:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #e2e5ea;
  --text: #1c2430;
  --muted: #667085;
  --primary: #2563eb;
  --primary-text: #ffffff;
  --danger: #dc2626;
  --shadow: 0 6px 24px rgba(17, 24, 39, 0.12);
  --radius: 12px;
  --topbar-h: 56px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1420;
    --surface: #161d2b;
    --surface-2: #1e2736;
    --border: #2a3446;
    --text: #e6e9ef;
    --muted: #98a2b3;
    --primary: #3b82f6;
    --shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
}
button, select, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
.muted { color: var(--muted); }
.link {
  background: none; border: 0; color: var(--primary); padding: 2px 4px;
  text-decoration: underline;
}
[hidden] { display: none !important; }

/* ---------- top bar ---------- */
.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  min-height: var(--topbar-h);
  flex-wrap: wrap;
}
.brand { font-weight: 700; display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.brand span { font-size: 15px; }

.tabs {
  display: flex; gap: 4px; overflow-x: auto; flex: 1 1 260px;
  scrollbar-width: thin;
}
.tabs button {
  border: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: 999px;
  padding: 6px 14px;
  white-space: nowrap;
  border-left: 4px solid var(--tab-color, var(--border));
}
.tabs button.active {
  background: var(--primary);
  color: var(--primary-text);
  border-color: var(--primary);
}

.controls { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.view-switch { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.view-switch button { border: 0; background: var(--surface-2); padding: 6px 12px; }
.view-switch button.active { background: var(--primary); color: var(--primary-text); }
.colorby { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
.colorby select { padding: 5px 8px; border-radius: 8px; border: 1px solid var(--border); background: var(--surface); }

button.primary { background: var(--primary); color: var(--primary-text); border: 0; border-radius: 8px; padding: 8px 14px; font-weight: 600; }
button.danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); border-radius: 8px; padding: 7px 12px; }

.usermenu { position: relative; }
.usermenu > summary { list-style: none; cursor: pointer; padding: 6px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface-2); }
.usermenu > summary::-webkit-details-marker { display: none; }
.usermenu .menu {
  position: absolute; right: 0; top: calc(100% + 6px);
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  box-shadow: var(--shadow); padding: 8px; display: grid; gap: 6px; min-width: 160px; z-index: 50;
}
.usermenu .menu a, .usermenu .menu button { display: block; width: 100%; text-align: left; background: none; border: 0; padding: 8px; border-radius: 6px; text-decoration: none; color: var(--text); }
.usermenu .menu a:hover, .usermenu .menu button:hover { background: var(--surface-2); }

/* ---------- calendar ---------- */
#calendar {
  flex: 1 1 auto;
  min-height: 0;
  padding: 10px 12px;
  overflow: auto;
}
.fc { --fc-border-color: var(--border); --fc-page-bg-color: transparent; height: 100%; }
.fc .fc-toolbar-title { font-size: 1.15rem; }
.fc .fc-button {
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text);
  text-transform: capitalize; box-shadow: none;
}
.fc .fc-button-primary:not(:disabled).fc-button-active,
.fc .fc-button-primary:not(:disabled):active { background: var(--primary); border-color: var(--primary); color: #fff; }
.fc .fc-daygrid-day.fc-day-today, .fc .fc-timegrid-col.fc-day-today { background: color-mix(in srgb, var(--primary) 10%, transparent); }
.fc-event { cursor: pointer; border-radius: 6px; padding: 1px 3px; }
.fc-event.is-feed { opacity: 0.92; border-style: dashed; }

/* ---------- status bar ---------- */
.statusbar {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 14px; font-size: 12px; color: var(--muted);
  border-top: 1px solid var(--border); background: var(--surface);
}
.dot { width: 9px; height: 9px; border-radius: 50%; background: #9ca3af; flex: none; }
.dot.live { background: #22c55e; }
.dot.stale { background: #f59e0b; }
.legend { display: flex; flex-wrap: wrap; gap: 10px; margin-left: auto; }
.legend span { display: inline-flex; align-items: center; gap: 5px; }
.legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }

