:root {
  --bg: #0F172A;
  --bg-card: #1E293B;
  --text: #CBD5E1;
  --text-sec: #94A3B8;
  --text-muted: #475569;
  --primary: #6366F1;
  --secondary: #8B5CF6;
  --accent: #22D3EE;
  --green: #34D399;
  --amber: #FBBF24;
  --red: #F87171;
  --border: rgba(99,102,241,0.06);
  --radius: 12px;
  --font: 'Inter',system-ui,sans-serif;
  --mono: 'JetBrains Mono',monospace;
}

*,*::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:.84rem;font-weight:700;color:var(--primary)}
.header-right{display:flex;align-items:center;gap:4px}

.btn{padding:4px 10px;border:1px solid var(--border);border-radius:8px;background:transparent;color:var(--text-sec);font-family:var(--font);font-size:.66rem;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}

.app{max-width:800px;margin:0 auto;padding:12px}

.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:12px;margin-bottom:8px}
.card h2{font-size:.6rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}

.input{padding:4px 8px;border:1px solid var(--border);border-radius:6px;background:rgba(255,255,255,.02);color:var(--text);font-family:var(--font);font-size:.7rem}
.input:focus{outline:none;border-color:var(--primary)}
.sel{width:auto}

.services-row{display:flex;flex-wrap:wrap;gap:4px}
.service-tag{display:flex;align-items:center;gap:4px;padding:3px 8px;border-radius:6px;background:rgba(99,102,241,.08);border:1px solid rgba(99,102,241,.15);font-size:.66rem;color:var(--accent)}
.service-tag .remove{cursor:pointer;color:var(--text-muted);font-size:.68rem}

.step-form{display:flex;gap:4px;flex-wrap:wrap;align-items:center}
.step-form .input{flex:1;min-width:60px}

.step-item{display:flex;align-items:center;gap:6px;padding:4px 0;border-bottom:1px solid var(--border);font-size:.68rem}
.step-item:last-child{border:none}
.step-from,.step-to{color:var(--accent);font-weight:500}
.step-arrow{color:var(--text-muted)}
.step-label-text{color:var(--text-sec);font-family:var(--mono);font-size:.62rem}
.step-remove{cursor:pointer;color:var(--text-muted);margin-left:auto;font-size:.74rem}
.step-note{color:var(--amber);font-style:italic;font-size:.64rem}

/* Preview */
.preview-area{min-height:120px;overflow-x:auto}
.preview-area svg{width:100%;min-height:120px}

/* Output */
.output-tabs{display:flex;gap:2px;margin-bottom:6px}
.tab{padding:3px 8px;border:1px solid var(--border);border-radius:5px;background:transparent;color:var(--text-sec);font-family:var(--font);font-size:.6rem;cursor:pointer}
.tab.active{background:rgba(99,102,241,.1);color:var(--primary);border-color:rgba(99,102,241,.15)}
.output-code{background:rgba(0,0,0,.3);border:1px solid var(--border);border-radius:8px;padding:10px;font-family:var(--mono);font-size:.62rem;color:var(--green);overflow-x:auto;white-space:pre;min-height:60px;line-height:1.5}

@media(max-width:600px){.step-form{flex-direction:column}.step-form .input{width:100%}}