.date-picker {
  position: fixed;
  background: var(--color-link);
  border: 1px solid var(--color-link);
  border-radius: 0.5rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  z-index: 1000;
  min-width: 350px;
  font-family: inherit;
  padding: 16px;
  font-size: 14px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  color: white;
  display: none;
}

.date-picker--open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  display: block;
}

.date-picker__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0 1rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.date-picker__title {
  flex: 1;
  text-align: center;
}

.date-picker__month {
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  color: white;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.25rem;
  transition: background-color 0.15s ease;
}

.date-picker__month:hover {
  background: rgba(255, 255, 255, 0.2);
}

.date-picker__nav {
  background: none;
  border: none;
  width: 32px;
  height: 32px;
  padding: 0.5rem;
  border-radius: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: white;
  transition: all 0.15s ease;
}

.date-picker__nav:hover {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.date-picker__nav:active {
  transform: scale(0.95);
}

.date-picker__nav-icon {
  font-size: 1.25rem;
  font-weight: bold;
  color: white;
}

/* Weekdays */
.date-picker__weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.125rem;
  background: transparent;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  margin-bottom: 0.5rem;
}

.date-picker__weekday {
  text-align: center;
  padding: 0.75rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Days */
.date-picker__days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.125rem;
  padding: 0.5rem 0;
}

.date-picker__day {
  aspect-ratio: 1;
  background: none;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: white;
  transition: all 0.15s ease;
  position: relative;
}

.date-picker__day:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

.date-picker__day:active:not(:disabled) {
  transform: scale(0.95);
}

.date-picker__day--other-month {
  color: rgba(255, 255, 255, 0.4);
}

.date-picker__day--today {
  background: rgba(255, 255, 255, 0.3) !important;
  color: white !important;
  font-weight: 600;
  border: 2px solid white !important;
  border-radius: 50% !important;
}

.date-picker__day--today:hover {
  background: rgba(255, 255, 255, 0.4) !important;
}

.date-picker__day--selected {
  background: #ffd700 !important;
  color: #2c3e50 !important;
  font-weight: 700;
  border-radius: 50% !important;
}

.date-picker__day--selected:hover {
  background: #ffed4e !important;
}

.date-picker__day--disabled {
  color: rgba(255, 255, 255, 0.3);
  cursor: not-allowed;
  opacity: 0.5;
}

.date-picker__day--disabled:hover {
  background: none;
  transform: none;
}

/* Footer */
.date-picker__footer {
  display: flex;
  gap: 0.5rem;
  justify-content: space-between;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.date-picker__btn {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: white;
  padding: 0.375rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  flex: 1;
}

.date-picker__btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: white;
  color: white;
}

.date-picker__btn:active {
  transform: scale(0.98);
}

.date-picker__btn--today {
  color: white;
  border-color: white;
  font-weight: 600;
}

.date-picker__btn--today:hover {
  background: white;
  color: var(--color-link);
}

.date-picker__btn--clear {
  color: white;
  border-color: rgba(255, 255, 255, 0.5);
}

.date-picker__btn--clear:hover {
  background: rgba(255, 0, 0, 0.2);
  border-color: white;
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
  .date-picker {
    background: var(--color-link);
    border-color: var(--color-link);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  }
}

/* Animation for month transitions */
@keyframes datePickerSlideIn {
  from {
    opacity: 0;
    transform: translateX(-4px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.date-picker__days {
  animation: datePickerSlideIn 0.2s ease-out;
}

/* Focus styles for accessibility */
.date-picker__day:focus,
.date-picker__nav:focus,
.date-picker__month:focus,
.date-picker__btn:focus {
  outline: 2px solid white;
  outline-offset: 2px;
}

/* Responsive adjustments */
@media (max-width: 480px) {
  .date-picker {
    min-width: calc(100vw - 32px);
    max-width: calc(100vw - 32px);
  }
  
  .date-picker__day {
    font-size: 0.85rem;
  }
}