*{
    box-sizing: border-box;
    max-width: 1280px;
    margin: 0 auto;
}

body{
    margin: 0;
}

.midashi {
    font-size: 34px;
}

header {
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 100px;
    font-weight: bold;
}

header > h1 {
    border: #000 solid 1px;
}

section > h1 {
    text-align: center;
    height: 50px;
    margin: 30px;
}

#home {
    border: 1px solid #000;
}

header ul {
    display: flex;
    list-style: none;
}

header li {
    margin: 20px;
}

header a {
    text-decoration: none;
    color: #000;
}

#main-img {
    width: 100%;
}

#about-flex {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 30px;
}

#about-flex > div {
    margin: 30px;
}

#about-img > img {
    border-radius: 50%;
}

#description > dl > dt {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 10px;
}

#description > dl > dd > li {
    font-size: 18px;
}

footer {
    color: grey;
    text-align: center;
    margin-top: 50px;
    padding-bottom: 30px;
    height: 20px;
    align-items: center;
    background-color: #dcdcdc;
}

/*workのところ一生できない*/
#works-flex {
    display: flex;
    max-width: 752px;
    justify-content: center;
    margin: 0 auto;
}

.works-content {
    width: 25%;
    margin: 0 10px;
}

.works-content > img {
    width: 100%;
} 

@media (max-width: 767px) {

    .midashi {
        font-size: 22px;
    }
    
    #about-flex {
        flex-direction: column;
    }

    #description > dl > dt {
        margin-left: 30px;
    }

    #works-flex {
        flex-direction: column;
    }

    .works-content {
        width: 80%;
        margin: 30px auto;
    }

}