/* BFS Visualization - Estilos CSS */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    text-align: center;
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.header h1 {
    font-size: 2.5em;
    color: #2c3e50;
    margin-bottom: 10px;
}

.header p {
    font-size: 1.2em;
    color: #7f8c8d;
}

/* Control Panel */
.control-panel {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.controls-row {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-weight: 600;
    color: #2c3e50;
    font-size: 0.9em;
}

/* Github */
.github-icon {
    width: 20px;
    height: 20px;
    vertical-align: middle;
    margin-left: 8px;
    transition: transform 0.2s ease;
}

.github-link {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.github-link:hover .github-icon {
    transform: scale(1.1);
}

.control-group select {
    padding: 10px 15px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 1em;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s ease;
}

.control-group select:focus {
    outline: none;
    border-color: #3498db;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 5px;
}

.btn-primary {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #95a5a6, #7f8c8d);
    color: white;
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(149, 165, 166, 0.4);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9em;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

/* Graph Container */
.graph-container {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.graph-container h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.5em;
}

#graph-svg {
    width: 100%;
    height: 500px;
    border: 2px solid #e1e8ed;
    border-radius: 10px;
    background: #fafbfc;
}

/* Legend */
.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9em;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid #333;
}

.legend-color.initial { background: #e74c3c; }
.legend-color.goal { background: #27ae60; }
.legend-color.current { background: #f39c12; }
.legend-color.visited { background: #9b59b6; }
.legend-color.frontier { background: #3498db; }
.legend-color.solution { background: #e67e22; }

/* Step Container */
.step-container {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.step-container h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.5em;
}

#step-info {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    min-height: 150px;
    line-height: 1.6;
}

#step-info h3 {
    color: #2c3e50;
    margin-bottom: 10px;
}

#step-info p {
    margin-bottom: 10px;
}

#step-info ul {
    margin-left: 20px;
}

#step-info .highlight {
    background: #fff3cd;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
}

/* Step Controls */
.step-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    justify-content: center;
}

/* Progress */
.progress-container {
    margin-top: 20px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-weight: 600;
    color: #2c3e50;
}

.progress-bar {
    height: 8px;
    background: #e1e8ed;
    border-radius: 4px;
    overflow: hidden;
}

#progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2980b9);
    width: 0%;
    transition: width 0.3s ease;
}

/* Algorithm Info */
.algorithm-info {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.algorithm-info h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.5em;
}

/* Tabs */
.info-tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
    border-bottom: 2px solid #e1e8ed;
}

.tab-btn {
    padding: 12px 20px;
    border: none;
    background: transparent;
    color: #7f8c8d;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
    font-weight: 600;
}

.tab-btn.active {
    color: #3498db;
    border-bottom-color: #3498db;
}

.tab-btn:hover {
    color: #2980b9;
}

.tab-content {
    display: none;
    line-height: 1.6;
}

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

.tab-content h3 {
    color: #2c3e50;
    margin: 20px 0 10px 0;
}

.tab-content ul {
    margin-left: 20px;
}

.tab-content li {
    margin-bottom: 8px;
}

/* Queue Visualization */
#queue-visualization {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
}

.queue-item {
    display: inline-block;
    background: #3498db;
    color: white;
    padding: 8px 12px;
    margin: 5px;
    border-radius: 6px;
    font-weight: 600;
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    color: white;
}

/* SVG Styles for Graph */
.node {
    cursor: pointer;
    transition: all 0.3s ease;
}

.node.initial {
    fill: #e74c3c;
}

.node.goal {
    fill: #27ae60;
}

.node.current {
    fill: #f39c12;
    stroke: #d68910;
    stroke-width: 3px;
}

.node.visited {
    fill: #9b59b6;
}

.node.frontier {
    fill: #3498db;
}

.node.solution {
    fill: #e67e22;
}

.node.default {
    fill: #ecf0f1;
    stroke: #bdc3c7;
    stroke-width: 2px;
}

.node:hover {
    stroke: #2c3e50;
    stroke-width: 3px;
}

.link {
    stroke: #95a5a6;
    stroke-width: 2px;
    fill: none;
}

.link.solution {
    stroke: #e67e22;
    stroke-width: 4px;
}

.node-label {
    font-family: 'Segoe UI', sans-serif;
    font-size: 16px;
    font-weight: bold;
    text-anchor: middle;
    dominant-baseline: central;
    fill: #2c3e50;
    pointer-events: none;
}

.edge-label {
    font-family: 'Segoe UI', sans-serif;
    font-size: 12px;
    text-anchor: middle;
    fill: #7f8c8d;
    background: white;
    pointer-events: none;
}

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

.node.current {
    animation: pulse 1s infinite;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .controls-row {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-group {
        width: 100%;
    }
    
    .header h1 {
        font-size: 2em;
    }
    
    #graph-svg {
        height: 400px;
    }
    
    .legend {
        justify-content: center;
    }
}