@charset "UTF-8";
.period-note{max-width:500px;margin:12px auto 0;color:var(--muted);font-size:12px;line-height:1.7}
.decade-directory{display:flex;gap:8px;max-width:1100px;margin:24px auto 0;padding:12px 8px 18px;overflow-x:auto;scrollbar-width:thin;scrollbar-color:var(--line) transparent;width:90%;position:relative}
.decade-stop{flex:0 0 108px;position:relative;min-height:48px;padding:8px 0 17px;background:transparent;color:var(--muted);font:14px Georgia,serif;white-space:nowrap}
.decade-stop::after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;border-radius:2px;background:linear-gradient(to right,var(--red) var(--progress,0%),var(--line) var(--progress,0%))}
.decade-stop[aria-current]{color:var(--ink);font-weight:700}
.decade-stop[aria-current]::before{content:"";position:absolute;bottom:-3px;left:calc(var(--progress) - 4px);width:9px;height:9px;border-radius:50%;background:var(--red)}
.decade-stop:hover{color:var(--ink)}
:root{--paper:#f4f0e6;--ink:#292c26;--muted:#68695e;--line:#d6d2c7;--red:#a94732;--serif:Georgia,"Songti SC","SimSun",serif;--sans:"Segoe UI","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.7 var(--sans)}body.dialog-open{overflow:hidden}h1,h2,h3,p{margin:0}button{font:inherit;color:inherit;cursor:pointer;border:0}a{color:inherit;text-underline-offset:4px}button:focus-visible,a:focus-visible{outline:2px solid var(--red);outline-offset:5px}[hidden]{display:none!important}button:disabled{opacity:.35;cursor:default}::selection{background:#d8b8a5}.skip-link{position:fixed;top:-100px;left:20px;z-index:5;background:var(--ink);color:var(--paper);padding:12px}.skip-link:focus{top:10px}
.masthead{margin:0 5%;height:76px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.wordmark{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:600;font-size:15px}.brand-mark{font-size:30px;color:var(--red)}.header-period{display:flex;gap:22px;font:16px Georgia,serif}.header-caption{font:12px var(--sans);color:var(--muted)}
main{max-width:760px;margin:auto;padding:22px 24px 30px;text-align:center;outline:none}.intro p{font-size:15px;color:var(--muted)}h1{font-size:clamp(22px,4vw,30px);line-height:1.5;margin:4px 0 20px}.chapter h2{font:clamp(35px,6vw,48px)/1.2 Georgia,serif;letter-spacing:-.04em;outline:none}.timeline{list-style:none;margin:0;padding:0}.event-button{display:flex;flex-direction:column;align-items:center;width:100%;padding:0;background:transparent}.artwork{position:relative;isolation:isolate;width:260px;height:245px;overflow:hidden;background:transparent!important}.artwork-image{position:absolute;height:122%;aspect-ratio:3/4;top:-11%;left:50%;transform:translateX(-50%);background-image:url('assets/history-objects.png');background-size:400% 200%;background-position:var(--art-x) var(--art-y);mix-blend-mode:multiply}.artwork-icon{position:absolute;width:130px;height:130px;top:50%;left:50%;transform:translate(-50%,-50%)}.art-caption{display:none}.node-year{font:18px Georgia,serif;color:var(--red);margin:0 0 5px}.event-name{font:600 27px/1.5 var(--sans)}.event-description{font-size:15px;line-height:1.8;max-width:510px;margin-top:9px;color:var(--muted)}.open-hint{font-size:12px;margin-top:10px;color:var(--muted);text-decoration:underline;text-underline-offset:4px}.event-button:hover .event-name{color:var(--red)}.play-guide{margin:26px 0 14px}.play-guide strong{font-size:22px;font-weight:600}.play-guide p{font-size:13px;margin-top:6px;color:var(--muted)}kbd{display:inline-block;background:#fffaf0;border:2px solid var(--ink);border-bottom-width:4px;border-radius:7px;padding:0 12px;font:inherit;margin:0 3px}.journey-controls{display:flex;align-items:center;justify-content:center;gap:18px}.journey-controls button{min-height:54px;border-radius:6px}#previous{width:54px;background:transparent;border:1px solid var(--line);font-size:23px}#next{background:var(--ink);color:var(--paper);font-size:20px;font-weight:600;padding:12px 36px;min-width:240px}#next:hover{background:var(--red)}#journey-position{font:16px Georgia,serif;width:40px;color:var(--muted)}footer{padding:20px 5%;display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:11px}.detail-art{width:100%}
.event-dialog{position:fixed;inset:0 0 0 auto;margin:0;width:min(640px,100%);max-width:100%;height:100%;max-height:100dvh;padding:0;border:0;border-left:1px solid var(--line);background:var(--paper);color:var(--ink);overflow-y:auto;overscroll-behavior:contain;box-shadow:-20px 0 80px #20271918}.event-dialog::backdrop{background:#20261e80;backdrop-filter:blur(3px)}.detail-toolbar{position:sticky;top:0;background:var(--paper);display:flex;align-items:center;justify-content:space-between;padding:18px 30px;border-bottom:1px solid var(--line);z-index:2}.detail-label{font-size:13px;letter-spacing:.14em;color:var(--muted)}.close-button{padding:7px 3px 7px 14px;background:transparent;display:flex;align-items:center;gap:20px;font-size:14px;min-height:44px}.close-button span{font-size:28px;line-height:1;font-weight:300}.detail-content{padding:34px 42px 52px}.detail-date{color:var(--red);font:38px Georgia,serif}.detail-content h2{font:500 34px/1.5 var(--serif);letter-spacing:.02em;margin:12px 0}.detail-meta{font-size:13px;color:var(--muted);margin-bottom:23px}.detail-art{margin:20px 0 8px}.detail-image-note{font-size:12px;color:var(--muted);margin-bottom:27px}.detail-lead{font-size:19px;line-height:1.8;margin-bottom:28px}.detail-section{margin-top:27px}.detail-section h3{font-size:14px;font-weight:500;letter-spacing:.09em;color:var(--red);margin-bottom:10px}.detail-section p{font-size:16px;line-height:1.95;white-space:pre-line}.detail-context{padding:20px 22px;background:#e8e7dc;margin:28px 0}.detail-context h3{margin-bottom:8px}.source-list{list-style:none;margin:15px 0 0;padding:0}.source-list li{padding:15px 0;border-top:1px solid var(--line)}.source-list a{font-size:14px;font-weight:500;overflow-wrap:anywhere}.source-list p{font-size:12px;color:var(--muted);line-height:1.7;margin:4px 0}.source-detail{margin-top:14px}.source-detail summary{font-size:13px;color:var(--muted);cursor:pointer;padding:8px 0}.source-detail p{font-size:13px}.noscript-message{margin:30px;background:var(--paper);padding:25px;border:1px solid var(--red)}

