.bk-app {
	--bk-free: #2e7d4f;
	--bk-free-bg: #e4f3e9;
	--bk-busy: #b23b3b;
	--bk-busy-bg: #fbe6e6;
	--bk-chosen: #1f4f7a;
	--bk-chosen-bg: #dceafa;
	--bk-cta: #23693f;
	--bk-line: #dcdcd6;
	--bk-ink: #23262b;
	--bk-muted: #6b7079;
	--bk-radius: 6px;

	color: var(--bk-ink);
	max-width: 100%;
}

.bk-app *,
.bk-app *::before,
.bk-app *::after {
	box-sizing: border-box;
}

.bk-panel {
	margin: 0 0 1.75rem;
}

.bk-panel[hidden] {
	display: none;
}

/* Layout: kalenders links, samenvatting in de vierde kolom */
.bk-layout {
	display: grid;
	grid-template-columns: minmax(0, 3fr) minmax(230px, 1fr);
	gap: 1.75rem;
	align-items: start;
	margin-bottom: 1.75rem;
}

.bk-layout[hidden] {
	display: none;
}

.bk-layout .bk-panel {
	margin-bottom: 0;
	min-width: 0;
}

/* Toolbar */
.bk-toolbar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	margin-bottom: 1rem;
}

.bk-range-label {
	margin: 0;
	font-weight: 600;
	letter-spacing: 0.02em;
	text-align: center;
	flex: 1;
}

.bk-nav {
	width: 2.5rem;
	height: 2.5rem;
	font-size: 1.4rem;
	line-height: 1;
	background: #fff;
	border: 1px solid var(--bk-line);
	border-radius: var(--bk-radius);
	cursor: pointer;
	color: var(--bk-ink);
	flex: 0 0 auto;
}

.bk-nav:hover:not(:disabled) {
	border-color: var(--bk-ink);
}

.bk-nav:disabled {
	opacity: 0.35;
	cursor: not-allowed;
}

/* Maanden */
.bk-months {
	display: grid;
	grid-template-columns: repeat(var(--bk-months, 3), minmax(0, 1fr));
	gap: 1.25rem;
}

.bk-loading {
	grid-column: 1 / -1;
	margin: 0;
	padding: 2rem 0;
	text-align: center;
	color: var(--bk-muted);
}

.bk-month__title {
	margin: 0 0 0.65rem;
	font-size: 1rem;
	font-weight: 600;
	text-align: center;
	text-transform: capitalize;
}

.bk-grid {
	display: grid;
	grid-template-columns: repeat(7, 1fr);
	gap: 3px;
}

.bk-weekday {
	text-align: center;
	font-size: 0.7rem;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: var(--bk-muted);
	padding-bottom: 0.35rem;
}

.bk-day {
	display: flex;
	align-items: center;
	justify-content: center;
	aspect-ratio: 1 / 1;
	min-height: 2.1rem;
	padding: 0;
	font: inherit;
	font-size: 0.85rem;
	border: 1px solid transparent;
	border-radius: var(--bk-radius);
	background: transparent;
}

button.bk-day {
	cursor: pointer;
}

.bk-day--empty,
.bk-day--past {
	color: #b9bcc2;
	background: transparent;
}

.bk-day--free {
	background: var(--bk-free-bg);
	color: var(--bk-free);
	border-color: rgba(46, 125, 79, 0.25);
}

.bk-day--free:hover {
	border-color: var(--bk-free);
}

.bk-day--busy {
	background: var(--bk-busy-bg);
	color: var(--bk-busy);
	border-color: rgba(178, 59, 59, 0.25);
	cursor: default;
	text-decoration: line-through;
}

.bk-day--between {
	background: var(--bk-chosen-bg);
	color: var(--bk-chosen);
	border-color: rgba(31, 79, 122, 0.25);
	text-decoration: none;
}

.bk-day--start,
.bk-day--end {
	background: var(--bk-chosen);
	color: #fff;
	border-color: var(--bk-chosen);
	font-weight: 700;
	text-decoration: none;
}

.bk-day--start:hover,
.bk-day--end:hover {
	filter: brightness(1.3);
}

.bk-day:focus-visible {
	outline: 2px solid var(--bk-ink);
	outline-offset: 1px;
}

/* Legenda */
.bk-legend {
	display: flex;
	flex-wrap: wrap;
	gap: 1.25rem;
	list-style: none;
	margin: 1.25rem 0 0;
	padding: 0;
	font-size: 0.85rem;
	color: var(--bk-muted);
}

.bk-legend li {
	display: flex;
	align-items: center;
	gap: 0.45rem;
	margin: 0;
}

.bk-swatch {
	width: 0.9rem;
	height: 0.9rem;
	border-radius: 3px;
	display: inline-block;
}

.bk-swatch--free {
	background: var(--bk-free-bg);
	border: 1px solid var(--bk-free);
}

.bk-swatch--busy {
	background: var(--bk-busy-bg);
	border: 1px solid var(--bk-busy);
}

.bk-swatch--chosen {
	background: var(--bk-chosen);
	border: 1px solid var(--bk-chosen);
}

/* Samenvatting */
.bk-panel--summary {
	position: sticky;
	top: 1.5rem;
}

.bk-hint {
	margin: 0 0 1rem;
	color: var(--bk-muted);
	font-size: 0.9rem;
}

.bk-selection {
	border: 1px solid var(--bk-line);
	border-radius: var(--bk-radius);
	padding: 1.25rem;
	background: #fff;
}

