body {
    background: #011c28;
    text-align: center;
    height: 100%;
    width: 100%;
    margin: 0 auto;
    font-family: 'Raleway', sans-serif;
}

button {
    background: #cde7f3;
    border: 0;
    color: #638998;
    font-size: 18px;
    font-weight: bold;
    padding: 10px;
    width: 120px;
    border-radius: 5px;
    margin-top: 20px;
}

button:active {
    background: #2C3E50;
}

h1 {
    font-size: 60px;
    color: beige;
    margin-top: 20px;
}

input {
    border: 0;
    border-radius: 5px;
    font-size: 16px;
    margin: 10px;
    padding: 10px;
}

#results {
    color: #C5EBFE;
    font-size: 24px;
    margin: 10px;
    line-height: 25px;
}

.vect {
    display: block;
    font-size: 24px;
    color: #C5EBFE;
    margin: 15px;
}

.vect>p {
    font-weight: bold;
}

.operation {
    margin: 35px 0;
}

.operation label {
    color: #C5EBFE;
    font-size: 24px;
}

.operation select {
    border: 0;
    border-radius: 5px;
    font-size: 16px;
    padding: 10px;
    margin: 10px;
}

.vector-group {
    display: flex;
    justify-content: center;
    margin: 15px 0;
}

.input-group {
    display: flex;
    align-items: center;
    margin: 0 10px;
}

.input-group label {
    margin-right: 5px;
}

/* Responsive Design */
@media (max-width: 600px) {
    h1 {
        font-size: 40px;
    }

    .vect {
        font-size: 18px;
    }

    .operation label {
        font-size: 18px;
    }

    .operation select {
        font-size: 14px;
        padding: 8px;
        margin: 8px;
    }

    button {
        font-size: 16px;
        padding: 8px;
        width: 100px;
    }

    input {
        font-size: 14px;
        padding: 8px;
        margin: 8px;
    }

    #results {
        font-size: 20px;
    }

    .vector-group {
        flex-direction: column;
        align-items: center;
    }

    .input-group {
        margin: 10px 0;
    }
}