styles.css

:root{
    --body-light-background: #e8ecf1;
    --body-dark-background: #4d4e65;
    --container-light-background: #ffffff;
    --container-dark-background: #1c1c1c;
    --container-light-text-color: #000000;
    --container-dark-text-color: #ffffff;
    --day-date-container-light-text-color: #79858f;
    --day-date-container-dark-text-color: #b5b5b5;
    --button-light-text-color: #000000;
    --button-dark-text-color: #ffffff;
    --button-light-border-color: #e5e4e8;
    --button-dark-border-color: #f7f6fa66;
}

body{
    transition: all 250ms ease;
    padding: 0;
    margin: 0;
    font-family: 'Jost', sans-serif;
    max-height: 100vh;
    max-width: 100vw;
    height: 100%;
    width: 100%;
    background: var(--body-light-background);
}

.container{
    transition: all 250ms ease;
    color: var(--container-light-text-color);
    height: 330px;
    width: 280px;
    box-sizing: border-box;
    padding: 40px 30px;
    background-color: var(--container-light-background);
    border-radius: 35px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.1);
}

.container .time-date-day-container{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.container .time-date-day-container .time-container{
    font-weight: 500;
    font-size: 40px;
}

.container .time-date-day-container .day-date-container{
    transition: all 250ms ease;
    color: var(--day-date-container-light-text-color);
    display: flex;
    gap: 4px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.container .time-date-day-container .day-date-container .day-name-container{
    font-weight: 500;
    font-size: 18px;
}

.container .mode-select-button{
    transition: all 250ms ease;
    color: var(--button-light-text-color);
    position: static;
    font-family: 'Jost', sans-serif;
    font-size: 18px;
    width: 160px;
    padding: 20px;
    border: 3px solid var(--button-light-border-color);
    border-radius: 100vw;
    outline: none;
    background-color: transparent;
    cursor: pointer;
}