:root {
    --primary-yellow: #FFC107;
    --primary-black: #212529;
    --text-color: #212529;
    --background-color: #FFFFFF;
    --border-color: #212529;
    --error-color: #DC3545;
    --success-color: #28A745;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    margin-bottom: 2rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-black);
    margin-bottom: 1rem;
}

.card {
    background: white;
    border: 2px solid var(--primary-black);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.card h2 {
    color: var(--primary-black);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

.controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

button {
    background: var(--primary-yellow);
    color: var(--primary-black);
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--primary-black);
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background: var(--primary-black);
    color: var(--primary-yellow);
    transform: translateY(-1px);
}

.status-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-black);
}

.api-status {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-weight: 500;
    margin-top: 1rem;
}

.api-status.pending {
    background: #FFF3CD;
    color: #856404;
    border: 1px solid #FFEEBA;
}

.api-status.success {
    background: #D4EDDA;
    color: #155724;
    border: 1px solid #C3E6CB;
}

.api-status.error {
    background: #F8D7DA;
    color: #721C24;
    border: 1px solid #F5C6CB;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    .controls {
        flex-direction: column;
    }

    button {
        width: 100%;
    }
}