/* ═══════════════════════════════════════════════════════════════════
   УчОл — календарь (FullCalendar v6): дизайн-система УчОл.
   Module 5A: визуальный слой поверх существующего FullCalendar API.
   Классы/идентификаторы и поведение (drawer, popover, мини-календарь)
   сохранены; данные и фильтрация остаются в calendar_engine.js/API.
   ═══════════════════════════════════════════════════════════════════ */

/* ===== SPLIT LAYOUT ===== */
.gcal-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  align-items: start;
  gap: 16px;
  min-height: 0;
  margin: 0;
}

.gcal-sidebar {
  position: sticky;
  top: 16px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  max-height: calc(100vh - 120px);
  padding: 16px;
  overflow-y: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.gcal-main {
  min-width: 0;
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 4px 10px 10px;
}

/* ===== ADD BUTTON ===== */
.gcal-add-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  width: 100%;
  min-height: 44px;
  padding: 0 16px;
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--color-brand);
  color: var(--color-text-on-brand);
  font: 700 13px/1.2 var(--font-sans);
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 122, 255, .20);
  transition: background var(--motion-fast) var(--ease-standard),
              box-shadow var(--motion-fast) var(--ease-standard);
}
.gcal-add-btn:hover { background: var(--color-brand-strong); box-shadow: 0 6px 16px rgba(0, 122, 255, .24); }
.gcal-add-btn:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.gcal-add-btn .gcal-add-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .18);
  color: inherit;
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
}

/* ===== MINI CALENDAR ===== */
.gcal-mini { user-select: none; }
.gcal-mini-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 0 0 6px; }
.gcal-mini-title { color: var(--color-text-primary); font: 700 14px/1.3 var(--font-sans); letter-spacing: -.2px; }
.gcal-mini-nav {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}
.gcal-mini-nav:hover { background: var(--color-surface-muted); color: var(--color-text-primary); }
.gcal-mini-nav:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 1px; }

.gcal-mini-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  padding: 0 0 4px;
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.gcal-mini-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 2px; }
.gcal-mini-day {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-strong);
  font: 600 11.5px/1 var(--font-sans);
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}
.gcal-mini-day:hover { background: var(--color-surface-muted); }
.gcal-mini-day:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 1px; }
.gcal-mini-day.is-today { background: var(--color-brand); color: var(--color-text-on-brand); font-weight: 800; }
.gcal-mini-day.is-today:hover { background: var(--color-brand-strong); }
.gcal-mini-day.is-selected { background: var(--color-brand-soft); color: var(--color-brand-strong); font-weight: 800; }
.gcal-mini-day.is-other-month { color: var(--color-text-tertiary); opacity: .55; cursor: default; }
.gcal-mini-day.has-events::after {
  content: "";
  position: absolute;
  bottom: 3px;
  left: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-secondary);
  transform: translateX(-50%);
}
.gcal-mini-day.is-today.has-events::after { background: var(--color-text-on-brand); }

/* ===== LAYER FILTERS ===== */
.gcal-filters { display: flex; flex-direction: column; gap: 2px; }
.gcal-filters-label {
  padding: 0 0 6px 2px;
  color: var(--color-text-tertiary);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.gcal-filter {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 34px;
  padding: 5px 8px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  user-select: none;
  transition: background var(--motion-fast) var(--ease-standard);
}
.gcal-filter:hover { background: var(--color-surface-muted); }
.gcal-filter input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  flex: none;
  width: 17px;
  height: 17px;
  border: 1.5px solid var(--color-border-strong);
  border-radius: 5px;
  background: var(--color-surface);
  cursor: pointer;
  position: relative;
  transition: background var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard);
}
.gcal-filter input[type="checkbox"]:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.gcal-filter input[type="checkbox"]:checked { border-color: transparent; }
.gcal-filter input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/%3E%3C/svg%3E") center/13px no-repeat;
}
.gcal-filter input[type="checkbox"]#deadline-filter:checked { background: var(--color-danger-strong); }
.gcal-filter input[type="checkbox"]#stage-filter:checked { background: var(--color-brand); }
.gcal-filter input[type="checkbox"]#mandatory-filter:checked { background: var(--color-secondary); }
.gcal-filter input[type="checkbox"]#recommended-filter:checked { background: var(--color-track-conference); }
.gcal-filter input[type="checkbox"]#approved-filter:checked { background: var(--color-success-strong); }
.gcal-filter-dot { flex: none; width: 9px; height: 9px; border-radius: 3px; }
.gcal-filter-dot.deadline { background: var(--color-danger-strong); }
.gcal-filter-dot.stage { background: var(--color-brand); }
.gcal-filter-dot.mandatory { background: var(--color-secondary); }
.gcal-filter-dot.recommended { background: var(--color-track-conference); }
.gcal-filter-dot.approved { background: var(--color-success-strong); }
.gcal-filter-text { color: var(--color-text-strong); font-size: 13px; line-height: 1.3; }

