/* Base Styles and Reset */
:root {
    --primary-color: #4a6fa5;
    --secondary-color: #ff7e5f;
    --tertiary-color: #1abc9c;
    --background-color: #f8f9fa;
    --text-color: #333;
    --light-gray: #e9ecef;
    --medium-gray: #ced4da;
    --dark-gray: #6c757d;
    --success-color: #28a745;
    --error-color: #dc3545;
    --warning-color: #ffc107;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    padding-bottom: 60px;
    position: relative;
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
}

h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--tertiary-color);
    text-decoration: underline;
}

ul, ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

/* Layout Components */
header {
    background-color: white;
    padding: 2rem 1rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.tagline {
    color: var(--dark-gray);
    font-size: 1.1rem;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

section {
    margin-bottom: 3rem;
}

footer {
    text-align: center;
    padding: 1.5rem;
    background-color: var(--light-gray);
    color: var(--dark-gray);
    position: absolute;
    bottom: 0;
    width: 100%;
}

/* Buttons and CTAs */
.cta-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 2rem 0;
    justify-content: center;
}

.cta-button, button {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    text-align: center;
    transition: var(--transition);
    font-size: 1rem;
}

.cta-button:hover, button:hover {
    background-color: #3a5a84;
    transform: translateY(-2px);
    box-shadow: 0 6px 10px rgba(0, 0, 0, 0.1);
    text-decoration: none;
}

.cta-button.secondary {
    background-color: var(--secondary-color);
}

.cta-button.secondary:hover {
    background-color: #e66e50;
}

.reset-button {
    background-color: var(--error-color);
    margin-top: 1rem;
}

.reset-button:hover {
    background-color: #bd2130;
}

/* Module Cards */
.modules-overview {
    margin: 3rem 0;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.module-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 5px solid var(--primary-color);
}

.module-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.module-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.module-card h4 {
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.module-card p {
    color: var(--text-color);
    margin-bottom: 1.5rem;
}

.module-link {
    display: inline-block;
    width: 100%;
    padding: 0.6rem 0;
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
}

.module-link:hover {
    background-color: #3a5a84;
    text-decoration: none;
    color: white;
}

.module-link.disabled {
    background-color: var(--medium-gray);
    cursor: not-allowed;
    opacity: 0.7;
}

.module-card.locked {
    opacity: 0.8;
    border-top-color: var(--medium-gray);
}

.module-card.active {
    border-top-color: var(--tertiary-color);
}

.module-card.completed {
    border-top-color: var(--success-color);
}

/* Progress Bars */
.module-progress, .progress-container {
    margin-bottom: 1rem;
}

.progress-bar {
    height: 10px;
    background-color: var(--success-color);
    border-radius: 5px;
    margin-bottom: 0.5rem;
    width: 0%;
    transition: width 0.5s ease;
}

.progress-text {
    text-align: right;
    font-size: 0.9rem;
    color: var(--dark-gray);
}

.total-progress {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.total-progress .progress-container {
    max-width: 600px;
    margin: 1rem auto;
}

/* Help System */
.help-button {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    box-shadow: var(--shadow);
    cursor: pointer;
    z-index: 100;
    transition: var(--transition);
}

.help-button:hover, .help-button:focus {
    background-color: #3a5a84;
    transform: scale(1.1);
}

.help-panel {
    position: fixed;
    top: 0;
    right: -350px;
    width: 350px;
    height: 100vh;
    background-color: white;
    box-shadow: -3px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 200;
    transition: right 0.3s ease;
    overflow-y: auto;
}

.help-panel[aria-hidden="false"] {
    right: 0;
}

.help-header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close-help {
    font-size: 2rem;
    cursor: pointer;
    transition: var(--transition);
}

.close-help:hover {
    transform: scale(1.2);
}

.help-content {
    padding: 1.5rem;
}

.help-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.help-content ul {
    margin-bottom: 1.5rem;
}

/* Responsive Styles */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.6rem;
    }
    
    .modules-grid {
        grid-template-columns: 1fr;
    }
    
    .help-panel {
        width: 100%;
        right: -100%;
    }
}

/* Accessibility Enhancements */
:focus {
    outline: 3px solid var(--tertiary-color);
    outline-offset: 3px;
}

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

/* Skip to content link for keyboard users */
.skip-to-content {
    position: absolute;
    left: -9999px;
    z-index: 999;
    padding: 1em;
    background-color: white;
    color: var(--primary-color);
    text-decoration: none;
}

.skip-to-content:focus {
    left: 50%;
    transform: translateX(-50%);
    top: 0;
}

/* Fireworks Animation */
.fireworks {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0;
}

@keyframes firework-animation {
    0% { 
        opacity: 1;
        transform: scale(0);
    }
    80% { 
        opacity: 1;
    }
    100% { 
        opacity: 0;
        transform: scale(1);
    }
}

@keyframes firework-fade {
    0% { opacity: 1; }
    50% { opacity: 1; }
    100% { opacity: 0; }
}

.firework {
    position: absolute;
    border-radius: 50%;
    transform-origin: center;
    opacity: 0;
}

/* Basic Fireworks (0-25 points) */
.basic-firework {
    animation: firework-animation 0.8s ease-out forwards, firework-fade 0.8s ease-out forwards;
    background-color: var(--primary-color);
    box-shadow: 0 0 10px 2px var(--primary-color);
}

/* Enhanced Fireworks (26-50 points) */
.enhanced-firework {
    animation: firework-animation 0.8s ease-out forwards, firework-fade 0.8s ease-out forwards;
}

.enhanced-firework.color1 {
    background-color: var(--primary-color);
    box-shadow: 0 0 10px 2px var(--primary-color);
}

.enhanced-firework.color2 {
    background-color: var(--secondary-color);
    box-shadow: 0 0 10px 2px var(--secondary-color);
}

.enhanced-firework.color3 {
    background-color: var(--tertiary-color);
    box-shadow: 0 0 10px 2px var(--tertiary-color);
}

/* Advanced Fireworks (51-75 points) */
.advanced-firework {
    animation: firework-animation 1s cubic-bezier(0.22, 0.61, 0.36, 1) forwards, firework-fade 1s ease-out forwards;
}

.advanced-firework.color1 {
    background-color: #ff5e5e;
    box-shadow: 0 0 15px 3px #ff5e5e;
}

.advanced-firework.color2 {
    background-color: #5effff;
    box-shadow: 0 0 15px 3px #5effff;
}

