* {
  box-sizing: border-box;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: #f5f5f7;
  color: #1d1d1f;
}

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

.card {
  width: min(560px, 100%);
  text-align: center;
  background: #ffffff;
  border: 1px solid #e5e5e7;
  border-radius: 24px;
  padding: 56px 32px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.06);
}

.logo-mark {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: #1d1d1f;
  color: #ffffff;
  font-size: 32px;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 8vw, 4rem);
  letter-spacing: -0.05em;
}

.tagline {
  margin: 18px auto 0;
  max-width: 420px;
  color: #6e6e73;
  font-size: 1.1rem;
  line-height: 1.6;
}

.divider {
  width: 48px;
  height: 1px;
  background: #d2d2d7;
  margin: 36px auto;
}

.support {
  margin: 0;
  color: #6e6e73;
  font-size: 0.98rem;
}

a {
  color: #0066cc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}