@import url("https://fonts.googleapis.com/css2?family=Muli&display=swap");

* {
  --blue-dark: #001e31;
  --blue-medium: #1f3644;
  --teal-dark: #24a390;
  --teal-medium: #08c6ab;
  --teal-light: #5affe7;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--blue-dark);
  color: var(--blue-medium);
  font-family: "Muli", sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
}

.container {
  text-align: center;
}

.imgContainer {
  display: flex;
  max-width: 225px;
  margin: 4rem auto;
}

.imgContainer img.signature {
  opacity: 0.125;
  max-width: 100%;
  transition: opacity 0.5s ease-in;
}
img.signature:hover {
  opacity: 0.75;
}

.progressContainer {
  display: flex;
  justify-content: space-between;
  position: relative;
  margin-bottom: 40px;
  max-width: 100%;
  width: 350px;
}

.progressContainer::before {
  content: "";
  background-color: var(--blue-medium);
  position: absolute;
  top: 50%;
  left: 0;
  height: 4px;
  width: 100%;
  transform: translateY(-50%);
  z-index: -1;
}

.progress {
  content: "";
  background-color: var(--teal-medium);
  position: absolute;
  top: 50%;
  left: 0;
  height: 4px;
  width: 0%;
  transform: translateY(-50%);
  z-index: -1;
  transition: 0.5s ease;
}

.circle {
  background-color: var(--blue-dark);
  border-radius: 50%;
  height: 30px;
  width: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--blue-medium);
  transition: all 0.5s ease-in;
}

.circle:hover {
  border-color: var(--teal-medium);
  color: var(--teal-medium);
}

.circle.active {
  border-color: var(--teal-medium);
  color: var(--teal-medium);
  position: relative;
}

.circle.active.glowing::before {
  content: "";
  position: absolute;
  top: -3px;
  left: -3px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  box-shadow: 0 0 1px #50f2f5, 0 0 3px #50f2f5, 0 0 20px rgba(80, 242, 245, 0.7);
}

button {
  background-color: var(--teal-dark);
  color: var(--blue-dark);
  font-weight: bold;
  border: 0;
  border-radius: 5px;
  cursor: pointer;
  padding: 10px 30px;
  margin: 5px;
  font-size: 14px;
  transition: all 0.3s ease-in, transform ease;
}

button:active {
  transform: scale(0.97);
}

button:focus {
  outline: 0;
}

button:hover {
  background-color: var(--teal-medium);
}

button:disabled {
  cursor: not-allowed;
  background-color: var(--blue-medium);
}

@keyframes glow {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
.circle.active.glowing::before {
  animation-name: glow;
  animation-duration: 1.5s;
  animation-direction: alternate;
  animation-iteration-count: infinite;
  animation-timing-function: ease-in;
}