:root {
  --navy-950: #050b14;
  --navy-900: #07111f;
  --navy-850: #0a1728;
  --navy-800: #0d1d32;
  --navy-750: #122640;
  --navy-700: #183251;
  --blue-500: #3b82f6;
  --blue-400: #60a5fa;
  --cyan-400: #67d4e4;
  --green-400: #70d7a7;
  --white: #f6f9fc;
  --text: #dbe6f2;
  --muted: #9aadc1;
  --muted-dark: #71869b;
  --border: #203750;
  --border-soft: rgba(126, 163, 199, 0.18);
  --container: 1180px;
  --radius: 10px;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--navy-900);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

code,
pre {
  font-family: var(--mono);
}

code {
  padding: 2px 5px;
  color: #c9e3ff;
  background: #0a1828;
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  font-size: 0.9em;
}

pre {
  margin: 24px 0 0;
  padding: 18px 20px;
  overflow-x: auto;
  color: #d8eaff;
  background: #050d17;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.7;
}

pre code {
  padding: 0;
  color: inherit;
  background: transparent;
  border: 0;
  border-radius: 0;
  font-size: inherit;
}

::selection {
  color: var(--white);
  background: rgba(59, 130, 246, 0.55);
}

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 4px;
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 10px 14px;
  color: var(--navy-950);
  background: var(--white);
  border-radius: 6px;
  font-weight: 700;
  transform: translateY(-150%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 17, 31, 0.96);
  border-bottom: 1px solid var(--border-soft);
  backdrop-filter: blur(12px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--navy-750);
  border: 1px solid #315276;
  border-radius: 8px;
  font: 700 12px/1 var(--mono);
  letter-spacing: 0.05em;
}

.brand > span:last-child {
  display: grid;
  line-height: 1.2;
}

.brand strong {
  color: var(--white);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.brand small {
  margin-top: 4px;
  color: var(--muted-dark);
  font-size: 10px;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.desktop-nav a {
  padding: 8px 12px;
  color: var(--muted);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 650;
}

.desktop-nav a:hover,
.desktop-nav a:focus-visible {
  color: var(--white);
  background: var(--navy-800);
}

.desktop-nav .nav-contact {
  margin-left: 8px;
  color: var(--white);
  border: 1px solid var(--border);
}

.mobile-nav {
  position: relative;
  display: none;
}

.mobile-nav summary {
  padding: 8px 11px;
  color: var(--white);
  background: var(--navy-800);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  list-style: none;
}

.mobile-nav summary::-webkit-details-marker {
  display: none;
}

.mobile-nav nav {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 190px;
  display: grid;
  padding: 8px;
  background: var(--navy-800);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.3);
}

.mobile-nav nav a {
  padding: 9px 10px;
  color: var(--muted);
  border-radius: 5px;
  font-size: 13px;
}

.mobile-nav nav a:hover {
  color: var(--white);
  background: var(--navy-750);
}

.hero {
  padding: 92px 0 70px;
  background: var(--navy-900);
  border-bottom: 1px solid var(--border-soft);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: 46px;
}

.hero-copy {
  max-width: 820px;
  margin-inline: auto;
  text-align: center;
}

.eyebrow,
.section-label,
.guide-category {
  margin: 0 0 16px;
  color: var(--blue-400);
  font: 700 10px/1.4 var(--mono);
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 720px;
  margin: 0 auto;
  color: var(--white);
  font-size: clamp(2.6rem, 5vw, 4.2rem);
  font-weight: 720;
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.hero-intro {
  max-width: 700px;
  margin: 26px auto 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 32px;
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 17px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-size: 12px;
  font-weight: 700;
}

.primary-button {
  color: var(--white);
  background: #2868ce;
  border-color: #3e7ddd;
}

.primary-button:hover {
  background: #3174dc;
}

.secondary-button {
  color: var(--text);
  background: var(--navy-800);
  border-color: var(--border);
}

.secondary-button:hover {
  color: var(--white);
  background: var(--navy-750);
}

.lab-summary {
  width: min(100%, 820px);
  margin-inline: auto;
  background: var(--navy-850);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.summary-heading {
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--border-soft);
}

