.quality-section{padding:clamp(72px,9vw,128px) 0;background:var(--paper-2,#f3f0e9);border-block:1px solid var(--line,#d7d8d5)}
.quality-head{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,7vw,100px);align-items:end;margin-bottom:54px}.quality-head>div>span,.quality-details>div>span,.quality-guide>span,.browser-probe>div:first-child>span,.quality-lab-head>div>span{display:block;margin-bottom:14px;color:#58727a;font:700 12px/1.2 system-ui;letter-spacing:.2em}.quality-head h2{margin:0;color:var(--ink,#0a1a2b);font:700 clamp(38px,5vw,72px)/.98 var(--display,system-ui);letter-spacing:-.04em}.quality-head h2 em{color:#5bcbd0;font-style:normal}.quality-head p{margin:0;color:var(--muted,#65717d);font-size:clamp(17px,2vw,21px);line-height:1.7}
.quality-concepts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:28px}.quality-concepts article{min-width:0;padding:30px;background:color-mix(in srgb,var(--paper,#fff) 92%,#d9f6f5);border:1px solid var(--line,#d8ddd9);border-radius:22px 44px 24px 34px;box-shadow:0 18px 45px rgba(6,24,39,.05)}.quality-concepts article:nth-child(2n){border-radius:38px 20px 42px 24px}.quality-concepts article:nth-child(3n){border-radius:24px 38px 20px 46px}.quality-concepts article>span{color:#54afb7;font:700 12px/1 monospace;letter-spacing:.16em}.quality-concepts h3{margin:18px 0 12px;color:var(--ink,#0a1a2b);font-size:22px}.quality-concepts p{margin:0 0 20px;color:var(--muted,#65717d);line-height:1.65}.quality-concepts code{display:inline-block;max-width:100%;padding:8px 11px;border-radius:9px;background:rgba(79,197,204,.1);color:#347a82;font:600 12px/1.2 monospace;white-space:normal}
.quality-lab{overflow:hidden;margin-top:28px;background:linear-gradient(145deg,#071828,#06121f 68%,#0b2031);color:#edf8f7;border:1px solid #28475d;border-radius:32px 48px 34px 54px;box-shadow:0 30px 90px rgba(2,17,30,.2)}.quality-lab-head{display:grid;grid-template-columns:1fr 1.15fr;gap:32px;padding:38px 42px;border-bottom:1px solid #244155}.quality-lab-head h3{max-width:600px;margin:0;font-size:clamp(24px,3vw,38px);line-height:1.15}.quality-lab-head>div>span{color:#65d3d5}.quality-presets{display:flex;flex-wrap:wrap;gap:9px;align-content:start;justify-content:flex-end}.quality-presets button{padding:11px 15px;color:#b6c9d3;background:#0d2334;border:1px solid #315065;border-radius:999px;font:700 13px system-ui;cursor:pointer}.quality-presets button.active{color:#06202b;background:#71d9db;border-color:#71d9db}.quality-presets button:focus-visible,.browser-probe button:focus-visible{outline:3px solid #ff746c;outline-offset:3px}
.quality-lab-grid{display:grid;grid-template-columns:minmax(260px,.75fr) minmax(0,1.25fr)}.quality-controls{padding:38px 42px;background:rgba(4,16,27,.42);border-right:1px solid #244155}.quality-controls label{display:block;padding:0 0 25px;margin-bottom:25px;border-bottom:1px solid #1f394d}.quality-controls label:last-child{margin-bottom:0}.quality-controls label>span{display:flex;justify-content:space-between;gap:12px}.quality-controls b{font-size:15px}.quality-controls output{color:#74dcdd;font:700 14px monospace}.quality-controls small{display:block;margin:6px 0 14px;color:#829baa;line-height:1.4}.quality-controls input{width:100%;accent-color:#65d3d5;cursor:pointer}.quality-visual{min-width:0;padding:38px 42px}
