*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#D63031;--primary-light:#FF7675;--accent:#FDCB6E;
  --bg:#0B0E11;--bg-card:rgba(20,24,32,0.85);
  --bg-input:rgba(15,18,25,0.8);--text:#E8E6F0;--text-dim:#8B8AA0;
  --text-muted:#5A5872;--border:rgba(214,48,49,0.15);
  --success:#00B894;--danger:#FF6B6B;--warning:#FDCB6E;
  --radius:12px;--radius-sm:8px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
  --mono:'JetBrains Mono','SFMono-Regular','Consolas',monospace;
  --transition:250ms ease;--glass-bg:rgba(20,24,32,0.6);--glass-border:rgba(255,255,255,0.06)
}
html{font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse at 20% 15%,rgba(214,48,49,0.06) 0%,transparent 50%),radial-gradient(ellipse at 80% 80%,rgba(253,203,110,0.04) 0%,transparent 50%);pointer-events:none;z-index:0}
.app{position:relative;z-index:1}
.header{padding:1rem 1.5rem;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.5rem}
.header-brand{display:flex;align-items:center;gap:.75rem}
.header-brand h1{font-size:1rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.subtitle{font-size:.78rem;color:var(--text-dim)}
.header-actions{display:flex;align-items:center;gap:.5rem}
.badge{font-size:.72rem;padding:.2rem .55rem;border-radius:99px;font-weight:600}
.badge.supported{background:rgba(0,184,148,0.15);color:#00B894}
.badge.unsupported{background:rgba(255,107,107,0.15);color:#FF6B6B}
.main{padding:1rem 1.5rem}
.template-bar{display:flex;align-items:center;gap:.3rem;margin-bottom:1rem;flex-wrap:wrap}
.template-label{font-size:.72rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;margin-right:.25rem}
.template-btn{padding:.3rem .55rem;font-size:.72rem;font-weight:600;border:1px solid var(--glass-border);border-radius:var(--radius-sm);background:transparent;color:var(--text-dim);cursor:pointer;transition:all var(--transition);font-family:var(--font)}
.template-btn:hover{border-color:var(--border);color:var(--text)}
.template-btn.active{background:rgba(214,48,49,0.15);border-color:var(--primary);color:var(--primary-light)}
.editor-layout{display:grid;grid-template-columns:1fr 1fr;gap:1rem;align-items:start}
.glass-card{background:var(--glass-bg);backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:1rem;margin-bottom:1rem}
.section-title{font-size:.82rem;font-weight:700;color:var(--primary-light);margin-bottom:.5rem}
.editor-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:.5rem}
.editor-header .section-title{margin-bottom:0}
.editor-wrap{display:flex;border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;background:var(--bg-input)}
.line-numbers{padding:.5rem .4rem;font-family:var(--mono);font-size:.75rem;color:var(--text-muted);text-align:right;user-select:none;min-width:35px;line-height:1.5;background:rgba(0,0,0,0.2);border-right:1px solid var(--glass-border)}
.shader-editor{flex:1;padding:.5rem;font-family:var(--mono);font-size:.75rem;background:transparent;color:var(--text);border:none;resize:none;outline:none;line-height:1.5;min-height:300px;tab-size:2}
.error-panel{padding:.5rem;background:rgba(255,107,107,0.08);border:1px solid rgba(255,107,107,0.2);border-radius:var(--radius-sm);margin-top:.5rem;font-family:var(--mono);font-size:.72rem;color:var(--danger);white-space:pre-wrap}
.canvas-wrap{position:relative;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--glass-border)}
.canvas-wrap canvas{display:block;width:100%;height:auto;aspect-ratio:1}
.no-webgpu{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:rgba(0,0,0,0.7);font-size:.82rem;color:var(--warning);text-align:center;gap:.25rem}
.preview-info{display:flex;align-items:center;justify-content:space-between;margin-top:.5rem}
.fps{font-family:var(--mono);font-size:.72rem;color:var(--text-muted)}
.btn{display:inline-flex;align-items:center;gap:.25rem;padding:.4rem .75rem;border:none;border-radius:var(--radius-sm);font-size:.78rem;font-weight:600;font-family:var(--font);cursor:pointer;transition:all var(--transition)}
.btn-primary{background:linear-gradient(135deg,var(--primary),#E17055);color:#fff}
.btn-primary:hover{transform:translateY(-1px)}
.btn-accent{background:rgba(253,203,110,0.15);color:var(--accent);border:1px solid rgba(253,203,110,0.2)}
.btn-accent:hover{background:rgba(253,203,110,0.25)}
.btn-sm{font-size:.72rem;padding:.25rem .45rem}
.footer{padding:1rem 1.5rem;text-align:center;font-size:.78rem;color:var(--text-muted);border-top:1px solid var(--border)}
.toast-container{position:fixed;bottom:1.5rem;right:1.5rem;z-index:200;display:flex;flex-direction:column;gap:.5rem}
.toast{background:var(--bg-card);border:1px solid var(--border);border-left:3px solid var(--accent);backdrop-filter:blur(20px);border-radius:var(--radius-sm);padding:.75rem 1rem;font-size:.82rem;color:var(--text);box-shadow:0 8px 40px rgba(0,0,0,0.4);animation:slideIn 300ms ease;max-width:320px}
::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(214,48,49,0.25);border-radius:3px}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
@media(max-width:768px){.editor-layout{grid-template-columns:1fr}}