@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  --ink: #13282f;
  --muted: #61747b;
  --canvas: #f7faf9;
  --panel: #fff;
  --soft: #eef5f3;
  --line: #d6e3df;
  --aqua: #087f78;
  --aqua-dark: #075f5c;
  --aqua-light: #dff4f0;
  --night: #0b1b22;
  --night-soft: #10262c;
  --lime: #a7d96f;
  --display: "Space Grotesk", "Segoe UI", sans-serif;
  --body: "DM Sans", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { overflow-x: hidden; scroll-behavior: smooth; }
body { min-width: 0; margin: 0; overflow-x: hidden; color: var(--ink); background: var(--canvas); font: 400 16px/1.6 var(--body); }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
h1, h2, h3, p { text-wrap: pretty; }
code, pre { font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace; }
.skip-link { position: fixed; z-index: 100; top: -4rem; left: 1rem; padding: .7rem 1rem; color: #fff; background: var(--aqua); }
.skip-link:focus { top: 1rem; }

.site-header { position: sticky; z-index: 30; top: 0; min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: .7rem clamp(1.25rem,4vw,5rem); background: rgba(255,255,255,.92); border-bottom: 1px solid rgba(196,215,210,.9); box-shadow: 0 8px 30px rgba(24,59,61,.06); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: .75rem; font: 700 .78rem var(--display); letter-spacing: .13em; white-space: nowrap; }
.brand-slash { color: var(--aqua); }
.brand-mark { display: grid; grid-template-columns: repeat(2,.5rem); grid-template-rows: repeat(2,.5rem); gap: .1rem; padding: .22rem; border: 1px solid #9ccac5; background: var(--aqua-light); }
.brand-mark i { background: var(--aqua); }
.brand-mark i:nth-child(2), .brand-mark i:nth-child(3) { opacity: .45; }
nav { display: flex; align-items: center; gap: clamp(1rem,2.2vw,2rem); color: #4e656c; font: 600 .76rem var(--display); }
nav a { transition: color .2s ease; }
nav a:hover, nav a:focus-visible { color: var(--aqua-dark); }
.nav-cta { padding: .58rem .95rem; color: #fff; background: var(--aqua); border: 1px solid var(--aqua); }
nav .nav-cta:hover, nav .nav-cta:focus-visible { color: #fff; background: var(--aqua-dark); }

.hero { position: relative; isolation: isolate; min-height: calc(100vh - 72px); display: grid; grid-template-columns: minmax(350px,.88fr) minmax(520px,1.12fr); gap: clamp(3rem,7vw,8rem); align-items: center; overflow: hidden; padding: clamp(5rem,9vw,9rem) clamp(1.25rem,6vw,7rem); color: #eef8f6; background: radial-gradient(circle at 80% 30%,rgba(34,181,167,.19),transparent 28%),linear-gradient(145deg,#10262c 0%,#08171e 78%); }
.grid-field { position: absolute; z-index: -1; inset: 0; opacity: .42; background-image: linear-gradient(rgba(89,199,187,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(89,199,187,.08) 1px,transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(90deg,#000,transparent 78%); }
.eyebrow { margin: 0 0 1.25rem; color: var(--aqua); font: 700 .7rem var(--display); letter-spacing: .14em; text-transform: uppercase; }
.hero .eyebrow, .dark-section .eyebrow { color: #65d2c6; }
.eyebrow > span { display: inline-block; width: 34px; height: 1px; margin: 0 .75rem .2rem 0; background: currentColor; }
h1 { margin: 0; font: 700 clamp(3.5rem,6vw,7.2rem)/.92 var(--display); letter-spacing: -.06em; }
h1 em { color: transparent; font-style: normal; -webkit-text-stroke: 1.35px #8ea5a8; }
.lede { max-width: 680px; margin: 2rem 0 0; color: #adc1c2; font-size: clamp(1.05rem,1.45vw,1.28rem); }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2.2rem; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 1.4rem; padding: .78rem 1.2rem; border: 1px solid #b6cac5; font: 600 .78rem var(--display); transition: transform .2s ease,background .2s ease,border-color .2s ease; }
.button:hover, .button:focus-visible { transform: translateY(-2px); border-color: var(--aqua); }
.button.primary { color: #fff; background: var(--aqua); border-color: var(--aqua); box-shadow: 0 10px 24px rgba(8,127,120,.18); }
.button.primary:hover, .button.primary:focus-visible { background: var(--aqua-dark); }
.button.secondary { color: #244047; background: rgba(255,255,255,.9); }
.hero .button.secondary { color: #dce9e8; background: transparent; border-color: #4b676c; }
.development-note { display: flex; align-items: center; gap: .55rem; margin: 1.4rem 0 0; color: #80989b; font-size: .72rem; }
.development-note span { width: .48rem; height: .48rem; background: #dfb36e; border-radius: 50%; box-shadow: 0 0 0 5px rgba(223,179,110,.1); }
.development-note strong { color: #b7c8c8; font-weight: 600; }
.hero-copy, .architecture-copy { min-width: 0; }

