* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

body {
  margin: 0;
  display: flex;
  height: 100vh;
  background-color: #f5f6fa;
  color: #2c3e50;
}

.sidebar {
  width: 280px;
  background: linear-gradient(180deg, #2c3e50 0%, #3498db 100%);
  color: white;
  padding: 1.5rem;
  box-shadow: 2px 0 15px rgba(0,0,0,0.1);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.profile-section {
  text-align: center;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  backdrop-filter: blur(10px);
}

.profile-image {
  width: 100px;
  height: 100px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid rgba(255, 255, 255, 0.3);
}

.profile-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-name {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.profile-email {
  font-size: 0.9rem;
  opacity: 0.8;
}

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

.search-box input {
  width: 100%;
  padding: 0.8rem 1rem 0.8rem 2.5rem;
  border: none;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 0.9rem;
}

.search-box input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.search-box i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255, 255, 255, 0.7);
}

.sidebar h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.2);
}

ul {
  list-style: none;
  padding: 0;
  margin: 0;
  overflow-y: auto;
  max-height: calc(100vh - 300px);
}

li {
  position: relative;
  padding: 0.8rem 1rem;
  margin: 0.4rem 0;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

li:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateX(5px);
}

.delete-btn {
  background: none;
  border: none;
  color: #e74c3c;
  font-size: 1rem;
  cursor: pointer;
  opacity: 0;
  transition: all 0.3s ease;
  padding: 8px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
}

.delete-btn i {
  transition: all 0.3s ease;
}

.delete-btn:hover {
  background: rgba(231, 76, 60, 0.1);
  transform: scale(1.1);
}

.delete-btn:hover i {
  transform: rotate(15deg);
}

li:hover .delete-btn {
  opacity: 1;
}

.content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.logout-btn {
  background: #e74c3c;
  color: white;
  border: none;
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}

.logout-btn:hover {
  background: #c0392b;
  transform: translateY(-2px);
}

.stats-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: white;
  padding: 1.5rem;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.stat-card i {
  font-size: 2rem;
  color: #3498db;
  background: rgba(52, 152, 219, 0.1);
  padding: 1rem;
  border-radius: 12px;
}

.stat-info h4 {
  font-size: 0.9rem;
  color: #7f8c8d;
  margin-bottom: 0.5rem;
}

.stat-info p {
  font-size: 1.5rem;
  font-weight: 600;
  color: #2c3e50;
}

.upload-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.upload-card {
  background: white;
  padding: 1.5rem;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.upload-card h4 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  color: #2c3e50;
}

.upload-area {
  border: 2px dashed #bdc3c7;
  border-radius: 10px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.upload-area.dragover {
  border-color: #3498db;
  background: rgba(52, 152, 219, 0.1);
}

.upload-area input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.upload-content {
  pointer-events: none;
}

.upload-content i {
  font-size: 2.5rem;
  color: #3498db;
  margin-bottom: 1rem;
}

.upload-content p {
  color: #7f8c8d;
  font-size: 0.9rem;
}

.upload-btn {
  width: 100%;
  padding: 0.8rem;
  background: #3498db;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
  transition: all 0.3s ease;
}

.upload-btn:hover {
  background: #2980b9;
  transform: translateY(-2px);
}

#uploadStatus, #weightUploadStatus {
  margin-top: 1rem;
  font-size: 0.9rem;
  text-align: center;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}