.advanced-firework.color3 {
    background-color: #ffff5e;
    box-shadow: 0 0 15px 3px #ffff5e;
}

.advanced-firework.color4 {
    background-color: #ff5eff;
    box-shadow: 0 0 15px 3px #ff5eff;
}

.advanced-firework.color5 {
    background-color: #5eff5e;
    box-shadow: 0 0 15px 3px #5eff5e;
}

/* Spectacular Fireworks (76-100 points) */
.spectacular-firework {
    animation: firework-animation 1.2s cubic-bezier(0.22, 0.61, 0.36, 1) forwards, firework-fade 1.2s ease-out forwards;
}

.spectacular-firework.color1 {
    background-color: #ff5e5e;
    box-shadow: 0 0 20px 5px #ff5e5e;
}

.spectacular-firework.color2 {
    background-color: #5effff;
    box-shadow: 0 0 20px 5px #5effff;
}

.spectacular-firework.color3 {
    background-color: #ffff5e;
    box-shadow: 0 0 20px 5px #ffff5e;
}

.spectacular-firework.color4 {
    background-color: #ff5eff;
    box-shadow: 0 0 20px 5px #ff5eff;
}

.spectacular-firework.color5 {
    background-color: #5eff5e;
    box-shadow: 0 0 20px 5px #5eff5e;
}

.spectacular-firework.color6 {
    background-color: #5e5eff;
    box-shadow: 0 0 20px 5px #5e5eff;
}

.spectacular-firework.color7 {
    background-color: #ff9d5e;
    box-shadow: 0 0 20px 5px #ff9d5e;
}

/* RDF Triple Visualization Styles */
.triple {
    display: flex;
    flex-direction: column;
    margin: 2rem 0;
}

.triple-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.triple-element {
    padding: 1rem;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    width: 30%;
    transition: var(--transition);
}

.triple-element:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.triple-element.subject {
    background-color: #e1f5fe;
    border-left: 5px solid #4fc3f7;
}

.triple-element.predicate {
    background-color: #e8f5e9;
    border-left: 5px solid #66bb6a;
}

.triple-element.object {
    background-color: #fff8e1;
    border-left: 5px solid #ffd54f;
}

.triple-arrow {
    font-size: 1.5rem;
    color: var(--dark-gray);
}

/* Drag and Drop Exercise Styles */
.drag-container {
    margin: 2rem 0;
}

.drag-items {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.drag-item {
    padding: 0.75rem 1.5rem;
    background-color: white;
    border: 2px dashed var(--medium-gray);
    border-radius: var(--border-radius);
    cursor: move;
    user-select: none;
    transition: var(--transition);
}

.drag-item:hover {
    background-color: var(--light-gray);
}

.drag-targets {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 2rem;
}

.drag-target {
    width: 30%;
    min-height: 100px;
    padding: 1rem;
    border: 2px dashed var(--medium-gray);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    transition: var(--transition);
}

.drag-target.subject {
    background-color: rgba(225, 245, 254, 0.3);
}

.drag-target.predicate {
    background-color: rgba(232, 245, 233, 0.3);
}

.drag-target.object {
    background-color: rgba(255, 248, 225, 0.3);
}

.drag-target.highlight {
    background-color: var(--light-gray);
    border-color: var(--primary-color);
}

/* Form and Assessment Styles */
form {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin: 2rem 0;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

input[type="text"], 
select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.radio-group {
    margin-top: 0.5rem;
}

.radio-option {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
}

.radio-option input[type="radio"] {
    margin-right: 0.5rem;
}

button[type="submit"] {
    margin-top: 1rem;
}

.feedback {
    margin-top: 2rem;
    padding: 1rem;
    border-radius: var(--border-radius);
    font-weight: 600;
}

.feedback.success {
    background-color: #d4edda;
    color: #155724;
    border-left: 5px solid var(--success-color);
}

.feedback.error {
    background-color: #f8d7da;
    color: #721c24;
    border-left: 5px solid var(--error-color);
}

/* Quiz and exercise feedback classes used by JS */
.quiz-feedback,
.ontology-feedback,
.domain-range-feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--border-radius);
    font-weight: 600;
}

.quiz-feedback.success,
.ontology-feedback.success,
.domain-range-feedback.success {
    background-color: #d4edda;
    color: #155724;
    border-left: 5px solid var(--success-color);
}

.quiz-feedback.error,
.ontology-feedback.error,
.domain-range-feedback.error {
    background-color: #f8d7da;
    color: #721c24;
    border-left: 5px solid var(--error-color);
}

.quiz-feedback.partial,
.ontology-feedback.partial,
.domain-range-feedback.partial {
    background-color: #fff3cd;
    color: #856404;
    border-left: 5px solid #ffc107;
}

/* Drag target highlight state */
.drag-target.highlight {
    border-color: var(--primary-color);
    background-color: rgba(0, 124, 186, 0.1);
}

/* Correct/incorrect states for general elements */
.correct {
    border-color: var(--success-color) !important;
    background-color: rgba(40, 167, 69, 0.1) !important;
}

.incorrect {
    border-color: var(--error-color) !important;
    background-color: rgba(220, 53, 69, 0.1) !important;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 2.5rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 2.5rem; }

/* Module 2: RDF vs Tabular Data Styles */
.comparison-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 2rem 0;
}

.comparison-item {
    flex: 1;
    min-width: 300px;
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.comparison-item h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.use-case {
    border-left: 4px solid var(--tertiary-color);
}

.use-case h3 {
    color: var(--tertiary-color);
}

.table-container {
    overflow-x: auto;
    margin: 1rem 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

thead {
    background-color: var(--primary-color);
    color: white;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border: 1px solid var(--medium-gray);
}

tr:nth-child(even) {
    background-color: var(--light-gray);
}

.comparison-table table {
    margin: 1.5rem 0;
}

.comparison-table th:first-child {
    width: 20%;
}

.conversion-arrow {
    text-align: center;
    font-size: 2rem;
    margin: 1rem 0;
    color: var(--dark-gray);
}

.conversion-example {
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin: 2rem 0;
}

.conversion-example h4 {
    margin-top: 1rem;
    color: var(--primary-color);
}

.example-box {
    background-color: var(--light-gray);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-top: 1.5rem;
}

.example-box h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.exercise-container {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin: 2rem 0;
}

.exercise-container h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.matching-item {
    margin-bottom: 1.5rem;
}

.matching-item label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.matching-item select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.matching-item select.correct {
    border-color: var(--success-color);
    background-color: rgba(40, 167, 69, 0.1);
}

