:root {
  --bg: #090b18;
  --panel: #12162b;
  --cyan: #46e6ff;
  --pink: #ff4fd8;
  --lime: #b8ff5c;
  --text: #edf4ff;
  --muted: #aab2c8;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Arial, sans-serif;
}

body.alt {
  --cyan: #ffd166;
  --pink: #7bdff2;
  --lime: #f07167;
}

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

.top {
  position: fixed;
  top: 18px;
  left: 5vw;
  right: 5vw;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px 12px 22px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(9, 11, 24, 0.72);
  backdrop-filter: blur(16px);
}

.brand {
  color: var(--cyan);
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.theme-toggle,
.button,
.mode {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  background: linear-gradient(90deg, var(--cyan), var(--pink));
  color: #070914;
  font-weight: 900;
  cursor: pointer;
}

.hero {
  position: relative;
  min-height: 760px;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 120px 5vw 80px;
}

.orb {
  position: absolute;
  width: min(70vw, 760px);
  height: min(70vw, 760px);
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 35%, rgba(70, 230, 255, 0.85), transparent 28%),
    radial-gradient(circle at 68% 60%, rgba(255, 79, 216, 0.7), transparent 30%),
    radial-gradient(circle, rgba(184, 255, 92, 0.32), transparent 62%);
  filter: blur(6px);
  opacity: 0.72;
}

.hero-content {
  position: relative;
  max-width: 960px;
  text-align: center;
}

.micro {
  margin: 0 0 14px;
  color: var(--lime);
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.76rem;
}

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

h1 {
  font-size: clamp(3.2rem, 8vw, 8rem);
  line-height: 0.9;
  letter-spacing: -0.08em;
  margin-bottom: 24px;
}

h2 {
  font-size: clamp(2rem, 4vw, 4.8rem);
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.hero p,
.modules p,
.lab p,
.tiles span,
footer p {
  color: var(--muted);
  line-height: 1.75;
  font-size: 1.05rem;
}

.hero .button {
  display: inline-block;
  margin-top: 24px;
}

.modules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  padding: 40px 5vw 100px;
}

.modules article,
.mode-output,
.tiles div {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 30px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.modules article {
  min-height: 360px;
  padding: 30px;
}

.modules span {
  display: inline-block;
  margin-bottom: 70px;
  color: var(--cyan);
  font-weight: 900;
}

.lab {
  padding: 105px 5vw;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  background: #0d1022;
}

.selector {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

.mode {
  background: var(--panel);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.mode.active {
  background: linear-gradient(90deg, var(--cyan), var(--pink));
  color: #070914;
}

.mode-output {
  grid-column: 2;
  padding: 30px;
}

.mode-output strong {
  display: block;
  color: var(--cyan);
  font-size: 3rem;
  letter-spacing: -0.05em;
  margin-bottom: 12px;
}

.portfolio {
  padding: 110px 5vw;
}

.portfolio h2 {
  max-width: 900px;
}

.tiles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.tiles div {
  padding: 26px;
  min-height: 240px;
}

.tiles b {
  display: block;
  color: var(--pink);
  margin-bottom: 18px;
  font-size: 1.2rem;
}

.system-map {
  padding: 110px 5vw;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 34px;
  background: #0d1022;
}

.system-map p,
.map-grid p,
.build-sequence li,
.assurance p {
  color: var(--muted);
  line-height: 1.75;
}

.map-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.map-grid article {
  padding: 26px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.map-grid span {
  color: var(--lime);
  font-weight: 900;
}

.build-sequence {
  padding: 110px 5vw;
}

.build-sequence ol {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 0;
  margin: 32px 0 0;
  list-style: none;
}

.build-sequence li {
  min-height: 260px;
  padding: 26px;
  border-radius: 28px;
  background: linear-gradient(145deg, rgba(70, 230, 255, 0.12), rgba(255, 79, 216, 0.08));
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.build-sequence b {
  color: var(--cyan);
}

.assurance {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 0 5vw 110px;
}

.assurance div {
  padding: 30px;
  border-radius: 32px;
  background: #05060d;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.assurance strong {
  display: block;
  margin-bottom: 16px;
  color: var(--pink);
  font-size: 2rem;
}

footer {
  padding: 90px 5vw;
  text-align: center;
  background: linear-gradient(180deg, #0d1022, #05060d);
}

footer a {
  color: var(--cyan);
  font-weight: 900;
}

@media (max-width: 860px) {
  .modules,
  .lab,
  .tiles,
  .system-map,
  .map-grid,
  .build-sequence ol,
  .assurance {
    grid-template-columns: 1fr;
  }

  .mode-output {
    grid-column: auto;
  }
}