:root {
  --bg-color: #121212;
  --bg-darker: #0a0a0a;
  --card-color: #1e1e1e;
  --text-color: #e0e0e0;
  --text-darker: #b0b0b0;
  --accent-color: #bb86fc;
  --secondary-color: #03dac6;
  --danger-color: #cf6679;
  --success-color: #69f0ae;
  --warning: #ff9800;
  --error: #f44336;
  --info: #2196f3;
  --online-color: #4caf50;
  --offline-color: #ff0000;
  --border-color: #333;
  --opposite-bg-color: #f5f5f5;
  --notification-bg-dark: rgba(19, 19, 19, 0.95);
  --accent-rgb: 187, 134, 252;
  --border-radius: 12px;
  --gap: 16px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.2);
  --transition: all 0.3s ease;
  --input-bg: var(--card-color);
}

[data-theme="light"] {
  --bg-color: #ffffff;
  --bg-darker: #f8f9fa;
  --card-color: #ffffff;
  --text-color: #1a1a1a;
  --text-darker: #424242;
  --accent-color: #1976d2;
  --secondary-color: #0288d1;
  --danger-color: #d32f2f;
  --success-color: #388e3c;
  --warning: #f57c00;
  --error: #d32f2f;
  --info: #1976d2;
  --online-color: #2e7d32;
  --offline-color: #ff0000;
  --border-color: #e0e0e0;
  --opposite-bg-color: #121212;
  --notification-bg-dark: rgba(255, 255, 255, 0.95);
  --accent-rgb: 25, 118, 210;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.05);
  --input-bg: #ffffff;
}

[data-theme] {
  transition: background-color 0.3s ease, color 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  scrollbar-width: thin;
  scrollbar-color: var(--opposite-bg-color) var(--bg-color);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: var(--opposite-bg-color);
  border-radius: 4px;
  border: 2px solid var(--bg-color);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

html {
  overflow-y: auto;
  height: 100%;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  margin: 0;
  transition: background-color 0.3s, color 0.3s;
}

.app-container {
  width: 100%;
  max-width: 950px;
  background: var(--card-color);
  border-radius: 2.5rem;
  box-shadow: var(--shadow);
  padding: 2rem 2rem 2.2rem;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 2rem;
  transition: background-color 0.3s, border 0.3s;
}

.auth-panel {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.8rem;
  letter-spacing: -0.5px;
  color: var(--text-color);
}

.logo i {
  color: var(--accent-color);
  font-size: 2rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-darker);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

input, select {
  width: 100%;
  padding: 12px 16px;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-color);
  font-size: 14px;
  transition: var(--transition);
  outline: none;
}

input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.15);
}

/* Buttons */
.btn {
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn i {
  font-size: 0.9rem;
}

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

.btn-primary:hover {
  filter: brightness(1.1);
}

.btn-secondary {
  background-color: rgba(128, 128, 128, 0.15);
  color: var(--text-color);
}

.btn-secondary:hover {
  background-color: rgba(128, 128, 128, 0.25);
}

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

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

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

/* Icon button */
.icon-btn {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 18px;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: all 0.2s;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  background-color: rgba(128, 128, 128, 0.2);
  transform: scale(1.1);
}

[data-theme="light"] .icon-btn:hover {
  background-color: rgba(0, 0, 0, 0.08);
}

.dashboard {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.user-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  background: var(--bg-darker);
  padding: 0.8rem 1.5rem;
  border-radius: 3rem;
  border: 1px solid var(--border-color);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
}

.badge {
  background: var(--accent-color);
  color: var(--bg-color);
  border-radius: 2rem;
  padding: 0.2rem 0.9rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
}

.badge.admin {
  background: var(--secondary-color);
}

/* Dropdown */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  position: absolute;
  right: 0;
  background-color: var(--card-color);
  min-width: 200px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  border-radius: var(--border-radius);
  padding: 8px;
  margin-top: 8px;
  border: 1px solid var(--border-color);
  transform-origin: top right;
  transform: scale(0.9);
  opacity: 0;
  transition: transform 0.15s ease, opacity 0.15s ease;
  display: block !important;
  pointer-events: none;
}

.dropdown-content.show {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

.dropdown-header {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-darker);
  font-size: 0.85rem;
  margin-bottom: 4px;
}

.dropdown-content a {
  color: var(--text-color);
  padding: 8px 12px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s;
  white-space: nowrap;
  border-radius: 6px;
  margin: 2px 0;
}

.dropdown-content a i {
  opacity: 0.7;
  width: 18px;
  text-align: center;
}

.dropdown-content a:hover {
  background-color: rgba(128, 128, 128, 0.15);
}

.dropdown-content a:hover i {
  opacity: 1;
}

.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--gap);
}

.device-card {
  background: var(--card-color);
  border-radius: var(--border-radius);
  padding: 1.2rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  transition: var(--transition);
}

.device-card.current {
  border: 2px solid var(--accent-color);
  background: rgba(var(--accent-rgb), 0.08);
}

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

.device-name {
  font-weight: 650;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.online-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--offline-color);
  display: inline-block;
}

.online-dot.online {
  background: var(--online-color);
  box-shadow: 0 0 8px var(--online-color);
}

.toggle-switch {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-darker);
}

/* Checkbox */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  cursor: pointer;
  transition: color 0.2s ease;
}

.checkbox-label:hover {
  color: var(--accent-color);
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkbox-label .checkmark {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
  background: var(--accent-color);
  border-color: var(--accent-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
  content: '✓';
  color: white;
  font-size: 12px;
  font-weight: bold;
}

.notification-center {
  position: fixed;
  top: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  background: var(--notification-bg-dark);
  color: var(--text-color);
  padding: 1rem 1.4rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 500;
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  pointer-events: auto;
  animation: slideIn 0.25s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

.toast.success i { color: var(--success-color); }
.toast.error i { color: var(--error); }

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal.show {
  display: flex;
  opacity: 1;
}

.modal-content {
  background-color: var(--card-color);
  border-radius: var(--border-radius);
  padding: 24px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform: scale(0.95);
  opacity: 0;
}

.modal.show .modal-content {
  transform: scale(1);
  opacity: 1;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-color);
}

.modal-body {
  margin-bottom: 20px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 16px;
  cursor: pointer;
  padding: 2px 6px;
}

.hidden {
  display: none !important;
}

@media (max-width: 768px) {
  body {
    padding: 1rem;
  }
  
  .app-container {
    padding: 1.5rem;
  }
}