* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

:root {
    --rosso-carraresi: #8B1538;
    --rosso-scuro: #5C0D24;
    --bianco: #FFFFFF;
    --grigio-chiaro: #F5F5F5;
    --grigio: #E0E0E0;
    --nero: #2C2C2C;
}

body.accessibility-mode {
    --rosso-carraresi: #000000;
    --rosso-scuro: #000000;
    --bianco: #FFFFFF;
    --grigio-chiaro: #FFFFFF;
    --grigio: #CCCCCC;
    --nero: #000000;
    font-family: 'Arial', 'Helvetica', sans-serif;
    line-height: 1.8;
    font-size: 18px;
}

body {
    font-family: 'Georgia', serif;
    line-height: 1.6;
    color: var(--nero);
    background-color: var(--grigio-chiaro);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background: linear-gradient(135deg, var(--rosso-carraresi), var(--rosso-scuro));
    color: var(--bianco);
    padding: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 60px;
}

.logo-container {
    text-align: center;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 2px;
    margin: 0;
}

.accessibility-btn {
    position: absolute;
    top: 0.75rem;
    left: 1rem;
    background: transparent;
    border: 2px solid var(--bianco);
    color: var(--bianco);
    font-size: 1.3rem;
    padding: 0.4rem 0.7rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s;
    line-height: 1;
    height: fit-content;
}

.accessibility-btn:hover {
    background: var(--bianco);
    color: var(--rosso-carraresi);
}

.accessibility-btn:focus {
    outline: 3px solid #FFD700;
    outline-offset: 2px;
}

body.accessibility-mode .accessibility-btn {
    background: #FFD700;
    color: #000000;
    border-color: #FFD700;
    font-weight: bold;
}

.language-select {
    position: absolute;
    top: 0.75rem;
    right: 4.5rem;
    background: transparent;
    border: 2px solid var(--bianco);
    color: var(--bianco);
    font-size: 0.9rem;
    padding: 0.4rem 0.5rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s;
    height: fit-content;
}

.language-select:hover {
    background: var(--bianco);
    color: var(--rosso-carraresi);
}

.language-select option {
    background: var(--rosso-carraresi);
    color: var(--bianco);
}

.menu-btn {
    position: absolute;
    top: 0.75rem;
    right: 1rem;
    background: transparent;
    border: 2px solid var(--bianco);
    color: var(--bianco);
    font-size: 1.2rem;
    padding: 0.4rem 0.7rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s;
    line-height: 1;
    height: fit-content;
}

.menu-btn:hover {
    background: var(--bianco);
    color: var(--rosso-carraresi);
}

.menu-overlay {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 400px;
    height: 100vh;
    background: var(--bianco);
    box-shadow: -4px 0 12px rgba(0,0,0,0.3);
    transition: right 0.3s ease-in-out;
    z-index: 1000;
    overflow-y: auto;
}

.menu-overlay.active {
    right: 0;
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    font-size: 2rem;
    color: var(--rosso-carraresi);
    cursor: pointer;
}

#menuList {
    list-style: none;
    padding: 4rem 2rem 2rem 2rem;
}

#menuList li {
    margin-bottom: 1rem;
}

#menuList a {
    display: block;
    padding: 1rem;
    color: var(--nero);
    text-decoration: none;
    border-left: 4px solid transparent;
    transition: all 0.3s;
    font-size: 1.1rem;
}

#menuList a:hover,
#menuList a.active {
    background: var(--grigio-chiaro);
    border-left-color: var(--rosso-carraresi);
    padding-left: 1.5rem;
}

#menuList a.visited {
    color: var(--rosso-scuro);
}

#menuList a.visited::after {
    content: " ✓";
    color: var(--rosso-carraresi);
}

main {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
    flex: 1;
}

.content-container {
    background: var(--bianco);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--grigio);
    border-radius: 4px;
    margin-bottom: 2rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--rosso-carraresi), var(--rosso-scuro));
    transition: width 0.3s ease;
}

#contentTitle {
    color: var(--rosso-carraresi);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--rosso-carraresi);
    padding-bottom: 0.5rem;
}

.image-container {
    margin: 2rem 0;
    display: grid;
    gap: 1rem;
}

.image-container img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.text-content {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    text-align: justify;
}

.audio-player {
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--grigio-chiaro);
    border-radius: 8px;
    border-left: 4px solid var(--rosso-carraresi);
}

.audio-player audio {
    width: 100%;
}

.details-section {
    margin-top: 2rem;
}

.detail-item {
    background: var(--grigio-chiaro);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    border-left: 4px solid var(--rosso-carraresi);
}

.detail-item h3 {
    color: var(--rosso-scuro);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.detail-item p {
    line-height: 1.6;
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
    gap: 1rem;
}

.nav-btn {
    flex: 1;
    padding: 1rem 1.5rem;
    background: var(--rosso-carraresi);
    color: var(--bianco);
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Georgia', serif;
}

