:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --line: #e3e6ea;
  --ink: #1f2430;
  --muted: #6b7280;
  --accent: #4f46e5;
  --accent-soft: #eef0fd;
  --mine: #0f766e;
  --mine-soft: #d9f2ee;
  --other: #b45309;
  --other-soft: #fdf0dc;
  --hour: 52px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161b;
    --panel: #1c1f27;
    --line: #2c313c;
    --ink: #e7e9ee;
    --muted: #9aa1ad;
    --accent: #8b85f5;
    --accent-soft: #262347;
    --mine-soft: #10362f;
    --other-soft: #3a2b12;
  }
}

* { box-sizing: border-box; }

/* Author display rules below (grid/flex) would otherwise override the UA
   [hidden] rule, so enforce it explicitly. */
[hidden] { display: none !important; }

body {
  margin: 0;
  font: 15px/1.4 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  flex-wrap: wrap;
}
.topbar h1 { font-size: 18px; margin: 0; }

.rooms { display: flex; gap: 6px; }
.rooms button {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
}
.rooms button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.weeknav { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.weeknav button {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
}
.week-label { color: var(--muted); font-variant-numeric: tabular-nums; min-width: 190px; }

.banner {
  margin: 10px 20px 0;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  color: var(--ink);
  font-size: 14px;
}

.calendar {
  display: grid;
  grid-template-columns: 56px repeat(7, 1fr);
  overflow-x: auto;
  padding: 0 12px 40px;
}

.col-head {
  position: sticky;
  top: 57px;
  background: var(--bg);
  padding: 8px 4px;
  text-align: center;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  z-index: 5;
}
.col-head small { display: block; color: var(--muted); font-weight: 400; }
.col-head.is-today { color: var(--accent); }

.gutter { position: relative; }
.gutter .hour-label {
  height: var(--hour);
  font-size: 12px;
  color: var(--muted);
  text-align: right;
  padding-right: 6px;
  transform: translateY(-7px);
}

.day {
  position: relative;
  border-left: 1px solid var(--line);
  cursor: pointer;
}
.day .hour-line {
  height: var(--hour);
  border-bottom: 1px solid var(--line);
}

.booking {
  position: absolute;
  left: 3px;
  right: 3px;
  border-radius: 7px;
  padding: 4px 6px;
  font-size: 12px;
  overflow: hidden;
  border: 1px solid transparent;
  cursor: default;
}
.booking .b-time { font-weight: 600; }
.booking .b-who { color: var(--muted); }
.booking.mine { background: var(--mine-soft); border-color: var(--mine); }
.booking.other { background: var(--other-soft); border-color: var(--other); }
.booking.block {
  background: repeating-linear-gradient(45deg, #6b728033, #6b728033 6px, #6b728011 6px, #6b728011 12px);
  border-color: var(--muted);
  color: var(--muted);
}
.booking .b-repeat { opacity: .8; }

dialog {
  border: none;
  border-radius: 14px;
  padding: 22px;
  width: min(360px, 92vw);
  background: var(--panel);
  color: var(--ink);
  box-shadow: 0 12px 40px rgba(0,0,0,.25);
}
dialog::backdrop { background: rgba(0,0,0,.4); }
dialog h2 { margin: 0 0 14px; font-size: 17px; }
dialog label { display: block; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
dialog input, dialog select {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}
dialog label.check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: 14px;
  cursor: pointer;
}
dialog label.check input { width: auto; margin: 0; }
dialog .hint { display: block; margin-top: 4px; color: var(--muted); font-size: 12px; }
dialog .est { font-weight: 600; color: var(--ink); }
dialog .err { color: #dc2626; min-height: 18px; margin: 4px 0 0; }
dialog menu { display: flex; justify-content: flex-end; gap: 10px; padding: 0; margin: 16px 0 0; }
dialog menu button {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
}
dialog menu button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
dialog menu button.danger { background: #dc2626; border-color: #dc2626; color: #fff; font-weight: 600; }
.det-line { margin: 2px 0; color: var(--ink); }
.det-note { color: var(--muted); font-style: italic; }

/* settings dialog */
#settingsDialog { width: min(460px, 94vw); }
.room-setting {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 14px;
}
.room-setting .rs-title { font-weight: 600; margin: 0 0 10px; color: var(--ink); }
.room-setting .rs-rate { display: flex; align-items: center; gap: 6px; }
.room-setting .rs-rate .prefix { color: var(--muted); }
fieldset.hours {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 14px 14px;
  margin: 0 0 6px;
}
fieldset.hours legend { color: var(--muted); font-size: 13px; padding: 0 6px; }
fieldset.hours { display: flex; gap: 16px; }
fieldset.hours label { flex: 1; }

.badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
}

/* user chip */
.user { display: flex; align-items: center; gap: 10px; }
.user #userLabel { color: var(--muted); font-size: 13px; }
.user #logout {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
}

/* login screen */
.login-screen {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--bg);
  z-index: 50;
  padding: 20px;
}
.login-card {
  width: min(380px, 92vw);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 12px 40px rgba(0,0,0,.15);
}
.login-card h2 { margin: 0 0 6px; font-size: 22px; }
.login-sub { color: var(--muted); margin: 0 0 20px; font-size: 14px; }
.login-card input {
  display: block;
  width: 100%;
  margin-bottom: 12px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}
.login-card .primary {
  width: 100%;
  padding: 11px;
  border: none;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
}
.login-msg { margin: 14px 0 0; font-size: 13px; color: var(--mine); min-height: 18px; }
.login-msg.error { color: #dc2626; }