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

:root {
  color-scheme: light;
  --color-bg: #f5f5f5;
  --color-surface-1: #ffffff;
  --color-surface-2: #f8f9fa;
  --color-surface-3: #e7f3ff;
  --color-overlay: rgba(255, 255, 255, 0.12);
  --color-text-primary: #1f2937;
  --color-text-secondary: #4b5563;
  --color-text-muted: #6b7280;
  --color-text-inverse: #0f172a;
  --color-text-on-accent: #f8fafc;
  --color-border-light: rgba(15, 23, 42, 0.08);
  --color-border-strong: rgba(15, 23, 42, 0.18);
  --color-shadow-soft: 0 2px 12px rgba(15, 23, 42, 0.08);
  --color-shadow-strong: 0 12px 30px rgba(37, 99, 235, 0.15);
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-soft: rgba(37, 99, 235, 0.08);
  --color-success-bg: #d4edda;
  --color-success-border: #28a745;
  --color-danger: #dc3545;
  --color-danger-hover: #c82333;
  --color-danger-soft: rgba(220, 53, 69, 0.14);
  --color-warning-bg: #f8d7da;
  --color-scrollbar: rgba(15, 23, 42, 0.2);
  --color-scrollbar-hover: rgba(15, 23, 42, 0.3);
  --color-disabled-bg: rgba(15, 23, 42, 0.12);
  --color-disabled-border: rgba(15, 23, 42, 0.22);
  --color-disabled-text: rgba(15, 23, 42, 0.55);
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body.light-mode {
  color-scheme: light;
}

body.dark-mode {
  color-scheme: dark;
  --color-bg: #0f172a;
  --color-surface-1: #111827;
  --color-surface-2: #1f2937;
  --color-surface-3: rgba(59, 130, 246, 0.28);
  --color-overlay: rgba(15, 23, 42, 0.55);
  --color-text-primary: #e5ecff;
  --color-text-secondary: #cbd8ff;
  --color-text-muted: rgba(207, 217, 255, 0.82);
  --color-text-inverse: #0f172a;
  --color-text-on-accent: #0f172a;
  --color-border-light: rgba(148, 163, 184, 0.32);
  --color-border-strong: rgba(148, 163, 184, 0.48);
  --color-shadow-soft: 0 20px 55px rgba(2, 6, 23, 0.55);
  --color-shadow-strong: 0 30px 70px rgba(37, 99, 235, 0.38);
  --color-accent: #7eb6ff;
  --color-accent-hover: #9cc9ff;
  --color-accent-soft: rgba(126, 182, 255, 0.18);
  --color-success-bg: rgba(34, 197, 94, 0.24);
  --color-success-border: #22c55e;
  --color-danger: #f97a7a;
  --color-danger-hover: #f15c5c;
  --color-danger-soft: rgba(249, 122, 122, 0.24);
  --color-warning-bg: rgba(249, 122, 122, 0.3);
  --color-scrollbar: rgba(176, 196, 222, 0.32);
  --color-scrollbar-hover: rgba(176, 196, 222, 0.52);
  --color-disabled-bg: rgba(148, 163, 184, 0.25);
  --color-disabled-border: rgba(148, 163, 184, 0.4);
  --color-disabled-text: rgba(226, 232, 240, 0.82);
  --gradient-primary: linear-gradient(135deg, #312e81 0%, #1d4ed8 100%);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background: var(--color-bg);
  color: var(--color-text-primary);
  transition: background 0.4s ease, color 0.4s ease;
}

/* Loading Screen */
.loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: var(--gradient-primary);
  color: var(--color-text-on-accent);
}

.loading-spinner {
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid white;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
  margin-bottom: 20px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Login Page */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--gradient-primary);
  padding: 20px;
}

.login-box {
  background: var(--color-surface-1);
  padding: 40px;
  border-radius: 12px;
  box-shadow: var(--color-shadow-soft);
  width: 100%;
  max-width: 450px;
}

