:root {
  --bg-0: #04040b;
  --bg-1: #0b1022;
  --bg-2: #16264d;
  --ink: #f4f5f9;
  --muted: #afb5c7;
  --line: rgba(255, 255, 255, 0.16);
  --panel: rgba(13, 18, 35, 0.78);
  --panel-strong: rgba(7, 11, 26, 0.9);
  --brand: #6ce9c7;
  --brand-2: #f9c748;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 14% 18%, rgba(108, 233, 199, 0.15), transparent 34%),
    radial-gradient(circle at 86% 12%, rgba(249, 199, 72, 0.15), transparent 30%),
    radial-gradient(circle at 55% 90%, rgba(99, 134, 252, 0.28), transparent 40%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 42%, #030308 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, black 42%, transparent 100%);
}

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

h1,
h2,
h3,
h4,
p,
ul {
  margin: 0;
}

ul {
  padding-left: 1.15rem;
}

.site-shell {
  width: min(1160px, calc(100% - 2.4rem));
  margin: 0 auto;
}

.bg-orb {
  position: fixed;
  z-index: -1;
  width: 34vw;
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(36px);
  opacity: 0.2;
}

.bg-orb-a {
  top: -12vw;
  right: -8vw;
  background: linear-gradient(180deg, var(--brand), transparent 72%);
}

.bg-orb-b {
  bottom: -15vw;
  left: -8vw;
  background: linear-gradient(180deg, var(--brand-2), transparent 72%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 25;
  padding-top: 0.8rem;
}

.nav-wrap {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  justify-content: space-between;
  min-height: 64px;
  padding: 0.5rem 1rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(5, 9, 21, 0.76);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(145deg, var(--brand), #5ba3ff);
  color: #031118;
  font-family: "Archivo Black", "Arial Black", sans-serif;
}

.brand-word {
  letter-spacing: 0.08em;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a {
  transition: color 180ms ease;
}

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

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 46px;
  padding: 0 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-weight: 600;
  transition:
    transform 220ms ease,
    box-shadow 220ms ease,
    border-color 220ms ease,
    background 220ms ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.34);
}

.btn-primary {
  color: #06131a;
  border-color: transparent;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}

.btn-secondary,
.btn-nav {
  background: rgba(255, 255, 255, 0.05);
}

.btn-nav {
  min-height: 40px;
  font-size: 0.9rem;
}

.hero {
  padding: 5.3rem 0 2.2rem;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  gap: 2rem;
}

.hero-copy {
  display: grid;
  gap: 1.25rem;
  align-content: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--brand-2);
}

h1,
h2,
.brand-word,
.footer-brand {
  font-family: "Archivo Black", "Arial Black", sans-serif;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(2.45rem, 6.9vw, 5.9rem);
  line-height: 0.95;
  max-width: 11ch;
}

.lead,
.subtle,
.card p,
.step-card p,
.tile p,
.chat-panel p,
.topic p,
.panel p,
.env-card p,
.footer-note,
.cta-final p,
li {
  color: var(--muted);
  line-height: 1.65;
}

.chip-row,
.cta-row,
.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.chip-row span,
.stats li {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 999px;
  padding: 0.55rem 0.85rem;
  list-style: none;
  font-size: 0.92rem;
}

.stats {
  padding: 0;
}

.stats li {
  display: inline-flex;
  gap: 0.45rem;
  align-items: baseline;
}

.stats strong {
  color: var(--ink);
}

.hero-media {
  display: grid;
  gap: 1rem;
  align-content: center;
}

.video-frame {
  position: relative;
  border-radius: 1.25rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow: var(--shadow);
  background: #04070f;
}

video {
  width: 100%;
  min-height: 320px;
  max-height: 500px;
  object-fit: cover;
  display: block;
}

.video-note {
  position: absolute;
  left: 0.9rem;
  bottom: 0.9rem;
  max-width: 76%;
  padding: 0.65rem 0.8rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(3, 9, 20, 0.78);
  backdrop-filter: blur(8px);
}

.video-note p {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--brand-2);
}

.video-note strong {
  font-size: 0.95rem;
}

.media-panel {
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1rem;
  background: var(--panel);
}

.media-panel p {
  color: var(--ink);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.media-panel ul {
  display: grid;
  gap: 0.3rem;
}

.band {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 1.2rem;
  overflow: hidden;
}

.band-track {
  display: flex;
  gap: 1.3rem;
  padding: 0.9rem 0;
  color: #d8dff1;
  font-size: 0.86rem;
  white-space: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

.band-track::-webkit-scrollbar {
  display: none;
}

.band-track span::before {
  content: "●";
  color: var(--brand);
  margin-right: 0.6rem;
}