.bk-dates {
	display: grid;
	gap: 0.65rem;
	padding-bottom: 1rem;
	border-bottom: 1px solid var(--bk-line);
}

.bk-date {
	display: flex;
	align-items: baseline;
	justify-content: space-between;
	gap: 0.75rem;
}

.bk-date__label {
	font-size: 0.75rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--bk-muted);
	flex: 0 0 auto;
}

.bk-date__value {
	font-size: 1rem;
	text-align: right;
}

.bk-date__arrow {
	display: none;
}

.bk-costs {
	margin: 1rem 0 1.25rem;
}

.bk-costs__row {
	display: flex;
	justify-content: space-between;
	gap: 1rem;
	padding: 0.3rem 0;
}

.bk-costs dt,
.bk-costs dd {
	margin: 0;
}

.bk-costs__row--total {
	border-top: 1px solid var(--bk-line);
	margin-top: 0.5rem;
	padding-top: 0.75rem;
	font-weight: 700;
	font-size: 1.1rem;
}

/* Knoppen */
.bk-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75rem;
}

.bk-panel--summary .bk-actions {
	flex-direction: column;
}

.bk-panel--summary .bk-button {
	width: 100%;
}

.bk-button {
	font: inherit;
	padding: 0.7rem 1.4rem;
	border-radius: var(--bk-radius);
	border: 1px solid transparent;
	cursor: pointer;
}

.bk-button--primary {
	background: var(--bk-chosen);
	color: #fff;
}

.bk-button--primary:hover:not(:disabled) {
	filter: brightness(1.1);
}

.bk-button--primary:disabled {
	opacity: 0.45;
	cursor: not-allowed;
}

.bk-request-open.bk-button--primary,
.bk-submit.bk-button--primary {
	background: var(--bk-cta);
	border-color: var(--bk-cta);
}

.bk-button--ghost {
	background: transparent;
	border-color: var(--bk-line);
	color: var(--bk-ink);
}

.bk-button--ghost:hover {
	border-color: var(--bk-ink);
}

/* Formulier */
.bk-panel--form {
	border: 1px solid var(--bk-line);
	border-radius: var(--bk-radius);
	padding: 1.5rem;
	background: #fff;
}

.bk-form__title {
	margin: 0 0 0.5rem;
}

.bk-form__intro {
	margin: 0 0 1rem;
	color: var(--bk-muted);
}

.bk-form__recap {
	display: flex;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 0.5rem;
	padding: 0.85rem 1rem;
	margin-bottom: 1.5rem;
	background: var(--bk-chosen-bg);
	border-radius: var(--bk-radius);
	font-weight: 600;
}

.bk-form__grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 1rem;
}

.bk-field {
	display: flex;
	flex-direction: column;
	gap: 0.3rem;
	font-size: 0.9rem;
}

.bk-field--wide {
	grid-column: 1 / -1;
}

.bk-field em {
	font-style: normal;
	color: var(--bk-busy);
}

.bk-field input,
.bk-field textarea {
	font: inherit;
	padding: 0.6rem 0.7rem;
	border: 1px solid var(--bk-line);
	border-radius: var(--bk-radius);
	background: #fff;
	color: var(--bk-ink);
	width: 100%;
}

.bk-field input:focus,
.bk-field textarea:focus {
	outline: none;
	border-color: var(--bk-chosen);
}

.bk-invalid {
	border-color: var(--bk-busy) !important;
}

.bk-honeypot {
	position: absolute;
	left: -9999px;
	height: 0;
	overflow: hidden;
}

.bk-message {
	margin: 1.25rem 0 0;
	min-height: 1.2em;
	color: var(--bk-muted);
}

.bk-panel--form .bk-actions {
	margin-top: 1.75rem;
	padding-top: 1.5rem;
	border-top: 1px solid var(--bk-line);
}

.bk-message--error {
	color: var(--bk-busy);
	font-weight: 600;
}

/* Bevestiging */
.bk-panel--success {
	border: 1px solid var(--bk-free);
	border-left-width: 4px;
	border-radius: var(--bk-radius);
	padding: 1.5rem;
	background: var(--bk-free-bg);
}

.bk-panel--success h3 {
	margin: 0 0 0.5rem;
	color: var(--bk-free);
}

@media (max-width: 1100px) {
	.bk-layout {
		grid-template-columns: minmax(0, 1fr);
	}

	.bk-panel--summary {
		position: static;
	}

	.bk-panel--summary .bk-actions {
		flex-direction: row;
	}

	.bk-panel--summary .bk-button {
		width: auto;
	}
}

@media (max-width: 780px) {
	.bk-app:not([data-months="1"]):not([data-months="2"]) {
		--bk-months: 2;
	}
}

@media (max-width: 560px) {
	.bk-app {
		--bk-months: 1;
	}

	.bk-months {
		gap: 1.75rem;
	}
}

@media (max-width: 600px) {
	.bk-form__grid {
		grid-template-columns: 1fr;
	}

	.bk-actions .bk-button {
		flex: 1 1 100%;
	}
}

@media (prefers-reduced-motion: reduce) {
	.bk-app * {
		scroll-behavior: auto !important;
	}
}