html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  background: #fff;
  color: #111;
  font-family: 'Segoe UI', Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
}
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
}
main {
  display: flex;
  flex-direction: column;
  align-items: left;
  max-width: 38rem;
  width: 100%;
  padding: 4rem 2rem 2rem 2rem;
  box-sizing: border-box;
  text-align: left;
  gap: 2.5rem;
}
.logo {
  width: 12.5rem;
  max-width: 80vw;
  height: auto;
  margin: 0 auto;
  display: block;
}
h1 {
  font-size: 2.5rem;
  margin: 0;
  font-weight: 700;
  letter-spacing: -1px;
  padding: 0;
}
h2 {
  font-size: 1.5rem;
  margin: 0;
  font-weight: 600;
  line-height: 1.3;
  padding: 0;
}
.text-block {
  font-size: 1.1rem;
  color: #222;
  margin: 0;
  width: 100%;
  max-width: 36rem;
}
@media (max-width: 900px) {
  main {
    max-width: 90vw;
    padding: 2rem 1.5rem 1.5rem 1.5rem;
    gap: 2rem;
  }
  .logo {
    width: 9rem;
    margin-top: 1rem;
  }
  h1 {
    font-size: 2rem;
  }
  h2 {
    font-size: 1.2rem;
  }
}
@media (max-width: 600px) {
  main {
    max-width: 98vw;
    padding: 1.5rem 0.5rem 0.5rem 0.5rem;
    gap: 1.5rem;
  }
  .logo {
    width: 7rem;
  }
  h1 {
    font-size: 1.3rem;
  }
  h2 {
    font-size: 1rem;
  }
  .text-block {
    font-size: 1rem;
  }
}