body {
    font-family: 'Arial', sans-serif;
    background-color: #2C3E50;
    color: #0f1314;
    text-align: center;
    padding: 20px;
}

.contenedor {
    background: #adde92;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    display: inline-block;
    max-width: 500px;
    width: 100%;
}

h1 {
    color: #5c522b;
}

label {
    display: block;
    margin-top: 10px;
    font-weight: bold;
}

select {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    background: #787a7c;
    color: #121515;
    border: 1px solid #F1C40F;
    border-radius: 6px;
    cursor: pointer;
    outline: none;
    transition: all 0.3s ease;
}

select:hover {
    background: #293B4D;
}

button {
    background: #4efc6b;
    color: rgb(29, 34, 30);
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-size: 16px;
    margin-top: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background: #E67E22;
}

.resistencia {
    display: flex;
    justify-content: center;
    align-items: center;
    background: #BDC3C7;
    padding: 10px;
    margin-top: 20px;
    border-radius: 8px;
    position: relative;
}

.banda {
    width: 15px;
    height: 60px;
    margin: 0 5px;
    border-radius: 4px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

#resultado {
    font-size: 18px;
    margin-top: 15px;
    font-weight: bold;
    background: rgba(255, 255, 255, 0.1);
    padding: 10px;
    border-radius: 6px;
}