0d11; --accent-soft: #15233a; --ok: #3fb950; --warn: #d29922; --hero-bg: #050608;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

.hero { background: var(--hero-bg); color: var(--hero-ink); padding: 28px 0 36px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .02em; }
.brand em { font-style: normal; font-weight: 500; color: var(--hero-dim); font-size: 14px; }
.hero h1 { font-size: clamp(28px, 7vw, 40px); line-height: 1.25; margin: 28px 0 14px; letter-spacing: -.01em; }
.lede { color: var(--hero-dim); margin: 0; max-width: 34em; }
.lede b { color: var(--hero-ink); font-weight: 600; }

.section-title { font-size: 15px; color: var(--ink-3); font-weight: 600; margin: 28px 0 12px; letter-spacing: .04em; }

.list { display: grid; gap: 12px; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
  display: grid;
  gap: 8px;
}
.card.focused { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.card .meta { display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: center; font-size: 13px; color: var(--ink-3); }
.badge { display: inline-block; background: var(--accent-soft); color: var(--accent); font-weight: 600; font-size: 12px; padding: 2px 8px; border-radius: 999px; }
.card h3 { margin: 0; font-size: 19px; line-height: 1.4; }
.card .role { font-size: 14px; color: var(--ink-2); font-weight: 500; }
.card p { margin: 0; color: var(--ink-2); font-size: 15px; }
.card .actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 6px; }
.card .hint { font-size: 13px; color: var(--ink-3); }

button {
  font: inherit;
  border: 0;
  border-radius: 10px;
  padding: 10px 18px;
  cursor: pointer;
  min-height: 44px;
}
.primary { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.primary:disabled { opacity: .55; cursor: default; }
.ghost { background: transparent; color: var(--ink-2); border: 1px solid var(--line); }

.focus { margin-top: 20px; }
.focus .from { font-size: 13px; color: var(--ink-3); margin: 0 0 8px; }

.session {
  margin-top: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--ok);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  justify-content: space-between;
}
.session .left { display: grid; gap: 2px; }
.session .label { font-size: 13px; color: var(--ink-3); }
.session .title { font-weight: 600; }
.session .clock { font-variant-numeric: tabular-nums; font-weight: 700; font-size: 20px; }
.session .clock.low { color: var(--warn); }
.session .row { display: flex; gap: 8px; }

.fine { color: var(--ink-3); font-size: 13px; margin: 24px 0 8px; }
.foot { padding: 12px 16px 36px; }
.foot a { color: var(--ink-3); font-size: 13px; text-decoration: none; }

dialog {
  border: 0;
  border-radius: var(--radius);
  padding: 0;
  width: min(420px, calc(100vw - 32px));
  background: var(--surface);
  color: var(--ink);
}
dialog::backdrop { background: rgba(0, 0, 0, .45); }
dialog form { padding: 20px; display: grid; gap: 12px; }
dialog h3 { margin: 0; }
dialog p { margin: 0; color: var(--ink-2); font-size: 14px; }
dialog input {
  font: inherit;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  width: 100%;
}
dialog .row { display: flex; justify-content: flex-end; gap: 8px; }
.error { color: #cf222e; }

.busy { position: fixed; inset: 0; background: rgba(0, 0, 0, .5); display: grid; place-items: center; padding: 16px; z-index: 10; }
.busy[hidden] { display: none; }
.busy-card { background: var(--surface); border-radius: var(--radius); padding: 24px 22px; text-align: center; max-width: 340px; }
.busy-card p { margin: 10px 0 0; }
.busy-sub { color: var(--ink-3); font-size: 14px; }
.spinner { width: 34px; height: 34px; border-radius: 50%; border: 3px solid var(--line); border-top-color: var(--accent); margin: 0 auto; animation: spin .9s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation: none; } }