body {
    margin: 0;
    padding: 15px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f5f5f5;
}

#access-denied, #content {
    max-width: 100%;
    margin: 0 auto;
}

#content {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

.buttons {
    text-align: center;
    margin: 20px 0;
}

.buttons button {
    margin: 0 5px;
    padding: 10px 20px;
    border: 1px solid #007bff;
    background: white;
    color: #007bff;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.buttons button:hover {
    background: #007bff;
    color: white;
}

.buttons button:active {
    transform: scale(0.95);
}

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

#usageChart {
    width: 100% !important;
    height: 100% !important;
}