.login-box h1 {
  font-size: 32px;
  margin-bottom: 10px;
  text-align: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-box h2 {
  font-size: 24px;
  margin-bottom: 10px;
  text-align: center;
  color: var(--color-text-primary);
}

.login-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: 30px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--color-text-primary);
}

.form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--color-border-light);
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.2s;
  background: var(--color-surface-1);
  color: var(--color-text-primary);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.error-message {
  background: var(--color-danger-soft);
  color: var(--color-danger);
  padding: 12px;
  border-radius: 6px;
  margin-bottom: 20px;
  border-left: 4px solid var(--color-danger);
}

.login-footer {
  margin-top: 20px;
  text-align: center;
}

.link-button {
  background: none;
  border: none;
  color: var(--color-accent);
  cursor: pointer;
  font-size: 14px;
  text-decoration: underline;
  padding: 5px;
}

.link-button:hover {
  color: var(--color-accent-hover);
}

.demo-credentials {
  margin-top: 30px;
  padding: 15px;
  background: var(--color-surface-2);
  border-radius: 6px;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.demo-credentials strong {
  color: var(--color-text-primary);
}

/* Layout */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background: var(--color-bg);
}

/* Top Navigation Bar */
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 60px;
  background: var(--color-surface-1);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: var(--color-shadow-soft);
}

.nav-left {
  display: flex;
  align-items: center;
}

.app-title {
  margin: 0;
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.nav-tabs {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-tab {
  padding: 10px 20px;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-tab:hover {
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.nav-tab.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 15px;
}

.btn-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 32px;
  border: 1px solid transparent;
  background: var(--color-surface-2);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--color-shadow-soft);
}

.btn-theme-toggle:hover {
  color: var(--color-accent);
  transform: translateY(-1px);
}

.btn-theme-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.username {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.username i {
  font-size: 1.1rem;
  color: var(--color-accent);
}

.username-text {
  color: inherit;
}

.btn-logout {
  padding: 8px 16px;
  background: var(--color-danger);
  color: var(--color-text-on-accent);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s;
}

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

/* Content Wrapper - Contains Sidebar and Main Content */
.content-wrapper {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 300px;
  background: var(--color-surface-2);
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-controls {
  padding: 15px;
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-surface-1);
}

.btn-new-conversation {
  width: 100%;
  padding: 12px;
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  border: none;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  margin-bottom: 15px;
  box-shadow: var(--color-shadow-soft);
}

.btn-new-conversation:hover {
  background: var(--color-accent-hover);
}

.model-selector {
  margin-top: 10px;
}

.model-selector label {
  display: block;
  margin-bottom: 5px;
  font-size: 13px;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.model-select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-border-light);
  border-radius: 4px;
  background: var(--color-surface-1);
  color: var(--color-text-primary);
  font-size: 14px;
}

/* Status Indicator */
.status-indicator {
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 13px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-light);
}

.status-indicator.connected {
  border-left: 3px solid var(--color-success-border);
  background: var(--color-success-bg);
}

.status-indicator.disconnected {
  border-left: 3px solid var(--color-danger);
  background: var(--color-warning-bg);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 6px;
}

.connected .status-dot {
  background: #28a745;
  box-shadow: 0 0 4px #28a745;
}

.disconnected .status-dot {
  background: #dc3545;
}

.status-text {
  display: flex;
  align-items: center;
  font-size: 13px;
  color: var(--color-text-primary);
}

.status-details {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* Conversation List */
.conversation-list {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
}

.conversation-list h3 {
  font-size: 14px;
  margin: 15px 0 10px 5px;
  color: var(--color-text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.conversations {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.conversation-item {
  background: var(--color-surface-1);
  padding: 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid var(--color-border-light);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.conversation-item:hover {
  background: var(--color-surface-2);
  border-color: var(--color-accent);
  box-shadow: var(--color-shadow-soft);
}

.conversation-item.active {
  background: var(--color-surface-3);
  border-color: var(--color-accent);
  box-shadow: var(--color-shadow-strong);
}

