:root {
  --ink: #18201b;
  --muted: #5f6c62;
  --paper: #fbfcf8;
  --surface: #ffffff;
  --line: #dce3da;
  --green: #1f6b4f;
  --teal: #0f7b7f;
  --amber: #b85d1f;
  --red: #9f3b35;
  --shadow: 0 20px 50px rgba(24, 32, 27, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
}

a {
  color: inherit;
}

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 20;
  padding: 8px 10px;
  background: var(--ink);
  color: white;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 32px;
  background: rgba(251, 252, 248, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  background: var(--green);
  color: white;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  padding: 9px 10px;
  color: var(--muted);
  font-weight: 650;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--ink);
}

.hero {
  position: relative;
  display: grid;
  min-height: 690px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    repeating-linear-gradient(90deg, rgba(31, 107, 79, 0.07) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(15, 123, 127, 0.06) 0 1px, transparent 1px 88px),
    #f6f8f4;
}

.hero::after {
  position: absolute;
  inset: auto 0 0;
  height: 160px;
  content: "";
  background: linear-gradient(180deg, rgba(246, 248, 244, 0), var(--paper));
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(760px, calc(100% - 48px));
  align-self: center;
  margin-left: max(24px, calc((100vw - 1120px) / 2));
  padding: 70px 0 120px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: 6rem;
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: 2.45rem;
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 670px;
  margin: 22px 0 0;
  color: #37443b;
  font-size: 1.28rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  background: var(--ink);
  color: white;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.72);
}

.button:hover,
.button:focus {
  transform: translateY(-1px);
}

.sync-scene {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.node {
  position: absolute;
  display: grid;
  width: 250px;
  min-height: 154px;
  padding: 18px;
  border: 1px solid rgba(24, 32, 27, 0.2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.64);
  box-shadow: var(--shadow);
}

.node span {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
}

.node i {
  display: block;
  height: 12px;
  margin-top: 10px;
  border-radius: 2px;
  background: var(--green);
}

.node i:nth-child(3) {
  width: 78%;
  background: var(--teal);
}

.node i:nth-child(4) {
  width: 58%;
  background: var(--amber);
}

.node i:nth-child(5) {
  width: 88%;
  background: var(--red);
}

.node-a {
  right: 11%;
  top: 150px;
}

.node-b {
  right: 24%;
  bottom: 110px;
}

.packet {
  position: absolute;
  width: 86px;
  height: 14px;
  border-radius: 7px;
  background: var(--teal);
  box-shadow: 0 10px 24px rgba(15, 123, 127, 0.22);
  animation: drift 6s linear infinite;
}

.packet-one {
  right: 35%;
  top: 330px;
}

.packet-two {
  right: 20%;
  top: 405px;
  width: 60px;
  background: var(--amber);
  animation-delay: -2.2s;
}

.packet-three {
  right: 44%;
  top: 475px;
  width: 72px;
  background: var(--green);
  animation-delay: -4s;
}

.shingle-track {
  position: absolute;
  right: 7%;
  bottom: 330px;
  display: grid;
  grid-template-columns: repeat(6, 34px);
  gap: 8px;
  transform: rotate(-10deg);
}

.shingle-track b {
  display: block;
  height: 48px;
  border: 1px solid rgba(24, 32, 27, 0.14);
  border-radius: 6px;
  background: white;
}

.shingle-track b:nth-child(2n) {
  background: #dfeee6;
}

.shingle-track b:nth-child(3n) {
  background: #f3dfc9;
}

@keyframes drift {
  0% {
    transform: translateX(70px);
    opacity: 0;
  }

  18% {
    opacity: 1;
  }

  85% {
    opacity: 1;
  }

  100% {
    transform: translateX(-160px);
    opacity: 0;
  }
}

.quick-strip {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  width: min(1120px, calc(100% - 48px));
  margin: -70px auto 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  box-shadow: var(--shadow);
}