.matching-item select.incorrect {
    border-color: var(--error-color);
    background-color: rgba(220, 53, 69, 0.1);
}

.feedback {
    padding: 1rem;
    border-radius: var(--border-radius);
    font-weight: 600;
}

.feedback.success {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
}

.feedback.error {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--error-color);
}

.form-group {
    margin-bottom: 2rem;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    background-color: var(--light-gray);
}

.form-group p {
    font-weight: 600;
    margin-bottom: 1rem;
}

.radio-group {
    margin-left: 1rem;
}

.radio-option {
    margin-bottom: 0.5rem;
}

.radio-option input[type="radio"] {
    margin-right: 0.5rem;
}

.correct-answer {
    border-left: 4px solid var(--success-color);
    background-color: rgba(40, 167, 69, 0.1);
}

.incorrect-answer {
    border-left: 4px solid var(--error-color);
    background-color: rgba(220, 53, 69, 0.1);
}

.answer-explanation {
    margin-top: 1rem;
    padding: 0.5rem;
    background-color: white;
    border-radius: var(--border-radius);
    font-style: italic;
}

.note {
    font-size: 0.9rem;
    font-style: italic;
    color: var(--dark-gray);
    margin-top: 0.5rem;
}

/* mt-2 and mt-4 already defined in Utility Classes above - do not redefine */

/* Add to existing fireworks styling */
.fireworks.show {
    opacity: 1;
    pointer-events: none;
}

/* Celebration Firework Style - Consistent for all test completions */
.celebration-firework {
    animation: celebration-firework-animation 2.5s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
    background-color: var(--firework-color, #FF6B6B);
    box-shadow: 
        0 0 20px 5px var(--firework-color, #FF6B6B),
        0 0 40px 10px rgba(255, 107, 107, 0.4);
    border-radius: 50%;
}

@keyframes celebration-firework-animation {
    0% { 
        opacity: 1;
        transform: scale(0);
    }
    20% {
        opacity: 1;
        transform: scale(1);
    }
    80% { 
        opacity: 1;
        transform: scale(1.2);
    }
    100% { 
        opacity: 0;
        transform: scale(1.5);
    }
}

/* Add to existing progress styles */
.module-completion.completed h2::after {
    content: " ✓";
    color: var(--success-color);
}

/* Module 3: Ontology Styles */
.concept-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 25px 0;
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

@media (min-width: 768px) {
    .concept-container {
        flex-direction: row;
    }
    
    .concept-definition {
        flex: 3;
    }
    
    .concept-example, .example-box {
        flex: 2;
    }
}

.concept-definition {
    padding-right: 15px;
}

.concept-example, .example-box {
    background-color: #f0f7ff;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #007bff;
}

/* Example code */
.example-box code {
    white-space: pre-wrap;
    overflow-x: auto;
    display: block;
    padding: 10px;
    background-color: #f8f9fa;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
    color: #333;
    border: 1px solid #dee2e6;
}

/* Diagrams */
.diagram-container {
    margin: 30px 0;
}

.diagram {
    position: relative;
    min-height: 300px;
    background-color: #fcfcfc;
    border: 1px solid #eaeaea;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 10px;
}

.collection-diagram .diagram,
.concept-scheme-diagram .diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.collection-node, .scheme-node {
    background-color: #fff;
    border: 2px solid #5b7cc7;
    border-radius: 8px;
    padding: 10px 20px;
    margin: 10px auto;
    text-align: center;
    min-width: 200px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.collection-node h4, .scheme-node h4 {
    margin: 0 0 5px;
    color: #3a5a99;
}

.collection-node p, .scheme-node p {
    margin: 0;
    font-size: 0.9em;
    color: #666;
}

.member-nodes, .top-concepts, .narrower-concepts {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 40px;
    position: relative;
    width: 100%;
}

.concept-node {
    background-color: #fff;
    border: 2px solid #4ca66b;
    border-radius: 8px;
    padding: 10px;
    text-align: center;
    min-width: 120px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.concept-node h4 {
    margin: 0 0 5px;
    color: #2d7a4a;
    font-size: 0.95em;
}

.concept-node p {
    margin: 0;
    font-size: 0.8em;
    color: #666;
}

.diagram-arrow {
    position: absolute;
    top: -25px;
    background-color: #e9ecef;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.8em;
    color: #666;
    text-align: center;
    z-index: 2;
}

/* Specific arrow positioning for ontology diagram */
.down-arrow {
    position: relative;
    top: auto;
    margin: 10px auto;
    font-size: 24px;
    background-color: transparent;
    padding: 0;
}

.right-arrow {
    position: relative;
    top: auto;
    margin: 0 10px;
    font-size: 24px;
    background-color: transparent;
    padding: 0;
}

.member-arrow::before,
.top-concept-arrow::before,
.narrower-arrow::before {
    content: '';
    position: absolute;
    top: -15px;
    left: 50%;
    width: 2px;
    height: 40px;
    background-color: #aaa;
    transform: translateX(-50%);
    z-index: -1;
}

.diagram-caption {
    text-align: center;
    font-style: italic;
    color: #666;
    font-size: 0.9em;
    margin-top: 10px;
}

/* Interactive exercises */
.interactive-element {
    margin: 30px 0;
    padding: 20px;
    background-color: #eff8ff;
    border-radius: 8px;
    border: 1px solid #d0e3ff;
}

.interactive-element h3 {
    color: #2c5282;
    margin-top: 0;
}

/* Drag and drop exercise */
.drag-drop-exercise {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.concept-template {
    background-color: #f8f9fa;
    border-radius: 6px;
    padding: 15px;
    font-family: monospace;
    font-size: 1.1em;
    line-height: 1.6;
    margin-bottom: 20px;
    white-space: pre-wrap;
}

.drag-target {
    display: inline-block;
    min-width: 120px;
    padding: 5px;
    margin: 3px;
    background-color: #f0f7ff;
    border: 2px dashed #007bff;
    border-radius: 4px;
    text-align: center;
    cursor: pointer;
}

.drag-target.drag-hover {
    background-color: #e0edff;
    border-style: solid;
}

.drag-target.filled {
    border-style: solid;
}

.drag-target.correct-answer {
    background-color: #d4edda;
    border-color: #28a745;
    color: #155724;
}

.drag-target.incorrect-answer {
    background-color: #f8d7da;
    border-color: #dc3545;
    color: #721c24;
}

