html{
    background:
    linear-gradient(rgba(0,0,0,.4),rgba(0,0,0,.4)),
    url("unnamed.jpg") no-repeat center;
    background-size: cover;
}

header{
    background: #f2f2f2;
    padding: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo{
    width: 200px;
}

body{
    background:none;
}

/* Contenedor principal */
#advanced-search-form{
    background:#fff;
    max-width:850px;
    margin:120px auto;
    padding:45px;
    color:#555;
    border-radius:14px;
    box-shadow:0 10px 25px rgba(0,0,0,.25);
}

/* Título */
#advanced-search-form h2{
    padding-bottom:15px;
    margin:10px 0 25px;
    font-size:28px;
    font-weight:600;
    color:#2c3e50;
    text-align:center;
}

/* Separador */
#advanced-search-form hr{
    margin:30px 0 40px;
    border:1px solid #ddd;
}

/* Grilla */
#advanced-search-form .form-group{
    margin-bottom:20px;
    padding:0 10px;
    width:33.3%;
    float:left;
}

/* Inputs */
#advanced-search-form .form-control{
    padding:12px 15px;
    border-radius:8px;
    border:1px solid #ddd;
    transition:.2s;
}

/* Focus institucional */
#advanced-search-form .form-control:focus{
    border-color:#56212f;
    box-shadow:0 0 0 2px rgba(86,33,47,.2);
}

/* Select (corregido para texto largo) */
#advanced-search-form select.form-control{
    height:auto;
    min-height:45px;
    line-height:1.4;
    padding:10px 12px;
    white-space:normal;
}

/* Opciones del select */
#advanced-search-form select.form-control option{
    white-space:normal;
    padding:8px;
}

/* Radios */
#advanced-search-form .radio-inline{
    margin-right:15px;
    font-weight:500;
}

/* Botón */
#advanced-search-form .btn{
    width:100%;
    margin-top:30px;
    padding:12px;
    border-radius:10px;
    font-size:16px;
    background:#56212f;
    border:none;
    color:#fff;
    transition:.2s;
    cursor:pointer;
}

#advanced-search-form .btn:hover{
    background:#441a25;
}

/* Responsive */
@media(max-width:768px){
    #advanced-search-form .form-group{
        width:50%;
    }
}

@media(max-width:480px){
    #advanced-search-form .form-group{
        width:100%;
    }
}