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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: white;
    min-height: 100vh;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.tab-container {
    border-bottom: 1px solid #e0e0e0;
    background-color: #fafafa;
}

.tab-list {
    display: flex;
    list-style: none;
}

.tab-button {
    background: none;
    border: none;
    padding: 12px 24px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: #666;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.tab-button:hover {
    background-color: #f0f0f0;
    color: #333;
}

.tab-button.active {
    color: #2563eb;
    border-bottom-color: #2563eb;
    background-color: white;
}

.tab-content {
    display: none;
    padding: 24px;
}

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

.chart-container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}