.transport-panel { position: relative; width: min(780px,100%); display: grid; grid-template-columns: 175px minmax(250px,1fr) 175px; gap: 1.25rem; align-items: center; padding: 5.2rem 2rem 4rem; color: #d9e9e8; background: rgba(7,17,23,.92); border: 1px solid #34505c; box-shadow: 0 36px 90px rgba(0,0,0,.35); }
.panel-bar, .window-bar { position: absolute; inset: 0 0 auto; height: 34px; display: flex; align-items: center; gap: 7px; padding: 0 12px; color: #8398a3; background: #0e1923; font-size: .66rem; }
.panel-bar span, .window-bar > span { width: 7px; height: 7px; border-radius: 50%; background: #3c5968; }
.panel-bar b, .window-bar b { margin-left: .4rem; font-weight: 500; }
.endpoint { padding: 1.25rem 1rem; border: 1px solid #3a5a64; background: #102831; text-align: center; }
.endpoint small { display: block; margin-bottom: .4rem; color: #77a7a6; font: 700 .54rem var(--display); letter-spacing: .12em; }
.endpoint strong { font: 600 .86rem var(--display); }
.packet-lanes { display: grid; gap: .65rem; }
.lane { position: relative; height: 38px; display: flex; align-items: center; justify-content: center; overflow: hidden; color: #8fb3b2; border-block: 1px solid #28444d; font: 700 .5rem var(--display); letter-spacing: .12em; }
.lane::before { position: absolute; inset: 50% 0 auto; height: 1px; background: #2c5158; content: ""; }
.lane span { z-index: 1; padding: 0 .55rem; background: #09151c; }
.lane i { position: absolute; z-index: 2; left: 0; width: 9px; height: 9px; background: #62d0c3; box-shadow: 0 0 12px #62d0c3; animation: packet 3.2s linear infinite; }
.lane.stream i { width: 26px; animation-duration: 4.4s; }
.lane.latest i { background: #dfb36e; box-shadow: 0 0 12px #dfb36e; animation-duration: 2.7s; }
.lane.bulk i { width: 52px; background: #9ebf78; box-shadow: 0 0 12px #9ebf78; animation-duration: 5.2s; }
.transport-footer { position: absolute; inset: auto 1.4rem .85rem; display: flex; justify-content: space-between; color: #507078; font: 700 .5rem var(--display); letter-spacing: .12em; }
@keyframes packet { from { transform: translateX(-35px); } to { transform: translateX(310px); } }

.proof-strip { display: grid; grid-template-columns: repeat(4,1fr); border-block: 1px solid var(--line); background: #fff; }
.proof-strip p { min-height: 94px; display: flex; flex-direction: column; justify-content: center; margin: 0; padding: 1rem clamp(1.25rem,4vw,4rem); border-right: 1px solid var(--line); }
.proof-strip p:last-child { border-right: 0; }
.proof-strip strong { font: 600 1rem var(--display); }
.proof-strip span { color: #6d8085; font-size: .75rem; }

.section-shell { padding: clamp(5rem,9vw,9rem) clamp(1.25rem,7vw,8.5rem); }
.section-intro { display: grid; grid-template-columns: 1.25fr .75fr; gap: clamp(3rem,8vw,10rem); align-items: end; margin-bottom: 4rem; }
.section-intro h2, .dark-section h2, .status h2 { margin: 0; font: 700 clamp(2.5rem,5vw,5.4rem)/.98 var(--display); letter-spacing: -.05em; }
.section-intro > p { margin: 0 0 .4rem; color: var(--muted); }
.mode-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.mode-card { position: relative; min-height: 305px; padding: 2rem; background: var(--panel); }
.mode-card.featured { background: var(--aqua-light); }
.mode-number { display: block; min-height: 62px; color: var(--aqua); font: 700 1.6rem var(--display); }
.mode-wire { margin: 0 0 .6rem; color: #89999b; font: 700 .55rem var(--display); letter-spacing: .12em; }
.mode-card h3 { margin: 0 0 .75rem; font: 600 1.22rem var(--display); }
.mode-card > p:last-child { margin: 0; color: var(--muted); font-size: .9rem; }

