:root {
  --primary-color: #4f46e5;
  --primary-light: #818cf8;
  --primary-dark: #3730a3;
  --secondary-color: #10b981;
  --secondary-light: #34d399;
  --secondary-dark: #059669;
  --danger-color: #ef4444;
  --danger-light: #f87171;
  --danger-dark: #dc2626;
  --warning-color: #f59e0b;
  --success-color: #10b981;
  --info-color: #3b82f6;
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
  --text-tertiary: #9ca3af;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  --transition-fast: 150ms;
  --transition-normal: 300ms;
  --transition-slow: 500ms;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.theme-dark {
  --primary-color: #818cf8;
  --primary-light: #a5b4fc;
  --primary-dark: #4f46e5;
  --secondary-color: #34d399;
  --secondary-light: #6ee7b7;
  --secondary-dark: #10b981;
  --text-primary: #f9fafb;
  --text-secondary: #e5e7eb;
  --text-tertiary: #9ca3af;
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --bg-tertiary: #374151;
  --border-color: #374151;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-sans);
}

body {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-light);
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-size: inherit;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  gap: 0.5rem;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--border-color);
  transform: translateY(-1px);
}

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

.btn-danger:hover {
  background-color: var(--danger-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-success:hover {
  background-color: var(--secondary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-sm {
  padding: 0.25rem 0.75rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1.125rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

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

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  border-color: var(--primary-light);
  outline: 0;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.75rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
}

.form-check {
  display: flex;
  align-items: center;
  margin-bottom: 0.5rem;
}

.form-check-input {
  width: 1rem;
  height: 1rem;
  margin-right: 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.form-check-input:checked {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.card {
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  height: auto;
  width: auto;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

.card-body {
  padding: 1.5rem;
}

.card-footer {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

.app-header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-normal);
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary-color);
  transition: color var(--transition-fast);
}

.logo:hover {
  color: var(--primary-light);
}

.avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  background-color: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  transition: background-color var(--transition-fast);
}

.dropdown-menu {
  background-color: var(--bg-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  min-width: 10rem;
  z-index: 1000;
  animation: fadeInDown var(--transition-fast) forwards;
}

.dropdown-item {
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--bg-tertiary);
  color: var(--primary-color);
}

.flash-messages {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 24rem;
}

.flash-message {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  animation: slideInRight var(--transition-normal) forwards;
  background-color: var(--bg-primary);
  border-left: 4px solid var(--primary-color);
}

.flash-message.success {
  border-left-color: var(--success-color);
}

.flash-message.error {
  border-left-color: var(--danger-color);
}

.flash-message.warning {
  border-left-color: var(--warning-color);
}

.flash-message.info {
  border-left-color: var(--info-color);
}

.message-text {
  color: var(--text-primary);
  font-weight: 500;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-tertiary);
  font-size: 1.25rem;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.close-btn:hover {
  color: var(--text-primary);
}

.fade-out {
  animation: fadeOut var(--transition-normal) forwards;
}

.settings-sidebar {
  background-color: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  transition: background-color var(--transition-normal);
}

.settings-nav-item {
  display: flex;
  align-items: center;
  padding: 0.875rem 1.5rem;
  color: var(--text-secondary);
  border-left: 3px solid transparent;
  transition: all var(--transition-fast);
  gap: 0.75rem;
}

.settings-nav-item:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.settings-nav-item.active {
  background-color: rgba(79, 70, 229, 0.1);
  color: var(--primary-color);
  border-left-color: var(--primary-color);
  font-weight: 500;
}

.settings-section {
  animation: fadeIn var(--transition-normal) forwards;
}

.settings-header h1 {
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.settings-header p {
  color: var(--text-secondary);
}

.settings-card {
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.settings-card:hover {
  box-shadow: var(--shadow-md);
}

.settings-card-header {
  padding: 1.25rem 1.5rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.settings-card-header h2 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.settings-card-content {
  padding: 1.5rem;
}

.theme-options {
  display: flex;
  gap: 1.5rem;
  margin-top: 1rem;
}

.theme-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
}

.theme-preview {
  width: 5rem;
  height: 3rem;
  border-radius: var(--radius-md);
  margin-bottom: 0.5rem;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.theme-option input:checked + .theme-preview {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
  transform: scale(1.05);
}

.light-theme {
  background-color: #ffffff;
  position: relative;
}

.light-theme::after {
  content: '';
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  right: 0.5rem;
  height: 0.5rem;
  background-color: #f3f4f6;
  border-radius: var(--radius-sm);
}

.dark-theme {
  background-color: #111827;
  position: relative;
}

.dark-theme::after {
  content: '';
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  right: 0.5rem;
  height: 0.5rem;
  background-color: #374151;
  border-radius: var(--radius-sm);
}

