/**
 * Calendar Datepicker Styles
 *
 * Self-contained stylesheet for the ATBCalendar component. All selectors are
 * scoped under `.atb-calendar` to prevent style leakage. The calendar inherits
 * custom properties from `.atb-booking-widget` when nested inside the widget,
 * but also defines its own defaults so it can render standalone.
 *
 * @package AmazonToursBooking
 * @since   2.0.0
 */

/* ==========================================================================
   1. Calendar Custom Properties (defaults)
   ========================================================================== */

.atb-calendar {
	--atb-color-primary: #2d6a4f;
	--atb-color-primary-light: #d8f3dc;
	--atb-color-joinable: #b7e4c7;
	--atb-color-unavailable: #e9ecef;
	--atb-color-unavailable-text: #adb5bd;
	--atb-color-selected-text: #ffffff;
	--atb-radius: 6px;

	width: 100%;
	box-sizing: border-box;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

.atb-calendar *,
.atb-calendar *::before,
.atb-calendar *::after {
	box-sizing: border-box;
}

/* ==========================================================================
   2. Header — month/year title + navigation arrows
   ========================================================================== */

.atb-calendar__header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 8px 0;
	margin-bottom: 8px;
}

.atb-calendar__title {
	font-size: 1.05rem;
	font-weight: 600;
	color: inherit;
	user-select: none;
}

.atb-calendar__nav {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 36px;
	height: 36px;
	padding: 0;
	margin: 0;
	border: 1px solid var(--atb-color-unavailable);
	border-radius: var(--atb-radius);
	background: transparent;
	color: inherit;
	font-size: 1.3rem;
	line-height: 1;
	cursor: pointer;
	transition: background-color 0.15s ease, border-color 0.15s ease;
	-webkit-appearance: none;
	-moz-appearance: none;
	appearance: none;
}

.atb-calendar__nav:hover:not(:disabled) {
	background-color: var(--atb-color-primary-light);
	border-color: var(--atb-color-primary);
}

.atb-calendar__nav:disabled {
	opacity: 0.35;
	cursor: not-allowed;
}

/* ==========================================================================
   3. Weekday Headers — Mon through Sun
   ========================================================================== */

.atb-calendar__weekdays {
	display: grid;
	grid-template-columns: repeat(7, 1fr);
	gap: 2px;
	margin-bottom: 4px;
}

.atb-calendar__weekday {
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 4px 0;
	font-size: 0.75rem;
	font-weight: 600;
	text-transform: uppercase;
	color: var(--atb-color-unavailable-text);
	letter-spacing: 0.02em;
	user-select: none;
}

/* ==========================================================================
   4. Day Grid — CSS Grid 7-column layout
   ========================================================================== */

.atb-calendar__grid {
	display: grid;
	grid-template-columns: repeat(7, 1fr);
	gap: 2px;
	position: relative;
	min-height: 200px;
}

/* ==========================================================================
   5. Day Cells — base styles
   ========================================================================== */

.atb-calendar__day {
	aspect-ratio: 1;
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 40px;
	border-radius: var(--atb-radius);
	cursor: pointer;
	position: relative;
	font-size: 0.9rem;
	font-weight: 400;
	line-height: 1;
	color: inherit;
	background: transparent;
	transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
	user-select: none;
	outline: none;
}

.atb-calendar__day:focus-visible {
	box-shadow: 0 0 0 2px var(--atb-color-primary);
}

/* ==========================================================================
   6. Day States
   ========================================================================== */

/* -- Available (default clickable day) ------------------------------------ */

.atb-calendar__day--available {
	cursor: pointer;
}

.atb-calendar__day--available:hover {
	background-color: var(--atb-color-primary-light);
}

/* -- Unavailable (greyed out, non-interactive) ---------------------------- */

.atb-calendar__day--unavailable {
	background-color: var(--atb-color-unavailable);
	color: var(--atb-color-unavailable-text);
	cursor: default;
	pointer-events: none;
}

/* -- Past (same as unavailable) ------------------------------------------- */

.atb-calendar__day--past {
	background-color: var(--atb-color-unavailable);
	color: var(--atb-color-unavailable-text);
}

/* -- Full (unavailable with strikethrough) -------------------------------- */

.atb-calendar__day--full {
	background-color: var(--atb-color-unavailable);
	color: var(--atb-color-unavailable-text);
	text-decoration: line-through;
}

/* -- Joinable (green accent, clickable) ----------------------------------- */

.atb-calendar__day--joinable {
	background-color: var(--atb-color-joinable);
	color: #1b4332;
	cursor: pointer;
	font-weight: 500;
}

.atb-calendar__day--joinable:hover {
	background-color: #95d5b2;
}

/* -- Selected (primary accent, white text) -------------------------------- */

.atb-calendar__day--selected {
	background-color: var(--atb-color-primary) !important;
	color: var(--atb-color-selected-text) !important;
	font-weight: 600;
}

/* -- Today (inset ring) --------------------------------------------------- */

.atb-calendar__day--today {
	box-shadow: inset 0 0 0 2px var(--atb-color-primary);
}

/* Override today ring when selected */
.atb-calendar__day--today.atb-calendar__day--selected {
	box-shadow: inset 0 0 0 2px var(--atb-color-selected-text);
}

/* -- Empty placeholder (invisible) ---------------------------------------- */

.atb-calendar__day--empty {
	background: transparent;
	pointer-events: none;
	cursor: default;
}