.quick-strip div {
  padding: 24px;
  background: var(--surface);
}

.quick-strip strong,
.quick-strip span {
  display: block;
}

.quick-strip strong {
  font-size: 1.2rem;
}

.quick-strip span {
  margin-top: 2px;
  color: var(--muted);
}

.section {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 96px 0;
}

.two-column,
.protocol {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(340px, 1.1fr);
  gap: 42px;
  align-items: center;
}

.section-copy p,
.protocol p,
.research p {
  max-width: 650px;
  color: var(--muted);
  font-size: 1.08rem;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 28px;
}

.terminal {
  overflow: hidden;
  border: 1px solid #1f2b24;
  border-radius: 8px;
  background: #111812;
  box-shadow: var(--shadow);
}

.terminal-bar {
  display: flex;
  gap: 7px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.terminal-bar span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--red);
}

.terminal-bar span:nth-child(2) {
  background: var(--amber);
}

.terminal-bar span:nth-child(3) {
  background: var(--green);
}

.terminal pre {
  margin: 0;
  padding: 22px;
  overflow-x: auto;
  color: #e8f5eb;
  font-size: 0.92rem;
  line-height: 1.7;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.feature p {
  margin: 0;
  color: var(--muted);
}

.protocol {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.protocol-visual {
  display: grid;
  grid-template-columns: repeat(5, minmax(90px, 1fr));
  gap: 10px;
  align-items: stretch;
  overflow-x: auto;
}

.protocol-visual div {
  display: grid;
  min-height: 96px;
  place-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 800;
  text-align: center;
}

.protocol-visual div:nth-child(2) {
  background: #edf7f4;
}

.protocol-visual div:nth-child(3) {
  background: #f5eee4;
}

.protocol-visual div:nth-child(4) {
  background: #eaf1ec;
}

.protocol-visual div:nth-child(5) {
  background: #f8ecea;
}

.docs-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.docs-list .section-heading {
  grid-column: 1 / -1;
}

.docs-list a {
  display: block;
  min-height: 130px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  text-decoration: none;
}

.docs-list a:hover,
.docs-list a:focus {
  border-color: var(--green);
  transform: translateY(-1px);
}

.docs-list span,
.docs-list small {
  display: block;
}

.docs-list span {
  font-size: 1.08rem;
  font-weight: 800;
}

.docs-list small {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.94rem;
}

.research {
  padding-top: 32px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: center;
  padding: 34px 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer span {
  color: var(--ink);
  font-weight: 800;
}

.site-footer a {
  text-decoration: none;
}

@media (max-width: 920px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 18px 24px;
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .hero {
    min-height: 640px;
  }

  .hero-content {
    padding-top: 58px;
  }

  h1 {
    font-size: 4.4rem;
  }

  h2 {
    font-size: 2rem;
  }

  .node-a {
    right: -34px;
    top: 120px;
  }

  .node-b {
    right: 20px;
    bottom: 62px;
  }

  .shingle-track {
    right: -12px;
    bottom: 280px;
  }

  .quick-strip,
  .two-column,
  .protocol,
  .feature-grid,
  .docs-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-header,
  .section,
  .quick-strip,
  .hero-content {
    width: auto;
  }

  .site-header {
    padding: 16px;
  }

  .nav-links a {
    padding-left: 0;
  }

  .hero {
    min-height: 590px;
  }

  .hero-content {
    width: calc(100% - 32px);
    margin-left: 16px;
    padding-bottom: 100px;
  }

  h1 {
    font-size: 3.4rem;
  }

  h2 {
    font-size: 1.7rem;
  }

  .hero-copy {
    font-size: 1.05rem;
  }

  .quick-strip,
  .section {
    width: calc(100% - 32px);
  }

  .quick-strip {
    margin-top: -44px;
  }

  .quick-strip div,
  .feature,
  .docs-list a {
    padding: 18px;
  }

  .node {
    width: 190px;
    min-height: 132px;
  }

  .node-a {
    right: -88px;
  }

  .node-b {
    right: -64px;
  }

  .shingle-track {
    grid-template-columns: repeat(6, 24px);
    gap: 6px;
  }

  .terminal pre {
    font-size: 0.82rem;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}