:root {
  --ink: #151719;
  --muted: #6b7178;
  --paper: #f6f1e8;
  --white: #fffdf7;
  --night: #080b0e;
  --line: rgba(21, 23, 25, 0.14);
  --teal: #1f6f68;
  --gold: #e3b15b;
  --clay: #b95f4c;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--night);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--white);
  background: var(--night);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  letter-spacing: 0;
  user-select: none;
  -webkit-user-select: none;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  transform: translateY(-150%);
  border-radius: 6px;
  background: var(--white);
  color: var(--ink);
  padding: 10px 14px;
}

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

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10;
  width: 100%;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(8, 11, 14, 0.62);
  backdrop-filter: blur(18px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  min-height: 64px;
  margin: 0 auto;
  gap: 24px;
}

.brand,
.nav-links a {
  text-decoration: none;
}

.brand {
  font-weight: 820;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.92rem;
  font-weight: 720;
}

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

.hero {
  position: relative;
  display: grid;
  min-height: 100svh;
  overflow: hidden;
  place-items: end start;
  padding: 128px 0 68px;
}

.field {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      circle at 80% 26%,
      rgba(31, 111, 104, 0.18),
      transparent 24%
    ),
    radial-gradient(
      circle at 62% 72%,
      rgba(227, 177, 91, 0.12),
      transparent 26%
    ),
    #080b0e;
}

.field canvas {
  width: 100%;
  height: 100%;
  opacity: 1;
}

.field::after {
  content: "";
  position: absolute;
  inset: 0;
  display: block;
  opacity: 1;
  transition: opacity 0.5s ease;
  background:
    linear-gradient(
      90deg,
      rgba(8, 11, 14, 0.74) 0%,
      rgba(8, 11, 14, 0.5) 40%,
      rgba(8, 11, 14, 0.1) 100%
    ),
    linear-gradient(180deg, rgba(8, 11, 14, 0.08), rgba(8, 11, 14, 0.6));
  pointer-events: none;
}

body[data-background-effect="game-of-life"] .field::after {
  background:
    linear-gradient(
      90deg,
      rgba(4, 18, 11, 0.62) 0%,
      rgba(4, 18, 11, 0.42) 40%,
      rgba(4, 18, 11, 0.08) 100%
    ),
    linear-gradient(180deg, rgba(4, 18, 11, 0.04), rgba(4, 18, 11, 0.36));
}

body[data-superhot="on"] .field::after {
  opacity: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: block;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  color: #fff;
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 0.5s ease,
    transform 0.5s ease,
    color 0.5s ease;
}

body[data-superhot="on"] .hero-inner {
  color: #060606;
  opacity: 1;
  transform: translateY(-4px);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 820;
  letter-spacing: 0;
  text-transform: uppercase;
  transition: color 0.5s ease;
}

h1 {
  max-width: 820px;
  margin: 0 0 24px;
  font-size: clamp(4rem, 10vw, 8.2rem);
  line-height: 0.9;
  letter-spacing: 0;
  color: inherit;
  transition:
    color 0.5s ease,
    text-shadow 0.5s ease;
}

.welcome {
  display: inline-block;
  font-size: 0.58em;
  line-height: 1;
  vertical-align: baseline;
}

.intro {
  max-width: 760px;
  margin: 0 0 30px;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(1.05rem, 2vw, 1.34rem);
  line-height: 1.56;
  transition: color 0.5s ease;
}

body[data-superhot="on"] .hero-inner .eyebrow {
  color: #060606;
}

body[data-superhot="on"] .hero-inner h1,
body[data-superhot="on"] .hero-inner .intro {
  color: #060606;
  text-shadow: none;
}

.below {
  background: var(--paper);
  color: var(--ink);
}

.route span,
.route p,
.note,
footer,
.footer-inner,
.route h2 {
  transition:
    color 0.5s ease,
    opacity 0.5s ease,
    border-color 0.5s ease;
}

body[data-superhot="on"] .below {
  color: #060606;
}

body[data-superhot="on"] .route {
  background: rgba(255, 255, 255, 0.96);
}

body[data-superhot="on"] .route span,
body[data-superhot="on"] .route p,
body[data-superhot="on"] .note,
body[data-superhot="on"] footer,
body[data-superhot="on"] .footer-inner {
  color: #060606;
}

body[data-superhot="on"] .route h2 {
  color: #060606;
}

body[data-superhot="on"] .route {
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.18);
}

body[data-superhot="on"] footer {
  background: rgba(255, 255, 255, 0.96);
}

.section {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 70px 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.route-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.route {
  display: flex;
  min-height: 190px;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: var(--white);
  color: var(--ink);
  text-decoration: none;
  box-shadow: 0 18px 46px rgba(21, 23, 25, 0.08);
}

.route:hover,
.route:focus {
  border-color: rgba(31, 111, 104, 0.46);
  transform: translateY(-2px);
}

.route span {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 760;
  text-transform: uppercase;
}

.route h2 {
  margin: 18px 0 8px;
  font-size: 1.28rem;
  letter-spacing: 0;
}

.route p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.note {
  max-width: 720px;
  margin: 0;
  color: var(--ink);
  font-size: 1.02rem;
  line-height: 1.62;
}

footer {
  border-top: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0;
  gap: 20px;
  font-size: 0.9rem;
}

@media (max-width: 760px) {
  .nav-inner,
  .hero-inner,
  .section,
  .footer-inner {
    width: min(100% - 28px, 1120px);
  }

  .nav-links {
    gap: 12px;
    font-size: 0.86rem;
  }

  .nav-links a:nth-child(3) {
    display: none;
  }

  .hero {
    min-height: 94svh;
    padding: 112px 0 44px;
  }

  .route-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }

  .field canvas {
    opacity: 0.42;
  }
}