.detail-art{height:230px}.detail-meta{display:flex;gap:8px;flex-wrap:wrap}.detail-content h2{overflow-wrap:anywhere}
@media(max-width:600px){.masthead{height:58px}.wordmark{font-size:12px}.header-period{font-size:12px}.header-caption{display:none}main{padding:20px 18px}.intro p{font-size:13px}h1{margin-bottom:20px}.artwork{width:230px;height:210px}.artwork-icon{width:110px;height:110px}.event-name{font-size:23px}.event-description{font-size:14px}.play-guide{margin-top:24px}.play-guide strong{font-size:20px}.play-guide p{font-size:12px}.journey-controls{gap:12px}#next{min-width:0;flex:1;max-width:250px;padding:12px;font-size:18px}#previous{width:44px}#journey-position{width:32px}footer{justify-content:center;text-align:center;flex-wrap:wrap}footer span:first-child{display:none}.detail-content{padding:25px}.detail-content h2{font-size:28px}.detail-toolbar{padding:12px 20px}.detail-art{height:200px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important}}

/* Keep the play hint and controls centered independently of progress text. */
.play-guide{text-align:center;display:flex;justify-content:center}.play-guide strong{animation:play-hint 2.8s ease-in-out infinite}.journey-controls{flex-wrap:wrap;max-width:430px;margin:auto}#journey-position{width:100%;font:13px var(--sans);text-align:center}@keyframes play-hint{0%,100%{opacity:1}50%{opacity:.35}}@media(prefers-reduced-motion:reduce){.play-guide strong{animation:none}}

/* Reading preferences retain the spacious layout in both palettes. */
:root{color-scheme:light}
:root[data-theme="dark"]{color-scheme:dark;--paper:#20231f;--ink:#eeeade;--muted:#b8baad;--line:#4c5146;--red:#e4a18a}
[data-theme="dark"] .artwork-icon{filter:brightness(0) saturate(100%) invert(89%) sepia(12%) saturate(220%) hue-rotate(8deg)}
[data-theme="dark"] .artwork-image{mix-blend-mode:normal}
[data-theme="dark"] kbd{background:#30362d}
[data-theme="dark"] .detail-context{background:#2b3128}
[data-theme="dark"] ::selection{background:#755a46}
.preferences{display:flex;gap:8px;flex-shrink:0}
.preferences button{background:transparent;border:1px solid var(--line);border-radius:6px;padding:7px 12px;min-height:40px;font-size:13px}
.preferences button:hover{border-color:var(--ink)}
.masthead{gap:18px;flex-wrap:wrap;height:auto;min-height:76px;padding:12px 0}
.header-period{margin-left:auto}.header-caption{display:none}
html[lang="en"] .event-name{line-height:1.35}
@media(max-width:650px){.masthead{gap:6px 14px}.wordmark{font-size:13px}.header-period{font-size:12px}.preferences{width:100%;justify-content:center;margin-bottom:3px}.preferences button{min-height:38px;padding:5px 16px}.play-guide strong{font-size:20px}.wordmark{max-width:75%}.brand-mark{flex-shrink:0}}