:root {
  color-scheme: light;
  --ink: #0f253f;
  --muted: #5f7085;
  --line: #dbe7f5;
  --accent: #2f7df6;
  --accent-dark: #145cc4;
  --surface: #f4f8fd;
  --card: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 18% 8%, rgba(47, 125, 246, 0.14), transparent 32%),
    linear-gradient(135deg, #f7fbff 0%, #edf5ff 48%, #f9fbff 100%);
}

.page-shell {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 46px 0 54px;
  display: grid;
  gap: 28px;
}

.intro { text-align: center; }

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-dark);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 4vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.lead {
  margin: 14px auto 0;
  max-width: 620px;
  color: var(--muted);
  font-size: clamp(1rem, 1.8vw, 1.24rem);
}

.carousel {
  position: relative;
  display: grid;
  grid-template-columns: 76px minmax(260px, 430px) 76px;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 3vw, 34px);
}

.phone-stage {
  display: grid;
  place-items: center;
}

.phone-frame {
  position: relative;
  width: min(360px, 72vw);
  aspect-ratio: 430 / 880;
  filter: drop-shadow(0 28px 46px rgba(9, 31, 64, 0.22));
}

.phone-screen {
  position: absolute;
  z-index: 1;
  left: 7.45%;
  top: 4.85%;
  width: 85.1%;
  height: 90.25%;
  border-radius: 30px;
  overflow: hidden;
  background: #000;
}

.phone-screen img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transform: translateX(0) scale(1);
  opacity: 1;
  transition: opacity 180ms ease, transform 220ms ease;
  will-change: opacity, transform;
}

.phone-frame.is-leaving .phone-screen img,
.phone-frame.is-entering .phone-screen img {
  transform: translateX(var(--slide-offset, 18px)) scale(0.992);
  opacity: 0;
}

.phone-screen::after {
  content: "Replay";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #ffffff;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: radial-gradient(circle, rgba(15, 37, 63, 0.72), rgba(15, 37, 63, 0.16) 54%, transparent 72%);
  opacity: 0;
  pointer-events: none;
  transform: scale(0.96);
  transition: opacity 180ms ease, transform 260ms ease;
}

.phone-frame.is-restarting .phone-screen::after {
  opacity: 1;
  transform: scale(1);
  animation: replayPulse 760ms ease;
}

@keyframes replayPulse {
  0% { opacity: 0; transform: scale(0.92); }
  34% { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(1.035); }
}

.phone-shell {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.nav-button {
  width: 58px;
  height: 58px;
  border: 1px solid rgba(47, 125, 246, 0.24);
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: var(--accent-dark);
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 14px 26px rgba(15, 37, 63, 0.11);
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, color 160ms ease, background 160ms ease;
}

.nav-button span {
  font-size: 2.4rem;
  line-height: 1;
  transform: translateY(-2px);
}

.nav-button:hover,
.nav-button:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(47, 125, 246, 0.72);
  color: #ffffff;
  background: var(--accent);
  outline: none;
}

.demo-caption {
  width: min(620px, 100%);
  margin: 0 auto;
  padding: 24px 28px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 38px rgba(17, 45, 82, 0.08);
}

.demo-kicker {
  margin: 0 0 6px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.demo-caption h2 {
  margin: 0;
  font-size: clamp(1.45rem, 2.6vw, 2rem);
}

.demo-caption p:not(.demo-kicker) {
  margin: 10px auto 0;
  max-width: 520px;
  color: var(--muted);
  line-height: 1.6;
}

.dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
}

.dot {
  width: 10px;
  height: 10px;
  border: 0;
  border-radius: 999px;
  background: #b8c9df;
  cursor: pointer;
  transition: width 160ms ease, background 160ms ease;
}

.dot.is-active {
  width: 32px;
  background: var(--accent);
}

@media (prefers-reduced-motion: reduce) {
  .phone-screen img,
  .phone-screen::after,
  .nav-button,
  .dot {
    transition: none;
    animation: none;
  }
}

@media (max-width: 760px) {
  .page-shell { padding-top: 30px; }
  .carousel {
    grid-template-columns: 52px minmax(230px, 1fr) 52px;
    gap: 8px;
  }
  .nav-button { width: 46px; height: 46px; }
  .nav-button span { font-size: 2rem; }
  .phone-frame { width: min(320px, 76vw); }
  .demo-caption { padding: 20px; }
}