:root {
  color-scheme: dark;
  --abyss: #061a2b;
  --depth: #0a2638;
  --panel: #0c2e42;
  --panel-soft: rgba(12, 46, 66, 0.72);
  --cyan: #1cc8e5;
  --seafoam: #6ee7c8;
  --mist: #ddf9f3;
  --slate: #8eb1c0;
  --line: rgba(142, 177, 192, 0.2);
  --max-width: 1200px;
  font-family:
    Inter, "Avenir Next", Avenir, "Helvetica Neue", Arial, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 72% 8%, rgba(28, 200, 229, 0.1), transparent 28rem),
    var(--abyss);
  color: var(--mist);
  line-height: 1.55;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 1rem;
  left: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: var(--seafoam);
  color: var(--abyss);
  transform: translateY(-150%);
}

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

.site-header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 3rem), var(--max-width));
  margin: 0 auto;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  text-decoration: none;
}

.brand img {
  border-radius: 0.65rem;
}

.brand span {
  display: grid;
}

.brand strong {
  font-size: 0.98rem;
  letter-spacing: 0.01em;
}

.brand small {
  color: var(--slate);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2.25rem);
}

nav a {
  color: var(--slate);
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
  color: var(--seafoam);
}

main,
footer {
  width: min(calc(100% - 3rem), var(--max-width));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(22rem, 0.92fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
  min-height: 670px;
  padding: 5rem 0 6rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--seafoam);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.status-dot {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.45rem;
  border-radius: 50%;
  background: var(--seafoam);
  box-shadow: 0 0 0 0.25rem rgba(110, 231, 200, 0.12);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 9ch;
  margin-bottom: 1.6rem;
  font-size: clamp(3.5rem, 7vw, 6.8rem);
  line-height: 0.94;
  letter-spacing: -0.065em;
}

h1 span {
  color: var(--cyan);
  font-weight: 500;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

h3 {
  margin-bottom: 0.65rem;
  font-size: 1.25rem;
}

.hero-summary {
  max-width: 37rem;
  color: var(--slate);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.hero-actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin: 2rem 0 1.25rem;
}

.button {
  display: inline-flex;
  min-height: 3rem;
  padding: 0.7rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  align-items: center;
  justify-content: center;
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
}

.button-primary {
  border-color: var(--cyan);
  background: var(--cyan);
  color: var(--abyss);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.025);
  color: var(--mist);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.working-title {
  max-width: 34rem;
  color: var(--slate);
  font-size: 0.76rem;
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 31rem;
}

.scope {
  position: relative;
  width: min(30rem, 90vw);
  aspect-ratio: 1;
  overflow: hidden;
  border: 1px solid rgba(110, 231, 200, 0.35);
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(28, 200, 229, 0.07), transparent 63%),
    rgba(6, 26, 43, 0.86);
  box-shadow:
    inset 0 0 3rem rgba(28, 200, 229, 0.08),
    0 2rem 7rem rgba(0, 0, 0, 0.3);
}

.scope-grid {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 49.8%, rgba(142, 177, 192, 0.16) 50%, transparent 50.2%),
    linear-gradient(transparent 49.8%, rgba(142, 177, 192, 0.16) 50%, transparent 50.2%),
    repeating-radial-gradient(
      circle,
      transparent 0 16.3%,
      rgba(142, 177, 192, 0.13) 16.5%,
      transparent 16.9%
    );
}

.scope-pulse {
  position: absolute;
  inset: 50%;
  width: 1px;
  height: 1px;
  border: 1px solid var(--seafoam);
  border-radius: 50%;
  opacity: 0;
  animation: pulse 5s linear infinite;
}

.pulse-two {
  animation-delay: 1.65s;
}

.pulse-three {
  animation-delay: 3.3s;
}

.scope-center {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.8rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 1.5rem rgba(28, 200, 229, 0.9);
  transform: translate(-50%, -50%);
}

.scope-bearing {
  position: absolute;
  top: 11%;
  left: calc(50% - 1px);
  width: 2px;
  height: 39%;
  background: linear-gradient(transparent, var(--cyan));
  transform-origin: bottom center;
  animation: sweep 12s ease-in-out infinite alternate;
}

.readout {
  position: absolute;
  display: grid;
  min-width: 8.5rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: rgba(6, 26, 43, 0.92);
  box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.22);
}

.readout span {
  color: var(--slate);
  font-family: "JetBrains Mono", "IBM Plex Mono", Consolas, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
}

.readout strong {
  color: var(--seafoam);
  font-family: "JetBrains Mono", "IBM Plex Mono", Consolas, monospace;
  font-size: 0.8rem;
}

