html, body {
    height: 100%; /* Ocupa toda la pantalla */
    margin: 0;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1; 
}

.main_index {
    background-image: url('../images/chess_hero2.jpg');
    background-size: contain;
    background-position: center;
    color: #fff;
    position: relative;
}

.main_index::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); /* Overlay for better text visibility */
}

.main_index .container {
    position: relative;
    z-index: 1;
}

.main_about {
    background-image: url('../images/about.jpg');
    background-size: cover;
    background-position: center;
    color: #fff;
    position: relative;
}
.main_about::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); /* Overlay for better text visibility */
}

.main_about .container {
    position: relative;
    z-index: 1;
}


#formLogin{
    padding: 15px; 
    min-width:300px;
}

#loading {
    display: none;
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    width: 100%;
    height: 100%;
    align-content: center;
    text-align: center;
    color: white;
}