:root {
  color-scheme: dark;
  --page-bg: #08121d;
  --surface: #0d1826;
  --surface-strong: #101f31;
  --text: #f7fbff;
  --muted: #9fb3c9;
  --line: rgba(148, 177, 209, 0.15);
  --accent: #2f79ff;
  --accent-soft: #3fd8ff;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  --radius-xl: 2rem;
  --radius-lg: 1.5rem;
  --radius-md: 1rem;
  --shell: min(1180px, calc(100vw - 2rem));
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: "Plus Jakarta Sans", sans-serif;
  background: var(--page-bg);
  color: var(--text);
  text-wrap: pretty;
}

img {
  display: block;
  max-width: 100%;
}

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

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.hero {
  position: relative;
}

.hero__bar {
  position: absolute;
  inset: 1.125rem 0 auto;
  z-index: 3;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  pointer-events: none;
}

.brand,
.store-badges {
  pointer-events: auto;
}

.brand img {
  width: clamp(5.75rem, 10vw, 7.75rem);
  filter: drop-shadow(0 10px 28px rgba(0, 0, 0, 0.4));
}

.store-badges {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.6rem;
}

.store-badges a {
  display: inline-flex;
  border-radius: 0.9rem;
  transition:
    transform 220ms ease,
    filter 220ms ease;
}

.store-badges a:hover,
.store-badges a:focus-visible {
  transform: translateY(-2px);
  filter: brightness(1.05);
}

.store-badges img {
  width: clamp(9rem, 16vw, 11.5rem);
}

.hero__visual {
  position: relative;
  background: #050c15;
}

.hero__visual::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 12rem;
  background: linear-gradient(180deg, rgba(8, 18, 29, 0) 0%, var(--page-bg) 100%);
}

.hero__visual img {
  width: 100%;
  height: auto;
}

.intro {
  padding: 1rem 0 2rem;
  text-align: center;
}

.intro__eyebrow {
  margin: 0;
  font-size: clamp(1.4rem, 2.2vw, 2.15rem);
  line-height: 1.35;
  font-weight: 800;
  color: var(--accent-soft);
}

.feature {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(18rem, 0.9fr);
  align-items: center;
  gap: clamp(1.75rem, 4vw, 5rem);
  padding: clamp(2rem, 6vw, 4.75rem) 0;
}

.feature--reverse .feature__media {
  order: 2;
}

.feature--reverse .feature__copy {
  order: 1;
}

.feature__copy h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.85rem, 3vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.feature__copy p {
  margin: 0;
  max-width: 40rem;
  font-size: clamp(1rem, 1.45vw, 1.12rem);
  line-height: 1.8;
  color: var(--muted);
}

.feature__media {
  min-width: 0;
}

.phone-pair {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  gap: clamp(0.9rem, 2vw, 1.8rem);
}

.phone-crop {
  margin: 0;
  width: clamp(8.7rem, calc(50% - 0.9rem), 15rem);
  aspect-ratio: 9 / 18.4;
  overflow: hidden;
  border-radius: 0.35rem;
  background: #fff;
  box-shadow: var(--shadow);
}

.phone-crop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: var(--focus, 50%) center;
}

.poster-card {
  display: block;
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  transition:
    transform 220ms ease,
    box-shadow 220ms ease;
}

.poster-card:hover,
.poster-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.32);
}

.feature__copy--education {
  display: grid;
  gap: 1.4rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  font-weight: 700;
  transition:
    transform 220ms ease,
    border-color 220ms ease,
    background-color 220ms ease;
}

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

.button--primary {
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
}

.button--ghost {
  color: var(--text);
  border: 1px solid rgba(63, 216, 255, 0.28);
  background: rgba(15, 30, 47, 0.75);
}

.footer {
  padding: 2.2rem 0 4rem;
  text-align: center;
}

.footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer a:hover,
.footer a:focus-visible {
  color: var(--text);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 500ms ease,
    transform 500ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

  .reveal,
  .reveal.is-visible,
  .store-badges a,
  .poster-card,
  .button {
    transition: none;
    transform: none;
  }
}

@media (max-width: 900px) {
  .feature,
  .feature--reverse {
    grid-template-columns: 1fr;
  }

  .feature--reverse .feature__media,
  .feature--reverse .feature__copy {
    order: initial;
  }

  .feature__copy {
    text-align: left;
  }
}

@media (max-width: 680px) {
  .hero__bar {
    inset: 0.85rem 0 auto;
    align-items: center;
  }

  .brand img {
    width: 5.35rem;
  }

  .store-badges img {
    width: 7.8rem;
  }

  .hero__visual::after {
    height: 6.5rem;
  }

  .intro {
    padding-top: 0.4rem;
  }

  .phone-crop {
    width: min(10rem, calc(50vw - 1.55rem));
  }

  .phone-pair {
    flex-wrap: wrap;
  }

  .cta-row {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}