.summary-heading p {
  margin: 0;
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
}

.summary-heading span {
  padding: 4px 6px;
  color: var(--green-400);
  background: rgba(112, 215, 167, 0.06);
  border: 1px solid rgba(112, 215, 167, 0.2);
  border-radius: 4px;
  font: 700 7px/1 var(--mono);
  letter-spacing: 0.08em;
}

.lab-summary dl {
  margin: 0;
  padding: 10px 20px 16px;
}

.lab-summary dl div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-soft);
}

.lab-summary dl div:last-child {
  border-bottom: 0;
}

.lab-summary dt {
  color: var(--muted-dark);
  font: 600 9px/1.5 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.lab-summary dd {
  margin: 0;
  color: var(--text);
  font-size: 11px;
  text-align: right;
}

.address-note {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 22px;
  margin-top: 28px;
  padding: 16px 18px;
  color: var(--muted);
  background: rgba(59, 130, 246, 0.05);
  border: 1px solid rgba(96, 165, 250, 0.2);
  border-radius: 7px;
  font-size: 12px;
}

.address-note strong {
  color: var(--blue-400);
}

.address-note p {
  margin: 0;
}

.section {
  padding: 92px 0;
  border-bottom: 1px solid var(--border-soft);
}

.section-heading {
  max-width: 820px;
  margin: 0 auto 44px;
  text-align: center;
}

.section-heading h2,
.contact-section h2 {
  margin: 0;
  color: var(--white);
  font-size: clamp(2rem, 3.5vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.split-heading {
  display: block;
}

.split-heading > p,
.heading-description {
  max-width: 670px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.heading-description {
  margin-top: 20px;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.overview-grid article {
  min-height: 220px;
  padding: 25px;
  background: var(--navy-850);
  border-right: 1px solid var(--border-soft);
  text-align: center;
}

.overview-grid article:last-child {
  border-right: 0;
}

.overview-grid article > span {
  color: var(--blue-400);
  font: 700 10px/1 var(--mono);
}

.overview-grid h3 {
  margin: 44px 0 10px;
  color: var(--white);
  font-size: 16px;
}

.overview-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.architecture-section {
  background: #081321;
}

.route-line {
  display: grid;
  grid-template-columns: 1fr 40px 1fr 40px 1fr;
  align-items: center;
  width: min(100%, 1020px);
  margin: 0 auto 22px;
}

.route-line > div {
  min-height: 110px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px;
  background: var(--navy-850);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.route-line > div.route-highlight {
  background: #102747;
  border-color: #315b8a;
}

.route-line > b {
  color: var(--blue-400);
  text-align: center;
  font: 500 18px/1 var(--mono);
}

.route-line small,
.zone-heading span {
  color: var(--blue-400);
  font: 700 8px/1 var(--mono);
  letter-spacing: 0.1em;
}

.route-line strong {
  margin-top: 10px;
  color: var(--white);
  font-size: 15px;
}

.route-line div > span {
  margin-top: 5px;
  color: var(--muted-dark);
  font-size: 11px;
}

.zone-grid {
  width: min(100%, 1080px);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-inline: auto;
}

.zone-grid article {
  min-height: 260px;
  padding: 24px;
  background: var(--navy-850);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.zone-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.zone-heading b {
  padding: 4px 6px;
  color: var(--green-400);
  background: rgba(112, 215, 167, 0.05);
  border: 1px solid rgba(112, 215, 167, 0.16);
  border-radius: 4px;
  font: 700 7px/1 var(--mono);
  letter-spacing: 0.07em;
}

.zone-grid h3 {
  margin: 40px 0 8px;
  color: var(--white);
  font-size: 19px;
}

.zone-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.zone-grid ul {
  display: grid;
  gap: 8px;
  margin: 22px 0 0;
  padding: 18px 0 0 17px;
  color: var(--muted-dark);
  border-top: 1px solid var(--border-soft);
  font-size: 10px;
}

.build-section {
  background: var(--navy-900);
}

.guide-index {
  width: min(100%, 1020px);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0 auto 32px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.guide-index a {
  min-height: 58px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  color: var(--muted);
  background: var(--navy-850);
  border-right: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  font-size: 11px;
}

