/* STILE "TROVA L'ERRORE" - CALCOLO DELLE PROBABILITÀ - VERSIONE DSA (v3)
   Linee guida: Alta leggibilità, contrasto riposante, spaziatura aumentata.
*/

:root {
    --bg-dsa: #fdf6e3;
    --text-dsa: #202124;
    --primary-blue: #0056b3;
    --verify-blue: #004494;
    --reset-red: #b22222;
    --index-bordeaux: #800020;
    --step-bg: #fff9e6;
    --green-dsa: #1a6b35;
}

body {
    font-family: 'Verdana', 'Geneva', sans-serif;
    background-color: var(--bg-dsa);
    color: var(--text-dsa);
    line-height: 1.8;
    letter-spacing: 0.05em;
    margin: 0;
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.main-test-wrapper {
    background-color: #ffffff;
    max-width: 1000px;
    width: 100%;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    margin-top: 20px;
    box-sizing: border-box;
}

/* Header v3 (DSA) */
.header-box {
    border: 2.5px dashed var(--green-dsa);
    padding: 12px 14px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    row-gap: 8px;
    background-color: #ffffff;
    cursor: pointer;
    margin-bottom: 18px;
    border-radius: 10px;
}
.header-box .brand-left,
.header-box .brand-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.header-box img { height: 50px; width: auto; }
.header-box .site-url { font-size: 0.9rem; color: #555; font-weight: 600; }
.header-box .logo-block { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.header-box .since { font-size: 0.78rem; color: #999; font-style: italic; }

.breadcrumb {
    font-size: 1rem;
    margin-bottom: 22px;
    color: #555;
}
.breadcrumb a {
    color: var(--green-dsa);
    text-decoration: none;
    font-weight: 700;
}

.main-menu {
    background-color: #f4f7f5;
    border: 1.5px solid var(--green-dsa);
    border-radius: 10px;
    margin-bottom: 28px;
    padding: 6px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}
.main-menu a {
    display: inline-block;
    padding: 11px 20px;
    color: var(--text-dsa);
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    border-radius: 8px;
    transition: all 0.2s ease;
}
.main-menu a:hover, .main-menu a.current {
    background-color: var(--green-dsa);
    color: #ffffff;
}

@media (max-width: 420px) {
    .header-box img { height: 38px; }
    .header-box .site-url { font-size: 0.8rem; }
}

h1 {
    font-size: 2rem;
    color: var(--primary-blue);
    text-align: center;
    margin: 10px 0;
}

.instruction-text {
    background-color: #e7f3ff;
    border-left: 6px solid #0056b3;
    padding: 20px;
    font-weight: bold;
    margin-bottom: 30px;
    border-radius: 4px;
}

.topics-box {
    background: #d4edda;
    padding: 15px;
    border-left: 4px solid #28a745;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.instruction-box {
    background: #fff3cd;
    padding: 15px;
    border-left: 4px solid #ffc107;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

/* Link "torna alla versione standard" (convenzione del sito) */
.standard-link {
    text-align: center;
    margin: 0 0 20px;
}
.standard-link a {
    color: #003d99;
    font-weight: bold;
    text-decoration: none;
    border-bottom: 2px solid #003d99;
}

/* Esercizi */
.question {
    background: #fff;
    border: 2px solid #ced4da;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 40px;
}

.question h3 {
    color: var(--primary-blue);
    font-size: 1.4rem;
    margin-bottom: 15px;
}

.mjx-chtml, .MathJax {
    font-size: 1.25rem !important;
    margin: 15px 0 !important;
}

/* Box "soluzione proposta" (contiene l'errore da trovare) - versione DSA */
.proposed-solution-box {
    background: #fff5f5;
    border: 2px dashed #dc3545;
    border-radius: 10px;
    padding: 20px 22px;
    margin: 18px 0;
    font-size: 1.1rem;
}
.proposed-solution-box p:first-child {
    margin-top: 0;
    color: #a71d2a;
    font-weight: bold;
}
.proposed-solution-box p {
    margin: 10px 0;
    color: #2c3e50;
    line-height: 1.8;
}

.question-prompt {
    font-weight: bold;
    font-size: 1.15rem;
    margin: 18px 0 10px 0;
    color: #333;
}

label {
    display: block;
    background: #f8f9fa;
    padding: 15px;
    margin: 12px 0;
    border-radius: 8px;
    border: 1px solid #dee2e6;
    cursor: pointer;
    transition: background 0.2s;
    word-wrap: break-word;
    overflow-wrap: break-word;
}
label:hover { background: #e9ecef; }

input[type="radio"] {
    transform: scale(1.5);
    margin-right: 15px;
}

.solution {
    display: none;
    margin-top: 0;
    padding: 20px;
    background-color: var(--step-bg);
    border-radius: 0 8px 8px 8px;
    border: 1px dashed #d4a017;
    border-top: none;
    font-size: 1.1rem;
}
.solution ol { line-height: 1.8; }

button {
    font-family: 'Verdana', sans-serif;
    padding: 15px 25px;
    font-size: 1.1rem;
    font-weight: bold;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
    margin: 10px;
}

.btn-secondary, .solution-btn, .solution-toggle-btn {
    background-color: #4a9edd;
    color: white;
    border: 2px solid #0056b3;
}
.btn-secondary:hover, .solution-btn:hover, .solution-toggle-btn:hover {
    background-color: #1a6fa8;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.25);
    transform: translateY(-2px);
}

