* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: white;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
}

.container {
    max-width: 100%;
    margin: 0;
    padding: 1rem;
    border: 3px solid black;
}

@media (min-width: 600px) {
    .container {
        max-width: 600px;
        margin: 2rem auto;
        padding: 2rem;
    }
}

.input-group {
    margin-bottom: 2rem;
    border: 2px solid black;
    padding: 1rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

.input-group input {
    width: 100%;
    padding: 0.75rem;
    font-size: 16px;
    border: 2px solid black;
    background: white;
    -webkit-appearance: none;
    -moz-appearance: textfield;
}

.input-group input:focus {
    outline: none;
    border-width: 3px;
}

.results {
    margin-top: 2rem;
    padding: 1.5rem;
    border: 2px solid black;
    background-color: white;
}

.errors {
    margin: 1rem 0;
    padding: 1rem;
    border: 2px solid black;
    background-color: white;
}

.errors p {
    color: black;
    font-size: 0.9rem;
    margin: 0.5rem 0;
    font-weight: normal;
}

h1 {
    color: black;
    margin-bottom: 2rem;
    font-size: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-bottom: 3px solid black;
    padding-bottom: 0.5rem;
}

h2 {
    color: black;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid black;
    padding-bottom: 0.5rem;
}

p {
    margin: 1rem 0;
    font-size: 1.1rem;
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

p span {
    font-weight: normal;
}

p strong {
    min-width: 120px;
    text-align: right;
}

input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
    -webkit-appearance: none;
    margin: 0;
}