:root{--font-sans:'Inter',-apple-system,sans-serif;--radius:12px;--transition:0.2s ease}
[data-theme="dark"]{--bg:#0F0F1A;--bg-card:rgba(26,26,46,0.95);--bg-input:rgba(99,102,241,0.05);--border:rgba(99,102,241,0.12);--text:#E8E4F0;--text2:#A0A0C0;--text3:#6060A0;--primary:#6366F1;--gradient:linear-gradient(135deg,#6366F1,#8B5CF6)}
*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);min-height:100vh}
.app{max-width:900px;margin:0 auto}.header{padding:16px 24px;border-bottom:1px solid var(--border)}
.header h1{font-size:1rem;font-weight:700;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.btn{font-family:var(--font-sans);font-size:.82rem;font-weight:500;padding:8px 16px;border-radius:8px;border:none;cursor:pointer;transition:all var(--transition)}
.btn-primary{background:var(--gradient);color:#fff}.btn-primary:hover{transform:translateY(-1px)}
.main{display:grid;grid-template-columns:300px 1fr;gap:20px;padding:24px}
.controls{display:flex;flex-direction:column;gap:10px}
.label{font-size:.72rem;font-weight:600;color:var(--text3);margin-bottom:4px;display:block;text-transform:uppercase;letter-spacing:.04em}
.field{margin-bottom:4px}
input[type="text"]{width:100%;padding:8px;background:var(--bg-input);color:var(--text);border:1px solid var(--border);border-radius:6px;font-size:.82rem;outline:none;font-family:var(--font-sans)}
input[type="file"]{font-size:.82rem;color:var(--text2)}
input[type="range"]{width:100%;accent-color:var(--primary)}
input[type="color"]{width:40px;height:30px;border:none;background:none;cursor:pointer}
.row{display:flex;gap:12px;align-items:flex-end}
.canvas-wrap{display:flex;align-items:center;justify-content:center}
canvas{border:1px solid var(--border);border-radius:var(--radius);max-width:100%;background:#111}
@media(max-width:600px){.main{grid-template-columns:1fr}}