body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #c1f0f6;
    margin: 0;
    padding: 20px;
}

h1 {
    color: #05445E;
}

h2 {
    color: #189AB4;
}

.botones button {
    margin: 5px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: #05445E;
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.botones button:hover {
    background-color: #189AB4;
}

.botones button.activo {
    background-color: #75d8e3;
    color: black;
    border: 2px solid #000;
}

.entradas {
    margin: 20px 0;
}

.entradas label {
    margin: 0 10px;
    font-size: 18px;
    color: #05445E;
}

.entradas select {
    padding: 5px;
    font-size: 16px;
}

button#comprobar {
    display: block;
    margin: 20px auto;
    background-color: #F4A261;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button#comprobar:hover {
    background-color: #E76F51;
}

.led {
    width: 50px;
    height: 50px;
    margin: 20px auto;
    border-radius: 50%;
    background-color: grey;
    border: 2px solid #000;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
}

.imagen img {
    width: 200px;
    height: auto;
    margin-top: 20px;
}