:root {
  color-scheme: dark light;
  --background: #000000;
  --foreground: #ffffff;
  --accent: #00bfff;
  --guide: #ff6a00;
  --panel: #151515;
  --panel-strong: #202020;
  --border: #333333;
  --muted: #b8b8b8;
  --accent-contrast: #000000;
  --accent-soft: rgba(0, 191, 255, 0.18);
  --guide-soft: rgba(255, 106, 0, 0.2);
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--background);
  color: var(--foreground);
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
}

a {
  color: inherit;
}

code {
  padding: 0.1rem 0.25rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--panel);
  font-size: 0.92em;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--background) 88%, transparent);
  backdrop-filter: blur(14px);
}

.nav {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 1rem;
  width: min(1160px, calc(100% - 2rem));
  margin: 0 auto;
  min-height: 64px;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0;
}

.brand-icon {
  display: block;
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
}

.brand-version {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 1rem;
}

.nav-links a,
.text-link {
  color: var(--muted);
  text-decoration-color: var(--accent);
  text-underline-offset: 0.24em;
}

.nav-links a {
  font-size: 0.92rem;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding: 0.35rem 0 0.28rem;
}

.nav-links a:hover,
.text-link:hover {
  color: var(--foreground);
}

.nav-links a.current,
.nav-links a[aria-current="true"] {
  color: var(--foreground);
  border-bottom-color: var(--accent);
}

.section-picker,
.theme-picker {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.section-picker {
  display: none;
}

select {
  max-width: 12rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--panel);
  color: var(--foreground);
  padding: 0.38rem 0.5rem;
}

.section {
  width: min(1160px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 5rem 0;
  scroll-margin-top: 76px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(320px, 1.14fr);
  align-items: center;
  gap: 2rem;
  min-height: calc(100vh - 64px);
  padding-top: 2rem;
  padding-bottom: 3rem;
}

.hero-copy {
  max-width: 38rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 5.7rem);
  line-height: 0.94;
}

h2 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.02;
}

h3 {
  margin: 0 0 0.65rem;
  font-size: 1.05rem;
}

p {
  color: var(--muted);
  line-height: 1.6;
}

.lead {
  margin: 1.2rem 0 1.5rem;
  font-size: 1.12rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.65rem 1rem;
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-contrast);
}

.button.secondary {
  background: var(--panel);
  color: var(--foreground);
}

.button.wide {
  width: 100%;
}

.first-use {
  margin: 1.5rem 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.hero-image,
.guide-sheet {
  margin: 0;
}

.hero-image img,
.guide-sheet img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.5fr);
  gap: 2rem;
  align-items: start;
  border-top: 1px solid var(--border);
}

.download-panel,
.link-stack {
  display: grid;
  gap: 0.9rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
}

.small {
  margin: 0.25rem 0 0;
  font-size: 0.9rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.feature-grid article {
  min-height: 10rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
}

.feature-grid h3 {
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border);
}

.feature-grid p {
  margin-bottom: 0;
}

.hardware-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.hardware-list div {
  display: grid;
  grid-template-columns: 10rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--border);
}

.hardware-list strong {
  color: var(--foreground);
}

.hardware-list span {
  color: var(--muted);
  line-height: 1.55;
}

.note {
  border-left: 3px solid var(--guide);
  padding-left: 1rem;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
}

.guide-sheet {
  margin-top: 1.5rem;
}

.footer {
  display: flex;
  justify-content: center;
  gap: 1rem;
  width: min(1160px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

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

@media (max-width: 700px) {
  .nav {
    grid-template-columns: auto minmax(0, 1fr) auto;
    min-height: 56px;
    gap: 0.5rem;
  }

  .nav-links {
    display: none;
  }

  .section-picker {
    display: flex;
    justify-content: end;
  }

  .section-picker select,
  .theme-picker select {
    max-width: 7.7rem;
  }

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

  .hero {
    min-height: 0;
  }

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

@media (max-width: 620px) {
  .section {
    width: min(100% - 1rem, 1160px);
    padding: 3.5rem 0;
  }

  .nav {
    width: min(100% - 1rem, 1160px);
  }

  .section-picker span,
  .theme-picker span {
    display: none;
  }

  select {
    max-width: 7rem;
  }

  .feature-grid,
  .hardware-list div {
    grid-template-columns: 1fr;
  }

  .feature-grid article {
    min-height: 0;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}