.reader-page {
    --reader-size: 18px;
    background: #eee6d6;
}

.reader-shell {
    width: min(100%, 820px);
    min-width: 0;
    margin-inline: auto;
}

.reader-breadcrumbs {
    margin-inline: 2px;
}

.reader-panel {
    min-width: 0;
    border-color: #d5c9b4;
    background: #faf1df;
    padding: 22px 16px 30px;
}

.chapter-header,
.reader-heading {
    border-bottom: 1px solid #d9cfbd;
    padding-bottom: 18px;
    text-align: center;
}

.chapter-header h1,
.reader-heading h1 {
    overflow-wrap: anywhere;
    margin-bottom: 10px;
    font-size: clamp(1.55rem, 7vw, 2.4rem);
    letter-spacing: 0.02em;
}

.chapter-header p,
.reader-heading p {
    margin-bottom: 0;
    color: #626b65;
}

.chapter-header a,
.reader-heading a {
    color: var(--green);
}

.reader-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-block: 18px;
}

.reader-control-group {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 7px;
    min-width: 0;
}

.reader-controls button {
    min-width: 0;
    min-height: 44px;
    border: 1px solid #bfc6bd;
    border-radius: 6px;
    background: #f7eddc;
    color: #31463e;
    padding: 7px 10px;
    cursor: pointer;
}

.reader-controls button:hover,
.reader-controls button[aria-pressed="true"] {
    border-color: var(--green);
    background: var(--green-soft);
    color: var(--green-deep);
}

.reader-controls button:focus-visible,
.chapter-nav a:focus-visible {
    outline: 0;
    box-shadow: inset 0 0 0 2px var(--focus);
}

.reader-controls output {
    display: flex;
    min-width: 0;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    color: #66716b;
    text-align: center;
}

.chapter-nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    margin-block: 18px 26px;
}

.chapter-nav a,
.chapter-nav span {
    display: inline-flex;
    min-width: 0;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 1px solid #d2c9b9;
    border-radius: 6px;
    padding: 8px 6px;
    font-size: 0.88rem;
    text-align: center;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chapter-nav a {
    background: #f7eddc;
    color: var(--green-deep);
    font-weight: 700;
}

.chapter-nav a:hover {
    border-color: var(--green);
    background: var(--green-soft);
}

.chapter-nav span[aria-disabled="true"] {
    background: #ece4d7;
    color: #92958f;
}

.reader-content {
    min-width: 0;
    color: #38362f;
    font-family: "Noto Sans CJK SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
    font-size: var(--reader-size);
    font-weight: 400;
    letter-spacing: 0.015em;
    line-height: 1.96;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.reader-content p {
    margin: 0 0 1.15em;
}

.reader-content img,
.reader-content video,
.reader-content iframe {
    max-width: 100%;
    height: auto;
}

.reader-content table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
}

.chapter-nav-bottom {
    margin-block: 32px 0;
    border-top: 1px solid #d9cfbd;
    padding-top: 22px;
}

html[data-reader-tone="paper"] body.reader-page {
    background: var(--page);
}

html[data-reader-tone="paper"] .reader-panel {
    border-color: var(--line);
    background: var(--paper);
}

html[data-reader-tone="paper"] .reader-content {
    color: #2e3e38;
}

html[data-reader-tone="warm"] body.reader-page {
    background: #eee6d6;
}

html[data-reader-tone="warm"] .reader-panel {
    border-color: #d5c9b4;
    background: #faf1df;
}

html[data-reader-tone="warm"] .reader-content {
    color: #38362f;
}

html[data-reader-tone="night"] {
    color-scheme: dark;
    --page: #202926;
    --paper: #29332f;
    --paper-soft: #242d2a;
    --ink: #eef2ed;
    --body: #d8dfda;
    --muted: #b5c0ba;
    --line: #485650;
    --line-soft: #3e4a45;
    --green: #9bcab8;
    --green-deep: #b9ddcf;
    --green-soft: #344941;
    --danger: #f1aaa0;
    --focus: #e3a26d;
}

html[data-reader-tone="night"] body.reader-page {
    background: #202926;
}

html[data-reader-tone="night"] .top-header,
html[data-reader-tone="night"] .shelf-nav,
html[data-reader-tone="night"] .site-footer {
    border-color: #485650;
    background: #242d2a;
}

