:root {
  color-scheme: dark;
  --bg: #030711;
  --bg-soft: #07111f;
  --surface: rgba(9, 23, 42, 0.72);
  --surface-strong: rgba(12, 34, 62, 0.88);
  --text: #f3f8ff;
  --muted: #afc6df;
  --line: rgba(139, 195, 255, 0.24);
  --blue: #2aa8ff;
  --cyan: #7ce9ff;
  --white: #ffffff;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 70% 20%, rgba(16, 117, 255, 0.16), transparent 30rem),
    linear-gradient(180deg, #02040b 0%, var(--bg) 42%, #040a14 100%);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem clamp(1rem, 4vw, 3.5rem);
  border-bottom: 1px solid rgba(124, 233, 255, 0.16);
  background: rgba(3, 7, 17, 0.78);
  backdrop-filter: blur(18px);
}

.brand,
.site-header nav,
.hero-actions,
.docs-grid,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.65rem;
  font-weight: 700;
  text-decoration: none;
  font-size: 1.05rem;
}

.brand img,
.site-footer img {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
}

.site-header nav {
  justify-content: center;
  gap: clamp(0.7rem, 2vw, 1.55rem);
  color: var(--muted);
  font-size: 0.94rem;
}

.site-header nav a,
.site-footer a {
  text-decoration: none;
}

.site-header nav a:hover,
.site-footer a:hover {
  color: var(--cyan);
}

.header-download,
.button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0.78rem 1rem;
  border: 1px solid rgba(124, 233, 255, 0.28);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.94rem;
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    transform 160ms ease;
}

.header-download,
.button.primary {
  background: linear-gradient(135deg, #ffffff 0%, #a9eeff 52%, #2c9bff 100%);
  color: #031025;
  box-shadow: 0 16px 44px rgba(42, 168, 255, 0.24);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.055);
  color: var(--text);
}

.header-download:hover,
.button:hover {
  border-color: rgba(255, 255, 255, 0.72);
  transform: translateY(-1px);
}

.hero {
  position: relative;
  min-height: min(760px, calc(100vh - 1rem));
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: clamp(6rem, 10vw, 9rem) clamp(1rem, 5vw, 5rem) clamp(5rem, 8vw, 7rem);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 28%;
  background: linear-gradient(180deg, transparent, var(--bg));
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.82;
  filter: saturate(1.05) contrast(1.08);
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(4.8rem, 13vw, 12rem);
  line-height: 0.86;
  letter-spacing: 0;
  text-shadow: 0 18px 70px rgba(0, 0, 0, 0.86);
}

.hero p {
  max-width: 690px;
  margin: 1.6rem 0 0;
  color: #d9ecff;
  font-size: clamp(1.08rem, 2vw, 1.42rem);
  line-height: 1.55;
  text-shadow: 0 10px 38px #000;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.section {
  padding: clamp(4rem, 8vw, 7rem) clamp(1rem, 5vw, 5rem);
}

.section-heading {
  max-width: 850px;
  margin-bottom: 2rem;
}

.section-label {
  margin: 0 0 0.8rem;
  color: var(--cyan);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
}

h2 {
  margin: 0;
  font-size: clamp(2.1rem, 5vw, 4.6rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.25;
}

.section-heading p:not(.section-label),
article p,
.checksum-panel p,
.steps p,
.site-footer p {
  color: var(--muted);
  line-height: 1.65;
}

.download-grid,
.feature-list,
.architecture-map,
.safety-grid,
.docs-grid {
  display: grid;
  gap: 1rem;
}

.download-grid {
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
}

.download-panel,
.checksum-panel,
.feature-list article,
.architecture-map article,
.safety-grid article,
.steps li,
.docs-grid a {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.032));
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.download-panel,
.checksum-panel {
  border-radius: 8px;
  padding: clamp(1.25rem, 3vw, 2rem);
}

.primary-panel {
  background:
    linear-gradient(135deg, rgba(42, 168, 255, 0.16), rgba(255, 255, 255, 0.052)),
    var(--surface);
}

.download-panel .button {
  margin: 1rem 0;
}

code {
  color: #dff8ff;
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.hero-copy,
.section-heading,
.download-panel,
.checksum-panel,
.feature-list article,
.architecture-map article,
.safety-grid article,
.steps li,
.docs-grid a {
  min-width: 0;
}

.checksum-panel {
  margin-top: 1rem;
}

.checksum-panel dl {
  display: grid;
  gap: 1rem;
  margin: 1.1rem 0;
}

.checksum-panel dt {
  color: var(--white);
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.checksum-panel dd {
  margin: 0;
}

.feature-list,
.architecture-map {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-list article,
.architecture-map article,
.safety-grid article,
.docs-grid a {
  border-radius: 8px;
  padding: 1.35rem;
}

.setup-section {
  background:
    linear-gradient(90deg, rgba(7, 17, 31, 0.2), rgba(42, 168, 255, 0.08), rgba(7, 17, 31, 0.2));
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  border-radius: 8px;
  padding: 1.25rem;
}

.steps span {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-radius: 999px;
  background: rgba(124, 233, 255, 0.14);
  border: 1px solid rgba(124, 233, 255, 0.36);
  color: var(--cyan);
  font-weight: 800;
}

.architecture-map {
  position: relative;
}

.architecture-map article {
  min-height: 13rem;
  background: var(--surface-strong);
}

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

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

.docs-grid a {
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
}

.docs-grid a:hover {
  border-color: rgba(124, 233, 255, 0.64);
  color: var(--cyan);
}

.site-footer {
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 2rem clamp(1rem, 5vw, 5rem);
  border-top: 1px solid rgba(124, 233, 255, 0.16);
  background: rgba(2, 4, 11, 0.82);
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-header nav {
    order: 3;
    grid-column: 1 / -1;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .download-grid,
  .feature-list,
  .architecture-map,
  .steps,
  .safety-grid,
  .docs-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
  }

  .header-download {
    display: none;
  }

  .hero {
    min-height: 690px;
    align-items: flex-end;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .hero-copy,
  .hero p,
  .section-heading {
    max-width: min(calc(100vw - 2.5rem), 21.75rem);
  }

  .hero h1 {
    font-size: clamp(4rem, 22vw, 6.5rem);
  }

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

  .hero-actions .button {
    width: 100%;
  }

  h2 {
    font-size: clamp(2rem, 12vw, 3rem);
  }

  .download-grid,
  .feature-list,
  .architecture-map,
  .steps,
  .safety-grid,
  .docs-grid {
    grid-template-columns: 1fr;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
  }
}