.drag-items-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 20px;
}

.drag-item {
    background-color: #f8f9fa;
    border: 2px solid #007bff;
    border-radius: 4px;
    padding: 8px 12px;
    text-align: center;
    cursor: grab;
    transition: all 0.2s ease;
}

.drag-item:hover {
    background-color: #e0edff;
}

.drag-item.dragging {
    opacity: 0.7;
}

/* Collection builder */
.collection-builder-exercise {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.collection-template {
    margin-bottom: 20px;
}

.collection-template h4 {
    color: #b45309;
    margin-top: 0;
}

.collection-box {
    min-height: 150px;
    padding: 15px;
    background-color: #fff9e6;
    border: 2px dashed #d97706;
    border-radius: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-content: flex-start;
}

.collection-box .instruction {
    width: 100%;
    text-align: center;
    color: #92400e;
    font-style: italic;
}

.collection-box.drag-hover {
    background-color: #ffefcf;
    border-style: solid;
}

.available-concepts {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 10px;
    margin: 20px 0;
}

.concept-item {
    background-color: #f8f9fa;
    border: 2px solid #059669;
    border-radius: 4px;
    padding: 8px 12px;
    text-align: center;
    cursor: grab;
    transition: all 0.2s ease;
}

.concept-item:hover {
    background-color: #ecfdf5;
}

.concept-item.dragging {
    opacity: 0.7;
}

.collection-item {
    background-color: #fff;
    border-radius: 4px;
    padding: 8px 30px 8px 12px;
    position: relative;
    display: inline-block;
    margin: 5px;
}

.collection-item.weather {
    border-left: 4px solid #059669;
}

.collection-item.astronomy {
    border-left: 4px solid #6366f1;
}

.collection-item.geology {
    border-left: 4px solid #a21caf;
}

.collection-item.correct-answer {
    background-color: #ecfdf5;
}

.collection-item.incorrect-answer {
    background-color: #fef2f2;
}

/* Enhanced collection item styles for drag and drop */
.collection-members-box .collection-item {
    display: inline-block;
    padding: 8px 12px;
    margin: 5px;
    background-color: #e3f2fd;
    border: 1px solid #90caf9;
    border-radius: 4px;
    cursor: move;
    transition: all 0.2s ease;
}

.collection-members-box .collection-item:hover {
    background-color: #bbdefb;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.collection-members-box .collection-item.dragging {
    opacity: 0.5;
    transform: rotate(5deg);
}

.collection-members-box .collection-item.correct-answer {
    background-color: #e8f5e8;
    border-color: #4caf50;
}

.collection-members-box .collection-item.incorrect-answer {
    background-color: #ffeaea;
    border-color: #f44336;
}

.remove-item {
    position: absolute;
    top: 50%;
    right: 6px;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    line-height: 16px;
    text-align: center;
    background-color: #fee2e2;
    color: #b91c1c;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
}

.remove-item:hover {
    background-color: #fecaca;
}

/* Quiz styles */
.quiz-container {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.quiz-question {
    margin-bottom: 20px;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 6px;
}

.quiz-question p {
    font-weight: bold;
    margin-top: 0;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 15px;
}

.quiz-options .option {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    background-color: #fff;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.quiz-options .option:hover {
    background-color: #f9fafb;
}

.quiz-options .option.correct-answer {
    background-color: #d1fae5;
    border-color: #059669;
}

.quiz-options .option.incorrect-answer {
    background-color: #fee2e2;
    border-color: #dc2626;
}

.quiz-options input[type="radio"] {
    margin-right: 10px;
}

/* Observation vocabulary exercise */
.observation-template {
    background-color: #f8f9fa;
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 20px;
}

.observation-template pre {
    margin: 0;
    overflow-x: auto;
    white-space: pre-wrap;
    font-family: monospace;
    font-size: 1em;
    line-height: 1.6;
}

.fill-blank {
    display: inline-block;
    min-width: 180px;
    padding: 5px 10px;
    background-color: #f0f7ff;
    border: 2px dashed #3b82f6;
    border-radius: 4px;
    text-align: center;
    color: #1e40af;
    font-weight: bold;
}

.fill-blank.filled {
    border-style: solid;
}

.options-container {
    margin: 20px 0;
}

.options-container h4 {
    margin-top: 0;
    color: #4b5563;
}

.options-group {
    margin-bottom: 20px;
}

.options-group h5 {
    color: #4b5563;
    margin-bottom: 10px;
    padding-bottom: 5px;
    border-bottom: 1px solid #e5e7eb;
}

.option-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.option-button {
    background-color: #fff;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    padding: 8px 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: monospace;
}

.option-button:hover {
    background-color: #f9fafb;
    border-color: #9ca3af;
}

.option-button.selected {
    background-color: #dbeafe;
    border-color: #3b82f6;
    color: #1e40af;
    font-weight: bold;
}

/* Button and feedback styles */
.check-answer-btn {
    display: inline-block;
    background-color: #3b82f6;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 10px 20px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-top: 20px;
}

.check-answer-btn:hover {
    background-color: #2563eb;
}

.feedback-message {
    margin-top: 15px;
    padding: 10px 15px;
    border-radius: 4px;
    font-weight: bold;
}

.feedback-message.success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.feedback-message.error {
    background-color: #fee2e2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

.feedback-message.partial {
    background-color: #fff7ed;
    color: #9a3412;
    border: 1px solid #fed7aa;
}

/* Comparison table */
.comparison-container {
    margin: 20px 0;
}

.comparison-table {
    width: 100%;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin: 1.5rem 0;
    overflow: hidden;
    display: table;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1); /* Add subtle shadow */
}

.comparison-row {
    display: table-row;
}

.comparison-row.header {
    background-color: #3a5a84; /* Darker shade of the primary color */
    color: white !important; /* Force white color */
    font-weight: bold;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.5); /* Add text shadow for better readability */
}

/* Ensure header text is visible regardless of background */
.comparison-row.header .comparison-cell {
    color: white !important; /* Force white color with !important */
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.comparison-row:not(.header) .comparison-cell {
    color: var(--text-color) !important; /* Ensure non-header text uses the default text color */
    background-color: white; /* Ensure background is white for content cells */
}

.comparison-row:nth-child(even):not(.header) {
    background-color: #f5f5f5;
}

.comparison-row:nth-child(even):not(.header) .comparison-cell {
    background-color: #f5f5f5; /* Ensure background color applies to cells */
}