.dark-section { display: grid; grid-template-columns: 1fr .95fr; gap: clamp(4rem,8vw,9rem); align-items: center; color: #eaf5f3; background: radial-gradient(circle at 78% 38%,rgba(34,181,167,.16),transparent 27%),var(--night-soft); }
.architecture-copy > p:not(.eyebrow) { max-width: 720px; margin: 1.8rem 0 0; color: #afc4c5; }
.check-list { display: grid; gap: 1rem; margin: 2rem 0 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 1.6rem; color: #acc1c2; font-size: .88rem; }
.check-list li::before { position: absolute; left: 0; color: #65d2c6; content: "✓"; font-weight: 700; }
.check-list strong { color: #f1f8f7; }
.stack-diagram { border: 1px solid #49646c; box-shadow: 0 34px 80px rgba(0,0,0,.24); }
.stack-layer { display: grid; grid-template-columns: 42px 1fr auto; gap: 1.2rem; align-items: center; min-height: 92px; padding: 1rem 1.3rem; color: var(--ink); background: #f8fbfa; border-bottom: 1px solid var(--line); }
.stack-layer:last-child { border-bottom: 0; }
.stack-layer > span { color: var(--aqua); font: 700 .68rem var(--display); }
.stack-layer small { display: block; color: #7d9092; font: 700 .52rem var(--display); letter-spacing: .13em; }
.stack-layer strong { font: 600 .96rem var(--display); }
.stack-layer b { color: #728588; font: 500 .65rem var(--display); }
.stack-layer.protocol { color: #edf8f6; background: var(--aqua-dark); border-color: #157b76; }
.stack-layer.protocol small, .stack-layer.protocol > span { color: #81dbd0; }
.stack-layer.protocol b { color: #bad7d4; }

.configure { background: var(--soft); }
.code-window { position: relative; max-width: 1180px; min-height: 430px; margin: 0 auto; padding-top: 34px; overflow: hidden; color: #d9e9e8; background: #0d1822; border: 1px solid #29414f; box-shadow: 0 36px 90px rgba(34,70,70,.17); }
.window-bar button { margin-left: auto; padding: .22rem .65rem; color: #b6ccca; background: transparent; border: 1px solid #3c5964; cursor: pointer; font: 600 .58rem var(--display); }
.window-bar button:hover, .window-bar button:focus-visible { color: #0d1822; background: #65d2c6; outline: 0; }
.code-window pre { min-height: 340px; display: flex; align-items: center; margin: 0; padding: clamp(1.5rem,5vw,4rem); overflow: auto; font-size: clamp(.78rem,1.4vw,1.12rem); line-height: 1.9; }
.code-type, .code-call { color: #66d3c7; }
.code-keyword { color: #d9a66f; }
.code-number { color: #c5b5ff; }
.code-string { color: #a7d287; }
.code-caption { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; padding: 1px; color: #78a8a6; background: #263d47; font: 700 .52rem var(--display); letter-spacing: .1em; text-align: center; }
.code-caption span { padding: .9rem; background: #09131c; }

.motivation { background: var(--canvas); }
.motivation-note { position: relative; max-width: 1180px; margin: 0 auto 3.5rem; padding: clamp(2rem,4vw,3.4rem); color: #dcebe9; background: radial-gradient(circle at 82% 20%,rgba(34,181,167,.15),transparent 30%),var(--night-soft); border: 1px solid #2e4a53; box-shadow: 0 30px 80px rgba(34,70,70,.16); }
.motivation-note::before { position: absolute; top: 0; left: clamp(2rem,4vw,3.4rem); width: 56px; height: 3px; background: #65d2c6; content: ""; }
.motivation-note blockquote { margin: 0; }
.motivation-note blockquote p { max-width: 64ch; margin: 0; font: 500 clamp(1.05rem,1.7vw,1.46rem)/1.58 var(--display); letter-spacing: -.015em; }
.motivation-note a { color: #65d2c6; border-bottom: 1px solid rgba(101,210,198,.42); }
.motivation-note a:hover, .motivation-note a:focus-visible { border-bottom-color: #65d2c6; }
.motivation-note figcaption { display: flex; align-items: center; gap: .7rem; margin-top: 1.7rem; color: #85a2a4; font-size: .76rem; }
.motivation-note figcaption::before { width: 24px; height: 1px; background: #4a6a70; content: ""; }
.motivation-note figcaption strong { color: #eaf5f3; font: 600 .82rem var(--display); }

