.reader-page {
    --reader-size: 18px;
    background: #eee7d8;
}

.reader-shell {
    width: min(100%, 780px);
    min-width: 0;
    margin-inline: auto;
}

.reader-breadcrumbs {
    margin-inline: 4px;
}

.reader-card {
    min-width: 0;
    border: 1px solid #d9cbb4;
    border-radius: 16px;
    background: #fbf3e3;
    padding: clamp(24px, 5vw, 54px);
}

.chapter-header {
    border-bottom: 1px solid var(--line);
    padding-bottom: 22px;
    text-align: center;
}

.chapter-header h1 {
    overflow-wrap: anywhere;
    margin-bottom: 12px;
    font-family: "Songti SC", SimSun, serif;
    font-size: clamp(1.7rem, 4vw, 2.5rem);
}

.chapter-header > p:last-child {
    margin-bottom: 0;
    color: var(--muted);
}

.chapter-header a {
    color: var(--accent);
}

.reader-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-block: 20px;
}

.reader-control-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.reader-controls button {
    min-width: 58px;
    min-height: 44px;
    border: 1px solid #bdcbc7;
    border-radius: 8px;
    background: var(--paper);
    color: var(--ink);
    padding: 7px 12px;
    cursor: pointer;
}

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

.reader-controls output {
    min-width: 52px;
    color: var(--muted);
    text-align: center;
}

.chapter-nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-block: 18px 28px;
}

.chapter-nav a,
.chapter-nav span {
    display: inline-flex;
    min-width: 0;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 8px 10px;
    text-align: center;
}

.chapter-nav a {
    background: var(--paper);
    color: var(--accent-deep);
    font-weight: 700;
}

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

.chapter-nav span[aria-disabled="true"] {
    background: #eeeae1;
    color: #99a4a2;
}

.reader-content {
    min-width: 0;
    color: #3b352d;
    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: 0.012em;
    line-height: 1.95;
    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: 34px 0;
    border-top: 1px solid var(--line);
    padding-top: 24px;
}

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

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

html[data-reader-tone="paper"] .reader-content {
    color: #263638;
}

html[data-reader-tone="warm"] body.reader-page {
    background: #eee7d8;
}

html[data-reader-tone="warm"] .reader-card {
    border-color: #d9cbb4;
    background: #fbf3e3;
}

html[data-reader-tone="warm"] .reader-content {
    color: #3b352d;
}

html[data-reader-tone="night"] body.reader-page {
    background: #20292a;
}

html[data-reader-tone="night"] {
    color-scheme: dark;
}

html[data-reader-tone="night"] .reader-card {
    border-color: #455456;
    background: #283334;
}

html[data-reader-tone="night"] .chapter-header,
html[data-reader-tone="night"] .chapter-nav-bottom {
    border-color: #455456;
}

html[data-reader-tone="night"] .chapter-header h1,
html[data-reader-tone="night"] .reader-content {
    color: #edf2ef;
}

html[data-reader-tone="night"] .chapter-header > p:last-child,
html[data-reader-tone="night"] .reader-controls output {
    color: #b8c5c2;
}

html[data-reader-tone="night"] .reader-breadcrumbs {
    color: #b8c5c2;
}

html[data-reader-tone="night"] .reader-breadcrumbs a,
html[data-reader-tone="night"] .chapter-header a {
    color: #9fd6d2;
}

html[data-reader-tone="night"] .reader-controls button,
html[data-reader-tone="night"] .chapter-nav a {
    border-color: #536466;
    background: #334143;
    color: #edf2ef;
}

html[data-reader-tone="night"] .chapter-nav span[aria-disabled="true"] {
    border-color: #455456;
    background: #242e2f;
    color: #7e8d8b;
}

html[data-reader-tone="night"] .reader-card button:focus-visible,
html[data-reader-tone="night"] .reader-card a:focus-visible {
    outline-color: #d28a52;
}

@media (max-width: 720px) {
    .reader-card {
        padding: 24px;
    }

    .reader-controls {
        align-items: stretch;
        flex-direction: column;
    }

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

    .reader-controls output {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

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

    .reader-breadcrumbs {
        margin-inline: 14px;
    }

    .reader-card {
        border-right: 0;
        border-left: 0;
        border-radius: 0;
        padding: 22px 16px 30px;
    }

    .chapter-header h1 {
        font-size: 1.65rem;
    }

    .reader-content {
        line-height: 1.92;
    }

    .chapter-nav {
        gap: 6px;
    }

    .chapter-nav a,
    .chapter-nav span {
        padding-inline: 6px;
        font-size: 0.9rem;
    }
}