.comparison-cell {
    display: table-cell;
    padding: 15px 20px; /* Increased padding */
    border-bottom: 1px solid #ddd;
    vertical-align: top; /* Align content to top */
}

/* Specific widths for three-column format comparison table */
.formats-comparison .comparison-cell:nth-child(1) {
    width: 15%; /* Format name column - narrow */
}

.formats-comparison .comparison-cell:nth-child(2) {
    width: 60%; /* Representation code column - wide */
    overflow-x: auto; /* Allow horizontal scrolling for long code */
}

.formats-comparison .comparison-cell:nth-child(3) {
    width: 25%; /* Characteristics column - medium */
}

/* Additional styles for proper cell alignment */
.comparison-cell ul {
    margin: 0;
    padding-left: 20px;
}

.comparison-cell ul li {
    margin-bottom: 8px; /* Increased spacing between list items */
}

.comparison-row:last-child .comparison-cell {
    border-bottom: none;
}

/* Three-column comparison table */
.comparison-table .comparison-row.three-column {
    grid-template-columns: 1fr 1fr 1fr;
}

.comparison-table .comparison-row.three-column.full-width {
    grid-template-columns: 1fr 2fr 2fr;
}

/* SKOS Components */
.skos-component {
    background-color: #f8f9fa;
    border-radius: 8px;
    padding: 15px;
    margin: 15px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.concept-scheme {
    border-left: 5px solid #3b82f6;
}

.concept {
    border-left: 5px solid #10b981;
}

.collection {
    border-left: 5px solid #f59e0b;
}

.component-example {
    margin-top: 10px;
    font-size: 0.9em;
    color: #6b7280;
    font-style: italic;
}

/* Make fireworks visible when active */
.fireworks.active {
    display: block;
}

/* Module 4: Controlled Vocabularies */
.concept-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
}

.concept-definition {
    flex: 1 1 60%;
    min-width: 300px;
}

.example-box {
    flex: 1 1 35%;
    min-width: 300px;
    background-color: #f5f5f5;
    border-left: 4px solid #4a6fa5;
    padding: 15px;
    border-radius: 0 4px 4px 0;
}

.note-box {
    background-color: #fffde7;
    border-left: 4px solid #ffd54f;
    padding: 15px;
    margin: 20px 0;
    border-radius: 0 4px 4px 0;
}

.diagram-container {
    margin: 30px 0;
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.skos-diagram, .scheme-diagram, .collection-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

.concept-node, .scheme-node, .collection-node {
    padding: 10px 15px;
    margin: 10px;
    border-radius: 8px;
    min-width: 200px;
    text-align: center;
}

.concept-node {
    background-color: #e3f2fd;
    border: 2px solid #1976d2;
}

.concept-node.smaller {
    min-width: 150px;
    font-size: 0.9em;
}

.scheme-node {
    background-color: #e8f5e9;
    border: 2px solid #43a047;
}

.collection-node {
    background-color: #fff3e0;
    border: 2px solid #ff9800;
}

.node-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.node-details {
    font-size: 0.85em;
    margin-top: 5px;
}

.concept-label {
    font-style: italic;
    color: #666;
    font-size: 0.9em;
    margin-top: 5px;
}

.relationship-arrow {
    display: flex;
    justify-content: center;
    align-items: center;
    font-style: italic;
    color: #666;
    position: relative;
    padding: 10px;
}

.relationship-arrow.down::after {
    content: "↓";
    display: block;
    font-size: 20px;
    margin-left: 5px;
}

.relationship-arrow.down.split::after {
    content: "⇓";
    display: block;
    font-size: 20px;
    margin-left: 5px;
}

.relationship-arrow.down.split-four::after {
    content: "⇓";
    display: block;
    font-size: 24px;
    margin-left: 5px;
}

.concept-children, .scheme-top-concepts, .scheme-subconcepts, .collection-members {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

/* Interactive Elements */
.interactive-element {
    background-color: #f0f7ff;
    border: 1px solid #d0e3ff;
    border-radius: 8px;
    padding: 20px;
    margin: 30px 0;
}

.matching-exercise {
    margin-top: 15px;
}

.matching-item {
    margin-bottom: 15px;
    padding: 10px;
    border-radius: 4px;
    background-color: #fff;
}

.term {
    font-weight: bold;
    display: inline-block;
    width: 150px;
    margin-right: 15px;
}

.matching-item select {
    width: calc(100% - 170px);
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.correct-answer {
    background-color: rgba(76, 175, 80, 0.1);
    border: 1px solid #4CAF50;
}

.incorrect-answer {
    background-color: rgba(244, 67, 54, 0.1);
    border: 1px solid #f44336;
}

.feedback-message {
    margin-top: 15px;
    padding: 10px;
    border-radius: 4px;
    display: none;
}

.feedback-message.success {
    display: block;
    background-color: #e8f5e9;
    border-left: 4px solid #4CAF50;
    color: #2e7d32;
}

.feedback-message.error {
    display: block;
    background-color: #ffebee;
    border-left: 4px solid #f44336;
    color: #c62828;
}

.feedback-message.partial {
    display: block;
    background-color: #fff8e1;
    border-left: 4px solid #ffc107;
    color: #ff8f00;
}

.check-button, .reset-button {
    margin-top: 10px;
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.check-button {
    background-color: #4a6fa5;
    color: white;
}

.reset-button {
    background-color: #f5f5f5;
    color: #333;
    margin-left: 10px;
}

.check-button:hover {
    background-color: #3a5985;
}

.reset-button:hover {
    background-color: #e0e0e0;
}

.check-button:disabled {
    background-color: #9e9e9e;
    cursor: not-allowed;
}

/* Drag and Drop */
.collection-builder-exercise {
    margin-top: 20px;
}

.drag-drop-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 15px;
}

.drag-options {
    flex: 1 1 30%;
    min-width: 200px;
    padding: 15px;
    background-color: #f5f5f5;
    border-radius: 8px;
}

.code-template {
    flex: 2 1 60%;
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    overflow-x: auto;
}

.drag-item {
    padding: 8px 12px;
    margin-bottom: 10px;
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 4px;
    cursor: move;
}

.drag-item.dragging {
    opacity: 0.5;
}

.drop-zone {
    display: inline-block;
    min-width: 150px;
    min-height: 24px;
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    margin: 0 5px;
    border: 1px dashed #666;
}

.drop-zone.drag-over {
    background-color: rgba(74, 111, 165, 0.2);
    border: 1px dashed #4a6fa5;
}

