:root {
  --bg: #0A0F1A;
  --bg-card: #111827;
  --text: #E0E4F0;
  --text-sec: #8B92A8;
  --text-muted: #3E4560;
  --primary: #546DE5;
  --secondary: #778BEB;
  --accent: #F8A5C2;
  --border: rgba(84,109,229,0.06);
  --radius: 12px;
  --font: 'Inter',system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh}

.header{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;background:var(--bg-card);border-bottom:1px solid var(--border)}
.header h1{font-size:.9rem;font-weight:700;color:var(--primary)}
.header-right{display:flex;align-items:center;gap:6px}

.support-badge{padding:3px 8px;border-radius:6px;font-size:.6rem;font-weight:600}
.support-badge.yes{background:rgba(16,185,129,.1);color:#10B981}
.support-badge.no{background:rgba(239,68,68,.1);color:#EF4444}

.btn{padding:5px 12px;border:1px solid var(--border);border-radius:8px;background:transparent;color:var(--text-sec);font-family:var(--font);font-size:.7rem;cursor:pointer;transition:.2s}
.btn:hover{border-color:var(--primary);color:var(--primary)}
.btn.primary{background:var(--primary);color:#fff;border:none;font-weight:600}
.btn.accent{border-color:var(--accent);color:var(--accent)}

.app{max-width:1100px;margin:0 auto;padding:10px}

.grid-3{display:grid;grid-template-columns:240px 1fr 280px;gap:8px}

.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:10px}
.card h2{font-size:.64rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}

.form-group{margin-bottom:6px}
.form-group label{display:block;font-size:.6rem;color:var(--text-sec);margin-bottom:2px}
.input{width:100%;padding:5px 8px;border:1px solid var(--border);border-radius:6px;background:rgba(255,255,255,.02);color:var(--text);font-family:var(--font);font-size:.74rem}
.input:focus{outline:none;border-color:var(--primary)}
.range{width:100%;accent-color:var(--primary)}
.range-val{font-size:.62rem;color:var(--accent)}

/* Groups */
.group-tag{display:inline-flex;align-items:center;gap:4px;padding:2px 6px;border-radius:4px;background:rgba(84,109,229,.08);color:var(--secondary);font-size:.62rem;margin:2px}
.group-tag .x{cursor:pointer;opacity:.5}
.group-tag .x:hover{opacity:1}

/* Preview */
.preview-card{display:flex;flex-direction:column}
.preview-stage{flex:1;min-height:200px;background:rgba(0,0,0,.2);border-radius:8px;display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}

.preview-box{padding:16px 20px;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:10px;transition-property:all;cursor:pointer;min-width:120px;text-align:center}
.preview-box.state-b{transform:translateX(60px) scale(0.8);border-radius:20px;background:linear-gradient(135deg,var(--accent),var(--primary))}
.preview-title{font-size:.82rem;font-weight:700;color:#fff;margin-bottom:2px}
.preview-text{font-size:.62rem;color:rgba(255,255,255,.7)}

.preview-controls{display:flex;align-items:center;gap:8px;margin-top:6px}
.state-label{font-size:.66rem;color:var(--text-muted)}

/* Code */
.code-output{background:rgba(0,0,0,.3);padding:8px;border-radius:6px;font-family:'JetBrains Mono',monospace,'Courier New';font-size:.66rem;line-height:1.6;color:var(--text-sec);overflow-x:auto;white-space:pre-wrap;max-height:200px;overflow-y:auto}

@media(max-width:800px){
  .grid-3{grid-template-columns:1fr;gap:6px}
}