/* Reading UI refinement. Prose, illustrations and audio files stay unchanged. */
:root{--sans:"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",Arial,sans-serif;--muted:#646b60;--body:19px;--ui:14px;--line:#d7d8cc}
body{font-family:var(--sans)}
.masthead,.reading .masthead{height:72px;padding:0 max(24px,5.3%);gap:24px}
.brand{font-size:23px;letter-spacing:.08em;gap:12px;min-height:44px}
.mast-caption,.mast-index,.menu-toggle{font-size:13px;line-height:1.5}
.mast-index{display:inline-flex;align-items:center;gap:16px;min-height:44px;padding:8px 4px}
.mast-index span{margin:0;font-size:19px}
.reading .layout{grid-template-columns:210px minmax(0,720px);gap:64px;padding:40px 32px 64px;max-width:1120px}
.sidebar summary,.sidebar li,.sidebar .current{font-size:14px;line-height:1.7}
.sidebar summary{min-height:40px;padding:8px 0}
.sidebar li{margin-bottom:12px}
.sidebar a{display:flex;align-items:baseline;gap:10px;padding:5px 0}
.sidebar .section-nav a{border-left:0;padding-left:0}
.back-link{font-size:14px;line-height:1.6;margin-bottom:30px;padding:4px 0}
.chapterhead{border:0;margin:0 0 32px;padding:0}
.chapterhead .eyebrow{font-size:12px;line-height:1.6;letter-spacing:.12em;gap:22px;margin-bottom:12px}
.chapterhead .eyebrow>span{font-size:12px}
.chapterhead h1{font-size:36px;line-height:1.4;letter-spacing:.02em;margin:0 0 16px}
.reading-stats{font:14px/1.7 var(--sans);gap:6px 10px;margin:0 0 20px}
.chapter-meta{align-items:center;gap:20px}
.meta{font-size:13px;line-height:1.7}
.tools{gap:0;align-items:center}
.tools>span{font-size:13px;margin-right:12px}
.tools button{font-size:14px;min-width:44px;height:42px;padding:0 12px}
.tools button:first-of-type{border-radius:5px 0 0 5px}
.tools button:last-of-type{border-radius:0 5px 5px 0}
.chapter-audio{margin:0 0 32px;padding:24px 0;border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font:14px/1.75 var(--sans);min-width:0;max-width:100%;overflow-wrap:anywhere}
.chapter-audio h2{font:600 18px/1.5 var(--sans);margin:0 0 8px}
.chapter-audio p{font:14px/1.75 var(--sans);margin:0;color:var(--muted);white-space:normal;max-width:100%;overflow-wrap:anywhere}
.chapter-audio audio{width:100%;height:48px;margin:16px 0;display:block}
.chapter-audio .audio-options{display:flex;flex-wrap:wrap;gap:12px 24px;margin:0;font:14px/1.7 var(--sans);align-items:center}
.chapter-audio label{display:flex;align-items:center;gap:10px;max-width:100%;margin:0}
.chapter-audio select{appearance:none;-webkit-appearance:none;min-height:44px;padding:9px 40px 9px 12px;font:14px/1.5 var(--sans);color:var(--ink);border:1px solid #b9bdb0;border-radius:5px;background-color:transparent;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='m1 1 5 5 5-5' fill='none' stroke='%23646b60' stroke-width='1.5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;max-width:100%}
.chapter-audio select:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.chapter-audio .audio-status{font-size:13px;line-height:1.7;margin:12px 0 0;min-height:22px}
.prose{--body:19px;line-height:1.95}
.prose h2{font-size:24px;line-height:1.6;margin-bottom:24px;font-weight:600}
.prose p{margin-bottom:1.4em}
.prose figcaption{font-size:14px;line-height:1.85}
.prose section+section{margin-top:52px}
.entry-meta,.contents-label p,.edition-note{font-size:13px;line-height:1.8}
.chapterlist h3{font-size:23px;line-height:1.5;margin:0 0 10px}
.chapterlist a{padding:26px 8px 26px 0}
.entry-arrow{font-size:22px;line-height:1.5;min-width:28px;text-align:center}
.site-footer>span,.site-footer>a:last-child,.solar-photo figcaption{font-size:12px;line-height:1.8}
@media(max-width:880px){
 .reading .layout{display:block;max-width:780px;padding:32px 24px 48px}
 .sidebar{padding:28px 24px}
 .menu-toggle{padding:10px 12px;min-height:44px;display:flex;align-items:center;gap:10px}
 .menu-toggle span{padding:0}
 .menu-close{padding:8px;min-width:44px;min-height:44px}
 .chapterhead h1{font-size:34px}
}
@media(max-width:600px){
 .masthead,.reading .masthead{height:64px;padding:0 20px;gap:12px}
 .brand{font-size:21px;gap:10px}
 .brand-sun-photo{width:26px;height:26px}
 .mast-caption{display:none}
 .mast-index{font-size:13px;gap:10px;padding:8px 0 8px 8px}
 .mast-index span{font-size:18px}
 .reading .layout{padding:28px 22px 40px}
 .back-link{font-size:13px;margin-bottom:24px}
 .chapterhead{margin-bottom:24px;padding:0}
 .chapterhead h1{font-size:30px;line-height:1.45;margin-bottom:14px}
 .chapterhead .eyebrow{font-size:11px;gap:18px;margin-bottom:12px}
 .chapterhead .eyebrow>span{font-size:12px}
 .reading-stats{font-size:13px;margin:0 0 18px;gap:5px 8px}
 .chapter-meta{align-items:center;gap:14px}
 .meta{font-size:13px;line-height:1.7}
 .tools button{min-width:44px;height:42px;font-size:14px;padding:0 10px}
 .chapter-audio{padding:20px 0;margin-bottom:28px}
 .chapter-audio h2{font-size:18px}
 .chapter-audio p{font-size:13px;line-height:1.8}
 .chapter-audio .audio-options{display:flex;align-items:stretch;gap:12px}
 .chapter-audio label{display:flex;margin:0;gap:8px;font-size:13px}
 .chapter-audio label:first-child{flex:1 1 100%}
 .chapter-audio select[data-audio-section]{flex:1;min-width:0}
 .chapter-audio select{font-size:14px;min-height:44px}
 .chapter-audio .audio-status{font-size:13px;margin-top:12px}
 .prose{--body:18px;line-height:1.95}
 .prose h2{font-size:22px;line-height:1.6;margin-bottom:22px}
 .prose figcaption{font-size:13px;line-height:1.85}
 .home .layout{padding:0 22px}
 .intro-copy h1{font-size:64px}
 .intro-note,.contents-label p,.entry-meta,.edition-note{font-size:13px;line-height:1.8}
 .contents-label{grid-template-columns:1fr;gap:4px}
 .contents-label p{text-align:left}
 .chapterlist h3{font-size:21px;line-height:1.55}
 .chapterlist a{padding:24px 4px 24px 0}
 .chapter-number{font-size:21px}
 .entry-arrow{font-size:21px;min-width:24px}
 .meta-separator{padding:0 5px}
 .site-footer{margin-left:22px;margin-right:22px;gap:16px;flex-wrap:wrap}
 .site-footer>a:last-child{font-size:13px;padding:10px 0}
 .site-footer>span{font-size:12px}
}
@media print{.chapter-audio{display:none}}