:root{
    --body-backG-color: #3494e4;
    --body-font-color: #fdfdfd;
    --cup-border-color: #144fc6;
    --cup-backG-color: #fff;
    --small-cup-backG-color: rgba(255, 255, 255, 0.8);
    --fill-cup-color: #6ab3f8;
}

@import url('https://fonts.googleapis.com/css?family=Montserrat:wght@400;600&display=swap');

* {
    box-sizing: border-box; /*if we add border or padding, it doesn't affect the width of it. */
}

body {
    background-color: var(--body-backG-color);
    color: var(--body-font-color);
    font-family: 'Montserrat', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 40px;
}

h1 {
    margin: 10px 0px 0px;
    /* top rightANDleft bottom */
}

h3 {
    font-weight: 400;
    margin: 10px 0px;
    /* topANDbottom rightANDleft */
}

/* all cups */
.cup {
    background-color: var(--cup-backG-color);
    border: 4px solid var(--cup-border-color);
    color: var(--cup-border-color);
    border-radius: 0px 0px 40px 40px;
    height: 330px;
    width: 150px;
    margin: 30px 0px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* small cups */
.cups {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    width: 240px;
}
.cup.cup-small {
    height: 95px;
    width: 50px;
    border-radius: 0px 0px 15px 15px;
    background-color: var(--small-cup-backG-color);
    cursor: pointer;
    font-size: 14px;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin: 5px;
    transition: 0.3s ease;
}

.cup.cup-small.full {
    background-color: var(--fill-cup-color);
    color: #fff;
}

/* text inside big cup */
.remained {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    flex: 1;
    transition: 0.3s;
}

.remained span {
    font-size: 20px;
    font-weight: bold;
}

.remained small {
    font-size: 12px;
}

.percentage {
    background-color: var(--fill-cup-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 30px;
    height: 0px;
    transition: 0.3s ease;
}

.text {
    text-align: center;
    margin: 0px 0px 5px;
}