.system-theme {
  background: linear-gradient(to right, #ffffff 50%, #111827 50%);
  position: relative;
}

.system-theme::after {
  content: '';
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  width: 1rem;
  height: 0.5rem;
  background-color: #f3f4f6;
  border-radius: var(--radius-sm);
}

.system-theme::before {
  content: '';
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 1rem;
  height: 0.5rem;
  background-color: #374151;
  border-radius: var(--radius-sm);
}

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

.api-key-display {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 1rem 0;
  position: relative;
}

.api-key-display input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: monospace;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

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

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

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

@keyframes slideInUp {
  from {
    transform: translateY(1rem);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes fadeInDown {
  from {
    transform: translateY(-0.5rem);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 768px) {
  .settings-sidebar {
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  
  .settings-nav {
    display: flex;
    overflow-x: auto;
    padding: 0.5rem 0;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
  }
  
  .settings-nav::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
  }
  
  .settings-nav-item {
    white-space: nowrap;
    border-left: none;
    border-bottom: 3px solid transparent;
    padding: 0.75rem 1rem;
  }
  
  .settings-nav-item.active {
    border-left-color: transparent;
    border-bottom-color: var(--primary-color);
  }
  
  .theme-options {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .flash-messages {
    left: 1rem;
    right: 1rem;
  }
}

@media (hover: none) {
  .btn:hover {
    transform: none;
  }
  
  .card:hover {
    transform: none;
  }
  
  .settings-card:hover {
    box-shadow: var(--shadow-sm);
  }
}

@media (prefers-color-scheme: dark) {
  .theme-system {
    --primary-color: #818cf8;
    --primary-light: #a5b4fc;
    --primary-dark: #4f46e5;
    --secondary-color: #34d399;
    --secondary-light: #6ee7b7;
    --secondary-dark: #10b981;
    --text-primary: #f9fafb;
    --text-secondary: #e5e7eb;
    --text-tertiary: #9ca3af;
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --border-color: #374151;
  }
}

.settings-content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

.settings-sidebar {
  width: 240px;
  min-width: 240px;
  background-color: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.settings-nav {
  display: flex;
  flex-direction: column;
  padding: 1rem 0;
}

.settings-footer {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
}

.back-to-dashboard {
  display: flex;
  align-items: center;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.back-to-dashboard:hover {
  background-color: var(--bg-tertiary);
  color: var(--primary-color);
}

.back-to-dashboard i {
  margin-right: 0.5rem;
}

.settings-section {
  display: none;
  animation: fadeIn var(--transition-normal) forwards;
}

.settings-section.active {
  display: block;
}

.settings-header {
  margin-bottom: 1.5rem;
}

.settings-header h1 {
  display: flex;
  align-items: center;
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.settings-header h1 i {
  margin-right: 0.75rem;
  color: var(--primary-color);
}

.settings-header p {
  color: var(--text-secondary);
}

.settings-form {
  max-width: 600px;
}

.avatar-settings {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.avatar-preview {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 600;
  color: white;
}

.avatar-colors {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0;
}

.color-option {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.color-option:hover, .color-option.active {
  transform: scale(1.1);
  border-color: white;
  box-shadow: 0 0 0 2px var(--primary-color);
}

.upload-btn-wrapper {
  position: relative;
  overflow: hidden;
  display: inline-block;
}

.upload-btn-wrapper input[type=file] {
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.account-info {
  margin-bottom: 1.5rem;
}

.info-item {
  display: flex;
  align-items: center;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
}

.info-item i {
  width: 24px;
  margin-right: 0.75rem;
  color: var(--primary-color);
}

.api-docs-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

@media (max-width: 768px) {
  .main-content {
    flex-direction: column;
  }
  
  .settings-sidebar {
    width: 100%;
    min-width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  
  .settings-nav {
    flex-direction: row;
    overflow-x: auto;
    padding: 0.5rem;
  }
  
  .settings-nav-item {
    white-space: nowrap;
    padding: 0.75rem 1rem;
  }
  
  .settings-content {
    padding: 1rem;
  }
  
  .avatar-settings {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .settings-footer {
    display: none;
  }
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--bg-secondary);
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.theme-light {
  --primary-color: #4f46e5;
  --primary-light: #818cf8;
  --primary-dark: #3730a3;
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
  --text-tertiary: #9ca3af;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --border-color: #e5e7eb;
}

.theme-dark {
  --primary-color: #818cf8;
  --primary-light: #a5b4fc;
  --primary-dark: #4f46e5;
  --text-primary: #f9fafb;
  --text-secondary: #e5e7eb;
  --text-tertiary: #9ca3af;
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --bg-tertiary: #374151;
  --border-color: #374151;
}