.btn-active {
    background-color: #d9534f !important;
    color: white !important;
    border: 2px solid #b52b27 !important;
    border-bottom: none !important;
    border-radius: 10px 10px 0 0 !important;
    padding-bottom: 17px !important;
}

button.btn-listen {
    background-color: #28a745 !important;
    color: white !important;
    border: 2px solid #1e7e34 !important;
}
button.btn-listen:hover {
    background-color: #ffffff !important;
    color: #28a745 !important;
    border: 2px solid #28a745 !important;
}
.btn-listen.is-playing {
    background-color: #ffc107 !important;
    color: #333;
    border-color: #e0a800;
}

.btn-verify { background-color: var(--verify-blue); color: white; border: 2px solid var(--verify-blue); }
.btn-verify:hover {
    background-color: white;
    color: var(--verify-blue);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

.btn-reset { background-color: #333333; color: white; border: 2px solid #333333; }
.btn-reset:hover {
    background-color: white;
    color: #333333;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

.btn-print { background-color: #6f42c1; color: white; border: 2px solid #6f42c1; }
.btn-print:hover {
    background-color: white;
    color: #6f42c1;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

.btn-index { background-color: var(--index-bordeaux); color: white; border: 2px solid var(--index-bordeaux); }
.btn-index:hover {
    background-color: white;
    color: var(--index-bordeaux);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

.btn-standard-version {
    background-color: #28a745;
    color: white;
    border: 2px solid #28a745;
}
.btn-standard-version:hover {
    background-color: white;
    color: #28a745;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

footer.site-footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #ddd;
    text-align: center;
    font-size: 0.95rem;
    color: #555;
}
.license-box {
    background-color: #fafafa;
    border: 1px solid #eee;
    border-radius: 10px;
    padding: 18px;
    margin-top: 20px;
    font-size: 0.88rem;
    color: #777;
}
.validation-link {
    margin-top: 15px;
    font-size: 0.85rem;
    color: #999;
}
.validation-link a { color: #999; text-decoration: none; }
.validation-link a:hover { text-decoration: underline; }

.btn-theory {
    background-color: #007bff;
    color: white;
    border: 2px solid #007bff;
}
.btn-theory:hover {
    background-color: white;
    color: #007bff;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

.footer-container {
    display: block;
    text-align: center;
    margin-top: 20px;
    padding: 20px 0;
}
.footer-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.results {
    margin: 30px auto;
    padding: 20px;
    border-radius: 10px;
    background-color: #e9ecef;
    width: 100%;
    max-width: 800px;
    text-align: center;
}
.results h2, .results h3 { color: var(--primary-blue); margin-top: 0; }
.correct { color: green; font-weight: bold; }
.incorrect { color: red; font-weight: bold; }

@media (max-width: 768px) {
    .main-test-wrapper { max-width: 100%; padding: 15px; margin: 0; border-radius: 8px; }
    body { padding: 5px; }
    h1 { font-size: 1.6rem; }
    .instruction-text { padding: 12px; font-size: 0.9rem; }
    .question { padding: 15px; }
    .question h3 { font-size: 1.3rem; }
    label { padding: 12px; font-size: 1rem; }
    button { font-size: 1rem; padding: 12px 20px; }
    .header-box img { max-height: 35px; }
    .solution, .proposed-solution-box { padding: 15px; font-size: 1rem; }
}

@media print {
    .solution {
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        color-adjust: exact !important;
    }
    button,
    .footer-buttons,
    .header-box,
    .breadcrumb,
    .main-menu,
    footer.site-footer,
    input[type="radio"],
    hr,
    .btn-listen {
        display: none !important;
    }
    .question {
        page-break-inside: avoid;
        border: none !important;
        border-bottom: 1px solid #ddd !important;
        margin-bottom: 30px !important;
        padding-bottom: 20px !important;
    }
    body { background: white !important; }
    .main-test-wrapper {
        box-shadow: none !important;
        padding: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
    }
    .solution {
        background: #fffef5 !important;
        border-left: 3px solid #999 !important;
        page-break-inside: avoid;
    }
    .footer-container { display: none !important; }
}

/* Bottone Aiuto e box Hint - Versione DSA */
.solution-button-container {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: flex-start;
    margin-top: 10px;
}

.btn-aiuto {
    background-color: #ffb703;
    color: #333;
    border: 2px solid #0056b3;
    padding: 15px 25px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
    margin: 10px;
    font-family: 'Verdana', sans-serif;
}
.btn-aiuto:hover {
    background-color: #f4a300;
    color: white;
    transform: translateY(-2px);
}
.btn-aiuto.is-active {
    background-color: #e7f1ff !important;
    color: #084298 !important;
    border: 2px solid #74c0fc !important;
    border-bottom: none !important;
    border-radius: 10px 10px 0 0 !important;
    padding-bottom: 17px !important;
    transform: none !important;
}
.btn-aiuto.is-active:hover {
    background-color: #d0ebff !important;
    transform: none !important;
}

.hint-box {
    display: none;
    margin-top: 0;
    padding: 15px 18px;
    background: #e7f1ff;
    border: 2px solid #74c0fc;
    border-radius: 0 8px 8px 8px;
    font-size: 1rem;
    line-height: 1.8;
    color: #084298;
}
.hint-box.visible { display: block; }

@media (max-width: 768px) {
    .solution-button-container { flex-direction: column; align-items: stretch; }
    .btn-aiuto { width: 100%; margin: 5px 0; }
}

/* Bottone torna su */
#btn-top {
    position: fixed;
    bottom: 20px;
    right: 4px;
    background: #9C27B0;
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 1.3rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.25);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 999;
    transition: background 0.2s;
}
#btn-top:hover { background: #7a00cc; }

.sr-only {
    position: absolute;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
}

@media print {
    #btn-top { display: none !important; }
}