/* style.css */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
body.no-scroll { /* Per bloccare lo scroll quando il menu mobile è aperto */
    overflow: hidden;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 20px auto;
    overflow: visible;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 8px;
    flex-grow: 1;
}

.hero {
    width: 100%;
    max-height: 300px;
    overflow: hidden;
}

.hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.intro-icon {
    display: block;
    margin: 0 auto 20px;
    width: 80px;
    height: auto;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem 0;
    border-bottom: #0779e4 3px solid;
    width: 100%;
    position: sticky; 
    top: 0;
    z-index: 1000; 
}

header .header-content {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative; 
}

header a.logo-link {
    text-decoration: none;
    color: #fff;
    z-index: 10; 
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

/* ------------- Desktop Navigation ------------- */
nav#main-nav ul {
    padding: 0;
    list-style: none;
    margin: 0;
    display: flex; 
}

nav#main-nav ul li {
    position: relative; 
    margin: 0 5px; 
}

nav#main-nav ul li a {
    color: #fff;
    text-decoration: none;
    padding: 10px 12px;
    display: block;
    transition: background-color 0.3s ease;
    border-radius: 4px;
    font-size: 0.95rem;
    white-space: nowrap;
}
nav#main-nav ul li a .arrow { 
    font-size: 0.7em;
    margin-left: 5px;
    display: inline-block;
    transition: transform 0.3s ease; /* Animazione freccia */
}

nav#main-nav ul li a.button {
    background-color: #0779e4;
}
nav#main-nav ul li a.button:hover {
    background-color: #0056b3;
}

nav#main-nav ul li a:not(.button):hover {
    background-color: #555;
}

nav#main-nav ul li a.active {
    background-color: #0779e4;
}
nav#main-nav ul li a.active:hover {
    background-color: #0056b3;
}

/* Dropdown Menu Desktop */
nav#main-nav ul li:hover > a .arrow { /* Ruota freccia su hover del LI genitore */
    transform: rotate(180deg);
}
nav#main-nav ul li:hover > ul.dropdown, 
nav#main-nav ul li a:focus + ul.dropdown { 
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

nav#main-nav ul li ul.dropdown {
    display: block; 
    opacity: 0;
    visibility: hidden;
    position: absolute;
    background-color: #3a3a3a; 
    min-width: 230px; 
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.3);
    z-index: 100; 
    left: 0; 
    top: 100%; 
    border-radius: 0 0 4px 4px;
    padding: 5px 0;
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
    transform: translateY(10px); 
}

nav#main-nav ul li ul.dropdown li {
    display: block; 
    width: 100%;
    text-align: left;
    margin: 0;
}

nav#main-nav ul li ul.dropdown li a {
    padding: 10px 15px; 
    color: #f0f0f0;
    font-size: 0.95em;
    border-radius: 0; 
}
nav#main-nav ul li ul.dropdown li a:hover {
    background-color: #0779e4;
    color: #fff;
}

/* ------------- Mobile Navigation (Menu Toggle) ------------- */
.menu-toggle {
    display: none; 
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem; 
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001; 
    width: 40px; 
    height: 40px;
    position: relative; 
}
.hamburger-icon {
    display: block;
    width: 24px; 
    height: 3px; 
    background-color: white;
    position: relative;
    transition: background-color 0s 0.3s; 
}
.hamburger-icon::before,
.hamburger-icon::after {
    content: '';
    display: block;
    width: 100%;
    height: 100%;
    background-color: white;
    position: absolute;
    left: 0;
    transition: transform 0.3s ease;
}
.hamburger-icon::before {
    top: -8px; 
}
.hamburger-icon::after {
    bottom: -8px; 
}

/* Animazione Hamburger -> X */
.menu-toggle[aria-expanded="true"] .hamburger-icon {
    background-color: transparent; 
}
.menu-toggle[aria-expanded="true"] .hamburger-icon::before {
    transform: translateY(8px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] .hamburger-icon::after {
    transform: translateY(-8px) rotate(-45deg);
}


