*{box-sizing:border-box}
:root{
  --bg:#050b15;--panel:rgba(13,24,42,.72);--panel2:rgba(10,20,36,.86);
  --line:rgba(255,255,255,.095);--text:#f7fbff;--muted:#91a0b7;
  --cyan:#31e6ff;--blue:#4b7dff;--purple:#af5cff;--green:#4ef0a7;--danger:#ff647c;
}
html{scroll-behavior:smooth}
body{
  margin:0;min-height:100vh;background:
  radial-gradient(circle at 10% 0%,rgba(52,112,255,.14),transparent 34%),
  radial-gradient(circle at 90% 20%,rgba(170,60,255,.12),transparent 32%),
  linear-gradient(145deg,#030812,#07111f 58%,#040812);
  color:var(--text);font-family:Inter,system-ui,sans-serif;overflow-x:hidden
}
body:before{
  content:"";position:fixed;inset:0;pointer-events:none;opacity:.16;
  background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:42px 42px
}
.ambient{position:fixed;border-radius:50%;filter:blur(90px);pointer-events:none;opacity:.17}
.ambient-a{width:380px;height:380px;background:#2567ff;left:-160px;top:22%}
.ambient-b{width:330px;height:330px;background:#8e42ff;right:-130px;bottom:10%}
.app-shell{width:min(1180px,calc(100% - 32px));margin:auto;padding:28px 0 36px;position:relative}
.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.brand{display:flex;align-items:center;gap:13px;color:inherit;text-decoration:none}
.brand-mark{width:48px;height:48px;display:grid;place-items:center;border:1px solid var(--line);border-radius:15px;background:linear-gradient(145deg,rgba(49,230,255,.15),rgba(75,125,255,.1));box-shadow:0 12px 30px rgba(0,0,0,.22)}
.brand-mark svg{width:31px;color:var(--cyan)}
.brand strong{display:block;font-size:20px;letter-spacing:-.6px}
.brand small{display:block;color:var(--muted);font-size:11px;margin-top:2px}
.server-pill{display:flex;gap:9px;align-items:center;padding:10px 14px;border:1px solid var(--line);border-radius:999px;background:rgba(8,16,29,.62);font-size:12px;color:var(--muted)}
.server-pill strong{color:#dce8f8;font-weight:600}
.live-dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 5px rgba(78,240,167,.1),0 0 13px var(--green)}
.glass{border:1px solid var(--line);background:linear-gradient(145deg,rgba(17,31,54,.82),rgba(8,17,31,.72));box-shadow:0 22px 60px rgba(0,0,0,.28);backdrop-filter:blur(18px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(340px,.75fr);gap:20px}
.speed-card{border-radius:28px;padding:28px;min-height:570px;position:relative;overflow:hidden}
.speed-card:after{content:"";position:absolute;width:230px;height:230px;border-radius:50%;background:rgba(75,125,255,.08);filter:blur(25px);left:50%;top:40%;transform:translate(-50%,-50%)}
.card-head,.connection-head,.history-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;position:relative;z-index:2}
.eyebrow{margin:0 0 8px;color:#5f7899;font-size:10px;font-weight:800;letter-spacing:1.8px}
h1,h2,p{margin-top:0}h1{font-size:25px;margin-bottom:0;letter-spacing:-.8px}h2{font-size:20px;margin-bottom:0;letter-spacing:-.5px}
.phase-badge{font-size:10px;font-weight:800;letter-spacing:1px;color:#8fa3c1;padding:8px 11px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.025)}
.gauge-wrap{height:350px;position:relative;display:grid;place-items:center;z-index:2}
.gauge{width:min(100%,520px);overflow:visible}
.gauge-track,.gauge-progress{fill:none;stroke-width:16;stroke-linecap:round}
.gauge-track{stroke:rgba(255,255,255,.065)}
.gauge-progress{stroke:url(#gaugeGradient);stroke-dasharray:100;stroke-dashoffset:100;filter:url(#glow);transition:stroke-dashoffset .22s ease}
.ticks text{fill:#5f7089;font-size:10px;font-weight:700}
.speed-readout{position:absolute;left:50%;top:57%;transform:translate(-50%,-50%);text-align:center}
.speed-readout span{display:block;font-size:66px;line-height:1;font-weight:800;letter-spacing:-5px;text-shadow:0 0 28px rgba(49,230,255,.18)}
.speed-readout small{display:block;margin-top:10px;color:var(--muted);font-weight:700;letter-spacing:2px}
.start-btn{position:relative;z-index:3;margin:-4px auto 0;display:flex;align-items:center;justify-content:center;gap:11px;min-width:235px;border:0;border-radius:16px;padding:17px 24px;color:white;font:800 13px Inter;letter-spacing:.8px;cursor:pointer;background:linear-gradient(100deg,var(--blue),#7567ff 55%,var(--purple));box-shadow:0 15px 40px rgba(75,125,255,.28);transition:.25s}
.start-btn:hover{transform:translateY(-2px);box-shadow:0 19px 50px rgba(75,125,255,.38)}
.start-btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.btn-icon{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.14);font-size:9px}
