:root {
  --bg-0: #02040a;
  --bg-1: #081224;
  --bg-2: #0d1d37;
  --text: #f3f8ff;
  --muted: #9ab0cf;
  --accent: #4bb4ff;
  --accent-soft: #9fd8ff;
  --line: rgba(146, 199, 255, 0.24);
  --glass-bg: rgba(13, 21, 38, 0.56);
  --glass-bg-strong: rgba(16, 28, 52, 0.7);
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.45);
  --radius: 20px;
  --radius-sm: 14px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 16% -5%, rgba(70, 162, 255, 0.18), transparent 38%),
    radial-gradient(circle at 86% 10%, rgba(62, 128, 246, 0.16), transparent 40%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1) 46%, var(--bg-0) 100%);
  line-height: 1.6;
  overflow-x: hidden;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Syne", "Segoe UI", sans-serif;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

p {
  margin: 0;
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: min(1120px, calc(100% - 3rem));
  margin: 0 auto;
}

.page-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 10% 80%, rgba(80, 174, 255, 0.1), transparent 40%),
    radial-gradient(circle at 90% 20%, rgba(33, 111, 255, 0.08), transparent 38%);
  z-index: -1;
}

.glass {
  background: linear-gradient(145deg, var(--glass-bg), var(--glass-bg-strong));
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.section {
  position: relative;
  padding: clamp(5rem, 10vh, 8rem) 0;
  scroll-margin-top: 7rem;
}

.eyebrow {
  margin-bottom: 1rem;
  color: var(--accent-soft);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.section h2 {
  font-size: clamp(2.1rem, 4.8vw, 4rem);
  max-width: 880px;
}

.section-text {
  margin-top: 1.15rem;
  color: var(--muted);
  max-width: 62ch;
}

.section-head {
  margin-bottom: 2.2rem;
}

.grid {
  display: grid;
  gap: 1.1rem;
}

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

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

.card,
.stack-card,
.exp-card {
  border-radius: var(--radius);
  padding: 1.35rem;
}

.card h3,
.stack-card h3,
.exp-card h3 {
  font-size: 1.28rem;
  margin-bottom: 0.5rem;
}

.card p,
.stack-card p,
.exp-card p {
  color: var(--muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.84rem 1.3rem;
  font-size: 0.94rem;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(95deg, #52b6ff, #89ddff);
  color: #03111f;
  box-shadow: 0 12px 30px rgba(84, 184, 255, 0.35);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
  background: rgba(12, 20, 35, 0.45);
}

.section-cta {
  margin-top: 1.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.site-header {
  position: fixed;
  top: 1rem;
  left: 0;
  right: 0;
  z-index: 40;
}

.nav-shell {
  position: relative;
  border-radius: 999px;
  padding: 0.7rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-family: "Syne", "Segoe UI", sans-serif;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 1.07rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a {
  font-size: 0.92rem;
  color: var(--muted);
  transition: color 0.25s ease;
}

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

.site-nav .nav-cta {
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  background: rgba(18, 32, 53, 0.5);
}

.menu-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(17, 27, 45, 0.7);
  padding: 0.35rem;
  gap: 0.27rem;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.menu-toggle span {
  width: 1rem;
  height: 2px;
  background: var(--text);
  border-radius: 10px;
}

main {
  padding-top: 5.6rem;
}

.hero {
  min-height: calc(100svh - 5.6rem);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-parallax {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.parallax-layer {
  position: absolute;
  border-radius: 50%;
  filter: blur(4px);
  opacity: 0.68;
  will-change: transform;
}

.layer-1 {
  width: 36rem;
  height: 36rem;
  top: -16rem;
  left: -9rem;
  background: radial-gradient(circle, rgba(74, 171, 255, 0.32), transparent 72%);
}

.layer-2 {
  width: 28rem;
  height: 28rem;
  top: 8rem;
  right: -8rem;
  background: radial-gradient(circle, rgba(92, 157, 255, 0.3), transparent 72%);
}

.layer-3 {
  width: 18rem;
  height: 18rem;
  bottom: -4rem;
  left: 42%;
  background: radial-gradient(circle, rgba(52, 125, 255, 0.26), transparent 72%);
}

.layer-4 {
  width: 13rem;
  height: 13rem;
  bottom: 22%;
  right: 24%;
  background: radial-gradient(circle, rgba(105, 200, 255, 0.2), transparent 72%);
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 2rem;
}

.hero-copy h1 {
  font-size: clamp(2.6rem, 7vw, 5.7rem);
  max-width: 12ch;
}

.hero-lead {
  margin-top: 1.2rem;
  max-width: 58ch;
  color: var(--muted);
}

.hero-actions {
  margin-top: 1.7rem;
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.hero-metrics {
  margin-top: 1.7rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.hero-metrics li {
  border: 1px solid var(--line);
  background: rgba(13, 23, 44, 0.5);
  border-radius: var(--radius-sm);
  padding: 0.8rem;
}

.metric-label {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  margin-bottom: 0.2rem;
}

.hero-metrics strong {
  font-size: 1.05rem;
}

.hero-visual {
  perspective: 1100px;
}

.gameplay-board {
  border-radius: var(--radius);
  padding: 1.5rem;
}

.board-label {
  color: var(--accent-soft);
  font-size: 0.82rem;
  margin-bottom: 0.65rem;
}

.gameplay-board h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.engine-list {
  display: grid;
  gap: 0.5rem;
}

.engine-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
}

.engine-item strong {
  color: var(--text);
}

.trajectory-track {
  position: relative;
  margin-top: 0.9rem;
  width: 100%;
  height: 0.6rem;
  border-radius: 999px;
  background: rgba(85, 121, 169, 0.24);
  overflow: hidden;
}

