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

@media (min-width: 640px) {
	.surprise-calendar {
		grid-template-columns: repeat(3, 1fr);
	}
}

@media (min-width: 768px) {
	.surprise-calendar {
		grid-template-columns: repeat(4, 1fr);
		gap: 1.5rem;
	}
}

@media (min-width: 1024px) {
	.surprise-calendar {
		grid-template-columns: repeat(5, 1fr);
	}
}

.surprise-calendar__door {
	perspective: 1000px;
	cursor: pointer;
	aspect-ratio: 1 / 1;
}

.surprise-calendar__door-inner {
	position: relative;
	width: 100%;
	height: 100%;
	transition: transform 0.8s cubic-bezier(0.4, 0.2, 0.2, 1);
	transform-style: preserve-3d;
}

.surprise-calendar__door.is-open .surprise-calendar__door-inner,
.surprise-calendar__door--hover:hover .surprise-calendar__door-inner {
	transform: rotateY(180deg);
}

.surprise-calendar__door--locked.is-open .surprise-calendar__door-inner,
.surprise-calendar__door--locked:hover .surprise-calendar__door-inner {
	transform: none;
}

.surprise-calendar__door-front,
.surprise-calendar__door-back {
	position: absolute;
	width: 100%;
	height: 100%;
	backface-visibility: hidden;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-direction: column;
}

/* Front – unlocked */
.surprise-calendar__door-front {
	background: #ffffff;
	color: #901B62;
	border: 1px solid #e5e7eb;
	border-bottom: 3px solid #901B62;
	box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
	transition: background 0.3s, box-shadow 0.3s;
}

.surprise-calendar__door:not(.surprise-calendar__door--locked):hover .surprise-calendar__door-front {
	background: #fdf2f8;
	border-color: #901B62;
	box-shadow: 0 8px 15px rgba(144, 27, 98, 0.15);
}

/* Front – locked */
.surprise-calendar__door--locked {
	cursor: not-allowed;
	position: relative;
}

.surprise-calendar__door--locked .surprise-calendar__door-front {
	background: #f1f5f9;
	color: #94a3b8;
	border: 1px solid #e2e8f0;
	box-shadow: none;
}

/* Back */
.surprise-calendar__door-back {
	background: #901B62;
	color: #ffffff;
	transform: rotateY(180deg);
	padding: 1rem;
	text-align: center;
	border: 1px solid #901B62;
	transition: background 0.3s;
}

.surprise-calendar__door-back:hover {
	background: #7a1753;
}

/* Numbers */
.surprise-calendar__number--unlocked {
	font-size: 2.5rem;
	font-weight: 700;
	line-height: 1;
}

.surprise-calendar__number--locked {
	font-size: 1.75rem;
	font-weight: 300;
	line-height: 1;
}

/* Back inner */
.surprise-calendar__door-back-inner {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 0.5rem;
	width: 100%;
	height: 100%;
	padding: 0.75rem;
	text-align: center;
}

.surprise-calendar__description {
	color: rgba(255, 255, 255, 0.9);
	font-size: 0.8rem;
	line-height: 1.4;
	flex: 1;
	display: flex;
	align-items: center;
}

.surprise-calendar__link {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 0.4rem;
	width: 100%;
	height: 100%;
	color: #ffffff;
	text-decoration: none;
}

.surprise-calendar__link:hover .surprise-calendar__description,
.surprise-calendar__link:hover .surprise-calendar__title {
	text-decoration: underline;
	text-decoration-color: #ffffff;
	text-underline-offset: 3px;
}

.surprise-calendar__title {
	font-weight: 700;
	font-size: 0.85rem;
	text-align: center;
	line-height: 1.3;
}

.surprise-calendar__lock-icon {
	margin-top: 0.5rem;
	width: 1rem;
	height: 1rem;
}

/* Tooltip for locked doors */
.surprise-calendar__door--locked:not([data-tooltip-date=""])::after {
	content: attr(data-tooltip-text) "\A\A" "Öffnet am " attr(data-tooltip-date);
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	background: rgba(51, 65, 85, 0.92);
	color: #ffffff;
	font-size: 0.75rem;
	white-space: pre-line;
	text-align: center;
	padding: 0.35rem 0.7rem;
	pointer-events: none;
	opacity: 0;
	transition: opacity 0.5s ease;
	z-index: 10;
}

.surprise-calendar__door--locked:not([data-tooltip-date=""]):hover::after {
	opacity: 1;
}

/* Shake animation */
@keyframes sc-shake {
	0%, 100% { transform: translateX(0); }
	25% { transform: translateX(-4px); }
	75% { transform: translateX(4px); }
}

.surprise-calendar__door--shake {
	animation: sc-shake 0.3s ease-in-out;
}