:root {
  color-scheme: dark;
  --page-bg: #070b12;
  --surface: rgba(17, 24, 39, 0.72);
  --surface-strong: rgba(24, 34, 52, 0.94);
  --surface-border: rgba(148, 163, 184, 0.16);
  --text: #f8fafc;
  --text-muted: #9aa8bc;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.14);
  --positive: #86efac;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
  --radius-small: 0.85rem;
  --radius-medium: 1.35rem;
  --radius-large: 2rem;
  --content-width: 76rem;
  --header-height: 4.5rem;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: var(--page-bg);
  color: var(--text);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 20rem;
  background: var(--page-bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% -8%, rgba(14, 165, 233, 0.17), transparent 30rem),
    radial-gradient(circle at 92% 16%, rgba(99, 102, 241, 0.14), transparent 28rem),
    linear-gradient(180deg, #080d16 0%, var(--page-bg) 48%, #050810 100%);
  color: var(--text);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.025) 1px, transparent 1px);
  background-size: 3.5rem 3.5rem;
  content: "";
  mask-image: linear-gradient(to bottom, black, transparent 76%);
  pointer-events: none;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

:focus-visible {
  outline: 0.18rem solid var(--accent);
  outline-offset: 0.22rem;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  transform: translateY(-160%);
  border-radius: 0.65rem;
  background: var(--text);
  color: var(--page-bg);
  padding: 0.7rem 1rem;
  font-weight: 700;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.app-shell {
  min-height: 100vh;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
  background: rgba(7, 11, 18, 0.72);
  padding: 0.8rem max(1.1rem, calc((100vw - var(--content-width)) / 2));
  backdrop-filter: blur(22px) saturate(130%);
}

.app-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.72rem;
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.app-brand-mark {
  display: grid;
  width: 2.15rem;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(125, 211, 252, 0.35);
  border-radius: 0.72rem;
  background: linear-gradient(145deg, rgba(56, 189, 248, 0.25), rgba(99, 102, 241, 0.12));
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.16);
  color: #dff6ff;
}

.app-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.app-nav a {
  min-height: 2.65rem;
  display: inline-flex;
  align-items: center;
  border-radius: 0.75rem;
  padding: 0 0.9rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 640;
  text-decoration: none;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.app-nav a:hover {
  background: rgba(148, 163, 184, 0.08);
  color: var(--text);
  transform: translateY(-1px);
}

.app-main {
  width: min(var(--content-width), calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 4.5rem) 0 4rem;
}

.app-footer {
  display: flex;
  width: min(var(--content-width), calc(100% - 2rem));
  margin: 0 auto;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  padding: 1.75rem 0 2.5rem;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.app-footer-dot {
  color: var(--accent-strong);
}

.page-stack {
  container-type: inline-size;
  display: grid;
  gap: clamp(1rem, 2vw, 1.6rem);
}

.surface-panel {
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-large);
  background: linear-gradient(145deg, rgba(24, 34, 52, 0.76), rgba(10, 16, 27, 0.74));
  box-shadow: var(--shadow), inset 0 1px rgba(255, 255, 255, 0.035);
  backdrop-filter: blur(18px);
}

.hero {
  container-type: inline-size;
  display: grid;
  min-height: clamp(30rem, 70vh, 44rem);
  overflow: hidden;
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  padding: clamp(2rem, 6vw, 5.75rem);
  isolation: isolate;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 43rem;
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--accent);
  font-size: 0.77rem;
  font-weight: 780;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

h1,
h2,
h3 {
  text-wrap: balance;
}

h1 {
  margin-bottom: 1.25rem;
  font-size: clamp(2.7rem, 8cqi, 5.8rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

h2 {
  margin-bottom: 0.85rem;
  font-size: clamp(1.8rem, 4vw, 3.15rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

h3 {
  margin-bottom: 0.55rem;
  font-size: 1.05rem;
  letter-spacing: -0.015em;
}

p {
  color: var(--text-muted);
  line-height: 1.68;
}

.hero-lead {
  max-width: 42rem;
  margin-bottom: 1.8rem;
  font-size: clamp(1rem, 2.25cqi, 1.22rem);
}

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

.button {
  display: inline-flex;
  min-height: 2.9rem;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 0.82rem;
  padding: 0.72rem 1rem;
  cursor: pointer;
  font-weight: 720;
  text-decoration: none;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease, border-color 150ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, #e0f2fe, #bae6fd);
  box-shadow: 0 12px 32px rgba(56, 189, 248, 0.18);
  color: #082f49;
}

