:root {
  --bg: #f6f7f9; --surface: #ffffff; --text: #1b1f24; --muted: #59616b; --border: #d6dbe1;
  --accent: #0b5cad; --accent-text: #ffffff; --danger: #b42318; --ok: #157347; --warn: #7a5200;
  --chip: #eef2f6; --focus: #ffbf47; --radius: 8px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111418; --surface: #1a1e24; --text: #e7eaee; --muted: #a3acb6; --border: #2e353e;
    --accent: #5aa2f0; --accent-text: #0b1420; --danger: #ff8a7a; --ok: #6fd39b; --warn: #f0c35a; --chip: #232a33;
  }
}
:root[data-theme="dark"] {
  --bg: #111418; --surface: #1a1e24; --text: #e7eaee; --muted: #a3acb6; --border: #2e353e;
  --accent: #5aa2f0; --accent-text: #0b1420; --danger: #ff8a7a; --ok: #6fd39b; --warn: #f0c35a; --chip: #232a33;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--text); font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--surface); padding: 8px; z-index: 10; }
.skip:focus { left: 8px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.topbar { display: flex; align-items: center; gap: 12px; padding: 8px 16px; background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 5; flex-wrap: wrap; }
.brand { font-weight: 700; }
.bizdate { background: var(--chip); padding: 4px 10px; border-radius: 999px; font-weight: 600; font-size: 13px; }
.user { margin-left: auto; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.menu-btn { display: none; }
.layout { display: flex; min-height: calc(100vh - 52px); }
.nav { width: 210px; flex: none; background: var(--surface); border-right: 1px solid var(--border); padding: 8px 0; }
.nav a { display: block; padding: 9px 16px; color: var(--text); text-decoration: none; }
.nav a[aria-current="page"] { background: var(--chip); font-weight: 600; border-left: 3px solid var(--accent); padding-left: 13px; }
main { flex: 1; padding: 16px; min-width: 0; }
h1 { font-size: 22px; margin: 0 0 12px; }
h2 { font-size: 17px; margin: 18px 0 8px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; margin-bottom: 14px; }
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.stat { font-size: 28px; font-weight: 700; }
.muted { color: var(--muted); }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: end; }
.row > * { flex: 1 1 140px; }
.row > .shrink { flex: 0 0 auto; }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
input, select, textarea { width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--text); font: inherit; min-height: 40px; }
.field { margin-bottom: 10px; }
button, .button { background: var(--accent); color: var(--accent-text); border: 0; padding: 8px 14px; border-radius: 6px; font: inherit; font-weight: 600; cursor: pointer; min-height: 40px; text-decoration: none; display: inline-flex; align-items: center; }
button.secondary, .button.secondary { background: var(--chip); color: var(--text); }
button.danger { background: var(--danger); color: #fff; }
button.small { padding: 4px 10px; min-height: 32px; font-size: 13px; }
button.link { background: none; color: var(--accent); padding: 0; min-height: auto; font-weight: 500; }
button:disabled { opacity: .5; cursor: not-allowed; }
.icon-btn { background: var(--chip); color: var(--text); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: var(--surface); }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.chip { display: inline-block; padding: 2px 8px; border-radius: 999px; background: var(--chip); font-size: 12px; font-weight: 600; }
.chip.ok { color: var(--ok); } .chip.warn { color: var(--warn); } .chip.bad { color: var(--danger); }
.actions { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; margin-top: 12px; }
td .actions { justify-content: flex-start; margin-top: 0; }
.error { color: var(--danger); min-height: 1em; margin: 6px 0 0; }
.alert { border-left: 4px solid var(--warn); }
.alert.CRITICAL { border-left-color: var(--danger); }

.avail td.cell { text-align: center; font-variant-numeric: tabular-nums; }
.avail td.zero { color: var(--danger); font-weight: 700; }

.rooms { display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.room { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px; }
.room .num { font-size: 20px; font-weight: 700; }

dialog { border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; width: min(560px, calc(100vw - 32px)); background: var(--surface); color: var(--text); }
dialog::backdrop { background: rgb(0 0 0 / .45); }
.toast { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 6px; opacity: 0; transition: opacity .2s; pointer-events: none; max-width: calc(100vw - 32px); }
.toast.show { opacity: 1; }
.login { max-width: 380px; margin: 10vh auto; }

@media (max-width: 800px) {
  .menu-btn { display: inline-flex; }
  .nav { position: fixed; top: 52px; left: 0; bottom: 0; z-index: 6; transform: translateX(-100%); transition: transform .15s; }
  .nav.open { transform: none; box-shadow: 0 0 0 100vw rgb(0 0 0 / .3); }
  main { padding: 12px 16px; }
  .user select { max-width: 150px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* Tape chart */
.tape { border-collapse: separate; border-spacing: 0; font-size: 13px; }
.tape th, .tape td { padding: 4px 6px; border-bottom: 1px solid var(--border); border-right: 1px solid var(--border); white-space: nowrap; }
.tape th.room, .tape td.room { position: sticky; left: 0; background: var(--surface); z-index: 1; font-weight: 600; }
.tape td.bar { border-radius: 4px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; max-width: 1px; }
.tape td.bar a { color: inherit; text-decoration: none; }
.tape td.k-STAY_SEGMENT { background: var(--accent); color: var(--accent-text); }
.tape td.k-ASSIGNMENT { background: var(--chip); color: var(--text); outline: 2px dashed var(--accent); outline-offset: -2px; }
.tape td.k-BLOCK { background: var(--danger); color: #fff; }
.tape td.today { box-shadow: inset 0 -3px 0 var(--focus); }
.tape .win { display: block; font-size: 11px; color: var(--warn); }
.legend span { margin-right: 12px; }

/* Guest registration card (printable) */
.grc { max-width: 760px; }
.grc h1 { font-size: 20px; }
.grc .sign { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 40px; }
.grc .sign div { border-top: 1px solid var(--text); padding-top: 4px; font-size: 13px; }
@media print {
  .topbar, .nav, .no-print, .skip, .toast { display: none !important; }
  body { background: #fff; color: #000; }
  .layout, main { display: block; padding: 0; margin: 0; }
  .card { border: 0; padding: 0; }
}

/* Two-step sign-in setup: the QR code needs a light quiet zone in both themes to scan reliably. */
.qr { display: block; margin: .5rem 0; background: #fff; padding: 4px; border-radius: 4px; max-width: 100%; height: auto; }
.mono { font-family: ui-monospace, Consolas, monospace; letter-spacing: .05em; overflow-wrap: anywhere; }