:root {
  color-scheme: dark;
  --ink: #080d1f;
  --card: rgba(16, 25, 55, 0.75);
  --line: rgba(201, 220, 255, 0.16);
  --text: #f2f4ff;
  --muted: #aab7d5;
  --aqua: #73e3e0;
  --violet: #9a8dff;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  min-height: 100vh;
  margin: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 17% 17%, rgba(115, 227, 224, 0.18), transparent 26rem),
    radial-gradient(circle at 86% 78%, rgba(154, 141, 255, 0.2), transparent 29rem),
    var(--ink);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body::before,
body::after {
  position: fixed;
  z-index: -1;
  width: 30rem;
  height: 30rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  content: "";
}

body::before { top: -14rem; right: -10rem; }
body::after { bottom: -18rem; left: -12rem; }

main {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 1.5rem;
}

.card {
  width: min(100%, 34rem);
  padding: clamp(2.5rem, 8vw, 5rem);
  border: 1px solid var(--line);
  border-radius: 2rem;
  background: var(--card);
  box-shadow: 0 2rem 7rem rgba(0, 0, 0, 0.35);
  text-align: center;
  backdrop-filter: blur(18px);
}

.domain {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.motif {
  position: relative;
  width: 5rem;
  height: 5rem;
  margin: 2.75rem auto;
  border: 1px solid rgba(115, 227, 224, 0.52);
  border-radius: 50%;
  box-shadow: 0 0 3rem rgba(115, 227, 224, 0.2);
}

.motif span,
.motif i {
  position: absolute;
  display: block;
  width: 0.95rem;
  height: 0.95rem;
  border-radius: 50%;
  content: "";
}

.motif span {
  top: 0.55rem;
  right: 0.55rem;
  background: var(--aqua);
  box-shadow: 0 0 1.25rem var(--aqua);
}

.motif i {
  bottom: 0.65rem;
  left: 0.65rem;
  background: var(--violet);
  box-shadow: 0 0 1.25rem var(--violet);
}

h1 {
  margin: 0;
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  font-size: clamp(2.35rem, 8vw, 4.2rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1;
}

.message {
  margin: 1.2rem 0 0;
  color: var(--muted);
  font-size: 1rem;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}