:root {
  --bg: #f4f6f5;
  --card: #ffffff;
  --text: #1d2621;
  --muted: #5f6b64;
  --line: #d8dfdb;
  --accent: #1f7a4d;
  --accent-text: #ffffff;
  --alert: #b3261e;
  --alert-bg: #fdecea;
  --paused-bg: #fff6e0;
  --ok-bg: #e8f5ee;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121614;
    --card: #1c221f;
    --text: #e6ece8;
    --muted: #9aa7a0;
    --line: #333d38;
    --accent: #3fae78;
    --accent-text: #0b1510;
    --alert: #ff8a80;
    --alert-bg: #3a1c1a;
    --paused-bg: #3a3218;
    --ok-bg: #173226;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

main { max-width: 720px; margin: 0 auto; padding: 12px 16px 96px; }

h1 { font-size: 1.35rem; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 0 0 8px; }
h3 { font-size: 1rem; margin: 16px 0 4px; }

.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; gap: 4px; align-items: stretch;
  background: var(--card); border-bottom: 1px solid var(--line);
  padding: 4px 8px; overflow-x: auto;
}
.nav a, .nav .link {
  display: flex; align-items: center; min-height: 48px; padding: 0 14px;
  color: var(--text); text-decoration: none; border-radius: 10px; font-weight: 600;
}
.nav a.active { background: var(--ok-bg); color: var(--accent); }
.nav-logout { margin-left: auto; display: flex; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px; margin: 12px 0;
}
.card.narrow { max-width: 420px; margin: 40px auto; }

.status-ok { background: var(--ok-bg); }
.status-alert { background: var(--alert-bg); border-color: var(--alert); }
.status-alert h1 { color: var(--alert); }
.status-paused { background: var(--paused-bg); }

label { display: block; margin: 12px 0; font-weight: 600; }
input[type="text"], input[type="password"], input[type="number"], input[type="datetime-local"],
select, textarea {
  display: block; width: 100%; min-height: 48px; margin-top: 4px; padding: 8px 12px;
  font-size: 17px; color: var(--text); background: var(--card);
  border: 1px solid var(--line); border-radius: 10px;
}
.lead input[type="number"] { display: inline-block; width: 5.5em; }
.range-row select { display: inline-block; width: auto; min-width: 6.5em; }

button, .button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 18px; margin: 4px 0;
  font-size: 16px; font-weight: 600; color: var(--text); text-decoration: none;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px; cursor: pointer;
}
button.primary, .button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); width: 100%; }
button.link { background: none; border: 0; margin: 0; }
button.icon { min-width: 48px; padding: 0 10px; color: var(--muted); }

.flash { padding: 12px 16px; border-radius: 10px; margin: 12px 0; font-weight: 600; }
.flash-error { background: var(--alert-bg); color: var(--alert); }
.flash-info { background: var(--ok-bg); }

.muted { color: var(--muted); }
.small { font-size: 0.9rem; }
.pre { white-space: pre-wrap; }
.error-text { color: var(--alert); }

.list { list-style: none; padding: 0; margin: 0; }
.list li { padding: 10px 0; border-bottom: 1px solid var(--line); }
.list li:last-child { border-bottom: 0; }

.filter { display: flex; gap: 8px; align-items: center; }
.filter select { flex: 1; margin: 0; }

.decisions { list-style: none; padding: 0; margin: 8px 0 0; }
.decision { border-top: 1px solid var(--line); }
.decision summary { padding: 12px 0; cursor: pointer; list-style: none; }
.decision summary::-webkit-details-marker { display: none; }
.decision .reason { display: block; }
.checks { list-style: none; padding: 0 0 12px 8px; margin: 0; }
.checks .pass { color: var(--accent); }
.checks .fail { color: var(--alert); }

.badge {
  display: inline-block; padding: 1px 8px; margin-right: 4px; border-radius: 999px;
  font-size: 0.8rem; font-weight: 700; background: var(--line); color: var(--text);
}
.outcome-booked { background: var(--accent); color: var(--accent-text); }
.outcome-failed { background: var(--alert); color: #fff; }

.switch { display: flex; align-items: center; gap: 12px; min-height: 48px; }
.switch input { width: 28px; height: 28px; }

.rule { border: 1px dashed var(--line); border-radius: 12px; padding: 12px; margin: 12px 0; }
.rule-head { display: flex; justify-content: space-between; align-items: center; }
.days { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.day { margin: 0; font-weight: 600; }
.day input { position: absolute; opacity: 0; }
.day span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 48px; min-height: 48px; border: 1px solid var(--line); border-radius: 10px;
}
.day input:checked + span { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.day input:focus-visible + span { outline: 3px solid var(--accent); outline-offset: 2px; }
.range-row { display: flex; align-items: center; gap: 6px; margin: 6px 0; flex-wrap: wrap; }
.lead { margin-top: 8px; }

fieldset { border: 0; padding: 0; margin: 12px 0; }
legend { font-weight: 600; }
.choice { display: flex; align-items: center; gap: 10px; min-height: 48px; margin: 0; font-weight: 400; }
.choice input { width: 24px; height: 24px; }

form.inline { display: flex; gap: 8px; align-items: center; }
form.inline select { flex: 1; margin: 0; }

.sticky-save {
  position: sticky; bottom: 0; padding: 12px 0;
  background: linear-gradient(to top, var(--bg) 70%, transparent);
}