html {
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode','Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    background: linear-gradient(to bottom, rgba(139, 0, 0, 1), rgba(75, 0, 130, 1));
    background-attachment: fixed;
    text-align: center;
    color:lightcoral;
}

h1 {
    font-family: 'vivo-sans', '游ゴシック体', 'Yu Gothic UI', 'ヒラギノ角ゴ Pro W3', 'Hiragino Kaku Gothic Pro', 'メイリオ', Meiryo, sans-serif;
}

h2 {
    font-size: 1.7rem;
}

.titlebox {
    padding: 20px;
    border-radius: 15px;
    background-color: rgba(255, 182, 193, 0.5);
    border: 2px solid plum;
    margin-inline: 20vw;
    margin-top: 30px;
    margin-bottom: 50px;
}

.box {
    padding: 20px;
    margin-inline: 20vw;
    margin-top: 30px;
    margin-bottom: 50px;
    border-radius: 15px;
    background-color: rgba(221, 160, 221, 0.5);
    border: 2px solid plum;
}

img.inline-flex {
    display: inline-flex;
    margin: 10px;
    max-width: 40%;
    height: auto;
    border-radius: 10px; 
}

img.block {
    display: block;
    margin: 20px auto;
    max-width: 80%;
    height: auto;
    border-radius: 10px; 
}

section.music {
    margin: 20px auto;
    padding: 10px;
    margin-inline:22vw;
    border-radius: 10px;
    background-color: rgba(255, 182, 193, 0.6);
    border: 2px solid plum;
    font-size: 1.5rem;
    font-family: 'Fira Sans', 'Segoe UI', 'Hiragino Sans GB', 'Microsoft YaHei', 'Arial Rounded MT Bold', Arial, sans-serif;
    color: #c2185b;
    text-align: center;
    position: relative;
}

    section.music p::before,
    section.music p::after {
        content: "🎵";
        font-size: 2rem;
        vertical-align: middle;
        margin: 0 0.5em;
        color: #ba68c8;
    }

    section.music p::before {
        margin-right: 0.5em;
    }

    section.music p::after {
        margin-left: 0.5em;
    }

.box p,
.box ul,
.box ol {
    list-style-type: none;
    text-align: justify;
    font-size: 1.2rem;
    line-height: 1.6;
}

    .box ul li,
    .box ol li {
        margin-bottom: 1em;
    }

    .box p + ul {
        list-style-type: inherit;
    }

    .box p + ol {
        list-style-type: decimal;
    }
        .box p::before {
            content: "　　";
        }

        .box p.middle {
            text-align: center;
        }

            .box p.middle::before {
                content: "";
            }

footer.box p{
    text-align: center;
}

a:link, a:visited {
    color: plum;
}

a:hover, a:focus {
    color: lightblue;
    text-decoration: none;
}

.titlebox:hover, .titlebox:focus, .box:hover, .box:focus,.music:hover,.music:focus {
    background-color: darkred;
    border-color: mediumvioletred;
}

.edittime {
    font-size: 0.7rem;
    color: aqua;
    text-align: end;
    margin-top: 50px;
    font-family: YouYuan;
}

.red {
    color: red;
    font-style:inherit;
}

.blue {
    color: blue;
    font-style: inherit;
}

.purple {
    color: purple;
    font-style: inherit;
}

.aqua {
    color: aqua;
    font-style: inherit;
}

.bigger {
    font-size: 1.8rem;
}

.bigger2 {
    font-size: 2.2rem;
}

footer {
    font-family: YouYuan;
}

@media (max-width: 600px) {
    .music,
    .titlebox,
    .box {
        margin-inline: 2vw;
        margin-top: 16px;
    }

    .music {
        font-size: 1.2rem;
    }

    img.inline-flex {
        max-width: 90%;
        margin: 8px auto;
        display: block;
    }

    img.block {
        max-width: 98%;
        margin: 12px auto;
    }
}