:root{--bg:#0D1117;--bg2:#161B22;--bg3:#21262D;--border:rgba(162,155,254,0.15);--border2:rgba(162,155,254,0.35);--t1:#F0F6FC;--t2:#8B949E;--t3:#6E7681;--primary:#A29BFE;--secondary:#6C63FF;--accent:#FF6B9D;--green:#4ADE80;--r:8px;--tr:0.2s ease;--f:'Inter',-apple-system,sans-serif;--m:'SF Mono','Fira Code',monospace}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}
body{font-family:var(--f);background:var(--bg);color:var(--t1);-webkit-font-smoothing:antialiased}
.app-container{display:flex;flex-direction:column;height:100vh}
.app-header{background:rgba(22,27,34,0.7);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:12px 20px;z-index:10;flex-shrink:0}
.header-content{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px}
.logo-group{display:flex;align-items:center;gap:12px}
.logo-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:linear-gradient(135deg,rgba(162,155,254,0.15),rgba(255,107,157,0.1));border-radius:var(--r);border:1px solid var(--border)}
h1{font-size:1.1rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.header-actions{display:flex;gap:8px;align-items:center}
.support-badge{font-size:0.72rem;padding:4px 8px;border-radius:4px;font-weight:600}
.support-yes{background:rgba(74,222,128,0.15);color:var(--green)}
.support-no{background:rgba(248,81,73,0.15);color:#F85149}
.btn{padding:8px 14px;border:none;border-radius:var(--r);font-family:var(--f);font-size:0.8rem;font-weight:600;cursor:pointer;transition:all var(--tr)}
.btn-accent{background:linear-gradient(135deg,var(--accent),#FF8EBB);color:#fff;box-shadow:0 2px 12px rgba(255,107,157,0.3)}
.btn-accent:hover{transform:translateY(-1px)}
.main-content{display:flex;flex:1;overflow:hidden}
.canvas-section{flex:1;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:20px}
.demo-canvas{position:relative;width:100%;height:100%;background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);background-image:radial-gradient(rgba(162,155,254,0.06) 1px,transparent 1px);background-size:20px 20px}
.anchor-element{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:linear-gradient(135deg,rgba(162,155,254,0.15),rgba(162,155,254,0.25));border:2px solid var(--primary);border-radius:8px;color:var(--t1);font-size:0.82rem;font-weight:600;display:flex;align-items:center;justify-content:center;cursor:move;user-select:none;z-index:2}
.target-element{position:absolute;background:linear-gradient(135deg,rgba(255,107,157,0.12),rgba(255,107,157,0.22));border:2px solid var(--accent);border-radius:8px;color:var(--t1);font-size:0.78rem;font-weight:600;display:flex;align-items:center;justify-content:center;z-index:1;pointer-events:none;padding:8px 12px;transition:top 0.3s ease,left 0.3s ease}
.controls-panel{width:320px;min-width:260px;display:flex;flex-direction:column;border-left:1px solid var(--border);flex-shrink:0;overflow-y:auto}
.panel-header{padding:8px 16px;background:var(--bg2);border-bottom:1px solid var(--border)}
.panel-title{font-size:0.75rem;font-weight:600;text-transform:uppercase;letter-spacing:0.08em;color:var(--t3)}
.controls-body{padding:12px 16px;display:flex;flex-direction:column;gap:16px}
.ctrl-group{display:flex;flex-direction:column;gap:4px}
.ctrl-group label{font-size:0.78rem;color:var(--t3);font-weight:600}
.ctrl-select{padding:6px 10px;background:var(--bg3);border:1px solid var(--border);border-radius:6px;color:var(--t1);font-family:var(--f);font-size:0.82rem}
.ctrl-range{appearance:none;height:4px;background:var(--bg3);border-radius:2px;outline:none}
.ctrl-range::-webkit-slider-thumb{appearance:none;width:14px;height:14px;border-radius:50%;background:var(--primary);cursor:pointer}
.ctrl-val{font-family:var(--m);font-size:0.72rem;color:var(--t3)}
.code-preview{padding:12px;background:var(--bg);border:1px solid var(--border);border-radius:var(--r);font-family:var(--m);font-size:0.78rem;line-height:1.7;color:var(--t2);white-space:pre-wrap;margin:0;overflow:auto;max-height:240px}
@media(max-width:768px){.main-content{flex-direction:column}.controls-panel{width:100%;max-height:40vh;border-left:none;border-top:1px solid var(--border)}}