.packet-road{display:grid;grid-template-columns:70px minmax(0,1fr) 70px;align-items:center;gap:12px}.packet-endpoint{display:grid;place-items:center;aspect-ratio:1;border:1px solid #365970;border-radius:20px;background:#0d2638;text-align:center}.packet-endpoint b{font-size:12px}.packet-endpoint small{color:#7893a2;font-size:10px}.packet-lane{position:relative;height:58px;overflow:hidden;border-block:1px dashed #31546a;background:linear-gradient(90deg,transparent,#102b3c 50%,transparent)}.packet-lane i{position:absolute;top:22px;left:-16px;width:16px;height:11px;border-radius:3px;background:#6dd9dc;box-shadow:0 0 15px rgba(109,217,220,.75);animation:quality-packet var(--packet-speed) linear var(--packet-delay) infinite}.packet-lane i.lost{background:#ff6c67;animation-name:quality-lost}.quality-chart{margin-top:36px}.chart-scale{display:flex;justify-content:space-between;margin-bottom:9px;color:#7893a2;font-size:10px;text-transform:uppercase;letter-spacing:.14em}.chart-bars{display:flex;align-items:flex-end;gap:4px;height:160px;padding:12px;border:1px solid #213f53;border-radius:18px;background:#05111d}.chart-bars i{flex:1;min-width:2px;border-radius:5px 5px 2px 2px;background:linear-gradient(#83e1df,#338f9b);transition:height .25s ease}.chart-bars i.lost{background:#ff6c67;opacity:.8}
.quality-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:20px;overflow:hidden;border:1px solid #27465a;border-radius:16px;background:#27465a}.quality-metrics div{padding:18px;background:#0a1c2b}.quality-metrics span{display:block;margin-bottom:7px;color:#8199a7;font-size:11px}.quality-metrics b{font:700 clamp(17px,2vw,24px) monospace;color:#eaf9f7}.quality-verdict{margin:20px 0 0;padding:16px 18px;border-left:3px solid #6dd9dc;background:rgba(109,217,220,.07);color:#c5d8df;line-height:1.5}.usecase-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #244155}.usecase-grid>div{position:relative;padding:25px 22px;border-right:1px solid #244155}.usecase-grid>div:last-child{border:0}.usecase-grid span,.usecase-grid b,.usecase-grid small{display:block}.usecase-grid span{color:#839ba9;font-size:11px;text-transform:uppercase;letter-spacing:.12em}.usecase-grid b{margin:10px 0 12px;font-size:18px}.usecase-grid small{color:#8296a2;line-height:1.5}.usecase-grid i{position:absolute;top:28px;right:22px;width:9px;height:9px;border-radius:50%;background:#6edcaf;box-shadow:0 0 12px currentColor}.usecase-grid .okay i{background:#ffc468}.usecase-grid .bad i{background:#ff6e69}.usecase-grid .okay b{color:#ffd082}.usecase-grid .bad b{color:#ff8c86}
.browser-probe{display:grid;grid-template-columns:1.15fr .85fr;gap:34px;margin:28px 0;padding:36px 40px;background:var(--paper,#fff);border:1px solid var(--line,#d8ddd9);border-radius:42px 22px 46px 28px}.browser-probe h3{margin:0 0 14px;color:var(--ink,#0a1a2b);font-size:clamp(24px,3vw,36px)}.browser-probe p{color:var(--muted,#65717d);line-height:1.65}.browser-probe button{margin-top:10px;padding:15px 19px;border:0;border-radius:12px;background:#0b2032;color:#fff;font-weight:750;cursor:pointer}.browser-probe button:disabled{opacity:.48;cursor:wait}.probe-result{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;align-self:stretch;overflow:hidden;background:var(--line,#d8ddd9);border:1px solid var(--line,#d8ddd9);border-radius:18px}.probe-result>div{padding:22px 14px;background:var(--paper-2,#f3f0e9);text-align:center}.probe-result span{display:block;color:var(--muted,#65717d);font-size:11px;text-transform:uppercase;letter-spacing:.1em}.probe-result b{display:block;margin-top:9px;color:var(--ink,#0a1a2b);font:700 clamp(17px,2vw,24px) monospace}.probe-result p{grid-column:1/-1;margin:0;padding:17px 20px;background:var(--paper-2,#f3f0e9);font-size:13px}
