:root{color-scheme:light;--paper:#f4f0e7;--surface:#fffdf7;--ink:#302b23;--muted:#80735f;--line:#ddd4c5;--brown:#573920;--gold:#b47d3b}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'Microsoft YaHei','PingFang SC',sans-serif}button,input,select,textarea{font:inherit}button,a,label,input,select,textarea{-webkit-tap-highlight-color:transparent}button{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:6px;min-height:40px;padding:9px 13px;cursor:pointer}button:hover{border-color:var(--gold)}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #b47d3b;outline-offset:3px}button[aria-pressed=true]{background:var(--brown);color:#fff8e8;border-color:var(--brown)}[hidden]{display:none!important}a{color:inherit;text-decoration:none}.topbar{max-width:1500px;margin:auto;padding:20px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px}.brand-mark{display:grid;place-items:center;width:43px;height:43px;background:var(--brown);color:#fff6df;font:30px serif;border-radius:7px}.brand strong{display:block;font-size:19px}.brand small{display:block;color:var(--muted);font-size:10px;letter-spacing:.08em;margin-top:5px}.topbar nav{display:flex;gap:20px;align-items:center;font-size:12px}.home-link{padding:11px 15px;background:#e8ddc7;border-radius:6px;color:var(--brown)}.studio{max-width:1450px;padding:32px;margin:auto;display:grid;grid-template-columns:340px minmax(0,1fr);gap:44px}.section-heading,.stage-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.eyebrow{font-size:10px;letter-spacing:.16em;color:var(--gold);font-weight:700;margin:0 0 10px}h1{font-size:25px;letter-spacing:-.04em;margin:0}h2{font-size:21px;margin:0;font-weight:600}.count{font-size:11px;color:var(--muted);white-space:nowrap}.intro,.hint{font-size:11px;line-height:1.8;color:var(--muted)}.intro{margin:16px 0 22px}.upload{position:relative;display:flex;align-items:center;flex-wrap:wrap;gap:8px 13px;background:var(--surface);border:1px dashed #bfb094;border-radius:8px;padding:21px;cursor:pointer;margin-bottom:24px}.upload>span{font-size:25px;color:var(--gold)}.upload strong{font-size:14px}.upload small{flex-basis:100%;font-size:10px;color:var(--muted)}.upload input{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}.upload:focus-within{outline:3px solid var(--gold);outline-offset:3px}fieldset{padding:0;border:0;margin:0 0 10px}legend{font-size:12px;font-weight:600;margin-bottom:12px}.layout-choices{display:grid;grid-template-columns:1fr 1fr;gap:8px}.layout-choices button{text-align:left;padding:13px 14px}.layout-choices strong,.layout-choices small{display:block}.layout-choices strong{font-size:12px}.layout-choices small{font-size:10px;margin-top:5px;opacity:.72}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:18px 0;font-size:12px}select{border:1px solid var(--line);background:var(--surface);padding:9px;border-radius:5px;min-height:40px;max-width:70%;color:var(--ink)}.options{margin:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0}.options summary{cursor:pointer;font-size:12px;font-weight:600}.options summary span{font-weight:400;font-size:10px;color:var(--muted);margin-left:8px}.options[open] summary{margin-bottom:20px}.theme-choices{display:grid;grid-template-columns:repeat(3,1fr);gap:5px}.theme-choices button{font-size:11px}.field{display:block;font-size:11px;color:var(--muted);margin-top:15px}.field input,.field textarea{display:block;width:100%;margin-top:7px;padding:10px;border:1px solid var(--line);border-radius:5px;background:var(--surface);font-size:12px;color:var(--ink)}.check{display:flex;align-items:center;gap:8px;font-size:11px;line-height:1.7;margin:16px 0}.check input{accent-color:var(--brown)}.actions{display:flex;gap:8px;margin-top:22px}.actions