* {
  padding: none;
  margin: none;
}

  /* Fondo general y tipografía */
  body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: radial-gradient(circle at center, #f8f4ff, #e3d6ff);
    color: #1a1a1a;
    text-align: center;
    
  }

  /* Header */
  header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background: transparent;
    font-weight: bold;
  }

  header div:first-child {
    font-size: 1.5rem;
    color: #5b2edd;
  }

  .nav-links {
    background-color: white;
    padding: 10px;
    border-radius: 50px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); /* sombra suave */
    display: flex;
    gap: 1rem; /* espacio entre los <a> */
  }

  header a {
    margin: 0 0.75rem;
    text-decoration: none;
    color: #333;
    font-weight: 500;
  }

  header button {
    margin-left: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    border: none;
    font-weight: 600;
    cursor: pointer;
  }

  header button:first-of-type {
    background-color: white;
    border: 1px solid #ccc;
    color: #555;
  }

  header button:last-of-type {
    background-color: #5b2edd;
    color: white;
  }

  /* Texto principal */
  strong {
    display: block;
    font-size: 2.5rem;
    margin: 2rem 0 1rem;
  }

  p {
    font-size: 1rem;
    color: #555;
    max-width: 600px;
    margin: 0 auto 1rem;
  }

  /* Botón principal */
  div > button {
    margin-top: 1rem;
    background-color: #5b2edd;
    color: white;
    padding: 0.7rem 2rem;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    cursor: pointer;
  }

  /* Texto de "years of reliability" */
  div > div {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
  }

  div > div p {
    margin: 0;
    font-size: 0.9rem;
    color: #888;
  }

  /* Scroll hint */
  body > p:last-of-type {
    margin-top: 2rem;
    font-size: 0.85rem;
    color: #aaa;
    letter-spacing: 1px;
  }

.circle-background {
  position: fixed;
  top: none;
  left: none;
  width: 100vw;
  height: 100vh; 
  z-index: -1; /* para que esté detrás de todo */
  pointer-events: none; /* no interfiere con el contenido */
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.circle {
  position: absolute;
  background: radial-gradient(circle, rgb(255, 255, 255), transparent);
  border-radius: 50%;
  pointer-events: none;
  backdrop-filter: blur(2px);
}