body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1em 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

nav ul {
    padding: 0;
    list-style: none;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
}

main {
    padding: 20px;
}

section {
    background-color: #fff;
    margin-bottom: 20px;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #333;
    color: #fff;
    position: relative;
    bottom: 0;
    width: 100%;
}



.code-examples-container {
    margin-top: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
}

.tab-buttons {
    display: flex;
    background-color: #eee;
    border-bottom: 1px solid #ddd;
}

.tab-button {
    flex: 1;
    padding: 10px 15px;
    border: none;
    background-color: #eee;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s ease;
}

.tab-button:hover {
    background-color: #ddd;
}

.tab-button.active {
    background-color: #fff;
    border-bottom: 2px solid #333;
}

.code-tab {
    display: none;
    padding: 15px;
    background-color: #fff;
}

.code-tab.active {
    display: block;
}

pre {
    background-color: #f8f8f8;
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
}

code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
}



/* Enhanced styling for content sections */
.content-section {
    margin-bottom: 30px;
}

.content-section h3 {
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 5px;
    margin-bottom: 15px;
}

/* Operations grid for strings */
.operations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin: 20px 0;
}

.operation-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
}

.operation-card:hover {
    transform: translateY(-5px);
}

.operation-card h4 {
    margin: 0 0 10px 0;
    font-size: 1.2em;
}

.operation-card p {
    margin: 0;
    font-size: 0.9em;
}

/* Characteristics grid for vectors and matrices */
.characteristics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
    margin: 20px 0;
}

.characteristic-card {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s ease;
}

.characteristic-card:hover {
    transform: translateY(-3px);
}

.characteristic-card h4 {
    margin: 0 0 8px 0;
    font-size: 1.1em;
}

.characteristic-card p {
    margin: 0;
    font-size: 0.85em;
}

/* Vector visualization */
.vector-visual {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin: 20px 0 10px 0;
}

.vector-element {
    background: #3498db;
    color: white;
    padding: 15px 20px;
    border-radius: 5px;
    font-weight: bold;
    font-size: 1.1em;
    min-width: 50px;
    text-align: center;
}

.vector-indices {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin-bottom: 20px;
}

.vector-indices span {
    padding: 5px 20px;
    font-weight: bold;
    color: #666;
    min-width: 50px;
    text-align: center;
}

/* Matrix visualization */
.matrix-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 20px 0;
    gap: 5px;
}

.matrix-row {
    display: flex;
    gap: 5px;
}

.matrix-element {
    background: #e74c3c;
    color: white;
    padding: 15px;
    border-radius: 5px;
    font-weight: bold;
    font-size: 1.2em;
    min-width: 50px;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Applications tags */
.applications {
    margin: 15px 0;
}

.app-tag {
    display: inline-block;
    background: #27ae60;
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    margin: 5px 5px 5px 0;
    font-size: 0.9em;
    font-weight: bold;
}

/* Challenges and limitations */
.challenges, .limitations {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 5px;
    padding: 15px;
    margin: 15px 0;
}

.challenges p, .limitations p {
    margin: 5px 0;
}

/* Practical example */
.practical-example {
    background: #d1ecf1;
    border: 1px solid #bee5eb;
    border-radius: 5px;
    padding: 15px;
    margin: 15px 0;
}

/* Simulator container styling */
.simulator-container {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
}

.simulator-container h3 {
    color: #495057;
    margin-top: 0;
}

.simulator-container input,
.simulator-container textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ced4da;
    border-radius: 5px;
    margin: 10px 0;
    font-size: 1em;
}

.simulator-container textarea {
    height: 80px;
    resize: vertical;
}

.simulator-container button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    font-weight: bold;
    transition: transform 0.2s ease;
}

.simulator-container button:hover {
    transform: translateY(-2px);
}

.simulator-container p {
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 5px;
    padding: 10px;
    margin-top: 15px;
    min-height: 40px;
    font-family: 'Courier New', monospace;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Navigation improvements */
nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    padding: 5px 10px;
    transition: all 0.3s ease;
}

/* Responsive design */
@media (max-width: 768px) {
    .operations-grid,
    .characteristics-grid {
        grid-template-columns: 1fr;
    }
    
    .vector-visual {
        flex-wrap: wrap;
    }
    
    .tab-buttons {
        flex-direction: column;
    }
    
    .tab-button {
        flex: none;
    }
    
    nav ul li {
        display: block;
        margin: 5px 0;
    }
}


/* Animations and transitions */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Apply animations to sections */
section {
    animation: fadeInUp 0.6s ease-out;
}

.operation-card,
.characteristic-card {
    animation: slideInLeft 0.5s ease-out;
}

.vector-element,
.matrix-element {
    animation: pulse 2s infinite;
}

/* Hover effects */
.tab-button {
    transition: all 0.3s ease;
}

.tab-button:hover {
    background-color: #ddd;
    transform: translateY(-2px);
}

.tab-button.active {
    background-color: #fff;
    border-bottom: 2px solid #333;
    transform: translateY(-1px);
}

