:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --bg-dark: #0f172a;
  --bg-gradient-1: rgba(79, 70, 229, 0.15);
  --bg-gradient-2: rgba(34, 197, 94, 0.15);
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-hover: rgba(255, 255, 255, 0.08);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
}

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-dark);
  background-image: radial-gradient(circle at 15% 50%, var(--bg-gradient-1), transparent 35%),
                    radial-gradient(circle at 85% 30%, var(--bg-gradient-2), transparent 35%);
  color: var(--text-main);
  min-height: 100vh;
  background-attachment: fixed;
}

/* Glass panel */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 1rem;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.glass-panel-hover:hover {
  background: var(--glass-hover);
  transform: translateY(-2px);
  transition: all 0.3s ease;
}

/* Auth Layout */
.auth-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 2rem;
  box-sizing: border-box;
}

.auth-card {
  width: 100%;
  max-width: 450px;
  padding: 2.5rem;
  animation: slideUp 0.5s ease-out;
}

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

.sidebar {
  width: 250px;
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-right: 1px solid var(--glass-border);
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(20px);
}

.brand {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 2rem;
  background: linear-gradient(135deg, #4f46e5, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-link {
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  color: var(--text-main);
  text-decoration: none;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 500;
}

.nav-link:hover, .nav-link.active {
  background: var(--glass-hover);
  border-left: 3px solid var(--primary);
}

.main-content {
  flex: 1;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  overflow-y: auto;
  max-height: 100vh;
  box-sizing: border-box;
}

.header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

input, select, textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--glass-border);
  border-radius: 0.5rem;
  color: var(--text-main);
  font-size: 1rem;
  outline: none;
  transition: all 0.3s ease;
  box-sizing: border-box;
  font-family: inherit;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

.btn {
  padding: 0.75rem 1.5rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  width: 100%;
}

.btn:hover {
  background: var(--primary-hover);
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn-inline {
  width: auto;
}

.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #dc2626; box-shadow: 0 4px 15px rgba(220, 38, 38, 0.4); }

/* Tables */
.table-container {
  overflow-x: auto;
}
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--glass-border);
}
th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.9rem;
}

/* Utilities */
.text-center { text-align: center; }
.mt-2 { margin-top: 1rem; }
.mb-2 { margin-bottom: 1rem; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }

/* Grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 1.5rem;
}

.stat-card h3 {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}
.stat-card .value {
  margin: 0.5rem 0 0 0;
  font-size: 2rem;
  font-weight: 700;
}

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

/* Toasts */
#toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  padding: 1rem 1.5rem;
  border-radius: 0.5rem;
  color: white;
  animation: slideInRight 0.3s ease-out;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(5px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 500;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}
.modal-content {
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: all 0.3s;
}
.modal-overlay.active .modal-content {
  transform: translateY(0);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}
.close-modal {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}