body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #000000;
    color: white;
    padding: 5px;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0px;
}

nav li {
    display: inline;
}
nav li a {
    color: white;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
}

main h2{
    padding: 0px 25px;
}

main h3 {
    padding: 0px 50px;
}

section {
    margin-bottom: 10px;
}

button {
    width: 100px;
    height: 30px;
    border-radius: 5px;
    border: none;
    background: #000000;
    color: #ffffff;
    font-size: 15px;
    font-weight: 700;
    line-height: normal;
    margin-left: 40px;
}

.category {
    display: flex;
    flex-wrap: wrap;
    padding: 0px 40px;
}

.category label {
    flex-basis: 25%;
    box-sizing: border-box;
}

.quantidade{
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 0px 40px;
}
.quantidade label {
    font-size: 18px;
    font-weight: 500;
}
.quantidade input {
    width: 80px;
    font-size: 14px;
    font-weight: 600;
    color: #414141;
}

.input-group {
    margin-bottom: 5px;
}

footer {
    background-color: #000000;
    color: white;
    padding: 1px;
    text-align: center;
}

#calculator {
    background-color: #f0f0f0;
    padding: 0px 10px 10px 10px;
    border: 1px solid #ccc;
    border-radius: 0px 0px 15px 15px;
}