style.css

* {
    box-sizing: border-box;
    font-family: 'Space Mono';
}

:root {
    --strong-cyan: hsl(172, 67%, 45%);
    --very-dark-cyan: hsl(183, 100%, 15%);
    --dark-grayish-cyan: hsl(186, 14%, 43%);
    --grayish-cyan: hsl(184, 14%, 56%);
    --light-grayish-cyan: hsl(185, 41%, 84%);
    --very-light-grayish-cyan: hsl(189, 41%, 97%);
    --white: hsl(0, 0%, 100%);
}

body {
    margin: 0;
    background-color: var(--light-grayish-cyan);
    display: flex;
    flex-direction: column;
    align-items: center;
    font-weight: 700;
}

.logo {
    padding: 3rem;
}

.content {
    background-color: var(--white);
    border-radius: 18px 18px 0 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    padding: 1.75rem;
    justify-content: space-between;
}

.light-section {
    flex: 6 1px;
    margin-bottom: 1rem;
}

label {
    display: block;
    color: var(--dark-grayish-cyan);
    margin-bottom: 0.5rem;
}

input {
    display: block;
    text-align: right;
    border: none;
    outline: none;
    background-color: var(--very-light-grayish-cyan);
    color: var(--very-dark-cyan);
    width: 100%;
    padding: 0.5rem 1rem 0.5rem 3rem;
    font-size: 24px;
    border-radius: 7px;
    background-repeat: no-repeat;
    background-size: 20px;
    background-position: 1rem center;
    margin-bottom: 2rem;
    caret-color: var(--strong-cyan);
    cursor: pointer;
}

input:hover,
input:focus {
    outline: 3px solid var(--strong-cyan);
}

input::placeholder {
    color: var(--grayish-cyan);
}

.button-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: stretch;
}

.button-container button,
.button-container input {
    background-color: var(--very-dark-cyan);
    border: none;
    flex: 1 1 7rem;
    height: 3rem;
    font-size: 24px;
    border-radius: 10px;
    color: var(--white);
}

.button-container button[selected] {
    background-color: var(--strong-cyan);
}

.button-container input {
    background-color: var(--very-light-grayish-cyan);
    padding: 0.5rem;
    text-align: center;
    color: var(--very-dark-cyan);
}

.button-container input:focus {
    text-align: right;
}

.button-container button:hover,
.button-container button:active {
    color: var(--very-dark-cyan);
    background-color: var(--light-grayish-cyan);
}

.dark-section {
    background-color: var(--very-dark-cyan);
    padding: 1.75rem;
    border-radius: 18px;
    flex: 3 1px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.total-category{
    display: flex;
    justify-content: space-between;
}

.total-category h2 {
    font-size: 36px;
    color: var(--strong-cyan);
}

.total-category h2,
.total-category h3,
.total-category h4 {
    margin: 0;
}

.total-category {
    margin-bottom: 2rem;
}

.total-category h3 {
    color: var(--white);
}

.total-category h4 {
    color: var(--dark-grayish-cyan);
}

#resetButton {
    background-color: var(--strong-cyan);
    color: var(--very-dark-cyan);
    border: none;
    outline: none;
    border-radius: 5px;
    padding: 0.5rem;
}

#resetButton:hover,
#resetButton:active {
    background-color: var(--light-grayish-cyan);
}

#resetButton[emptyState] {
    background-color: var(--dark-grayish-cyan);
    cursor: not-allowed;
}

@media only screen and (min-width: 768px) {
    body {
        padding-top: 3rem;
    }

    .content {
        width: 65vw;
        height: 60vh;
        border-radius: 18px;
        flex-direction: row;
    }

    .light-section {
        flex: 4 1px;
        padding: 0.5rem;
        margin-bottom: 0;
        padding-right: 3rem;
    }

    .total-category:nth-child(1) {
        margin-bottom: 3rem;
    }
    
    .total-category:nth-child(2) {
        margin-bottom: 0;
    }
}