:root {
  color-scheme: light;
  --bg: #ffffff;
  --fg: #1a1a2e;
  --muted: #6b7280;
  --line: #e5e7eb;
  --grid-line: #e5e7eb;
  --busy: #64748b;
  --busy-border: #475569;
  --accent: #2563eb;
  --link: #1d4ed8;
  --danger: #dc2626;
  --warn-bg: #fef3c7;
  --warn-fg: #92400e;
  --card: #f8fafc;
  --non-working: #f1f3f5;
  --non-working-layer: rgba(100, 116, 139, 0.16);
  --all-day-busy: rgba(100, 116, 139, 0.3);
  --padding: rgba(100, 116, 139, 0.34);
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #04070d;
    --fg: #ffffff;
    --muted: #e2e8f0;
    --line: #94a3b8;
    --grid-line: #526079;
    --busy: #5f7497;
    --busy-border: #f1f5f9;
    --accent: #3b82f6;
    --link: #93c5fd;
    --danger: #fca5a5;
    --warn-bg: #422f0d;
    --warn-fg: #fde68a;
    --card: #1c2538;
    --non-working: #3a465f;
    --non-working-layer: rgba(203, 213, 225, 0.28);
    --all-day-busy: rgba(95, 116, 151, 0.9);
    --padding: rgba(148, 163, 184, 0.68);
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--fg);
}
a { color: var(--link); }
header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--line);
}
header h1 { font-size: 1.1rem; margin: 0 auto 0 0; }
select, input, button, textarea {
  font: inherit;
  line-height: 1.25;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.35rem 0.6rem;
}
button { cursor: pointer; }
button:hover { border-color: var(--accent); }
button:disabled { cursor: not-allowed; }
input::placeholder, textarea::placeholder { color: var(--muted); opacity: 1; }
#schedule-dialog [placeholder^="Optional"]::placeholder { opacity: 0.5; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.danger { color: var(--danger); border-color: var(--danger); }
.badge {
  display: inline-block;
  font-size: 0.72rem;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  margin-left: 0.3rem;
  vertical-align: middle;
}
.badge.warn { background: var(--warn-bg); color: var(--warn-fg); border-color: transparent; }
.badge.err { color: var(--danger); border-color: var(--danger); }

/* ---- shared date picker and single-day timeline ---- */
.public-shell { max-width: 980px; margin: 0 auto; padding: 1rem; }
.public-header { border: none; padding: 0 0 1rem; }
.public-header h1 { font-size: 1.25rem; }
.timezone-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.timezone-picker {
  position: relative;
  width: min(390px, 88vw);
}
.timezone-picker-trigger {
  position: relative;
  width: 100%;
  padding-right: 2rem;
  text-align: left;
}
.timezone-picker-trigger::after {
  content: "▾";
  position: absolute;
  right: 0.7rem;
}
.timezone-picker-menu {
  position: absolute;
  z-index: 20;
  top: calc(100% + 0.3rem);
  right: 0;
  width: min(430px, calc(100vw - 2rem));
  padding: 0.45rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.34);
}
.timezone-offset-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.45rem;
  align-items: center;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--line);
}
.timezone-offset-prefix { font-weight: 700; }
.timezone-offset-field { width: 100%; min-width: 0; }
.timezone-picker-list {
  display: grid;
  gap: 0.15rem;
  max-height: 300px;
  margin-top: 0.4rem;
  overflow-y: auto;
}
.timezone-picker-option {
  border: 0;
  padding: 0.45rem 0.55rem;
  text-align: left;
}
.timezone-picker-option:hover,
.timezone-picker-option[aria-selected="true"] {
  background: var(--non-working);
  outline: 1px solid var(--line);
}
.timezone-error {
  color: var(--danger);
  font-size: 0.72rem;
  flex-basis: 100%;
  text-align: right;
}
.timezone-error:empty { display: none; }
.timezone-setting-row { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.public-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
}
#day-view { max-width: 720px; margin: 0 auto; }
.day-view-heading { display: grid; gap: 0.65rem; margin-bottom: 0.75rem; }
.day-step-navigation {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.65rem;
