/* 1. VARIABILI E STILI GLOBALI
------------------------------------ */
:root {
    --rosso-unipd: #9B0014;
    --rosso-hover: #B70018;
    --light-grey: #f2f2f2;
    --dark-grey-footer: #333333;
    --text-color: #111111;
    --text-light: #ffffff;
    --font-primary: 'Lato', sans-serif;
    --font-secondary: 'Lato', sans-serif;
}

body {
    margin: 0;
    font-family: var(--font-secondary);
    color: var(--text-color);
    background-color: #fff;
    line-height: 1.7;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    font-family: var(--font-primary);
    font-weight: 600;
}

/* 2. HEADER E NAVIGAZIONE
------------------------------------ */
.site-header {
    background-color: var(--rosso-unipd);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
}

.site-header .container {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative; 
}

.main-nav {
    text-align: center;
}

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

.main-nav ul li {
    display: inline-block;
    margin: 0 20px;
}

.main-nav a {
    color: var(--text-light);
    text-decoration: none;
    font-family: var(--font-primary);
    font-weight: 700;
    font-size: 1.2rem;
    padding: 10px 0;
    transition: color 0.3s ease;
    text-transform: uppercase;
}

.main-nav a:hover, .main-nav a.active {
    color: #e0e0e0;
}

/* 3. SEZIONI
------------------------------------ */
.page-section {
    padding: 80px 0;
}

.content-card {
    background-color: #ffffff;
    padding: 40px 50px;
    border-radius: 5px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    text-align: center;
}

.content-card h1 {
    font-size: 2.8rem;
    margin-top: 0;
    margin-bottom: 30px;
}

.text-justify {
    text-align: justify;
}

/* 4. BOTTONI
------------------------------------ */
.btn {
    display: inline-block;
    background-color: transparent;
    color: var(--rosso-unipd);
    padding: 12px 30px;
    text-decoration: none;
    font-family: var(--font-primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 5px;
    transition: background-color 0.3s ease, color 0.3s ease;
    border: 2px solid var(--rosso-unipd);
    cursor: pointer;
}

.btn:hover {
    background-color: var(--rosso-unipd);
    color: var(--text-light);
}

/* 5. FOOTER
------------------------------------ */
.site-footer-dark {
    background-color: var(--dark-grey-footer);
    color: var(--text-light); /* MODIFICATO: Colore del testo bianco */
    padding: 25px 0;
    text-align: center;
}

.footer-logos {
    display: flex;
    justify-content: space-between; 
    align-items: center;
    flex-wrap: wrap; 
}

.footer-logo {
    height: 110px;
    opacity: 1; /* MODIFICATO: Opacità rimossa */
}

.site-footer-dark p {
    font-size: 0.9rem;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid #555555;
}

/* 6. MENU A TENDINA (DROPDOWN)
------------------------------------ */
.main-nav .nav-item {
    position: relative;
}

.main-nav .dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--rosso-unipd);
    list-style: none;
    padding: 10px 0;
    margin: 0;
    min-width: 220px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    z-index: 1001;
    border-radius: 0 0 5px 5px; 
}

.main-nav .nav-item:hover .dropdown-menu {
    display: block;
}

.main-nav .dropdown-menu li {
    display: block;
}

.main-nav .dropdown-menu a {
    padding: 10px 20px;
    display: block;
    white-space: nowrap;
    text-align: left;
}

/* 7. BOX PASSWORD
------------------------------------ */
.password-page-container {
    padding: 80px 0;
    background-color: var(--light-grey);
}

.password-box {
    max-width: 500px;
    margin: 0 auto;
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.password-box h2 {
    margin-top: 0;
}

.password-box #password-input {
    width: 100%;
    padding: 12px;
    margin: 20px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-sizing: border-box;
}

.error-text {
    color: var(--rosso-unipd);
    margin-top: 15px;
    min-height: 20px;
}


/* 8. RESPONSIVE E MENU HAMBURGER
------------------------------------ */
.hamburger-btn, .mobile-logo { display: none; }
.mobile-menu { display: none; }

@media (max-width: 991px) {
    .site-header { padding: 25px 0; }
    .main-nav { display: none; }
    
    .hamburger-btn {
        display: block;
        background: none;
        border: none;
        color: white;
        font-size: 24px;
        cursor: pointer;
        position: absolute;
        right: 20px; 
    }
    
    .mobile-logo {
        display: block;
        position: absolute;
        left: 20px;
        height: 40px;
    }
    
    .site-header .container {
        justify-content: center; 
    }

    .mobile-menu {
        display: none;
        flex-direction: column;
        background-color: var(--rosso-unipd);
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        padding: 10px 0;
        box-shadow: 0 3px 6px rgba(0,0,0,0.1);
    }
    .mobile-menu.is-open {
        display: flex;
    }

    .mobile-menu a,
    .mobile-menu-item-with-submenu .submenu-toggle {
        color: white;
        text-decoration: none;
        padding: 15px 20px;
        text-align: center;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        font-family: var(--font-primary);
        font-size: 1.1rem;
        text-transform: uppercase;
    }
    
    .mobile-menu a:last-of-type,
    .mobile-menu-item-with-submenu:last-of-type .submenu-toggle {
        border-bottom: none;
    }
    
    .mobile-menu-item-with-submenu .submenu-toggle {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
        background: none;
        border: none;
        cursor: pointer;
    }
    .mobile-menu-item-with-submenu .submenu-toggle i {
        margin-left: 10px;
        transition: transform 0.3s ease;
    }
    .mobile-menu-item-with-submenu .submenu-toggle.is-rotated i {
        transform: rotate(180deg);
    }
    
    .mobile-submenu {
        display: none;
        background-color: rgba(0,0,0,0.15);
    }
    .mobile-submenu.is-open {
        display: flex;
        flex-direction: column;
    }
    .mobile-submenu a {
        font-size: 1rem;
        font-weight: 400;
        background-color: rgba(0,0,0,0.1);
    }
}

@media (max-width: 575px) {
    .footer-logos {
        justify-content: center; 
        gap: 30px;
    }
}

/* 9. PULSANTE SCROLL-TO-TOP
------------------------------------ */
#scrollTopBtn {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    border: none;
    outline: none;
    background-color: var(--rosso-unipd);
    color: white;
    cursor: pointer;
    padding: 15px;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 18px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: background-color 0.3s, opacity 0.4s;
}

#scrollTopBtn:hover {
    background-color: var(--rosso-hover);
}

/* --- FIX PER FOOTER ADESIVO E LAYOUT FLESSIBILE --- */
body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main, #password-entry {
    flex-grow: 1;
}