body {
    margin: 0;
    padding: 0;
    background: #f3f6fa;
    font-family: "Segoe UI", Arial, sans-serif;
    text-align: center;
    color: #1e2a38;

    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Título estilo Blockly */
h2 {
    margin-top: 60px;
    font-size: 42px;
    color: #4a90e2;
    font-weight: 600;
}

/* Caja estilo panel Blockly */
.container {
    margin-top: 50px;
    padding: 40px 55px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
}

/* Botón estilo bloque */
button {
    margin-top: 20px;
    padding: 14px 28px;
    font-size: 16px;
    font-family: inherit;
    color: white;
    background: #4caf50;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: 0.2s ease;
}

button:hover {
    background: #43a047;
    transform: scale(1.05);
}

/* Botón secundario */
.back-btn {
    margin: 30px 0 60px 0;
    padding: 14px 30px;
    font-size: 16px;
    font-family: inherit;
    color: white;
    background: #ff9800;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: 0.2s ease;
}

.back-btn:hover {
    background: #fb8c00;
    transform: scale(1.05);
}