:root {
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --secondary-color: #1e293b;
  --background-color: #f8fafc;
  --surface-color: #ffffff;
  --text-color: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --success-color: #22c55e;
  --danger-color: #ef4444;
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --transition: all 0.3s ease;
  --border-radius: 12px;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.5;
}

a {
  text-decoration: none;
  color: inherit;
}

/* Auth Layout */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  padding: 1rem;
}

.auth-card {
  background: var(--surface-color);
  width: 100%;
  max-width: 400px;
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  animation: slideUp 0.5s ease-out;
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--secondary-color);
  margin-bottom: 0.5rem;
}

.auth-header p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--secondary-color);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: var(--transition);
  outline: none;
  font-family: var(--font-family);
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-family);
  width: 100%;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

/* Dashboard Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background: var(--surface-color);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.sidebar-brand {
  padding: 1.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  border-bottom: 1px solid var(--border-color);
}

.sidebar-nav {
  padding: 1rem;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  color: var(--text-muted);
  border-radius: 8px;
  margin-bottom: 0.5rem;
  transition: var(--transition);
  font-weight: 500;
}

.nav-item i {
  margin-right: 0.75rem;
  font-size: 1.25rem;
}

.nav-item:hover, .nav-item.active {
  background-color: var(--primary-color);
  color: white;
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.header {
  height: 70px;
  background: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
}

.header-user {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-weight: 500;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

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

.page-header {
  margin-bottom: 2rem;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--secondary-color);
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--surface-color);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-5px);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-right: 1rem;
}

.stat-icon.primary { background: rgba(99, 102, 241, 0.1); color: var(--primary-color); }
.stat-icon.success { background: rgba(34, 197, 94, 0.1); color: var(--success-color); }
.stat-icon.danger { background: rgba(239, 68, 68, 0.1); color: var(--danger-color); }

.stat-details h3 {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.stat-details p {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-color);
}

/* Table Card */
.card {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.table-responsive {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 1rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: #f8fafc;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td {
  font-size: 0.875rem;
}

tbody tr {
  transition: var(--transition);
}

tbody tr:hover {
  background-color: #f8fafc;
}

.badge {
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-success {
  background: rgba(34, 197, 94, 0.1);
  color: var(--success-color);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger-color);
}

/* Animations */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}