:root {
  --bg: #09111a;
  --bg-soft: #0f1823;
  --panel: rgba(18, 27, 39, 0.88);
  --panel-strong: #111c2a;
  --stroke: rgba(166, 196, 228, 0.16);
  --text: #f3f8ff;
  --muted: #a7b8cb;
  --blue: #4bb6ff;
  --cyan: #6ae0ff;
  --orange: #f8a940;
  --green: #7cd48a;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "IBM Plex Sans", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(75, 182, 255, 0.18), transparent 26%),
    radial-gradient(circle at top right, rgba(248, 169, 64, 0.14), transparent 20%),
    linear-gradient(180deg, #081019 0%, #0b131d 55%, #0d1622 100%);
}

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

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

.site-shell {
  width: min(1200px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 20px 0 40px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 0 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: clamp(1.6rem, 2.2vw, 2.2rem);
}

.brand-stack {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
}

.brand-tag {
  color: var(--blue);
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.topnav {
  display: inline-flex;
  gap: 16px;
  flex-wrap: wrap;
}

.topnav a {
  color: var(--muted);
  font-size: 0.95rem;
}

.topnav a:hover {
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 28px;
  align-items: center;
  padding: 22px 0 38px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1,
.section-head h2,
.setup-copy h2,
.footer-banner h2 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  line-height: 0.96;
  letter-spacing: -0.04em;
}

.hero h1 {
  max-width: 10ch;
  font-size: clamp(3rem, 5.4vw, 5.8rem);
}

.hero-text {
  max-width: 60ch;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 26px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  font-weight: 600;
}

.button-primary {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #07111d;
  border-color: transparent;
}

.button-ghost {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 26px 0 0;
  list-style: none;
}

.hero-points li,
.signal-card,
.setup-note,
.footer-banner {
  border: 1px solid var(--stroke);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero-points li {
  padding: 16px 14px;
  border-radius: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.hero-art-wrap {
  display: flex;
  justify-content: center;
}

.hero-art-panel {
  position: relative;
  width: min(100%, 530px);
  padding: 22px;
  border: 1px solid var(--stroke);
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01)),
    var(--panel-strong);
  box-shadow: var(--shadow);
}

.hero-art-panel::before {
  content: "";
  position: absolute;
  inset: 16px;
  border-radius: 22px;
  border: 1px solid rgba(255,255,255,0.06);
  pointer-events: none;
}

.hero-art {
  width: 100%;
  border-radius: 18px;
}

.signal-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 8px 0 58px;
}

.signal-card {
  border-radius: 22px;
  padding: 18px;
}

.signal-label {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--orange);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.signal-card p,
.phone-meta p,
.setup-note p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.screens-section {
  padding: 18px 0 62px;
}

.section-head {
  max-width: 760px;
  margin: 0 auto 28px;
  text-align: center;
}

.section-head h2,
.setup-copy h2,
.footer-banner h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.carousel-shell {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
}

.carousel-arrow {
  width: 52px;
  height: 52px;
  border: 1px solid var(--stroke);
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  color: var(--text);
  font-size: 1.8rem;
  cursor: pointer;
}

.carousel-stage {
  position: relative;
  min-height: 760px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.phone-card {
  position: absolute;
  inset: 0;
  margin: auto;
  width: min(100%, 360px);
  opacity: 0;
  transform: translateX(36px) scale(0.96);
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.phone-card.is-active {
  opacity: 1;
  transform: translateX(0) scale(1);
}

.phone-card img {
  width: 100%;
  border-radius: 34px;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.42);
}

.phone-meta {
  margin-top: 18px;
  text-align: center;
}

.phone-title {
  display: inline-block;
  margin-bottom: 10px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
}

.carousel-dots button {
  width: 10px;
  height: 10px;
  border: 0;
  border-radius: 999px;
  background: rgba(255,255,255,0.2);
  cursor: pointer;
}

.carousel-dots button.is-active {
  width: 30px;
  background: linear-gradient(135deg, var(--blue), var(--orange));
}

.setup-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
  align-items: start;
  padding: 12px 0 60px;
}

.steps {
  margin: 22px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.8;
}

.setup-note {
  border-radius: 28px;
  padding: 24px;
}

.setup-note h3 {
  margin: 0 0 12px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.5rem;
}

.footer-banner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  padding: 28px;
  border-radius: 30px;
  margin-bottom: 18px;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--cyan);
  font-weight: 600;
}

@media (max-width: 980px) {
  .hero,
  .setup-grid,
  .signal-band {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    max-width: none;
  }

  .hero-points {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(100vw - 20px, 1200px);
    padding-top: 14px;
  }

  .topbar,
  .footer-banner {
    flex-direction: column;
    align-items: flex-start;
  }

  .carousel-shell {
    grid-template-columns: 1fr;
  }

  .carousel-arrow {
    display: none;
  }

  .carousel-stage {
    min-height: 700px;
  }

  .phone-card {
    width: min(100%, 320px);
  }

  .section-head {
    text-align: left;
  }
}