:root {
  --gold: #cca101;
  --gold-light: #e8c84a;
  --gold-dim: #6e5a10;
  --bg: #0a0e14;
  --ink: #f4f1e8;
  color-scheme: dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  min-height: 100vh;
  min-height: 100svh;
  background:
    radial-gradient(circle at 50% calc(50% - 5rem), rgba(204, 161, 1, 0.1), transparent 24rem),
    var(--bg);
}

#stage {
  display: flex;
  min-height: 100vh;
  min-height: 100svh;
  width: 100%;
  padding: clamp(1.5rem, 5vw, 4rem);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
}

#sentinel-eye {
  position: relative;
  width: clamp(20rem, 42vw, 30rem);
  aspect-ratio: 401 / 250;
  margin-bottom: clamp(1.75rem, 4vh, 2.75rem);
  perspective: 900px;
}

#sentinel-eye .hero-logo {
  display: block;
  width: 100%;
  height: 100%;
  will-change: transform;
  transform-style: flat;
}

#sentinel-eye::after {
  content: "";
  position: absolute;
  inset: -85% -70%;
  pointer-events: none;
  background: radial-gradient(
    circle at var(--glow-x, 50%) var(--glow-y, 50%),
    rgba(232, 200, 74, 0.16),
    rgba(232, 200, 74, 0) 38%
  );
  opacity: var(--glow-o, 0);
  transition: opacity 0.8s ease;
}

h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(2rem, 6vw, 3.75rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: clamp(0.28em, 1.2vw, 0.48em);
  text-indent: clamp(0.28em, 1.2vw, 0.48em);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  border: 0;
  white-space: nowrap;
}

.tagline {
  margin: 0.9rem 0 0;
  color: #7f8c9d;
  font-size: clamp(0.8rem, 2vw, 0.95rem);
  line-height: 1.5;
  letter-spacing: 0.08em;
}

@media (max-width: 30rem) {
  body {
    background:
      radial-gradient(circle at 50% calc(50% - 4rem), rgba(204, 161, 1, 0.1), transparent 15rem),
      var(--bg);
  }

  h1 {
    font-size: clamp(1.75rem, 10vw, 2.4rem);
    letter-spacing: 0.24em;
    text-indent: 0.24em;
  }
}

/* One-page company site */

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  overflow-x: hidden;
}

a {
  color: inherit;
}

#top-nav {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  min-height: 4.5rem;
  padding: 0.75rem max(1.25rem, calc((100vw - 1080px) / 2));
  align-items: center;
  border-bottom: 1px solid rgba(204, 161, 1, 0.18);
  background: rgba(10, 14, 20, 0.78);
  box-shadow: 0 0.75rem 2.5rem rgba(0, 0, 0, 0.18);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-100%);
  transition:
    opacity 280ms ease,
    transform 280ms ease;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

#top-nav.nav-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

a.nav-brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  text-decoration: none;
}

a.nav-brand img.nav-logo {
  display: block;
  width: auto;
  height: 2.5rem;
}

.nav-links {
  display: flex;
  margin-left: auto;
  align-items: center;
  gap: clamp(0.8rem, 2.5vw, 2rem);
}

.nav-links a {
  position: relative;
  color: #8e9aaa;
  font-size: 0.72rem;
  line-height: 1.4;
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
  transition: color 180ms ease;
}

.nav-links a::after {
  position: absolute;
  right: 0;
  bottom: -0.4rem;
  left: 0;
  height: 1px;
  background: var(--gold);
  content: "";
  transform: scaleX(0);
  transition: transform 180ms ease;
}

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

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  transform: scaleX(1);
}

#hero {
  position: relative;
  display: grid;
  min-height: 100vh;
  min-height: 100svh;
  width: 100%;
  padding: clamp(5rem, 10vh, 8rem) clamp(1.5rem, 5vw, 4rem);
  align-content: center;
  grid-template-areas:
    "mark"
    "tagline"
    "sub";
  grid-template-columns: minmax(0, 1fr);
  justify-items: center;
  text-align: center;
}

