:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #edf3f6;
  color: #172a3a;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  background:
    radial-gradient(circle at top, rgb(255 255 255 / 90%), transparent 38rem),
    #edf3f6;
}

.card {
  width: min(100%, 34rem);
  padding: clamp(2rem, 7vw, 3.5rem);
  text-align: center;
  background: #fff;
  border: 1px solid #dbe5ea;
  border-radius: 1.25rem;
  box-shadow: 0 1rem 3rem rgb(25 50 74 / 10%);
}

.mark {
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 1.25rem;
  border-radius: 0.9rem;
  background: #19324a;
  color: #fff;
  font-size: 1.75rem;
  font-weight: 800;
}

h1 {
  margin: 0;
  color: #19324a;
  font-size: clamp(2.25rem, 9vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.tagline {
  margin: 1rem auto 2rem;
  color: #476070;
  font-size: 1.15rem;
  line-height: 1.55;
}

.instructions {
  margin: 0 0 1.5rem;
  padding: 1rem 1.15rem;
  text-align: left;
  background: #f2f7f9;
  border-left: 0.25rem solid #2f7189;
  border-radius: 0.5rem;
}

.instructions h2 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
}

.instructions p {
  margin: 0;
  color: #3d5666;
  line-height: 1.5;
}

.button {
  display: block;
  width: 100%;
  padding: 0.95rem 1.25rem;
  border-radius: 0.65rem;
  background: #176b52;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 750;
  line-height: 1.3;
  text-decoration: none;
  box-shadow: 0 0.25rem 0.75rem rgb(23 107 82 / 20%);
}

.button:hover {
  background: #11543f;
}

.button:focus-visible {
  outline: 0.2rem solid #e0a526;
  outline-offset: 0.2rem;
}

.help {
  margin: 1.25rem 0 0;
  color: #607481;
  font-size: 0.9rem;
  line-height: 1.55;
}

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