body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

nav {
    background-color: #333;
    padding: 10px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 8px 12px;
    background-color: #444;
}

nav a:hover {
    color: yellow;
}

nav button {
    padding: 8px 12px;
    border: 1px solid black;
    cursor: pointer;
}

h1 {
    text-align: center;
    color: #333;
}

h2 {
    color: #444;
    margin-left: 10px;
}

h3 {
    margin-left: 10px;
}

p {
    margin: 10px;
    line-height: 1.5;
}

ul {
    margin-left: 20px;
}

table {
    width: 80%;
    margin: 10px auto;
    border-collapse: collapse;
    background-color: white;
}

th {
    background-color: #555;
    color: white;
    padding: 8px;
}

td {
    padding: 8px;
    text-align: center;
}

table, th, td {
    border: 1px solid black;
}

img {
    display: block;
    margin: 10px auto;
}

.formBox {
    width: 80%;
    margin: 20px auto;
    background-color: white;
    border: 1px solid black;
    padding: 15px;
}

label {
    display: block;
    margin-top: 10px;
    margin-bottom: 5px;
}

input, select {
    width: 100%;
    padding: 8px;
    box-sizing: border-box;
}

form button,
.formBox button {
    margin-top: 15px;
    margin-right: 10px;
    padding: 8px 12px;
    cursor: pointer;
}

#logMessage,
#welcomeMessage,
#emptyMessage,
#historyTitle {
    text-align: center;
}

.darkMode {
    background-color: #1f1f1f;
    color: white;
}

.darkMode h1,
.darkMode h2,
.darkMode h3,
.darkMode p,
.darkMode label,
.darkMode li {
    color: white;
}

.darkMode .formBox {
    background-color: #2b2b2b;
    color: white;
}

.darkMode table {
    background-color: #2b2b2b;
    color: white;
}

.darkMode th {
    background-color: #111;
}

.darkMode td,
.darkMode th,
.darkMode table {
    border: 1px solid white;
}

.darkMode input,
.darkMode select {
    background-color: #444;
    color: white;
    border: 1px solid white;
}

@media (max-width: 600px) {
    nav {
        flex-direction: column;
    }

    table {
        width: 95%;
        font-size: 12px;
    }

    .formBox {
        width: 95%;
    }
}

.setBox {
    margin-top: 15px;
    padding: 10px;
    border: 1px solid black;
    background-color: #f9f9f9;
}

.darkMode .setBox {
    background-color: #3a3a3a;
    border: 1px solid white;
}