*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#0984E3;--primary-light:#74B9FF;--accent:#00CEC9;
  --bg:#0B0E11;--bg-card:rgba(20,24,32,.85);
  --bg-input:rgba(15,18,25,.8);--text:#E8E6F0;--text-dim:#8B8AA0;
  --text-muted:#5A5872;--border:rgba(9,132,227,.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,.6);--glass-border:rgba(255,255,255,.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(9,132,227,.07) 0%,transparent 50%),radial-gradient(ellipse at 80% 80%,rgba(0,206,201,.05) 0%,transparent 50%);pointer-events:none;z-index:0}
.app{position:relative;z-index:1;max-width:720px;margin:0 auto}
.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 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)}
.badge{font-size:.72rem;padding:.2rem .55rem;border-radius:99px;font-weight:600}
.badge.supported{background:rgba(0,184,148,.15);color:var(--success)}
.badge.unsupported{background:rgba(255,107,107,.15);color:var(--danger)}
.main{padding:1.5rem}
.glass-card{background:var(--glass-bg);backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:1.25rem;margin-bottom:1rem}
.section-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.5rem;margin-bottom:.75rem}
.section-title{font-size:.85rem;font-weight:700;color:var(--primary-light);margin-bottom:.75rem}
.section-header .section-title{margin-bottom:0}
.support-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:.35rem}
.support-item{display:flex;align-items:center;gap:.35rem;padding:.35rem .5rem;background:rgba(255,255,255,.02);border:1px solid var(--glass-border);border-radius:var(--radius-sm);font-size:.72rem}
.support-icon{font-size:.85rem}
.support-label{color:var(--text-dim)}
.support-value{margin-left:auto;font-weight:600;font-size:.68rem}
.support-value.yes{color:var(--success)}
.support-value.no{color:var(--danger)}
.editor{width:100%;padding:.5rem;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-family:var(--mono);font-size:.78rem;resize:vertical;line-height:1.5}
.editor:focus{outline:none;border-color:var(--primary)}
.editor-error{margin-top:.35rem;padding:.35rem .5rem;background:rgba(255,107,107,.1);border:1px solid rgba(255,107,107,.2);border-radius:var(--radius-sm);font-size:.72rem;color:var(--danger);font-family:var(--mono)}
.test-row{display:flex;gap:.35rem}
.input{flex:1;padding:.4rem .5rem;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:.78rem;font-family:var(--font)}
.input:focus{outline:none;border-color:var(--primary)}
.test-result{margin-top:.5rem;padding:.5rem;border-radius:var(--radius-sm);font-size:.78rem}
.test-result.match{background:rgba(0,184,148,.1);border:1px solid rgba(0,184,148,.2);color:var(--success)}
.test-result.no-match{background:rgba(255,107,107,.1);border:1px solid rgba(255,107,107,.2);color:var(--danger)}
.rules-preview{display:flex;flex-direction:column;gap:.25rem}
.rule-card{padding:.5rem;background:rgba(255,255,255,.02);border:1px solid var(--glass-border);border-radius:var(--radius-sm)}
.rule-type{font-size:.68rem;font-weight:700;text-transform:uppercase;padding:.1rem .3rem;border-radius:3px;display:inline-block;margin-bottom:.25rem}
.rule-type.prefetch{background:rgba(9,132,227,.15);color:var(--primary-light)}
.rule-type.prerender{background:rgba(0,206,201,.15);color:var(--accent)}
.rule-source{font-size:.68rem;color:var(--text-muted);font-family:var(--mono)}
.rule-urls{font-size:.72rem;color:var(--text-dim);font-family:var(--mono);margin-top:.15rem}
.perf-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.35rem}
.perf-card{padding:.5rem;background:rgba(255,255,255,.02);border:1px solid var(--glass-border);border-radius:var(--radius-sm);text-align:center}
.perf-value{font-size:1.1rem;font-weight:800;color:var(--primary-light)}
.perf-label{font-size:.65rem;color:var(--text-muted);margin-top:.1rem}
.text-muted{font-size:.72rem;color:var(--text-muted)}
.btn-row{display:flex;gap:.25rem}
.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),var(--accent));color:#fff}
.btn-primary:hover{transform:translateY(-1px)}
.btn-accent{background:rgba(0,206,201,.15);color:var(--accent);border:1px solid rgba(0,206,201,.2)}
.btn-accent:hover{background:rgba(0,206,201,.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,.4);animation:slideIn 300ms ease;max-width:320px}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(9,132,227,.25);border-radius:3px}
@media(max-width:640px){.test-row{flex-direction:column}}