:root {
    --color-primary: #115293;
    --color-secondary: #8d8d8d;
}

body {
    margin: 0;
    font-family: sans-serif;
}

header {
    height: 50px;
    background-color: var(--color-primary);
}

header h1 {
    margin: 0;
    padding-top: 5px;
    padding-left: 30px;
    font-size: 25px;
    color: #fff;
}

main {
    margin: 50px 300px;
}

/* スマホ用 */
@media screen and (max-width: 960px) {
    main {
        margin: 50px 15px;
    }
    footer {
        display: none;
    }
}

main h3 {
    margin: 0;
    color: #303030;
    padding-bottom: 10px;
}

#key-input {
    margin-top: 3px;
    margin-left: 10px;
    height: 35px;
}

#container {
    margin-top: 10px;
    display: flex;
}

#container p {
    margin: 8px 0;
}

.textarea {
    margin-top: 20px;
    height: 200px;
    padding: 15px 20px 0;
    overflow-y: scroll;

    font-weight: 700;
    font-size: 15pt;
    line-height: 45px;
    letter-spacing: 0.02em;

    color: var(--color-secondary);
    border: 1px dotted var(--color-secondary);
}

/* span */
.root {
    font-size: 18pt;
    color: var(--color-primary);
}

.on {
    color: var(--color-primary);
}
/**/

footer {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 60px;

    background-color: var(--color-primary);
}