design.css

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

  --primary: rgb(255, 137, 26);
  --secondary: rgb(128,128,128);
  --dark: rgb(24, 23, 23);
  --dark-1: rgb(41,41,41);
  --light: rgb(238, 238, 238);
  --success: rgb(38, 151, 43);
  --danger: rgb(175, 43, 43);
}

body {
  font-family: Helvetica, sans-serif;
  background: var(--dark);
}

.app {
  height: 100vh;
  padding: 0 1rem;
  display: flex;
  flex-flow: column;
  align-items: center;
  justify-content: space-around;
}

/* CLASS UTILITIES & OVERRIDES START */

.header {
  font-size: 1.5em;
  font-weight: 800;
  color: var(--light);
}

.header--primary {
  color: var(--primary);
}

.header--secondary {
  color: var(--secondary);
}

.btn {
  border: none;
  padding: 1em 1.5em;
  color: black;
  cursor: pointer;
  font-weight: 800;
  border-radius: 5px;
  transition: 0.4s ease-out;
  background: var(--light);
}

.btn:hover {
  background: var(--primary);
}

/* CLASS UTILITIES & OVERRIDES START */

/* MAIN SECTION START */

.loader {
  display: flex;
  flex-flow: row wrap;
  justify-content: center;
  align-items: baseline;
  text-align: center;
}

.joke {
  margin: 4rem 0;
  display: flex;
  flex-flow: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.joke__setup {
  color: var(--primary);
  margin-bottom: 2rem;
  font-style: italic;
  line-height: 2rem;
}

.joke__delivery {
  color: var(--secondary);
  margin-bottom: 5rem;
}

.dot-flashing-container {
  display: flex;
  margin-left: 0.5rem;
}

.dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background-color: var(--primary);
  animation: dotFlashing 1s infinite linear alternate;
  margin: 0 0.1rem;
}

.dot--1 {
  animation-delay: .5s;
}

.dot--2 {
  animation-delay: 0s;
}

.dot--3 {
  animation-delay: 1s;
}

/* MAIN SECTION END */


/* TOGGLE CLASSES */

.hide {
  display: none;
}

/* ANIMATION STYLES */

@keyframes dotFlashing {
  0% {
    background-color: var(--primary);
  }
  50%,
  100% {
    background-color: var(--secondary);
  }
}