:root {
  --bg: #f4f5f7;
  --paper: #ffffff;
  --ink: #1d2733;
  --muted: #637083;
  --line: #d5dae1;
  --line-strong: #9aa4b1;
  --accent: #234e70;
  --accent-ink: #ffffff;
  --focus: #2f7de1;
  --weekend: #eceef2;
  --today: #f2b134;
  --ok: #1f7a4d;
  --warn: #b26a00;
  --bad: #c0392b;
  --bad-bg: #fdecea;
  --fam-D: #fff3d1;
  --fam-R: #fde6c8;
  --fam-T: #f3ead9;
  --fam-A: #ffe0d4;
  --fam-N: #dfe4ff;
  --fam-W: #d9f2e2;
  --fam-OFF: transparent;
  --fam-sick: #fbe0e3;
  --shadow: 0 8px 28px rgba(20, 30, 45, 0.18);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12161c;
    --paper: #1a2029;
    --ink: #e6eaf0;
    --muted: #9aa5b4;
    --line: #2f3845;
    --line-strong: #4b5768;
    --accent: #6ea8d8;
    --accent-ink: #0d1520;
    --focus: #5aa2ff;
    --weekend: #222a35;
    --today: #d99a1e;
    --ok: #5cc48d;
    --warn: #e2a33b;
    --bad: #ff7b6e;
    --bad-bg: #3a1f1d;
    --fam-D: #3b3420;
    --fam-R: #3d3020;
    --fam-T: #35302a;
    --fam-A: #40281f;
    --fam-N: #262d4d;
    --fam-W: #1f3a2b;
    --fam-sick: #43232a;
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #12161c; --paper: #1a2029; --ink: #e6eaf0; --muted: #9aa5b4; --line: #2f3845; --line-strong: #4b5768;
  --accent: #6ea8d8; --accent-ink: #0d1520; --focus: #5aa2ff; --weekend: #222a35; --today: #d99a1e;
  --ok: #5cc48d; --warn: #e2a33b; --bad: #ff7b6e; --bad-bg: #3a1f1d;
  --fam-D: #3b3420; --fam-R: #3d3020; --fam-T: #35302a; --fam-A: #40281f; --fam-N: #262d4d; --fam-W: #1f3a2b; --fam-sick: #43232a;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
[hidden] { display: none !important; }
body.viewer .edit-only, body:not(.viewer) .view-only { display: none !important; }
kbd {
  font: 12px ui-monospace, monospace;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0 4px;
  background: var(--paper);
}
.muted { color: var(--muted); }

/* ---------- buttons ---------- */
.btn {
  font: inherit;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 6px 11px;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { border-color: var(--line-strong); }
.btn:focus-visible, input:focus-visible, select:focus-visible, .grid-wrap:focus-visible { outline: 2px solid var(--focus); outline-offset: 1px; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn.danger { color: var(--bad); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover { border-color: var(--line); }
.btn.small { padding: 3px 8px; font-size: 13px; }
.btn.icon { padding: 4px 10px; font-size: 17px; line-height: 1.1; }
.btn:disabled { opacity: 0.45; cursor: default; }

input, select {
  font: inherit;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 5px 8px;
}

/* ---------- login ---------- */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card {
  width: min(360px, 100%);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 26px 24px;
  display: grid;
  gap: 12px;
  box-shadow: var(--shadow);
}
.login-card h1 { margin: 0; font-size: 22px; }
.login-card p { margin: 0; }
.login-card label { display: grid; gap: 4px; font-weight: 600; font-size: 13px; }
.login-card input { padding: 8px 10px; font-weight: 400; }
.login-error { color: var(--bad); min-height: 1.2em; }

/* ---------- top bar ---------- */
.bar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 8px 16px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.bar-left, .bar-actions, .bar-right { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.bar-left { gap: 14px; }
.bar-right { margin-left: auto; }
.brand { color: var(--accent); font-size: 15px; }
@media (max-width: 1500px) { .brand { display: none; } }
.month-nav { display: flex; align-items: center; gap: 4px; }
.month-nav h2 { margin: 0 4px; font-size: 17px; min-width: 8.3em; text-align: center; }
.bar-actions .btn:not(.icon) { padding: 6px 9px; }
.who { color: var(--muted); font-size: 13px; }
.sync { font-size: 12px; color: var(--muted); }
.sync.saving { color: var(--warn); }
.sync.error { color: var(--bad); font-weight: 600; }

