:root {
  /* Grayscale color palette */
  --primary: #505050;         /* Medium gray as primary */
  --primary-dark: #333333;    /* Darker gray */
  --secondary: #707070;       /* Light-medium gray */
  --success: #4a4a4a;         /* Success gray */
  --info: #606060;            /* Info gray */
  --warning: #909090;         /* Warning light gray */
  --danger: #404040;          /* Danger dark gray */
  --light: #f8f8f8;           /* Very light gray */
  --dark: #202020;            /* Very dark gray */
  --gray: #a0a0a0;            /* Medium gray */
  --gray-dark: #505050;       /* Dark gray */
  --gray-light: #e0e0e0;      /* Light gray */
  --body-bg: #f5f5f5;         /* Background light gray */
  --sidebar-bg: #303030;      /* Sidebar dark gray */
  --sidebar-width: 260px;
  --sidebar-item: #c0c0c0;    /* Sidebar item light gray */
  --sidebar-hover: rgba(255, 255, 255, 0.1);
  --card-bg: #ffffff;
  --card-border: #eeeeee;     /* Card border light gray */
  --card-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.05);  /* Subtle shadow */
  --default-font-family: "Nunito Sans", 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --transition: all 0.2s ease-in-out;
  --border-radius: 0.5rem;    /* Rounded corners */
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--default-font-family);
  background-color: var(--body-bg);
  color: #3c4b5f;
  line-height: 1.5;
  font-size: 0.8125rem; /* Smaller base font size */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  letter-spacing: 0.01em;
}

/* App Structure */
#app {
  min-height: 100vh;
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: all 0.3s;
}

.main-content.with-sidebar {
  margin-left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
}

main {
  flex: 1;
}

/* Sidebar (Nova Style) */
.sidebar {
  position: fixed;
  width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--sidebar-bg);
  color: #fff;
  z-index: 100;
  overflow-y: auto;
  transition: all 0.3s;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.15);
}

.sidebar-header {
  padding: 1.75rem 1.5rem 1.25rem;
}

.sidebar-brand {
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  display: flex;
  align-items: center;
  letter-spacing: 0.01em;
}

.sidebar-brand:hover {
  color: #fff;
  opacity: 0.9;
}

.sidebar-brand i {
  font-size: 1.3rem;
  margin-right: 0.75rem;
  color: var(--secondary);
}

.sidebar-user {
  padding: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  margin-bottom: 0.5rem;
}

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%; /* Ensure perfect circle */
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 12px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.user-avatar i {
  font-size: 1.5rem;
  color: var(--secondary);
}

.user-details {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-weight: 600;
  margin-bottom: 4px;
  font-size: 0.9375rem;
}

.user-role {
  font-size: 0.8125rem;
  opacity: 0.8;
  color: var(--secondary);
}

.sidebar-nav {
  list-style: none;
  padding: 1rem 0;
  margin: 0;
}

.nav-section {
  font-size: 0.6875rem;
  text-transform: uppercase;
  padding: 1.25rem 1.5rem 0.5rem;
  color: var(--sidebar-item);
  letter-spacing: 0.05em;
  font-weight: 600;
}

.nav-item {
  margin: 0;
  padding: 0;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 0.75rem 1.5rem;
  color: var(--sidebar-item);
  text-decoration: none;
  transition: var(--transition);
  border-left: 3px solid transparent;
  font-size: 0.875rem;
  font-weight: 400; /* Remove bold font */
}

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

.nav-item.active .nav-link {
  background-color: rgba(64, 153, 222, 0.15);
  color: #ffffff;
  border-left: 3px solid var(--primary);
}

.nav-link i {
  width: 20px;
  margin-right: 12px;
  font-size: 0.9375rem;
}

.logout-item {
  margin-top: 2rem;
}

.logout-item .nav-link {
  color: #ef4444;
}

.logout-item .nav-link:hover {
  background-color: rgba(227, 52, 47, 0.1);
}

/* Top Navbar (Nova Style) */
.top-navbar {
  background-color: #fff;
  border-bottom: 1px solid var(--card-border);
  padding: 0.875rem 1.5rem;
  display: flex;
  align-items: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
  position: sticky;
  top: 0;
  z-index: 99;
}

.top-navbar .container-fluid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.top-navbar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link-top {
  color: var(--gray-dark);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  letter-spacing: 0.01em;
}

.nav-link-top:hover {
  background-color: var(--light);
  color: var(--primary);
}

.page-title {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--dark);
  letter-spacing: 0.01em;
}

.breadcrumb {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  color: var(--gray);
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  padding: 0 0.5rem;
  color: var(--gray-light);
}

.breadcrumb-item a {
  color: var(--primary);
  text-decoration: none;
}

.breadcrumb-item.active {
  color: var(--gray-dark);
  font-weight: 600;
}

/* Cards (Updated Style) */
.card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  border: 1px solid var(--card-border);
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.03); /* Subtle shadow */
  margin-bottom: 1.25rem;
  overflow: hidden;
  transition: transform 0.2s ease;
}

