:root {
  --bg-body: #f8f9fa; /* Off-white */
  --bg-sidebar: #1f1437; /* Dark purple */
  --bg-sidebar-hover: #322550;
  --text-sidebar: #e2dbea;
  --text-sidebar-active: #ffffff;
  --accent-color: #6c5ce7;
  --card-bg: #ffffff;
  --card-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
  --border-radius: 16px;
  --transition-speed: 0.3s;
}

html, body {
  height: 100%;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-body);
  color: #333;
  overflow-x: hidden;
}

/* Sidebar Layout container */
.app-wrapper {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar Styles */
.sidebar {
  width: 260px;
  background: var(--bg-sidebar);
  color: var(--text-sidebar);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-speed) cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 4px 0 15px rgba(0, 0, 0, 0.1);
  z-index: 1040;
}

.sidebar-header {
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.sidebar-menu {
  flex: 1;
  padding: 20px 0;
  overflow-y: auto;
}

.sidebar-menu::-webkit-scrollbar {
  width: 5px;
}
.sidebar-menu::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.2);
  border-radius: 10px;
}

.sidebar-nav-item {
  padding: 0 15px;
  margin-bottom: 8px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  color: var(--text-sidebar);
  text-decoration: none;
  border-radius: 12px;
  transition: all var(--transition-speed);
  font-weight: 500;
}

.sidebar-link i {
  font-size: 1.25rem;
  margin-right: 15px;
  transition: all var(--transition-speed);
}

.sidebar-link:hover, .sidebar-link.active {
  background: var(--bg-sidebar-hover);
  color: var(--text-sidebar-active);
  transform: translateX(4px);
}

.sidebar-link.active {
  background: linear-gradient(135deg, var(--accent-color) 0%, #4834d4 100%);
  box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 15px;
}

.user-profile-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.user-profile-name {
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-logout {
  width: 100%;
  padding: 10px;
  background: rgba(255,255,255,0.05);
  color: white;
  border: none;
  border-radius: 10px;
  transition: background var(--transition-speed);
}
.btn-logout:hover {
  background: rgba(255,255,255,0.15);
  color: white;
}

/* Main Content Area */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transition: all var(--transition-speed);
}

.top-navbar {
  background: transparent;
  padding: 15px 30px;
  display: flex;
  align-items: center;
}

/* Sidebar Toggle for Mobile */
.sidebar-toggler {
  display: none;
  background: white;
  border: none;
  color: #333;
  font-size: 1.5rem;
  padding: 5px 10px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  cursor: pointer;
}

.content-wrapper {
  padding: 20px 30px;
  flex: 1;
}

/* Cards & UI Elements */
.card {
  background: var(--card-bg);
  border: none;
  border-radius: var(--border-radius);
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  margin-bottom: 24px;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
}

.card-header {
  background: transparent;
  border-bottom: 1px solid rgba(0,0,0,0.05);
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1.1rem;
}

.card-body {
  padding: 24px;
}

.btn-primary {
  background: var(--accent-color);
  border-color: var(--accent-color);
  border-radius: 10px;
  padding: 10px 20px;
  font-weight: 500;
  transition: all var(--transition-speed);
}

.btn-primary:hover {
  background: #5b4bc4;
  border-color: #5b4bc4;
  box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
  transform: translateY(-2px);
}

.form-control {
  border-radius: 10px;
  padding: 12px 15px;
  border: 1px solid #e1e5eb;
  transition: all var(--transition-speed);
}

.form-control:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.1);
}

/* Public Navbar (when NOT logged in) */
.public-navbar {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.public-navbar .navbar-brand {
  color: var(--bg-sidebar);
  font-weight: 700;
}

.public-navbar .nav-link {
  color: #555;
  font-weight: 500;
}
.public-navbar .nav-link:hover {
  color: var(--accent-color);
}

/* Animations */
.fade-in {
  animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Mobile Responsiveness */
@media (max-width: 991.98px) {
  .sidebar {
    position: fixed;
    height: 100%;
    transform: translateX(-100%);
  }
  
  .sidebar.show {
    transform: translateX(0);
  }
  
  .sidebar-toggler {
    display: inline-block;
  }
  
  .content-wrapper {
    padding: 15px;
  }
}