:root{--bg: #101220;--panel: #1c2033;--line: #313a55;--ink: #eef0fa;--dim: #9aa3c6;--accent: #5a7ad0;--ok: #62d98a;--bad: #e0654a}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#1a1e34,var(--bg));color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,sans-serif;display:flex;justify-content:center;-webkit-user-select:none;user-select:none}#app{width:100%;max-width:600px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:26px;letter-spacing:4px;font-weight:800;color:var(--accent)}.sub{margin:2px 0 0;color:var(--dim);font-size:13px}.bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;margin:9px 0}.seg{display:inline-flex;background:var(--panel);border:1px solid var(--line);border-radius:999px;overflow:hidden}.seg button{background:none;border:none;color:var(--dim);padding:6px 13px;font:600 13px system-ui;cursor:pointer}.seg button.active{background:var(--accent);color:#0c1022}.btn{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:7px 14px;border-radius:999px;font:700 13px system-ui;cursor:pointer}.btn:hover{border-color:var(--accent)}.btn:disabled{opacity:.4;cursor:default}.btn.submit{display:block;margin:14px auto 0;padding:10px 26px;background:var(--accent);color:#0c1022;border-color:var(--accent)}.status{text-align:center;min-height:20px;margin:6px 0;color:var(--dim);font-size:12.5px;font-weight:600}.swatches{display:flex;gap:14px;justify-content:center;margin:8px 0}.swatch{position:relative;flex:1;max-width:250px;height:130px;border-radius:12px;border:1px solid var(--line);box-shadow:0 10px 28px #00000080}.swatch span{position:absolute;left:8px;bottom:6px;font-size:11px;font-weight:700;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.8);letter-spacing:1px;text-transform:uppercase}.sliders{margin:8px 0 4px}.srow{display:grid;grid-template-columns:28px 1fr 44px;align-items:center;gap:10px;margin:8px 0}.srow label{font-weight:800;color:var(--accent);text-align:center}.srow output{font-variant-numeric:tabular-nums;color:var(--dim);text-align:right;font-size:13px}input[type=range]{width:100%;accent-color:var(--accent);cursor:pointer}.overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:#080a14b8;backdrop-filter:blur(3px);z-index:10}.overlay.hidden{display:none}.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 26px;text-align:center;max-width:340px}.card h2{margin:0 0 6px;font-size:24px;color:var(--ok)}.card p{margin:6px 0;color:var(--dim);font-size:14px}.card .row{display:flex;gap:8px;justify-content:center;margin-top:14px}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:12px}