button{flex:1;font-size:12px;min-height:45px}.primary{background:var(--brown);color:#fff6df;border-color:var(--brown)}#artworkStatus{font-size:11px;line-height:1.8;min-height:40px;color:var(--muted)}#artworkStatus.error{color:#a23327}#artworkStatus.success{color:#477135}.stage{min-width:0}.stage-heading{margin-bottom:20px}#outputSize{font-size:10px;color:var(--muted)}.preview-surface{background:#e8e1d5;min-height:380px;padding:24px;border-radius:9px;display:flex;justify-content:center;align-items:flex-start}.empty{align-self:center;text-align:center;padding:70px 12px}.empty>span{font-size:60px;color:#b5a58b}.empty h3{font-size:20px;font-weight:500;margin:18px 0}.empty p{font-size:12px;color:var(--muted)}.empty small{font-size:9px;color:var(--muted)}#artCanvas{display:block;max-width:100%;width:auto;height:auto;box-shadow:0 5px 20px #44331d14}.strip-heading{display:flex;gap:14px;align-items:center;margin:20px 0 10px}.strip-heading strong{font-size:11px}.strip-heading span{font-size:10px;color:var(--muted)}.strip-heading button{margin-left:auto;font-size:11px;border:0;background:transparent}.image-strip{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px}.image-item{background:var(--surface);padding:4px;border:1px solid transparent;border-radius:6px;min-width:0}.image-item.selected{border-color:var(--gold)}.image-item .select-image{display:block;padding:0;border:0;min-height:0;width:100%;position:relative;aspect-ratio:4/3;background:#e8e1d5;overflow:hidden;border-radius:3px}.image-item img{width:100%;height:100%;object-fit:cover}.image-item b{position:absolute;left:4px;top:4px;background:#302b23b0;color:white;font-size:10px;padding:3px 5px;border-radius:3px}.image-buttons{display:flex;justify-content:space-between;gap:2px;margin-top:4px}.image-buttons button{border:0;min-height:30px;padding:2px;font-size:11px;flex:1}.stage-note{font-size:10px;line-height:1.9;color:var(--muted);margin:16px 0}.focus-panel{background:#eae2d4;padding:15px;border-radius:7px;margin-top:18px}.focus-panel>strong{font-size:12px}.focus-panel label{display:flex;align-items:center;gap:12px;font-size:11px}.focus-panel input{width:100%;accent-color:var(--brown);min-height:32px}.focus-panel button{font-size:11px;margin-top:5px}footer{max-width:1450px;margin:auto;padding:20px 32px 30px;display:flex;justify-content:space-between;gap:10px;border-top:1px solid var(--line);font-size:10px;color:var(--muted)}
#artCanvas{width:100%;max-width:1080px;flex-shrink:0}
@media(min-width:1000px){.controls{align-self:start}.stage .preview-surface{max-height:760px;overflow:auto;scrollbar-gutter:stable}}
@media(max-width:900px){.studio{grid-template-columns:290px minmax(0,1fr);padding:24px;gap:24px}.topbar{padding:16px 24px}.topbar nav{gap:12px}.image-strip{grid-template-columns:repeat(3,minmax(0,1fr))}.preview-surface{padding:15px}h1{font-size:22px}}
@media(max-width:650px){.topbar{padding:13px 16px;gap:10px}.brand{gap:9px}.brand-mark{width:35px;height:35px;font-size:25px}.brand strong{font-size:16px}.brand small{font-size:8px}.topbar nav>a:not(.home-link){display:none}.home-link{font-size:10px;padding:10px}.studio{display:flex;flex-direction:column;padding:24px 16px;gap:22px}.controls{width:100%}.intro{margin:10px 0 16px}.upload{padding:15px 18px;margin-bottom:18px}.upload small{flex-basis:auto;font-size:9px}.upload strong{font-size:12px}.layout-choices{grid-template-columns:repeat(2,1fr)}.layout-choices button{padding:10px 12px}.layout-choices strong{font-size:11px}.layout-choices small{font-size:9px}.options{margin:16px 0;padding:13px 0}.actions{margin-top:15px}#artworkStatus{min-height:0;margin-bottom:0}.stage-heading{margin-bottom:13px}h1{font-size:23px}h2{font-size:18px}.preview-surface{padding:13px;min-height:250px}.empty{padding:35px 10px}.empty h3{font-size:17px}.image-strip{grid-template-columns:repeat(4,minmax(0,1fr))}.strip-heading{gap:8px}.strip-heading span{font-size:9px}.image-buttons button{min-height:34px}.eyebrow{font-size:9px}.stage-note{font-size:9px}footer{padding:18px 16px;display:block;line-height:1.8}footer a{display:block;margin-top:8px}}
@media(prefers-reduced-motion:no-preference){button{transition:background-color .15s,border-color .15s}button:active:not(:disabled){transform:translateY(1px)}}