:root {
  --primary-color: #6366f1; /* Premium Indigo */
  --primary-hover: #4f46e5;
  --secondary-color: #475569;
  --bg-gradient: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
  --sidebar-bg: rgba(255, 255, 255, 0.65);
  --card-bg: rgba(255, 255, 255, 0.75);
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: rgba(255, 255, 255, 0.8);
  
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --hold: #8b5cf6;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
  --shadow-lg: 0 10px 40px 0 rgba(31, 38, 135, 0.15);
  
  --glass-blur: blur(16px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-gradient: linear-gradient(135deg, #09090b 0%, #18181b 100%);
    --sidebar-bg: rgba(24, 24, 27, 0.65);
    --card-bg: rgba(39, 39, 42, 0.45);
    --text-main: #fafafa;
    --text-muted: #a1a1aa;
    --border-color: rgba(255, 255, 255, 0.08);
  }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(150, 150, 150, 0.3);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(150, 150, 150, 0.5);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-gradient);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

/* Glassmorphism Classes */
.glass {
  background: var(--card-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  border-radius: 16px;
  transition: all 0.3s ease;
}

/* Layout */
#sidebar {
  width: 260px;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  background: var(--sidebar-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  z-index: 100;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  padding: 0 24px 24px;
  color: var(--primary-color);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 0 16px;
}

.nav-links li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  text-decoration: none;
  color: var(--text-main);
  border-radius: 8px;
  font-weight: 500;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-links li a:hover, .nav-links li a.active {
  background: var(--primary-color);
  color: #fff;
  transform: translateX(4px);
}

#main-content {
  margin-left: 260px;
  padding: 32px;
  flex: 1;
}

/* Cards */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.kpi-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.kpi-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.kpi-title {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.kpi-value {
  font-size: 2rem;
  font-weight: 700;
}

/* Tables */
.table-container {
  overflow-x: auto;
  border-radius: 12px;
}

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

th, td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: rgba(0,0,0,0.02);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

tr:hover {
  background: rgba(0,0,0,0.02);
}

.dark tr:hover {
  background: rgba(255,255,255,0.02);
}

/* Badges */
.badge {
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.badge-warning { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.badge-danger { background: rgba(239, 68, 68, 0.1); color: var(--danger); }
.badge-hold { background: rgba(139, 92, 246, 0.1); color: var(--hold); }

/* Buttons & Inputs */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  font-size: 0.875rem;
  box-shadow: var(--shadow-sm);
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px -4px rgba(99, 102, 241, 0.4);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 0.875rem;
}

.form-control {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-main);
  transition: border-color 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
}

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

.animate-fade-in {
  animation: fadeIn 0.4s ease-out forwards;
}