:root {
  --text-color: black;
  --bg-color: white;
}

:root.dark {
  --text-color: rgba(255, 255, 255, 0.75);
  --bg-color: black;

  .clock {
    font-weight: 100;
  }

  button {
    border: none;
    background: none;
    font-weight: 200;


    &.active {
      color: var(--text-color);
      font-weight: 600;
    }
  }
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: Arial, sans-serif;
  margin: 0;
  transition: background 0.5s, color 0.5s;
}

button {
  background: var(--bg-color);
  color: var(--text-color);
  margin: 5px;
  font-size: 18px;
  cursor: pointer;
  border: 2px solid var(--text-color);
  border-radius: 2px;

  &.active {
    background: var(--text-color);
    color: var(--bg-color);
  }

  &#theme {
    border: none;
  }
}

#start {
  min-width: 68px;
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100vh;
  justify-content: center;
}

.clock {
  font-size: 72px;
  font-weight: bold;
  margin: 20px 0;
  display: flex;

  #minutes,
  #seconds {
    width: 80px;
  }
}

.fullscreen {
  margin-top: 80px;

  button {
    font-size: 12px;
    font-weight: 500;
  }
}