}
.day-step-navigation h2 { margin: 0; text-align: center; font-size: 1.05rem; }
.day-view-actions { display: flex; justify-content: space-between; gap: 0.65rem; }
.view-heading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.view-heading h2 { margin: 0 auto 0 0; font-size: 1.15rem; }
.month-nav {
  display: grid;
  grid-template-columns: 2.5rem 1fr 2.5rem;
  align-items: center;
  margin-bottom: 0.75rem;
}
.month-title { margin: 0; text-align: center; font-size: 1.15rem; }
.month-nav-button { padding: 0.4rem; }
.month-calendar {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.weekday-heading {
  padding: 0.45rem 0.2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.75rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.calendar-day {
  min-height: 82px;
  border: 0;
  border-radius: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 0.45rem;
  text-align: left;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
}
.calendar-day:hover { box-shadow: inset 0 0 0 2px var(--accent); }
.calendar-day.non-working-day { background: var(--non-working); }
.calendar-day.all-day-busy {
  background: var(--all-day-busy);
  box-shadow: inset 0 0 0 2px var(--busy-border);
}
.calendar-day.all-day-busy:hover { box-shadow: inset 0 0 0 3px var(--accent); }
.calendar-day.outside-month { color: var(--muted); opacity: 0.6; }
.calendar-day.unavailable {
  color: var(--muted);
  background: var(--bg);
  opacity: 0.34;
}
.calendar-day.unavailable:hover { box-shadow: none; }
.calendar-day.selected { box-shadow: inset 0 0 0 3px var(--accent); }
.calendar-day-number { font-weight: 600; }
.calendar-holiday-name {
  font-size: 0.67rem;
  line-height: 1.2;
  color: var(--muted);
}
.calendar-legend, .timeline-legend {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
  color: var(--muted);
  font-size: 0.78rem;
  margin-top: 0.75rem;
}
.calendar-legend { gap: 0.45rem; }
.day-timeline {
  display: grid;
  grid-template-columns: 3.8rem minmax(0, 1fr);
  min-width: 420px;
}
.day-timeline.has-secondary {
  grid-template-columns: 3.8rem minmax(0, 1fr) 4.2rem;
}
.timeline-zone-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 0 0.45rem;
  color: var(--muted);
  font-size: 0.7rem;
}
.secondary-zone-label { text-align: right; }
.day-timeline-axis, .day-timeline-track { position: relative; height: 1200px; }
.day-timeline-hour {
  position: absolute;
  right: 0.5rem;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 0.7rem;
}
.day-timeline-hour.first-hour { transform: none; }
.day-timeline-hour.last-hour { transform: translateY(-100%); }
.secondary-axis .day-timeline-hour { left: 0.5rem; right: auto; }
.day-timeline-track {
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.day-timeline-line {
  position: absolute;
  left: 0;
  right: 0;
  border-top: 1px solid var(--grid-line);
  z-index: 1;
}
.off-hours-block {
  position: absolute;
  left: 0;
  right: 0;
  background: var(--non-working-layer);
  z-index: 0;
}
.timeline-block {
  position: absolute;
  left: 6px;
  right: 6px;
  border-radius: 5px;
  min-height: 4px;
  overflow: hidden;
  text-align: left;
}
.timeline-block.busy {
  background: var(--busy);
  border: 1px solid var(--busy-border);
  z-index: 3;
}
.timeline-block.padding {
  background: var(--padding);
  border: 1px dashed var(--busy-border);
  z-index: 2;
}
.timeline-block.connects-before {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
  border-top-width: 0;
}
.timeline-block.connects-after {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  border-bottom-width: 0;
}
.timeline-block.inactive-padding { opacity: 0.25; }
.timeline-block.admin-event {
  color: #fff;
  padding: 0.2rem 0.4rem;
  cursor: pointer;
  font: inherit;
}
.timeline-block.admin-event.hidden-event-block { opacity: 0.45; }
.timeline-block.admin-event.free-event-block {
  background: repeating-linear-gradient(135deg, var(--busy), var(--busy) 7px, transparent 7px, transparent 13px);