.card:hover {
  transform: translateY(-1px);
}

.card-header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--card-border);
  padding: 0.875rem 1.25rem;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header-with-border {
  border-left: 3px solid var(--primary);
}

.card-body {
  padding: 1.25rem;
}

.card-footer {
  background-color: var(--light);
  border-top: 1px solid var(--card-border);
  padding: 1rem 1.5rem;
}

/* Buttons (Nova Style) */
.btn {
  font-weight: 600;
  border-radius: 0.375rem;
  padding: 0.5rem 1.25rem;
  transition: all 0.2s ease;
  border: none;
  letter-spacing: 0.01em;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.btn-primary {
  background-color: var(--primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-outline-primary {
  border: 1px solid var(--primary);
  color: var(--primary);
  background: transparent;
}

.btn-outline-primary:hover {
  background-color: var(--primary);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-sm {
  padding: 0.375rem 1rem;
  font-size: 0.8125rem;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-icon i, .btn-icon svg {
  margin-right: 0.5rem;
}

/* Forms */
.form-control {
  border: 1px solid var(--gray-light);
  border-radius: 0.375rem;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 0.125rem rgba(64, 153, 222, 0.25);
  outline: 0;
}

.form-label {
  font-weight: 600;
  color: var(--gray-dark);
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

.input-group-text {
  background-color: var(--light);
  border: 1px solid var(--gray-light);
  color: var(--gray-dark);
  border-right: none;
  border-radius: 0.375rem 0 0 0.375rem;
}

.input-group .form-control {
  border-left: none;
  border-radius: 0 0.375rem 0.375rem 0;
}

.form-check-input {
  width: 1.125rem;
  height: 1.125rem;
  margin-top: 0.25rem;
  border: 1px solid var(--gray-light);
  border-radius: 0.25rem;
  transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out;
}

.form-check-input:checked {
  background-color: var(--primary);
  border-color: var(--primary);
}

.form-check-label {
  font-size: 0.875rem;
  color: var(--gray-dark);
}

/* Updated metrics cards */
.metrics-card {
  background-color: white;
  border-radius: var(--border-radius);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  height: 100%;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  border: 1px solid var(--card-border);
  transition: transform 0.2s ease;
}

.metrics-card:hover {
  transform: translateY(-1px);
}

.metrics-card-title {
  font-weight: 600;
  color: var(--gray-dark);
  margin-bottom: 0.75rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.metrics-card-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.metrics-card-subtitle {
  font-size: 0.75rem;
  color: var(--gray);
  display: flex;
  align-items: center;
}

.metrics-card-subtitle i {
  margin-right: 0.25rem;
}

/* Page Header (Beautiful Card Style) */
.page-header-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  border: 1px solid var(--card-border);
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  margin-bottom: 0.5rem;
  padding: 1rem;
  position: relative;
  overflow: hidden;
}

.page-header-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background-color: var(--primary);
}

.page-header-card h4 {
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--dark);
  margin-bottom: 0.5rem;
}

.page-header-card p {
  font-size: 0.8125rem;
  color: var(--gray);
  margin-bottom: 0;
}

/* Nova style utility classes */
.text-primary {
  color: var(--primary) !important;
}

.bg-primary {
  background-color: var(--primary) !important;
}

/* Footer (Nova Style) */
.footer-nova {
  font-size: 0.8125rem;
  padding: 1rem 1.5rem;
  color: var(--gray);
  background-color: white;
  border-top: 1px solid var(--card-border);
  display: flex;
  margin-top: auto;
}

.footer-nova .container-fluid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.version {
  opacity: 0.7;
  font-weight: 500;
  color: var(--gray-dark);
}

.footer-nova a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-nova a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* Authentication Pages (Nova Style) */
.auth-container {
  max-width: 450px;
  margin: 3rem auto;
}

.auth-card {
  box-shadow: 0 4px 25px rgba(0, 0, 0, 0.05);
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--card-border);
  background-color: white;
}

.auth-header {
  text-align: center;
  padding: 2.5rem 0 1.5rem;
}

.auth-logo {
  margin-bottom: 1.5rem;
  display: inline-block;
}

.auth-title {
  font-weight: 700;
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--dark);
  letter-spacing: 0.01em;
}

.auth-subtitle {
  color: var(--gray);
  font-size: 0.9375rem;
  line-height: 1.5;
  max-width: 80%;
  margin: 0 auto;
}

.auth-form {
  padding: 0 2rem 2rem;
}

.auth-form .form-group {
  margin-bottom: 1.25rem;
}

.auth-form .btn {
  width: 100%;
  margin-top: 1rem;
  padding: 0.75rem 1.25rem;
}

.auth-footer {
  text-align: center;
  padding: 1.5rem;
  background-color: var(--light);
  border-top: 1px solid var(--card-border);
}

.auth-footer a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.auth-footer a:hover {
  text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .main-content.with-sidebar {
    margin-left: 0;
    width: 100%;
  }
  
  body.sidebar-open .sidebar {
    transform: translateX(0);
  }
}

@media (min-width: 992px) {
  .d-md-none {
    display: none !important;
  }
}