style.css

body {
    background: lightyellow;
    font-family: sans-serif;
    padding: 30px;
}

.main-header {
    text-align: center;
}

.main-header img {
    width: 100px;
}

pre {
    margin: 0;
    padding: 0;
}

p {
    margin: 0;
    margin-bottom: 1em;
}

label {
    font-size: 14px;
    display: inline-block;
    padding: 0 0.3em 0 1em;
}

input {
    border: none;
    padding: 5px 8px;
    border-radius: 5px;
}

button {
    -webkit-appearance: none;
    border: none;
    color: white;
    background-color: maroon;
    padding: 5px 13px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.35s;
}

button:hover {
    background-color: #b72020;
}

form {
    display: block;
    margin-bottom: 1em;
    padding: 1em;
    background: wheat;
    border-radius: 10px;
}

#garden-controls {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#garden {
    background: lightgreen;
    padding: 2em 1em;
    margin-bottom: 1em;
    border-radius: 10px;
    color: darkgreen;
    font-weight: bolder;
}

#result {
    text-align: center;
}

.alert {
    padding: 0.5em;
    border-radius: 3px;
    background: gold;
}

.hide {
    display: none;
}

.main-footer,
.main-footer ul {
    display: flex;
    align-items: center;
}

.main-footer ul {
    list-style: none;
    margin: 0;
    padding: 0;
    margin-inline-start: 1em;
}

.main-footer ul li {
    margin-inline-end: 1em;
}

.main-footer img {
    width: 20px;
}