:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1d2433;
  --muted: #667085;
  --line: #e3e7ee;
  --accent: #0b63ce;
  --accent-soft: #e8f1fd;
  --theirs: #7a4fd6;
  --danger: #c4320a;
  --radius: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; }
.muted { color: var(--muted); }
.error { color: var(--danger); margin: 8px 0 0; }
.hint { color: var(--muted); font-size: .82rem; margin: -2px 0 4px; }

.btn {
  border: 1px solid var(--line); background: var(--card); color: var(--text);
  border-radius: 8px; padding: 8px 14px; font: inherit; cursor: pointer; text-decoration: none;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; white-space: nowrap;
}
.btn:hover { border-color: #c7cfdb; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.06); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.danger { color: var(--danger); }
.btn.wide { width: 100%; }

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 18px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 5;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.1rem; }
.actions { display: flex; align-items: center; gap: 6px; }
.actions form { margin: 0; }

.layout { display: grid; grid-template-columns: 1fr 320px; gap: 18px; padding: 18px; max-width: 1400px; margin: 0 auto; }
.calendar-wrap, .tasks { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.tasks h2 { font-size: 1rem; margin: 2px 0 10px; }
.task-list { list-style: none; margin: 0 0 12px; padding: 0; }
.task-list li { display: flex; align-items: flex-start; gap: 10px; padding: 8px 2px; border-bottom: 1px solid var(--line); }
.task-list li:last-child { border-bottom: 0; }
.task-list input[type=checkbox] { margin-top: 3px; width: 18px; height: 18px; flex: none; }
.task-body { all: unset; cursor: pointer; display: flex; flex-direction: column; gap: 2px; flex: 1; }
.task-title { font-weight: 500; }
.task-meta { color: var(--muted); font-size: .85rem; }
.task-list li.overdue .task-meta { color: var(--danger); }

/* FullCalendar */
.fc { --fc-border-color: var(--line); --fc-today-bg-color: var(--accent-soft); --fc-button-bg-color: var(--card);
      --fc-button-text-color: var(--text); --fc-button-border-color: var(--line); --fc-button-hover-bg-color: #eef1f6;
      --fc-button-hover-border-color: #c7cfdb; --fc-button-active-bg-color: var(--accent-soft);
      --fc-button-active-border-color: var(--accent); --fc-event-bg-color: var(--accent); --fc-event-border-color: var(--accent); }
.fc .fc-toolbar-title { font-size: 1.15rem; text-transform: capitalize; }
.fc .fc-button { text-transform: capitalize; box-shadow: none !important; }
.fc .fc-event.theirs { --fc-event-bg-color: var(--theirs); --fc-event-border-color: var(--theirs); }
.fc .fc-daygrid-event.theirs .fc-daygrid-event-dot { border-color: var(--theirs); }
.fc .fc-event.done { opacity: .55; text-decoration: line-through; }
.fc .fc-list-event.theirs .fc-list-event-dot { border-color: var(--theirs); }

dialog {
  border: 1px solid var(--line); border-radius: 14px; padding: 0; width: min(560px, calc(100vw - 24px));
  box-shadow: 0 20px 50px rgba(16, 24, 40, .18);
}
dialog::backdrop { background: rgba(16, 24, 40, .35); }
dialog form { padding: 18px 20px; display: flex; flex-direction: column; gap: 10px; }
dialog h2 { margin: 0 0 4px; font-size: 1.15rem; }
dialog label { display: flex; flex-direction: column; gap: 4px; font-size: .9rem; color: var(--muted); }
dialog label.check { flex-direction: row; align-items: center; gap: 8px; color: var(--text); }
dialog input:not([type=checkbox]):not([type=radio]), dialog select, dialog textarea {
  font: inherit; color: var(--text); padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: #fff;
}
dialog fieldset { border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px 10px; margin: 0; }
dialog legend { font-size: .9rem; color: var(--muted); padding: 0 4px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.row label { flex: 1; min-width: 120px; }
.segmented { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; align-self: flex-start; }
.segmented label { flex-direction: row; align-items: center; gap: 6px; padding: 6px 12px; color: var(--text); cursor: pointer; }
.segmented label:has(input:checked) { background: var(--accent-soft); color: var(--accent); }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips label { flex-direction: row; align-items: center; gap: 6px; border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; color: var(--text); cursor: pointer; }
.chips label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
#item-dialog[data-kind="event"] .only-task { display: none; }
#item-dialog[data-kind="task"] .only-event { display: none; }
.dialog-actions { display: flex; gap: 8px; align-items: center; margin-top: 6px; }
.spacer { flex: 1; }
.owner { margin: 0; font-size: .85rem; }
.telegram-box { display: flex; align-items: center; justify-content: space-between; gap: 10px; border: 1px dashed var(--line); border-radius: 8px; padding: 8px 10px; }

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: #1d2433; color: #fff;
  padding: 10px 16px; border-radius: 8px; z-index: 50; box-shadow: 0 8px 24px rgba(0, 0, 0, .2);
}

.login-page { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 32px 28px; width: min(380px, 100%); text-align: center; }
.login-card h1 { margin: 10px 0 4px; }
.login-card p { color: var(--muted); }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; padding: 10px; gap: 10px; }
  .topbar { padding: 8px 10px; }
}
@media (max-width: 480px) {
  .brand-text { display: none; }
  .actions { gap: 2px; }
  .topbar .btn { padding: 7px 10px; }
  .fc .fc-toolbar { flex-wrap: wrap; gap: 6px; }
  .fc .fc-toolbar-title { font-size: 1rem; }
}