.conv-main {
  flex: 1;
  min-width: 0;
}

.conv-title {
  font-weight: 500;
  margin-bottom: 4px;
  color: var(--color-text-primary);
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conv-meta {
  font-size: 11px;
  color: var(--color-text-muted);
  display: flex;
  gap: 8px;
  margin-bottom: 4px;
}

.msg-count {
  color: var(--color-text-secondary);
}

.conv-date {
  color: var(--color-text-muted);
}

.last-message {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conv-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.2s;
}

.conversation-item:hover .conv-actions {
  opacity: 1;
}

.btn-icon {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
  padding: 4px;
  opacity: 0.7;
  transition: all 0.2s;
  color: var(--color-text-muted);
}

.btn-icon:hover {
  opacity: 1;
  transform: scale(1.1);
  color: var(--color-accent);
}

.edit-mode {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.edit-mode input {
  padding: 8px;
  border: 1px solid #dee2e6;
  border-radius: 4px;
  font-size: 14px;
}

.edit-mode button {
  padding: 6px 12px;
  border: none;
  border-radius: 4px;
  background: #007bff;
  color: white;
  cursor: pointer;
  font-size: 13px;
}

.edit-mode button:hover {
  background: #0056b3;
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-muted);
  font-size: 14px;
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: auto;
  background: var(--color-surface-1);
}

/* API Key Manager and other panels in main content */
.api-key-manager {
  width: 100%;
  height: 100%;
  background: var(--color-surface-1);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 20px;
}

.prompt-library-header,
.tool-library-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-surface-2);
}

.prompt-library-header h2,
.tool-library-header h2 {
  font-size: 20px;
}

.prompt-library-actions,
.tool-library-actions {
  padding: 15px 20px;
  border-bottom: 1px solid var(--color-border-light);
}

.prompt-form,
.create-prompt-form {
  padding: 20px;
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border-light);
}

.create-prompt-form h3 {
  margin-top: 0;
  margin-bottom: 15px;
  color: var(--color-text-primary);
}

.prompt-form input,
.prompt-form textarea,
.prompt-form select,
.create-prompt-form input,
.create-prompt-form textarea,
.create-prompt-form select {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
  border: 1px solid var(--color-border-light);
  border-radius: 4px;
  font-size: 14px;
  font-family: inherit;
  box-sizing: border-box;
  background-color: var(--color-surface-1);
  color: var(--color-text-primary);
}

.create-prompt-form select {
  cursor: pointer;
}

.create-prompt-form input::placeholder,
.create-prompt-form textarea::placeholder {
  color: var(--color-text-muted);
}

.create-prompt-form small {
  display: block;
  margin-top: -8px;
  margin-bottom: 10px;
  color: var(--color-text-secondary);
  font-size: 12px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-primary);
}

.prompts-list {
  flex: 1;
  overflow-y: auto;
  padding: 15px;
}

.prompt-item {
  background: var(--color-surface-2);
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 12px;
  border: 1px solid var(--color-border-light);
}

.prompt-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
}

.prompt-header h3 {
  font-size: 16px;
  flex: 1;
  color: var(--color-text-primary);
}

.favorite-icon {
  margin-right: 5px;
}

.prompt-actions {
  display: flex;
  gap: 4px;
}

.prompt-description {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
}

.prompt-content {
  background: var(--color-surface-1);
  padding: 12px;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
  border: 1px solid var(--color-border-light);
  color: var(--color-text-primary);
}

.prompt-tags {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
}

/* Chat Window */
.chat-window {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-window-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  background: var(--gradient-primary);
  color: var(--color-text-on-accent);
}

.empty-state-large {
  text-align: center;
  max-width: 800px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.empty-state-large h2 {
  font-size: 36px;
  margin-bottom: 0;
  color: #ffffff;
}

.empty-state-large p {
  font-size: 18px;
  opacity: 0.95;
  margin-bottom: 0;
  color: #f8fafc;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 40px;
  color: inherit;
}

.feature {
  background: rgba(255, 255, 255, 0.16);
  padding: 30px;
  border-radius: 12px;
  backdrop-filter: blur(10px);
  color: #ffffff;
}