#hero #sentinel-eye {
  margin: 0;
  grid-area: mark;
}

#hero .tagline {
  margin-top: clamp(1.25rem, 3vh, 2rem);
  grid-area: tagline;
  color: #8d897d;
}

.hero-sub {
  max-width: 38rem;
  margin: 1.4rem auto 0;
  grid-area: sub;
  color: #a6b1bf;
  font-size: clamp(0.9rem, 1.8vw, 1.05rem);
  line-height: 1.8;
  word-break: keep-all;
}

.scroll-cue {
  position: absolute;
  bottom: clamp(1.5rem, 4vh, 2.75rem);
  left: 50%;
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 0.65rem;
  color: #667382;
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-decoration: none;
  transform: translateX(-50%);
  animation: scroll-cue-pulse 2.4s ease-in-out infinite;
}

.scroll-cue::after {
  width: 1px;
  height: 2rem;
  background: linear-gradient(to bottom, var(--gold), transparent);
  content: "";
}

@keyframes scroll-cue-pulse {
  0%,
  100% {
    opacity: 0.45;
  }

  50% {
    opacity: 1;
  }
}

main > section:not(#hero) {
  width: min(calc(100% - 3rem), 1080px);
  margin: 0 auto;
  padding: clamp(6rem, 11vw, 8rem) 0;
}

main > section:not(#hero) + section:not(#hero) {
  border-top: 1px solid #141c26;
}

main > section:not(#hero) h2 {
  max-width: 48rem;
  margin: 0 0 clamp(2.75rem, 6vw, 4.5rem);
  color: var(--ink);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: -0.025em;
  word-break: keep-all;
}

.section-label {
  display: block;
  margin-bottom: 0.85rem;
  color: var(--gold);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

#about p {
  max-width: 50rem;
  margin: 0;
  color: #8e9aaa;
  font-size: 1rem;
  line-height: 1.9;
  word-break: keep-all;
}

#about p + p {
  margin-top: 1.25rem;
}

#about .lead {
  color: #d8e0e9;
  font-size: clamp(1.2rem, 2.6vw, 1.65rem);
  line-height: 1.65;
}

#about dl {
  display: grid;
  margin: clamp(2.5rem, 6vw, 4rem) 0 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid #1c2530;
}

#about dt,
#about dd {
  margin: 0;
}

#about dt {
  padding: 1.25rem 1rem 0.45rem 0;
  color: #657181;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

#about dd {
  padding: 0 1rem 1.25rem 0;
  color: #c7d0da;
  font-size: 0.9rem;
  line-height: 1.6;
  word-break: keep-all;
}

.service-grid {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  list-style: none;
}

.service-card {
  min-height: 13rem;
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid #1c2530;
  background: rgba(14, 20, 28, 0.62);
  transition:
    border-color 220ms ease,
    box-shadow 220ms ease,
    transform 220ms ease;
}

.service-card:hover,
.service-card:focus-within {
  border-color: var(--gold);
  box-shadow:
    0 0 0 1px rgba(204, 161, 1, 0.12),
    0 0.9rem 2.5rem rgba(204, 161, 1, 0.12);
  transform: translateY(-0.35rem);
}

.service-card h3 {
  margin: 0;
  color: #dce5ed;
  font-size: 1rem;
  font-weight: 650;
  line-height: 1.4;
  letter-spacing: 0.015em;
}

.service-card p {
  margin: 1rem 0 0;
  color: #7f8c9d;
  font-size: 0.88rem;
  line-height: 1.75;
  word-break: keep-all;
}

.timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 clamp(1.5rem, 4vw, 2.5rem);
  border-left: 1px solid var(--gold-dim);
  list-style: none;
}

.timeline-item {
  position: relative;
  display: grid;
  padding: 0 0 2.75rem;
  grid-template-columns: minmax(6rem, 9rem) minmax(0, 1fr);
  gap: clamp(1rem, 4vw, 3rem);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  position: absolute;
  top: 0.45rem;
  left: calc(0px - clamp(1.5rem, 4vw, 2.5rem) - 0.3rem);
  width: 0.55rem;
  height: 0.55rem;
  border: 2px solid var(--gold);
  border-radius: 50%;
  background: var(--bg);
  box-shadow: 0 0 0.8rem rgba(204, 161, 1, 0.28);
  content: "";
}

