body {
	margin: 0;
	font-family: Arial, Helvetica, sans-serif;
	background: linear-gradient(135deg, #4fa3ff, #1e81ce);
	min-height: 100vh;
	display: flex;
	flex-direction: column;
}

.header {
	width: 100%;
	background: rgba(0, 0, 0, 0.25);
	backdrop-filter: blur(4px);
	text-align: center;
	padding: 35px 0;
	margin-bottom: 30px;
}
.header img {
	width: 400px;
	height: auto;
}

.container {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 35px;
	width: 90%;
	max-width: 1500px;
	margin: 70px auto 40px auto;
	padding-bottom: 40px;
	flex-grow: 1;
}

.button-wrapper {
	text-align: center;
}

.btn {
	display: block;
	width: 100%;
	height: 100px;
	background-size: contain;
	background-position: center;
	background-repeat: no-repeat;
	background-color: #0d1b2a;
	padding: 6px;
	border-radius: 14px;
	border: 3px solid transparent;
	background-origin: border-box;
	background-clip: padding-box, border-box;
	background-image:
		linear-gradient(#0d1b2a, #0d1b2a),
		linear-gradient(135deg, #1e4d7b, #5fb3ff);
	box-shadow:
		inset 0 0 12px rgba(0, 0, 0, 0.55),
		0 4px 10px rgba(0, 0, 0, 0.35);
	transition: transform 0.2s ease, filter 0.25s, box-shadow 0.25s;
}

.btn:hover {
	transform: translateY(-5px);
	filter: brightness(1.15);
	box-shadow:
		inset 0 0 18px rgba(0, 0, 0, 0.7),
		0 6px 14px rgba(0, 0, 0, 0.45);
}


.btn:active {
	transform: translateY(1px);
}

.btn-label {
	margin-top: 10px;
	font-size: 20px;
	font-weight: bold;
	color: white;
	text-shadow: 0px 2px 4px rgba(0,0,0,0.6);
}

footer {
	background: rgba(0, 0, 0, 0.35);
	color: white;
	text-align: center;
	padding: 12px 0;
	font-size: 14px;
}

.extra-button-wrapper {
	text-align: center;
	margin: -10px auto 40px auto;
}

.btn-moodle {
	display: inline-block;
	width: 300px;
	height: 99px;
	background-size: contain;
	background-position: center;
	background-repeat: no-repeat;
	border-radius: 6px;
	box-shadow:
		0 4px 10px rgba(0, 0, 0, 0.3),
		0 2px 4px rgba(249, 128, 18, 0.4);
	transition: transform 0.2s ease, box-shadow 0.25s;
}

.btn-moodle:hover {
	transform: translateY(-3px);
	filter: brightness(1.1);
	box-shadow:
		0 6px 14px rgba(0, 0, 0, 0.35),
		0 3px 6px rgba(249, 128, 18, 0.5);
}

.btn-moodle:active {
	transform: translateY(1px);
}

.footer {
	display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    position: relative;
    min-height: 40px;
}

.footer p {
  font-size: 9px;
  margin-top: 7px;
  color: #c7c6c6;
}

.footer-logo {
	height: 40px;
	width: auto;
	position: absolute;
	left: 20px;
	top: 50%;
	transform: translateY(-50%);
}

@media (max-width: 1200px) {
	.container {
		grid-template-columns: repeat(3, 1fr);
		gap: 25px;
		margin-top: 50px;
	}
}

@media (max-width: 900px) {
	.container {
		grid-template-columns: repeat(2, 1fr);
		gap: 20px;
		margin-top: 40px;
	}

	.btn {
		height: 90px;
	}

	.btn-label {
		font-size: 18px;
	}
}

@media (max-width: 600px) {
	.container {
		grid-template-columns: 1fr;
		gap: 18px;
		margin-top: 30px;
	}

	.btn {
		height: 80px;
	}

	.btn-label {
		font-size: 16px;
	}
}