@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@200;400;600&display=swap');

:root {
    --color-grey-500: hsl(234, 12%, 34%);
    --color-grey-400: hsl(212, 6%, 44%);
    --color-white: hsl(0, 0%, 100%);
    --color-red: hsl(0, 78%, 62%);
    --color-cyan: hsl(180, 62%, 55%);
    --color-blue: hsl(212, 86%, 64%);
    --color-orange: hsl(34, 97%, 64%);

    --color-background: #FAFAFA;

    --spacing-xs: 0.5rem; /* 8px */
    --spacing-sm: 1rem; /* 16px */
    --spacing-md: 1.5rem; /* 24px */
    --spacing-lg: 2rem; /* 32px */
    --spacing-xl: 2.5rem; /* 40px */
}

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

main {
    font-family: 'Poppins', sans-serif;
    background-color: var(--color-background);
    display: flex;
    flex-direction: column;
    gap: 3.75rem;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding-top: 3.75rem;
    padding-bottom: 3.75rem;
}

header {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 19.75rem; /* 316px */
}

header h1 {
    color: var(--color-grey-500);
    font-weight: 200;
    font-size: 1.5rem; /* 24px */
    line-height: 1.4; /* 140% */
    letter-spacing: 0.015625rem; /* 0.25px */
}

header h2 {
    color: var(--color-grey-500);
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem; /* 24px */
    font-weight: 600;
    line-height: 1.4; /* 140% */
    letter-spacing: 0.015625rem; /* 0.25px */
}

header p {
    color: var(--color-grey-500);
    font-size: 0.9375rem; /* 15px */
    font-weight: 400;
    line-height: 1.4; /* 140% */
    letter-spacing: 0.00625rem; /* 0.25px */
    text-align: center;
}

section {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-areas:
          "team-builder"
          "supervisor"
          "karma"
          "calculator";
    column-gap: var(--spacing-lg);
}

article {
    box-shadow: 0 0.75rem 1.25rem 0 rgba(0, 0, 0, 0.1); /* 0 12px 20px 0 */
    padding: var(--spacing-lg);
    border-radius: 0.5rem;
    background-color: var(--color-white);
    border-top-style: solid;
    border-top-width: 0.25rem;
    height: 15.625rem; /* 250px */
    width: 19.625rem; /* 314px */
    display: flex;
    flex-direction: column;
}

article h3 {
    font-weight: 600;
    font-size: 1.25rem; /* 20px */
    line-height: 1.35; /* 135% */
    letter-spacing: 0;
}

article p {
    font-weight: 400;
    font-size: 0.8125rem; /* 13px */
    line-height: 1.6; /* 160% */
    letter-spacing: 0;
    margin-bottom: var(--spacing-lg);
}

article img {
    width: 4rem;
    height: 4rem;
    align-self: end;
}

.supervisor {
    border-top-color: var(--color-cyan);
    grid-area: supervisor;
}

.team-builder {
    border-top-color: var(--color-red);
    grid-area: team-builder;
}

.karma {
    border-top-color: var(--color-orange);
    grid-area: karma;
}

.calculator {
    border-top-color: var(--color-blue);
    grid-area: calculator;
}

@media (min-width: 768px) {
    main {
        padding-top: 4.625rem;
        padding-bottom: 4.625rem;
    }

    header {
        width: 33.75rem; /* 540px */
        font-size: 2.25rem; /* 36px */
    }

    section {
        grid-template-areas:
          ". team-builder team-builder ."
          "supervisor supervisor karma karma"
          ". calculator calculator .";
    }
}

@media (min-width: 1440px) {
    section {
        grid-template-areas:
          ". team-builder ."
            "supervisor team-builder calculator"
            "supervisor karma calculator"
            ". karma .";
    }
}