.guide-index a:nth-child(4n) {
  border-right: 0;
}

.guide-index a:nth-last-child(-n + 4) {
  border-bottom: 0;
}

.guide-index a:hover,
.guide-index a:focus-visible {
  color: var(--white);
  background: var(--navy-750);
}

.guide-index span {
  color: var(--blue-400);
  font: 700 9px/1 var(--mono);
}

.guides {
  display: grid;
  gap: 28px;
}

.guide {
  width: min(100%, 1080px);
  margin-inline: auto;
  overflow: hidden;
  background: var(--navy-850);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.guide-header {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: 30px;
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.guide-number {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  color: var(--blue-400);
  background: var(--navy-800);
  border: 1px solid var(--border);
  border-radius: 8px;
  font: 700 13px/1 var(--mono);
  margin-inline: auto;
}

.guide-category {
  margin-bottom: 8px;
}

.guide-header h3 {
  margin: 0;
  color: var(--white);
  font-size: clamp(1.35rem, 2vw, 1.8rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.guide-header div:last-child > p:last-child {
  max-width: 760px;
  margin: 10px auto 0;
  color: var(--muted);
  font-size: 13px;
}

.guide-body {
  display: grid;
  grid-template-columns: 290px 1fr;
}

.guide-context {
  padding: 30px;
  background: #081421;
  border-right: 1px solid var(--border);
}

.guide-context > div:not(.technology-list) {
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-soft);
}

.guide h4 {
  margin: 0 0 9px;
  color: var(--white);
  font-size: 11px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.guide-context p,
.guide-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
}

.technology-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.technology-list span {
  padding: 5px 7px;
  color: var(--muted);
  background: var(--navy-800);
  border: 1px solid var(--border-soft);
  border-radius: 5px;
  font: 600 8px/1 var(--mono);
}

.procedure {
  padding: 30px clamp(30px, 5vw, 60px) 38px;
}

.procedure > h4 {
  margin-bottom: 24px;
}

.procedure ol {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  counter-reset: build-step;
  list-style: none;
}

.procedure ol[start="4"] {
  counter-reset: build-step 3;
  margin-top: 24px;
}

.procedure ol[start="5"] {
  counter-reset: build-step 4;
  margin-top: 24px;
}

.procedure ol[start="6"] {
  counter-reset: build-step 5;
  margin-top: 24px;
}

.procedure li {
  position: relative;
  padding: 0 0 24px 48px;
  border-left: 1px solid var(--border);
  counter-increment: build-step;
}

.procedure li:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.procedure li::before {
  position: absolute;
  top: -1px;
  left: -14px;
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  color: var(--blue-400);
  background: var(--navy-800);
  border: 1px solid #315274;
  border-radius: 50%;
  content: counter(build-step, decimal-leading-zero);
  font: 700 8px/1 var(--mono);
}

.procedure li strong {
  display: block;
  color: var(--text);
  font-size: 13px;
}

.procedure li p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
}

.guide-footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--border);
}

.guide-footer > div {
  padding: 26px 30px;
}

.guide-footer > div:first-child {
  border-right: 1px solid var(--border);
}

.guide-footer ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 11px;
}

.roadmap-section {
  background: #081321;
}

.roadmap-grid {
  width: min(100%, 1040px);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-inline: auto;
}

.roadmap-grid article {
  min-height: 220px;
  padding: 26px;
  background: var(--navy-850);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
}

.roadmap-grid span {
  color: var(--blue-400);
  font: 700 8px/1 var(--mono);
  letter-spacing: 0.09em;
}

.roadmap-grid h3 {
  margin: 56px 0 10px;
  color: var(--white);
  font-size: 17px;
}

.roadmap-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.contact-section {
  padding: 70px 0;
  background: #0d2a4f;
  border-bottom: 1px solid #234e7c;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: 30px;
  text-align: center;
}

.contact-section h2 {
  font-size: clamp(1.9rem, 3vw, 2.7rem);
}

.contact-section p:not(.section-label) {
  max-width: 650px;
  margin: 14px auto 0;
  color: #b7c9dc;
  font-size: 13px;
}

.contact-links {
  width: min(100%, 430px);
  display: grid;
  gap: 8px;
  margin-inline: auto;
}

