.reader-page {
    --reader-size: 18px;
    background: #eee3d0;
}

.reader-shell {
    width: min(100%, 850px);
    min-width: 0;
    margin-inline: auto;
}

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

.reader-panel {
    min-width: 0;
    border-color: #d4c3ab;
    background: #fbf0dc;
    padding: 22px 16px 30px;
}

.reader-heading {
    border-bottom: 1px solid #dacbb5;
    padding-bottom: 18px;
    text-align: center;
}

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

.reader-heading p,
.reader-heading span {
    margin-bottom: 0;
    color: #625a52;
}

.reader-heading a {
    color: var(--brick-deep);
}

.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 #c5b8a8;
    border-radius: 4px;
    background: #f6e8d2;
    color: #453b34;
    padding: 7px 10px;
}

.reader-controls button:hover,
.reader-controls button[aria-pressed="true"] {
    border-color: var(--brick);
    background: var(--brick-soft);
    color: var(--brick-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: #655d55;
    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 #d2c3af;
    border-radius: 4px;
    padding: 8px 6px;
    font-size: 0.88rem;
    text-align: center;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chapter-nav a {
    background: #f7ead5;
    color: var(--brick-deep);
    font-weight: 700;
}

.chapter-nav a:hover {
    border-color: var(--brick);
    background: var(--brick-soft);
    text-decoration: none;
}

.chapter-nav span[aria-disabled="true"] {
    background: #e9dfd1;
    color: #6b625b;
}

.reader-content {
    min-width: 0;
    color: #3b332d;
    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: 1.98;
    overflow-wrap: anywhere;
    word-break: break-word;
}

html[data-reader-line="compact"] .reader-content {
    line-height: 1.7;
}

html[data-reader-line="loose"] .reader-content {
    line-height: 2.25;
}

.reader-content p {
    margin: 0 0 1.2em;
}

.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 #dacbb5;
    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: var(--ink);
}

html[data-reader-tone="paper"] .reader-heading,
html[data-reader-tone="paper"] .chapter-nav-bottom {
    border-color: var(--line);
}

html[data-reader-tone="paper"] .reader-heading p,
html[data-reader-tone="paper"] .reader-heading span,
html[data-reader-tone="paper"] .reader-controls output,
html[data-reader-tone="paper"] .breadcrumbs {
    color: var(--muted);
}

html[data-reader-tone="paper"] .reader-heading a,
html[data-reader-tone="paper"] .breadcrumbs a {
    color: var(--brick-deep);
}

html[data-reader-tone="paper"] .reader-controls button,
html[data-reader-tone="paper"] .chapter-nav a {
    border-color: var(--line);
    background: var(--paper-soft);
    color: var(--ink);
}

html[data-reader-tone="paper"] .reader-controls button:hover,
html[data-reader-tone="paper"] .reader-controls button[aria-pressed="true"],
html[data-reader-tone="paper"] .chapter-nav a:hover {
    border-color: var(--brick);
    background: var(--brick-soft);
    color: var(--brick-deep);
}

html[data-reader-tone="paper"] .chapter-nav span[aria-disabled="true"] {
    border-color: var(--line-soft);
    background: var(--paper-soft);
    color: var(--muted);
}

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

html[data-reader-tone="warm"] body.reader-page {
    background: #eee3d0;
}

html[data-reader-tone="warm"] .reader-panel {
    border-color: #d4c3ab;
    background: #fbf0dc;
}

html[data-reader-tone="warm"] .reader-content {
    color: #3b332d;
}

html[data-reader-tone="night"] {
    --page: #211c1b;
    --paper: #2c2523;
    --paper-soft: #26201e;
    --ivory: #f2e9df;
    --ivory-soft: #dfd3c7;
    --ink: #f2e9df;
    --body: #dfd3c7;
    --muted: #bfb1a5;
    --line: #574941;
    --line-soft: #483c37;
    --brick: #e3a294;
    --brick-deep: #f0b2a4;
    --brick-soft: #46312e;
    --gold: #dbb17a;
    --danger: #f3aaa0;
    --focus: #f2b37d;
    color-scheme: dark;
}

html[data-reader-tone="night"] body.reader-page {
    background: #211c1b;
}

html[data-reader-tone="night"] .top-header,
html[data-reader-tone="night"] .shelf-nav,
html[data-reader-tone="night"] .site-footer {
    border-color: #574941;
    background: #26201e;
}

html[data-reader-tone="night"] .brand-lockup,
html[data-reader-tone="night"] .history-action,
html[data-reader-tone="night"] .shelf-track a,
html[data-reader-tone="night"] .global-search input {
    color: #f2e9df;
}

html[data-reader-tone="night"] .brand-tagline,
html[data-reader-tone="night"] .global-search input::placeholder,
html[data-reader-tone="night"] .shelf-track a:not(.is-active) {
    color: #bfb1a5;
}

html[data-reader-tone="night"] .history-action,
html[data-reader-tone="night"] .global-search input {
    border-color: #574941;
    background: #2c2523;
}

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: #e3a294;
    background: #e3a294;
    color: #251f1d;
}

html[data-reader-tone="night"] .shelf-track a:focus-visible {
    outline: 0;
    box-shadow: inset 0 0 0 2px #f2b37d;
}

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 #251f1d;
}

html[data-reader-tone="night"] .reader-panel {
    border-color: #5a4b43;
    background: #2c2523;
}

html[data-reader-tone="night"] .reader-heading,
html[data-reader-tone="night"] .chapter-nav-bottom {
    border-color: #5a4b43;
}

html[data-reader-tone="night"] .reader-heading h1,
html[data-reader-tone="night"] .reader-content {
    color: #f2e9df;
}

html[data-reader-tone="night"] .reader-heading p,
html[data-reader-tone="night"] .reader-heading span,
html[data-reader-tone="night"] .reader-controls output,
html[data-reader-tone="night"] .breadcrumbs {
    color: #bfb1a5;
}

html[data-reader-tone="night"] .reader-heading a,
html[data-reader-tone="night"] .breadcrumbs a {
    color: #efb1a3;
}

html[data-reader-tone="night"] .reader-controls button,
html[data-reader-tone="night"] .chapter-nav a {
    border-color: #68564d;
    background: #3a302c;
    color: #f2e9df;
}

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: #e3a294;
    background: #543b36;
    color: #fff7ed;
}

html[data-reader-tone="night"] .chapter-nav span[aria-disabled="true"] {
    border-color: #50433d;
    background: #26201e;
    color: #94877d;
}

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 #f2b37d;
}

@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;
    }
}

@media (max-width: 390px) {
    .reader-panel {
        padding-inline: 13px;
    }
}

@media (max-width: 360px) {
    .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;
    }
}