.dropped-item {
    display: inline-block;
    padding: 2px 5px;
    background-color: #e3f2fd;
    border-radius: 4px;
    cursor: pointer;
}

.dropped-item.correct-type {
    background-color: #e8f5e9;
}

.dropped-item.incorrect-type {
    background-color: #ffebee;
}

/* Collection Builder */
.collection-container {
    flex: 2 1 60%;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
}

.collection-header {
    padding: 10px 15px;
    background-color: #f5f5f5;
    border-bottom: 1px solid #e0e0e0;
}

.collection-body {
    padding: 15px;
    background-color: #fff;
}

.collection-prefix {
    margin-bottom: 10px;
    font-family: monospace;
}

.collection-members-box {
    min-height: 150px;
    padding: 10px;
    background-color: #f8f9fa;
    border: 1px dashed #ccc;
    border-radius: 4px;
}

.collection-members-box.drag-over {
    background-color: rgba(74, 111, 165, 0.1);
    border: 1px dashed #4a6fa5;
}

/* True/False Exercise */
.true-false-exercise {
    margin-top: 15px;
}

.exercise-item {
    margin-bottom: 10px;
    padding: 10px;
    border-radius: 4px;
    background-color: #fff;
    display: flex;
    align-items: center;
    gap: 10px;
}

.exercise-item input[type="checkbox"] {
    margin: 0;
    flex-shrink: 0;
}

.exercise-item label {
    flex: 1;
    margin: 0;
    cursor: pointer;
}

.exercise-item.correct-answer {
    background-color: #e8f5e8;
    border: 1px solid #4caf50;
}

.exercise-item.incorrect-answer {
    background-color: #ffeaea;
    border: 1px solid #f44336;
}

/* Quiz Styles */
.radio-quiz {
    margin-top: 15px;
}

.quiz-item {
    margin-bottom: 15px;
    padding: 15px;
    background-color: #fff;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.radio-options {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 10px;
    align-items: center;
}

.radio-options input[type="radio"] {
    margin: 0;
    margin-right: 6px;
    vertical-align: middle;
}

.radio-options label {
    margin: 0;
    cursor: pointer;
    display: inline-block;
    line-height: 1;
    vertical-align: middle;
}

/* Observer Vocabulary Exercise */
.button-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.option-button {
    padding: 8px 12px;
    background-color: #ffffff;
    border: 1px solid #4a6fa5;
    border-radius: 4px;
    cursor: pointer;
    color: #2c4a73;
    font-weight: 500;
}

.option-button:hover {
    background-color: #f0f6ff;
    border-color: #2c4a73;
}

.option-button.selected {
    background-color: #e3f2fd;
    border-color: #4a6fa5;
}

.selected-value {
    margin-top: 10px;
    padding: 8px 12px;
    background-color: #f8f9fa;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    min-height: 20px;
}

/* Comparison Table */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.comparison-row {
    display: flex;
    border-bottom: 1px solid #e0e0e0;
}

.comparison-row.header {
    background-color: #2c4a73;
    color: #ffffff;
    font-weight: bold;
}

.comparison-row.header .comparison-cell {
    color: #ffffff;
}

.comparison-row.header .comparison-cell:first-child {
    background-color: #2c4a73;
    color: #ffffff;
}

.comparison-cell {
    flex: 1;
    padding: 12px 15px;
    border-right: 1px solid #e0e0e0;
}

.comparison-cell:first-child {
    flex: 0 0 150px;
    background-color: #f9f9f9;
}

.comparison-cell:last-child {
    border-right: none;
}

/* Fireworks Animation */
.fireworks-container {
    position: relative;
    height: 200px;
    margin: 20px 0;
    overflow: hidden;
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 8px;
}

.firework {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    animation: explode 1s ease-out forwards;
}

.firework-circle {
    animation: explode-circle 1s ease-out forwards;
}

.firework-star {
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
    animation: explode-star 1s ease-out forwards;
}

.firework-burst {
    animation: explode-burst 1s ease-out forwards;
}

@keyframes explode {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(10);
        opacity: 0;
    }
}

@keyframes explode-circle {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(8);
        opacity: 0;
    }
}

@keyframes explode-star {
    0% {
        transform: scale(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: scale(6) rotate(45deg);
        opacity: 0;
    }
}

@keyframes explode-burst {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    50% {
        transform: scale(6);
        opacity: 0.5;
    }
    100% {
        transform: scale(10);
        opacity: 0;
    }
}

/* Completion Styles */
.completion-message {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(255, 255, 255, 0.95);
    border: 3px solid #4caf50;
    border-radius: 10px;
    padding: 20px 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    z-index: 100;
    text-align: center;
    animation: fadeIn 0.5s ease-in-out;
}

.completion-message h2 {
    color: #4caf50;
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 1.8em;
}

.completion-message p {
    font-size: 1.2em;
    margin-bottom: 0;
}

.close-completion {
    position: absolute;
    top: 10px;
    right: 15px;
    background: none;
    border: none;
    font-size: 2em;
    color: #666;
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.close-completion:hover {
    background-color: rgba(0, 0, 0, 0.1);
    color: #333;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -60%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

.completion-nav {
    justify-content: space-between;
}

.cta-button.disabled {
    background-color: #e0e0e0;
    color: #9e9e9e;
    cursor: not-allowed;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .concept-container {
        flex-direction: column;
    }
    
    .drag-drop-container {
        flex-direction: column;
    }
    
    .concept-children, .scheme-top-concepts, .scheme-subconcepts, .collection-members {
        flex-direction: column;
        align-items: center;
    }
    
    .comparison-row {
        flex-direction: column;
    }
    
    .comparison-cell {
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
    }
    
    .radio-options {
        flex-direction: column;
        gap: 5px;
    }
}

/* Fix for vocabulary benefits table */
.vocabulary-benefits-table .comparison-cell:first-child {
    flex: 1 !important;
    background-color: transparent !important;
}

.vocabulary-benefits-table .comparison-cell {
    flex: 1 !important;
}

/* Concept builder drag and drop improvements */
.drag-options.drag-hover {
    background-color: #e3f2fd;
    border: 2px dashed #1976d2;
    border-radius: 8px;
}

.drop-zone.drag-hover {
    background-color: #e8f5e9;
    border: 2px dashed #43a047;
    border-radius: 4px;
}

.drag-item.filled {
    background-color: #c8e6c9;
    border: 1px solid #4caf50;
    cursor: move;
}

