h1,
h2,
h3,
h4,
h5,
h6,
p {
    overflow-wrap: break-word;
    color: inherit;
    transition: color .3s .15s;
}

h1 {
    font-size: 2em;
}

h2 {
    font-size: 1.8em;
}

h3 {
    font-size: 1.6em;
}

h4 {
    font-size: 1.4em;
}

h5 {
    font-size: 1.2em;
}

h6 {
    font-size: 1.1em;
}

code:not(pre code) {
    /* inline code style */
    padding: 1px 8px;
    margin: 0 4px;
    color: var(--default-inline-code-color);
    background-color: var(--default-inline-code-bg-color);
    font-family: var(--code-font);
    border-radius: 8px;
    box-shadow: none !important;
    transition: color .3s .15s,
                background .3s .15s;
}

a::before {
    display: inline-block;
    content: "🔗";
    font-size: .875em;
}
a:link {
    color: var(--default-link-unvisited-color);
}
a:visited {
    color: var(--default-link-visited-color);
}

u {
    position: relative;
    bottom: 0;
    text-decoration: none;
    background-image: linear-gradient(to right, var(--default-tx-color), var(--default-tx-color));
    background-repeat: no-repeat;
    background-position: bottom center;
    background-size: 100% 1px;
    transition: bottom .3s .05s,
                padding .3s .05s,
                background-size .3s;
}
u:hover {
    bottom: 1px;
    padding-bottom: 2px;
    background-size: 100% 3px;
}

del {
    padding: 0 2px;
    text-decoration: none;
    background-image: linear-gradient(to right, var(--default-tx-color), var(--default-tx-color));
    background-repeat: no-repeat;
    background-position: left center;
    background-size: 100% 2px;
    transition: background-size .3s;
}
del:hover {
    background-size: 100% 4px;
}

span.dim {
    /* dimmed text */
    opacity: .7;
}
.dark span.dim {
    opacity: .8;
}

hr {
    margin: 0 6vw calc(1rem + 4px);
    padding: .3rem 0;
    border: none;
    border-bottom: 2px solid var(--deep-bd-color);
    color: transparent;
    transition: margin .3s;
}
hr:hover {
    margin-left : 2vw;
    margin-right: 2vw;
}

/* phonetic notation start */
ruby {
    position: relative;
}
ruby::before {
    position: absolute;
    left: 50%;
    bottom: calc(1em + 4px);
    transform: translateX(-50%);
    content: attr(data-notation);
    padding: 2px 6px;
    white-space: nowrap;
    background-color: var(--default-bg-color);
    border-radius: 4px;
    opacity: 0;
    z-index: 1;
    pointer-events: none;
    transition: opacity .3s .05s;
}
ruby:hover::before {
    opacity: 1;
}

ruby rt {
    position: relative;
    top: 0;
    opacity: 1;
    font-size: 9px;
    transition: opacity .3s;
}
ruby:hover rt {
    opacity: 0;
}
/* phonetic notation end */

/* detail start */
span.detail {
    position: relative;
    cursor: pointer;
    text-decoration: underline wavy var(--default-tx-color);
}
span.detail > div.detail-content {
    position: absolute;
    top: calc(100% + 4px);
    left: 50%;
    width: max-content;
    max-width: 14rem;
    padding: 2px 6px;
    background-color: var(--default-bg-color);
    border-radius: 4px;
    cursor: auto;
    opacity: 1;
    transform: translateX(-50%);
    transition: opacity .3s;
}
span.detail[data-collapse] > div.detail-content {
    opacity: 0;
    pointer-events: none;
}
/* detail end */