:root {
  --ink: #0a0d12;
  --deep: #0d121a;
  --panel: #111926;
  --panel-soft: #172333;
  --line: rgba(130, 201, 196, 0.26);
  --aqua: #62d6ff;
  --green: #62f6a5;
  --gold: #ffd166;
  --coral: #ff9d72;
  --sand: #f2ead7;
  --white: #fbf7ec;
  --muted: #c7d4d4;
  --muted-strong: #dce9e6;
  --shadow: 0 26px 70px rgba(0, 0, 0, 0.32);
  --max-width: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(circle at 16% 0, rgba(98, 214, 255, 0.2), transparent 30rem),
    radial-gradient(circle at 92% 18%, rgba(98, 246, 165, 0.12), transparent 24rem),
    linear-gradient(180deg, var(--ink) 0%, var(--deep) 46%, #10130f 100%);
  color: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  margin: 0;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

.skip-link {
  background: var(--gold);
  border-radius: 8px;
  color: #18222a;
  font-weight: 900;
  left: 1rem;
  padding: 0.65rem 0.85rem;
  position: absolute;
  text-decoration: none;
  top: -5rem;
  z-index: 30;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  background: rgba(10, 13, 18, 0.88);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
}

.nav {
  align-items: center;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 0.9rem clamp(1rem, 3vw, 1.5rem);
}

.brand {
  color: var(--white);
  flex: 0 0 auto;
  font-weight: 900;
  line-height: 1;
  text-decoration: none;
}

.brand span {
  color: var(--green);
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

.nav-links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 0.95rem;
  justify-content: flex-end;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 800;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus,
.nav-links a[aria-current="page"] {
  color: var(--green);
}

main,
.footer-inner {
  margin: 0 auto;
  max-width: var(--max-width);
  padding-left: clamp(1rem, 3vw, 2rem);
  padding-right: clamp(1rem, 3vw, 2rem);
}

.hero {
  align-items: center;
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 1.08fr);
  min-height: calc(100vh - 74px);
  padding: clamp(3rem, 8vw, 7rem) 0 clamp(2.4rem, 6vw, 5rem);
}

.page-hero {
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2rem, 6vw, 4rem);
}

.page-hero .lede {
  max-width: 56rem;
}

.hero-mini {
  min-height: 0;
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}

h1,
h2,
h3 {
  letter-spacing: 0;
  line-height: 1.04;
  margin: 0;
}

h1 {
  font-size: clamp(2.8rem, 7vw, 6.3rem);
  max-width: 10ch;
}

.page-hero h1 {
  max-width: 12ch;
}

h2 {
  font-size: clamp(2rem, 4.5vw, 4rem);
  max-width: 13ch;
}

h3 {
  font-size: clamp(1.28rem, 1.8vw, 1.75rem);
}

p {
  color: var(--muted);
  font-size: clamp(1.02rem, 1.35vw, 1.18rem);
  margin: 1rem 0 0;
}

ul,
ol {
  color: var(--muted);
  font-size: clamp(1rem, 1.25vw, 1.12rem);
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

li + li {
  margin-top: 0.45rem;
}

.eyebrow {
  color: var(--green);
  font-size: 0.9rem;
  font-weight: 900;
  letter-spacing: 0;
  margin: 0 0 0.75rem;
  text-transform: uppercase;
}

.lede {
  color: #edf7f2;
  font-size: clamp(1.18rem, 2vw, 1.55rem);
  max-width: 43rem;
}

.hero-card,
.panel,
.image-card,
.road-card,
.feature-band,
.link-card,
.flow-step,
.spec-card,
.device-strip {
  background: linear-gradient(145deg, rgba(23, 35, 51, 0.94), rgba(12, 16, 24, 0.96));
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-card,
.image-card {
  overflow: hidden;
}

.hero-card img,
.image-card img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  width: 100%;
}

.hero-card.contain img,
.image-card.contain img {
  background: rgba(251, 247, 236, 0.94);
  object-fit: contain;
}

.hero-card figcaption,
.image-card figcaption {
  color: var(--muted);
  font-size: 0.98rem;
  padding: 1rem 1.2rem 1.2rem;
}

.actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.6rem;
}

.button {
  align-items: center;
  border: 1px solid rgba(98, 214, 255, 0.62);
  border-radius: 8px;
  color: var(--aqua);
  display: inline-flex;
  font-weight: 900;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.75rem 1rem;
  text-decoration: none;
}

.button.primary {
  background: rgba(98, 246, 165, 0.12);
  border-color: rgba(98, 246, 165, 0.72);
  color: var(--green);
}

.button.gold {
  border-color: rgba(255, 209, 102, 0.64);
  color: var(--gold);
}

.section {
  padding: clamp(2.7rem, 7vw, 6rem) 0;
}

.section-heading {
  max-width: 56rem;
}

.split {
  align-items: start;
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
}

.split.equal {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid,
.link-grid,
.spec-grid,
.phase-grid,
.flow-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.link-grid,
.spec-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.phase-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.flow-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.card-section {
  grid-template-columns: 1fr;
}

.card-section > :first-child {
  max-width: 56rem;
}

.card-section > .grid,
.card-section > .link-grid,
.card-section > .spec-grid,
.card-section > .tech-list {
  margin-top: 0;
}

.card-section > .tech-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.panel,
.road-card,
.link-card,
.flow-step,
.spec-card {
  padding: clamp(1.05rem, 2.5vw, 1.5rem);
}