.gcal-sidebar-footer {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
}
.gcal-sidebar-footer .gcal-popover-btn { width: 100%; }

/* ===== FULLCALENDAR WRAPPER (page calendar) ===== */
.gcal-main .fc {
  --fc-border-color: var(--color-border);
  --fc-button-bg-color: var(--color-surface);
  --fc-button-border-color: var(--color-border-strong);
  --fc-button-text-color: var(--color-text-strong);
  --fc-button-hover-bg-color: var(--color-surface-muted);
  --fc-button-hover-border-color: var(--color-brand-border);
  --fc-button-active-bg-color: var(--color-brand-soft);
  --fc-button-active-border-color: var(--color-brand-border);
  --fc-button-active-text-color: var(--color-brand-strong);
  --fc-today-bg-color: rgba(0, 122, 255, .06);
  --fc-event-bg-color: var(--color-brand);
  --fc-event-border-color: var(--color-brand);
  --fc-event-text-color: var(--color-text-on-brand);
  --fc-page-bg-color: var(--color-surface);
  --fc-neutral-bg-color: var(--color-surface);
  --fc-list-event-hover-bg-color: var(--color-surface-muted);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 13px;
}
.gcal-main .fc .fc-toolbar.fc-header-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: center;
  margin-bottom: 0 !important;
  padding: 12px 8px 10px;
  border-bottom: 1px solid var(--color-border);
}
.gcal-main .fc .fc-toolbar-title {
  color: var(--color-text-primary);
  font: 800 22px/1.2 var(--font-sans);
  letter-spacing: -.4px;
  text-transform: capitalize;
}
.gcal-main .fc .fc-button {
  min-height: 34px;
  height: 34px;
  padding: 0 11px;
  border-radius: var(--radius-sm);
  font: 600 12px/1 var(--font-sans);
  text-transform: none;
  letter-spacing: 0;
  box-shadow: none;
  transition: background var(--motion-fast) var(--ease-standard),
              border-color var(--motion-fast) var(--ease-standard),
              color var(--motion-fast) var(--ease-standard);
}
.gcal-main .fc .fc-button:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.gcal-main .fc .fc-button:active { transform: none; }
.gcal-main .fc .fc-today-button { border-color: transparent; background: transparent; color: var(--color-link); font-weight: 700; }
.gcal-main .fc .fc-today-button:hover { background: var(--color-brand-soft); border-color: transparent; }
.gcal-main .fc .fc-button-group { border-radius: var(--radius-sm); }
.gcal-main .fc .fc-button-group > .fc-button { border-radius: 0; margin-left: -1px; }
.gcal-main .fc .fc-button-group > .fc-button:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); margin-left: 0; }
.gcal-main .fc .fc-button-group > .fc-button:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.gcal-main .fc .fc-prev-button,
.gcal-main .fc .fc-next-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  padding: 0;
  border: 0;
  border-radius: 50% !important;
  background: transparent;
  color: var(--color-text-secondary);
}
.gcal-main .fc .fc-prev-button:hover,
.gcal-main .fc .fc-next-button:hover { background: var(--color-surface-muted); color: var(--color-text-primary); }
.gcal-main .fc .fc-icon { font-size: 1.15em; }

