:root {
--Red: hsl(0, 78%, 62%);
--Cyan: hsl(180, 62%, 55%);
--Orange: hsl(34, 97%, 64%);
--Blue: hsl(212, 86%, 64%);
--Grey_500: hsl(234, 12%, 34%);
--Grey_400: hsl(212, 6%, 44%);
--White: hsl(0, 0%, 100%);
}

@font-face {
    font-family: 'Poppins';
    src: url('./fonts/Poppins-ExtraLight.ttf') format('truetype');
    font-weight: 200;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Poppins';
    src: url('./fonts/Poppins-Regular.ttf') format('truetype');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Poppins';
    src: url('./fonts/Poppins-SemiBold.ttf') format('truetype');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

body {
    display: grid;
    place-content: center; /* Safer than place-items for scrolling */
    min-height: 100vh;
    font-size: 15px;
    font-family: 'Poppins', sans-serif;
    padding: 4rem 1.5rem; /* Prevents cutoff on short screens and adds phone edges */
    background-color: #fafafa; /* Very light gray makes the white cards 'pop' */
    box-sizing: border-box;
}

header.intro-section {
    text-align: center;
    max-width: min(33em, 95vw);
    margin: 0 auto;
    margin-bottom: 4rem;
}

header.intro-section p {
    color: var(--Grey_400);
    line-height: 1.6;
    margin-top: 1.5rem;
}

h1 {
    font-size: clamp(1.5rem, 4vw, 2.3rem); /* Fluid scaling for the heading */
}

h2 {
    font-size: 1.3rem;
    margin: 0;
}

.font-light {
    display: block;
    font-weight: 200;
}

.font-bold {
    display: block;
    font-weight: 600;
}

.cards-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr; /* 1 column on mobile */
    max-width: 1110px;
    margin: 0 auto;
    padding: 2rem; /* Adds breathing room on mobile so cards don't touch screen edges */
}

/* Tablet / Desktop scaling */
@media (min-width: 768px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr); /* 2 columns on tablet */
    }
}

@media (min-width: 1024px) {
    .cards-grid {
        grid-template-columns: repeat(3, 1fr); /* 3 columns on desktop */
        align-items: center; /* This is the secret to the diamond shape! */
    }
    .supervisor-card {
        grid-column: 1;
        grid-row: 1 / 3; /* Spans 2 rows, centered by align-items */
    }
    .teambuilder-card {
        grid-column: 2;
        grid-row: 1;
    }
    .karma-card {
        grid-column: 2;
        grid-row: 2;
    }
    .calculator-card {
        grid-column: 3;
        grid-row: 1 / 3;
    }
}

.card {
    background-color: var(--White);
    border-top: 4px solid;
    border-radius: 5px;
    padding: clamp(1.5rem, 5vw, 2rem);
    box-shadow: 0 15px 30px -11px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
}

.card p {
    color: var(--Grey_400);
    font-size: .85rem;
    line-height: 1.6;
}

.card img {
    margin-top: auto;
    align-self: flex-end;
    width: clamp(48px, 10vw, 70px);
    height: clamp(48px, 10vw, 70px);
}

.supervisor-card {
    border-color: var(--Cyan);
}

.teambuilder-card {
    border-color: var(--Red);
}

.karma-card {
    border-color: var(--Orange);
}

.calculator-card {
    border-color: var(--Blue);
}