.app-shell.nav-collapsed {
  grid-template-columns: 84px 1fr;
}

.app-shell.nav-collapsed .product-lockup div,
.app-shell.nav-collapsed .nav-label {
  display: none;
}

.app-shell.nav-collapsed .product-lockup,
.app-shell.nav-collapsed .main-nav button,
.app-shell.nav-collapsed .user-menu-button {
  justify-content: center;
}

.app-shell.nav-collapsed .user-menu {
  left: calc(100% + 12px);
  right: auto;
  bottom: 0;
  width: 220px;
}

.app-shell.nav-collapsed .collapse-button {
  margin: 0 auto;
  transform: rotate(180deg);
}

@media (max-width: 1080px) {
  .app-shell {
    grid-template-columns: 84px 1fr;
  }

  .product-lockup div,
  .nav-label {
    display: none;
  }

  .product-lockup,
  .main-nav button,
  .user-menu-button {
    justify-content: center;
  }

  .user-menu {
    left: calc(100% + 12px);
    right: auto;
    bottom: 0;
    width: 220px;
  }

  .collapse-button {
    display: none;
  }
}

@media (max-width: 920px) {
  .calendar-layout {
    grid-template-columns: 1fr;
  }

  .calendar-side-panel {
    grid-template-columns: minmax(230px, 280px) minmax(0, 1fr);
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

}

@media (max-width: 820px) {
  .calendar-control-bar {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    justify-content: stretch;
    padding: 16px;
  }

  .calendar-title-group {
    min-width: 0;
  }

  .calendar-toolbar-actions {
    min-width: 0;
    justify-items: start;
    width: 100%;
  }

  .calendar-nav-controls,
  .calendar-view-switcher {
    width: 100%;
  }

  .calendar-nav-controls button,
  .calendar-view-switcher button {
    flex: 1 1 0;
  }

  .calendar-day-picker {
    grid-template-columns: repeat(7, minmax(64px, 1fr));
    overflow-x: auto;
  }

  .calendar-day-grid {
    min-width: 760px;
  }

  .calendar-week-grid {
    min-width: 960px;
  }

  .calendar-month-grid {
    min-width: 760px;
  }
}

@media (max-width: 720px) {
  .app-shell,
  .app-shell.nav-collapsed {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }

  .mobile-nav {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: 12px;
    z-index: 10;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 4px;
    padding: 8px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.18);
    backdrop-filter: blur(10px);
  }

  .mobile-nav > button,
  .mobile-user-menu-button {
    min-width: 0;
    min-height: 52px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: 14px;
    background: transparent;
    color: rgba(17, 24, 39, 0.62);
  }

  .mobile-nav > button.active {
    background: var(--panel-soft);
    color: var(--primary);
  }

  .mobile-nav.admin-mode {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .mobile-nav .nav-label {
    display: none;
  }

  .workspace {
    padding: 20px 16px 92px;
  }

  .calendar-workspace {
    border-radius: 14px;
  }

  .calendar-title-group h2 {
    font-size: 1.35rem;
  }

  .brand-block {
    align-items: flex-start;
    flex-direction: column;
  }

  .calendar-side-panel {
    display: none;
  }

  .calendar-toolbar-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    align-items: center;
  }

  .calendar-nav-controls {
    width: auto;
  }

  .calendar-day-picker {
    gap: 4px;
    padding: 10px 12px;
  }

  .calendar-day-picker button {
    min-height: 48px;
    border-radius: 10px;
  }

  .calendar-day-grid {
    min-width: 720px;
  }

  .calendar-week-grid {
    min-width: 760px;
  }

  .calendar-month-grid {
    min-width: 720px;
    min-height: 620px;
  }

  .split-view {
    grid-template-columns: 1fr;
  }
}