:root {
  --bg-dark: #0a0e1a;
  --bg-dark-alt: #11172a;
  --bg-light: #ffffff;
  --bg-light-alt: #f6f7f9;
  --fg-on-dark: #ffffff;
  --fg-on-dark-muted: #9ca3af;
  --fg: #0f172a;
  --fg-muted: #525c6b;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --border: #e5e7eb;
  --border-dark: rgba(255, 255, 255, 0.08);
  --container: 1180px;
  --radius: 8px;
  --section-pad: clamp(4rem, 8vw, 6rem);
  --container-pad: clamp(1.25rem, 5vw, 2rem);
  --header-height: 64px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 12px);
}

body {
  margin: 0;
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  color: var(--fg);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0.5rem;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  text-decoration: none;
  z-index: 100;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 0.5rem;
}

/* HEADER */
.site-header {
  position: sticky;
  top: 0;
  background: var(--bg-dark);
  color: var(--fg-on-dark);
  z-index: 50;
  border-bottom: 1px solid var(--border-dark);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.7rem;
  padding-bottom: 0.7rem;
  gap: 1rem;
  position: relative;
}
.brand {
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.04em;
  font-size: 1.1rem;
}
.brand-mark {
  color: var(--fg-on-dark);
}
.brand-accent {
  color: #efa9a9;
}

.primary-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.75rem;
  align-items: center;
}
.primary-nav a {
  color: var(--fg-on-dark);
  text-decoration: none;
  font-size: 1rem;
  opacity: 0.85;
  transition: opacity 0.15s ease;
}
.primary-nav a:hover,
.primary-nav a:focus-visible {
  opacity: 1;
}
.primary-nav .nav-cta {
  background: var(--accent);
  color: #fff;
  padding: 0.55rem 1rem;
  border-radius: var(--radius);
  opacity: 1;
  font-weight: 600;
}
.primary-nav .nav-cta:hover,
.primary-nav .nav-cta:focus-visible {
  background: var(--accent-hover);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  width: 44px;
  height: 44px;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--fg-on-dark);
  margin: 5px 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

@media (max-width: 800px) {
  .nav-toggle {
    display: block;
  }
  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    border-top: 1px solid var(--border-dark);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.18s ease, opacity 0.18s ease;
  }
  .primary-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .primary-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 0;
  }
  .primary-nav a {
    display: block;
    padding: 0.85rem var(--container-pad);
    font-size: 1rem;
  }
  .primary-nav .nav-cta {
    margin: 0.6rem var(--container-pad);
    text-align: center;
  }
}

/* HERO */
.hero {
  background: var(--bg-dark);
  color: var(--fg-on-dark);
  padding-top: var(--section-pad);
  padding-bottom: var(--section-pad);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(59, 130, 246, 0.12), transparent 60%),
    radial-gradient(ellipse at 0% 80%, rgba(59, 130, 246, 0.06), transparent 50%);
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
}
.hero-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  color: var(--accent);
  margin: 0 0 1.5rem;
  font-weight: 600;
}
.hero-logo {
  display: block;
  width: clamp(388px, 79%, 678px);
  height: auto;
  margin: 0 0 2.5rem;
}
.hero-headline {
  font-size: clamp(2.25rem, 6.4vw, 4.25rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 1.5rem;
  font-weight: 800;
}
.hero-headline .accent {
  color: var(--accent);
}
.hero-sub {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: var(--fg-on-dark-muted);
  max-width: 540px;
  margin: 0 0 1.25rem;
  line-height: 1.55;
}
.hero-availability {
  font-size: 0.95rem;
  margin: 0 0 2rem;
  color: var(--fg-on-dark-muted);
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-visual {
  perspective: 1400px;
  position: relative;
}
.hero-screen {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
  transform: rotateY(-8deg) rotateX(2deg);
  filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.55));
  animation: hero-crossfade 8s ease-in-out infinite;
}
.hero-screen-b {
  position: absolute;
  inset: 0;
  animation-delay: -4s;
}
@keyframes hero-crossfade {
  0%, 40% { opacity: 1; }
  50%, 90% { opacity: 0; }
  100% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-screen { animation: none; }
  .hero-screen-b { display: none; }
}

