:root {
  color-scheme: dark;
  --bg: #071426;
  --bg-deep: #04101f;
  --panel: rgba(12, 31, 54, 0.78);
  --line: rgba(158, 196, 224, 0.18);
  --text: #f5f8fb;
  --muted: #9db0c3;
  --cyan: #32d6d1;
  --green: #a8e62f;
  --pink: #ff2d8f;
  --blue: #24a8ff;
  --content: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 75% 5%, rgba(41, 167, 255, 0.15), transparent 28rem),
    radial-gradient(circle at 10% 35%, rgba(50, 214, 209, 0.08), transparent 24rem),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  color: var(--text);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.6;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  pointer-events: none;
  opacity: 0.16;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, #000, transparent 72%);
}

a {
  color: inherit;
}

.page-shell {
  width: min(100% - 40px, var(--content));
  margin: 0 auto;
}

.site-header {
  display: flex;
  min-height: 88px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 720;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(50, 214, 209, 0.55);
  border-radius: 10px;
  background: rgba(50, 214, 209, 0.1);
  color: var(--cyan);
  font-size: 14px;
}

.site-header nav {
  display: flex;
  gap: 28px;
}

.site-header nav a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  transition: color 180ms ease;
}

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

.hero {
  display: grid;
  min-height: 650px;
  align-items: center;
  gap: 70px;
  grid-template-columns: minmax(0, 1.02fr) minmax(420px, 0.98fr);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 700px;
  margin: 0;
  font-size: clamp(46px, 5.8vw, 78px);
  line-height: 1.1;
  letter-spacing: -0.055em;
}

.hero-intro {
  max-width: 620px;
  margin: 28px 0 32px;
  color: var(--muted);
  font-size: 18px;
}

.primary-action {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  gap: 42px;
  justify-content: space-between;
  border: 1px solid rgba(50, 214, 209, 0.5);
  border-radius: 14px;
  background: rgba(50, 214, 209, 0.12);
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  padding: 0 20px;
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease;
}

.primary-action:hover,
.primary-action:focus-visible {
  background: rgba(50, 214, 209, 0.2);
  transform: translateY(-2px);
}

.hero-visual {
  position: relative;
  min-height: 450px;
}

.orbit {
  position: absolute;
  border: 1px solid rgba(71, 184, 255, 0.24);
  border-radius: 50%;
}

.orbit-one {
  inset: 30px 34px 55px 60px;
}

.orbit-two {
  inset: 94px 100px 110px 124px;
}

.signal-card {
  position: absolute;
  display: flex;
  width: 270px;
  height: 325px;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  border-radius: 28px;
  padding: 26px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.34);
}

.signal-card::before {
  position: absolute;
  width: 250px;
  height: 250px;
  border: 1px solid currentColor;
  border-radius: 50%;
  content: "";
  opacity: 0.24;
  right: -100px;
  top: -80px;
}

.signal-card-green {
  left: 10px;
  top: 28px;
  border: 1px solid rgba(168, 230, 47, 0.6);
  background:
    linear-gradient(160deg, rgba(168, 230, 47, 0.23), transparent 45%),
    #0b2331;
  color: var(--green);
  transform: rotate(-8deg);
}

.signal-card-pink {
  right: 8px;
  bottom: 20px;
  border: 1px solid rgba(255, 45, 143, 0.65);
  background:
    linear-gradient(160deg, rgba(255, 45, 143, 0.22), transparent 45%),
    linear-gradient(340deg, rgba(36, 168, 255, 0.18), transparent 50%),
    #0c2038;
  color: var(--pink);
  transform: rotate(7deg);
}

.signal-card span {
  position: absolute;
  left: 24px;
  top: 22px;
  font-size: 12px;
  font-weight: 800;
}

.signal-card strong {
  color: var(--text);
  font-size: 34px;
  line-height: 1.1;
}

.signal-card small {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}

.product-section {
  padding: 90px 0 80px;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 36px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(34px, 4vw, 52px);
  letter-spacing: -0.045em;
  line-height: 1.1;
}

.section-heading > p {
  max-width: 380px;
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 14px;
}

.product-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.product-card {
  position: relative;
  display: flex;
  min-height: 440px;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--panel);
  color: var(--text);
  padding: 30px;
  text-decoration: none;
  transition: border-color 180ms ease, transform 180ms ease;
}

.product-card::after {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  content: "";
  filter: blur(1px);
  opacity: 0.15;
  right: -120px;
  top: -110px;
}

.product-giffgaff::after {
  background: var(--green);
}

.product-lebara::after {
  background: linear-gradient(135deg, var(--pink), var(--blue));
}

.product-card:hover,
.product-card:focus-visible {
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-5px);
}

.product-card-top,
.product-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-index {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.product-status {
  border: 1px solid rgba(168, 230, 47, 0.36);
  border-radius: 999px;
  background: rgba(168, 230, 47, 0.08);
  color: var(--green);
  font-size: 12px;
  padding: 5px 10px;
}

.product-status-new {
  border-color: rgba(255, 45, 143, 0.36);
  background: rgba(255, 45, 143, 0.08);
  color: #ff72b4;
}

.product-card-copy p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.product-card-copy h3 {
  margin: 0 0 14px;
  font-size: clamp(46px, 6vw, 70px);
  letter-spacing: -0.055em;
  line-height: 1;
}

.product-card-copy > span {
  color: var(--muted);
  font-size: 15px;
}

.product-link {
  border-top: 1px solid var(--line);
  font-size: 14px;
  font-weight: 700;
  padding-top: 20px;
}

.product-link span {
  font-size: 20px;
}

.principles {
  display: grid;
  gap: 18px;
  padding: 70px 0 110px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.principles article {
  border-top: 1px solid var(--line);
  padding: 24px 4px 0;
}

.principles article > span {
  color: var(--cyan);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.principles h3 {
  margin: 16px 0 10px;
  font-size: 20px;
}

.principles p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

footer {
  display: flex;
  min-height: 100px;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 900px) {
  .hero {
    min-height: auto;
    padding: 90px 0 40px;
    grid-template-columns: 1fr;
  }

  .hero-visual {
    width: min(100%, 560px);
    min-height: 420px;
    margin: 0 auto;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 28px, var(--content));
  }

  .site-header {
    min-height: 72px;
  }

  .site-header nav {
    gap: 16px;
  }

  .site-header nav a:first-child {
    display: none;
  }

  .hero {
    gap: 28px;
    padding-top: 64px;
  }

  .hero h1 {
    font-size: clamp(42px, 13vw, 62px);
  }

  .hero-intro {
    font-size: 16px;
  }

  .hero-visual {
    min-height: 330px;
  }

  .signal-card {
    width: 205px;
    height: 250px;
    border-radius: 22px;
    padding: 20px;
  }

  .signal-card-green {
    left: 4px;
  }

  .signal-card-pink {
    right: 4px;
  }

  .signal-card strong {
    font-size: 26px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .product-grid,
  .principles {
    grid-template-columns: 1fr;
  }

  .product-card {
    min-height: 360px;
    padding: 24px;
  }

  .principles {
    gap: 34px;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 24px 0;
  }
}

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

  * {
    transition: none !important;
  }
}