:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f3f7f7;
  --surface: #fff;
  --inset: #edf5f4;
  --text: #10272d;
  --muted: #455e64;
  --line: #cbdcdd;
  --accent: #096b56;
  --accent-fill: #08735b;
  --traffic-return: #1a62a2;
  --on-accent: #fff;
  --glow: #b3e9da66;
}
:root {
  color-scheme: dark;
  --bg: #0b1519;
  --surface: #111f25;
  --inset: #14272c;
  --text: #eaf5f4;
  --muted: #a4babd;
  --line: #2b4147;
  --accent: #76e4be;
  --accent-fill: #76e4be;
  --traffic-return: #8bcaff;
  --on-accent: #0c2821;
  --glow: #1b564c55;
}
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: radial-gradient(ellipse 52rem 31rem at 88% 5%, var(--glow), transparent 70%), var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, sans-serif;
}
main { flex: 1; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
p, figure { margin: 0; }
h1, h2, h3 { margin: 0; line-height: 1.1; }
h1 { font-size: clamp(3rem, 7.9vw, 6.6rem); letter-spacing: -.078em; font-weight: 780; }
h1 span, .wordmark span { color: var(--accent); }
.intro-name span:first-child { color: inherit; }
@media (prefers-reduced-motion: no-preference) {
  .intro-name span {
    display: inline-block;
    animation: reveal-name 620ms cubic-bezier(.2, .7, .2, 1) both;
  }
  .intro-name span:last-child { animation-delay: 140ms; }
  @keyframes reveal-name {
    from { opacity: 0; transform: translateY(.18em); }
    to { opacity: 1; transform: translateY(0); }
  }
}
h2 { font-size: clamp(1.85rem, 4.1vw, 3rem); letter-spacing: -.05em; }
h3 { font-size: 1.22rem; letter-spacing: -.024em; }
.shell { width: min(1120px, calc(100% - 64px)); margin-inline: auto; }
.top { display: flex; align-items: center; gap: 26px; min-height: 76px; border-bottom: 1px solid var(--line); }
.wordmark, .eyebrow, .index, figcaption, small {
  font-family: ui-monospace, Consolas, monospace;
}
.wordmark { margin-right: auto; font-size: 1.16rem; font-weight: 750; letter-spacing: -.06em; }
nav { display: flex; align-items: center; gap: clamp(12px, 3vw, 32px); font-size: .91rem; color: var(--muted); }
.theme {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface);
  color: var(--text);
  font: 1.25rem system-ui, sans-serif;
  cursor: pointer;
}
.theme:hover { border-color: var(--accent); color: var(--accent); }
.sun, [data-theme="dark"] .moon { display: none; }
[data-theme="dark"] .sun { display: inline; }
.hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  align-items: center;
  gap: clamp(24px, 5vw, 64px);
  padding-block: clamp(60px, 9vw, 112px);
}
.eyebrow { color: var(--accent); font-size: .76rem; font-weight: 700; letter-spacing: .09em; margin-bottom: 14px; }
.dot { display: inline-block; width: 8px; height: 8px; margin-right: 8px; border-radius: 50%; background: currentColor; }
.lede { max-width: 46ch; color: var(--muted); margin-top: 22px; font-size: clamp(1.04rem, 2vw, 1.17rem); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 29px; }
.button { display: inline-flex; align-items: center; gap: 14px; min-height: 46px; padding: 9px 15px; border-radius: 9px; font-size: .91rem; font-weight: 700; }
.primary { background: var(--accent-fill); color: var(--on-accent); }
.primary:hover { color: var(--on-accent); filter: brightness(.9); }
.secondary { border: 1px solid var(--line); background: var(--surface); }
.secondary:hover { border-color: var(--accent); }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; }
.topology { position: relative; overflow: hidden; box-shadow: 0 22px 60px var(--glow); }
figcaption { padding: 13px 17px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .72rem; letter-spacing: .06em; }
.dots { color: var(--accent); margin-right: 10px; font-size: .6rem; }
.topology svg {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  background-image: radial-gradient(var(--line) 1px, transparent 1px);
  background-size: 15px 15px;
}
.topology svg text { fill: var(--text); font: 16px ui-monospace, Consolas, monospace; }
.wires { fill: none; stroke: var(--muted); stroke-width: 2; opacity: .6; }
.hub, .node { fill: var(--inset); stroke: var(--line); }
.hub { stroke: var(--accent); }
.topology svg .hub-text { fill: var(--accent); font-weight: 700; }
.network-icon { fill: none; stroke: var(--muted); stroke-width: 1.4; stroke-linecap: round; }
.network-port { fill: var(--surface); stroke: var(--accent); stroke-width: 1.5; }
.topology .request { --packet-color: var(--accent); }
.topology .response { --packet-color: var(--traffic-return); }
.packet { fill: var(--packet-color); filter: drop-shadow(0 0 3px var(--packet-color)); }
.packet, .delivery-badges { pointer-events: none; }
.delivery-badges use { color: var(--packet-color); }
#delivery-check circle { fill: var(--surface); stroke: currentColor; }
#delivery-check path { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.network-device { cursor: help; }
.network-device:hover > rect, .network-device:focus-visible > rect { stroke: var(--accent); stroke-width: 2; }
.network-tooltip {
  position: absolute;
  z-index: 1;
