@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@100..900&display=swap');
* {
    font-family: "Noto Sans JP", serif;
    box-sizing: border-box;
    font-feature-settings: "palt";
}

.header {
    border-bottom: 1.5px solid #eee;
}
.header .container {
    width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
}
.header .logo a {
    display: flex;
    align-items: center;
    font-size: 1.15rem;
    font-weight: bold;
}
.header .logo img {
    height: 60px;
    margin: 0 1rem 0 0;
}
.header .totop {
    display: block;
    width: fit-content;
    margin: 0 0 0 auto;
    border: 5px solid #222;
    border-radius: 50px;
    padding: 1rem;
}

.nav {
    border-bottom: 1.5px solid #eee;
}
.nav .container {
    width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
}
.nav a {
    display: block;
    margin: 0 1rem 0 0;
    padding: calc(1rem + 3px) 0 1rem 0;
    font-size: 1.1rem;
    border-bottom: 3px solid transparent;
}
.nav a.this {
    border-bottom: 3px solid #222;
}
.nav a .box {
    position: relative;
    display: block;
    border: 1.5px solid #eee;
    border-radius: .25rem;
    width: 4.5rem;
    height: 4.5rem;
}
.nav a .box b {
    font-size: 1.5rem;
    position: absolute;
    top: 50%;left: 50%;
    transform: translateX(-50%) translateY(-50%);
}
.nav a .title {
    text-align: center;
    font-size: .85rem;
    margin: .85rem 0 0 0;
}

.main {
    width: 1000px;
    margin: 5rem auto;
    line-height: 1.75rem;
}

.main h1 {
    font-size: 2rem;
    font-weight: bold;
    margin: 3rem 0;
}
.main h2 {
    font-size: 1.5rem;
    font-weight: bold;
    margin: 3rem 0 1rem 0;
}

.footer {
    border-top: 1px solid #eee;
}
.footer .copy {
    padding: 1rem;
    text-align: center;
}

@media screen and (max-width : 599px) {
    .header {
        border-bottom: 1.5px solid #eee;
    }
    .header .container {
        width: 100%;
        margin: 0;
        padding: 0 1rem;
        display: flex;
        align-items: center;
    }
    .header .logo a {
        display: flex;
        align-items: center;
        font-size: 1.15rem;
        font-weight: bold;
    }
    .header .logo img {
        height: 60px;
        margin: 0 1rem 0 0;
    }
    .header .totop {
        display: block;
        width: fit-content;
        margin: 0 0 0 auto;
    }
    
    .nav {
        border-bottom: 1.5px solid #eee;
    }
    .nav .container {
        width: 100%;
        margin: 0;
        padding: 0 1rem;
        display: flex;
        align-items: center;
    }
    .nav a {
        display: block;
        margin: 0 1rem 0 0;
        padding: calc(1rem + 3px) 0 1rem 0;
        font-size: 1.1rem;
        border-bottom: 3px solid transparent;
    }
    .nav a.this {
        border-bottom: 3px solid #222;
    }
    .nav a .box {
        position: relative;
        display: block;
        border: 1.5px solid #eee;
        border-radius: .25rem;
        width: 4.5rem;
        height: 4.5rem;
    }
    .nav a .box b {
        font-size: 1.5rem;
        position: absolute;
        top: 50%;left: 50%;
        transform: translateX(-50%) translateY(-50%);
    }
    .nav a .title {
        text-align: center;
        font-size: .85rem;
        margin: .85rem 0 0 0;
    }
    
    .main {
        width: 100%;
        margin: 5rem 0;
        padding: 0 1rem;
        line-height: 1.75rem;
    }
    
    .main h1 {
        font-size: 2rem;
        font-weight: bold;
        margin: 3rem 0;
    }
    .main h2 {
        font-size: 1.5rem;
        font-weight: bold;
        margin: 3rem 0 1rem 0;
    }
}