:root {
    --primary: #3D8BF2;
    --secondary: #0D6EFD;
    --accent: #0DCAF0;
    --light: #f8f9fa;
    --dark: #212529;
    --success: #198754;
    --warning: #FD7E14;
    --space: #0A1428;
    --text-dark: #212529;
    --text-light: #f8f9fa;
    --card-bg: rgba(255, 255, 255, 0.95);
}


* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Open Sans', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}


body {
    background: var(--space);
    color: var(--text-light);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: url('immagini/sfondo-stelle.png');
    background-size: cover;
    line-height: 1.6;
}


.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}


header {
    text-align: center;
    padding: 20px 0;
    margin-bottom: 30px;
    position: relative;
}


h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
    background: linear-gradient(to right, var(--warning), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: titleGlow 3s infinite alternate;
    font-weight: 700;
    letter-spacing: 0.5px;
}


.subtitle {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: var(--text-light);
    font-weight: 600;
}


.progress-container {
    width: 100%;
    height: 12px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    margin: 20px 0;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
}


.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(to right, var(--accent), var(--warning));
    border-radius: 10px;
    transition: width 0.7s ease;
    box-shadow: 0 0 10px rgba(13, 202, 240, 0.7);
}


.content-area {
    background-color: var(--card-bg);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    min-height: 500px;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-dark);
}


.section {
    display: none;
    animation: fadeIn 0.8s ease;
}


.section.active {
    display: block;
}


h2 {
    font-size: 2.4rem;
    margin-bottom: 20px;
    color: var(--primary);
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
    font-weight: 700;
    letter-spacing: 0.5px;
}


h3 {
    font-size: 1.8rem;
    margin: 15px 0;
    color: var(--secondary);
    font-weight: 600;
}


p {
    font-size: 1.25rem;
    line-height: 1.7;
    margin-bottom: 15px;
    color: var(--text-dark);
}


.example-box {
    background: linear-gradient(135deg, rgba(61, 139, 242, 0.1), rgba(13, 110, 253, 0.1));
    border-radius: 15px;
    padding: 20px;
    margin: 20px 0;
    border-left: 5px solid var(--success);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    color: var(--text-dark);
}


.example-box:hover {
    transform: translateY(-5px);
}


.interactive-element {
    background: linear-gradient(to right, var(--accent), var(--secondary));
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    font-size: 1.1rem;
    cursor: pointer;
    margin: 10px 5px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(13, 202, 240, 0.4);
    font-weight: 600;
}


.interactive-element:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(13, 202, 240, 0.7);
}


.interactive-element:active {
    transform: translateY(1px);
}


.speech-button {
    background: linear-gradient(to right, var(--success), #2E8B57);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    margin: 5px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(25, 135, 84, 0.4);
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}


.speech-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(25, 135, 84, 0.7);
}


.speech-button.stop {
    background: linear-gradient(to right, #dc3545, #c82333);
}


.nav-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}


.visual-element {
    text-align: center;
    margin: 20px 0;
}


.algorithm-visualization {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    margin: 20px 0;
}


.step {
    background: linear-gradient(135deg, var(--secondary), var(--primary));
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 10px;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: white;
    cursor: pointer;
    font-weight: 700;
}


.step:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}


.algorithm-steps {
    margin: 15px 0;
    padding-left: 20px;
}


.algorithm-steps li {
    font-size: 1.2rem;
    margin-bottom: 10px;
    transition: color 0.3s ease;
    font-weight: 500;
}


.algorithm-steps li.highlight {
    color: var(--warning);
    font-weight: bold;
}


.block-code {
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    padding: 15px;
    font-family: 'Courier New', monospace;
    margin: 15px 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    border: 1px solid rgba(0, 0, 0, 0.1);
}


.block {
    background-color: var(--primary);
    padding: 10px 15px;
    border-radius: 8px;
    color: white;
    cursor: move;
    transition: all 0.3s ease;
    font-weight: 600;
}


.block:hover {
    transform: scale(1.05);
}


.block.blue { background-color: #2962ff; }
.block.green { background-color: var(--success); }
.block.yellow { background-color: var(--warning); color: var(--dark); }
.block.purple { background-color: #7B1FA2; }


.inclusion-message {
    background: linear-gradient(135deg, rgba(13, 202, 240, 0.1), rgba(13, 110, 253, 0.1));
    border-radius: 15px;
    padding: 15px;
    margin: 20px 0;
    border-left: 5px solid var(--accent);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    color: var(--text-dark);
}


.quiz-container {
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 20px;
    margin: 20px 0;
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--text-dark);
}


.quiz-question {
    margin-bottom: 15px;
    font-weight: bold;
    font-size: 1.3rem;
    color: var(--primary);
}