/* ---------- roster grid ---------- */
.sheet { padding: 14px 16px 40px; }
.print-title { display: none; }
.grid-wrap {
  overflow-x: auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.grid { border-collapse: separate; border-spacing: 0; font-variant-numeric: tabular-nums; min-width: 100%; }
.grid th, .grid td {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
  padding: 0;
}
.grid thead th { background: var(--paper); font-weight: 600; font-size: 12px; color: var(--muted); padding: 3px 0; }
.grid thead tr.num th { color: var(--ink); font-size: 13px; }
.grid th.name {
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--paper);
  text-align: left;
  padding: 4px 10px;
  min-width: 108px;
  border-right: 1px solid var(--line-strong);
}
.grid thead th.name { z-index: 3; }
.name .nm { font-weight: 600; font-size: 14px; }
.name .tag { margin-left: 6px; font-size: 11px; color: var(--muted); font-weight: 600; letter-spacing: 0.03em; }
.grid .wk { background: var(--weekend); }
.grid thead th.hol { color: var(--bad); }
.grid thead th.today { box-shadow: inset 0 -3px 0 var(--today); }
.grid td.c {
  position: relative;
  min-width: 34px;
  height: 34px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  user-select: none;
}
.grid td.c:hover { box-shadow: inset 0 0 0 2px var(--line-strong); }
.viewer .grid td.c { cursor: default; }
.viewer .grid td.c:hover { box-shadow: none; }
.grid td.fam-D { background: var(--fam-D); }
.grid td.fam-R { background: var(--fam-R); }
.grid td.fam-T { background: var(--fam-T); }
.grid td.fam-A { background: var(--fam-A); }
.grid td.fam-N { background: var(--fam-N); }
.grid td.fam-W { background: var(--fam-W); }
.grid td.code-S, .grid td.code-V { background: var(--fam-sick); }
.grid td.code-AF { color: var(--muted); font-weight: 500; }
.grid td.unknown { color: var(--bad); text-decoration: wavy underline; }
.grid td.sel { box-shadow: inset 0 0 0 2px var(--focus); }
.grid td.sel.cursor { box-shadow: inset 0 0 0 3px var(--focus); }
.grid td.has-note::after {
  content: "";
  position: absolute;
  top: 3px;
  right: 3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.grid td.rest-bad::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  border-top: 9px solid var(--bad);
  border-right: 9px solid transparent;
}
.grid td.hrs, .grid th.hrs { min-width: 56px; padding: 0 6px; font-weight: 600; border-left: 1px solid var(--line-strong); }
.grid td.sun, .grid th.sun { min-width: 44px; padding: 0 6px; color: var(--muted); }
.grid td.hrs.ok { color: var(--ok); }
.grid td.hrs.off { color: var(--warn); }
.grid td.hrs small { display: block; font-size: 11px; font-weight: 500; }
.grid tfoot th.name { font-size: 12px; font-weight: 600; color: var(--muted); }
.grid tfoot td { height: 24px; font-size: 12px; }
.grid tfoot td.gap { background: var(--bad-bg); color: var(--bad); font-weight: 700; cursor: help; }
.grid tfoot td.okc { color: var(--ok); }
.grid tbody tr:last-child th, .grid tbody tr:last-child td { border-bottom: 2px solid var(--line-strong); }

