:root {
    --orange: hsl(25, 97%, 53%);
    --white: hsl(0, 0%, 100%);
    --light-grey: hsl(217, 12%, 63%);
    --medium-grey: hsl(216, 12%, 54%);
    --light-blue: hsl(213, 19%, 22%);
    --dark-blue: hsl(213, 19%, 18%);
    --very-dark-blue: hsl(216, 12%, 8%);
}

html {
    font: 15px 'Overpass', sans-serif;
}

body {
    background: var(--very-dark-blue);
    margin: 0;
    padding: 0;
}

main {
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.card {
    background: var(--dark-blue);
    color: var(--light-grey);
    padding: 2.5rem;
    margin: 0 1rem;
    border-radius: 28px;
    width: 28rem;
    line-height: 2rem;
    box-sizing: border-box;
    overflow: hidden;
}

.card__header {
    margin-bottom: 2rem;
}

.card__circle {
    border-radius: 50%;
    background: var(--light-blue);
    width: 3.5rem;
    height: 3.5rem;
    position: relative;
    transition: background 200ms linear;
}

.card__title {
    color: var(--white);
    margin: 1rem 0 1rem;
}

.card__button {
    background: var(--orange);
    color: var(--white);
    width: 100%;
    border-radius: 2rem;
    font-size: 1rem;
    border: 0px;
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: .8rem 0;
    margin-top: 1rem;
    margin: auto;
    font-weight: bold;
}

.card__button:hover {
    background: var(--white);
    color: var(--orange);
    cursor: pointer;
}

.card__rating .card__circle:hover {
    background: var(--medium-grey);
    color: white;
    cursor: pointer;
}

.card__circle.is-active {
    background: var(--orange) !important;
    color: var(--white);
}

.card__rating {
    display: flex;
    justify-content: space-between;
    padding: 0;
    margin: 0;
    margin-bottom: 2rem;
    list-style: none;
}

.card__image {
    position: absolute;
    left: calc(50% - 0.5rem);
    top: calc(50% - 0.5rem);
    width: 1rem;
    height: 1rem;
}

.card__subtitle {
    background: var(--light-blue);
    color: var(--orange);
    line-height: 2.2rem;
    border-radius: 1rem;
    padding: 0 1rem;
    margin: 2rem 0;
    display: inline-block;
}

.card__number {
    position: absolute;
    left: calc(50% - 0.25rem);
    top: calc(50% - 0.8rem);
    font-weight: bold;
    width: 1rem;
    height: 1rem;

}

.card__result {
    display: none;
    text-align: center;
    padding-top: 1rem;
}

.is-visible {
    opacity: 1;
    display: block;
}

.is-invisible {
    opacity: 0;
    display: none;
}

@media only screen and (max-width: 375px) {
    .card {
        min-width: 350px;
    }
}