:root {
  --bg-0: #060b14;
  --bg-1: #0a1220;
  --fg: #eaf3ff;
  --muted: #9eb0ce;
  --line: rgba(160, 189, 238, 0.28);
  --accent: #84b7ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  background: #060b14;
}

body {
  position: relative;
  overflow: hidden;
  min-height: 100dvh;
  color: var(--fg);
  font-family: "Segoe UI", "Yu Gothic UI", "Meiryo", sans-serif;
  padding:
    calc(env(safe-area-inset-top, 0px) + 1rem)
    calc(env(safe-area-inset-right, 0px) + 1rem)
    calc(env(safe-area-inset-bottom, 0px) + 1rem)
    calc(env(safe-area-inset-left, 0px) + 1rem);
  background:
    radial-gradient(900px 560px at 8% 12%, rgba(89, 144, 234, 0.2), transparent 60%),
    radial-gradient(1000px 620px at 90% 88%, rgba(88, 151, 255, 0.16), transparent 64%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1));
}

body::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(150, 180, 230, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(150, 180, 230, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at 50% 46%, #000 35%, transparent 85%);
  pointer-events: none;
}

.page {
  position: relative;
  height: 100%;
  padding: 0;
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 1rem;
  max-width: 900px;
  margin: 0 auto;
}

.label {
  margin: 0;
  color: var(--accent);
  letter-spacing: 0.12em;
  font-size: 0.76rem;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.7rem, 5.4vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  max-width: 18ch;
}

.rule {
  width: min(520px, 92vw);
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.96rem, 1.9vw, 1.06rem);
  line-height: 1.9;
  max-width: 64ch;
}