:root {
    --bg-color: #f4f7fe;
    --card-bg-color: #ffffff;
    --text-color: #333333;
    --header-bg-color: #ffffff;
    --border-color: #e1e1e1;
    --shadow-color: rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
}

.header {
    background-color: var(--header-bg-color);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 4px var(--shadow-color);
}

.header h1 {
    margin: 0;
    font-size: 1.5rem;
    text-align: center;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    padding: 2rem;
    max-width: 1600px;
    margin: 0 auto;
}

.card {
    background-color: var(--card-bg-color);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.card h2 {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.kpi-container {
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 100%;
    padding-top: 1rem;
}

.kpi-item {
    text-align: center;
}

.kpi-item h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
    color: #666;
}

.kpi-item p {
    margin: 0;
    font-size: 2rem;
    font-weight: bold;
    color: #007bff;
}

.footer {
    text-align: center;
    padding: 1.5rem;
    margin-top: 2rem;
    font-size: 0.9rem;
    color: #777;
    border-top: 1px solid var(--border-color);
}