.section {
  padding: 5rem 0 0.8rem;
}

.section-head {
  display: grid;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: clamp(1.7rem, 3.6vw, 3rem);
  line-height: 1.05;
  max-width: 19ch;
}

.core-grid,
.steps,
.knowledge-grid,
.topic-grid,
.env-grid,
.vision-grid {
  display: grid;
  gap: 1rem;
}

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

.card,
.step-card,
.tile,
.topic,
.panel,
.env-card,
.chat-panel,
.question-list,
.pricing-card,
.roadmap article {
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--panel);
}

.card,
.step-card,
.tile,
.topic,
.panel,
.env-card,
.chat-panel,
.pricing-card,
.roadmap article {
  padding: 1rem;
}

.card h3,
.step-card h3,
.tile h3,
.topic h3,
.panel h3,
.env-card h3,
.chat-panel h3,
.roadmap h3 {
  font-size: 1.06rem;
  margin-bottom: 0.5rem;
}

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

.step-no {
  display: inline-flex;
  margin-bottom: 0.7rem;
  padding: 0.3rem 0.58rem;
  border-radius: 999px;
  background: rgba(108, 233, 199, 0.14);
  color: var(--brand);
  border: 1px solid rgba(108, 233, 199, 0.45);
  font-size: 0.8rem;
}

.step-card ul,
.panel ul {
  display: grid;
  gap: 0.22rem;
  margin-top: 0.72rem;
}

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

.tile.wide {
  grid-column: span 2;
  background: var(--panel-strong);
}

.demo-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 1rem;
}

.question-list {
  padding: 0.7rem;
  display: grid;
  gap: 0.55rem;
}

.question-btn {
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
  border-radius: 0.8rem;
  padding: 0.8rem;
  font: inherit;
  cursor: pointer;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.question-btn:hover {
  transform: translateX(2px);
  border-color: rgba(108, 233, 199, 0.6);
}

.question-btn.is-active {
  background: rgba(108, 233, 199, 0.13);
  border-color: rgba(108, 233, 199, 0.7);
}

.chat-label,
.topic p,
.env-card p:first-child,
.roadmap p {
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-size: 0.7rem;
  color: var(--brand-2);
}

.chat-footnote {
  margin-top: 0.9rem;
  font-size: 0.84rem;
}

.topic-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.filter-btn {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  border-radius: 999px;
  min-height: 38px;
  padding: 0 0.85rem;
  font: inherit;
  cursor: pointer;
}

.filter-btn.is-active {
  color: #06131a;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  border-color: transparent;
  font-weight: 700;
}

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

.topic {
  transition:
    transform 220ms ease,
    border-color 220ms ease,
    opacity 220ms ease;
}

.topic:hover {
  transform: translateY(-2px);
  border-color: rgba(108, 233, 199, 0.5);
}

.topic.is-hidden {
  opacity: 0.22;
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.price {
  font-family: "Archivo Black", "Arial Black", sans-serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 0.95;
  color: #f7f9ff;
  margin: 0.75rem 0;
}

.price span {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 1rem;
  color: var(--muted);
}

.pricing-card {
  background: linear-gradient(145deg, rgba(108, 233, 199, 0.15), rgba(249, 199, 72, 0.13));
}

.env-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.roadmap {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
  margin-top: 1rem;
}

.cta-final {
  text-align: center;
  padding-bottom: 3rem;
}

.cta-final p {
  max-width: 72ch;
  margin: 0 auto 1rem;
}

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 1.2rem 0 2rem;
}

.footer-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.footer-brand {
  font-size: 1.05rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.5s ease,
    transform 0.5s ease;
}

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

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .core-grid,
  .steps,
  .knowledge-grid,
  .topic-grid,
  .env-grid,
  .roadmap {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tile.wide {
    grid-column: auto;
  }

  .split,
  .demo-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-shell {
    width: calc(100% - 1.4rem);
  }

  .site-header {
    position: static;
    padding-top: 0.65rem;
  }

  .nav-wrap {
    flex-wrap: wrap;
    justify-content: center;
    padding: 0.7rem;
  }

  .nav-links {
    justify-content: center;
  }

  .hero {
    padding-top: 2.2rem;
  }

  h1 {
    font-size: clamp(2rem, 12vw, 3.3rem);
  }

  h2 {
    font-size: clamp(1.5rem, 8vw, 2rem);
  }

  .core-grid,
  .steps,
  .knowledge-grid,
  .topic-grid,
  .env-grid,
  .vision-grid,
  .roadmap {
    grid-template-columns: 1fr;
  }

  .section {
    padding-top: 3.6rem;
  }

  .chip-row span,
  .stats li {
    width: 100%;
  }
}