  color: var(--fg);
}
.timeline-block-title, .timeline-block-meta, .timeline-block-badges {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.timeline-block-title { font-size: 0.76rem; font-weight: 650; }
.timeline-block-meta { font-size: 0.66rem; opacity: 0.9; }
.timeline-block-badges { margin-top: 0.15rem; }
.event-tag {
  display: inline-block;
  font-size: 0.6rem;
  line-height: 1.2;
  padding: 0.05rem 0.25rem;
  margin: 0 0.2rem 0.1rem 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
}
.timeline-empty {
  position: absolute;
  top: 42%;
  left: 1rem;
  right: 1rem;
  text-align: center;
  color: var(--muted);
  z-index: 4;
}
.timeline-scroll { overflow-x: auto; overflow-y: hidden; }
#day-view .timeline-scroll { overflow-x: hidden; }
#day-view .day-timeline { min-width: 0; }
.week-timeline { min-width: 920px; }
.week-timeline-header,
.week-timeline-body,
.week-all-day-row {
  display: grid;
  grid-template-columns: 3.8rem repeat(7, minmax(0, 1fr));
}
.week-day-header {
  min-height: 3.4rem;
  padding: 0.45rem 0.35rem;
  text-align: center;
  border: 1px solid var(--line);
  border-left: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.15rem;
}
.week-day-header.non-working-day { background: var(--non-working); }
.week-holiday-name {
  color: var(--muted);
  font-size: 0.63rem;
  line-height: 1.15;
}
.week-axis-spacer {
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.week-all-day-label,
.week-all-day-cell {
  min-height: 2.7rem;
  padding: 0.3rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.week-all-day-label {
  border-left: 1px solid var(--line);
  padding: 0.45rem 0.35rem;
  color: var(--muted);
  font-size: 0.65rem;
  text-align: right;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.week-all-day-cell { display: grid; gap: 0.25rem; }
.week-all-day-event {
  display: block;
  width: 100%;
  min-width: 0;
  font: inherit;
  line-height: 1.25;
  padding: 0.25rem 0.35rem;
  overflow: hidden;
  color: #fff;
  background: var(--busy);
  border: 1px solid var(--busy-border);
  border-radius: 6px;
  text-align: left;
}
.week-all-day-event.hidden-event-block { opacity: 0.45; }
.week-all-day-event.free-event-block {
  color: var(--fg);
  background: repeating-linear-gradient(
    135deg, var(--busy), var(--busy) 7px, transparent 7px, transparent 13px
  );
}
.week-timeline-axis,
.week-day-track { height: 1200px; position: relative; }
.week-timeline-axis {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.week-day-track { border-left: 0; }
.week-day-track.non-working-day-track { background-color: var(--non-working); }
.week-day-track .timeline-block { left: 3px; right: 3px; }
.week-day-track .timeline-block.admin-event { padding: 0.16rem 0.25rem; }
.week-day-track .timeline-block-title { font-size: 0.68rem; }
.week-day-track .timeline-block-meta { font-size: 0.59rem; }
.week-day-track .event-tag { font-size: 0.54rem; }
.week-day-track .timeline-block.admin-event.compact-event {
  display: flex;
  align-items: center;
  padding: 0.05rem 0.16rem;
}
.week-day-track .compact-event .timeline-block-title {
  width: 100%;
  font-size: 0.62rem;
  line-height: 1.05;
}
.week-day-track .compact-event .timeline-block-meta,
.week-day-track .compact-event .timeline-block-badges,
.week-day-track .condensed-event .timeline-block-badges {
  display: none;
}
.admin-week-controls { justify-content: space-between; }
.admin-week-controls h2 { margin: 0; }
.week-navigation { display: flex; gap: 0.4rem; }
.legend-item { display: inline-flex; align-items: center; gap: 0.35rem; }
.legend-swatch {
  display: inline-block;
  width: 0.9rem; height: 0.9rem;
  background: var(--busy);
  border-radius: 3px;
  vertical-align: -0.15rem;
  margin-right: 0.3rem;
}
.busy-swatch { background: var(--busy); border: 1px solid var(--busy-border); }
