header {
    white-space: nowrap;
    width: 100%; 
    position: sticky;
    position: fixed;
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: white;
    height: 70px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    top: 0; 

}

header {
   /*Logo del header(menu)*/
   .logo-link {
    display: inline-block;
    background: none;
    border: none;
    text-decoration: none;
}

/* Evita cualquier efecto hover */
.logo-link:hover {
    background: none;
    filter: none;
}
    .logo {
        height: 100px;
        display: flex;
        align-items: center;
        position: relative; 
        left: -200px;
    }
  /* dimension del logo*/
    .logo img {
        width: 150px;
        margin-bottom: 5px;
    }
   
    /* DIseño de los botones del menu*/
    nav ul {
        margin-left: -220px;
        list-style: none;
        display: flex;
        font-family: Arial, sans-serif;
    }

    nav ul li {
        margin: 0 10px;
    }

    nav a {
        font-size: 18px;
        text-decoration: none;
        color: #424141;
        font-weight: bold;
        font-family: Arial, sans-serif;
    }

    .login {
        font-size: 15px;
        height: 100px;
        display: flex;
        align-items: center;
        position: relative; 
        left: 230px;   
    }

    .login a {
        font-size: 17px;
        text-decoration: none;
        color: #424141;
        font-family: Arial, sans-serif;
        display: flex;
        align-items: center;
    }

    .login img {
        width: 40px;
        margin-right: 5px;
    }

    a {
        display: inline-block;
        padding: 10px 20px;
        font-size: 20px;
        text-decoration: none;
        color: white;
        background-color: white;
        border-radius: 5px;
        border: 2px solid transparent; 
        cursor: pointer;
        transition: background-color 1s ease, border-color 0.3s ease;
    }

    a:hover {
        background-color: rgba(0, 156, 163, 0.7); 
        border-color: white;
        color: white;
    }
}