.hint{text-align:center;color:#5f7089;font-size:11px;margin:14px 0 0;position:relative;z-index:2}
.side-column{display:flex;flex-direction:column;gap:20px}
.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.metric-card{border-radius:20px;padding:19px;display:flex;align-items:center;gap:13px;min-height:103px}
.metric-icon{width:42px;height:42px;flex:0 0 42px;border-radius:13px;display:grid;place-items:center;font-size:23px;font-weight:700}
.metric-icon.download{background:rgba(49,230,255,.1);color:var(--cyan)}
.metric-icon.upload{background:rgba(175,92,255,.1);color:#ca8cff}
.metric-icon.ping{background:rgba(78,240,167,.1);color:var(--green)}
.metric-icon.jitter{background:rgba(255,183,77,.1);color:#ffbd59}
.metric-card span{display:block;color:var(--muted);font-size:11px;margin-bottom:7px}
.metric-card strong{font-size:13px;color:#8ea1bc;font-weight:600}
.metric-card b{font-size:23px;color:white;letter-spacing:-1px;margin-right:3px}
.connection-card{border-radius:24px;padding:24px;flex:1}
.quality-score{width:58px;height:58px;border-radius:17px;display:grid;place-items:center;font-size:20px;font-weight:800;background:rgba(49,230,255,.08);border:1px solid rgba(49,230,255,.18);color:var(--cyan)}
.quality-bar{height:8px;background:rgba(255,255,255,.06);border-radius:99px;overflow:hidden;margin:24px 0}
.quality-bar span{display:block;height:100%;width:0;border-radius:inherit;background:linear-gradient(90deg,var(--cyan),var(--blue),var(--purple));box-shadow:0 0 18px rgba(75,125,255,.5);transition:width .7s ease}
.connection-info{display:grid;gap:0}
.connection-info div{display:flex;justify-content:space-between;gap:18px;padding:16px 0;border-bottom:1px solid rgba(255,255,255,.055)}
.connection-info div:last-child{border-bottom:0}
.connection-info span{color:var(--muted);font-size:12px}
.connection-info strong{font-size:12px;text-align:right;max-width:210px;overflow:hidden;text-overflow:ellipsis}
.history-card{border-radius:25px;padding:25px;margin-top:20px}
.ghost-btn{border:1px solid var(--line);background:rgba(255,255,255,.025);color:#b9c7dc;border-radius:12px;padding:10px 13px;font:600 11px Inter;cursor:pointer}
.ghost-btn:hover{border-color:rgba(255,255,255,.2);color:white}
.table-wrap{overflow:auto;margin-top:20px}
table{width:100%;border-collapse:collapse;min-width:760px}
th,td{text-align:left;padding:15px 13px;border-bottom:1px solid rgba(255,255,255,.055);font-size:12px}
th{color:#70829d;font-size:10px;text-transform:uppercase;letter-spacing:.9px}
td{color:#d8e2f0}.empty{text-align:center;color:var(--muted);padding:30px}
.tag{display:inline-flex;padding:6px 9px;border-radius:999px;font-size:10px;font-weight:700;background:rgba(78,240,167,.09);color:var(--green)}
footer{display:flex;justify-content:space-between;gap:20px;color:#52637c;font-size:10px;padding:20px 4px 0}
.toast{position:fixed;right:24px;bottom:24px;background:#111d30;border:1px solid var(--line);border-radius:13px;padding:13px 16px;color:#eaf2ff;font-size:12px;transform:translateY(30px);opacity:0;pointer-events:none;transition:.3s;box-shadow:0 15px 40px rgba(0,0,0,.35)}
.toast.show{opacity:1;transform:translateY(0)}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr}.speed-card{min-height:auto}.gauge-wrap{height:320px}}
@media(max-width:600px){
  .app-shell{width:min(100% - 20px,1180px);padding-top:18px}.topbar{align-items:flex-start}.server-pill span:not(.live-dot){display:none}
  .speed-card,.connection-card,.history-card{padding:19px;border-radius:21px}.metric-grid{grid-template-columns:1fr 1fr;gap:10px}
  .metric-card{padding:14px;min-height:90px}.metric-icon{width:36px;height:36px;flex-basis:36px}.metric-card b{font-size:19px}
  h1{font-size:21px}.speed-readout span{font-size:52px}.gauge-wrap{height:275px}.start-btn{width:100%;margin-top:0}
  footer{flex-direction:column}.brand small{display:none}
}

.measurement-note{
  display:flex;gap:11px;align-items:flex-start;margin-top:18px;padding:14px;
  border:1px solid rgba(49,230,255,.1);border-radius:15px;
  background:rgba(49,230,255,.045)
}
.note-icon{
  width:23px;height:23px;flex:0 0 23px;border-radius:50%;display:grid;place-items:center;
  background:rgba(49,230,255,.12);color:var(--cyan);font-size:12px;font-weight:800
}
.measurement-note p{margin:0;color:#7f91aa;font-size:10px;line-height:1.55}
.measurement-note strong{color:#b9c9df}