/* ==========================================================================
   7. Capacity Badge — remaining spots indicator on joinable slot start dates
   ========================================================================== */

.atb-calendar__badge {
	position: absolute;
	top: 2px;
	right: 2px;
	background: var(--atb-color-primary, #2d6a4f);
	color: #fff;
	font-size: 0.6rem;
	font-weight: 700;
	width: 16px;
	height: 16px;
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	line-height: 1;
	pointer-events: none;
}

/* ==========================================================================
   8. CSS-only Tooltip — "X spots remaining" on joinable days
   ========================================================================== */

.atb-calendar__day--joinable[data-tooltip]::after {
	content: attr(data-tooltip);
	position: absolute;
	bottom: calc(100% + 6px);
	left: 50%;
	transform: translateX(-50%);
	background: #333;
	color: #fff;
	padding: 4px 10px;
	border-radius: 4px;
	font-size: 0.75rem;
	white-space: nowrap;
	opacity: 0;
	pointer-events: none;
	transition: opacity 0.15s ease;
	z-index: 10;
}

.atb-calendar__day--joinable[data-tooltip]:hover::after,
.atb-calendar__day--joinable[data-tooltip]:focus::after {
	opacity: 1;
}

/* ==========================================================================
   9. Existing Slot Range Highlighting — subtle background band for active slots
   ========================================================================== */

.atb-calendar__day--slot-range {
	position: relative;
	z-index: 1;
}

.atb-calendar__day--slot-range::before {
	content: '';
	position: absolute;
	top: 4px;
	bottom: 4px;
	left: -1px;
	right: -1px;
	background: var(--atb-color-joinable, #b7e4c7);
	opacity: 0.35;
	z-index: -1;
	border-radius: 0;
}

.atb-calendar__day--slot-range-start::before {
	left: 4px;
	border-radius: var(--atb-radius, 6px) 0 0 var(--atb-radius, 6px);
}

.atb-calendar__day--slot-range-end::before {
	right: 4px;
	border-radius: 0 var(--atb-radius, 6px) var(--atb-radius, 6px) 0;
}

.atb-calendar__day--slot-range-start.atb-calendar__day--slot-range-end::before {
	left: 4px;
	right: 4px;
	border-radius: var(--atb-radius, 6px);
}

/* ==========================================================================
   10. Selected Date Range Highlighting — primary-light background for tour duration
   ========================================================================== */

.atb-calendar__day--range {
	position: relative;
	z-index: 1;
}

.atb-calendar__day--range::before {
	content: '';
	position: absolute;
	top: 4px;
	bottom: 4px;
	left: -1px;
	right: -1px;
	background: var(--atb-color-primary-light, #d8f3dc);
	z-index: -1;
	border-radius: 0;
}

.atb-calendar__day--range-start::before {
	left: 4px;
	border-radius: var(--atb-radius, 6px) 0 0 var(--atb-radius, 6px);
}

.atb-calendar__day--range-end::before {
	right: 4px;
	border-radius: 0 var(--atb-radius, 6px) var(--atb-radius, 6px) 0;
}

.atb-calendar__day--range-start.atb-calendar__day--range-end::before {
	left: 4px;
	right: 4px;
	border-radius: var(--atb-radius, 6px);
}

/* ==========================================================================
   11. Range Priority — selected range overrides slot range when both apply
   ========================================================================== */

.atb-calendar__day--range.atb-calendar__day--slot-range::before {
	background: var(--atb-color-primary-light, #d8f3dc);
	opacity: 1;
}

/* ==========================================================================
   12. Loading State — overlay with spinner
   ========================================================================== */

.atb-calendar__grid--loading {
	pointer-events: none;
}

.atb-calendar__grid--loading::after {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: rgba(255, 255, 255, 0.65);
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 5;
	border-radius: var(--atb-radius);
}

.atb-calendar__grid--loading::before {
	content: '';
	position: absolute;
	top: 50%;
	left: 50%;
	width: 28px;
	height: 28px;
	margin: -14px 0 0 -14px;
	border: 3px solid var(--atb-color-unavailable);
	border-top-color: var(--atb-color-primary);
	border-radius: 50%;
	animation: atb-calendar-spin 0.7s linear infinite;
	z-index: 6;
}

@keyframes atb-calendar-spin {
	to {
		transform: rotate(360deg);
	}
}

/* ==========================================================================
   13. Responsive — compact mode for small screens
   ========================================================================== */

@media (max-width: 480px) {
	.atb-calendar {
		padding: 12px;
	}

	.atb-calendar__day {
		min-height: 34px;
		font-size: 0.78rem;
		border-radius: 4px;
	}

	.atb-calendar__title {
		font-size: 0.9rem;
	}

	.atb-calendar__nav {
		width: 30px;
		height: 30px;
		font-size: 1.1rem;
	}

	.atb-calendar__weekday {
		font-size: 0.65rem;
		padding-bottom: 4px;
	}

	/* Badge: smaller on mobile */
	.atb-calendar__badge {
		width: 13px;
		height: 13px;
		font-size: 0.5rem;
	}

	/* Tooltip: below cell on mobile to avoid clipping at top of calendar */
	.atb-calendar__day--joinable[data-tooltip]::after {
		bottom: auto;
		top: calc(100% + 6px);
		font-size: 0.65rem;
		padding: 3px 6px;
	}
}