:root{--bg: #15171c;--panel: #1b1e24;--line: #2b3039;--text: #e7e9ee;--muted: #8d94a3;--accent: #4f8cff;font-family:system-ui,-apple-system,Segoe UI,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0}.app{display:grid;grid-template-columns:340px 1fr;height:100vh}.panel{background:var(--panel);border-right:1px solid var(--line);overflow-y:auto;padding:16px}h1{font-size:20px;margin:0 0 12px}.brand{margin:0 0 2px;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}h2{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 8px}section{border-top:1px solid var(--line);padding:14px 0}.drop{display:grid;place-items:center;min-height:160px;border:1.5px dashed var(--line);border-radius:10px;cursor:pointer;margin-bottom:12px;color:var(--muted);font-size:14px;text-align:center;padding:8px;background:repeating-conic-gradient(#20242b,#20242b 25%,#1b1e24 0%,#1b1e24 50%) 50% / 16px 16px}.drop input{display:none}.preview{max-width:100%;max-height:220px;image-rendering:auto}.status{color:#ffcf66;font-size:13px;margin:0 0 8px}.hint{color:var(--muted);font-size:12px;margin:6px 0 0}.field{display:block;margin:10px 0;font-size:13px}.field span{display:flex;justify-content:space-between;margin-bottom:4px}.field b{font-weight:500;color:var(--muted)}.field input{width:100%;accent-color:var(--accent)}.segmented{display:flex;background:var(--bg);border-radius:8px;padding:3px;gap:3px}.segmented button{flex:1;border:0;background:none;color:var(--muted);padding:6px;border-radius:6px;cursor:pointer;font:inherit;font-size:13px}.segmented button.on{background:var(--line);color:var(--text)}.swatches{display:grid;gap:6px;margin-top:8px}.swatch{display:flex;align-items:center;gap:10px;font-size:13px}.swatch span{flex:1}.swatch small{color:var(--muted)}.swatch label{color:var(--muted);font-size:12px;display:flex;gap:4px;align-items:center}input[type=color]{width:30px;height:24px;border:1px solid var(--line);border-radius:5px;background:none;padding:0;cursor:pointer}.check{display:flex;gap:8px;font-size:13px;align-items:center;margin-top:8px}.export button{width:100%;padding:10px;border:0;border-radius:8px;background:var(--accent);color:#fff;font:inherit;font-weight:600;cursor:pointer;margin-top:8px}.export button:disabled{opacity:.4;cursor:default}.export .row{display:flex;gap:8px}.export button.ghost{background:var(--line);color:var(--text);font-weight:500;font-size:13px}main{position:relative;min-width:0}.viewer{position:absolute;top:0;right:0;bottom:0;left:0}.empty{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;color:var(--muted);pointer-events:none}.about{max-width:760px;margin:0 auto;padding:48px 20px 32px;line-height:1.6}.about section{border:0;padding:0 0 32px}.about h2{font-size:22px;text-transform:none;letter-spacing:0;color:var(--text);margin:0 0 14px}.about ol{padding-left:20px;margin:0}.about li{margin-bottom:8px}.about details{border-top:1px solid var(--line);padding:12px 0}.about summary{cursor:pointer;font-weight:600}.about details p{margin:8px 0 0;color:var(--muted)}.about footer{color:var(--muted);font-size:13px;border-top:1px solid var(--line);padding-top:16px}@media (max-width: 760px){.app{grid-template-columns:1fr;grid-template-rows:55vh auto;height:auto}.app main{order:-1;height:55vh}.panel{border-right:0;border-top:1px solid var(--line);overflow:visible}}