:root {
    --color-primary: #333333; /* testo scuro */
    --color-secondary: #ffffff; /* testo chiaro */ 
    --color-custom-1: #f6eee5; /* usato per header/footer */
    --color-custom-2: #c07241; /* icone e menu */
}

html {
    font-size: 16px;
}

body {
    font-family: 'Roboto', 'Open Sans', sans-serif; /* font preferiti e di fallback */
    line-height: 1.6;
}

a {
    text-decoration: none;
}


ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.main-header {
    background-color: var(--color-custom-1);
    padding: 15px 20px;
    display: flex;
    flex-wrap: wrap; 
    justify-content: space-between; 
    align-items: center;
    position: relative;
}

.main-header .logo { 
    max-width: 280px;
    height: auto;
    display: block; 
}

.logo img { /* Selettore discendente */
    width: 100%;
    height: auto;
    display: block;
}

.main-nav {
    flex-grow: 1; 
    display: flex;
    justify-content: flex-end;
}

.main-nav ul {
    display: flex;
    gap: 20px; /* No margin*/
}

.main-nav a {
    color: var(--color-primary);
    font-weight: 700;
    text-transform: uppercase;
    padding: 5px 10px;
    transition: color 0.3s ease;
}

.main-nav a:hover {
    color: var(--color-custom-2);
}

/* Bottone Hamburger  */
.menu-toggle {
    display: none; 
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: 1.8rem;
    cursor: pointer;
    padding: 10px;
}


.intro-section {
    display: flex;
    flex-wrap: wrap; 
    min-height: 590px;
}

.intro-image-container {
    flex: 1; 
    min-width: 300px; 
    position: relative; 
    padding: 0; 
    display: flex; 
    align-items: center;
    justify-content: center;
}

.intro-image-container img {
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
    position: absolute; 
    top: 0;
    left: 0;
}


.intro-text-container {
    flex: 1; 
    min-width: 300px; 
    background-color: #e5d0b7;
    padding: 40px; 
    display: flex;
    flex-direction: column;
    justify-content: center; 
    text-align: left;
}

.intro-text-container h1 {
    font-size: 3rem;
    font-family: 'Roboto', sans-serif; 
    color: var(--color-primary);
    margin-bottom: 15px;
    line-height: 1.2;
}

.intro-text-container h2 {
    font-size: 1.5rem;
    font-family: 'Open Sans', sans-serif; 
    color: var(--color-primary);
    margin-bottom: 20px;
    line-height: 1.3;
}

.intro-text-container p {
    font-size: 1.125rem;
    color: var(--color-primary);
    margin-bottom: 0;
}

.divider-section {
    background-color: #9b0c04;
    min-height: 60px; 
}

.about-section {
    background-image: url('../img/umanista_digitale.jpg'); 
    background-size: cover;
    background-position: center;
    background-attachment: scroll;
    padding: 80px 20px;
    text-align: center;
    position: relative;
}

.about-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.about-section .content-wrapper {
    position: relative;
    z-index: 2; 
    max-width: 900px;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 30px 40px;
    margin: auto;
}

.about-section h2 {
    font-size: 2.5rem;
    margin-bottom: 30px;
    line-height: 1.2;
    color: var(--color-secondary);
}

.about-section p {
    font-size: 1.25rem;
    text-align: justify;
    line-height: 1.7;
    margin-bottom: 0;
    color: var(--color-secondary);
}

.main-footer {
    background-color: var(--color-custom-1);
    padding: 30px 20px;
    text-align: center;
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-bottom: 20px;
}

.social-icons a {
    width: 48px; 
    height: 48px; 
    border-radius: 50%;
    background-color:var(--color-custom-2);
    display: flex; /* Centra icone all'interno del cerchio*/
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
    text-decoration: none;
}

.footer-text {
    color: var(--color-primary);
    font-size: 0.875rem;
}

@media (max-width: 991.98px) {
    .main-header {
        padding: 10px 15px;
    }
    .main-header .logo {
        max-width: 220px;
    }
    .main-nav ul {
        gap: 15px;
    }
    .main-nav a {
        padding: 5px 8px;
    }
    .intro-section {
        min-height: auto;
    }
    .intro-image-container {
        flex: 1 1 50%;
        min-height: 350px;
    }
    .intro-text-container {
        flex: 1 1 50%;
        padding: 30px;
    }
    .intro-text-container h1 {
        font-size: 2.5rem;
    }
    .intro-text-container h2 {
        font-size: 1.3rem;
    }
    .intro-text-container p {
        font-size: 1.05rem;
    }
    .divider-section {
        min-height: 50px;
    }
    .about-section {
        padding: 60px 15px;
    }
    .about-section .content-wrapper {
        padding: 25px 30px;
    }
    .about-section h2 {
        font-size: 2.2rem;
    }
    .about-section p {
        font-size: 1.15rem;
    }
    .social-icons {
        gap: 20px;
    }
}

@media (max-width: 767px) {
    .main-header {
        padding: 10px 15px;
        flex-wrap: nowrap; 
    }

    .main-header .logo img {
        max-width: 150px;
    }

    .menu-toggle {
        display: block; /* Rende visibile il menu hamburger */
    }

    .main-nav {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: var(--color-custom-1);
        position: absolute;
        top: 100%;
        left: 0;
        z-index: 1000; 
    }

    .main-nav.menu-open {
        display: flex;
        background-color: var(--color-custom-1);
    }

    .main-nav ul {
        flex-direction: column;
        width: 100%;
    }

    .main-nav li {
        width: 100%;
        text-align: center;
    }

    .main-nav a {
        padding: 15px 0; 
        display: block;
        color: var(--color-primary);
    }

    .main-nav a:hover {
        color: var(--color-custom-2);
    }

    .intro-image-container,
    .intro-text-container {
        padding: 20px;
    }

    .intro-text-container h1 {
        font-size: 1.8rem;
    }

    .intro-text-container h2 {
        font-size: 1.1rem;
    }

    .intro-text-container p {
        font-size: 1rem;
    }

    .about-section {
        padding: 40px 10px;
    }
}

    @media (max-width: 400px) {
    .intro-text-container h1 {
        font-size: 1.6rem;
    }
    .intro-text-container h2 {
        font-size: 1rem;
    }
    .intro-text-container p {
        font-size: 0.9rem;
    }
    .about-section h2 {
        font-size: 1.6rem;
    }
    .about-section p {
        font-size: 0.9rem;
    }
}