styles.css

:root {
    --color1: rgb(21, 196, 94);
    --color2: #EEE;
}

* {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
}

*:focus {
    outline: none;
}

body {
    background-color: var(--color2);
    height: 100vh;
}

main {
    align-items: center;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

h1 {
    font-size: 6vw;
    margin: 20px 0;
}

.container1 {
    display: flex;
    margin-bottom: 35px;
    width:80vw;
}

.container1 input {
    border: 2px solid var(--color1);
    border-right: none;
    border-radius: 5px 0px 0px 5px;
    font-size: 2.5vw;
    padding: .5vw;
    width: 63vw;
}

.container1 button {
    background-color: var(--color1);
    border: 2px solid var(--color1);
    border-radius: 0px 5px 5px 0px;
    color: var(--color2);
    cursor: pointer;
    font-size: 2.5vw;
    padding: 1.5vw 2vw;
    transition: background-color 500ms, color 500ms;
}

.container1 button:hover {
    background-color: var(--color2);
    color: var(--color1);
}

.container2 {
    align-items: center;
    display: flex;
    flex-direction: column;
    margin-bottom: 40px;
}

table {
    font-size: 3vw;
    font-weight: bold;
    margin-bottom: 20px;
    width: 78vw;
}

td {
    width: 60vw;
}

.heart0 {
    filter: invert(24%) sepia(91%) saturate(3082%) hue-rotate(323deg) brightness(98%) contrast(91%);
}

.heart1 {
    filter: invert(17%) sepia(90%) saturate(7486%) hue-rotate(332deg) brightness(100%) contrast(104%);
}

.tableButtons {
    width: 4.5vw;
}

.buttons {
    cursor: pointer;
    width: 3vw;
    margin: .25vw;
    transition: filter 500ms, margin 500ms, width 500ms;
}

.buttons:hover {
    margin: 0;
    width: 3.5vw;
}

.update {
    display: none;
    filter: invert(75%) sepia(27%) saturate(7416%) hue-rotate(96deg) brightness(94%) contrast(83%);
}

.update:hover {
    filter: invert(18%) sepia(99%) saturate(4796%) hue-rotate(148deg) brightness(88%) contrast(86%);
}


.edit {
    filter: invert(36%) sepia(96%) saturate(414%) hue-rotate(142deg) brightness(94%) contrast(89%);
}

.edit:hover {
    filter: invert(16%) sepia(78%) saturate(766%) hue-rotate(169deg) brightness(91%) contrast(104%);
}

.delete {
    filter: invert(24%) sepia(100%) saturate(5360%) hue-rotate(354deg) brightness(109%) contrast(83%);
}

.delete:hover {
    filter: invert(13%) sepia(54%) saturate(3607%) hue-rotate(348deg) brightness(86%) contrast(122%);
}

.clear {
    background-color: var(--color2);
    border: 2px solid var(--color1);
    border-radius: 3px;
    color: var(--color1);
    cursor: pointer;
    font-size: 2.5vw;
    padding: 1.5vw 2vw;
    transition: background-color 500ms, color 500ms;
}

.clear:hover {
    background-color: var(--color1);
    color: var(--color2);
}

.editInput {
    font-size: 3vw;
    font-weight: bold;
    width: 55vw;
}

@media screen and (max-width:450px) {
    h1 {
        font-size: 10vw;
    }
    
    .container1 {
        width: 90vw;
    }
    
    .container1 input {
        font-size: 5vw;
        width: 65vw;
    }
    
    .container1 button {
        font-size: 4vw;
    }

    table {
        font-size: 4.5vw;
        width: 90vw;
    }

    .buttons {
        width: 5vw;
        margin: .5vw;
    }
    
    .buttons:hover {
        margin: 0;
        width: 6vw;
    }
    
    .clear {
        font-size: 4vw;
        position: fixed;
        top: 92vh;
    }
}