.speed-container{background:hsla(0,0%,100%,.95);border-radius:20px;padding:40px;box-shadow:0 20px 40px rgba(0,0,0,.1);max-width:600px;width:90%;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.speed-display{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-bottom:30px}.speed-item{text-align:center;padding:25px;background:linear-gradient(145deg,#f7fafc,#edf2f7);border-radius:15px;box-shadow:0 4px 15px rgba(0,0,0,.1);transition:transform .3s ease,box-shadow .3s ease}.speed-item:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.15)}.speed-label{font-size:1.1em;color:#718096;margin-bottom:10px;font-weight:500}.speed-value{font-size:3em;font-weight:700;color:#2d3748;margin:10px 0;text-shadow:0 2px 4px rgba(0,0,0,.1)}.speed-unit{font-size:.9em;color:#a0aec0;font-weight:400}.speed-controls{display:flex;gap:15px;justify-content:center;margin-bottom:30px}.btn-primary,.btn-secondary{padding:12px 30px;border:none;border-radius:50px;font-size:1.1em;font-weight:600;cursor:pointer;transition:all .3s ease;text-transform:uppercase;letter-spacing:1px}.btn-primary{background:linear-gradient(135deg,#4299e1,#3182ce);color:#fff;box-shadow:0 4px 15px rgba(66,153,225,.4)}.btn-primary:hover:not(:disabled){background:linear-gradient(135deg,#3182ce,#2c5282);transform:translateY(-2px);box-shadow:0 6px 20px rgba(66,153,225,.6)}.btn-secondary{background:linear-gradient(135deg,#fc8181,#e53e3e);color:#fff;box-shadow:0 4px 15px rgba(252,129,129,.4)}.btn-secondary:hover:not(:disabled){background:linear-gradient(135deg,#e53e3e,#c53030);transform:translateY(-2px);box-shadow:0 6px 20px rgba(252,129,129,.6)}.btn-primary:disabled,.btn-secondary:disabled{opacity:.6;cursor:not-allowed;transform:none;box-shadow:none}.speed-status{text-align:center;margin-bottom:30px}#statusText{font-size:1.1em;color:#4a5568;margin-bottom:15px;font-weight:500}.speed-progress-bar{width:100%;height:8px;background:#e2e8f0;border-radius:10px;overflow:hidden;box-shadow:inset 0 2px 4px rgba(0,0,0,.1)}.progress{height:100%;background:linear-gradient(90deg,#4299e1,#3182ce);border-radius:10px;transition:width .5s ease;box-shadow:0 2px 8px rgba(66,153,225,.5)}.info{background:linear-gradient(145deg,#f7fafc,#edf2f7);padding:25px;border-radius:15px;border-left:5px solid #4299e1;box-shadow:0 4px 15px rgba(0,0,0,.05)}.info h3{color:#2d3748;margin-bottom:15px;font-size:1.3em;font-weight:600}.info ul{list-style:none;padding-left:0}.info li{color:#4a5568;margin-bottom:10px;padding-left:25px;position:relative;line-height:1.6}.info li:before{content:"✓";position:absolute;left:0;color:#48bb78;font-weight:700;font-size:1.2em}@media (max-width:768px){.speed-container{padding:25px;margin:20px}h1{font-size:2em;margin-bottom:20px}.speed-display{grid-template-columns:1fr;gap:20px}.speed-value{font-size:2.5em}.speed-controls{flex-direction:column;gap:10px}.btn-primary,.btn-secondary{width:100%}}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}.speed-item.testing{animation:pulse 2s infinite}@media (prefers-color-scheme:dark){body{background:linear-gradient(135deg,#2d3748,#1a202c)}.speed-container{background:rgba(45,55,72,.95);color:#e2e8f0}.speed-item,h1{color:#e2e8f0}.speed-item{background:linear-gradient(145deg,#2d3748,#1a202c)}.speed-value{color:#e2e8f0}.info{background:linear-gradient(145deg,#2d3748,#1a202c);border-left-color:#4299e1}.info h3{color:#e2e8f0}#statusText,.info li{color:#cbd5e0}}