.contact-links a {
  padding: 10px 12px;
  color: var(--text);
  background: rgba(5, 17, 32, 0.32);
  border: 1px solid rgba(161, 195, 230, 0.22);
  border-radius: 6px;
  font-size: 11px;
}

.contact-links a:hover {
  color: var(--white);
  background: rgba(5, 17, 32, 0.5);
}

.site-footer {
  background: var(--navy-950);
}

.footer-inner {
  min-height: 110px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  color: var(--muted-dark);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-inner p {
  margin: 0;
}

.footer-inner strong {
  color: var(--text);
}

.footer-inner a:hover {
  color: var(--white);
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: 780px;
  }

  .lab-summary {
    max-width: 680px;
  }

  .overview-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .overview-grid article:nth-child(2) {
    border-right: 0;
  }

  .overview-grid article:nth-child(-n + 2) {
    border-bottom: 1px solid var(--border-soft);
  }

  .guide-body {
    grid-template-columns: 240px 1fr;
  }

  .guide-index {
    grid-template-columns: repeat(2, 1fr);
  }

  .guide-index a:nth-child(2n) {
    border-right: 0;
  }

  .guide-index a:nth-child(-n + 6) {
    border-bottom: 1px solid var(--border-soft);
  }

  .guide-index a:nth-last-child(-n + 2) {
    border-bottom: 0;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .desktop-nav {
    display: none;
  }

  .mobile-nav {
    display: block;
  }

  .hero {
    padding: 70px 0 56px;
  }

  .hero h1 {
    font-size: clamp(2.4rem, 11vw, 3.6rem);
  }

  .section {
    padding: 70px 0;
  }

  .split-heading,
  .contact-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .overview-grid,
  .zone-grid,
  .roadmap-grid {
    grid-template-columns: 1fr;
  }

  .overview-grid article {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border-soft);
  }

  .overview-grid article:last-child {
    border-bottom: 0;
  }

  .overview-grid h3 {
    margin-top: 26px;
  }

  .route-line {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .route-line > b {
    transform: rotate(90deg);
  }

  .guide-header {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 24px;
    text-align: center;
  }

  .guide-number {
    width: 44px;
    height: 44px;
  }

  .guide-body {
    grid-template-columns: 1fr;
  }

  .guide-context {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .procedure {
    padding: 28px 24px 34px;
  }

  .guide-footer {
    grid-template-columns: 1fr;
  }

  .guide-footer > div:first-child {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .contact-links {
    min-width: 0;
  }
}

@media (max-width: 520px) {
  .brand small {
    display: none;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .lab-summary dl div {
    grid-template-columns: 90px 1fr;
  }

  .address-note {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .guide-index {
    grid-template-columns: 1fr;
  }

  .guide-index a {
    border-right: 0;
    border-bottom: 1px solid var(--border-soft) !important;
  }

  .guide-index a:last-child {
    border-bottom: 0 !important;
  }

  .guide-header {
    grid-template-columns: 1fr;
  }

  .procedure li {
    padding-left: 38px;
  }

  .footer-inner {
    min-height: 140px;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 10px;
  }
}

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

@media print {
  body {
    color: #142033;
    background: white;
  }

  .site-header,
  .hero-actions,
  .guide-index,
  .contact-section,
  .site-footer {
    display: none;
  }

  .hero,
  .section,
  .architecture-section,
  .build-section,
  .roadmap-section {
    color: #142033;
    background: white;
    border-color: #d5dde7;
  }

  .hero h1,
  .section-heading h2,
  .guide-header h3,
  .guide h4,
  .overview-grid h3,
  .zone-grid h3,
  .roadmap-grid h3 {
    color: #07111f;
  }

  .lab-summary,
  .overview-grid article,
  .route-line > div,
  .zone-grid article,
  .guide,
  .guide-context,
  .roadmap-grid article,
  pre {
    color: #142033;
    background: #f5f7fa;
    border-color: #cfd8e3;
  }

  .guide {
    break-inside: avoid;
  }

  .guide-body {
    grid-template-columns: 230px 1fr;
  }

  .guide-footer {
    break-inside: avoid;
  }
}