:root{--bg:#f6f5f2;--fg:#222;--muted:#666;--panel:#fff;--line:#d9d6cf;--accent:#2f6f5e;--warn:#a15c00}@media (prefers-color-scheme:dark){:root{--bg:#17181a;--fg:#e8e6e1;--muted:#9a978f;--panel:#222427;--line:#3a3d41;--accent:#5cb89f;--warn:#e0a64a}}*{box-sizing:border-box}body{background:var(--bg);color:var(--fg);margin:0;font:15px/1.6 system-ui,Hiragino Sans,Noto Sans JP,sans-serif}header,main{max-width:1100px;margin:0 auto;padding:0 16px}header h1{margin:24px 0 4px;font-size:22px}header p{color:var(--muted);margin:0 0 16px}main{grid-template-columns:380px 1fr;align-items:start;gap:16px;padding-bottom:32px;display:grid}@media (width<=800px){main{grid-template-columns:1fr}.preview{order:-1}}.panel,.preview{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:16px}.preview{position:sticky;top:8px}canvas{background:repeating-conic-gradient(#8884 0 25%, transparent 0 50%) 0 0 / 16px 16px;max-width:100%;height:auto;margin:0 auto;display:block}.drop{border:2px dashed var(--line);text-align:center;cursor:pointer;color:var(--muted);border-radius:8px;padding:20px;display:block}.drop.over{border-color:var(--accent);color:var(--fg)}fieldset{border:1px solid var(--line);border-radius:8px;margin:12px 0 0;padding:8px 12px 12px}legend{color:var(--muted);padding:0 6px}fieldset label{align-items:center;gap:8px;margin:6px 0;display:flex}fieldset label>input[type=range],fieldset label>input[type=text],fieldset label>select{flex:1;min-width:0}.row{flex-wrap:wrap;gap:4px 16px;display:flex}.row label{margin:0}.anchors{grid-template-columns:repeat(3,32px);gap:4px;margin:6px 0;display:grid}.anchors button{height:32px;padding:0}.anchors button[aria-pressed=true]{background:var(--accent);border-color:var(--accent)}button{font:inherit;border:1px solid var(--line);background:var(--panel);color:var(--fg);cursor:pointer;border-radius:6px;padding:6px 12px}#export{background:var(--accent);border-color:var(--accent);color:#fff;width:100%;margin-top:8px;padding:10px}button:disabled{opacity:.5;cursor:not-allowed}progress{width:100%}.note,#status{color:var(--muted);margin:6px 0 0;font-size:13px}#list{margin:8px 0 0;padding:0;font-size:13px;list-style:none}#list li{justify-content:space-between;gap:8px;padding:2px 0;display:flex}#list .warn{color:var(--warn)}[hidden]{display:none!important}