.gcal-main .fc .fc-col-header { border-bottom: 1px solid var(--color-border) !important; }
.gcal-main .fc .fc-col-header-cell { padding: 8px 0; background: var(--color-surface); border: 0 !important; }
.gcal-main .fc .fc-col-header-cell-cushion {
  padding: 0;
  color: var(--color-text-tertiary);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
}
.gcal-main .fc .fc-daygrid-day-number {
  padding: 5px 8px 0 0;
  color: var(--color-text-strong);
  font-size: 12px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.gcal-main .fc .fc-day-today .fc-daygrid-day-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin: 4px 4px 0 0;
  padding: 0;
  border-radius: 50%;
  background: var(--color-brand);
  color: var(--color-text-on-brand);
  font-weight: 800;
}
.gcal-main .fc .fc-daygrid-day-frame { min-height: 102px; }
.gcal-main .fc .fc-daygrid-day.fc-day-sat,
.gcal-main .fc .fc-daygrid-day.fc-day-sun { background: rgba(0, 0, 0, .02); }
.gcal-main .fc .fc-daygrid-event {
  margin: 1px 4px;
  padding: 2px 6px;
  border: 0;
  border-radius: 6px;
  color: var(--color-text-on-brand);
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1.35;
  cursor: pointer;
  transition: filter var(--motion-fast) var(--ease-standard);
}
.gcal-main .fc .fc-daygrid-event:hover { filter: brightness(.94); }
.gcal-main .fc .fc-daygrid-event:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 1px; }
.gcal-main .fc .fc-daygrid-event-harness { cursor: pointer; }
.gcal-main .fc .fc-event-title { font-weight: 600; }
.gcal-main .fc .fc-daygrid-more-link {
  margin: 1px 4px;
  padding: 1px 6px;
  border-radius: 5px;
  color: var(--color-link);
  font-size: 11px;
  font-weight: 700;
}
.gcal-main .fc .fc-daygrid-more-link:hover { background: var(--color-surface-muted); text-decoration: none; }
.gcal-main .fc .fc-timegrid-slot { height: 46px; border-bottom: 1px solid var(--color-border-subtle); }
.gcal-main .fc .fc-timegrid-slot-label { border: 0; }
.gcal-main .fc .fc-timegrid-slot-label-cushion { color: var(--color-text-tertiary); font-size: 10px; }
.gcal-main .fc .fc-timegrid-now-indicator-line { border-color: var(--color-danger-strong); }
.gcal-main .fc .fc-timegrid-now-indicator-arrow { border-color: var(--color-danger-strong); }
.gcal-main .fc .fc-list { border: 0 !important; }
.gcal-main .fc .fc-list-day-side-text { color: var(--color-text-strong); font-size: 12px; font-weight: 700; }
.gcal-main .fc .fc-list-event-graphic { display: none; }
.gcal-main .fc .fc-list-event-title { font-size: 13px; font-weight: 600; }
.gcal-main .fc .fc-list-event-time { color: var(--color-text-secondary); font-size: 12px; }
.gcal-main .fc .fc-list-table td { padding: 8px 12px; border: 0; }
.gcal-main .fc .fc-list-day-cushion { background: var(--color-surface-muted); }

/* Embedded dashboard calendars (same API, no sidebar) */
.student-calendar-embed .fc {
  --fc-border-color: var(--color-border);
  --fc-button-bg-color: var(--color-surface);
  --fc-button-border-color: var(--color-border-strong);
  --fc-button-text-color: var(--color-text-strong);
  --fc-button-hover-bg-color: var(--color-surface-muted);
  --fc-button-active-bg-color: var(--color-brand-soft);
  --fc-button-active-border-color: var(--color-brand-border);
  --fc-button-active-text-color: var(--color-brand-strong);
  --fc-today-bg-color: rgba(0, 122, 255, .06);
  --fc-page-bg-color: var(--color-surface);
  --fc-neutral-bg-color: var(--color-surface);
  font-family: var(--font-sans);
  font-size: 13px;
}
.student-calendar-embed .fc .fc-toolbar-title { color: var(--color-text-primary); font: 800 18px/1.2 var(--font-sans); letter-spacing: -.3px; }
.student-calendar-embed .fc .fc-button { min-height: 32px; height: 32px; border-radius: var(--radius-sm); font: 600 12px/1 var(--font-sans); text-transform: none; box-shadow: none; }
.student-calendar-embed .fc .fc-button:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.student-calendar-embed .fc .fc-col-header-cell-cushion { color: var(--color-text-tertiary); font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; }
.student-calendar-embed .fc .fc-daygrid-event { border: 0; border-radius: 6px; font-size: 11.5px; font-weight: 600; }
.student-calendar-embed .fc .fc-daygrid-event:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 1px; }

