* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: #f5f6f8;
  color: #20242a;
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(680px, 100%);
  text-align: center;
  padding: 72px 32px;
}

.mark {
  width: 72px;
  height: 72px;
  margin: 0 auto 28px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: #20242a;
  color: white;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0;
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.04em;
  font-weight: 700;
}

.tagline {
  margin: 22px 0 0;
  font-size: 1.15rem;
  line-height: 1.6;
  color: #666d76;
}

@media (prefers-color-scheme: dark) {
  body {
    background: #17191c;
    color: #f1f3f5;
  }

  .mark {
    background: #f1f3f5;
    color: #17191c;
  }

  .tagline {
    color: #aeb4bc;
  }
}