:root {
  --primary-color: #4F46E5;
  --secondary-color: #10B981;
  --background-color: #F3F4F6;
  --surface-color: #FFFFFF;
  --text-color: #111827;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 80px;
  background-color: var(--surface-color);
  padding: 1rem 0;
  transition: width 0.3s ease;
  z-index: 1000;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  border-right: 1px solid #e5e7eb;
}

.sidebar.expanded {
  width: 250px;
}

.sidebar .nav-link {
  display: flex;
  align-items: center;
  padding: 0.75rem 1.5rem;
  color: #6b7280;
  text-decoration: none;
  white-space: nowrap;
}

.sidebar .nav-link .icon {
  width: 1.5rem;
  height: 1.5rem;
  margin-right: 1rem;
  flex-shrink: 0;
}

.sidebar .nav-link .link-text {
  opacity: 0;
  transition: opacity 0.2s ease-in-out;
}

.sidebar.expanded .nav-link .link-text {
  opacity: 1;
}

.sidebar .nav-link:hover {
  color: var(--primary-color);
  background-color: #f9fafb;
}

.sidebar .logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    margin-bottom: 1rem;
}

.sidebar .logo {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    border-radius: 50%;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.5rem;
    flex-shrink: 0;
}


.sidebar-toggle {
  position: absolute;
  bottom: 1rem;
  left: 1.5rem;
  background: none;
  border: none;
  color: #6b7280;
  padding: 0.5rem;
}

.sidebar.expanded .sidebar-toggle {
    left: auto;
    right: 1rem;
}

.main-content {
  margin-left: 80px;
  padding: 2rem;
  transition: margin-left 0.3s ease;
}

.main-content.expanded {
  margin-left: 250px;
}

@media (max-width: 768px) {
  .sidebar {
    width: 0;
    padding: 0;
  }
  .sidebar.expanded {
    width: 250px;
  }
  .main-content {
    margin-left: 0;
  }
  .main-content.expanded {
    margin-left: 0; /* Or a semi-transparent overlay */
  }
}