* {
    padding: 0;
    margin: 0;
    color: white;
    scroll-behavior: smooth;
}


body {
    background-image: linear-gradient(rgba(5, 7, 12, 0.75), rgba(5, 7, 12, 0.75)), url(portafolio_files/cubo.jpg);
    background-repeat: no-repeat;
    background-position: center;
    background-attachment: fixed;
    background-size: cover;
    font-family: 'Calibri', sans-serif;
}


#logo {
    position: absolute;
    top: 3ch;
    left: 30px;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    image-rendering: optimizeQuality;
}

header {
    background: linear-gradient(rgba(80, 123, 235, 0.75), rgba(88, 47, 235, 0.75));
    height: 150px;
    /* Tamaño fijo del header */
    display: flex;
    justify-content: center;
    align-items: center;
}

.menu {
    max-width: 1000px;
    width: 100%;
    display: flex;
    justify-content: flex-end;
}

nav ul li {
    list-style: none;
    margin-left: 40px;
    padding: 10% 0;
    float: left;
}

nav ul li a {
    font-weight: bold;
    font-size: x-large;
    font-family: Arial, Helvetica, sans-serif;
}

nav ul li a:hover {
    color: rgb(78, 158, 223);
    font-weight: bold;
    transition: color 0.5s;
    font-size: xx-large;
    text-decoration: underline;
}

#sobre_mi p {
    text-align: center;
    font-size: 25px;
}

#contacto a {
    font-size: 25px;
}

a:hover{
    font-weight: bold;
    transition: color 0.5s;
    font-size: 30px;
    text-decoration: underline;
}

.titulo {
    text-decoration: underline;
    font-size: x-large;
    margin: 20px;
}

table {
    width: 100%;
    margin-bottom: 20px;
}

th,
td {
    border: 5px solid #fffefe73;
    padding: 10px;
    border-radius: 15px;
}

th {
    background-color: #3036ac;
}

textarea,
input[type="text"],
select {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    background-color: black;

}

input[type="submit"] {
    padding: 10px 20px;
    background-color: #333;
    color: #fff;
    border: none;
    cursor: pointer;
}

input[type="submit"]:hover {
    background-color: #555;
}

.formulario {
    opacity: 70%;
    background-color: #3036ac;
}