.feature .icon {
  font-size: 48px;
  display: block;
  margin-bottom: 15px;
  color: currentColor;
}

.feature h3 {
  font-size: 20px;
  margin-bottom: 10px;
  color: currentColor;
}

.feature p {
  font-size: 14px;
  opacity: 0.98;
  color: rgba(248, 250, 252, 0.92);
}

.chat-header {
  padding: 20px;
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-surface-2);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-header h2 {
  font-size: 20px;
  color: var(--color-text-primary);
}

.chat-info {
  display: flex;
  gap: 15px;
  align-items: center;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.model-badge {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
}

.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  background: var(--color-surface-2);
}

.message {
  margin-bottom: 20px;
  max-width: 80%;
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message.user {
  margin-left: auto;
}

.message.assistant {
  margin-right: auto;
}

.message-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--color-text-secondary);
}

.role {
  font-weight: 600;
  color: var(--color-text-primary);
}

.message-content {
  background: var(--color-surface-1);
  padding: 15px;
  border-radius: 12px;
  box-shadow: var(--color-shadow-soft);
  line-height: 1.6;
  white-space: pre-wrap;
  color: var(--color-text-primary);
}

.message.user .message-content {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
}

.message-content.loading {
  font-style: italic;
  opacity: 0.7;
  color: var(--color-text-secondary);
}

.loading-dots::after {
  content: '...';
  animation: dots 1.5s infinite;
}

@keyframes dots {
  0%, 20% {
    content: '.';
  }
  40% {
    content: '..';
  }
  60%, 100% {
    content: '...';
  }
}

.message-footer {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.streaming-indicator {
  color: var(--color-accent);
  font-size: 11px;
  font-weight: 500;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.cursor-blink {
  color: var(--color-accent);
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}

@keyframes blink {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

.message.streaming .message-content {
  border-left: 3px solid var(--color-accent);
}

.input-container {
  padding: 20px;
  border-top: 1px solid var(--color-border-light);
  background: var(--color-surface-1);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.input-container textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--color-border-light);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  resize: vertical;
  min-height: 100px;
  max-height: 300px;
  background: var(--color-surface-1);
  color: var(--color-text-primary);
}

.input-container textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.input-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  align-items: center;
}

.btn,
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 8px;
  border: none;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  box-shadow: var(--color-shadow-soft);
}

.btn:hover,
.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn:active,
.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn:focus-visible,
.btn-primary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn:disabled,
.btn-primary:disabled,
.btn[disabled],
.btn-primary[disabled] {
  background: var(--color-disabled-bg);
  color: var(--color-disabled-text);
  cursor: not-allowed;
  box-shadow: none;
  border: 1px solid var(--color-disabled-border);
  transform: none;
}

.btn:disabled:hover,
.btn-primary:disabled:hover,
.btn[disabled]:hover,
.btn-primary[disabled]:hover {
  background: var(--color-disabled-bg);
  color: var(--color-disabled-text);
}

.input-container .btn {
  min-width: 120px;
}

.btn-cancel {
  background: var(--color-danger);
  color: var(--color-text-on-accent);
}

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

/* Image Upload Styles */
.image-preview-container {
  position: relative;
  margin-bottom: 10px;
  display: inline-block;
}

.image-preview {
  max-width: 200px;
  max-height: 200px;
  border-radius: 8px;
  border: 2px solid var(--color-border-light);
  object-fit: contain;
}

.btn-remove-image {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--color-danger);
  color: var(--color-text-on-accent);
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

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

.message-image {
  display: block;
  max-width: 400px;
  max-height: 400px;
  border-radius: 8px;
  margin-bottom: 12px;
  cursor: pointer;
  transition: transform 0.2s;
}

.message-image:hover {
  transform: scale(1.02);
}

.empty-state {
  text-align: center;
  padding: 20px;
  opacity: 0.6;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

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

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

/* API Key Manager Styles */
.api-key-manager {
  padding: 20px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 2px solid #ddd;
}

