body {
font-family: 'Arial', sans-serif;
background-color: #f7f7f7;
color: #333;
margin: 0;
padding: 0;
}
header {
	background-color: #85b78b;
	color: white;
	padding: 20px 0;
	text-align: center;
}

nav ul {
list-style: none;
padding: 0;
display: flex;
justify-content: center;
}

nav ul li {
margin: 0 15px;
}

nav ul li a {
color: white;
text-decoration: none;
font-weight: bold;
}

h1 {
margin: 0;
font-size: 2.5em;
}

main {
max-width: 900px;
margin: 20px auto;
padding: 20px;
}

h2 {
color: #85b78b;
font-size: 2em;
}

p {
font-size: 1.1em;
line-height: 1.5;
}

article {
background-color: white;
padding: 15px;
border-radius: 8px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
margin-bottom: 20px;
}

footer {
	background-color: #85b78b;
	color: white;
	text-align: center;
	padding: 10px 0;
}
.admax{
	margin: 10px auto;
	text-align: center;
}
.youtube{
	width: 100%;
	aspect-ratio: 16 / 9;
}
.youtube iframe{
	width: 100%;
	height: 100%;
}
.str_bold{
	font-weight: bold;
}

.pc{
	display: block;
}
.sp{
	display: none;
}
@media (max-width: 720px) {
	main {
		padding: 10px;
	}
	.pc{
		display: none;
	}
	.sp{
		display: block;
	}
}