:root {
    /* colors */
    --clr-cyan: hsl(180, 62%, 55%);
    --clr-red: hsl(0, 78%, 62%);
    --clr-yellow: hsl(34, 97%, 64%);
    --clr-blue: hsl(212, 86%, 64%);
    --clr-soft-blue: hsl(233, 100%, 98%);
    --clr-grayish: hsl(228, 12%, 44%);
    --clr-dark-blue: hsl(234, 12%, 34%);
    --clr-white: hsl(0, 0%, 100%);
    --ff-poppins: 'Poppins', sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--ff-poppins);
    background-color: var(--clr-soft-blue);
    color: var(--clr-grayish);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
}


/* Intro */
.intro {
    text-align: center;
    padding: 4rem 2rem 2rem;
}

.intro h1 {
    margin: 0;
    line-height: 1.2;
}

.intro h1 span {
    display: flex;
    justify-content: center;
}

.intro h1 span:first-child {
    font-weight: 200;
    font-size: 1.75rem;
    color: var(--clr-grayish);
}

.intro h1 span:last-child {
    font-weight: 600;
    font-size: 1.75rem;
    color: var(--clr-dark-blue);
    margin-top: 0.5rem;
}

.intro p {
    margin-top: 1rem;
    font-size: 0.9375rem;
    max-width: 327px;
    margin-left: auto;
    margin-right: auto;
}

/* Feature cards – mobile (one column) */
.features {
    max-width: 327px;
    margin: 0 auto;
    display: flex;
    justify-content: space-evenly;
    flex-wrap: wrap;
    align-items: center;
    align-content: center;

}

.card {
    height: 15rem;
    position: relative;
    background: var(--clr-white);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    margin: 0 0 1.5em 0;
}

/* colored top stripe */
.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    height: 6px;
    width: 100%;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}

.card-supervisor::before {
    background: var(--clr-cyan);
}

.card-team-builder::before {
    background: var(--clr-red);
}

.card-karma::before {
    background: var(--clr-yellow);
}

.card-calculator::before {
    background: var(--clr-blue);
}

.card h3 {
    margin: 0 0 1rem;
    font-size: 1.125rem;
    color: var(--clr-dark-blue);
}

.card p {
    margin: 0 0 2.5rem;
    font-size: 0.9375rem;
    line-height: 1.5;
}

/* icon at bottom right */
.icon {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    width: 40px;
    height: 40px;
}

.icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* attribution */
.attribution {
    text-align: center;
    font-size: 0.75rem;
    padding-bottom: 2rem;
    margin: 1rem 0;
}

.attribution a {
    color: inherit;

}


/* Desktop (diamond layout) */
@media (min-width: 768px) {
    .intro {
        padding-top: 4rem;
        justify-content: center;
        padding-bottom: 0;
    }

    .intro h1 span {
        font-size: 2.5rem;
        justify-content: center;
    }

    .intro p {
        max-width: 540px;
        /* margin: 1rem auto 2rem; */
        font-size: 1rem;
    }

    .features {
        max-width: 100%;
        margin: 0 5rem;
        display: flex;
        justify-content: space-evenly;
        align-items: center;
        align-content: center;
        flex-shrink: 0;
        flex-wrap: nowrap;
    }

    .innerCard {
        width: 375px;
    }

    .card-calculator {

        margin: 1.5em 1.5rem;
    }

    .card-supervisor {

        margin: 1.5em 1.5rem;
    }

    .card-karma {
        margin: 1.5rem 0;
    }

    .card-team-builder {
        margin: 1.5rem 0;
    }
}