:root{color-scheme:light dark}body{font-family:system-ui,-apple-system,Segoe UI,sans-serif;max-width:960px;margin:0 auto;padding:0 1rem 3rem;line-height:1.6}header p{color:#666}.state{font-weight:600;padding:.5rem 0}.state-ready{color:#1a7f37}.state-connecting,.state-reconnecting{color:#9a6700}.state-closed{color:#cf222e}.stats{font-size:.85rem;font-family:ui-monospace,Menlo,monospace;color:#555;padding-bottom:1rem;border-bottom:1px solid #ddd;margin-bottom:1rem}.cols{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}@media(max-width:640px){.cols{grid-template-columns:1fr}}.col{border:1px solid #ddd;border-radius:8px;padding:1rem}.col h2{margin-top:0;font-size:1.1rem}.rate-buttons,.dl-test{display:flex;gap:.5rem;align-items:center;margin-top:.75rem;flex-wrap:wrap}button{cursor:pointer;padding:.4rem .8rem;border-radius:6px;border:1px solid #ccc;background:#f6f8fa}button:hover{background:#eaeef2}.dl-status{font-size:.85rem;font-family:ui-monospace,Menlo,monospace}footer{margin-top:2rem;font-size:.85rem;color:#666}footer code{background:#f6f8fa;padding:.1rem .3rem;border-radius:4px}