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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

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

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: 10px;
    margin-bottom: 2rem;
    text-align: center;
}

.section {
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.section h2 {
    color: #333;
    margin-bottom: 1rem;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 0.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #555;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn {
    background: #667eea;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.btn:hover {
    background: #5a6fd8;
}

.btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.checkbox-group {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.file-input {
    position: relative;
    display: inline-block;
    cursor: pointer;
    background: #f8f9fa;
    border: 2px dashed #dee2e6;
    border-radius: 5px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
}

.file-input:hover {
    border-color: #667eea;
    background: #f0f4ff;
}

.file-input input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
    margin: 1rem 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s;
}

.results {
    background: #f8f9fa;
    border-radius: 5px;
    padding: 1rem;
    max-height: 400px;
    overflow-y: auto;
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 0.9rem;
}

.graph-container {
    margin: 1rem 0;
    padding: 1rem;
    background: white;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.graph-container canvas {
    max-width: 100% !important;
    height: 400px !important;
    display: block;
}

.charts-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.chart-container {
    width: 100%;
    height: 400px;
    position: relative;
    overflow: hidden;
}

.chart-container.half-width {
    width: 48%;
    flex: 1;
}

@media (max-width: 1024px) {
    .charts-row {
        flex-direction: column;
    }
    
    .chart-container.half-width {
        width: 100%;
    }
}

.status {
    padding: 0.75rem;
    border-radius: 5px;
    margin: 1rem 0;
    text-align: center;
    font-weight: 600;
}

.status.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.status.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.download-section {
    display: none;
    margin-top: 2rem;
}

.download-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem;
    border-bottom: 1px solid #eee;
}

.download-item:last-child {
    border-bottom: none;
}

.tab-container {
    margin-top: 2rem;
}

.tab-buttons {
    display: flex;
    background: #f8f9fa;
    border-radius: 5px;
    padding: 0.25rem;
    margin-bottom: 1rem;
}

.tab-button {
    flex: 1;
    padding: 0.75rem;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.3s;
}

.tab-button.active {
    background: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.tab-content {
    display: none;
}

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

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
}