/* ---------- dialog ---------- */
dialog#eventDialog {
  border: 0; border-radius: 16px; padding: 0; width: min(620px, 94vw);
  background: var(--surface); color: var(--text); box-shadow: var(--shadow);
}
dialog#eventDialog::backdrop { background: rgba(10, 14, 22, 0.55); }
#eventForm > header, #eventForm > footer { display: flex; align-items: center; gap: 8px; padding: 14px 18px; }
#eventForm > header { border-bottom: 1px solid var(--border); }
#eventForm > header h2 { margin: 0; font-size: 1.05rem; flex: 1; }
#eventForm > footer { border-top: 1px solid var(--border); }
#eventForm .x { background: none; border: 0; font-size: 16px; color: var(--muted); }
#eventForm .spacer { flex: 1; }
#eventForm footer button:not(.primary):not(.danger) { background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px; padding: 8px 14px; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 14px; padding: 16px 18px; }
.grid label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.grid label input, .grid label select, .grid label textarea {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text); font-size: 14px;
}
.grid .col-2 { grid-column: 1 / -1; }
.grid .allday-row { flex-direction: row; align-items: center; gap: 8px; color: var(--text); }
.grid .allday-row input { width: auto; }
.color-field { display: flex; align-items: center; gap: 8px; }
.color-field input[type=color] { width: 44px; height: 34px; padding: 2px; }
.reminders { border: 1px solid var(--border); border-radius: 10px; padding: 8px 12px 12px; }
.reminders legend { font-size: 12px; color: var(--muted); padding: 0 4px; }
.reminder-row { display: flex; align-items: center; gap: 6px; margin-top: 6px; }
.reminder-row input[type=number] { width: 70px; }
.reminder-row select { padding: 6px 8px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); }
.reminder-row .rm { background: none; border: 0; color: var(--danger); font-size: 16px; }

.form-error { color: var(--danger); margin: 0 18px 12px; font-size: 13px; }

/* ---------- popover ---------- */
#eventPopover {
  position: fixed; z-index: 60; width: min(300px, 88vw);
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow); padding: 12px 14px;
}
#eventPopover .pop-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
#eventPopover .pop-swatch { width: 12px; height: 12px; border-radius: 3px; flex: none; }
#eventPopover dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 3px 10px; font-size: 13px; }
#eventPopover dt { color: var(--muted); }
#eventPopover dd { margin: 0; }
#eventPopover .pop-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 10px; }
#eventPopover .pop-edit { background: var(--primary); color: #fff; border: 0; border-radius: 7px; padding: 6px 12px; }

/* ---------- auth pages ---------- */
.auth-page { align-items: center; justify-content: center; }
.auth-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  box-shadow: var(--shadow); padding: 28px; width: min(380px, 92vw); margin: auto;
}
.auth-card h1 { margin: 0 0 4px; font-size: 1.2rem; }
.auth-card form { display: grid; gap: 12px; margin-top: 16px; }
.auth-card label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
.auth-card input { padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text); }
.auth-card button { background: var(--primary); color: #fff; border: 0; border-radius: 8px; padding: 10px; font-weight: 600; }

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .topbar { gap: 8px; }
  .brand span { display: none; }
  .controls { width: 100%; justify-content: space-between; }
  .colorby { order: 3; }
  .grid { grid-template-columns: 1fr; }
  dialog#eventDialog { width: 100vw; height: 100dvh; max-height: 100dvh; border-radius: 0; }
  #eventForm { display: flex; flex-direction: column; height: 100%; }
  #eventForm .grid { flex: 1; overflow: auto; }
  .fc .fc-toolbar.fc-header-toolbar { flex-direction: column; gap: 6px; }
}

/* ---------- kiosk ---------- */
body.kiosk .controls, body.kiosk .brand { display: none; }
body.kiosk .topbar { justify-content: center; }
body.kiosk.locked .tabs { display: none; }
body.kiosk { font-size: 17px; }
body.kiosk .fc .fc-toolbar-title { font-size: 1.5rem; }
body.kiosk .fc-event { font-size: 0.95rem; padding: 2px 5px; }
body.kiosk .statusbar { font-size: 13px; }