.panel strong,
.road-card strong,
.link-card strong,
.flow-step strong,
.spec-card strong {
  color: var(--white);
  display: block;
  font-size: 1.22rem;
  line-height: 1.15;
}

.panel p,
.road-card p,
.link-card p,
.flow-step p,
.spec-card p {
  font-size: 1rem;
}

.link-card {
  text-decoration: none;
}

.link-card:hover,
.link-card:focus {
  border-color: rgba(98, 246, 165, 0.62);
}

.card-label,
.phase-label {
  color: var(--gold);
  display: block;
  font-size: 0.82rem;
  font-weight: 900;
  margin-bottom: 0.45rem;
  text-transform: uppercase;
}

.feature-band {
  align-items: center;
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
  grid-template-columns: minmax(0, 0.65fr) minmax(0, 1fr);
  margin-top: 1.6rem;
  overflow: hidden;
  padding: clamp(1.3rem, 4vw, 2.4rem);
}

.feature-band h2 {
  max-width: 16ch;
}

.notice {
  background: rgba(255, 209, 102, 0.1);
  border: 1px solid rgba(255, 209, 102, 0.32);
  border-radius: 8px;
  color: var(--sand);
  margin-top: 1.4rem;
  padding: 1rem 1.2rem;
}

.notice strong {
  color: var(--white);
}

.tech-list {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.device-strip {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1.5rem;
  padding: clamp(1.1rem, 3vw, 1.6rem);
}

.screen-mock {
  background:
    linear-gradient(135deg, rgba(98, 214, 255, 0.16), rgba(98, 246, 165, 0.12)),
    rgba(8, 11, 16, 0.84);
  border: 1px solid rgba(98, 214, 255, 0.28);
  border-radius: 8px;
  min-height: 12rem;
  padding: 1rem;
}

.screen-mock small {
  color: var(--green);
  display: block;
  font-weight: 900;
  text-transform: uppercase;
}

.screen-mock b {
  color: var(--white);
  display: block;
  font-size: 1.45rem;
  line-height: 1.1;
  margin-top: 0.7rem;
}

.screen-mock span {
  color: var(--muted);
  display: block;
  margin-top: 0.7rem;
}

.screen-mock.paper {
  background: rgba(242, 234, 215, 0.1);
  border-color: rgba(255, 209, 102, 0.34);
}

.screen-mock.emergency {
  background:
    linear-gradient(135deg, rgba(255, 157, 114, 0.2), rgba(255, 209, 102, 0.13)),
    rgba(8, 11, 16, 0.9);
  border-color: rgba(255, 157, 114, 0.42);
}

.timeline {
  border-left: 1px solid var(--line);
  margin-top: 1.5rem;
  padding-left: 1rem;
}

.timeline article {
  margin-top: 1.2rem;
}

.timeline article:first-child {
  margin-top: 0;
}

.timeline strong {
  color: var(--white);
  display: block;
}

.page-nav {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: clamp(2rem, 5vw, 4rem);
  padding: 1.2rem 0 clamp(2.5rem, 6vw, 4rem);
}

.page-nav a {
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  padding: 1rem;
  text-decoration: none;
}

.page-nav a:hover,
.page-nav a:focus {
  border-color: rgba(98, 246, 165, 0.62);
  color: var(--white);
}

.page-nav span {
  color: var(--green);
  display: block;
  font-size: 0.8rem;
  font-weight: 900;
  text-transform: uppercase;
}

.page-nav strong {
  color: var(--white);
  display: block;
  font-size: 1.18rem;
  line-height: 1.2;
  margin-top: 0.3rem;
}

.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 2rem 0;
}

.footer p {
  font-size: 0.98rem;
  margin: 0;
}

.footer a {
  color: var(--aqua);
  font-weight: 800;
}

.to-top {
  align-items: center;
  background: rgba(10, 13, 18, 0.88);
  border: 1px solid rgba(98, 246, 165, 0.52);
  border-radius: 999px;
  bottom: 1.1rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.36);
  color: var(--green);
  display: inline-flex;
  height: 3rem;
  justify-content: center;
  position: fixed;
  right: 1.1rem;
  text-decoration: none;
  width: 3rem;
  z-index: 25;
}

.js-ready .to-top {
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.45rem);
  transition: opacity 160ms ease, transform 160ms ease;
}

.js-ready .to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.to-top svg {
  height: 1.25rem;
  width: 1.25rem;
}

.to-top:hover,
.to-top:focus {
  background: rgba(98, 246, 165, 0.14);
  outline: 2px solid rgba(98, 246, 165, 0.35);
  outline-offset: 3px;
}

code {
  background: rgba(98, 214, 255, 0.1);
  border: 1px solid rgba(98, 214, 255, 0.2);
  border-radius: 5px;
  color: var(--sand);
  font-size: 0.95em;
  padding: 0.08rem 0.3rem;
}

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

  .grid,
  .link-grid,
  .spec-grid,
  .phase-grid,
  .flow-grid,
  .device-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .site-header {
    position: static;
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero {
    min-height: auto;
    padding-top: 2.2rem;
  }

  .page-hero {
    padding-top: 2.5rem;
  }

  .grid,
  .link-grid,
  .spec-grid,
  .phase-grid,
  .flow-grid,
  .tech-list,
  .device-strip,
  .page-nav {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 9ch;
  }

  .button {
    width: 100%;
  }

  .to-top {
    bottom: 0.85rem;
    height: 2.75rem;
    right: 0.85rem;
    width: 2.75rem;
  }
}