.drag-item.dragging {
    opacity: 0.5;
    transform: rotate(5deg);
}

.drop-zone {
    min-height: 30px;
    display: inline-block;
    padding: 4px 8px;
    border: 1px dashed #ccc;
    border-radius: 4px;
    background-color: #f9f9f9;
    transition: all 0.3s ease;
}

.drop-zone.filled {
    border: 1px solid #4caf50;
    background-color: #e8f5e9;
}

/* Accessibility */
.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;
}

/* Module 5: RDF Serialization Formats */
.formats-comparison {
    margin-bottom: 30px;
}

.format-identification {
    margin-top: 20px;
}

.format-example {
    margin-bottom: 25px;
    padding: 15px;
    background-color: #f9f9f9;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.format-example pre {
    padding: 15px;
    background-color: #f1f1f1;
    border-radius: 4px;
    overflow-x: auto;
    font-size: 0.9em;
    margin-bottom: 15px;
}

.format-selection {
    display: flex;
    align-items: center;
    margin-top: 10px;
}

.format-selection label {
    font-weight: bold;
    margin-right: 10px;
    min-width: 60px;
}

.format-selection select {
    flex: 1;
    max-width: 200px;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.triple-parser-exercise {
    margin-top: 20px;
    padding: 20px;
    background-color: #f5f5f5;
    border-radius: 8px;
}

.triple-components {
    margin-top: 15px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.component-question {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.component-question label {
    font-weight: bold;
    min-width: 80px;
}

.component-question input[type="text"] {
    flex: 1;
    min-width: 250px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.component-question input.correct-answer {
    border-color: #4CAF50;
    background-color: rgba(76, 175, 80, 0.1);
}

.component-question input.incorrect-answer {
    border-color: #f44336;
    background-color: rgba(244, 67, 54, 0.1);
}

.scenario-questions {
    margin-top: 20px;
}

.scenario-question {
    margin-bottom: 20px;
    padding: 15px;
    background-color: #fff;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

.drop-targets {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 15px;
}

.drop-target-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.drop-target {
    width: 100px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f0f0f0;
    border: 1px dashed #aaa;
    border-radius: 4px;
}

/* Fix styling for drag items when placed in drop targets */
.drop-target .drag-item {
    margin: 0;
    margin-bottom: 0;
    padding: 4px 8px;
    font-size: 0.9rem;
    width: auto;
    height: auto;
    min-height: auto;
    display: inline-block;
    background-color: #4a6fa5;
    color: white;
    border: 1px solid #3a5a84;
    border-radius: 3px;
    cursor: move;
}

.drop-target .drag-item:hover {
    background-color: #3a5a84;
}

/* Visual feedback for correct/incorrect answers */
.drop-target.correct-drop {
    background-color: #e8f5e8;
    border: 2px solid #4caf50;
}

.drop-target.incorrect-drop {
    background-color: #ffeaea;
    border: 2px solid #f44336;
}

/* Visual feedback during drag operations */
.drop-target.drag-over {
    background-color: #e3f2fd;
    border: 2px dashed #2196f3;
}

.drop-description {
    flex: 1;
}

@media (max-width: 768px) {
    .format-selection {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .format-selection select {
        max-width: 100%;
        width: 100%;
        margin-top: 5px;
    }
    
    .component-question {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .component-question input[type="text"] {
        width: 100%;
    }
    
    .drop-target-container {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .drop-target {
        width: 100%;
    }
}

/* SPARQL Module (Module 6) Styles */
.sparql-container {
    margin: 2rem 0;
    padding: 1.5rem;
    border-radius: 8px;
    background-color: #f9f9f9;
}

.query-example {
    background-color: #f5f5f5;
    padding: 1rem;
    border-radius: 6px;
    border-left: 4px solid #3498db;
    margin: 1rem 0;
    overflow-x: auto;
}

.query-example pre {
    font-family: 'Courier New', monospace;
    line-height: 1.4;
    font-size: 0.9rem;
    margin: 0;
    white-space: pre-wrap;
}

.query-builder-exercise {
    margin: 1.5rem 0;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 1rem;
    background-color: #fff;
}

.code-template {
    background-color: #f8f8f8;
    padding: 1rem;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    margin-bottom: 1rem;
    position: relative;
}

.code-template pre {
    margin: 0;
    line-height: 1.5;
    font-size: 0.9rem;
    white-space: pre-wrap;
    word-break: break-all;
}

.blank-field {
    display: inline-block;
    min-width: 60px;
    padding: 0.2rem 0.5rem;
    margin: 0 0.2rem;
    background-color: #f0f0f0;
    border: 1px dashed #999;
    border-radius: 4px;
    color: #666;
    text-align: center;
}

.blank-field.filled {
    background-color: #e8f4fd;
    border: 1px solid #4a90e2;
    color: #333;
}

.option-choices,
.option-selections {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}

.option-group {
    flex: 1;
    min-width: 250px;
}

.option-group h4 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-size: 1rem;
    color: #444;
}

.option-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.option-button {
    padding: 0.5rem 1rem;
    background-color: #f0f0f0;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    font-family: 'Courier New', monospace;
    transition: all 0.2s;
}

.option-button:hover {
    background-color: #e0e0e0;
}

.option-button.selected {
    background-color: #4a90e2;
    color: white;
    border-color: #3a80d2;
}

.drop-zone {
    display: inline-block;
    min-width: 80px;
    min-height: 1.5rem;
    padding: 0.2rem 0.4rem;
    margin: 0 0.2rem;
    background-color: #f8f8f8;
    border: 2px dashed #ccc;
    border-radius: 4px;
    vertical-align: middle;
}

.drop-zone.drag-hover {
    background-color: #e8f4fd;
    border-color: #4a90e2;
}

.dropped-item {
    background-color: #e8f4fd;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    cursor: pointer;
    color: #333;
}

.dropped-item.correct-answer {
    background-color: #dff0d8;
    border: 1px solid #5cb85c;
    color: #3c763d;
}

.dropped-item.incorrect-answer {
    background-color: #f2dede;
    border: 1px solid #d9534f;
    color: #a94442;
}

.drag-items-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 1rem;
    background-color: #f0f0f0;
    border-radius: 6px;
}

.drag-item {
    padding: 0.5rem 1rem;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: move;
    font-family: 'Courier New', monospace;
    user-select: none;
}

.drag-item.dragging {
    opacity: 0.5;
}

.query-analysis-exercise {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    background-color: #fff;
}

.radio-question {
    margin-top: 1rem;
}

.radio-question p {
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.radio-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

