* {
  box-sizing: border-box;
}

body {
  font-family: 'Poppins', Arial, sans-serif;
  margin: 0;
  padding: 0 16px;
  background-color: #f4f4f4;
}

.home-link {
  display: inline-block;
  margin-top: 20px;
  color: #333;
  font-weight: 600;
  text-decoration: none;
}

.container {
  max-width: 520px;
  margin: 30px auto 50px;
  text-align: center;
  background: #fff;
  padding: 28px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
  font-size: 2.1em;
  margin: 0 0 16px;
  color: #333;
}

p {
  margin-bottom: 20px;
  color: #666;
}

form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

input[type='text'] {
  flex: 1 1 220px;
  padding: 12px 15px;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

button {
  flex: 0 0 auto;
  padding: 12px 20px;
  background-color: #4caf50;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
}

button:hover,
button:focus-visible {
  background-color: #3d8b40;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

#tracking-info {
  margin-top: 30px;
  padding: 20px;
  border: 1px solid #ccc;
  border-radius: 5px;
  background-color: #fafafa;
}

#tracking-info h2 {
  margin: 0 0 6px;
  font-size: 1.4em;
}

#tracking-info .summary {
  margin-bottom: 0;
}

#tracking-info.error h2 {
  color: #b3261e;
}

.timeline {
  list-style: none;
  padding: 0;
  position: relative;
  max-width: 320px;
  margin: 20px auto 0;
  text-align: left;
}

.timeline::before {
  content: '';
  background: #d4d9df;
  position: absolute;
  left: 20px;
  width: 2px;
  height: 100%;
}

.timeline li {
  margin: 20px 0;
  padding-left: 50px;
  position: relative;
}

.timeline li::before {
  content: '';
  background: #fff;
  position: absolute;
  border-radius: 50%;
  border: 3px solid #bbb;
  left: 11px;
  width: 20px;
  height: 20px;
}

.timeline li.complete::before {
  background: #4caf50;
  border-color: #4caf50;
}

.timeline li.current::before {
  box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.25);
}

.timeline h3 {
  margin: 0;
  font-size: 18px;
  color: #888;
}

.timeline li.complete h3 {
  color: #2e7d32;
}

.timeline p {
  margin: 4px 0 0;
  font-size: 14px;
  color: #666;
}