.hint { color: var(--muted); font-size: 12px; margin: 8px 2px 14px; }

/* ---------- issues and legend ---------- */
.issues { margin: 0 0 16px; }
.issues details {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 14px;
}
.issues summary { cursor: pointer; font-weight: 600; }
.issues ul { margin: 8px 0 0; padding-left: 20px; columns: 2 360px; }
.issues li { margin: 2px 0; break-inside: avoid; }
.issues .all-good { color: var(--ok); font-weight: 600; margin: 0; padding: 10px 14px; background: var(--paper); border: 1px solid var(--line); border-radius: 10px; }
.rules {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 16px 4px;
  margin: 0 0 16px;
}
.rules-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.rules-head h3 { margin: 0; font-size: 15px; }
.rule-list { list-style: none; margin: 8px 0; padding: 0; }
.rule-list li { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 6px 0; border-top: 1px solid var(--line); }
.rule-list li:first-child { border-top: none; }
.rule-list b { font-weight: 600; }
.rules .muted { margin: 8px 0; }
.rule-preview { font-weight: 600; background: var(--bg); border-radius: 8px; padding: 8px 10px; margin: 4px 0 0; }
.grid td.rule-bad { outline: 2px dashed var(--bad); outline-offset: -3px; }
.rules .rot-table { width: auto; margin: 0 0 8px; }
.rules .rot-table th, .rules .rot-table td { padding: 3px 14px; text-align: center; }
.rules .rot-table tbody th { text-align: left; color: var(--ink); }
.legend {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 2px 24px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 13px;
}
.legend div { display: flex; justify-content: space-between; gap: 10px; padding: 1px 0; }
.legend b { min-width: 2.4em; display: inline-block; }
.legend .t { color: var(--muted); font-variant-numeric: tabular-nums; }
.duty-note { text-align: center; font-weight: 700; letter-spacing: 0.02em; margin: 16px 0 0; font-size: 13px; }

/* ---------- cell popover ---------- */
.pop {
  position: fixed;
  z-index: 40;
  width: 330px;
  max-width: calc(100vw - 16px);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 10px 12px 12px;
}
.pop-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; margin-bottom: 8px; }
.pop-head strong { font-size: 14px; }
.pop-head span { font-size: 12px; color: var(--muted); }
.pop-type { display: flex; gap: 6px; margin-bottom: 8px; }
.pop-type input { flex: 1; text-transform: uppercase; font-weight: 600; }
.pop-type input::placeholder { text-transform: none; font-weight: 400; }
.pop-groups { display: grid; gap: 5px; }
.pop-group { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; }
.pop-group > span { width: 70px; font-size: 11px; color: var(--muted); }
.pop-code {
  font: inherit;
  font-weight: 700;
  font-size: 12px;
  min-width: 38px;
  padding: 4px 6px;
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  color: var(--ink);
}
.pop-code:hover, .pop-code:focus-visible { border-color: var(--focus); outline: none; }
.pop-code.current { box-shadow: 0 0 0 2px var(--focus); }
.pop-note { display: flex; gap: 6px; margin-top: 10px; }
.pop-note input { flex: 1; }
.pop-desc { font-size: 12px; color: var(--muted); min-height: 1.3em; margin-top: 6px; }

/* ---------- dialog ---------- */
dialog {
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow);
  width: min(980px, calc(100vw - 24px));
  max-height: calc(100vh - 40px);
}
dialog.narrow { width: min(460px, calc(100vw - 24px)); }
dialog::backdrop { background: rgba(10, 16, 24, 0.45); }
.dlg-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.dlg-head h3 { margin: 0; font-size: 17px; }
.dlg-body { padding: 14px 18px; overflow: auto; max-height: calc(100vh - 170px); }
.dlg-body p { margin: 0 0 10px; }
.dlg-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 12px 18px; border-top: 1px solid var(--line); flex-wrap: wrap; }
.dlg-foot .left { margin-right: auto; }
.tabs { display: flex; gap: 4px; margin-bottom: 12px; border-bottom: 1px solid var(--line); }
.tabs button { font: inherit; background: none; border: none; padding: 8px 12px; cursor: pointer; color: var(--muted); border-bottom: 2px solid transparent; }
.tabs button.on { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th { text-align: left; font-size: 12px; color: var(--muted); font-weight: 600; padding: 4px 4px 6px; white-space: nowrap; }
.tbl td { padding: 3px 4px; border-top: 1px solid var(--line); vertical-align: middle; }
.tbl input, .tbl select { width: 100%; padding: 4px 6px; }
.tbl input.w-s { width: 64px; }
.tbl input.w-xs { width: 52px; }
.tbl .row-btns { white-space: nowrap; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px 18px; margin-bottom: 14px; }
.form-grid label { display: grid; gap: 4px; font-size: 12px; font-weight: 600; color: var(--muted); }
.form-grid label input, .form-grid label select { color: var(--ink); font-weight: 400; font-size: 14px; }
.note { font-size: 12px; color: var(--muted); margin: 4px 0 12px; }
.weekend-preview { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0 14px; font-size: 12px; }
.weekend-preview span { border: 1px solid var(--line); border-radius: 6px; padding: 2px 8px; }
.log-list { list-style: none; margin: 0; padding: 0; }
.log-list li { padding: 6px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 150px 120px 1fr; gap: 10px; }
.log-list .when { color: var(--muted); font-size: 12px; }