@media (min-width: 900px) {
  .hero-inner {
    grid-template-columns: 1.05fr 1fr;
    gap: 4rem;
  }
}

/* BUTTONS */
.btn {
  display: inline-block;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.97rem;
  border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--accent-hover);
}
.btn-secondary {
  background: transparent;
  color: var(--fg-on-dark);
  border-color: rgba(255, 255, 255, 0.25);
}
.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: rgba(255, 255, 255, 0.65);
}
.btn-outline {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.btn-outline:hover,
.btn-outline:focus-visible {
  border-color: var(--fg);
}

/* SECTIONS */
section {
  padding-top: var(--section-pad);
  padding-bottom: var(--section-pad);
}
.alt-bg {
  background: var(--bg-light-alt);
}
.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  letter-spacing: -0.015em;
  margin: 0 0 0.75rem;
  font-weight: 800;
  line-height: 1.15;
}
.section-lede {
  font-size: 1.05rem;
  color: var(--fg-muted);
  margin: 0 0 2.5rem;
  max-width: 60ch;
  line-height: 1.6;
}

/* PLATFORMS */
.platforms {
  background: var(--bg-light);
}
.platform-grid {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}
.platform {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.platform:hover {
  border-color: #cbd5e1;
}
.platform-brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.05rem;
}
.platform-detail {
  color: var(--fg-muted);
  font-size: 0.9rem;
}
.platform-note {
  margin-top: 2rem;
  font-size: 0.95rem;
  color: var(--fg-muted);
  max-width: 70ch;
}
.platform-legacy {
  margin-top: 1.5rem;
  padding: 1.1rem 1.4rem;
  background: var(--bg-light-alt);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
  align-items: baseline;
}
.platform-legacy-label {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--fg-muted);
}
.platform-legacy-list {
  color: var(--fg-muted);
  font-size: 0.95rem;
}

/* TWO-COL */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 800px) {
  .two-col {
    grid-template-columns: 1fr 1.3fr;
    gap: 4rem;
  }
}

.bullet-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.bullet-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  font-size: 1.05rem;
  line-height: 1.55;
}
.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

/* CARDS */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover {
  border-color: #cbd5e1;
}
.card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}
.card p {
  margin: 0 0 1.25rem;
  color: var(--fg-muted);
}
.tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.tag-list li {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--bg-light-alt);
  border: 1px solid var(--border);
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  color: var(--fg-muted);
  font-weight: 600;
}

/* TECHNOLOGIES (DARK) */
.technologies {
  background: var(--bg-dark);
  color: var(--fg-on-dark);
}
.technologies .section-title {
  color: #fff;
}
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}
.tech-group {
  background: var(--bg-dark-alt);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.tech-group h3 {
  margin: 0 0 0.6rem;
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}
.tech-group p {
  margin: 0;
  color: #d1d5db;
  font-size: 0.97rem;
  line-height: 1.55;
}

/* CONTACT */
.contact {
  background: var(--bg-light);
}
.contact-inner {
  max-width: 720px;
  text-align: center;
}
.contact .section-title,
.contact .section-lede {
  margin-left: auto;
  margin-right: auto;
}
.contact p {
  max-width: 60ch;
  margin-left: auto;
  margin-right: auto;
}
.muted {
  color: var(--fg-muted);
}
.small {
  font-size: 0.9rem;
}
.contact-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin: 2rem 0 1.25rem;
  flex-wrap: wrap;
}
.contact-email {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: var(--fg-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* FOOTER */
.site-footer {
  background: var(--bg-dark);
  color: var(--fg-on-dark-muted);
  padding: 2.5rem 0;
  font-size: 0.9rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  text-align: center;
}
.footer-brand {
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.04em;
}
@media (min-width: 800px) {
  .footer-inner {
    grid-template-columns: 1fr 2fr 1fr;
    text-align: left;
    align-items: center;
  }
  .footer-tagline {
    text-align: center;
  }
  .footer-copy {
    text-align: right;
  }
}

/* FOCUS */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}