.page-header {
    padding: 10px 5px;
    padding-top: 40px;
    text-align: center;
}

.page-header h1 {
    font-size: 2.4rem;
    margin-bottom: 10px;
}

#middle {
    flex-grow: 2;
}

.container {
    width: 93%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

#form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    justify-content: center;
    align-items: stretch;
    flex-direction: row;
    gap: 40px;
    margin: 40px auto;
    width: 98%;
    max-width: 1000px;
}

@media only screen and (max-width: 899px) {
    #form {
        grid-template-columns: 1fr;
    }
}

#form h2 {
    margin-bottom: 10px;
    user-select: none;
}

.form-left,
.form-right,
.form-group {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.form-left,
.form-right {
    gap: 15px;
    border: 2px dashed var(--secondario);
    border-radius: calc(var(--radius) * 3);
    padding: 35px 25px;
    background-color: var(--form-box);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.form-left {
    border-color: hsla(120, 100%, 30%, 0.6);
}

.form-right {
    border-color: hsla(197, 100%, 40%, 0.6);
}

.form-group {
    gap: 8px;
}

#form label {
    font-weight: bold;
    user-select: none;
}

input, select {
    outline: none !important;
    background-color: var(--input);
    color: var(--testo);
    text-align: left;
    text-decoration: none;
    display: inline-block;
    font-size: 15px;
    border-radius: var(--radius);
    padding: 7px 8px;
    border: 1px solid var(--bordo);
    width: 100%;
    transition: var(--t);
}

input:hover, 
select:hover {
    border-color: var(--primario);
}

input:focus,
select:focus {
    border-color: var(--primario);
}

input:disabled,
select:disabled {
    opacity: 0.5;
}

input[type=number] {
    appearance: textfield;
    -moz-appearance: textfield;
}

.flex {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
}

.required-label::after {
    content: " *";
    color: var(--red);
    position: absolute;
    margin-left: 2px;
}

button#generate-btn {
    background-color: var(--primario);
    border: none;
    color: #101010;
    padding: 14px 20px;
    text-align: center;
    text-decoration: none;
    display: flex;
    font-size: 16px;
    border-radius: calc(var(--radius) * 2);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.2px;
    cursor: pointer;
    width: 100%;
    max-width: 350px;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    gap: 8px;
    transition: var(--t);
    user-select: none;
}

button#generate-btn:hover {
    filter: brightness(1.3);
}

button#generate-btn {
    margin-bottom: 30px;
    margin-left: auto;
    margin-right: auto;
}

button#generate-btn img {
    filter: brightness(0);
}