:root {
  --bg: #06101d;
  --bg-soft: #0c1728;
  --panel: rgba(17, 28, 45, 0.58);
  --panel-strong: rgba(20, 33, 52, 0.72);
  --line: rgba(177, 210, 255, 0.16);
  --line-strong: rgba(177, 210, 255, 0.28);
  --text: #eef5ff;
  --muted: #a8bad1;
  --accent: #79c5ff;
  --accent-strong: #3de0c1;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: Bahnschrift, "Segoe UI Variable Display", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 18%, rgba(61, 224, 193, 0.14), transparent 30%),
    radial-gradient(circle at 82% 12%, rgba(121, 197, 255, 0.18), transparent 24%),
    radial-gradient(circle at 50% 80%, rgba(39, 108, 255, 0.12), transparent 32%),
    var(--bg);
  background-image:
    radial-gradient(circle at 20% 18%, rgba(61, 224, 193, 0.14), transparent 30%),
    radial-gradient(circle at 82% 12%, rgba(121, 197, 255, 0.18), transparent 24%),
    radial-gradient(circle at 50% 80%, rgba(39, 108, 255, 0.12), transparent 32%),
    url("assets/bg.svg");
  background-attachment: fixed;
  background-size: auto, auto, auto, cover;
  line-height: 1.55;
}

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

img {
  display: block;
  max-width: 100%;
}

.site-shell {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
  padding-bottom: 32px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 18px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(6, 16, 29, 0.58);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand img {
  border-radius: 12px;
  object-fit: cover;
}

.nav-cta,
.button {
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    color 180ms ease;
}

.nav-cta {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.02);
}

.nav-cta:hover,
.nav-cta:focus-visible {
  transform: translateY(-1px);
  border-color: var(--line-strong);
  color: var(--text);
}

.section {
  padding: 56px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.9fr);
  gap: 28px;
  align-items: center;
  min-height: calc(100vh - 120px);
  padding-top: 42px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 11ch;
  margin-bottom: 16px;
  font-size: clamp(2.7rem, 7vw, 5.2rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.9rem, 3vw, 3rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.15rem;
}

.hero-text,
.section-heading + p,
.card p,
.step p,
.about p,
.hero-panel p {
  color: var(--muted);
}

.hero-text {
  max-width: 32rem;
  margin-bottom: 26px;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.button-primary {
  color: #041321;
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  box-shadow: 0 18px 38px rgba(61, 224, 193, 0.22);
}

.button-primary:hover,
.button-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 24px 48px rgba(61, 224, 193, 0.28);
}

.glass {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  backdrop-filter: blur(22px);
  box-shadow: var(--shadow);
}

.hero-panel {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border-radius: var(--radius-lg);
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: -30% auto auto -10%;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(121, 197, 255, 0.24), transparent 68%);
}

.hero-panel-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.hero-panel-grid article,
.card,
.step,
.about {
  border: 1px solid var(--line);
  background: var(--panel);
}

.hero-panel-grid article {
  padding: 18px;
  border-radius: var(--radius-md);
}

.metric {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--text);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.section-heading {
  max-width: 680px;
  margin-bottom: 28px;
}

.cards-grid,
.steps-grid {
  display: grid;
  gap: 18px;
}

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

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

.guide {
  padding: 32px;
  border-radius: var(--radius-lg);
}

.guide-heading {
  max-width: 760px;
}

.guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.82fr);
  gap: 20px;
  align-items: start;
}

.guide-main,
.guide-side {
  display: grid;
  gap: 16px;
}

.guide-step,
.platform-card,
.note-card {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.guide-step {
  padding: 22px;
  border-radius: var(--radius-md);
}

.guide-step-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.guide-step-head h3,
.note-card h3,
.platform-card h4 {
  margin-bottom: 0;
}

.inline-code {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 4px 10px;
  border: 1px solid rgba(121, 197, 255, 0.18);
  border-radius: 999px;
  background: rgba(121, 197, 255, 0.08);
  color: #dff4ff;
  font-family: Consolas, "SFMono-Regular", monospace;
  font-size: 0.95em;
}

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.platform-card {
  padding: 18px;
  border-radius: 18px;
}

.platform-card p,
.note-card p,
.note-list {
  color: var(--muted);
}

.note-card {
  padding: 22px;
  border-radius: var(--radius-md);
}

.note-card-warning {
  background:
    linear-gradient(180deg, rgba(255, 198, 112, 0.14), rgba(255, 255, 255, 0.03)),
    var(--panel);
}

.note-card-important {
  background:
    linear-gradient(180deg, rgba(255, 120, 120, 0.14), rgba(255, 255, 255, 0.03)),
    var(--panel);
}

.note-card-accent {
  background:
    linear-gradient(180deg, rgba(61, 224, 193, 0.14), rgba(255, 255, 255, 0.03)),
    var(--panel);
}

.note-list {
  margin: 14px 0 0;
  padding-left: 20px;
}

.note-list li + li {
  margin-top: 10px;
}

.card,
.step {
  padding: 22px;
  border-radius: var(--radius-md);
  transition:
    transform 200ms ease,
    border-color 200ms ease,
    background-color 200ms ease;
}

.card:hover,
.card:focus-within,
.step:hover,
.step:focus-within {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: var(--panel-strong);
}

.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 32px;
  margin-bottom: 14px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(121, 197, 255, 0.12);
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
}

.about {
  padding: 28px;
  border-radius: var(--radius-lg);
}

.footer {
  padding: 18px 0 8px;
  color: var(--muted);
  text-align: center;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

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

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

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

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

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 26px;
  }

  .guide-layout {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 640px) {
  .site-shell {
    width: min(calc(100% - 20px), var(--container));
  }

  .topbar {
    padding: 12px 14px;
  }

  .brand span {
    font-size: 0.88rem;
  }

  .nav-cta {
    padding: 9px 13px;
    font-size: 0.92rem;
  }

  .section {
    padding: 42px 0;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .guide {
    padding: 20px;
  }

  .hero-panel,
  .about,
  .card,
  .step {
    padding: 20px;
  }

  .hero-panel-grid,
  .cards-grid,
  .platforms-grid,
  .guide-layout {
    grid-template-columns: 1fr;
  }

  .guide-step-head {
    align-items: flex-start;
  }
}