:root{--brand:#f7631b;--brand-dark:#d9500f;--ink:#1f1f1f;--ink-soft:#4b4b4b;--muted:#8a8a8a;--line:#e6e6e6;--panel:#ffffff;--bg:#f4f4f5;--radius:14px;--shadow:0 6px 24px rgba(0,0,0,0.08);color-scheme:light}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}a{color:var(--brand)}.app{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:14px;padding:16px 24px;background:var(--ink);color:#fff}.topbar .logo{width:34px;height:34px;border-radius:9px;background:var(--brand);display:grid;place-items:center;font-weight:800;font-size:18px}.topbar h1{font-size:17px;margin:0;font-weight:700;letter-spacing:.2px}.topbar p{margin:0;font-size:12.5px;color:#c9c9c9}.layout{flex:1 1;display:grid;grid-template-columns:380px 1fr;grid-gap:0;gap:0;align-items:stretch}.sidebar{background:var(--panel);border-right:1px solid var(--line);padding:18px}.sidebar,.stage{overflow-y:auto;max-height:calc(100vh - 66px)}.stage{padding:24px}.section{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:14px;overflow:hidden}.section>header{padding:12px 14px;font-weight:700;font-size:13.5px;background:#fafafa;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:8px}.section .body{padding:14px;gap:10px}.section .body,label.field{display:flex;flex-direction:column}label.field{gap:5px;font-size:12.5px;font-weight:600;color:var(--ink-soft)}input[type=text],select,textarea{font:inherit;font-size:14px;padding:9px 11px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink);width:100%}input[type=text]:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:-1px;border-color:var(--brand)}textarea{resize:vertical;min-height:120px;line-height:1.5}.row{display:flex;gap:10px}.row>*{flex:1 1}.btn{font:inherit;font-weight:700;font-size:14px;padding:10px 16px;border-radius:10px;border:1px solid transparent;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:background .15s,opacity .15s}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-dark)}.btn-primary:disabled{opacity:.55;cursor:not-allowed}.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}.btn-ghost:hover{background:#f6f6f6}.btn-sm{padding:6px 11px;font-size:12.5px;border-radius:8px}.btn-danger{color:#c02525;border-color:#f0cccc;background:#fff}.btn-danger:hover{background:#fdf2f2}.hint{font-size:12px;color:var(--muted);margin:0}.file-drop{border:1.5px dashed var(--line);border-radius:10px;padding:14px;text-align:center;font-size:13px;color:var(--ink-soft);cursor:pointer;background:#fafafa}.file-drop:hover{border-color:var(--brand);color:var(--brand)}input[type=file]{display:none}.logo-item{display:flex;align-items:center;gap:10px;padding:8px;border:1px solid var(--line);border-radius:10px}.logo-item img{width:42px;height:42px;object-fit:contain;background:#f0f0f0;border-radius:6px}.logo-item .meta{flex:1 1;font-size:12.5px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.preview-wrap{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}.preview-toolbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:14px}.canvas-holder{position:relative;width:100%;background:repeating-conic-gradient(#f0f0f0 0 25%,#fafafa 0 50%) 50% /24px 24px;border-radius:10px;overflow:hidden}.canvas-holder canvas{display:block;width:100%;height:auto;cursor:-webkit-grab;cursor:grab}.canvas-holder canvas.dragging{cursor:-webkit-grabbing;cursor:grabbing}.seg{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden}.seg button{font:inherit;font-size:13px;font-weight:600;border:none;background:#fff;padding:8px 14px;cursor:pointer;color:var(--ink-soft)}.seg button.active{background:var(--brand);color:#fff}.progress{height:8px;background:var(--line);border-radius:99px;overflow:hidden;margin-top:4px}.progress>span{display:block;height:100%;background:var(--brand);transition:width .2s}.pill{display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border-radius:99px;background:#fff1e9;color:var(--brand-dark)}.selected-empty{font-size:12.5px;color:var(--muted);padding:4px 0}.slider-row{display:flex;align-items:center;gap:10px;font-size:12px;font-weight:600;color:var(--ink-soft)}.slider-row input[type=range]{flex:1 1;accent-color:var(--brand)}.slider-row .val{width:52px;text-align:right;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}input[type=color]{width:100%;height:38px;padding:2px;border:1px solid var(--line);border-radius:9px;background:#fff;cursor:pointer}.align-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:6px;gap:6px}.align-grid .btn{padding:7px 4px;font-size:11.5px;white-space:nowrap}.checkbox{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--ink-soft);cursor:pointer}.checkbox input{width:16px;height:16px;accent-color:var(--brand)}@media (max-width:900px){.layout{grid-template-columns:1fr}.sidebar,.stage{max-height:none}}