body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: rgb(149, 184, 140);
}

nav {
    background-color: rgb(51, 51, 51);
    padding: 10px;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 20px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 10px 15px;
    display: block;
    transition: background-color 0.3s ease;
}

nav ul li a:hover,
nav ul li a.active {
    background-color: rgb(85, 85, 85);
}

.container {
    display: flex;
    justify-content: space-around; 
    flex-wrap: wrap; 
    margin: 20px; 
}

.figura {
    flex: 1; 
    max-width: 300px; 
    margin: 10px; 
    text-align: center; 
}

.figura img {
    width: 100%; 
    height: auto; 
    border-radius: 8px; 
}

input[type="number"] {
    padding: 10px;
    margin: 10px;
    border: 1px solid rgb(204, 204, 204);
    border-radius: 5px;
    width: 200px;
}

button {
    padding: 10px 15px;
    background-color: rgb(73, 104, 137);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: rgb(0, 86, 179);
}


.alert {
    margin-top: 20px;
    padding: 10px;
    background-color: rgb(212, 237, 218);
    color: rgb(21, 87, 36);
    border: 1px solid rgb(195, 230, 203);
    border-radius: 5px;
    display: none; 
}

h3 {
    font-size: 18px;
    color: rgb(51, 51, 51);
}

.calculadora {
    width: 260px;
    margin: 50px auto;
    padding: 20px;
    background-color: rgb(200, 230, 201);
    border-radius: 10px;
    text-align: center;
}

.calculadora #display {
    width: 90%; 
    height: 50px;
    background-color: white;
    text-align: right;
    padding: 10px;
    margin: 0 auto 20px; 
    border-radius: 5px;
    display: block; 

.teclado button {
    width: 50px;
    height: 50px;
    margin: 5px;
    font-size: 18px;
    background-color: rgb(73, 104, 137);
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    cursor: pointer;
}

.teclado button:hover {
    background-color: rgb(0, 86, 179);
}

.teclado button:active {
    background-color: rgb(50, 50, 150);
}
}