:root {
  /* Corporate Premium Palette */
  --co-primary: #3182CE;
  --co-primary-hover: #2B6CB0;
  --co-secondary: #4A5568;
  --co-accent: #E2E8F0;
  --co-bg-main: #F8F9FA;
  --co-bg-white: #FFFFFF;
  --co-text-main: #2D3748;
  --co-text-muted: #718096;
  --co-border: #EDF2F7;
  
  --co-sidebar-width: 260px;
  --co-navbar-height: 60px;
  --co-shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --co-shadow-md: 0 4px 6px rgba(0,0,0,0.03);
}

body {
  font-family: 'Inter', Helvetica, Arial, sans-serif;
  background-color: var(--co-bg-main);
  color: var(--co-text-main);
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  color: var(--co-text-main);
}

a {
  color: var(--co-primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--co-primary-hover);
}

/* Base Layout Structure */
.wrapper {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* Sidebar */
.sidebar {
  width: var(--co-sidebar-width);
  background-color: var(--co-bg-white);
  border-right: 1px solid var(--co-border);
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 1050;
  display: flex;
  flex-direction: column;
  box-shadow: var(--co-shadow-sm);
}

.sidebar-header {
  height: var(--co-navbar-height);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  border-bottom: 1px solid var(--co-border);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--co-primary);
  letter-spacing: -0.02em;
}

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

.sidebar-menu .nav-item {
  margin-bottom: 0.25rem;
}

.sidebar-menu .nav-link {
  color: var(--co-secondary);
  padding: 0.6rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-left: 3px solid transparent;
}

.sidebar-menu .nav-link:hover, .sidebar-menu .nav-link.active {
  background-color: var(--co-bg-main);
  color: var(--co-primary);
  border-left-color: var(--co-primary);
}

.sidebar-menu .nav-link i {
  font-size: 1.1rem;
}

/* Main Content area */
.main-content {
  margin-left: var(--co-sidebar-width);
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  min-height: 100vh;
  transition: all 0.3s;
}

/* Top Navbar */
.top-navbar {
  height: var(--co-navbar-height);
  background-color: var(--co-bg-white);
  border-bottom: 1px solid var(--co-border);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 1040;
}

.top-navbar .navbar-brand-mobile {
  display: none;
  font-weight: 700;
  color: var(--co-primary);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.user-profile img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--co-accent);
}

.user-profile .user-info {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.user-profile .user-name {
  font-weight: 600;
  font-size: 0.9rem;
}

.user-profile .user-role {
  font-size: 0.75rem;
  color: var(--co-text-muted);
}

/* Page Content */
.page-content {
  padding: 2rem;
  flex: 1;
}

.page-title {
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--co-text-main);
}

/* Card overrides for premium feel */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  background-color: var(--co-bg-white);
  border: 1px solid var(--co-border);
  border-radius: 0.5rem;
  box-shadow: var(--co-shadow-md);
  margin-bottom: 1.5rem;
  animation: fadeIn 0.4s ease-out forwards;
}

.card-header {
  background-color: var(--co-bg-white);
  border-bottom: 1px solid var(--co-border);
  padding: 1rem 1.5rem;
  font-weight: 600;
  color: var(--co-secondary);
}

.card-body {
  padding: 1.5rem;
}

/* Table styling for clinical/corporate look */
.table {
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
}

.table thead th {
  background-color: var(--co-bg-main);
  color: var(--co-text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--co-border);
  border-top: none;
  padding: 0.75rem 1rem;
}

.table tbody td {
  padding: 1rem;
  vertical-align: middle;
  border-bottom: 1px solid var(--co-border);
  color: var(--co-text-main);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table tbody tr:hover {
  background-color: rgba(49, 130, 206, 0.02);
}

/* Button overrides */
.btn {
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  transition: all 0.2s;
}

.btn-primary {
  background-color: var(--co-primary);
  border-color: var(--co-primary);
  box-shadow: 0 1px 2px rgba(49, 130, 206, 0.2);
}

.btn-primary:hover {
  background-color: var(--co-primary-hover);
  border-color: var(--co-primary-hover);
}

.btn-outline-secondary {
  color: var(--co-secondary);
  border-color: var(--co-border);
}

.btn-outline-secondary:hover {
  background-color: var(--co-bg-main);
  color: var(--co-text-main);
  border-color: var(--co-border);
}

/* Inputs and Forms */
.form-control, .form-select {
  border-radius: 0.375rem;
  border: 1px solid var(--co-border);
  padding: 0.5rem 0.75rem;
  color: var(--co-text-main);
}

.form-control:focus, .form-select:focus {
  border-color: var(--co-primary);
  box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
}

.form-label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--co-secondary);
  margin-bottom: 0.4rem;
}

@media (max-width: 991.98px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  
  .sidebar.show {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .top-navbar .navbar-brand-mobile {
    display: block;
  }
}