.modal-header h2 {
  margin: 0;
  color: #333;
}

.btn-close {
  background: none;
  border: none;
  font-size: 32px;
  cursor: pointer;
  color: #999;
  padding: 0;
  width: 32px;
  height: 32px;
  line-height: 1;
}

.btn-close:hover {
  color: #333;
}

.new-key-alert {
  background: #fff3cd;
  border: 2px solid #ffc107;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.new-key-alert h3 {
  margin-top: 0;
  color: #856404;
}

.key-display {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 15px 0;
  padding: 10px;
  background: white;
  border-radius: 4px;
}

.key-display code {
  flex: 1;
  font-size: 14px;
  word-break: break-all;
  background: #f8f9fa;
  padding: 8px;
  border-radius: 4px;
}

.create-key-section {
  margin-bottom: 30px;
}

.create-key-section h3 {
  margin-bottom: 15px;
}

.input-group {
  display: flex;
  gap: 10px;
}

.input-group input {
  flex: 1;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
}

.api-keys-list {
  margin-bottom: 30px;
}

.api-keys-list h3 {
  margin-bottom: 15px;
}

.api-keys-list table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.api-keys-list th {
  text-align: left;
  padding: 10px;
  background: #f8f9fa;
  border-bottom: 2px solid #ddd;
  font-weight: 600;
}

.api-keys-list td {
  padding: 10px;
  border-bottom: 1px solid #eee;
}

.api-keys-list td code {
  background: #f8f9fa;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 12px;
}

.status-badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
}

.status-badge.active {
  background: #d4edda;
  color: #155724;
}

.status-badge.inactive {
  background: #f8d7da;
  color: #721c24;
}

.api-keys-list td button {
  margin-right: 5px;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-danger {
  background: #dc3545;
  color: white;
}

.btn-danger:hover {
  background: #c82333;
}

.api-docs-section {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 2px solid #ddd;
}

.api-docs {
  margin-top: 20px;
  background: #f8f9fa;
  padding: 20px;
  border-radius: 8px;
}

.api-docs h3 {
  margin-top: 0;
}

.api-docs h4 {
  margin-top: 20px;
  margin-bottom: 10px;
  color: #495057;
}

.api-docs h5 {
  margin-top: 15px;
  margin-bottom: 8px;
  color: #3498db;
}

.api-docs pre {
  background: #2d2d2d;
  color: #f8f8f2;
  padding: 15px;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.5;
}

.api-docs code {
  font-family: 'Courier New', monospace;
}

.endpoint {
  margin-bottom: 20px;
  padding: 15px;
  background: white;
  border-radius: 6px;
  border-left: 4px solid #3498db;
}

.endpoint p {
  margin: 5px 0;
  color: #666;
}

.btn-secondary {
  background: #6c757d;
  color: white;
}

.btn-secondary:hover {
  background: #5a6268;
}

/* Waterfall Builder Styles */

.waterfall-builder,
.tool-instance-manager {
  padding: 20px;
  max-width: 1400px;
  margin: 0 auto;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding: 0 0 15px 0;
  border-bottom: 2px solid var(--color-border-light, #e0e0e0);
  gap: 20px;
  color: var(--color-text-secondary, #4b5563);
}

.header h2 {
  margin: 0;
  color: var(--color-text-primary, #1f2937);
  flex: 1;
}

body.dark-mode .header {
  color: #e0e0e0;
  border-bottom-color: rgba(226, 232, 240, 0.25);
}

body.dark-mode .header h2 {
  color: #f1f5f9;
}

/* Forms */
.create-form,
.builder-panel {
  background: var(--color-surface-1, #ffffff);
  border: 1px solid var(--color-border-light, #e0e0e0);
  border-radius: 12px;
  padding: 25px;
  margin-bottom: 30px;
  box-shadow: var(--color-shadow-soft, 0 2px 4px rgba(0,0,0,0.1));
}

.form-section {
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border-light, #e0e0e0);
}

