:root{--paper:#f5f2e9;--ink:#273c36;--muted:#788078;--line:#d6d8cc;--accent:#557565;--warm:#bb6249;--mono:ui-monospace,SFMono-Regular,monospace}
*{box-sizing:border-box}body{margin:0;min-width:320px;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif}button,input,select{font:inherit}a{color:inherit}button,select,.import{cursor:pointer}button{color:inherit}button:disabled{opacity:.55;cursor:wait}button:hover:not(:disabled),.import:hover{background:#e4e9de}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible,.import:focus-within{outline:2px solid var(--warm);outline-offset:3px}[hidden]{display:none!important}.shell{max-width:1460px;margin:auto;padding:0 42px}.topbar{height:80px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{text-decoration:none;font-size:22px;font-weight:650;letter-spacing:3px}.brand small{font:9px var(--mono);letter-spacing:1px;color:var(--muted);margin-left:10px}.topbar nav{display:flex;gap:24px;font-size:11px;align-items:center}.topbar nav a{text-decoration:none}.topbar nav span{color:var(--muted)}.intro{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding:44px 0 32px}.eyebrow{font:9px/1.5 var(--mono);letter-spacing:1.8px;color:var(--accent);margin:0 0 10px}.intro h1{font:500 clamp(28px,3.5vw,48px)/1.4 "Songti SC",serif;letter-spacing:1px;margin:0}.intro em{font-style:normal;color:var(--warm)}.intro>p{font-size:12px;line-height:1.9;color:var(--muted);margin:0 0 4px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 330px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.gallery{min-width:0;padding:25px 30px 20px 0}.work-heading,.work-caption{display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:11px}.work-heading{margin-bottom:18px}.work-heading>span:first-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.work-heading>span:last-child{color:var(--muted);white-space:nowrap;font:9px var(--mono)}.frame{position:relative;background:#eee9db;border:1px solid #ded9c9;padding:16px;box-shadow:0 9px 24px #3943320a}.frame #artwork{aspect-ratio:4/3}.frame #artwork svg{display:block;width:100%;height:100%}#listeningOverlay{position:absolute;inset:16px;width:calc(100% - 32px);height:calc(100% - 32px);pointer-events:none}.work-caption{color:var(--muted);font:9px var(--mono);margin:15px 0 24px}.player{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.primary{background:var(--ink);border:1px solid var(--ink);color:#f8f5e9;padding:11px 18px;font-size:11px}.primary:hover:not(:disabled){background:#405a4e}.player #play{display:flex;gap:10px;align-items:center;min-width:165px}.player label{display:flex;align-items:center;gap:5px;font-size:10px}.player input{accent-color:var(--accent)}.player output{margin-left:auto;font:10px var(--mono);color:var(--muted)}.quiet{border:1px solid var(--line);background:transparent;padding:9px 13px}.seek{display:block;width:100%;margin:18px 0 0;accent-color:var(--warm)}.play-status{font-size:10px;line-height:1.7;min-height:17px;color:var(--muted);margin:10px 0 0}.controls{border-left:1px solid var(--line);padding:26px 0 24px 28px}.controls h2{font:500 22px "Songti SC",serif;margin:0 0 23px}.field-label{display:block;font-size:10px;color:var(--muted);margin:0 0 7px}select{display:block;width:100%;max-width:100%;padding:10px 28px 10px 10px;border:1px solid var(--line);background:transparent;color:var(--ink);font-size:11px}.hint{color:var(--muted);font-size:10px;line-height:1.8;margin:9px 0 15px}.compact{font-size:9px;margin:8px 0 20px}.import-row{display:flex;gap:8px}.import{flex:1;text-align:center;border:1px solid var(--line);padding:9px 5px;font-size:10px}fieldset{border:0;padding:0;margin:0 0 19px}legend{font-size:10px;color:var(--muted);margin-bottom:8px;padding:0}.style-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px}.style-tabs button{border:1px solid var(--line);background:transparent;text-align:left;padding:12px 10px;font-size:11px}.style-tabs button[aria-pressed=true]{border-color:var(--accent);background:#e7ece2}.style-tabs small{display:block;font-size:8px;color:var(--muted);margin-top:8px}.style-icon{display:block;font-size:24px;color:var(--warm);line-height:1;margin-bottom:12px}.fields{display:grid;grid-template-columns:1.2fr 1fr;gap:12px}.arrange{display:flex;justify-content:space-between;gap:10px;align-items:center;border:0;border-bottom:1px solid var(--line);background:transparent;width:100%;text-align:left;padding:16px 0;margin-bottom:18px;font-size:10px}.arrange span{font-size:8px;color:var(--muted)}.audio-choice{margin-bottom:18px}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:17px;margin:0 0 21px}.metrics dt{font-size:9px;color:var(--muted);margin-bottom:5px}.metrics dd{margin:0;font:11px var(--mono)}.exports{display:flex;gap:7px}.exports button{border:1px solid var(--line);background:transparent;font-size:10px;padding:10px 12px}.exports button.primary{flex:1;background:var(--ink);color:var(--paper);border-color:var(--ink)}.explanation{display:grid;grid-template-columns:1fr 1fr;gap:70px;padding:32px 0 26px}.explanation h3{font:500 17px "Songti SC",serif;margin:0 0 10px}.explanation p:not(.eyebrow){font-size:11px;color:var(--muted);line-height:1.9;margin:0}.explanation p.small{font-size:9px;margin-top:9px}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;padding:19px 0 25px;font-size:9px;color:var(--muted)}footer a{text-decoration:none}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:12px 20px;font-size:11px;line-height:1.7;max-width:90%;z-index:30}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.exports a{border:1px solid var(--line);padding:10px 12px;font-size:10px;text-decoration:none}.exports a:hover{background:#e4e9de}.export-result{border-top:1px solid var(--line);padding-top:14px;margin-bottom:18px}.export-result a{font-size:10px;text-decoration:none}.export-result img{display:block;width:100%;height:auto;margin-top:10px;border:1px solid var(--line)}.export-result p{font-size:9px;color:var(--muted);margin-bottom:0}
@media(min-width:1100px){.frame{padding:24px}#listeningOverlay{inset:24px;width:calc(100% - 48px);height:calc(100% - 48px)}}
@media(max-width:950px){.shell{padding:0 24px}.workspace{grid-template-columns:minmax(0,1fr) 290px}.controls{padding-left:20px}.gallery{padding-right:22px}.intro h1{font-size:34px}.intro>p{font-size:11px}.explanation{gap:35px}}
@media(max-width:740px){.shell{padding:0 18px}.topbar{height:66px}.brand small{display:none}.topbar nav{gap:12px;font-size:9px}.intro{display:block;padding:28px 0 25px}.intro h1{font-size:32px}.intro>p{margin-top:14px}.workspace{grid-template-columns:1fr}.gallery{padding:22px 0}.controls{border-left:0;border-top:1px solid var(--line);padding:25px 0 10px}.controls h2{margin-bottom:18px}.style-tabs small{font-size:9px}.explanation{grid-template-columns:1fr;gap:25px;padding-top:27px}.player{gap:9px}.player output{font-size:9px}.frame{padding:12px}#listeningOverlay{inset:12px;width:calc(100% - 24px);height:calc(100% - 24px)}.work-caption{margin-bottom:19px}}