.padding-swatch { background: var(--padding); border: 1px dashed var(--busy-border); }
.non-working-swatch { background: var(--non-working); border: 1px solid var(--line); }
.public-note { color: var(--muted); font-size: 0.8rem; line-height: 1.35; }
.status-notice {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  padding: 0.65rem 0.8rem;
  margin: 0 0 0.85rem;
  font-size: 0.82rem;
}
@media (prefers-color-scheme: dark) {
  .status-notice {
    background: #172554;
    color: #dbeafe;
    border-color: #3b82f6;
  }
}

dialog {
  width: min(520px, calc(100vw - 2rem));
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.28);
}
dialog::backdrop { background: rgba(15, 23, 42, 0.55); }
.dialog-body { padding: 1.1rem; }
.dialog-heading { display: flex; align-items: center; gap: 0.75rem; }
.dialog-heading h2 { margin: 0 auto 0 0; font-size: 1.1rem; }
.dialog-close { border: 0; font-size: 1.2rem; padding: 0.2rem 0.4rem; }
.field { display: grid; gap: 0.3rem; margin-top: 0.85rem; }
.field label, .field > span { font-size: 0.8rem; font-weight: 600; }
.time-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; }
.dialog-actions { display: flex; justify-content: flex-end; margin-top: 1rem; }
.conflict-warning {
  background: var(--warn-bg);
  color: var(--warn-fg);
  border-radius: 7px;
  padding: 0.65rem;
  margin-top: 0.85rem;
  font-size: 0.82rem;
}

/* ---- admin ---- */
main.admin { max-width: 1100px; margin: 0 auto; padding: 1rem; }
section.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 1.25rem;
}
section.card > h2 { margin: 0 0 0.75rem; font-size: 1rem; }
table { border-collapse: collapse; width: 100%; font-size: 0.88rem; }
th, td { text-align: left; padding: 0.4rem 0.5rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 500; }
tr.hidden-event td { opacity: 0.45; }
.row-form { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; margin-top: 0.75rem; }
.row-form label { display: inline-flex; align-items: center; gap: 0.35rem; }
.mini { font-size: 0.78rem; color: var(--muted); }
.url-cell { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: monospace; font-size: 0.75rem; }
#login-box { max-width: 320px; margin: 15vh auto; text-align: center; }
#login-box input { width: 100%; margin-bottom: 0.6rem; }
.inline-edit { display: flex; gap: 0.3rem; align-items: center; flex-wrap: wrap; }
.inline-edit input[type="number"] { width: 4.2rem; }
.error-text { color: var(--danger); font-size: 0.85rem; }
.success-text { color: #15803d; }
@media (prefers-color-scheme: dark) {
  .success-text { color: #86efac; }
}
.account-block + .account-block { margin-top: 1rem; }
.account-heading {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.65rem;
}
.account-heading h3 { margin: 0; font-size: 1.05rem; line-height: 1.25; }
.account-heading button { font-size: 0.875rem; font-weight: 400; }
.event-editor-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.event-editor-header h2 { margin: 0; }
.event-summary-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.8rem;
  margin-bottom: 1rem;
}
.event-summary-card h3 { margin: 0 0 0.35rem; }
.event-summary-card p { margin: 0.35rem 0 0; }
#editor-event-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.7rem;
}
#editor-event-tags .badge { margin-left: 0; }
.event-editor-actions { display: grid; gap: 1.25rem; }
.event-editor-actions h3 { margin: 0 0 0.6rem; }
.event-editor-actions .row-form { margin-top: 0; }

@media (max-width: 640px) {
  .public-shell { padding: 0.65rem; }
  .public-card { padding: 0.65rem; }
  .calendar-day { min-height: 62px; padding: 0.3rem; }
  .calendar-holiday-name { font-size: 0.58rem; }
  .day-timeline { min-width: 340px; grid-template-columns: 3.4rem minmax(0, 1fr); }
  .time-fields { grid-template-columns: 1fr; }
  .public-header h1 { flex-basis: 100%; }
  .timezone-controls, .timezone-picker { width: 100%; }
  .admin > header h1 { flex-basis: 100%; }
  .event-editor-header { flex-wrap: wrap; }
}