/* ------------- Quiz/Exam Specific Styles (invariati, ma riportati) ------------- */
.quiz-container, .exam-container {
    padding: 15px; 
    border: 1px solid #ddd;
    border-radius: 5px;
    margin-top: 20px;
}
.question-info { margin-bottom: 15px; padding-bottom: 10px; border-bottom: 1px solid #eee; font-size: 0.9em; color: #555; }
.question-text { font-size: 1.1em; margin-bottom: 15px; font-weight: bold; }
.answers label { display: block; margin-bottom: 10px; padding: 10px 12px; border: 1px solid #ccc; border-radius: 4px; cursor: pointer; transition: background-color 0.3s ease, border-color 0.3s ease; background-color: #f9f9f9; }
.answers label:hover { background-color: #e9e9e9; border-color: #bbb; }
.answers input[type="radio"] { margin-right: 10px; vertical-align: middle; transform: scale(1.1); }
button[type="submit"], .button { background: #0779e4; color: #fff; border: none; padding: 10px 18px; font-size: 1em; border-radius: 5px; cursor: pointer; text-decoration: none; display: inline-block; margin-top: 15px; transition: background-color 0.3s ease; font-weight: bold; }
.button.review-button { background-color: #5cb85c; margin-right: 10px; }
.button.review-button:hover { background-color: #4cae4c; }
button[type="submit"]:hover, .button:hover { background: #0056b3; }
.message-area { padding: 12px; margin-bottom: 15px; border-radius: 4px; font-weight: 500; }
.message-area.success { background-color: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.message-area.failure { background-color: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.results { padding: 15px; margin-top: 15px; border-radius: 5px; }
.results.success { background-color: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.results.failure { background-color: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.error-message { color: #721c24; background-color: #f8d7da; border: 1px solid #f5c6cb; padding: 10px; margin-bottom: 15px; border-radius: 4px; }
.timer { font-size: 1.1em; font-weight: bold; color: #d9534f; text-align: right; margin-bottom: 10px; }
.feedback-details { background-color: #f9f9f9; border: 1px solid #ddd; padding: 12px; margin-bottom: 15px; border-radius: 5px; }
.feedback-details h4 { margin-top: 0; color: #333; }
.feedback-details p { margin-bottom: 8px; }

footer {
    background: #333;
    color: #ccc;
    text-align: center;
    padding: 1rem 0;
    margin-top: auto; 
    width: 100%;
}
footer p {
    margin: 0;
    font-size: 0.9em;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}
table th, table td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: left;
}
table th {
    background-color: #f2f2f2;
}

.modal-content { width: 90%; margin: 10% auto; }

details.collapsible {
    margin-bottom: 20px;
}
details.collapsible summary {
    cursor: pointer;
    padding: 8px 12px;
    background-color: #f2f2f2;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-weight: bold;
    list-style: none;
}
details.collapsible summary::-webkit-details-marker {
    display: none;
}
details.collapsible summary small {
    font-weight: normal;
    margin-left: 6px;
    font-size: 0.8em;
}

form.update-form fieldset {
    border: 1px solid #ddd;
    padding: 10px 15px;
    margin-bottom: 15px;
    border-radius: 4px;
}
form.update-form legend {
    padding: 0 5px;
    font-weight: bold;
}
form.update-form label {
    display: block;
    margin-bottom: 10px;
}

form.auth-form {
    max-width: 400px;
    margin: 0 auto;
}
form.auth-form .form-group {
    margin-bottom: 15px;
}
form.auth-form label {
    display: block;
    margin-bottom: 5px;
}
form.auth-form input {
    width: 100%;
    padding: 8px;
    box-sizing: border-box;
}

/* ------------- Media Queries per Responsive Design ------------- */
@media (max-width: 768px) {
    header .header-content {
        /* Non c'è bisogno di flex-direction: column qui, 
           il menu toggle andrà a destra e il logo a sinistra naturalmente */
    }
    header h1 {
        font-size: 1.2rem;
    }
    
