*{margin: 0; padding: 0;}
body{background-color: white;}


.trans
{
	transition: all 1s ease;
	-moz-transition: all 1s ease;
	-ms-transition: all 1s ease;
	-o-transition: all 1s ease;
	-webkit-transition: all 1s ease;
}
.top
{
	display: flex;
	width: 80vw;
	/* height: 120vh; */
	margin-top: 10vh;
	margin-left: auto;
	margin-right: auto;
	margin-bottom: 10vh;
    height: 110vh; /* ✅ height fixed করে দিলে responsive-এ overlap হয় */

}
.top ul
{
	list-style: none;
	width: 100%;
	height: 100%;
	z-index: 1;
	box-sizing: border-box;
}
.top ul li
{
	position: relative;
	float: left;
	width: 25%;
	height: 25%;
	overflow: hidden;
}

.top ul li::before
{
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-color: #000;
	content: '';
	color: white;
	opacity: 0.4;
	text-align: center;
	box-sizing: border-box;
	pointer-events: none;
	transition: all 0.5s ease;
	-moz-transition: all 0.5s ease;
	-ms-transition: all 0.5s ease;
	-o-transition: all 0.5s ease;
	-webkit-transition: all 0.5s ease;
}
.top ul li:hover::before
{
	opacity: 0;
	background-color: rgba(0,0,0,0.90);
}
.top ul li img
{
	width: 100%;
	height: auto;
	overflow: hidden;
}
.lightbox
{
	position: fixed;
	width: 100%;
	height: 100%;
	text-align: center;
	top: 0;
	left: 0;
	background-color: rgba(0,0,0,0.75);
	z-index: 999;
	opacity: 0;
	pointer-events: none;
}
.lightbox img
{
	max-width: 90%;
	max-height: 80%;
	position: relative;
	top: -100%;
	/* Transition */
	transition: all 1s ease;
	-moz-transition: all 1s ease;
	-ms-transition: all 1s ease;
	-o-transition: all 1s ease;
	-webkit-transition: all 1s ease;
}
.lightbox:target
{
	outline: none;
	top: 0;
	opacity: 1;
	pointer-events: auto;
	transition: all 1.2s ease;
	-moz-transition: all 1.2s ease;
	-ms-transition: all 1.2s ease;
	-o-transition: all 1.2s ease;
	-webkit-transition: all 1.2s ease;
}
.lightbox:target img
{
	top: 0;
	top: 50%;
	transform: translateY(-50%);
	-moz-transform: translateY(-50%);
	-ms-transform: translateY(-50%);
	-o-transform: translateY(-50%);
	-webkit-transform: translateY(-50%);
}



.top ul {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	padding: 10px;
	box-sizing: border-box;
	justify-content: center;
}

.top ul li {
	width: calc(25% - 10px);
	position: relative;
	overflow: hidden;
}

.top ul li img {
	width: 100%;
	height: auto;
	display: block;
}




/* ===== Responsive Breakpoints ===== */
@media (max-width: 992px) {
	.top ul li {
		width: calc(33.33% - 10px); /* 3 columns */
	}
}

@media (max-width: 768px) {
	.top ul li {
		width: calc(50% - 10px); /* 2 columns */
	}
}

@media (max-width: 480px) {
	.top ul li {
		width: 100%; /* 1 column */
	}
}





.top {
	width: 80vw;
	margin: 10vh auto;
	display: flex;
	flex-wrap: wrap;
	height: 150vh; /* ✅ ডেক্সটপে নির্দিষ্ট উচ্চতা */
}

/* মোবাইল ও ট্যাব ডিভাইসে height:auto করবো */
@media (max-width: 992px) {
	.top {
		height: auto; /* ✅ মোবাইলে কনটেন্ট অনুযায়ী height */
	}
}