:root{
  --bg:#f3f5f9; --card:#fff; --ink:#18202f; --mute:#667085; --line:#dde2ec; --brand:#1d4ed8; --brand-d:#1a3fb0;
  --chip:#eef2fb; --bad:#c0292b; --ok:#0f7b4f; --radius:12px; --shadow:0 1px 2px rgba(16,24,40,.06);
}
@media (prefers-color-scheme: dark){
  :root{--bg:#0f1420; --card:#171d2c; --ink:#e8ecf5; --mute:#9aa6bd; --line:#2a3348; --brand:#6d97ff; --brand-d:#85a9ff; --chip:#1f2740; --bad:#ff7b7d; --ok:#4cc38a}
}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.top{max-width:1280px;margin:0 auto;padding:22px 20px 6px;display:flex;gap:16px;justify-content:space-between;align-items:flex-start;flex-wrap:wrap}
.top h1{margin:0;font-size:24px;letter-spacing:-.01em}
.top p{margin:4px 0 0;color:var(--mute);max-width:700px}
.badge{background:var(--chip);border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:13px;color:var(--mute)}
main{max-width:1280px;margin:0 auto;padding:12px 20px 30px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:16px;box-shadow:var(--shadow)}
.card h2{margin:0 0 14px;font-size:16px;display:flex;gap:10px;align-items:center}
.card h2 b{background:var(--brand);color:#fff;border-radius:50%;width:24px;height:24px;display:grid;place-items:center;font-size:13px}
.f{display:block;margin:0 0 12px}
.f>span{display:block;font-size:13px;color:var(--mute);margin-bottom:4px}
.f>span em{font-style:normal;opacity:.8}
input[type=text],input[type=password],input[type=number],select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;background:var(--bg);color:var(--ink);font:inherit}
input:focus,select:focus,button:focus-visible,.drop:focus-visible{outline:2px solid var(--brand);outline-offset:1px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.row{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.hint{color:var(--mute);font-size:13px;margin:2px 0 12px}
.drop{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:4px;border:2px dashed var(--line);border-radius:var(--radius);padding:26px 14px;margin:0 0 14px;cursor:pointer;color:var(--mute);transition:.15s}
.drop:hover,.drop.over{border-color:var(--brand);background:var(--chip);color:var(--ink)}
.drop.has{border-style:solid;border-color:var(--ok);color:var(--ink)}
.drop strong{color:var(--ink)}
button{font:inherit;border:1px solid var(--line);background:var(--chip);color:var(--ink);padding:10px 16px;border-radius:10px;cursor:pointer;display:inline-flex;align-items:center;gap:8px;justify-content:center}
button:hover:not([disabled]){border-color:var(--brand)}
button.primary{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
button.primary:hover:not([disabled]){background:var(--brand-d)}
button.ghost{background:transparent}
button[disabled]{opacity:.55;cursor:not-allowed}
.btns{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.btns.big button{flex:1;padding:12px 14px}
.spin{width:14px;height:14px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:r .7s linear infinite;display:none}
button.busy .spin{display:inline-block}
@keyframes r{to{transform:rotate(360deg)}}
#status{color:var(--mute);font-size:14px}
#status.err{color:var(--bad)}
#status.ok{color:var(--ok)}
.editor{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:20px;align-items:start}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}
.tabs button{padding:5px 12px;font-size:13px;border-radius:999px}
.tabs button.on{background:var(--brand);border-color:var(--brand);color:#fff}
.stage{position:relative;line-height:0;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#8a8f9b;user-select:none;-webkit-user-select:none}
#pageCanvas{width:100%;height:auto;display:block}
#overlay{position:absolute;inset:0}
.box{position:absolute;border:2px solid var(--c,#1d4ed8);background:color-mix(in srgb,var(--c,#1d4ed8) 14%,transparent);cursor:move;touch-action:none;border-radius:4px}
.box:focus-visible{outline:2px solid #fff;outline-offset:1px}
.box.sel{box-shadow:0 0 0 2px #fff,0 0 0 4px var(--c,#1d4ed8)}
.box>i{position:absolute;left:0;top:0;transform:translateY(-100%);background:var(--c,#1d4ed8);color:#fff;font:600 11px/1 system-ui;padding:3px 6px;border-radius:4px 4px 0 0;font-style:normal;white-space:nowrap}
.box>u{position:absolute;right:-8px;bottom:-8px;width:18px;height:18px;border-radius:50%;background:#fff;border:3px solid var(--c,#1d4ed8);cursor:nwse-resize;touch-action:none}
.cp{border:1px solid var(--line);border-radius:10px;padding:10px;margin-bottom:10px;border-left:5px solid var(--c)}
.cp.sel{background:var(--chip)}
.cp header{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:6px;font-weight:600}
.cp header button{padding:3px 9px;font-size:12px}
.cp .thumb{width:100%;aspect-ratio:85.6/54;background:repeating-conic-gradient(#d9dde6 0 25%,#f3f5f9 0 50%) 0 0/14px 14px;border-radius:6px;overflow:hidden;margin:6px 0}
.cp .thumb canvas{width:100%;height:100%;display:block}
.cp .ctl{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:13px;color:var(--mute)}
.cp .ctl button{padding:4px 10px;font-size:13px}
.cp .ctl select{width:auto;padding:4px 8px}
.cp input[type=range]{flex:1;min-width:90px}
.sheetbox{border:1px solid var(--line);border-radius:8px;background:#8a8f9b;padding:14px;display:grid;place-items:center}
#sheetCanvas{max-width:100%;height:auto;background:#fff;box-shadow:0 4px 18px rgba(0,0,0,.25)}
.opts{margin-bottom:6px}
.chk{display:flex;align-items:center;gap:8px;margin:2px 0 10px;cursor:pointer}
.chk input{width:17px;height:17px}
footer{max-width:1280px;margin:0 auto;padding:0 20px 40px;color:var(--mute);font-size:13px}
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;opacity:0;transition:.25s;pointer-events:none;z-index:40;max-width:90vw}
.toast.show{opacity:1}
@media (max-width:980px){.editor{grid-template-columns:1fr}}
@media (max-width:560px){.grid2,.grid3{grid-template-columns:1fr}.card{padding:14px}}