    .menu-toggle {
        display: flex; 
        align-items: center;
        justify-content: center;
    }

    nav#main-nav ul#main-nav-ul {
        display: none; 
        flex-direction: column;
        width: 100%;
        background-color: #333; 
        position: absolute; 
        top: calc(100% + 3px); /* Altezza header + bordo inferiore */
        left: 0;
        right: 0;
        box-shadow: 0 5px 10px rgba(0,0,0,0.2);
        max-height: calc(100vh - 70px); /* Altezza massima, 70px è un'altezza approssimativa dell'header + padding */
        overflow-y: auto; 
        padding-bottom: 0;  /* Rimosso padding bottom per far arrivare i bordi fino in fondo */
        border-top: 3px solid #0779e4; /* Bordo superiore per staccare visivamente */
    }

    nav#main-nav ul#main-nav-ul.active {
        display: flex; 
    }

    nav#main-nav ul#main-nav-ul li {
        width: 100%;
        margin: 0;
        text-align: left; 
    }
    nav#main-nav ul#main-nav-ul li a {
        padding: 15px 20px; 
        border-bottom: 1px solid #4a4a4a; 
        font-size: 1rem;
        display: flex; /* Per allineare freccia e testo */
        justify-content: space-between; /* Spinge la freccia a destra */
        align-items: center;
    }
    nav#main-nav ul#main-nav-ul li:last-child > a { /* Solo il link diretto, non quelli nei dropdown */
        border-bottom: none;
    }
    nav#main-nav ul#main-nav-ul li a.button { 
        margin: 10px 20px;
        text-align: center;
        width: calc(100% - 40px); /* Larghezza meno i margini */
        box-sizing: border-box;
        display: block; /* Per occupare la larghezza */
        justify-content: center; /* Centra il testo del bottone */
    }
     nav#main-nav ul#main-nav-ul li a.button .arrow {
        display: none; /* Nasconde la freccia per i link stile bottone */
    }


    /* Dropdown mobile */
    nav#main-nav ul#main-nav-ul li a .arrow {
        /* float: right;  Rimosso, usiamo flexbox */
        transition: transform 0.3s ease;
    }
    nav#main-nav ul#main-nav-ul li.open > a .arrow {
        transform: rotate(180deg); 
    }

    nav#main-nav ul#main-nav-ul li ul.dropdown {
        position: static; 
        width: 100%;
        box-shadow: none;
        /* border-top: 1px solid #4a4a4a; Rimosso, il bordo è già sul link genitore */
        background-color: #2a2a2a; /* Sfondo leggermente più scuro per sottomenu */
        padding: 0;
        opacity: 1; 
        visibility: visible;
        transform: none;
        display: none; 
    }
     nav#main-nav ul#main-nav-ul li.open > ul.dropdown { 
        display: block;
    }

    nav#main-nav ul#main-nav-ul li ul.dropdown li a {
        padding-left: 35px; 
        font-size: 0.9rem;
        color: #ccc; /* Testo più chiaro per sottomenu */
        border-bottom: 1px solid #404040; /* Separatori sottomenu */
    }
    nav#main-nav ul#main-nav-ul li ul.dropdown li:last-child a {
        border-bottom: none;
    }
     nav#main-nav ul#main-nav-ul li ul.dropdown li a:hover {
        background-color: #0779e4;
        color: #fff;
    }


    .container { width: 95%; padding: 15px; }
    .question-text { font-size: 1em; }
    .answers label { padding: 10px; }
    button[type="submit"], .button { padding: 12px 18px; width: 100%; box-sizing: border-box; margin-top: 10px; }
    .button.review-button { margin-right: 0; margin-bottom:10px; }
    form[style="display: inline-block;"] { display: block; width: 100%; }
    form[style="display: inline-block;"] .button { margin-left: 0 !important; }
    a.button[style*="margin-left"] { margin-left: 0 !important; margin-top: 10px; }
    .timer { font-size: 1em; text-align: center; margin-bottom: 15px; }
}

@media (max-width: 480px) {
    header h1 { font-size: 1rem; }
    .menu-toggle { font-size: 1.6rem; } /* Controlla .hamburger-icon per la dimensione effettiva */
    .container { padding: 10px; }
    .question-text { font-size: 0.95em; }
    .answers label { font-size: 0.9em; padding: 8px 10px; }
    .answers input[type="radio"] { margin-right: 8px; transform: scale(1); }
}
.unverified { background-color: #f8d7da; }