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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --background-color: #f5f5f5;
    --card-background: #ffffff;
    --animation-duration: 0.5s;
}

body {
    background-color: var(--background-color);
    color: var(--dark-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header styles */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    text-align: center;
    margin-bottom: 15px;
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 20px;
}

nav ul li {
    padding: 10px 20px;
    border-radius: 5px;
}

nav ul li.active {
    background-color: var(--secondary-color);
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

/* Controls section */
.controls-section {
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 20px;
    border: none;
    border-radius: 5px;
    background-color: var(--secondary-color);
    color: white;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s, transform 0.2s;
}

.btn:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.btn.primary {
    background-color: var(--primary-color);
}

.btn.primary:hover {
    background-color: #1a252f;
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

select {
    padding: 10px;
    border-radius: 5px;
    border: 1px solid var(--light-color);
    background-color: white;
    font-size: 16px;
}

/* Visualization container */
.visualization-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.resources-section, .execution-section, .processes-section, .current-step-section {
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--light-color);
}

/* Resources display */
.resources-display {
    margin-bottom: 20px;
}

.resource-display {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}

.resource {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 18px;
    color: white;
    position: relative;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform var(--animation-duration);
}

.resource.updated {
    animation: pulse 1s ease-in-out;
}

.resource::after {
    content: attr(data-type);
    position: absolute;
    bottom: -25px;
    font-size: 14px;
    color: var(--dark-color);
    font-weight: bold;
}

/* Execution sequence */
.sequence-track {
    height: 60px;
    background-color: var(--light-color);
    border-radius: 30px;
    position: relative;
    margin: 30px 0;
}

.sequence-node {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--secondary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    position: absolute;
    top: 5px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: left var(--animation-duration) ease-in-out, transform var(--animation-duration);
    z-index: 2;
}

.sequence-node.active {
    transform: scale(1.2);
    background-color: var(--success-color);
}

.sequence-path {
    position: absolute;
    height: 4px;
    background-color: var(--secondary-color);
    top: 30px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--animation-duration) ease-in-out;
    z-index: 1;
}

.sequence-path.active {
    transform: scaleX(1);
}

/* Process display */
.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.process-card {
    background-color: var(--light-color);
    border-radius: 8px;
    padding: 15px;
    position: relative;
    overflow: hidden;
    transition: all var(--animation-duration);
}

.process-card.waiting {
    border-left: 5px solid var(--dark-color);
}

.process-card.active {
    border-left: 5px solid var(--warning-color);
    background-color: rgba(243, 156, 18, 0.1);
}

.process-card.completed {
    border-left: 5px solid var(--success-color);
    background-color: rgba(46, 204, 113, 0.1);
}

.process-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.process-id {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.process-status {
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 12px;
}

.process-status.waiting {
    background-color: var(--dark-color);
    color: white;
}

.process-status.active {
    background-color: var(--warning-color);
    color: white;
}

.process-status.completed {
    background-color: var(--success-color);
    color: white;
}

.process-matrices {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

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

.matrix-label {
    font-weight: bold;
    width: 80px;
    font-size: 14px;
}

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

.matrix-cell {
    width: 30px;
    height: 30px;
    border-radius: 4px;
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    border: 1px solid var(--light-color);
}

.matrix-cell.highlight {
    background-color: var(--secondary-color);
    color: white;
    animation: pulse 1s ease-in-out;
}

/* Current step display */
.step-info {
    background-color: var(--light-color);
    border-radius: 8px;
    padding: 20px;
    font-size: 16px;
    line-height: 1.6;
}

.step-info h3 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.step-info p {
    margin-bottom: 15px;
}

.step-info ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.step-info code {
    background-color: rgba(0, 0, 0, 0.05);
    padding: 2px 5px;
    border-radius: 3px;
    font-family: monospace;
}

/* Explanation page styles */
.explanation-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.explanation-section {
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.concept-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.concept-card {
    background-color: var(--light-color);
    border-radius: 8px;
    padding: 15px;
    height: 100%;
}

.concept-card h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.data-table {
    overflow-x: auto;
    margin-top: 20px;
}

.data-table table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--light-color);
}

.data-table th {
    background-color: var(--primary-color);
    color: white;
}

.algorithm-steps {
    margin-top: 20px;
}

.algorithm-steps ol {
    list-style-position: inside;
}

.algorithm-steps li {
    margin-bottom: 20px;
    padding-left: 20px;
}

.algorithm-steps h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.algorithm-steps ul {
    margin-left: 20px;
    margin-bottom: 10px;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: var(--dark-color);
    font-size: 14px;
}

/* Animations */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* Resource colors */
.resource-A { background-color: var(--accent-color); }
.resource-B { background-color: var(--success-color); }
.resource-C { background-color: var(--secondary-color); }

/* Responsive styles */
@media (max-width: 768px) {
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .visualization-container {
        grid-template-columns: 1fr;
    }
    
    .resource-display {
        flex-wrap: wrap;
    }
}

:root {
    --primary-color: #2CA6A4;
    --secondary-color: #208F8C;
    --accent-color: #4CB8B5;
    --background-color: #F8F7F5;
    --card-bg-color: #FFFFFF;
    --text-color: #2D2D2D;
    --border-radius: 10px;
    --process-color: #FFA726;
    --resource-color: #66BB6A;
    --error-color: #E53935;
    --warning-color: #FB8C00;
    --success-color: #43A047;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
}

.app-header {
    background-color: var(--primary-color);
    color: white;
}

.card {
    background-color: var(--card-bg-color);
    color: var(--text-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
}

.visualization-area {
    background-color: var(--card-bg-color);
}