body {
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
    color: #333;
}
.container {
    max-width: 960px;
    margin: auto;
    padding: 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 0 12px rgba(0,0,0,0.1);
}
h2 {
    color: #388e3c; /* Un tono más oscuro de #4caf50 para el encabezado */
    text-align: center;
}
form {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 2rem;
}
form input, form button {
    padding: 0.5rem;
    font-size: 1rem;
}
button {
    background-color: #4caf50; /* El nuevo color principal */
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}
.chart-block {
    margin-bottom: 3rem;
}
canvas {
    width: 100% !important;
    height: 300px !important;
}
#error {
    color: red;
    text-align: center;
}