/* Visitor-controlled reading preferences; the administrator's site theme remains unchanged. */
html[data-reading-size="-2"] { font-size: 87.5%; }
html[data-reading-size="-1"] { font-size: 93.75%; }
html[data-reading-size="0"] { font-size: 100%; }
html[data-reading-size="1"] { font-size: 112.5%; }
html[data-reading-size="2"] { font-size: 125%; }

html[data-reading-font="sans"] {
    --font-body: Arial, Verdana, sans-serif;
    --font-display: Arial, Verdana, sans-serif;
}
html[data-reading-font="serif"] {
    --font-body: Georgia, "Times New Roman", serif;
    --font-display: Georgia, "Times New Roman", serif;
}
html[data-reading-spacing="wide"] body { line-height: 1.9; letter-spacing: 0.015em; }
html[data-reading-spacing="wide"] :is(.article-rich-content, .detail-lead, .article-card p) { line-height: 1.9; }
html[data-reading-spacing="wide"] :is(h1, h2, h3, h4, h5, h6) { letter-spacing: 0; line-height: 1.35; }

html[data-reading-contrast="high"] {
    --ink: #111;
    --text: #111;
    --muted: #333;
    --page: #fff;
    --surface: #fff;
    --border: #333;
    --primary: #0047a8;
    --primary-dark: #003b8c;
}
html[data-reading-contrast="high"] :is(.site-header, .article-card, .catalog-item, .activity-card, .detail-demo-card, .detail-aside) {
    border-color: #333;
}
html[data-reading-contrast="high"] :is(.article-rich-content, .detail-lead, .article-card p) { color: #111; }

.reading-controls { position: relative; flex: none; }
.reading-controls-toggle { list-style: none; cursor: pointer; }
.reading-controls-toggle::-webkit-details-marker { display: none; }
.reading-controls-toggle::marker { content: ""; }
.reading-controls[open] .reading-controls-toggle { background: var(--teal-soft); color: var(--ink); }
.reading-controls-panel {
    position: absolute;
    z-index: 1050;
    top: calc(100% + 0.7rem);
    right: 0;
    width: min(340px, calc(100vw - 1.5rem));
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
    padding: 1rem;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}
.reading-controls-panel h2 { margin: 0 0 0.8rem; font-size: 1.1rem; }
.reading-controls-label { margin: 0.8rem 0 0.35rem; font-size: 0.85rem; font-weight: 700; color: var(--ink); }
.reading-controls-row { display: flex; align-items: center; gap: 0.45rem; }
.reading-controls-row button, .reading-controls-option, .reading-controls-reset {
    min-height: 40px;
    padding: 0.4rem 0.7rem;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.6rem;
    font: 600 0.85rem/1.3 var(--font-body);
    cursor: pointer;
}
.reading-controls-row button:hover, .reading-controls-option:hover, .reading-controls-reset:hover { background: var(--teal-soft); }
.reading-controls-row button:disabled { opacity: 0.5; cursor: not-allowed; }
.reading-controls-row output { min-width: 3.5rem; text-align: center; font-weight: 700; }
.reading-controls-fonts { flex-wrap: wrap; }
.reading-controls-fonts button { flex: 1 1 auto; }
.reading-controls-row button[aria-pressed="true"], .reading-controls-option[aria-pressed="true"] {
    color: #fff;
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}
.reading-controls-option { display: block; width: 100%; margin-top: 0.65rem; text-align: left; }
.reading-controls-reset { width: 100%; margin-top: 0.9rem; }
@media print { .reading-controls { display: none !important; } }