.timeline .year {
  color: var(--gold-light);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

.timeline-item h3 {
  margin: 0;
  color: #dce5ed;
  font-size: 1rem;
  font-weight: 620;
  line-height: 1.5;
  word-break: keep-all;
}

.timeline-item p {
  margin: 0.55rem 0 0;
  color: #748191;
  font-size: 0.88rem;
  line-height: 1.7;
  word-break: keep-all;
}

.client-list {
  display: flex;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  list-style: none;
}

.client-list li {
  position: relative;
  margin: 0.45rem 0;
  padding: 0.25rem clamp(0.8rem, 2.4vw, 1.4rem);
  color: #6f7c8c;
  font-size: clamp(0.9rem, 1.8vw, 1.05rem);
  line-height: 1.45;
  transition: color 180ms ease;
}

.client-list li:first-child {
  padding-left: 0;
}

.client-list li:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: 0;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: var(--gold);
  content: "";
  opacity: 0.65;
}

.client-list li:hover {
  color: var(--ink);
}

#contact address {
  max-width: 44rem;
  color: #8e9aaa;
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  font-style: normal;
  line-height: 2;
  word-break: keep-all;
}

#contact address a {
  color: var(--gold-light);
  text-decoration-color: rgba(232, 200, 74, 0.4);
  text-underline-offset: 0.3em;
  transition:
    color 180ms ease,
    text-decoration-color 180ms ease;
}

#contact address a:hover,
#contact address a:focus-visible {
  color: var(--ink);
  text-decoration-color: var(--gold);
}

footer {
  width: min(calc(100% - 3rem), 1080px);
  margin: 0 auto;
  padding: 2rem 0 3rem;
  border-top: 1px solid #141c26;
  color: #53606f;
  font-size: 0.72rem;
  line-height: 1.6;
  letter-spacing: 0.05em;
  text-align: center;
}

.footer-logo {
  display: block;
  width: auto;
  height: 4.5rem;
  margin: 0 auto 1.25rem;
  object-fit: contain;
}

:focus-visible {
  outline: 2px solid var(--gold-light);
  outline-offset: 0.3rem;
}

@media (max-width: 52rem) {
  .service-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #about dl {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 40rem) {
  #top-nav {
    min-height: 4rem;
    padding: 0.65rem 1rem;
  }

  .nav-links {
    gap: 0.7rem;
  }

  .nav-links a {
    font-size: 0.6rem;
    letter-spacing: 0.04em;
  }

  #hero {
    padding-right: 1.25rem;
    padding-left: 1.25rem;
  }

  main > section:not(#hero),
  footer {
    width: min(calc(100% - 2.5rem), 1080px);
  }

  .timeline-item {
    display: block;
    padding-bottom: 2.35rem;
  }

  .timeline .year {
    display: block;
    margin-bottom: 0.45rem;
  }
}

@media (max-width: 30rem) {
  html {
    scroll-padding-top: 4.25rem;
  }

  .nav-links {
    gap: clamp(0.42rem, 2.4vw, 0.68rem);
  }

  .nav-links a {
    font-size: clamp(0.52rem, 2.35vw, 0.6rem);
  }

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

  .service-card {
    min-height: 0;
  }

  #about dl {
    grid-template-columns: minmax(0, 1fr);
  }

  #about dt {
    padding-top: 1rem;
  }

  #about dd {
    padding-bottom: 1rem;
    border-bottom: 1px solid #141c26;
  }

  .client-list li {
    padding-right: 0.7rem;
    padding-left: 0.7rem;
  }
}

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

  #top-nav,
  .nav-links a::after,
  .service-card,
  .scroll-cue {
    transition: none;
  }

  .scroll-cue {
    animation: none;
  }

  .service-card:hover,
  .service-card:focus-within {
    transform: none;
  }
}