.trajectory-dot {
  position: absolute;
  top: 50%;
  left: -0.85rem;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  transform: translateY(-50%);
  background: radial-gradient(circle, #dcf5ff, #54beff 55%, #2e9fff);
  box-shadow: 0 0 16px rgba(82, 185, 255, 0.6);
  animation: trajectory-glide 2.6s linear infinite;
  animation-delay: var(--dot-delay, 0s);
}

.trajectory-track::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      90deg,
      rgba(70, 169, 255, 0.07),
      rgba(143, 227, 255, 0.46),
      rgba(70, 169, 255, 0.07)
    );
  transform: translateX(-100%);
  animation: track-sweep 2.6s linear infinite;
  animation-delay: var(--track-delay, 0s);
}

.data-pill-row {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.data-pill {
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.74rem;
  padding: 0.32rem 0.62rem;
  color: var(--muted);
  background: rgba(16, 28, 49, 0.6);
}

.board-note {
  margin-top: 0.9rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.solution-grid,
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.2rem;
  align-items: start;
}

.solution-list {
  margin-top: 1.2rem;
  display: grid;
  gap: 0.65rem;
}

.solution-list li {
  border-radius: var(--radius-sm);
  padding: 0.95rem;
}

.pillars-list h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.pillars-list p {
  color: var(--muted);
  font-size: 0.93rem;
}

.architecture {
  border-radius: var(--radius);
  padding: 1.3rem;
}

.architecture h3 {
  margin-bottom: 0.8rem;
}

.arch-node {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.62rem 0.75rem;
  margin-bottom: 0.55rem;
  color: var(--muted);
  background: rgba(15, 26, 47, 0.55);
}

.architecture p {
  margin-top: 0.7rem;
  color: var(--muted);
}

.experience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

.experience-cards {
  display: grid;
  gap: 0.85rem;
}

.sim-visual {
  margin-top: 1.25rem;
  border-radius: var(--radius);
  padding: 1rem;
  display: grid;
  gap: 0.75rem;
}

.sim-row {
  display: grid;
  gap: 0.45rem;
}

.sim-row span {
  font-size: 0.83rem;
  color: var(--muted);
}

.sim-track {
  position: relative;
  height: 0.45rem;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(81, 120, 171, 0.23);
}

.sim-dot {
  position: absolute;
  top: 50%;
  left: -0.6rem;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  transform: translateY(-50%);
  background: #93dfff;
  box-shadow: 0 0 12px rgba(98, 195, 255, 0.65);
  animation: trajectory-glide 2.1s linear infinite;
  animation-delay: var(--dot-delay, 0s);
}

.sim-track::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      90deg,
      rgba(51, 117, 230, 0),
      rgba(114, 197, 255, 0.38),
      rgba(51, 117, 230, 0)
    );
  transform: translateX(-100%);
  animation: track-sweep 2.1s linear infinite;
  animation-delay: var(--track-delay, 0s);
}

.exp-card {
  border-radius: var(--radius);
}

.vision-panel {
  border-radius: calc(var(--radius) + 4px);
  padding: clamp(1.7rem, 3.7vw, 2.8rem);
}

.vision-panel p {
  margin-top: 1rem;
  color: var(--muted);
  max-width: 62ch;
}

.about-panel {
  border-radius: var(--radius);
  padding: 1.35rem;
  display: grid;
  gap: 0.55rem;
}

.about-panel p {
  color: var(--muted);
  border-bottom: 1px dashed rgba(149, 192, 244, 0.22);
  padding-bottom: 0.45rem;
}

.signup-shell {
  border-radius: calc(var(--radius) + 6px);
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 1.4rem;
  padding: clamp(1.4rem, 4.5vw, 2.2rem);
}

.signup-form {
  display: grid;
  gap: 0.42rem;
}

.signup-form label {
  margin-top: 0.2rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.signup-form input {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(12, 20, 35, 0.66);
  color: var(--text);
  font: inherit;
  padding: 0.78rem 0.82rem;
}

.signup-form input:focus-visible {
  outline: 2px solid rgba(97, 179, 255, 0.5);
  outline-offset: 0;
}

.signup-form .btn {
  margin-top: 0.7rem;
}

.hidden {
  display: none;
}

.site-footer {
  padding: 2rem 0 2.8rem;
}

.footer-shell {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem 1rem;
  color: var(--muted);
  border-top: 1px solid rgba(156, 193, 255, 0.16);
  padding-top: 1.2rem;
}

.footer-shell a {
  color: var(--text);
}

.reveal {
  opacity: 0;
  transform: translateY(28px) scale(0.985);
  filter: blur(5px);
  transition:
    opacity 0.75s ease,
    transform 0.8s cubic-bezier(0.21, 0.77, 0.25, 1),
    filter 0.8s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}

.tilt-card {
  transform-style: preserve-3d;
  transition: transform 0.22s ease, box-shadow 0.25s ease;
}

.tilt-card > * {
  transform: translateZ(28px);
}

@keyframes trajectory-glide {
  0% {
    left: -0.85rem;
  }

  100% {
    left: calc(100% + 0.85rem);
  }
}

@keyframes track-sweep {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(100%);
  }
}

@media (max-width: 1080px) {
  .four-col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.6rem);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border-radius: 22px;
    padding: 0.85rem;
    background: rgba(13, 23, 42, 0.92);
    border: 1px solid var(--line);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav .nav-cta {
    text-align: center;
  }

  .hero-grid,
  .solution-grid,
  .experience-grid,
  .about-grid,
  .signup-shell {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .container {
    width: min(1120px, calc(100% - 2rem));
  }

  .three-col,
  .four-col {
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    max-width: 13ch;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
    filter: none;
  }
}