body {
    background-color: #2C2F33;
    color: #B9BBBE;
    font-family: "Whitney", "Helvetica Neue", Helvetica, Arial, sans-serif;
    text-align: center;
    padding: 20px;
}

h2, h3 {
    color: #FFFFFF;
}

.grid {
    display: grid;
    grid-template-columns: repeat(4, 50px);
    gap: 4px;
    margin: 20px auto;
    width: fit-content;
}

.cell {
    width: 50px;
    height: 50px;
    background-color: #40444B;
    border: 1px solid #72767D;
    text-align: center;
    line-height: 50px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
}

.cell:hover {
    background-color: #5865F2;
}

.selected {
    background-color: #7289DA;
    box-shadow: 0 0 5px #7289DA;
}

button {
    background-color: #5865F2;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.2s ease-in-out;
    margin: 10px;
}

button:hover {
    background-color: #4752C4;
}

p {
    font-size: 18px;
    margin-top: 10px;
}

#output {
    font-weight: bold;
    color: #FFFFFF;
}

#linear-array {
    font-size: 14px;
    color: #B9BBBE;
}

#array-container {
    display: none;
    border: 2px solid #5865F2;
    padding: 10px;
    margin: 20px auto;
    width: fit-content;
    background-color: #40444B;
    border-radius: 8px; 
}

#array-container h3 {
    color: #FFFFFF;
    margin: 0;
    text-align: center;
}

#linear-array {
    font-size: 14px;
    color: #B9BBBE;
    text-align: center;
    padding-top: 5px;
}