* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  :root {
    --card-color-primary: #f7dd43;
    --card-title-border-color: #746615;
    --card-bg-color: #1d1c19;
  
    --bg: url(./assets/bg-yellow.svg)
  }
  
  body.yellow {
    --card-color-primary: #f7dd43;
    --card-title-border-color: #746615;
    --card-bg-color: #1d1c19;
  
    --bg: url(./assets/bg-yellow.svg)
  }
  
  body.blue {
    --card-color-primary: #338af3;
    --card-title-border-color: #338af3;
    --card-bg-color: #202024;
  
    --bg: url(./assets/bg-blue.svg)
  }
  
  body.green {
    --card-color-primary: #047C3F;
    --card-title-border-color: #047C3F;
    --card-bg-color: #1a1f1b;
  
    --bg: url(./assets/bg-green.svg)
  }
  
  ul { 
    list-style: none;
  }
  
  body {
    background-color: #121214;
    background-image: var(--bg);
    background-position: top center;
    background-repeat: no-repeat;
    background-size: 100vw;
  }
  
  body * {
    font-family: 'Roboto', sans-serif;
  }
  
  #app {
    width: fit-content;
    margin: auto;
    padding-top: 52px;
  }
  
  header {
    margin-bottom: 24px;
    text-align: center;
  }
  
  .buttons {
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 8px;
  
    margin-bottom: 63px;
  }
  
  .button {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
  
    background-color: var(--card-bg-color);
    border: 1px solid var(--card-title-border-color);
    border-radius: 4px;
  
    padding: 4px;
    cursor: pointer;
  }
  
  .button button {
    background: none;
    border: none;
    color: #e1e1e6;
    cursor: pointer;
  }
  
  .button#yellow:hover {
    border-color: #f7dd43;
  }
  
  .button#blue:hover {
    border-color: #338af3;
  }
  
  .button#green:hover {
    border-color: #047C3F;
  }
  
  #cards {
    display: flex;
    flex-direction: column;
    gap: 32px;
  
    padding-bottom: 24px;
  }
  
  .card {
    padding: 32px 23px;
    text-align: center;
  
    background-color: var(--card-bg-color);
    border-bottom: 2px solid var(--card-color-primary);
    border-radius: 6px;
  
    animation: appear 3s;
  }
  
  .card h2 {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
     
    padding: 8px 16px;
    border: 1px solid var(--card-title-border-color);
    border-radius: 6px;
  
    width: fit-content;
    margin: auto;
    margin-bottom: 53px;
  
    color: #f7dd43;
    cursor: default;
  }
  
  .card h2 span {
    color: #e1e1e6;
    font-size: 14px;
    text-transform: uppercase;
  }
  .card ul {
    display: flex;
    flex-direction: column;
    gap: 24px;
  
    width: 270px;
  }
  
  .card ul li {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .card ul li + li {
    /* um li que tenha um li anterior a ele */
    padding-top: 24px;
    border-top: 1px solid #323238;
  }
  
  .card ul li strong {
    font-weight: 900;
    font-size: 36px;
    line-height: 125%;
    color: #e1e1e6;
  
    cursor: default;
  }
  
  .card h2:hover,
  .card ul li strong:hover,
  .card ul li img:hover,
  .button:hover {
    transform: scale(1.1);
  }
  
  .card h2,
  .card ul li strong,
  .card ul li img {
    transition: transform 0.3s;
  }
  
  *::-webkit-scrollbar {
    width: 6px;
  }
  
  *::-webkit-scrollbar-track {
    background: var(--bg);
  }
  
  *::-webkit-scrollbar-thumb {
    background-color: var(--card-color-primary);
    border-radius: 2rem;
  }
  
  @keyframes appear {
    0% {
      transform: translateY(-50px);
      opacity: 0;
    }
  
    100% {
      opacity: 1;
    }
  }
  
  @media (min-width: 700px) {
    #cards {
      max-width: 670px;
      flex-direction: row;
      flex-wrap: wrap;
    }
  }