body, html {
  margin: 0;
  padding: 0;
  min-height: 100vh; /* Permite que el cuerpo crezca dinámicamente */
  font-family: sans-serif;
  overflow-y: auto; /* Activa el scroll vertical solo cuando sea necesario */
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
}

.background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transition: background 2s ease-in-out;
  z-index: -1;
}

.login-container {
  background: rgba(255, 255, 255, 0.5);
  border-radius: 8%;
  padding: 40px 30px;
  width: 400px;
  box-sizing: border-box;
  text-align: center;
  z-index: 10;
  
  /* CAMBIO MAESTRO: Centrado elástico inteligente con protección de márgenes */
  margin: auto auto !important;
  margin-top: 60px !important;    /* Espacio garantizado arriba */
  margin-bottom: 60px !important; /* Espacio garantizado abajo antes del footer */
  flex-shrink: 0 !important;      /* Impide que nada lo aplaste o deforme */
}
    
    .logo-container {
      width: 100%;
      height: 80px;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }
    
    .logo-container img {
      max-height: 60px; /* Reducido para que se ajuste al bloque */
      max-width: 90%;
      animation: slideIn 2s;
    }
    
    @keyframes slideIn {
      0% { transform: translateY(-100%); opacity: 0; }
      50% { opacity: 1; }
      100% { transform: translateY(0); opacity: 1; }
    }
    
    h2 {
      margin: 0 0 20px 0;
      font-size: 24px;
      transition: color 1s;
    }
    
    .input-container {
      position: relative;
      margin-bottom: 20px;
      text-align: left;
    }
    
    .input-container input,
    .input-container input[type="text"],
    .input-container input[type="email"],
    .input-container input[type="password"] {
      width: 100%;
      border: none;
      border-bottom: 1px solid rgba(0,0,0,0.5);
      background: transparent;
      padding: 10px 5px;
      color: rgba(0,0,0,0.5);
      font-size: 16px;
      box-sizing: border-box;
    }
    
    .input-container i {
      position: absolute;
      right: 10px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 18px;
      transition: color 1s;
    }
    
    #login-button {
      width: 100%;
      background-color: #31b2ff; /* Inicial */
      color: white;
      font-weight: bold;
      text-transform: uppercase;
      border: none;
      border-radius: 25px;
      padding: 12px 0;
      font-size: 16px;
      cursor: pointer;
      transition: background-color 1s;
    }
    
    .links {
      margin-top: 20px;
      display: flex;
      justify-content: space-between;
    }
    
    .links a {
      color: #31b2ff; /* Inicial */
      text-decoration: underline;
      font-size: 14px;
      transition: color 1s;
    }
    .checkbox-container {
      display: flex;
      align-items: center;
      justify-content: flex-start;
      font-size: 14px;
      margin-bottom: 20px;
    }
    .checkbox-container input[type="checkbox"] {
      margin-right: 8px;
      transform: scale(1.2);
    }
    .checkbox-container a {
      color: #31b2ff;
      text-decoration: underline;
      transition: color 1s;
    }
    #register-button {
      width: 100%;
      background-color: #31b2ff;
      color: white;
      font-weight: bold;
      text-transform: uppercase;
      border: none;
      border-radius: 25px;
      padding: 12px 0;
      font-size: 16px;
      cursor: pointer;
      transition: background-color 1s;
    }
    @media (max-width: 480px) {
  .login-container {
    width: 90%; /* Le da el ancho perfecto dejando un 5% de margen natural a cada lado */
    margin: 0; /* ¡Quitamos el margen problemático que lo empujaba! */
    padding: 30px 20px; /* Un poco menos de relleno interno para que respiren los inputs */
  }
}

    /* Estilos para el botón de Google */
    .social-separator {
      display: flex;
      align-items: center;
      text-align: center;
      margin: 25px 0 15px 0;
      color: rgba(0,0,0,0.4);
      font-size: 13px;
    }
    .social-separator::before, .social-separator::after {
      content: '';
      flex: 1;
      border-bottom: 1px solid rgba(0,0,0,0.2);
    }
    .social-separator:not(:empty)::before { margin-right: .5em; }
    .social-separator:not(:empty)::after { margin-left: .5em; }

    .btn-google {
      width: 100%;
      background-color: white;
      color: #555;
      font-weight: bold;
      border: 1px solid #ccc;
      border-radius: 25px;
      padding: 10px 0;
      font-size: 15px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      transition: background-color 0.3s, box-shadow 0.3s;
      box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    }
    .btn-google:hover {
      background-color: #f9f9f9;
      box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    }