.button-secondary {
  border-color: rgba(148, 163, 184, 0.18);
  background: rgba(148, 163, 184, 0.07);
  color: var(--text);
}

.hero-visual {
  position: relative;
  z-index: 1;
  width: min(100%, 31rem);
  aspect-ratio: 1;
  justify-self: center;
  perspective: 65rem;
  transform-style: preserve-3d;
}

.hero-visual::before {
  position: absolute;
  inset: 14%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.15), transparent 68%);
  filter: blur(1rem);
  content: "";
}

.hero-core,
.hero-orbit {
  position: absolute;
  inset: 50% auto auto 50%;
  transform-style: preserve-3d;
}

.hero-core {
  width: 8rem;
  aspect-ratio: 1;
  transform: translate(-50%, -50%) rotateX(58deg) rotateZ(35deg);
  border: 1px solid rgba(125, 211, 252, 0.38);
  border-radius: 1.9rem;
  background:
    linear-gradient(145deg, rgba(125, 211, 252, 0.22), rgba(99, 102, 241, 0.08)),
    rgba(10, 18, 31, 0.75);
  box-shadow:
    0 0 5rem rgba(56, 189, 248, 0.2),
    inset 0 1px rgba(255, 255, 255, 0.2);
  animation: core-float 6s ease-in-out infinite;
}

.hero-orbit {
  border: 1px solid rgba(125, 211, 252, 0.16);
  border-radius: 50%;
}

.hero-orbit::after {
  position: absolute;
  top: 50%;
  left: -0.3rem;
  width: 0.58rem;
  aspect-ratio: 1;
  transform: translateY(-50%);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 1.2rem rgba(125, 211, 252, 0.8);
  content: "";
}

.hero-orbit-one {
  width: 17rem;
  aspect-ratio: 1;
  transform: translate(-50%, -50%) rotateX(67deg) rotateY(-12deg);
  animation: orbit-one 11s linear infinite;
}

.hero-orbit-two {
  width: 24rem;
  aspect-ratio: 1;
  transform: translate(-50%, -50%) rotateX(72deg) rotateY(38deg);
  animation: orbit-two 16s linear infinite reverse;
}

.content-section,
.graphics-section {
  padding: clamp(2rem, 5vw, 4.5rem) 0;
}

.section-heading {
  max-width: 45rem;
  margin-bottom: 1.65rem;
}

.feature-grid {
  container-type: inline-size;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
}

.feature-card {
  min-height: 13rem;
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-medium);
  background: rgba(15, 23, 42, 0.52);
  padding: 1.25rem;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.feature-card:hover {
  transform: translateY(-0.25rem);
  border-color: rgba(125, 211, 252, 0.28);
  background: rgba(18, 29, 48, 0.72);
}

.feature-number {
  display: inline-block;
  margin-bottom: 2.3rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 760;
  letter-spacing: 0.1em;
}

.feature-card p {
  margin-bottom: 0;
  font-size: 0.92rem;
}

.runtime-details {
  margin-top: 0.85rem;
  padding: 1rem 1.2rem;
  border-radius: var(--radius-medium);
  color: var(--text-muted);
}

.runtime-details strong {
  color: var(--positive);
}

.adaptive-section {
  container-type: inline-size;
  display: grid;
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  padding: clamp(2rem, 5vw, 4rem);
}

.adaptive-copy p:last-child,
.graphics-copy p:last-child {
  margin-bottom: 0;
}

.adaptive-preview {
  display: grid;
  min-height: 18rem;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto 1fr 1fr;
  gap: 0.7rem;
  transform: perspective(48rem) rotateY(-7deg) rotateX(3deg);
  border: 1px solid rgba(125, 211, 252, 0.18);
  border-radius: 1.25rem;
  background: rgba(3, 8, 18, 0.58);
  padding: 1rem;
  box-shadow: 1.5rem 1.8rem 4rem rgba(0, 0, 0, 0.26);
}

.preview-bar {
  grid-column: 1 / -1;
  height: 1.6rem;
  border-radius: 0.5rem;
  background: rgba(148, 163, 184, 0.09);
}

.preview-card {
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: 0.8rem;
  background: rgba(148, 163, 184, 0.055);
}

.preview-card-primary {
  grid-row: span 2;
  background: linear-gradient(145deg, rgba(56, 189, 248, 0.16), rgba(99, 102, 241, 0.06));
}