:root{color-scheme:light;--bg:#e9efe7;--ink:#294f43;--line:#b8c9ba;--accent:#28674f}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,'PingFang SC','Microsoft YaHei',sans-serif}main{max-width:1480px;margin:auto}header{position:relative;z-index:2;display:flex;align-items:center;gap:20px;padding:32px 5% 12px}header p{margin:0 0 9px;font-size:11px;letter-spacing:.25em;color:#77877d}h1{font-size:23px;font-weight:600;letter-spacing:.06em;margin:0}.back{color:var(--ink);text-decoration:none;border:1px solid #c8d4c8;border-radius:50%;width:42px;height:42px;display:grid;place-items:center;font-size:24px}.edition{margin-left:auto;font-size:10px;letter-spacing:.15em;color:#83968a}#stage{height:min(68vh,720px);min-height:420px;position:relative}canvas{width:100%;height:100%;display:block;touch-action:none;cursor:grab}canvas:active{cursor:grabbing}.stage-label{position:absolute;left:5%;right:5%;bottom:18px;display:flex;justify-content:space-between;pointer-events:none;font-size:12px;color:#748c7d;letter-spacing:.08em}.controls{position:relative;padding:20px 5% 14px;border-top:1px solid #c7d4c8;background:#f5faf5b3}.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:14px}button,select{font:inherit;font-size:14px;color:var(--ink);border:1px solid var(--line);border-radius:14px;background:#f8fcf680;padding:13px 18px;cursor:pointer;min-height:46px}button:hover{border-color:var(--accent);background:#fff9}button.primary,button[aria-pressed=true]{color:#fff;background:var(--accent);border-color:var(--accent)}:focus-visible{outline:3px solid #479c76;outline-offset:4px}input{accent-color:var(--accent);width:150px}output{min-width:40px;font-size:13px}.hint{font-size:12px;line-height:1.8;color:#7b8d80;margin:0}footer{padding:12px 5% 24px;color:#839184;font-size:11px;line-height:1.8}summary{cursor:pointer}a{color:var(--accent)}#loading,#error{position:absolute;top:45%;left:10%;right:10%;text-align:center;font-size:14px}#error{padding:22px;background:#f5faf5;z-index:4}[hidden]{display:none!important}@media(min-width:850px){.controls{display:flex;flex-wrap:wrap;gap:10px 32px}.hint{flex-basis:100%}.row{margin:0}.controls .row+ .row{margin-left:auto}}@media(max-width:600px){header{padding:22px 20px 5px;gap:12px}header p{font-size:10px}h1{font-size:19px}.edition{display:none}#stage{height:62svh;min-height:390px;max-height:660px}.controls{padding:16px 18px}.row{gap:8px}button,select{font-size:13px;padding:12px 13px}.row label{font-size:13px}input{width:82px}.stage-label{left:20px;right:20px;font-size:11px}.stage-label span:last-child{display:none}footer{padding:10px 20px 20px}}