:root {
  --color-bg: #0c1220;
  --color-surface: #141b2d;
  --color-surface-alt: rgba(255, 255, 255, 0.04);
  --color-primary: #ff6b35;
  --color-primary-soft: rgba(255, 107, 53, 0.18);
  --color-text: #f3f4f8;
  --color-text-muted: rgba(243, 244, 248, 0.72);
  --color-accent: #4ed0f9;
  --shadow-soft: 0 20px 40px -24px rgba(12, 18, 32, 0.8);
  --shadow-card: 0 30px 60px -40px rgba(0, 0, 0, 0.7);
  --max-width: 1100px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --transition: 200ms ease;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: 'Manrope', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 24px 160px;
  display: grid;
  gap: 48px;
  align-items: center;
  background: radial-gradient(circle at top left, rgba(78, 208, 249, 0.2), transparent 55%),
    radial-gradient(circle at bottom right, rgba(255, 107, 53, 0.22), transparent 60%),
    var(--color-bg);
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.05), transparent 40%);
  mix-blend-mode: screen;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 580px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 16px 0 12px;
  font-size: clamp(2.8rem, 5vw, 3.8rem);
  line-height: 1.05;
}

.hero__lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
}

.hero__actions {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
}

.button--primary {
  background: linear-gradient(120deg, #ff914d, var(--color-primary));
  color: #0a0f1a;
  box-shadow: 0 18px 30px -18px rgba(255, 145, 77, 0.9);
}

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

.button--ghost {
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-text);
  background: transparent;
}

.hero__illustration {
  position: relative;
  z-index: 1;
  justify-self: center;
}

.device {
  width: clamp(220px, 30vw, 320px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.05));
  display: grid;
  place-items: center;
  position: relative;
  box-shadow: var(--shadow-card);
}

.device__ring {
  width: 70%;
  height: 70%;
  border-radius: 50%;
  border: 12px solid rgba(255, 255, 255, 0.12);
  position: absolute;
  animation: pulse 4s infinite;
}

.device__core {
  width: 45%;
  height: 45%;
  border-radius: 32% 68% 70% 30% / 30% 40% 60% 70%;
  background: linear-gradient(150deg, var(--color-primary), rgba(78, 208, 249, 0.9));
  box-shadow: inset 0 10px 30px rgba(0, 0, 0, 0.4);
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.6;
  }
}

.top-nav {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(12, 18, 32, 0.7);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-nav__inner {
  margin: 0 auto;
  max-width: var(--max-width);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
}

.top-nav__brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.top-nav__links {
  display: flex;
  gap: 18px;
}

.top-nav__links a {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  padding: 8px 10px;
  border-radius: 8px;
  transition: background var(--transition);
}

.top-nav__links a:hover,
.top-nav__links a:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
}

.top-nav__toggle {
  display: none;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  padding: 8px 12px;
  border-radius: 8px;
  font-weight: 600;
}

main {
  padding: 40px 24px 120px;
}

.section {
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 60px 0;
}

.section--tint {
  background: linear-gradient(180deg, rgba(20, 27, 45, 0.4), rgba(20, 27, 45, 0));
  padding-inline: 24px;
  border-radius: var(--radius-lg);
}

.section--outline {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding-inline: 32px;
}

.section__header {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 32px;
}

.section__header h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin: 0;
}

.section__header p {
  margin: 0;
  color: var(--color-text-muted);
}

.grid {
  display: grid;
  gap: 24px;
}

.grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.card,
.persona,
.feature,
.story {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.04);
  transition: transform var(--transition), border-color var(--transition);
}

.card:hover,
.persona:hover,
.feature:hover,
.story:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.12);
}

.card--minimal {
  background: var(--color-surface-alt);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.persona h3,
.card h3,
.story h3 {
  margin-top: 0;
  margin-bottom: 12px;
}

.persona p,
.card p,
.story p {
  margin: 0;
  color: var(--color-text-muted);
}

.features {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.feature h3 {
  margin-top: 16px;
  margin-bottom: 12px;
}

.feature p {
  margin: 0;
  color: var(--color-text-muted);
}

.feature__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.feature__id {
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.feature__tag {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
}

.feature__tag--p1 {
  background: rgba(78, 208, 249, 0.16);
  color: #8ce6ff;
}

.feature__tag--p2 {
  background: rgba(255, 107, 53, 0.18);
  color: #ffbb9f;
}

.feature__tag--p3 {
  background: rgba(179, 121, 255, 0.22);
  color: #d2b9ff;
}

.metrics {
  text-align: center;
}

.metric {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  border: 1px solid rgba(255, 255, 255, 0.04);
  box-shadow: var(--shadow-soft);
}

.metric h3 {
  margin: 0 0 8px;
  font-size: 2rem;
  color: var(--color-primary);
}

.metric p {
  margin: 0;
  color: var(--color-text-muted);
}

.stories {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.checklist {
  margin: 0;
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.checklist li {
  position: relative;
  padding-left: 28px;
  color: var(--color-text-muted);
}

.checklist li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-primary);
}

.checklist--bullet li::before {
  content: '•';
  font-size: 1.4rem;
  color: var(--color-accent);
  line-height: 1;
}

.footer {
  margin-top: 80px;
  padding: 40px 24px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

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

@media (max-width: 880px) {
  .hero {
    padding: 100px 24px 120px;
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__content {
    justify-self: center;
  }

  .hero__actions {
    justify-content: center;
  }
}

@media (max-width: 720px) {
  .top-nav__toggle {
    display: inline-flex;
  }

  .top-nav__links {
    position: absolute;
    top: 60px;
    right: 20px;
    background: rgba(12, 18, 32, 0.94);
    flex-direction: column;
    padding: 16px;
    border-radius: var(--radius-md);
    min-width: 180px;
    box-shadow: var(--shadow-soft);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity var(--transition), transform var(--transition);
  }

  .top-nav__links a {
    padding: 10px 12px;
  }

  .top-nav__links.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
}

@media (max-width: 600px) {
  main {
    padding-inline: 20px;
  }

  .section {
    padding: 48px 0;
  }

  .section--outline {
    padding-inline: 24px;
  }
}