/* ---------- review box ---------- */
.badge { display: inline-block; margin-left: 6px; min-width: 18px; padding: 0 5px; border-radius: 9px; background: var(--bad); color: #fff; font-size: 11px; font-weight: 700; line-height: 18px; text-align: center; }
.seg { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 10px; }
.seg label { display: flex; align-items: center; gap: 6px; border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px; cursor: pointer; }
.seg label:has(input:checked) { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); font-weight: 600; }
.seg input { margin: 0; accent-color: var(--accent); }
.rb-text { width: 100%; font: inherit; color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; resize: vertical; min-height: 110px; }
.rb-inbox-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin: 18px 0 8px; padding-top: 14px; border-top: 1px solid var(--line); }
.rb-inbox-head h4 { margin: 0; }
.rb-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.rb-item { border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; }
.rb-item.done { opacity: 0.6; }
.rb-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; font-size: 12px; color: var(--muted); }
.rb-meta b { color: var(--ink); }
.rb-meta .btn { margin-left: auto; }
.rb-msg { margin: 6px 0 2px; white-space: pre-wrap; overflow-wrap: anywhere; }
.chip { font-size: 11px; font-weight: 700; border-radius: 5px; padding: 1px 7px; }
.chip.problem { background: var(--bad-bg); color: var(--bad); }
.chip.change { background: var(--fam-N); color: var(--ink); }
.chip.review { background: var(--fam-W); color: var(--ink); }

/* ---------- toasts ---------- */
.toasts { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); z-index: 60; display: grid; gap: 6px; }
.toast { background: var(--ink); color: var(--paper); padding: 8px 14px; border-radius: 8px; box-shadow: var(--shadow); font-size: 13px; }
.toast.error { background: var(--bad); color: #fff; }

@media (max-width: 720px) {
  .bar { padding: 8px 12px; }
  .bar-right { margin-left: 0; }
  .month-nav h2 { min-width: 0; font-size: 15px; }
  .sheet { padding: 10px 12px 30px; }
  .grid th.name { min-width: 92px; padding: 4px 6px; }
  .name .tag { display: block; margin: 0; }
  .log-list li { grid-template-columns: 1fr; gap: 0; }
}

/* ---------- print: A4 landscape, close to the paper roster ---------- */
@media print {
  @page { size: A4 landscape; margin: 8mm; }
  :root { --paper: #fff; --ink: #000; --line: #000; --line-strong: #000; --weekend: #d9d9d9; --muted: #000; }
  body { background: #fff; font-size: 11px; }
  .bar, .hint, .issues, .rules, .pop, .toasts, dialog, .grid tfoot, .grid .hrs, .grid .sun { display: none !important; }
  .sheet { padding: 0; }
  .print-title { display: block; font: italic 700 22px/1 Georgia, serif; letter-spacing: 0.25em; margin: 0 0 8px 2px; }
  .grid-wrap { border: 1.5px solid #000; border-radius: 0; overflow: visible; }
  .grid { width: 100%; }
  .grid th, .grid td { border-color: #000; }
  .grid td.c { height: 36px; min-width: 0; font-size: 13px; background: #fff !important; color: #000 !important; box-shadow: none !important; }
  .grid td.c.wk, .grid th.wk { background: var(--weekend) !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .grid td.has-note::after, .grid td.rest-bad::before { display: none; }
  .grid th.name { position: static; min-width: 90px; }
  .legend { border: none; padding: 8px 0 0; grid-template-columns: repeat(4, 1fr); font-size: 10px; gap: 0 18px; }
  .duty-note { font-size: 11px; margin-top: 6px; }
}