:root {
  --vzn-picker-max-width: 310px;
  --vzn-picker-padding: 16px;
  --vzn-cell-font-size: 13px;
}

.date-range-picker-container {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 8px;
  box-sizing: border-box;
}

.date-range-picker {
  background: #ffffff;
  border: 1px solid #d9d9d9;
  width: 100%;
  max-width: var(--vzn-picker-max-width);
  padding: var(--vzn-picker-padding);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  box-sizing: border-box;
  position: relative;
  z-index: 9999;
}

.date-range-picker * {
  box-sizing: border-box;
}

.date-picker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.date-picker-nav {
  background: #ffffff;
  border: 1px solid #000000;
  color: #000000;
  cursor: pointer;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.date-picker-nav:hover:not(:disabled) {
  background: #000000;
  color: #ffffff;
}

.date-picker-nav:disabled {
  border-color: #d9d9d9;
  color: #b5b5b5;
  cursor: not-allowed;
}

.date-picker-selectors {
  display: flex;
  gap: 6px;
  flex: 1;
  justify-content: center;
  margin: 0 6px;
}

.select-wrapper {
  position: relative;
  width: 50%;
}

.select-wrapper::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid #000000;
  pointer-events: none;
}

.month-selector, .year-selector {
  width: 100%;
  padding: 6px 20px 6px 8px;
  border: 1px solid #747474;
  background-color: #ffffff;
  font-size: 13px;
  font-weight: 700;
  color: #000000;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  text-overflow: ellipsis;
}

.year-selector optgroup {
  font-weight: 700;
  color: #d8292f;
  background: #f6f6f6;
}

.calendar-grid, .calendar-days-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  row-gap: 2px;
}

.day-header {
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  color: #747474;
  padding-bottom: 6px;
  text-transform: uppercase;
}

.date-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--vzn-cell-font-size);
  font-weight: 700;
  color: #000000;
  background: transparent;
  cursor: pointer;
  aspect-ratio: 1;
  transition: all 0.1s ease;
  position: relative;
}

.date-cell:hover:not(.other-month):not(.disabled) {
  background-color: #f6f6f6;
  outline: 1px solid #000000;
}

.date-cell.other-month {
  color: #b5b5b5;
  pointer-events: none;
}

.date-cell.disabled {
  color: #d9d9d9;
  text-decoration: line-through;
  pointer-events: none;
  background-color: #f6f6f6;
  opacity: 0.6;
}

.date-cell.today {
  color: #d8292f;
  box-shadow: inset 0 0 0 2px #d8292f;
}

.date-cell.selected {
  background-color: #000000 !important;
  color: #ffffff !important;
}

.date-cell.selected.start {
  border-radius: 50% 0 0 50%;
}

.date-cell.selected.end {
  border-radius: 0 50% 50% 0;
}

.date-cell.selected.single-day {
  border-radius: 50% !important;
}

.date-cell.in-range {
  background-color: #f6f6f6;
  box-shadow: inset 0 -3px 0 0 #000000;
}

.date-cell.hover-range {
  background-color: #f6f6f6;
  box-shadow: inset 0 -3px 0 0 #d8292f;
}

.date-picker-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #d9d9d9;
  gap: 8px;
}

.date-picker-clear, .date-picker-apply {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid #000000;
  flex: 1;
  text-transform: uppercase;
}

.date-picker-clear {
  background-color: #ffffff;
  color: #000000;
}

.date-picker-apply {
  background-color: #000000;
  color: #ffffff;
}

.date-picker-apply:hover:not(:disabled) {
  background-color: #d8292f;
  border-color: #d8292f;
}

.date-picker-apply:disabled {
  background-color: #e2e2e2;
  border-color: #d9d9d9;
  color: #b5b5b5;
  cursor: not-allowed;
}

/* Intermediate Viewport Breakpoints (993px - 1100px Layout Guards) */
@media (max-width: 1100px) {
  :root {
    --vzn-picker-max-width: 300px;
  }
}

/* Mobile Layout Adaptive Sheets */
@media (max-width: 420px) {
  .date-range-picker {
    border-top: 4px solid #000000;
    box-shadow: 0 -10px 30px rgba(0,0,0,0.15);
  }
}