.bench-highlights { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; max-width: 1180px; margin: 0 auto 3.5rem; background: var(--line); border: 1px solid var(--line); }
.bench-highlights p { min-height: 118px; display: flex; flex-direction: column; justify-content: center; gap: .35rem; margin: 0; padding: 1.4rem clamp(1.1rem,2.2vw,1.9rem); background: #fff; }
.bench-highlights strong { color: var(--aqua); font: 600 1.55rem var(--display); letter-spacing: -.02em; }
.bench-highlights span { color: var(--muted); font-size: .78rem; }

.chart { max-width: 1180px; margin: 0 auto 2rem; padding: clamp(1.5rem,3vw,2.4rem); background: var(--panel); border: 1px solid var(--line); box-shadow: 0 18px 50px rgba(34,70,70,.06); }
.chart > figcaption { margin-bottom: 2rem; }
.chart > figcaption h3 { margin: 0 0 .35rem; font: 600 1.24rem var(--display); letter-spacing: -.02em; }
.chart > figcaption p { margin: 0; color: var(--muted); font-size: .8rem; }
.bar-chart { display: grid; gap: 1.7rem; margin: 0; padding: 0; list-style: none; }
.bar-title { display: flex; flex-wrap: wrap; align-items: baseline; gap: .6rem; margin: 0 0 .6rem; color: #465e65; font: 600 .79rem var(--display); }
.bar-title b { padding: .16rem .45rem; color: var(--aqua-dark); background: var(--aqua-light); border: 1px solid #b6e0da; font: 700 .62rem var(--display); letter-spacing: .04em; }
.bar-title b.worse { color: #8a5a15; background: #fbf1df; border-color: #e8d2ab; }
.bar, .chart-scale { display: grid; grid-template-columns: 74px minmax(0,1fr) 108px; gap: .9rem; align-items: center; }
.bar + .bar { margin-top: .4rem; }
.bar-series { color: #7f9598; font: 700 .56rem var(--display); letter-spacing: .12em; }
.bar-track { position: relative; height: 26px; background: #fbfdfc; border: 1px solid var(--line); }
.bar-track::before { position: absolute; inset: 0; background: repeating-linear-gradient(to right,rgba(148,175,172,.34) 0 1px,transparent 1px 25%); content: ""; }
.bar-track i { position: relative; z-index: 1; display: block; min-width: 2px; height: 100%; background: #a8bcbd; }
.bar.quicly .bar-track i { background: var(--aqua); }
.bar-value { display: flex; flex-direction: column; align-items: flex-end; font: 600 .82rem var(--display); font-variant-numeric: tabular-nums; }
.bar-value em { color: #8b9ea1; font: 500 .62rem var(--body); font-variant-numeric: tabular-nums; }
.bar.quicly .bar-value { color: var(--aqua-dark); }
.chart-scale { margin: 1.1rem 0 0; }
.chart-scale .ticks { display: flex; justify-content: space-between; color: #93a6a8; font: 600 .58rem var(--display); letter-spacing: .06em; }
.chart-scale .ticks i { font-style: normal; }
.chart-foot { margin: 1.5rem 0 0; padding-top: 1.1rem; color: var(--muted); border-top: 1px solid var(--line); font-size: .76rem; }