  inset: 48% auto auto 50%;
  transform: translate(-50%, -50%);
  width: min(25rem, calc(100% - 32px));
  padding: 10px 14px;
  border: 1px solid var(--accent);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: 0 6px 24px var(--glow);
  pointer-events: none;
  font-size: .85rem;
  line-height: 1.4;
}
.network-tooltip strong { display: block; margin-bottom: 4px; color: var(--accent); }
.network-legend {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 3px 14px;
  padding: 10px 17px;
  border-top: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font-size: .75rem;
}
.network-legend span:first-child { margin-right: auto; }
.network-legend i { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--packet-color); }
.delivery-legend b { color: var(--accent); }
.matrix-rain {
  position: absolute;
  inset: 43px 0 0;
  overflow: hidden;
  pointer-events: none;
  color: var(--accent);
  opacity: .16;
}
.matrix-rain span {
  position: absolute;
  top: 0;
  left: var(--column);
  height: 180px;
  writing-mode: vertical-rl;
  text-orientation: upright;
  font: 10px/1 ui-monospace, Consolas, monospace;
  -webkit-mask-image: linear-gradient(transparent, #000);
  mask-image: linear-gradient(transparent, #000);
  animation: matrix-drop var(--speed) var(--phase) linear infinite;
}
@keyframes matrix-drop {
  from { top: 0; transform: translateY(-100%); }
  to { top: 100%; transform: translateY(0); }
}
.cursor-ring { display: none; }
@media (any-hover: hover) and (any-pointer: fine) and (prefers-reduced-motion: no-preference) {
  .cursor-ring {
    display: block;
    position: fixed;
    z-index: 10;
    top: 0;
    left: 0;
    width: 22px;
    height: 22px;
    border: 1px solid var(--accent);
    border-radius: 50%;
    pointer-events: none;
    translate: -50% -50%;
    opacity: .65;
  }
  .cursor-ring[hidden] { display: none; }
  .cursor-ring.is-following { transition: transform 110ms ease-out; }
}
@media (prefers-reduced-motion: reduce) {
  .matrix-rain, .packet, .delivery-badges, .delivery-legend { display: none; }
}
.section { border-top: 1px solid var(--line); padding-block: 36px 64px; }
.services { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 24px; }
.services article { border: 1px solid var(--line); border-radius: 13px; background: var(--surface); padding: 22px; }
.index { display: inline-block; margin-bottom: 26px; padding: 2px 8px; border-radius: 5px; background: var(--inset); color: var(--accent); font-size: .79rem; }
.services p, .contact p:not(.eyebrow), .empty p:not(.eyebrow) { color: var(--muted); margin-top: 10px; }
.contact { display: grid; grid-template-columns: 1.2fr 1fr; gap: 24px; align-items: center; padding: clamp(20px, 4.8vw, 45px); margin-bottom: 56px; }
.contact-links a { display: block; border-bottom: 1px solid var(--line); padding-block: 8px; font-weight: 650; overflow-wrap: anywhere; }
.contact-links small { display: block; color: var(--muted); letter-spacing: .08em; font-size: .66rem; }
.footer { border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 20px; padding-block: 19px; color: var(--muted); font-size: .85rem; }
.catalog { padding-block: clamp(28px, 5vw, 54px) 66px; }
.catalog > :first-child, .catalog > :first-child:empty + .empty { margin-top: 0; }
.visitor-ip { max-width: 100%; overflow-wrap: anywhere; }
.visitor-ip summary { cursor: pointer; }
.visitor-ip summary:hover { color: var(--accent); }
.visitor-ip p { margin-top: 4px; }
.download-categories:empty { display: none; }
.download-categories { display: grid; gap: 16px; margin-top: 40px; }
.download-category { padding: clamp(16px, 4vw, 28px); }
.download-category h2 { font-size: clamp(1.3rem, 3vw, 1.8rem); overflow-wrap: anywhere; }
.download-list { list-style: none; margin: 12px 0 0; padding: 0; }
.download-list li { border-top: 1px solid var(--line); }
.download-list a { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 2px 16px; padding: 10px 0; overflow-wrap: anywhere; }
.download-meta { color: var(--muted); font-size: .85rem; }
.empty { margin-top: 40px; display: flex; align-items: flex-start; gap: 20px; padding: clamp(18px, 4vw, 36px); }
.empty[hidden] { display: none; }
.empty h2 { font-size: clamp(1.4rem, 3vw, 2.1rem); }
.download-symbol { flex: 0 0 auto; display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 10px; color: var(--accent); background: var(--inset); font-size: 1.45rem; }
.catalog-contact { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 4px 16px; color: var(--muted); }
.catalog-contact a { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
@media (max-width: 760px) {
  .shell { width: calc(100% - 36px); }
  .hero, .contact { grid-template-columns: 1fr; }
  .hero { gap: 32px; }
  .topology { max-width: 530px; }
  .services { grid-template-columns: 1fr; }
  .index { margin-bottom: 12px; }
  .top { gap: 12px; }
}
@media (max-width: 460px) {
  .top { flex-wrap: wrap; padding-block: 12px; }
  nav { order: 1; flex-basis: 100%; justify-content: space-between; }
  h1 { font-size: clamp(2.65rem, 13vw, 3.4rem); }
}