.quality-details{display:grid;grid-template-columns:.7fr 1.3fr;gap:50px;padding:48px 42px;background:var(--paper,#fff);border:1px solid var(--line,#d8ddd9);border-radius:24px 44px 28px 50px}.quality-details h3{margin:0;color:var(--ink,#0a1a2b);font-size:clamp(25px,3vw,38px)}.quality-details ul{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;margin:0;padding:0;list-style:none}.quality-details li{padding-top:18px;border-top:2px solid #77d4d4}.quality-details li b{color:var(--ink,#0a1a2b)}.quality-details li p{margin:8px 0 0;color:var(--muted,#65717d);line-height:1.55}.quality-guide{display:grid;grid-template-columns:1.2fr repeat(4,1fr);gap:22px;align-items:start;margin-top:28px;padding:28px 32px;border:1px solid var(--line,#d8ddd9);border-radius:28px;background:color-mix(in srgb,var(--paper,#fff) 90%,#cff4f2)}.quality-guide>span{margin:4px 0}.quality-guide b,.quality-guide small{display:block}.quality-guide b{color:var(--ink,#0a1a2b)}.quality-guide small{margin-top:6px;color:var(--muted,#65717d);line-height:1.4}.quality-guide p{grid-column:2/-1;margin:0;color:var(--muted,#65717d);font-size:13px;line-height:1.55}
@keyframes quality-packet{to{transform:translateX(900px)}}@keyframes quality-lost{0%{transform:translateX(0);opacity:1}55%{transform:translateX(330px);opacity:1}70%,100%{transform:translateX(350px) scale(.1);opacity:0}}
@media(max-width:900px){.quality-head,.quality-lab-head,.browser-probe,.quality-details{grid-template-columns:1fr}.quality-concepts{grid-template-columns:repeat(2,minmax(0,1fr))}.quality-lab-grid{grid-template-columns:1fr}.quality-controls{border-right:0;border-bottom:1px solid #244155}.quality-presets{justify-content:flex-start}.usecase-grid{grid-template-columns:repeat(2,1fr)}.usecase-grid>div:nth-child(2){border-right:0}.quality-guide{grid-template-columns:repeat(2,1fr)}.quality-guide>span,.quality-guide p{grid-column:1/-1}}
@media(max-width:600px){.quality-section{padding:66px 0}.quality-concepts{grid-template-columns:1fr}.quality-concepts article{padding:25px}.quality-lab{border-radius:24px}.quality-lab-head,.quality-controls,.quality-visual{padding:28px 22px}.quality-presets{flex-wrap:nowrap;overflow-x:auto;padding-bottom:5px}.quality-presets button{flex:0 0 auto}.packet-road{grid-template-columns:54px minmax(0,1fr) 54px;gap:7px}.packet-endpoint{border-radius:14px}.chart-bars{height:130px;gap:3px}.quality-metrics,.probe-result{grid-template-columns:1fr}.quality-metrics div{padding:13px 16px}.usecase-grid{grid-template-columns:1fr}.usecase-grid>div{border-right:0;border-bottom:1px solid #244155}.browser-probe,.quality-details{padding:28px 22px}.probe-result p{grid-column:1}.quality-details ul{grid-template-columns:1fr}.quality-guide{grid-template-columns:1fr;padding:25px 22px}.quality-guide>span{grid-column:1}.quality-head h2 br{display:none}}
@media(prefers-reduced-motion:reduce){.packet-lane i{animation:none}.chart-bars i{transition:none}}