:root {
  --mobile-bg: rgba(255, 255, 255, 0.05);
  --mobile-border: rgba(255, 255, 255, 0.12);
}

.desktop-calendar-section {
  display: block;
}

.mobile-calendar-shell {
  display: none;
  width: 100%;
  max-width: 100%;
  margin-top: 16px;
  padding: 16px;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.mobile-calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
}

.mobile-nav-btn {
  border: none;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04));
  border-radius: 12px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  box-shadow: 0 6px 18px rgba(3, 17, 40, 0.35);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.mobile-nav-btn:hover,
.mobile-nav-btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(3, 17, 40, 0.45);
}

.nav-icon {
  width: 12px;
  height: 12px;
  border: solid var(--text);
  border-width: 0 2px 2px 0;
  display: inline-block;
  transform: rotate(45deg);
  transition: border-color 180ms ease;
}

.mobile-nav-btn:hover .nav-icon,
.mobile-nav-btn:focus-visible .nav-icon {
  border-color: var(--primary);
}

.nav-icon.prev {
  transform: rotate(135deg);
}

.nav-icon.next {
  transform: rotate(-45deg);
}

.mobile-month-label {
  flex: 1;
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
}

.mobile-weekdays {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mobile-weekdays span {
  text-align: center;
}

.mobile-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
  transition: transform 250ms ease, opacity 250ms ease;
  transform: translateX(0);
}

.mobile-grid.is-transitioning {
  opacity: 0;
  pointer-events: none;
}

.mobile-grid[data-direction="next"].is-transitioning {
  transform: translateX(14px);
}

.mobile-grid[data-direction="prev"].is-transitioning {
  transform: translateX(-14px);
}

.mobile-day {
  border: 1px solid transparent;
  background: var(--mobile-bg);
  color: var(--text);
  border-radius: 14px;
  aspect-ratio: 1 / 1;
  padding: 6px;
  display: grid;
  place-content: center;
  position: relative;
  font-weight: 600;
  cursor: pointer;
  transition: transform 150ms ease, background 150ms ease;
}

.mobile-day:hover,
.mobile-day:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.25);
}

.mobile-day.is-selected {
  background: var(--primary);
  color: #0b111a;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.mobile-day.muted {
  opacity: 0.45;
}

.mobile-day.has-events::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  bottom: 6px;
  right: 6px;
}

.mobile-day.has-events {
  border-color: rgba(97, 218, 251, 0.4);
  box-shadow: inset 0 0 0 2px rgba(97, 218, 251, 0.2), 0 10px 20px rgba(0, 0, 0, 0.2);
  background: linear-gradient(180deg, rgba(97, 218, 251, 0.18), var(--mobile-bg));
}

.mobile-day-event-count {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  color: #0b111a;
  font-size: 0.65rem;
  font-weight: 700;
  display: grid;
  place-items: center;
  box-shadow: 0 0 12px rgba(97, 218, 251, 0.9);
  border: 2px solid rgba(255, 255, 255, 0.35);
}

.mobile-day.has-events::after {
  display: none;
}

.mobile-day.has-events {
  border-color: rgba(97, 218, 251, 0.4);
  box-shadow: inset 0 0 0 2px rgba(97, 218, 251, 0.2), 0 10px 20px rgba(0, 0, 0, 0.2);
  background: linear-gradient(180deg, rgba(97, 218, 251, 0.18), var(--mobile-bg));
}

.mobile-upcoming {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-upcoming-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.mobile-upcoming-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mobile-event-card {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 14px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--text);
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 120ms ease, border-color 120ms ease;
}

.mobile-event-card:hover,
.mobile-event-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.mobile-event-card-title {
  font-weight: 600;
  font-size: 1rem;
}

.mobile-event-card-time {
  display: inline-flex;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--muted);
}

.mobile-event-detail {
  position: fixed;
  inset: 0;
  display: none;
  background: rgba(0, 0, 0, 0.45);
  align-items: flex-end;
  justify-content: center;
  padding: 16px;
  z-index: 20;
}

.mobile-event-detail.is-open {
  display: flex;
}

.mobile-event-detail-card {
  width: min(420px, 100%);
  padding: 18px;
  border-radius: 20px;
}

.mobile-event-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.mobile-calendar-add {
  position: absolute;
  right: 16px;
  bottom: 16px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #0b111a;
  font-size: 26px;
  font-weight: 700;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform 150ms ease;
}

.mobile-calendar-add:hover,
.mobile-calendar-add:focus-visible {
  transform: scale(1.05);
}

.mobile-calendar-add[aria-hidden="true"] {
  display: none;
}

.mobile-calendar-shell::-webkit-scrollbar {
  display: none;
}

.mobile-upcoming-list .empty-state {
  text-align: center;
  color: var(--muted);
  padding: 18px 8px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
}

@media (max-width: 768px) {
  .desktop-calendar-section {
    display: none;
  }

  .mobile-calendar-shell {
    display: block;
    padding-bottom: 80px;
  }
}