.form-section:last-child {
  margin-bottom: 30px;
}

.form-section h4 {
  margin: 0 0 15px;
  color: var(--color-text-secondary, #4b5563);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--color-text-primary, #1f2937);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border-light, #ddd);
  border-radius: 4px;
  font-size: 14px;
  font-family: inherit;
  background: var(--color-surface-1, #ffffff);
  color: var(--color-text-primary, #1f2937);
}

.form-group textarea.code-editor {
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  background: var(--color-surface-2, #f8f9fa);
  color: var(--color-text-primary, #1f2937);
}

.form-group input[type="checkbox"] {
  margin-right: 8px;
  width: auto;
}

.help-text {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  color: var(--color-text-secondary, #666);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.checkbox-group {
  display: flex;
  gap: 20px;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  font-weight: normal;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-small,
.btn-danger {
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
}

.btn-primary:disabled {
  background: var(--color-disabled-bg);
  color: var(--color-disabled-text);
  border: 1px solid var(--color-disabled-border);
  cursor: not-allowed;
  box-shadow: none;
}

.btn-secondary {
  background: var(--color-secondary);
  color: var(--color-text-on-secondary);
}

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

.btn-small {
  padding: 6px 12px;
  font-size: 13px;
  background: var(--color-surface-2, #f0f0f0);
  color: var(--color-text-primary, #333);
}

.btn-small:hover {
  background: var(--color-surface-2-hover, #e0e0e0);
}

body.dark-mode .btn-small {
  background: rgba(126, 182, 255, 0.14);
  color: #e6edff;
  border: 1px solid rgba(176, 196, 222, 0.32);
}

body.dark-mode .btn-small:hover {
  background: rgba(126, 182, 255, 0.28);
  color: #f8fbff;
  border-color: rgba(176, 196, 222, 0.5);
}

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

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

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

/* Tool Cards */
.tool-grid,
.waterfall-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.tool-card,
.waterfall-card {
  background: var(--color-surface-1, #ffffff);
  border: 1px solid var(--color-border-light, #e0e0e0);
  border-radius: 10px;
  padding: 20px;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.tool-card.highlight {
  border-color: var(--color-accent, #2563eb);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
}

.tool-card:hover,
.waterfall-card:hover {
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.tool-header,
.waterfall-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 10px;
}

.tool-header h4,
.waterfall-header h4 {
  margin: 0;
  color: var(--color-text-primary, #1f2937);
  font-size: 18px;
}

.builder-header {
  justify-content: space-between;
  align-items: start;
  margin-bottom: 10px;
}

.builder-header h3,
.create-form h3,
.tool-instance-manager h3 {
  margin: 0 0 20px;
  color: var(--color-text-primary, #1f2937);
  font-size: 18px;
}

.tool-meta,
.waterfall-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  gap: 10px;
  flex-wrap: wrap;
}

.tool-short-name,
.waterfall-short-name,
.waterfall-steps {
  padding: 4px 10px;
  background: var(--color-accent-soft, rgba(37, 99, 235, 0.08));
  border-radius: 6px;
  font-size: 12px;
  color: var(--color-accent, #2563eb);
  font-weight: 600;
  letter-spacing: 0.2px;
}

.tool-type {
  order: 2;
  margin-left: auto;
  padding: 4px 10px;
  background: var(--color-accent-soft, rgba(37, 99, 235, 0.08));
  border-radius: 20px;
  font-size: 12px;
  color: var(--color-accent, #2563eb);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.tool-meta .tool-short-name {
  order: 1;
}

.tool-description,
.waterfall-description {
  margin: 10px 0;
  color: var(--color-text-secondary, #4b5563);
  font-size: 14px;
  line-height: 1.5;
}

.tool-tags,
.waterfall-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0;
}

.tag {
  padding: 3px 8px;
  background: var(--color-accent-soft, rgba(37, 99, 235, 0.08));
  border-radius: 12px;
  font-size: 11px;
  color: var(--color-accent, #2563eb);
}

