/* Header */
header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  padding: 20px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
}

header h1 {
  font-size: 24px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

header .user-info {
  display: flex;
  align-items: center;
  gap: 15px;
}

header .user-info span {
  font-size: 14px;
}

header .user-info .avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

header .user-info .avatar:hover {
  background-color: rgba(255,255,255,0.3);
}

@media (max-width: 768px) {
  header {
    flex-direction: column;
    gap: 15px;
  }

  header h1 {
    font-size: 18px;
  }
}