/* ===== EVENT POPOVER ===== */
.gcal-popover-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: var(--color-overlay);
  animation: gcal-fade-in var(--motion-fast) var(--ease-standard);
}
.gcal-popover {
  position: fixed;
  z-index: var(--z-modal);
  width: 360px;
  max-width: calc(100vw - 32px);
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-modal);
  animation: gcal-pop-in var(--motion-base) var(--ease-emphasized);
}
@keyframes gcal-fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes gcal-pop-in { from { opacity: 0; transform: scale(.96) translateY(-8px); } to { opacity: 1; transform: scale(1) translateY(0); } }
.gcal-popover-color-bar { width: 100%; height: 4px; }
.gcal-popover-header { display: flex; align-items: flex-start; justify-content: space-between; padding: 18px 18px 0; }
.gcal-popover-title { padding-right: 36px; color: var(--color-text-primary); font: 800 18px/1.3 var(--font-sans); letter-spacing: -.25px; }
.gcal-popover-close {
  position: absolute;
  top: 12px;
  right: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 17px;
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease-standard);
}
.gcal-popover-close:hover { background: var(--color-surface-muted); }
.gcal-popover-close:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.gcal-popover-body { padding: 10px 18px 18px; }
.gcal-popover-row { display: flex; align-items: center; gap: 10px; padding: 5px 0; color: var(--color-text-strong); font-size: 13px; line-height: 1.4; }
.gcal-popover-row .material-icon { flex: none; width: 20px; text-align: center; color: var(--color-text-secondary); font-size: 15px; }
.gcal-popover-status { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: var(--radius-pill); font-size: 12px; font-weight: 700; line-height: 1.4; }
.gcal-popover-status.is-approved { background: var(--color-success-bg); color: var(--color-success-text); }
.gcal-popover-status.is-pending { background: var(--color-warning-bg); color: var(--color-warning-text); }
.gcal-popover-status.is-rejected { background: var(--color-danger-bg); color: var(--color-danger-text); }
.gcal-popover-actions { display: flex; flex-direction: column; gap: 8px; margin-top: 14px; }
.gcal-popover-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: var(--radius-sm);
  font: 700 13px/1.2 var(--font-sans);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard);
}
.gcal-popover-btn:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.gcal-popover-btn.primary { background: var(--color-brand); color: var(--color-text-on-brand); box-shadow: 0 2px 8px rgba(0, 122, 255, .22); }
.gcal-popover-btn.primary:hover { background: var(--color-brand-strong); }
.gcal-popover-btn.outline { background: var(--color-surface); color: var(--color-text-strong); border: 1px solid var(--color-border-strong); }
.gcal-popover-btn.outline:hover { background: var(--color-surface-muted); border-color: var(--color-brand-border); }

/* ===== RESPONSIVE / DRAWER ===== */
.gcal-drawer-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: var(--color-brand);
  color: var(--color-text-on-brand);
  font-size: 19px;
  cursor: pointer;
  position: fixed;
  left: 16px;
  bottom: 20px;
  z-index: var(--z-toast);
  box-shadow: var(--shadow-md);
}
.gcal-drawer-toggle:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.gcal-drawer-overlay { display: none; }

@media (max-width: 1050px) {
  .gcal-shell { grid-template-columns: 248px minmax(0, 1fr); }
}

@media (max-width: 860px) {
  .gcal-shell { display: block; }
  .gcal-sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: var(--z-overlay);
    width: min(320px, calc(100vw - 40px));
    max-height: none;
    padding: 18px 16px;
    border: 0;
    border-right: 1px solid var(--color-border);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    box-shadow: var(--shadow-lg);
    transform: translateX(-100%);
    transition: transform var(--motion-slow) var(--ease-emphasized);
    overflow-y: auto;
  }
  .gcal-sidebar.is-open { transform: translateX(0); }
  .gcal-drawer-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-overlay) - 1);
    background: var(--color-overlay);
  }
  .gcal-drawer-overlay.is-visible { display: block; }
  .gcal-drawer-toggle { display: flex; }
  .gcal-sidebar > * { flex: none; min-width: 0; }
  .gcal-main { border-radius: var(--radius-lg); }
  .gcal-main .fc .fc-toolbar.fc-header-toolbar { gap: 6px; }
  .gcal-main .fc .fc-toolbar-title { font-size: 18px; }
  .gcal-main .fc .fc-button { min-height: 32px; height: 32px; padding: 0 9px; }
  .gcal-main .fc .fc-daygrid-day-frame { min-height: 84px; }
}

@media (max-width: 560px) {
  .gcal-main { padding: 0 4px 6px; }
  .gcal-main .fc .fc-toolbar.fc-header-toolbar { padding: 10px 4px 8px; }
  .gcal-main .fc .fc-toolbar-title { width: 100%; font-size: 17px; }
  .gcal-main .fc .fc-daygrid-day-frame { min-height: 72px; }
  .gcal-main .fc .fc-daygrid-event { margin: 1px 2px; padding: 1px 4px; font-size: 10.5px; }
  .gcal-main .fc .fc-daygrid-day-number { padding: 3px 5px 0 0; font-size: 11px; }
  .gcal-popover {
    right: 12px;
    bottom: 12px;
    left: 12px !important;
    top: auto !important;
    width: auto;
    max-width: none;
    border-radius: var(--radius-lg);
  }
}

/* Popover rows: typographic labels instead of emoji icons (Module 5A) */
.gcal-popover-row {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}
.gcal-popover-row::before {
  content: attr(data-label);
  padding-top: 2px;
  color: var(--color-text-tertiary);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
}
.gcal-popover-row > span { min-width: 0; overflow-wrap: anywhere; }

.gcal-filter-dot.admission { background: #7C3AED; }