:root {
  --col-bg: #f2f2f2;
  --col-on-bg: #333;
  --col-active: orangered;
  --col-disble: #c3c3c3;
}

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

html {
  font-size: 100%;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  font-size: 1.5rem;
  background-color: var(--col-bg);
}

.container {
  text-align: center;
}

.progress-container {
  position: relative;
  display: flex;
  justify-content: space-between;
  width: 300px;
  margin-bottom: 20px;
}

.progress-container::before {
  content: "";
  position: absolute;
  height: 4px;
  width: 100%;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--col-disble);
  z-index: 3;
}

.progress {
  position: absolute;
  height: 4px;
  width: 0%;
  top: 50%;
  transform: translateY(-50%);
  background-color: orangered;
  z-index: 5;
  transition: 0.4s ease-in;
}

.circle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  padding: 10px;
  background-color: white;
  border: 3px solid var(--col-disble);
  color: #333;
  z-index: 10;
  transition: 0.4s ease-in;
}

.circle.active {
  border-color: var(--col-active);
  color: var(--col-active);
}

.number {
  font-size: 0.9rem;
}

/* Button style BELOW */

.btn-container {
  display: flex;
  justify-content: center;
}

.btn {
  margin-right: 10px;
  border: none;
  border-radius: 100px;
  outline: none;
  padding: 6px 12px;
  color: gray;
  font-size: 0.6rem;
  font-weight: bold;
  background-color: var(--col-active);
  color: white;
  cursor: pointer;
  transition: 0.1s ease-in;
}

.btn:hover {
  transform: scale(1.05);
}

.btn:active {
  transform: scale(0.95);
}

.btn:disabled {
  background-color: var(--col-disble);
  cursor: not-allowed;
}