:root {
  --bg-color: #0f172a;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --card-bg: rgba(30, 41, 59, 0.7);
  --border-color: rgba(255, 255, 255, 0.1);
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --success: #10b981;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  background: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

/* Glass Card */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.login-card {
  width: 100%;
  max-width: 400px;
}

.card h2 {
  margin-bottom: 1.5rem;
  font-weight: 600;
  text-align: center;
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.5);
  color: var(--text-main);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-weight: 500;
  text-align: center;
  transition: all 0.2s;
  text-decoration: none;
  font-size: 0.875rem;
}

.btn-primary {
  background: var(--primary);
  color: white;
  width: 100%;
}

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

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

.btn-danger:hover {
  background: var(--danger-hover);
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.75rem;
}

.btn-inline {
  width: auto;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.25rem;
}

.navbar-user {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-link:hover {
  color: var(--text-main);
}

/* Tables */
.table-container {
  overflow-x: auto;
  margin-top: 1.5rem;
}
table {
  width: 100%;
  border-collapse: collapse;
}

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

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

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

/* Grid Layouts */
.admin-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .admin-grid {
    grid-template-columns: 1fr;
  }
}

.alert {
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}
.alert-error {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid var(--danger);
  color: #fca5a5;
}
.alert-success {
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid var(--success);
  color: #6ee7b7;
}

/* Badges */
.badge {
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
}
.badge-admin {
  background: rgba(59, 130, 246, 0.2);
  color: #93c5fd;
}
.badge-user {
  background: rgba(16, 185, 129, 0.2);
  color: #6ee7b7;
}