*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body{
  background-color: #0a0a0a;
  color: #fff;
  line-height: 1.8;
}
.progress-bar{
  position: fixed;
  top: 0;
  left: 0;
  height: 8px;
  background: linear-gradient(90deg, #6366f1, #8b5cf6);
  width: 0%;
  z-index: 1;
  transition: width 0.2s;
}
.badge{
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #111;
  border: 1px solid #222;
  padding: 8px 14px;
  border-radius: 20px;
  font-weight: 600;
  color: #6366f1;
  z-index: 100;
  transition: all 0.2s ease;
}
.badge, .complete{
  background: #6366f1;
  color: #fff;
  border-color: #6366f1;
}
.content{
  max-width: 640px;
  margin: 0 auto;
  padding: 80px 24px;
}
h1{
  font-size: 2.2rem;
  color: #fff;
  margin-bottom: 32px;
  line-height: 1.3;
}
h2{
  font-size: 1.4rem;
  color: #fff;
  margin: 40px 0 20px;
}
p{
  margin-bottom: 20px;
  font-size: 1.1rem;
}
.end{
  text-align: center;
  color: #555;
  margin-top: 60px;
  font-style: italic;
}