.readout-top {
  top: 7%;
  right: -2%;
}

.readout-bottom {
  bottom: 8%;
  left: -3%;
}

section:not(.hero) {
  padding: 6.5rem 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.65fr);
  gap: 3rem;
  align-items: end;
  margin-bottom: 3rem;
}

.section-heading > p {
  margin-bottom: 0;
  color: var(--slate);
}

.lab-shell {
  display: grid;
  grid-template-columns: minmax(15rem, 0.34fr) minmax(0, 0.66fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--panel-soft);
}

.lab-controls {
  display: grid;
  gap: 0.9rem;
  align-content: start;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border-right: 1px solid var(--line);
}

.lab-controls label,
.wave-panel-header,
.wave-scale {
  display: flex;
  justify-content: space-between;
  color: var(--slate);
  font-family: "JetBrains Mono", "IBM Plex Mono", Consolas, monospace;
  font-size: 0.72rem;
}

output {
  color: var(--seafoam);
}

input[type="range"] {
  width: 100%;
  margin: 0 0 1.2rem;
  accent-color: var(--cyan);
}

.equation-card {
  display: grid;
  margin-top: 0.6rem;
  padding: 1rem;
  border: 1px solid rgba(28, 200, 229, 0.25);
  border-radius: 0.65rem;
  background: rgba(28, 200, 229, 0.05);
}

.equation-card span {
  color: var(--slate);
  font-size: 0.72rem;
}

.equation-card strong {
  margin: 0.2rem 0 0.5rem;
  color: var(--cyan);
  font-size: 1.8rem;
}

.equation-card code {
  color: var(--seafoam);
}

.wave-panel {
  display: grid;
  min-height: 25rem;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  grid-template-rows: auto 1fr auto;
}

#wave-canvas {
  display: block;
  width: 100%;
  height: 19rem;
}

.wave-scale {
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
}

.lab-note {
  max-width: 55rem;
  margin: 1rem 0 0;
  color: var(--slate);
  font-size: 0.78rem;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.module-card {
  min-height: 15rem;
  padding: 1.75rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.012);
}

.module-card p:last-child {
  color: var(--slate);
  font-size: 0.88rem;
}

.module-active {
  background: linear-gradient(145deg, rgba(28, 200, 229, 0.12), rgba(110, 231, 200, 0.025));
}

.module-number,
.module-status {
  font-family: "JetBrains Mono", "IBM Plex Mono", Consolas, monospace;
  font-size: 0.66rem;
}

.module-number {
  display: block;
  margin-bottom: 2.8rem;
  color: var(--cyan);
}

.module-status {
  margin-bottom: 0.35rem;
  color: var(--seafoam);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.about-section {
  max-width: 62rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2rem;
}

.about-grid p {
  color: var(--slate);
}

footer {
  display: flex;
  justify-content: space-between;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--line);
  color: var(--slate);
  font-size: 0.76rem;
}

footer a {
  text-decoration: none;
}

footer a:hover,
footer a:focus-visible {
  color: var(--seafoam);
}

@keyframes pulse {
  0% {
    width: 1px;
    height: 1px;
    opacity: 0.75;
    transform: translate(-50%, -50%);
  }
  88%,
  100% {
    width: 91%;
    height: 91%;
    opacity: 0;
    transform: translate(-50%, -50%);
  }
}

@keyframes sweep {
  from {
    transform: rotate(-62deg);
  }
  to {
    transform: rotate(72deg);
  }
}

@media (max-width: 880px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 4rem;
  }

  .hero-copy {
    max-width: 44rem;
  }

  .hero-visual {
    min-height: auto;
  }

  .section-heading,
  .about-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .lab-shell {
    grid-template-columns: 1fr;
  }

  .lab-controls {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

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

@media (max-width: 600px) {
  .site-header {
    width: min(calc(100% - 2rem), var(--max-width));
  }

  nav {
    display: none;
  }

  main,
  footer {
    width: min(calc(100% - 2rem), var(--max-width));
  }

  .hero {
    min-height: auto;
    padding: 3.5rem 0 4.5rem;
  }

  h1 {
    font-size: clamp(3rem, 16vw, 5rem);
  }

  .hero-visual {
    min-height: 22rem;
  }

  .readout {
    display: none;
  }

  section:not(.hero) {
    padding: 4.5rem 0;
  }

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

  .module-card {
    min-height: auto;
  }

  footer {
    gap: 1rem;
    flex-direction: column;
  }
}

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

  .scope-pulse,
  .scope-bearing {
    animation: none;
  }

  .scope-pulse {
    width: 70%;
    height: 70%;
    opacity: 0.3;
    transform: translate(-50%, -50%);
  }
}