.nav-btn:hover {
    background: var(--rosso-scuro);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.nav-btn:disabled {
    background: var(--grigio);
    color: #999;
    cursor: not-allowed;
    transform: none;
}

footer {
    background: var(--rosso-scuro);
    color: var(--bianco);
    text-align: center;
    padding: 2rem 1rem;
    margin-top: auto;
}

footer p {
    margin-bottom: 1rem;
}

.reset-btn {
    background: transparent;
    color: var(--bianco);
    border: 2px solid var(--bianco);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

.reset-btn:hover {
    background: var(--bianco);
    color: var(--rosso-scuro);
}

@media (max-width: 600px) {
    header h1 {
        font-size: 1.2rem;
    }

    .content-container {
        padding: 1.5rem;
    }

    #contentTitle {
        font-size: 1.5rem;
    }

    .text-content {
        font-size: 1rem;
    }

    .navigation-buttons {
        flex-direction: column;
    }

    .nav-btn {
        width: 100%;
    }
}

@media (min-width: 768px) {
    .image-container.multiple {
        grid-template-columns: repeat(2, 1fr);
    }
}

body.accessibility-mode #contentTitle {
    font-size: 2.5rem;
    font-weight: bold;
    color: #000000;
    border-bottom: 4px solid #000000;
}

body.accessibility-mode .text-content {
    font-size: 1.3rem;
    line-height: 2;
    letter-spacing: 0.5px;
    word-spacing: 2px;
    text-align: left;
    color: #000000;
    font-weight: 500;
}

body.accessibility-mode .content-container {
    background: #FFFFFF;
    border: 3px solid #000000;
    max-width: 900px;
    padding: 2.5rem;
}

body.accessibility-mode .detail-item {
    background: #FFFFFF;
    border: 2px solid #000000;
    border-left: 6px solid #000000;
}

body.accessibility-mode .detail-item h3 {
    font-size: 1.5rem;
    color: #000000;
    font-weight: bold;
}

body.accessibility-mode .detail-item p {
    font-size: 1.2rem;
    line-height: 1.9;
    color: #000000;
}

body.accessibility-mode .nav-btn {
    background: #000000;
    color: #FFFFFF;
    font-size: 1.2rem;
    padding: 1.2rem 2rem;
    border: 3px solid #000000;
    font-weight: bold;
}

body.accessibility-mode .nav-btn:hover:not(:disabled) {
    background: #FFFFFF;
    color: #000000;
}

body.accessibility-mode .nav-btn:disabled {
    background: #CCCCCC;
    color: #666666;
    border-color: #CCCCCC;
}

body.accessibility-mode .nav-btn:focus {
    outline: 4px solid #FFD700;
    outline-offset: 3px;
}

body.accessibility-mode .progress-bar {
    height: 12px;
    border: 2px solid #000000;
}

body.accessibility-mode .progress-fill {
    background: #000000;
}

body.accessibility-mode #menuList a {
    font-size: 1.2rem;
    font-weight: 500;
    color: #000000;
    border-left: 5px solid transparent;
}

body.accessibility-mode #menuList a:hover,
body.accessibility-mode #menuList a.active {
    background: #000000;
    color: #FFFFFF;
    border-left-color: #FFD700;
}

body.accessibility-mode #menuList a:focus {
    outline: 3px solid #FFD700;
    outline-offset: -3px;
}

body.accessibility-mode .image-container {
    border: 3px solid #000000;
    padding: 1rem;
    background: #F0F0F0;
}

body.accessibility-mode .image-container img {
    border: 2px solid #000000;
}

body.accessibility-mode .audio-player {
    background: #FFFFFF;
    border: 3px solid #000000;
    border-left: 6px solid #000000;
}

body.accessibility-mode header {
    background: #000000;
    border-bottom: 4px solid #FFD700;
}

body.accessibility-mode footer {
    background: #000000;
    border-top: 4px solid #FFD700;
}

.accessibility-notification {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: #000000;
    color: #FFFFFF;
    padding: 1rem 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    z-index: 10000;
    font-size: 1.1rem;
    font-weight: bold;
    opacity: 0;
    transition: all 0.3s ease;
    border: 3px solid #FFD700;
}

.accessibility-notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

body.accessibility-mode .accessibility-notification {
    font-size: 1.3rem;
    padding: 1.5rem 2.5rem;
}

.completion-badge {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    margin: 2rem 0;
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.3);
    border: 2px solid #20c997;
}

.completion-badge h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.completion-badge p {
    font-size: 1rem;
    opacity: 0.95;
    margin: 0.5rem 0;
}

.completion-badge .stats {
    font-size: 1.1rem;
    font-weight: bold;
    margin-top: 0.5rem;
}

body.accessibility-mode .completion-badge {
    background: #000000;
    border: 4px solid #FFD700;
    padding: 2rem;
}

body.accessibility-mode .completion-badge h3 {
    font-size: 2rem;
    color: #FFD700;
}

body.accessibility-mode .completion-badge p {
    font-size: 1.3rem;
    line-height: 1.8;
}