:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  background: #f4f6f8;
  color: #17222e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top right, rgba(38, 92, 110, 0.10), transparent 34rem),
    linear-gradient(180deg, #f8fafb 0%, #eef2f4 100%);
}

.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
}

.card {
  width: min(100%, 42rem);
  padding: clamp(2rem, 5vw, 4rem);
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid #dfe6ea;
  border-radius: 1.5rem;
  box-shadow: 0 1.25rem 4rem rgba(20, 38, 50, 0.10);
  text-align: center;
}

.mark {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1.5rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #173e4c;
  color: #ffffff;
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.eyebrow {
  margin: 0 0 0.9rem;
  color: #416572;
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.18em;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.35rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.message {
  max-width: 34rem;
  margin: 1.4rem auto 0;
  color: #4c5d68;
  font-size: 1.05rem;
  line-height: 1.75;
}

.rule {
  width: 4rem;
  height: 2px;
  margin: 2rem auto;
  background: #c8d4d9;
}

.note {
  margin: 0;
  color: #6b7880;
  font-size: 0.92rem;
}

@media (max-width: 36rem) {
  .shell {
    padding: 1rem;
  }

  .card {
    border-radius: 1.1rem;
    padding: 2rem 1.4rem;
  }
}