:root {
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  background: #020817;
  color: #e9f6ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 72% 8%, rgba(30, 167, 255, .2), transparent 32rem),
    radial-gradient(circle at 12% 86%, rgba(55, 225, 255, .12), transparent 26rem),
    #020817;
}

main {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
  padding: 64px 0 80px;
}

.eyebrow {
  color: #5ee7ff;
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .18em;
  text-transform: uppercase;
}

h1 { margin: 10px 0 12px; font-size: clamp(2.2rem, 8vw, 4.4rem); }
h2 { margin-top: 38px; color: #8feeff; }
p, li { line-height: 1.85; color: #c8dcea; }
a { color: #66e2ff; }

.card {
  margin-top: 28px;
  padding: 24px;
  border: 1px solid rgba(98, 226, 255, .35);
  border-radius: 18px;
  background: rgba(5, 20, 42, .78);
  box-shadow: 0 18px 60px rgba(0, 0, 0, .28);
}

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 10px;
  background: #11a8d3;
  color: #00131e;
  font-weight: 800;
  text-decoration: none;
}

.muted { color: #88a4b8; font-size: .9rem; }
footer { margin-top: 56px; padding-top: 22px; border-top: 1px solid rgba(150, 220, 255, .15); }