* {
	box-sizing: border-box;
}

body {
	background-color: #1a1a1b;
	color: #d7dadc;
	font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
	margin: 0;
	padding: 1.25rem;
}

/*--------ヘッダ--------*/
header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	border-bottom: 1px solid #343536;
	padding-bottom: 1.25rem;
	margin-bottom: 1.875rem;
}

#title {
	font-size: 1.75rem;
	font-weight: bold;
}

#loginBtn {
	cursor: pointer;
	background-color: #4fbcff;
	color: #1a1a1b;
	border: none;
	padding: 0.625rem 1.25rem;
	border-radius: 4px;
	text-decoration: none;
	font-weight: bold;
}

/*--------ボディ--------*/
main {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(28.75rem, 1fr));
	gap: 1.25rem;
}

.app-card {
	background-color: #272729;
	border: 1px solid #343536;
	border-radius: 8px;
	padding: 1.25rem;
	transition: transform 0.2s;
	text-decoration: none;
	color: inherit;
	display: block;
}

.app-card:hover {
	transform: translateY(-0.3125rem);
	border-color: #4fbcff;
}

.app-card h2 {
	font-size: 1.25rem;
	font-weight: bold;
	margin-top: 0;
	color: #4fbcff;
}

.app-card p {
	font-size: 0.9375rem;
	margin: 10px;
}

.app-card-btn {
	display: inline-block;
	font-size: 0.85rem;
	color: #4fbcff;
	font-weight: bold;
	border: 1px solid #4fbcff;
	padding: 0.38rem 0.75rem;
	border-radius: 4px;
}

.app-card:hover .app-card-btn {
	background-color: #4fbcff;
	color: #1a1a1b;
}

/*--------ログイン--------*/
.modal {
	display: none;
	position: fixed;
	z-index: 1;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	background-color: rgba(0, 0, 0, 0.7);
}

.close-btn {
	cursor: pointer;
	position: absolute;
	right: 15px;
	top: 10px;
	font-size: 1.5rem;
}

.modal-content {
	position: relative;
	background-color: #272729;
	margin: 15% auto;
	padding: 1.25rem;
	border: 1px solid #4fbcff;
	width: 18.75rem;
	border-radius: 0.625rem;
	text-align: center;
}

.modal-content h2 {
	margin: 0.5rem;
}

#loginForm input {
	width: 90%;
	padding: 0.5rem;
	margin: 0.25rem 0;
	background-color: #1a1a1b;
	border: 1px solid #343536;
	color: white;
}

#submitBtn {
	cursor: pointer;
	background-color: #4fbcff;
	color: #1a1a1b;
	border: none;
	padding: 0.4rem 1rem;
	margin-top: 0.625rem;
	border-radius: 4px;
	text-decoration: none;
	font-weight: bold;
}

@media (max-width: 480px) {
	body {
		padding: 0.75rem;
	}

	header {
		padding-bottom: 1.0rem;
		margin-bottom: 1.25rem;
	}

	#title {
		font-size: 1.25rem;
	}

	#loginBtn {
		font-size: 0.9rem;
		padding: 0.65rem 0.75rem;
	}

	main {
		grid-template-columns: 1fr;
		gap: 1rem;
	}

	.app-card p {
		margin: 8px 0;
	}

	.modal-content {
		width: 85%;
		max-width: 320px;
		margin: 30% auto;
	}

	#loginForm input {
		width: 100%;
		box-sizing: border-box;
		font-size: 1rem;
		padding: 0.75rem;
	}
}