.bench-caveats { max-width: 1180px; margin: 2rem auto 0; padding: clamp(1.6rem,3vw,2.4rem); background: var(--soft); border: 1px solid var(--line); }
.bench-caveats h3 { margin: 0 0 1.35rem; font: 600 1rem var(--display); }
.bench-caveats ul { display: grid; gap: .85rem; margin: 0; padding: 0; list-style: none; }
.bench-caveats li { position: relative; padding-left: 1.5rem; color: var(--muted); font-size: .84rem; }
.bench-caveats li::before { position: absolute; top: .72em; left: 0; width: 9px; height: 1px; background: var(--aqua); content: ""; }
.bench-caveats strong { color: var(--ink); font-weight: 600; }
.bench-caveats > p { margin: 1.6rem 0 0; padding-top: 1.2rem; color: #7c8f93; border-top: 1px solid var(--line); font-size: .74rem; }
.bench-caveats code { padding: .1rem .3rem; background: #fff; border: 1px solid var(--line); font-size: .92em; }

@media (max-width: 800px) {
  .bench-highlights { grid-template-columns: 1fr; }
  .bar, .chart-scale { grid-template-columns: 64px minmax(0,1fr) 92px; gap: .65rem; }
}
@media (max-width: 580px) {
  .bar, .chart-scale { grid-template-columns: 54px minmax(0,1fr) 76px; gap: .45rem; }
  .bar-series { font-size: .48rem; letter-spacing: .08em; }
  .bar-value { font-size: .72rem; }
  .bar-value em { font-size: .55rem; }
  .chart-scale .ticks { font-size: .5rem; letter-spacing: 0; }
}

.status { background: #fff; }
.status-card { max-width: 1350px; display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(3rem,7vw,8rem); margin: 0 auto; padding: clamp(2.4rem,5vw,5rem); background: linear-gradient(135deg,#edf8f5,#fff); border: 1px solid var(--line); box-shadow: 0 30px 80px rgba(34,70,70,.1); }
.status-copy > p:not(.eyebrow) { max-width: 700px; margin: 1.7rem 0 0; color: var(--muted); }
.status-list { align-self: center; background: #fff; border: 1px solid var(--line); }
.status-list p { display: grid; grid-template-columns: 72px 1fr; gap: 1rem; align-items: center; min-height: 68px; margin: 0; padding: .8rem 1rem; border-bottom: 1px solid var(--line); }
.status-list p:last-child { border-bottom: 0; }
.status-list span { color: var(--aqua); font: 700 .56rem var(--display); letter-spacing: .1em; }
.status-list strong { font: 600 .78rem var(--display); }
.status-list .pending span { color: #af7b35; }

footer { min-height: 90px; display: flex; justify-content: space-between; align-items: center; gap: 2rem; padding: 1.5rem clamp(1.25rem,5vw,6rem); color: #687d82; background: #fff; border-top: 1px solid var(--line); font-size: .74rem; }
footer p { margin: 0; }
footer div { display: flex; gap: 1.5rem; }
footer a:hover { color: var(--aqua); }
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .65s ease,transform .65s ease; }
.js .reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1120px) {
  .hero, .dark-section { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .transport-panel { justify-self: end; }
  .mode-grid { grid-template-columns: 1fr 1fr; }
  .status-card { grid-template-columns: 1fr; }
}
@media (max-width: 800px) {
  nav a:not(.nav-cta) { display: none; }
  .section-intro { grid-template-columns: 1fr; gap: 1.5rem; }
  .proof-strip { grid-template-columns: 1fr 1fr; }
  .proof-strip p:nth-child(2) { border-right: 0; }
  .proof-strip p:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .transport-panel { grid-template-columns: 1fr; gap: 1rem; padding-inline: 1.4rem; }
  .packet-lanes { min-height: 150px; }
  .endpoint { width: min(280px,100%); justify-self: center; }
  .lane { transform: rotate(90deg); width: 150px; justify-self: center; }
  .transport-footer { display: none; }
  .stack-layer { grid-template-columns: 38px 1fr; }
  .stack-layer b { grid-column: 2; }
}
@media (max-width: 580px) {
  .site-header { padding-inline: 1rem; }
  .site-header nav { display: none; }
  .hero { padding-top: 4rem; }
  h1 { font-size: clamp(3rem,15vw,4.4rem); }
  .actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .mode-grid { grid-template-columns: 1fr; }
  .proof-strip { grid-template-columns: 1fr; }
  .proof-strip p { border-right: 0; border-bottom: 1px solid var(--line); }
  .code-window pre { min-height: 300px; font-size: .68rem; }
  .code-caption { grid-template-columns: 1fr; }
  .status-list p { grid-template-columns: 62px 1fr; }
  footer { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}