.quiz-option {
    background-color: rgba(255, 255, 255, 0.9);
    padding: 12px 15px;
    border-radius: 8px;
    margin: 8px 0;
    cursor: pointer;
    transition: background-color 0.3s;
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--text-dark);
    font-weight: 500;
}


.quiz-option:hover {
    background-color: rgba(61, 139, 242, 0.1);
}


.quiz-option.correct {
    background-color: rgba(25, 135, 84, 0.2);
    border-left: 5px solid var(--success);
}


.quiz-option.incorrect {
    background-color: rgba(220, 53, 69, 0.2);
    border-left: 5px solid #dc3545;
}


.image-container {
    text-align: center;
    margin: 20px 0;
}


.content-image {
    max-width: 90%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    border: 2px solid rgba(0, 0, 0, 0.1);
    transition: transform 0.5s ease;
}


.content-image:hover {
    transform: scale(1.05);
}


.explore-options {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin: 25px 0;
}


.explore-card {
    background: linear-gradient(135deg, rgba(61, 139, 242, 0.1), rgba(13, 110, 253, 0.1));
    border-radius: 15px;
    padding: 20px;
    width: 200px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--text-dark);
}


.explore-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}


.explore-card i {
    font-size: 2.5rem;
    margin-bottom: 10px;
    display: block;
}


.teacher-message {
    background: linear-gradient(135deg, rgba(253, 126, 20, 0.1), rgba(253, 126, 20, 0.1));
    border-radius: 15px;
    padding: 15px;
    margin: 20px 0;
    border-left: 5px solid var(--warning);
    position: relative;
    padding-left: 70px;
    color: var(--text-dark);
}


.teacher-message:before {
    content: "💡";
    position: absolute;
    left: 15px;
    top: 15px;
    font-size: 2rem;
}


@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}


@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}


@keyframes titleGlow {
    0% { text-shadow: 0 0 10px rgba(253, 126, 20, 0.5); }
    100% { text-shadow: 0 0 20px rgba(13, 202, 240, 0.7); }
}


.pulse {
    animation: pulse 2s infinite;
}


.mission-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent), var(--warning));
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin: 0 5px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    font-weight: 600;
}


.wiki-link {
    color: var(--secondary);
    text-decoration: none;
    font-weight: bold;
    border-bottom: 1px dotted var(--secondary);
    transition: all 0.3s ease;
}


.wiki-link:hover {
    color: var(--primary);
    border-bottom: 1px solid var(--primary);
}


.speech-controls {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 15px;
    gap: 10px;
    flex-wrap: wrap;
}


@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 2.0rem; }
    h3 { font-size: 1.6rem; }
    p { font-size: 1.15rem; }
    .content-area { padding: 20px; }
    .algorithm-visualization { justify-content: center; }
    .explore-card { width: 100%; }
    .content-image {
        max-width: 95%;
    }
    .nav-buttons {
        flex-direction: column;
        gap: 10px;
    }
    .nav-buttons button {
        width: 100%;
    }
    .speech-controls {
        justify-content: center;
    }
}


@media (max-width: 480px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.6rem; }
    .content-image {
        max-width: 100%;
    }
}


/* Stili per i modali */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.7);
    animation: fadeIn 0.3s;
}


.modal-content {
    background: var(--card-bg);
    margin: 5% auto;
    padding: 30px;
    border-radius: 20px;
    width: 85%;
    max-width: 800px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    color: var(--text-dark);
    font-size: 1.2rem;
    line-height: 1.6;
}


.modal-content h2 {
    color: var(--primary);
    margin-bottom: 20px;
    font-size: 2.2rem;
    text-align: center;
}


.modal-content p, .modal-content li {
    margin-bottom: 15px;
    font-size: 1.2rem;
}


.modal-content ul, .modal-content ol {
    margin-left: 20px;
    margin-bottom: 20px;
}


.close-modal {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 20px;
    top: 15px;
}


.close-modal:hover {
    color: var(--accent);
}


/* Stili per il menu delle lingue */
.language-menu {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin: 20px 0;
    padding: 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}


.language-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    font-weight: 500;
}


.language-option:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}


.language-option.current {
    background: linear-gradient(to right, var(--accent), var(--secondary));
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 10px rgba(13, 202, 240, 0.4);
}


.flag {
    font-size: 1.2rem;
}


.language-name {
    font-size: 0.9rem;
}


/* Media queries per il menu delle lingue */
@media (max-width: 768px) {
    .language-menu {
        gap: 5px;
    }
    
    .language-option {
        padding: 6px 10px;
    }
    
    .language-name {
        font-size: 0.8rem;
    }
}


@media (max-width: 480px) {
    .language-menu {
        flex-direction: column;
        align-items: center;
    }
    
    .language-option {
        width: 80%;
        justify-content: center;
    }
}