ul, li {
  list-style: none;
  padding: 0;
}

body {
  font-family: 'Poppins', sans-serif;
  margin: 0;
  padding: 0;
  background: linear-gradient(45deg, #209cff, #68e0cf);
  color: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background: #eaf6ff;
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  max-width: 600px;
  width: 100%;
  box-sizing: border-box;
}

h1 {
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: 1rem;
}

.dropdown {
  margin-bottom: 1rem;
  position: relative;
}

.dropdown button {
  background: #4e5ed3;
  color: white;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  width: 100%;
}

.dropdown-content {
  display: none;
  flex-direction: column;
  background: white;
  border: 1px solid #ccc;
  border-radius: 5px;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 10;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.dropdown-content input {
  padding: 0.5rem;
  margin: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 5px;
  width: calc(100% - 1rem);
  box-sizing: border-box;
}

.dropdown-content button {
  background: #f8f9fa;
  border: none;
  padding: 0.5rem;
  border-radius: 5px;
  margin: 0.2rem;
  cursor: pointer;
  text-align: left;
  color: #333;
  font-weight: bold;
}

.dropdown-content button.hidden {
  display: none;
}

.dropdown-content button:hover {
  background: #e0e0e0;
}

.sessions {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 2px solid #abaaed;
}

.sessions li {
  padding: 1rem 0 1rem 1.5rem;
  position: relative;
}

.sessions li:not(:last-child) {
  margin-bottom: 1rem;
}

.sessions li:before {
  content: "";
  width: 15px;
  height: 15px;
  background: white;
  border: 2px solid #4e5ed3;
  border-radius: 50%;
  position: absolute;
  left: -9px;
  top: 1.5rem;
}

.completed-circle::before {
  background: #28a745;
}

.time {
  font-weight: bold;
  color: #2a2839;
}

p {
  margin: 0.5rem 0 0;
  color: #4f4f4f;
}

button.task-button {
  margin-right: 5px;
  background: #4e5ed3;
  color: white;
  border: none;
  padding: 0.3rem 0.5rem;
  border-radius: 5px;
  cursor: pointer;
}

button.task-button.completed {
  background: #28a745;
}

@media screen and (max-width: 768px) {
  h1 {
    font-size: 1.2rem;
  }

  .sessions li {
    padding: 0.75rem 0 0.75rem 1rem;
  }

  .time {
    font-size: 0.85rem;
  }

  p {
    font-size: 0.9rem;
  }

  button.task-button {
    padding: 0.2rem 0.4rem;
    font-size: 0.8rem;
  }

  .dropdown button {
    font-size: 0.9rem;
    padding: 0.4rem;
  }

  .dropdown-content input {
    font-size: 0.85rem;
    padding: 0.4rem;
  }
}

@media screen and (max-width: 480px) {
  h1 {
    font-size: 1rem;
  }

  .sessions li {
    padding: 0.5rem 0 0.5rem 0.8rem;
  }

  .time {
    font-size: 0.75rem;
  }

  p {
    font-size: 0.8rem;
  }

  button.task-button {
    margin-right: 3px;
    padding: 0.2rem 0.3rem;
    font-size: 0.75rem;
  }

  .dropdown button {
    font-size: 0.8rem;
    padding: 0.3rem;
  }

  .dropdown-content input {
    font-size: 0.75rem;
    padding: 0.3rem;
  }
}