*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: #fff;
  color: #111;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

main {
  text-align: center;
  max-width: 480px;
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  color: #000;
  letter-spacing: -0.02em;
}

.date {
  margin-top: 0.75rem;
  font-size: 1.15rem;
  font-weight: 400;
  color: #444;
}

hr {
  border: none;
  border-top: 1px solid #1D4B38;
  width: 3rem;
  margin: 2rem auto;
}

.tagline {
  font-size: 1.05rem;
  color: #555;
}

.organizer {
  margin-top: 3rem;
  font-size: 0.9rem;
  color: #666;
}

.organizer a {
  color: #1D4B38;
  text-decoration: none;
}

.organizer a:hover {
  text-decoration: underline;
}

@media (max-width: 480px) {
  h1 {
    font-size: 2.25rem;
  }

  .date {
    font-size: 1rem;
  }
}