@media (max-width: 768px) {
    .option-choices,
    .option-selections {
        flex-direction: column;
    }
    
    .option-group {
        width: 100%;
    }
    
    .drag-items-container {
        flex-direction: column;
    }
    
    .drag-item {
        width: 100%;
        box-sizing: border-box;
    }
    
    .code-template pre {
        font-size: 0.8rem;
    }
}

/* Module 7 - SHACL Shapes Styles */
.shacl-example {
    background-color: #f5f5ff;
    border: 1px solid #d5d5ff;
    border-radius: 5px;
    padding: 15px;
    margin: 20px 0;
    font-family: monospace;
    white-space: pre-wrap;
}

.shacl-diagram {
    display: block;
    max-width: 100%;
    margin: 20px auto;
    padding: 10px;
    background-color: #f9f9f9;
    border-radius: 5px;
}

.drag-drop-exercise {
    margin: 20px 0;
    padding: 15px;
    background-color: #f5f9ff;
    border-radius: 5px;
    border: 1px solid #d0e1ff;
}

.drag-drop-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

.drag-items {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 25px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
    min-height: 60px;
}

.drag-items.drag-hover {
    background-color: #e8f4fd;
    border-color: #2196f3;
    border-style: solid;
}

.drag-item {
    display: inline-block;
    padding: 12px 16px;
    background-color: #6c757d;
    color: white;
    border-radius: 6px;
    cursor: move;
    user-select: none;
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.drag-item:hover {
    background-color: #5a6268;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.drag-item.dragging {
    opacity: 0.5;
    transform: rotate(5deg);
}

.drop-zones {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 20px;
    margin-top: 20px;
}

.drop-zone {
    min-height: 50px;
    padding: 15px;
    background-color: #f8f9fa;
    border: 2px dashed #dee2e6;
    border-radius: 8px;
    position: relative;
    margin-top: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.drop-zone::before {
    content: attr(data-label);
    position: absolute;
    top: -25px;
    left: 0;
    font-size: 0.9em;
    color: #495057;
    font-weight: 600;
    background-color: white;
    padding: 2px 8px;
    border-radius: 4px;
}

.drop-zone.drag-hover {
    background-color: #e3f2fd;
    border-color: #2196f3;
    border-style: solid;
    transform: scale(1.02);
    box-shadow: 0 4px 8px rgba(33, 150, 243, 0.2);
}

.dropped-item {
    background-color: #2196f3;
    color: white;
    padding: 10px 16px;
    border-radius: 6px;
    display: inline-block;
    margin: 2px;
    cursor: pointer;
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Removed the × symbol since items can be dragged back */

.dropped-item.correct-answer {
    background-color: #4caf50;
}

.dropped-item.incorrect-answer {
    background-color: #f44336;
}

.exercise-buttons {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.feedback-message {
    margin-top: 15px;
    padding: 10px;
    border-radius: 4px;
}

.feedback-message.success {
    background-color: #e8f5e9;
    border: 1px solid #c8e6c9;
    color: #2e7d32;
}

.feedback-message.error {
    background-color: #ffebee;
    border: 1px solid #ffcdd2;
    color: #c62828;
}

.shape-builder {
    background-color: #f0f7ff;
    padding: 15px;
    border-radius: 5px;
    margin: 20px 0;
}

.shape-code {
    background-color: #f5f5f5;
    padding: 15px;
    border-radius: 4px;
    font-family: monospace;
    white-space: pre-wrap;
    margin: 15px 0;
    position: relative;
}

.option-selections {
    margin: 15px 0;
}

.option-group {
    margin-bottom: 10px;
}

.option-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.option-group select {
    width: 100%;
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #ccc;
}

.shape-field {
    display: inline-block;
    padding: 2px 6px;
    background-color: #e6e6e6;
    border-radius: 3px;
    min-width: 60px;
    text-align: center;
}

.shape-field.filled {
    background-color: #d1ecf1;
    border: 1px solid #bee5eb;
}

.scenario {
    background-color: #f9f9f9;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 15px;
}

.scenario h4 {
    margin-top: 0;
}

.scenario-options {
    margin-top: 10px;
}

.scenario-options label {
    display: block;
    margin: 5px 0;
}

@media (max-width: 768px) {
    .drag-items, .drop-zones {
        grid-template-columns: 1fr;
    }
    
    .exercise-buttons {
        flex-direction: column;
    }
}

/* Ontology diagram node styles */
.diagram-node {
    background-color: #fff;
    border-radius: 8px;
    padding: 15px;
    margin: 10px;
    text-align: center;
    min-width: 180px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.diagram-node h4 {
    margin: 0 0 8px 0;
    font-size: 1.1em;
}

.diagram-node p {
    margin: 0;
    font-size: 0.9em;
    color: #666;
}

.class-node {
    border: 2px solid #4285f4;
    background-color: #e8f0fe;
}

.instance-node {
    border: 2px solid #34a853;
    background-color: #e6f4ea;
}

.property-node {
    border: 2px solid #fbbc05;
    background-color: #fef7e0;
}

/* Make the ontology diagram flex to properly align elements */
.ontology-diagram .diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* For horizontal relationship between instance and property */
.ontology-diagram .diagram > div:nth-child(4) {
    align-self: flex-start;
    margin-left: 50px;
}

.ontology-diagram .diagram > div:nth-child(5) {
    align-self: flex-start;
    margin-left: 50px;
}

.member-arrow::before,
.top-concept-arrow::before,
.narrower-arrow::before {
    content: '';
    position: absolute;
    top: -15px;
    left: 50%;
    width: 2px;
    height: 40px;
    background-color: #aaa;
    transform: translateX(-50%);
    z-index: -1;
} 

@media (max-width: 768px) {
    .comparison-row {
        display: flex;
        flex-direction: column;
    }
    
    .comparison-cell {
        width: 100%;
        display: block;
        border-bottom: 1px solid #ddd;
    }
    
    .comparison-cell:last-child {
        margin-top: 10px;
    }
    
    .comparison-row.header .comparison-cell {
        border-bottom: none;
    }
    
    .comparison-row.header .comparison-cell:first-child {
        border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    }
}

/* Module Navigation */
.module-navigation {
    margin-top: 3rem;
    padding: 2rem 0;
    border-top: 2px solid var(--light-gray);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.nav-container .cta-button {
    flex: 1;
    min-width: 200px;
    text-align: center;
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
    }
    
    .nav-container .cta-button {
        width: 100%;
        min-width: auto;
    }
}