:root {
  --bg: #f4f6fa;
  --card: #ffffff;
  --text: #1c2433;
  --muted: #6b7587;
  --line: #e3e7ee;
  --primary: #3b6cf6;
  --danger: #d93a4a;
  --danger-bg: #fdecee;
  --ok: #1f9d55;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151c;
    --card: #1a2029;
    --text: #e6e9ef;
    --muted: #97a0b0;
    --line: #2a3140;
    --primary: #6b8fff;
    --danger: #ff6b78;
    --danger-bg: #3a1e24;
    --ok: #45c47a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}

a { color: var(--primary); text-decoration: none; }
h1 { font-size: 1.4rem; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.05rem; margin: 1.5rem 0 0.5rem; }
h3 { font-size: 0.95rem; margin: 1rem 0 0.25rem; }
code { font-size: 0.9em; }

.wrap { max-width: 960px; margin: 0 auto; padding: 1rem; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.right { text-align: right; margin-top: 0.75rem; }

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.25rem 1rem;
  padding: 0.5rem 1rem;
  background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; color: var(--text); }
.nav { display: flex; gap: 0.25rem; overflow-x: auto; flex: 1; }
.nav a { padding: 0.35rem 0.6rem; border-radius: 8px; color: var(--muted); white-space: nowrap; }
.nav a.on { background: var(--bg); color: var(--text); font-weight: 600; }
.logout { margin-left: auto; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem; margin-bottom: 1rem;
}
.notice { background: var(--card); border-left: 4px solid var(--primary); padding: 0.6rem 1rem; border-radius: 8px; margin-bottom: 1rem; }
.error { background: var(--danger-bg); color: var(--danger); padding: 0.6rem 0.8rem; border-radius: 8px; margin-bottom: 0.75rem; }
.hint ol { margin: 0.5rem 0 0; }

input, select, textarea, button {
  font: inherit; color: inherit;
  border: 1px solid var(--line); border-radius: 8px;
  background: var(--card); padding: 0.45rem 0.65rem;
}
textarea { width: 100%; font-family: ui-monospace, Consolas, monospace; font-size: 0.9rem; }
button { cursor: pointer; }
button.primary, .button.primary { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 600; }
.button { display: inline-block; padding: 0.45rem 0.9rem; border-radius: 8px; }
button.danger { color: var(--danger); }
button.link { border: 0; background: none; color: var(--muted); padding: 0.25rem; }

.stack { display: flex; flex-direction: column; gap: 0.75rem; }
.stack label { display: flex; flex-direction: column; gap: 0.3rem; }
label.check { flex-direction: row; align-items: center; gap: 0.5rem; }
label.app-check { align-items: flex-start; padding: 0.35rem 0; }
label.app-check input { margin-top: 0.25rem; }
.block { display: block; }
.inline { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; }
.row-between { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 0.5rem; padding: 0.25rem 0; }
.list-row + .list-row { border-top: 1px solid var(--line); padding-top: 0.6rem; margin-top: 0.35rem; }

.auth { max-width: 420px; margin: 3rem auto; }
.auth h1 { margin-top: 0; }
.code-input { font-size: 1.6rem; letter-spacing: 0.3em; text-align: center; }
.qr { background: #fff; padding: 0.75rem; border-radius: 8px; width: fit-content; margin: 0.75rem auto; }
.qr svg { display: block; width: 200px; height: 200px; }
.secret { word-break: break-all; }
.steps { padding-left: 1.2rem; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; }
.stat-card { color: var(--text); border-top: 4px solid var(--c); }
.stat-title { font-weight: 700; margin-bottom: 0.5rem; }
.stats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.25rem; margin: 0; text-align: center; }
.stats dt { font-size: 0.75rem; color: var(--muted); }
.stats dd { margin: 0; font-size: 1.25rem; font-weight: 700; }
.stats .warn dd { color: var(--danger); }
.ok { color: var(--ok); font-weight: 600; }
.bad { color: var(--danger); font-weight: 600; }

.tag {
  display: inline-block; font-size: 0.75rem; font-weight: 600;
  padding: 0.05rem 0.45rem; border-radius: 999px;
  background: color-mix(in srgb, var(--c, var(--primary)) 18%, transparent);
  color: var(--c, var(--primary));
}
.tag.muted { --c: var(--muted); }
.dot { display: inline-block; width: 0.7rem; height: 0.7rem; border-radius: 50%; background: var(--c); }
.badge-blocked { font-size: 0.72rem; font-weight: 700; color: #fff; background: var(--danger); padding: 0.05rem 0.4rem; border-radius: 6px; }

.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.filters input[type=search] { flex: 1; min-width: 10rem; }
.day-nav { display: flex; align-items: center; gap: 0.25rem; }
.chips { display: flex; flex-wrap: wrap; gap: 0.35rem; width: 100%; margin-bottom: 0.5rem; }
.chip { border-radius: 999px; padding: 0.25rem 0.75rem; font-size: 0.85rem; border: 1px solid var(--line); background: var(--card); color: var(--muted); }
.chip.on { background: var(--primary); border-color: var(--primary); color: #fff; }

.events { list-style: none; padding: 0; }
.event { display: flex; gap: 0.75rem; padding: 0.6rem 1rem; border-bottom: 1px solid var(--line); }
.event:last-child { border-bottom: 0; }
.events > li.muted { padding: 1rem; }
.event time { color: var(--muted); font-variant-numeric: tabular-nums; min-width: 3.2rem; font-size: 0.85rem; padding-top: 0.1rem; }
.event-body { min-width: 0; flex: 1; }
.event-head { display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; }
.type { font-size: 0.75rem; color: var(--muted); }
.summary { font-weight: 600; word-break: break-word; }
.detail, .reason { font-size: 0.82rem; color: var(--muted); word-break: break-all; }
.is-blocked { background: var(--danger-bg); }
.pager { display: flex; justify-content: space-between; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.45rem 0.5rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: 0.8rem; color: var(--muted); font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.domain { word-break: break-all; }

.code-card { text-align: center; }
.enroll-code { font-size: 2.2rem; font-weight: 800; letter-spacing: 0.15em; margin: 0.5rem 0; font-family: ui-monospace, Consolas, monospace; }

@media (max-width: 560px) {
  .stats dd { font-size: 1.05rem; }
  .event { padding: 0.55rem 0.75rem; gap: 0.5rem; }
}