body {
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        background: linear-gradient(135deg, #f9f9f9, #d3e0ea);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        min-height: 100vh;
        margin: 0;
        padding: 20px;
    }

    h2 {
        color: #333;
        margin-bottom: 20px;
        text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
    }

    /* Tabla */
    table {
        border-collapse: collapse;
        background-color: #fff;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        border-radius: 10px;
        overflow: hidden;
        margin-bottom: 30px;
        width: 250px;
    }

    table td {
        padding: 10px 15px;
        text-align: center;
        border-bottom: 1px solid #eee;
    }

    table tr:last-child td {
        border-bottom: none;
    }

    table tr:nth-child(even) {
        background-color: #f2f2f2;
    }

    /* Formulario */
    form {
        background-color: #fff;
        padding: 20px 30px;
        border-radius: 10px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        display: flex;
        gap: 10px;
        align-items: center;
    }

    input[type="number"] {
        padding: 8px 12px;
        border: 1px solid #ccc;
        border-radius: 6px;
        font-size: 16px;
        outline: none;
        transition: 0.3s;
    }

    input[type="number"]:focus {
        border-color: #4a90e2;
        box-shadow: 0 0 5px rgba(74, 144, 226, 0.5);
    }

    button {
        padding: 8px 16px;
        background-color: #4a90e2;
        color: #fff;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        font-size: 16px;
        transition: 0.3s;
    }

    button:hover {
        background-color: #357abd;
    }

    label {
        font-weight: bold;
        color: #333;
    }