:root {
  --border-color: rgb(83, 83, 83);

  --primary-color: rgb(20, 20, 20);
  --secondary-color: rgb(26, 26, 26);

  --success-color: rgb(101, 255, 84);
  --success-color-accent: rgb(91, 229, 75);
}

body {
  margin: 0;
  background-color: var(--primary-color);
  overflow-x: hidden;
}

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

* {
  font-family: system-ui;
}

.std-btn {
  border: none;
  border-radius: 5px;

  cursor: pointer;

  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.success-btn {
  background-color: var(--success-color);
  box-shadow: 0px 4px var(--success-color-accent);
}

.success-btn:active {
  box-shadow: 0px 2px var(--success-color-accent);
  transform: translateY(2px);
}