:root {
  color-scheme: light;
  --paper: #ffffff;
  --ink: #111827;
  --muted: #303d4f;
  --green: #00523f;
  --line: #b5bfcc;
  --strong-line: #64748b;
  --surface: #f3f4f6;
  --storage: #edf7f2;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 28px; }
body { margin: 0; color: var(--ink); background: var(--paper); }
a { color: inherit; text-decoration: none; }
a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 6px; }
a:hover { color: var(--green); }
svg { stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.page { width: min(1120px, calc(100% - 80px)); margin-inline: auto; }
.skip-link { position: absolute; left: 24px; top: -80px; padding: 12px 18px; background: var(--ink); color: white; z-index: 2; }
.skip-link:focus { top: 12px; }
.skip-link:hover { color: white; }
.site-header { display: flex; align-items: center; justify-content: space-between; min-height: 88px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 20px; font-weight: 650; letter-spacing: -.65px; }
.brand img { display: block; width: 31px; height: 31px; flex-shrink: 0; }
.site-footer a:hover { text-decoration: underline; text-underline-offset: 4px; }
.hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 60px; align-items: center; padding: 68px 0; }
h1 { margin: 0 0 22px; font-size: clamp(40px, 4.5vw, 60px); line-height: 1.1; font-weight: 600; letter-spacing: -2.5px; }
h1 span { color: var(--green); }
.intro { max-width: 410px; margin: 0; color: var(--muted); font-size: 18px; line-height: 1.7; }
.architecture { margin: 0; padding: 24px; border: 1px solid var(--strong-line); border-radius: 8px; background: var(--surface); }
.device-node, .storage-node { display: flex; align-items: center; gap: 15px; padding: 19px 20px; border: 1px solid var(--strong-line); border-radius: 5px; background: var(--paper); }
.device-node { flex-wrap: wrap; }
.query { flex-basis: 100%; border-top: 1px solid var(--line); padding-top: 14px; font: 14px/1.8 "SFMono-Regular", Consolas, "Liberation Mono", monospace; overflow-wrap: anywhere; }
.query span { color: var(--green); }
.node-icon { width: 37px; height: 37px; color: var(--green); flex-shrink: 0; }
.device-node strong, .storage-node strong { display: block; margin-bottom: 5px; font-size: 14px; font-weight: 600; }
.device-node div > span, .storage-node div > span { display: block; color: var(--muted); font-size: 14px; line-height: 1.5; }
.connection { position: relative; display: flex; justify-content: center; height: 88px; align-items: center; }
.connection-line { position: absolute; border-left: 1px dashed var(--green); left: 50%; top: 14px; bottom: 14px; }
.transfer-label { z-index: 1; padding: 7px 9px; background: var(--surface); color: var(--ink); font-size: 14px; line-height: 1.4; }
.connection-arrow { position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); color: var(--green); font-size: 20px; line-height: 1; }
.connection-arrow-up { top: 0; bottom: auto; }
.storage-node { background: var(--storage); }
figcaption { margin-top: 21px; text-align: center; color: var(--muted); font-size: 14px; line-height: 1.6; }
.principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 38px; padding: 38px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.principle h2 { margin: 0 0 12px; font-size: 18px; font-weight: 600; letter-spacing: -.4px; }
.principle p { max-width: 320px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.75; }
.site-footer { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 24px 0; color: var(--muted); font-size: 12px; }
.site-footer a { display: inline-flex; align-items: center; min-height: 44px; }
.site-footer > :first-child { color: var(--ink); font-weight: 600; }
.site-footer a > span { margin-left: 8px; }

@media (min-width: 1400px) {
  .hero { gap: 64px; }
}

@media (max-width: 1000px) {
  .page { width: calc(100% - 64px); }
  .hero { gap: 30px; padding-block: 54px; }
  h1 { font-size: 44px; letter-spacing: -2px; }
  .intro { font-size: 17px; }
  .architecture { padding-inline: 19px; }
  .principles { gap: 28px; }
}

@media (max-width: 720px) {
  .page { width: calc(100% - 40px); }
  .site-header { flex-wrap: wrap; gap: 8px 20px; min-height: 80px; padding-block: 14px; }
  .brand { font-size: 18px; gap: 7px; }
  .brand img { width: 27px; height: 27px; }
  .hero { grid-template-columns: 1fr; gap: 34px; padding: 44px 0 36px; }
  h1 { font-size: clamp(37px, 7.7vw, 54px); letter-spacing: -1.8px; }
  .intro { max-width: 460px; font-size: 17px; }
  .architecture { width: 100%; max-width: 480px; justify-self: center; padding-inline: 24px; }
  .principles { grid-template-columns: 1fr; gap: 28px; padding-block: 32px; }
  .principle p { max-width: 460px; }
  .site-footer { flex-wrap: wrap; row-gap: 12px; }
}

@media (max-width: 360px) {
  .page { width: calc(100% - 32px); }
  .architecture { padding-inline: 15px; }
  .device-node, .storage-node { padding-inline: 13px; gap: 10px; }
  .query span { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}