body {
  font-family: Arial, sans-serif;
  background-color: #ffffff;
  margin: 0;
  padding: 0;
}

.timeline {
  position: relative;
  max-width: 600px;
  margin: 20px auto;
  padding: 10px 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  width: 0;
  background-color: #e9ecef;
  top: 0;
  bottom: 0;
  left: 20px;
}

.timeline-phase {
  margin-bottom: 40px;
}

.timeline-phase h3 {
  margin-left: 40px;
}

.timeline-event {
  position: relative;
  margin: 10px 0;
}

.timeline-content {
  display: flex;
  align-items: center;
  background-color: white;
  padding: 10px 0px;
  border-radius: 6px;
  margin-left: 40px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  position: relative;
}

.timeline-content .bullet {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 24px;
  height: 24px;
  background-color: #E9ECEF;
  border: 2px solid #3498db;
  border-radius: 50%;
  position: absolute;
  left: -42px;
}

.timeline-content .bullet .date {
  font-size: 10px;
  color: #3498db;
  text-align: center;
  padding: 2px;
}

.text-content {
  flex-grow: 1;
  padding-left: 20px;
}

.details {
  display: none;
  margin: 10px 10px 10px 0;
  padding: 10px 10px 10px 20px;
  background-color: #e3f2fd;
  border-radius: 6px;
}

.timeline-content p {
  margin: 5px 0;
}

.timeline-date {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background-color: #a0bfe6;
  color: white;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 0.8em;
  margin-right: 20px;
  text-align: center;
  overflow: hidden;
  position: absolute;
  left: -50px;
  top: 4px;
  font-size: 1em;
}

.timeline-date .month {
  font-size: 9px;
  width: 100%;
  background-color: #4c97d2;
  padding: 2px 0;
}

.timeline-date .day {
  font-size: 9px;
  position: relative;
  top: 2px;
  z-index: 1;
}