html[data-reader-tone="night"] .shelf-track a,
html[data-reader-tone="night"] .global-search input::placeholder {
    color: #b5c0ba;
}

html[data-reader-tone="night"] .shelf-track a:hover,
html[data-reader-tone="night"] .shelf-track a[aria-current="page"],
html[data-reader-tone="night"] .shelf-track a.is-active,
html[data-reader-tone="night"] .global-search button,
html[data-reader-tone="night"] .global-search button:hover {
    border-color: #9bcab8;
    background: #9bcab8;
    color: #202926;
}

html[data-reader-tone="night"] .shelf-track a:focus-visible {
    outline: 0;
    box-shadow: inset 0 0 0 2px #e3a26d;
}

html[data-reader-tone="night"] .shelf-track a:hover:focus-visible,
html[data-reader-tone="night"] .shelf-track a[aria-current="page"]:focus-visible,
html[data-reader-tone="night"] .shelf-track a.is-active:focus-visible,
html[data-reader-tone="night"] .global-search button:focus-visible {
    outline: 0;
    box-shadow: inset 0 0 0 2px #202926;
}

html[data-reader-tone="night"] .reader-panel {
    border-color: #4b5953;
    background: #29332f;
    box-shadow: none;
}

html[data-reader-tone="night"] .chapter-header,
html[data-reader-tone="night"] .reader-heading,
html[data-reader-tone="night"] .chapter-nav-bottom {
    border-color: #4b5953;
}

html[data-reader-tone="night"] .chapter-header h1,
html[data-reader-tone="night"] .reader-heading h1,
html[data-reader-tone="night"] .reader-content {
    color: #eef2ed;
}

html[data-reader-tone="night"] .chapter-header p,
html[data-reader-tone="night"] .reader-heading p,
html[data-reader-tone="night"] .reader-controls output,
html[data-reader-tone="night"] .breadcrumbs {
    color: #b5c0ba;
}

html[data-reader-tone="night"] .chapter-header a,
html[data-reader-tone="night"] .reader-heading a,
html[data-reader-tone="night"] .breadcrumbs a {
    color: #a9d7c6;
}

html[data-reader-tone="night"] .reader-controls button,
html[data-reader-tone="night"] .chapter-nav a {
    border-color: #596861;
    background: #34403b;
    color: #eef2ed;
}

html[data-reader-tone="night"] .reader-controls button:hover,
html[data-reader-tone="night"] .reader-controls button[aria-pressed="true"],
html[data-reader-tone="night"] .chapter-nav a:hover {
    border-color: #9bcab8;
    background: #3a5148;
    color: #f7faf7;
}

html[data-reader-tone="night"] .chapter-nav span[aria-disabled="true"] {
    border-color: #46534e;
    background: #242d2a;
    color: #84928c;
}

html[data-reader-tone="night"] .reader-controls button:focus-visible,
html[data-reader-tone="night"] .chapter-nav a:focus-visible {
    box-shadow: inset 0 0 0 2px #e3a26d;
}

@media (min-width: 700px) {
    .reader-panel {
        padding: 34px 38px 42px;
    }

    .reader-controls {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
    }

    .reader-control-group {
        display: flex;
        flex-wrap: wrap;
    }

    .reader-controls button {
        min-width: 62px;
    }

    .reader-controls output {
        min-width: 54px;
    }

    .chapter-nav {
        gap: 9px;
    }

    .chapter-nav a,
    .chapter-nav span {
        font-size: 0.94rem;
    }
}

@media (min-width: 960px) {
    .reader-panel {
        padding: 46px 58px 54px;
    }
}

@media (max-width: 520px) {
    .reader-page .site-main {
        width: 100%;
        padding-inline: 0;
    }

    .reader-page .breadcrumbs {
        margin-inline: 12px;
    }

    .reader-panel {
        border-right: 0;
        border-left: 0;
        border-radius: 0;
        box-shadow: none;
    }
}

@media (max-width: 370px) {
    .reader-panel {
        padding-inline: 13px;
    }

    .reader-controls button,
    .reader-controls output,
    .chapter-nav a,
    .chapter-nav span {
        font-size: 0.82rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}