.calendar {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
}

.calendar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.calendar-head h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-transform: capitalize;
}

.calendar-nav {
  display: flex;
  gap: 0.15rem;
}

.calendar-nav button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

.calendar-nav button:hover:not(:disabled) {
  background: var(--color-highlight);
}

.calendar-nav button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.calendar-nav svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.calendar-weekdays,
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.2rem;
}

.calendar-weekdays span {
  text-align: center;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: 0.35rem 0;
}

.calendar-day {
  aspect-ratio: 1;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
}

.calendar-day.is-muted,
.calendar-day.is-disabled {
  color: #c9bfb4;
  pointer-events: none;
}

.calendar-day.is-today {
  box-shadow: inset 0 0 0 1.5px var(--color-brand);
}

.calendar-day.is-selected {
  background: var(--color-brand);
  color: var(--color-text);
  box-shadow: none;
}

.calendar-day:not(.is-disabled):not(.is-muted):hover {
  background: var(--color-highlight);
}

.calendar-day.is-selected:hover {
  background: var(--color-brand-hover);
}

.slots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.55rem;
  margin-top: 0.25rem;
}

.slot-btn {
  min-height: 48px;
  border-radius: 999px;
  border: 1.5px solid var(--color-border);
  background: transparent;
  font-weight: 600;
  font-size: 0.92rem;
  transition: background var(--transition), border-color var(--transition);
}

.slot-btn:hover:not(:disabled) {
  border-color: var(--color-brand);
  background: var(--color-highlight);
}

.slot-btn.is-selected {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-text);
}

.slot-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.slots-empty {
  padding: 1.6rem 0.25rem;
  text-align: left;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

@media (min-width: 420px) {
  .slots-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}