:root {
  --bg: #f6f5f2;
  --card: #ffffff;
  --text: #1f2328;
  --muted: #6b7280;
  --line: #e3e1dc;
  --accent: #2f6f4f;
  --accent-text: #ffffff;
  --warn-bg: #fff6e0;
  --warn-text: #7a5200;
  --err-bg: #fdecec;
  --err-text: #9b1c1c;
  --next-bg: #e8f0fb;
  --next-text: #1d4f91;
  --sat: #1d4f91;
  --sun: #b42318;
  --link: #1d4f91;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181b;
    --card: #1f2226;
    --text: #e8e6e3;
    --muted: #9aa1a9;
    --line: #33373d;
    --accent: #5fae86;
    --accent-text: #0f1a14;
    --warn-bg: #3a2f14;
    --warn-text: #f3cf7a;
    --err-bg: #3b1d1d;
    --err-text: #f4a5a5;
    --next-bg: #1d2c42;
    --next-text: #9cc3f5;
    --sat: #8fb6ee;
    --sun: #f09b92;
    --link: #8fb6ee;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
}
a { color: var(--link); }
main { max-width: 960px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.25rem; margin: 0 0 4px; }
h2 { font-size: 1.05rem; margin: 24px 0 8px; }
.muted { color: var(--muted); font-size: 0.9rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; }
button, select, input {
  font: inherit;
  color: inherit;
}
button {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  min-height: 40px;
}
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.danger { color: var(--err-text); }
button:disabled { opacity: 0.5; cursor: default; }
select, input[type="time"], input[type="date"], input[type="text"], input[type="email"], input[type="number"], input[type="month"] {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  min-height: 40px;
  width: 100%;
}
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }

.month-nav { display: flex; align-items: center; gap: 8px; margin: 12px 0; }
.month-nav .label { font-weight: 700; font-size: 1.1rem; min-width: 8em; text-align: center; }

.notice { padding: 10px 12px; border-radius: 8px; margin: 8px 0; font-size: 0.95rem; }
.notice.warn { background: var(--warn-bg); color: var(--warn-text); }
.notice.err { background: var(--err-bg); color: var(--err-text); }
.notice ul { margin: 4px 0 0; padding-left: 1.2em; }

/* 月の一覧（スタッフ画面） */
.days { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--card); }
.days li { border-top: 1px solid var(--line); }
.days li:first-child { border-top: none; }
.days button.day {
  width: 100%; text-align: left; border: none; border-radius: 0; background: transparent;
  display: grid; grid-template-columns: 4.2em 1fr auto; gap: 8px; align-items: center; padding: 10px 12px;
}
.day .date { font-weight: 600; }
.day .date.sat { color: var(--sat); }
.day .date.sun { color: var(--sun); }
.day .desc { font-size: 0.92rem; }
.day .desc .empty { color: var(--muted); }
.day .hours { font-variant-numeric: tabular-nums; font-weight: 600; }
.badge-next { display: inline-block; background: var(--next-bg); color: var(--next-text); border-radius: 4px; padding: 0 4px; font-size: 0.8rem; margin-right: 2px; }

/* 入力ダイアログ */
dialog {
  border: none; border-radius: 12px; padding: 0; width: min(520px, calc(100vw - 24px));
  background: var(--card); color: var(--text);
}
dialog::backdrop { background: rgba(0, 0, 0, 0.45); }
.dlg-head { padding: 14px 16px; border-bottom: 1px solid var(--line); font-weight: 700; }
.dlg-body { padding: 12px 16px; }
.dlg-foot { padding: 12px 16px; border-top: 1px solid var(--line); display: flex; gap: 8px; flex-wrap: wrap; }
.seg { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin-bottom: 10px; }
.seg-title { display: flex; align-items: center; justify-content: space-between; font-weight: 600; margin-bottom: 6px; }
.seg-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.seg-grid label { font-size: 0.85rem; color: var(--muted); display: block; }
.seg-grid .full { grid-column: 1 / -1; }
.seg-grid label .badge-next { margin-left: 4px; }
.nowrap { white-space: nowrap; }
td.wrap { white-space: normal; min-width: 12em; }
.preview { background: var(--bg); border-radius: 8px; padding: 10px 12px; font-variant-numeric: tabular-nums; }
.preview .big { font-size: 1.1rem; font-weight: 700; }

/* 表（経理画面） */
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; background: var(--card); font-variant-numeric: tabular-nums; }
th, td { border: 1px solid var(--line); padding: 6px 8px; text-align: left; white-space: nowrap; }
th { background: var(--bg); font-weight: 600; font-size: 0.9rem; }
td.num { text-align: right; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 12px 0; flex-wrap: wrap; }
.tabs button { border: none; border-bottom: 3px solid transparent; border-radius: 0; background: transparent; }
.tabs button[aria-selected="true"] { border-bottom-color: var(--accent); font-weight: 700; }
.hidden { display: none !important; }
details.staff { margin: 8px 0; }
details.staff summary { cursor: pointer; padding: 8px 0; font-weight: 600; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 8px; opacity: 0; transition: opacity 0.2s; pointer-events: none; }
.toast.show { opacity: 0.95; }