/* Smooth transitions for all interactive elements */
* {
    transition: all 0.3s ease;
}

/* Loading animation for simulator outputs */
.simulator-container p:empty::before {
    content: "Aguardando entrada...";
    color: #6c757d;
    font-style: italic;
}

/* Enhanced button styles */
button {
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

button:hover::before {
    left: 100%;
}


/* Simulator buttons styling */
.simulator-buttons {
    display: flex;
    gap: 10px;
    margin: 10px 0;
    flex-wrap: wrap;
}

.example-btn {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%) !important;
}

.example-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* Active navigation link */
nav ul li a.active {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 5px;
    padding: 5px 10px;
}

/* Responsive simulator buttons */
@media (max-width: 768px) {
    .simulator-buttons {
        flex-direction: column;
    }
    
    .simulator-buttons button {
        width: 100%;
    }
}


/* Exercise cards styling */
.exercises-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.exercise-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
}

.exercise-card:hover {
    transform: translateY(-5px);
}

.exercise-card h4 {
    margin: 0 0 10px 0;
    font-size: 1.2em;
}

.exercise-card p {
    margin: 0 0 15px 0;
    font-size: 0.9em;
    line-height: 1.4;
}

.exercise-btn {
    background: rgba(255, 255, 255, 0.2) !important;
    border: 2px solid white !important;
    color: white !important;
    padding: 10px 20px !important;
    border-radius: 25px !important;
    font-weight: bold !important;
    transition: all 0.3s ease !important;
}

.exercise-btn:hover {
    background: white !important;
    color: #667eea !important;
    transform: translateY(-2px) !important;
}

/* Student system styling */
.practical-system {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
}

.student-system {
    margin-top: 15px;
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #495057;
}

.input-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ced4da;
    border-radius: 5px;
    font-size: 1em;
}

.system-buttons {
    display: flex;
    gap: 10px;
    margin: 15px 0;
    flex-wrap: wrap;
}

.system-buttons button {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: bold;
    transition: all 0.3s ease;
}

.system-buttons button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.clear-btn {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%) !important;
}

.system-output {
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 5px;
    padding: 15px;
    margin-top: 15px;
    min-height: 50px;
    font-family: 'Courier New', monospace;
    line-height: 1.5;
}

/* Responsive design for exercises and system */
@media (max-width: 768px) {
    .exercises-container {
        grid-template-columns: 1fr;
    }
    
    .system-buttons {
        flex-direction: column;
    }
    
    .system-buttons button {
        width: 100%;
    }
}


/* Interactive Playground Styles */
.interactive-playground {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    border-radius: 15px;
    margin: 30px 0;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.interactive-playground h3 {
    margin: 0 0 20px 0;
    text-align: center;
    font-size: 1.5em;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.playground-controls {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.playground-controls .input-group {
    margin-bottom: 15px;
}

.playground-controls .input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: white;
}

.playground-controls input {
    width: 100%;
    padding: 10px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    background: rgba(255, 255, 255, 0.9);
    color: #333;
}

.playground-buttons {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.playground-buttons button {
    background: rgba(255, 255, 255, 0.2) !important;
    border: 2px solid rgba(255, 255, 255, 0.5) !important;
    color: white !important;
    padding: 10px 15px !important;
    border-radius: 8px !important;
    font-weight: bold !important;
    cursor: pointer !important;
    transition: all 0.3s ease !important;
    font-size: 0.9em !important;
}

.playground-buttons button:hover {
    background: rgba(255, 255, 255, 0.3) !important;
    border-color: white !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2) !important;
}

.playground-result {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    padding: 15px;
    margin-top: 15px;
    min-height: 60px;
    font-family: 'Courier New', monospace;
    line-height: 1.6;
    white-space: pre-wrap;
    overflow-x: auto;
}

/* Vector Display */
.vector-display {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    padding: 15px;
    font-family: 'Courier New', monospace;
    font-size: 1.2em;
    text-align: center;
    color: #FFD700;
    font-weight: bold;
}

/* Matrix Display */
.matrix-display {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.matrix-row {
    display: flex;
    gap: 10px;
}

.matrix-row input {
    width: 60px;
    height: 60px;
    text-align: center;
    font-size: 1.2em;
    font-weight: bold;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    border-radius: 8px;
}

.matrix-row input:focus {
    outline: none;
    border-color: #FFD700;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

/* Responsive design for playgrounds */
@media (max-width: 768px) {
    .playground-buttons {
        flex-direction: column;
    }
    
    .playground-buttons button {
        width: 100%;
        margin-bottom: 5px;
    }
    
    .matrix-row input {
        width: 50px;
        height: 50px;
        font-size: 1em;
    }
    
    .matrix-row {
        gap: 5px;
    }
}

/* Animation for results */
.playground-result.updated {
    animation: resultUpdate 0.5s ease-in-out;
}

@keyframes resultUpdate {
    0% { transform: scale(0.95); opacity: 0.7; }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); opacity: 1; }
}