:root{--bg:#f5f6f8;--panel:#fff;--text:#23282e;--muted:#6b7280;--accent:#2f7de1;--accent-2:#37d4ae;--danger:#d64541;--radius:12px}*{box-sizing:border-box}[hidden]{display:none!important}body{background:var(--bg);color:var(--text);margin:0;font-family:Noto Sans JP,Hiragino Sans,Yu Gothic,sans-serif}.container{max-width:960px;margin:0 auto;padding:16px}header.site{align-items:center;gap:12px;display:flex}header.site .logo{border-radius:8px;display:block}header.site h1{margin:8px 0;font-size:1.4rem}header.site .tagline{color:var(--muted);font-size:.85rem}nav.steps{gap:4px;margin:12px 0;display:flex;overflow-x:auto}nav.steps button{border-radius:var(--radius) var(--radius) 0 0;min-width:96px;color:var(--text);cursor:pointer;background:#dde3ea;border:none;flex:1;padding:8px 4px;font-size:.8rem}nav.steps button.current{background:var(--accent);color:#fff;font-weight:700}nav.steps button:disabled{opacity:.45;cursor:not-allowed}section.panel{background:var(--panel);border-radius:0 0 var(--radius) var(--radius);padding:16px;box-shadow:0 1px 4px #00000014}.zones{grid-template-columns:1fr;gap:12px;display:grid}@media (width>=640px){.zones{grid-template-columns:1fr 1fr}}.dropzone{border-radius:var(--radius);text-align:center;cursor:pointer;border:2px dashed #b8c2cf;padding:16px}.dropzone.dragover{border-color:var(--accent);background:#eef5fd}.dropzone h3{margin:0 0 4px;font-size:1rem}.dropzone .hint{color:var(--muted);margin:4px 0;font-size:.8rem}.dropzone input[type=file]{display:none}.status{color:var(--accent);font-size:.8rem}.dropzone-thumb{margin:8px 0 4px;line-height:0;display:block}.dropzone-thumb img{border-radius:8px;max-width:100%;max-height:140px;box-shadow:0 1px 4px #00000026}.error{color:var(--danger);min-height:1.2em;font-size:.85rem}.caution{border-radius:var(--radius);color:#6b5b1e;background:#fff8e6;margin-top:12px;padding:10px 12px;font-size:.8rem}.actions{flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px;display:flex}button.primary{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:999px;padding:10px 24px;font-size:.95rem}button.secondary{color:var(--text);cursor:pointer;background:#e7ebf0;border:none;border-radius:999px;padding:10px 20px;font-size:.9rem}button.primary:disabled,button.secondary:disabled{opacity:.45;cursor:not-allowed}.spinner{border:2px solid #c6cdd6;border-top-color:var(--accent);vertical-align:-2px;border-radius:50%;width:14px;height:14px;margin-right:8px;animation:.8s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.progress{align-items:center;gap:10px;margin:8px 0 4px;display:flex}.progress-track{background:#e3e8ee;border-radius:999px;flex:1;height:8px;overflow:hidden}.progress-bar{background:var(--accent);border-radius:999px;width:0%;height:100%;transition:width .2s}.progress-label{color:var(--muted);text-align:right;min-width:7em;font-size:.8rem}.cutout-options{flex-wrap:wrap;gap:12px;margin-top:12px;display:flex}.cutout-card{border-radius:var(--radius);cursor:pointer;background:#f0f2f5;border:2px solid #0000;flex-direction:column;align-items:center;gap:6px;padding:8px;font-size:.85rem;display:flex}.cutout-card.selected{border-color:var(--accent);background:#eef5fd}.cutout-thumb{border-radius:8px;justify-content:center;align-items:center;min-width:120px;min-height:120px;line-height:0;display:flex;overflow:hidden}.cutout-card:disabled{cursor:default}.cutout-card:disabled .cutout-thumb{opacity:.85}.cutout-thumb.checker{background:repeating-conic-gradient(#d6dbe1 0% 25%,#fff 0% 50%) 0 0/20px 20px}#template-list{grid-template-columns:1fr;gap:12px;display:grid}@media (width>=640px){#template-list{grid-template-columns:1fr 1fr}}.template-card{border-radius:var(--radius);cursor:pointer;background:#f0f2f5;border:2px solid #0000;flex-direction:column;align-items:center;gap:6px;padding:8px;display:flex}.template-card.selected{border-color:var(--accent)}.template-thumb{border-radius:8px;line-height:0;overflow:hidden}#stage-container{touch-action:none;background:#dfe4ea;border-radius:8px;width:100%;overflow:hidden}.edit-controls{gap:8px;margin-top:12px;display:grid}.edit-controls label{color:var(--muted);gap:4px;font-size:.8rem;display:grid}.edit-controls input{border:1px solid #c6cdd6;border-radius:8px;padding:8px 10px;font-size:1rem}#output-preview{border-radius:8px;max-width:100%;box-shadow:0 1px 6px #00000026}#notice{background:var(--text);color:#fff;border-radius:999px;max-width:90vw;padding:8px 16px;font-size:.85rem;position:fixed;bottom:16px;left:50%;transform:translate(-50%)}footer.site{color:var(--muted);text-align:center;margin:24px 0 12px;font-size:.78rem}footer.site a{color:var(--accent)}