:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --purple-500: #8b5cf6;
  --purple-600: #7c3aed;
  --gray-50: #2a2a2e;
  --gray-100: #35353a;
  --gray-200: #4a4a52;
  --gray-300: #5e5e68;
  --gray-600: #9b9ba5;
  --gray-700: #d0d0d8;
  --gray-800: #e5e5eb;
  --gray-900: #f0f0f5;
  --bg-primary: #1e1e22;
  --bg-secondary: #252529;
  --bg-card: #2d2d32;
  --text-primary: #e8e8ee;
  --text-secondary: #b0b0ba;
  --border-color: #3e3e46;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  background: var(--bg-secondary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  margin-bottom: 2rem;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary);
  text-decoration: none;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav {
  display: flex;
  gap: 1rem;
  list-style: none;
}

.nav a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 0.25rem;
  transition: all 0.2s;
}

.nav a:hover {
  background: var(--gray-100);
  color: var(--text-primary);
}

.btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  display: inline-block;
  transition: all 0.2s;
}

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

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

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

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

.btn-sm {
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
}

/* Cards */
.card {
  background: var(--bg-card);
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

/* Login */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px rgba(0,0,0,0.3);
  border: 1px solid var(--border-color);
  width: 100%;
  max-width: 400px;
}

.login-title {
  font-size: 1.5rem;
  font-weight: bold;
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

/* Forms */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--gray-700);
}

.form-input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  font-size: 1rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.form-checkbox {
  margin-right: 0.5rem;
}

.error {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.3);
  padding: 0.75rem;
  border-radius: 0.375rem;
  margin-bottom: 1rem;
}

.success {
  background: rgba(16, 185, 129, 0.15);
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 0.75rem;
  border-radius: 0.375rem;
  margin-bottom: 1rem;
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th {
  background: var(--bg-secondary);
  padding: 0.75rem;
  text-align: left;
  font-weight: 600;
  color: var(--gray-700);
  border-bottom: 1px solid var(--border-color);
}

.table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.table tr:hover {
  background: var(--gray-100);
}

/* Grid */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Device card */
.device-card {
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: 0.5rem;
  background: var(--bg-card);
}

.device-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.device-name {
  font-weight: 600;
  font-size: 1.125rem;
}

.device-status {
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.device-status.open {
  background: var(--success);
  color: white;
}

.device-status.closed {
  background: var(--gray-600);
  color: white;
}

.device-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
  border: 1px solid var(--border-color);
}

.stat-value {
  font-size: 2rem;
  font-weight: bold;
  color: var(--primary);
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* Code display */
.code-block {
  background: var(--gray-50);
  color: #10b981;
  padding: 1rem;
  border-radius: 0.375rem;
  font-family: 'Courier New', monospace;
  font-size: 0.875rem;
  overflow-x: auto;
  margin: 1rem 0;
  border: 1px solid var(--border-color);
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success {
  background: var(--success);
  color: white;
}

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

.badge-gray {
  background: var(--gray-200);
  color: var(--text-primary);
}

/* Dropdown menus */
.admin-menu, .customer-menu {
  position: relative;
  display: inline-block;
}

.admin-menu-trigger, .customer-menu-trigger {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s;
}

.admin-menu-trigger:hover, .customer-menu-trigger:hover {
  background: var(--gray-200);
}

.admin-menu-dropdown, .customer-menu-dropdown {
  display: none;
  position: absolute;
  right: 0;
  top: 100%;
  margin-top: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  min-width: 180px;
  z-index: 1000;
}

.admin-menu-dropdown a, .customer-menu-dropdown a {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  text-decoration: none;
  transition: background 0.2s;
  border-bottom: 1px solid var(--border-color);
}

.admin-menu-dropdown a:last-child, .customer-menu-dropdown a:last-child {
  border-bottom: none;
}

.admin-menu-dropdown a:hover, .customer-menu-dropdown a:hover {
  background: var(--gray-100);
}

.admin-menu.active .admin-menu-dropdown, .customer-menu.active .customer-menu-dropdown {
  display: block;
}

/* Utility */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.text-center { text-align: center; }
.text-sm { font-size: 0.875rem; }