:root {
  color-scheme: light;
  --ink: #09090b;
  --soft: rgba(9, 9, 11, 0.58);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }

body {
  color: var(--ink);
  font-family: Inter, Arial, Helvetica, sans-serif;
  background: #c9d8f0;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: -18%;
  z-index: -2;
  background:
    radial-gradient(circle at 16% 28%, rgba(238, 246, 255, 0.98) 0 16%, transparent 42%),
    radial-gradient(circle at 82% 34%, rgba(105, 119, 237, 0.78) 0 15%, transparent 40%),
    radial-gradient(circle at 56% 78%, rgba(190, 204, 252, 0.95) 0 18%, transparent 45%),
    linear-gradient(135deg, #dbe8f6, #adc2e7 48%, #c8cff0);
  filter: blur(26px);
  transform: scale(1.08);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: saturate(112%);
}

a { color: inherit; }

nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  height: 72px;
  display: flex;
  align-items: center;
  gap: 34px;
  padding: 0 28px;
  background: rgba(228, 236, 250, 0.58);
  backdrop-filter: blur(22px);
  border-bottom: 1px solid rgba(9, 9, 11, 0.06);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
  font-size: 0.86rem;
  font-weight: 760;
  letter-spacing: 0.18em;
  text-decoration: none;
}

.brand img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  filter: brightness(0.15);
}

.nav-link {
  color: rgba(9, 9, 11, 0.72);
  font-size: 0.84rem;
  font-weight: 600;
  text-decoration: none;
}

.nav-link:hover { color: #09090b; }

.nav-cta {
  padding: 10px 18px;
  border-radius: 999px;
  background: #09090b;
  color: white;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 700;
}

main {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 130px 24px 90px;
  text-align: center;
}

.hero { width: min(900px, 100%); }

.mark {
  width: 82px;
  height: 68px;
  object-fit: contain;
  filter: brightness(0.12);
  margin-bottom: 16px;
}

h1 {
  margin: 0;
  font-size: clamp(5rem, 15vw, 11.5rem);
  font-weight: 660;
  letter-spacing: 0.16em;
  line-height: 0.8;
  text-indent: 0.16em;
}

.tagline {
  margin: 34px auto 0;
  font-size: clamp(0.95rem, 2vw, 1.12rem);
  font-weight: 580;
}

.detail {
  margin: 11px auto 0;
  color: var(--soft);
  font-size: 0.88rem;
  line-height: 1.55;
}

.actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.button {
  min-width: 162px;
  padding: 13px 20px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 700;
  transition: transform 0.15s ease, background 0.15s ease;
}

.button:hover { transform: translateY(-1px); }

.primary {
  background: #09090b;
  color: white;
  box-shadow: 0 12px 30px rgba(9, 9, 11, 0.15);
}

.secondary {
  background: rgba(255, 255, 255, 0.24);
  border: 1px solid rgba(9, 9, 11, 0.08);
  backdrop-filter: blur(12px);
}

.note {
  margin: 18px 0 0;
  color: rgba(9, 9, 11, 0.46);
  font-size: 0.72rem;
}

footer {
  position: fixed;
  inset: auto 0 0;
  display: flex;
  justify-content: space-between;
  padding: 18px 28px;
  color: rgba(9, 9, 11, 0.42);
  font-size: 0.7rem;
}

footer a { text-decoration: none; }

@media (max-width: 720px) {
  nav { height: 66px; padding: 0 18px; gap: 18px; }
  .nav-link { display: none; }
  .nav-cta { padding: 9px 15px; }
  main { padding-inline: 18px; }
  .mark { width: 68px; }
  h1 {
    font-size: clamp(4rem, 20vw, 7rem);
    letter-spacing: 0.08em;
    text-indent: 0.08em;
  }
  footer { position: absolute; padding: 16px 18px; }
}