*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#00B894;--primary-light:#00CEC9;--accent:#6C5CE7;
  --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(0,184,148,0.15);
  --border-hover:rgba(0,184,148,0.35);--success:#00B894;
  --danger:#FF6B6B;--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;line-height:1.6;-webkit-font-smoothing:antialiased}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse at 20% 15%,rgba(0,184,148,0.07) 0%,transparent 50%),radial-gradient(ellipse at 80% 80%,rgba(108,92,231,0.04) 0%,transparent 50%);pointer-events:none;z-index:0}
.app{position:relative;z-index:1;max-width:800px;margin:0 auto}
.header{padding:1rem 1.5rem;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:.75rem}
.header-brand{display:flex;align-items:center;gap:.75rem}
.header-brand h1{font-size:1.1rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.subtitle{font-size:.78rem;color:var(--text-dim)}
.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:1.25rem}
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:.75rem;flex-wrap:wrap;gap:.5rem}
.section-title{font-size:.9rem;font-weight:700;color:var(--primary-light);margin-bottom:.75rem}
.section-header .section-title{margin-bottom:0}
.test-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}
.test-header .section-title{margin-bottom:0}
.badge{font-size:.72rem;padding:.2rem .55rem;border-radius:99px;background:rgba(0,206,201,0.15);color:var(--primary-light);font-weight:600}
.speed-display{display:flex;justify-content:center;margin-bottom:1.25rem}
.speed-ring{width:140px;height:140px;border-radius:50%;border:4px solid var(--border);display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative;transition:border-color .5s ease}
.speed-ring.active{border-color:var(--primary);box-shadow:0 0 30px rgba(0,184,148,0.2)}
.speed-value{font-size:2rem;font-weight:700;font-family:var(--mono);color:var(--text)}
.speed-unit{font-size:.75rem;color:var(--text-muted)}
.test-inputs{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem;margin-bottom:1rem}
.input-group{display:flex;flex-direction:column;gap:.25rem}
.input-group label{font-size:.75rem;color:var(--text-dim);font-weight:500}
.input{padding:.5rem .65rem;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:.85rem;font-family:var(--mono);transition:border var(--transition)}
.input:focus{outline:none;border-color:var(--primary)}
.full-width{width:100%}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.75rem}
.stat-card{padding:.65rem;background:rgba(255,255,255,0.02);border:1px solid var(--glass-border);border-radius:var(--radius-sm)}
.stat-label{font-size:.72rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.2rem}
.stat-value{font-size:1.1rem;font-weight:700;font-family:var(--mono);color:var(--text)}
.stat-value.good{color:var(--success)}
.stat-value.bad{color:var(--danger)}
.select-sm{padding:.3rem .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)}
canvas{width:100%;height:auto;display:block}
.table-wrap{overflow-x:auto}
.table{width:100%;border-collapse:collapse;font-size:.8rem}
.table th{text-align:left;font-size:.72rem;text-transform:uppercase;color:var(--text-muted);padding:.5rem;border-bottom:1px solid var(--border);letter-spacing:.04em}
.table td{padding:.5rem;border-bottom:1px solid var(--glass-border);font-family:var(--mono);vertical-align:middle}
.table tr:hover td{background:rgba(255,255,255,0.02)}
.del-btn{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:.85rem;padding:.2rem .4rem;border-radius:4px;transition:all 150ms}
.del-btn:hover{color:var(--danger);background:rgba(255,107,107,0.1)}
.history-actions{display:flex;gap:.4rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.35rem;padding:.5rem 1rem;border:none;border-radius:var(--radius-sm);font-size:.82rem;font-weight:600;font-family:var(--font);cursor:pointer;transition:all var(--transition)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;box-shadow:0 2px 12px rgba(0,184,148,0.3)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(0,184,148,0.4)}
.btn-accent{background:rgba(108,92,231,0.15);color:var(--accent);border:1px solid rgba(108,92,231,0.2)}
.btn-accent:hover{background:rgba(108,92,231,0.25)}
.btn-ghost{background:transparent;color:var(--text-dim)}
.btn-ghost:hover{color:var(--text);background:rgba(255,255,255,0.05)}
.btn-sm{font-size:.75rem;padding:.3rem .5rem}
.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(--primary-light);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:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(0,184,148,0.3);border-radius:3px}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
@media(max-width:640px){.test-inputs{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}}