body {
    margin: 0;
    color: #333;
}
h1 {
    font-size: inherit;
    text-align: center;
    color: #777;
    margin: 0 8px 32px;
    padding: 8px 0;
    border-bottom: 1px solid #ccc;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 8px;
}

label {
    color: #999;
}
label:has(input) {
    display: flex;
    padding: 8px 0;
}
label:has(input), #subjectArea, #bodyArea {
    border-bottom: 1px solid #ccc;
}
label > input {
    flex: 1 1 0;
    margin-left: 8px;
    border: none;
}
input:focus, textarea:focus {
    outline: none;
}
label:has(input):focus-within, #subjectArea:focus-within, #bodyArea:focus-within {
    border-bottom-color: #333;
}
#subjectArea, #bodyArea {
    position: relative;
}
#subjectArea {
    padding: 8px 0;
}
#subjectArea > label {
    position: absolute;
    top: 8px;
    left: 0;
    transition: color .2s;
}
#subjectArea:has(input:not(:invalid)) > label {
    color: transparent;
}
#subjectInput {
    width: 100%;
    border: none;
    margin: 0;
    padding: 0;
    font-weight: bold;
}
#bodyArea {
    padding-top: 8px;
}
#bodyArea > label {
    position: absolute;
    top: 12px;
    left: 0;
    font-size: inherit;
    z-index: -1;
    transition: color .2s;
}
#bodyArea:has(textarea:not(:invalid)) > label {
    color: transparent;
}
textarea {
    width: 100%;
    min-height: 12em;
    padding: 4px 0;
    border: none;
    resize: vertical;
    field-sizing: content;
}
input, textarea {
    font-family: inherit;
    font-size: initial;;
    color: #333;
    background-color: transparent;
}
#control {
    text-align: right;
    margin: 8px -4px 0;
}
button {
    background-color: #eee;
    font-family: inherit;
    font-size: initial;
    border: 1px solid #ccc;
    border-radius: 0;
    padding: 2px 8px;
    margin: 4px;
    cursor: pointer;
    transition: background-color .2s;
}
@media (hover: hover) {
    button:hover {
        background-color: #fff;
    }
}
button:focus {
    outline: none;
    border-color: #333;
}
button:active {
    background-color: #ddd;
}

#shareArea, #saveArea {
    margin: 48px auto 0;
    width: 800px;
}

#shareArea {
    display: flex;
    justify-content: center;
    align-items: center;
}
#mailtoQR {
    width: 8em;
    height: 8em;
}

#saveArea {
    text-align: center;
}

#mailtoLink, #saveLink {
    display: inline-block;
    background-color: #eee;
    margin-top: .5em;
    padding: .4em 1em;
    font-size: 90%;
    word-break: break-all;
    font-family: monospace;
    user-select: all;
}

.invalid-qr > #mailtoQR, .invalid-qr > div > span {
    display: none;
}