* {
margin: 0;
padding: 0;
box-sizing: border-box;
}

body {
font-family: 'Noto Sans JP', sans-serif;
background-color:#006699;
}

h1, h2, h3, .title {
font-family: 'M PLUS Rounded 1c', sans-serif;
color:#fff;
}


header {
position: fixed;
top: 0;
left: 0;
background-color: #6699FF;
color: #fff;
text-align:left;
display:flex;
width:100%;
height:70px;
z-index:100;
align-items: center;
}

header img{
display: block;
width:90px;
height:70px;
margin-left: 5px;
}


header .title {
font-size: 2rem;
margin-bottom: 0.5rem;
}

.hamburger {
width: 30px;
height: 20px;
position: relative;
cursor: pointer;
margin: 20px;
z-index: 1001;
}

.hamburger span {
position: absolute;
height: 3px;
width: 100%;
background: #333;
border-radius: 2px;
transition: all 0.3s ease;
}

.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 8px; }
.hamburger span:nth-child(3) { top: 16px; }


.nav-menu {
position: fixed;
top: 0;
right: -100%;
width: 200px;
height: 100%;
background-color:rgb(240,240,240);
color: #fff;
transition: right 0.3s ease;
padding-top: 60px;
z-index: 1000;
}

.nav-menu ul {
list-style: none;
padding: 0;
}

.nav-menu li {
text-align: center;
margin:12px;
height:43px;
align-items:center;
background-color:white;
border-right:7px solid rgb(150,150,150);
border-bottom:7px solid(200,200,200);
}

.nav-menu li a {
display: inline-block;
text-decoration: none;
color: black;
font-size: 20px;
font-family:monospace;
}


.nav-menu.active {
left: 0;
}


.hamburger.active span:nth-child(1) {
transform: rotate(45deg);
top: 8px;
}

.hamburger.active span:nth-child(2) {
opacity: 0;
}

.hamburger.active span:nth-child(3) {
transform: rotate(-45deg);
top: 8px;
}


.title{
text-align:center;

}
.title h1{
color:#fff
}

#space{
color:#006699;
}
.h3{
text-align:center;
margin-bottom:10px;
}
.top{
height:300px;
width:400px;
}
.section {
padding: 2rem;
margin: 1rem 0;
background-color: #000099;
border-radius: 8px;
color:white;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.sectionw{
height:120px;
}

.list{
text-align:center;
margin-top:30px;
}
.content{
text-align:center;
margin-top:30px;
}
footer {
text-align:center;
padding: 1rem;
background-color: #333;
color: #fff;
}

footer img{
width:50px;
height:50px;
}


@media (max-width: 768px) {
header nav ul li {
display: block;
margin-bottom: 10px;
}
img{
max-width:100%;
height:auto;
}
.section {
padding: 1rem;
}
header .title{
font-size:20px;
}
}