/* Mobile first */

:root {
  --Gray-500: hsl(234, 12%, 34%);
  --Gray-400: hsl(212, 6%, 44%);
  --White: hsl(0, 0%, 100%);
  --Red: hsl(0, 78%, 62%);
  --Cyan: hsl(180, 62%, 55%);
  --Blue: hsl(212, 86%, 64%);
  --Orange: hsl(34, 97%, 64%);
}

html {
  font-size: 62.5%; /* 1rem = 10px */
}

body {
  font-family: 'Poppins', 'Segoe UI', Arial, Helvetica, sans-serif;
}

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

@font-face {
  font-family: 'Poppins';
  src: url('fonts/Poppins-ExtraLight.woff2') format('woff2'),
  url('fonts/Poppins-ExtraLight.woff') format('woff');
  font-weight: 200;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Poppins';
  src: url('fonts/Poppins-Regular.woff2') format('woff2'),
  url('fonts/Poppins-Regular.woff') format('woff');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Poppins';
  src: url('fonts/Poppins-SemiBold.woff2') format('woff2'),
  url('fonts/Poppins-SemiBold.woff') format('woff');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

header {
  text-align: center;
}

h1 {
  font-weight: 200;
  font-size: 2.4rem;
  line-height: 140%;
  letter-spacing: 0.25px;
  color: var(--Gray-500);
  margin-top: 56px;
}

h1 span {
  display: block;
  font-weight: 600;
  font-size: 2.4rem;
  line-height: 140%;
  letter-spacing: 0.25px;
  color: var(--Gray-500);
}

header p {
  margin: 0 auto;
  font-size: 1.5rem;
  line-height: 140%;
  letter-spacing: 0;
  max-width: 316px;
  margin-top: 16px;
  margin-bottom: 60px;
  color: var(--Gray-500);
}

.center-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  grid-template-rows: repeat(4, auto);
  grid-template-areas: 
  "supervisor"
  "team-builder"
  "karma"
  "calculator";
  gap: 32px;
}

.card {
  position: relative;
  width: 314px;
  height: 250px;
  padding: 32px;
  border-radius: 8px;
  background-color: var(--White);
  box-shadow: 0 8px 20px 7px rgb(236, 236, 236);
}

.card.supervisor {
  grid-area: supervisor;
}

.card.team-builder {
  grid-area: team-builder;
}

.card.karma {
  grid-area: karma;
}

.card.calculator {
  grid-area: calculator;
}


.card .line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  border-radius: 8px 8px 0 0;
}

.line.cyan {
  background-color: var(--Cyan);
}

.line.red {
  background-color: var(--Red);
}

.line.orange {
  background-color: var(--Orange);
}

.line.blue {
  background-color: var(--Blue);
}

.card h2 {
  font-size: 2rem;
  font-weight: 600;
  line-height: 135%;
  letter-spacing: 0;
  color: var(--Gray-500);
  margin-bottom: 6px;
}

.card p {
  font-size: 1.3rem;
  line-height: 160%;
  letter-spacing: 0;
  color: var(--Gray-400);
  margin-bottom: 32px;
}

.card img {
  position: absolute;
  bottom: 46px;
  right: 32px;
}

.attribution {
  font-size: 13px; text-align: center;
  margin-top: 20px;
}

.attribution a {
  color: hsl(228, 45%, 44%);
}

@media (min-width: 688px) {
  h1 {
    font-size: 3.6rem;
    margin-top: 80px;
  }

  h1 span {
    font-size: 3.6rem;
  }

  header p {
    max-width: 540px;
    margin-bottom: 74px;
  }

  .grid-container {
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(3, 1fr);
    grid-template-areas: 
    ". supervisor supervisor ."
    "team-builder team-builder karma karma"
    ". calculator calculator .";
    width: 660px;
    height: 814px;
  }
}

@media (min-width: 1180px) {
  h1 {
    font-size: 3.6rem;
    margin-top: 102px;
  }

  .grid-container {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(4, 1fr);
    grid-template-areas: 
    ". team-builder ."
    "supervisor team-builder calculator"
    "supervisor karma calculator"
    ". karma .";
    width: 1114px;
    height: 532px;
  }

  .card {
    width: 350px;
  }
}