.favorite-badge {
  color: var(--color-accent, #2563eb);
  font-size: 20px;
}

.inactive-badge {
  padding: 3px 8px;
  background: var(--color-danger-soft, rgba(248, 113, 113, 0.18));
  color: var(--color-danger, #dc3545);
  border-radius: 4px;
  font-size: 11px;
}

.waterfall-badges {
  display: flex;
  gap: 8px;
  align-items: center;
}

.tool-actions,
.waterfall-actions {
  display: flex;
  gap: 8px;
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid var(--color-border-light, #e0e0e0);
}

/* Steps Container */
.add-step-control {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 20px;
  padding: 15px;
  background: var(--color-surface-2, #f8f9fa);
  border-radius: 4px;
  border: 1px solid var(--color-border-light, #dee2e6);
}

body.dark-mode .add-step-control {
  background: rgba(126, 182, 255, 0.12);
  border-color: rgba(176, 196, 222, 0.35);
}

.add-step-control label {
  font-weight: 500;
  color: var(--color-text-primary, #333);
}

.add-step-control input.tool-search-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--color-border-light, #ddd);
  border-radius: 4px;
  font-size: 14px;
  background: var(--color-surface-1, #ffffff);
  color: var(--color-text-primary, #1f2937);
}

body.dark-mode .add-step-control input.tool-search-input {
  background: rgba(17, 34, 56, 0.9);
  border-color: rgba(176, 196, 222, 0.42);
  color: #e6edff;
}

.add-step-control select {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--color-border-light, #ddd);
  border-radius: 4px;
  font-size: 14px;
  background: var(--color-surface-1, #ffffff);
  color: var(--color-text-primary, #1f2937);
}

body.dark-mode .add-step-control select {
  background: rgba(17, 34, 56, 0.95);
  border-color: rgba(176, 196, 222, 0.45);
  color: #f6f9ff;
}

.tool-select-list option {
  background: var(--color-surface-1, #ffffff);
  color: var(--color-text-primary, #1f2937);
}

body.dark-mode .tool-select-list option {
  background: rgba(17, 34, 56, 0.97);
  color: #f6f9ff;
}

.steps-container {
  min-height: 100px;
  padding: 20px;
  background: var(--color-surface-2, #f8f9fa);
  border-radius: 8px;
  border: 2px dashed var(--color-border-light, #dee2e6);
  transition: background 0.2s;
}

.steps-container.dragging-over {
  background: var(--color-accent-soft, rgba(37, 99, 235, 0.08));
  border-color: var(--color-accent, #2563eb);
}

.empty-steps {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-secondary, #666);
}

.step-card {
  background: var(--color-surface-1, #ffffff);
  border: 1px solid var(--color-border-light, #dee2e6);
  border-radius: 6px;
  margin-bottom: 15px;
  transition: all 0.2s;
}

.step-card.dragging {
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
  transform: rotate(2deg);
}

.step-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 15px;
  background: var(--color-surface-2, #f8f9fa);
  border-bottom: 1px solid var(--color-border-light, #dee2e6);
  cursor: grab;
  border-radius: 6px 6px 0 0;
}

.step-header:active {
  cursor: grabbing;
}

.drag-handle {
  font-size: 18px;
  color: var(--color-text-muted, #6b7280);
  cursor: grab;
}

.step-number {
  font-weight: 600;
  color: var(--color-accent, #2563eb);
  flex: 1;
}

.btn-remove {
  background: none;
  border: none;
  font-size: 24px;
  line-height: 1;
  color: var(--color-danger, #dc3545);
  cursor: pointer;
  padding: 0 5px;
}

.btn-remove:hover {
  color: var(--color-danger-hover, #c82333);
}

.step-content {
  padding: 15px;
}

.step-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  margin-bottom: 10px;
  color: var(--color-text-primary, #1f2937);
}

.step-info strong {
  color: var(--color-text-primary, #333);
  font-size: 15px;
}

.step-type {
  padding: 3px 8px;
  background: var(--color-accent-soft, rgba(37, 99, 235, 0.08));
  color: var(--color-accent, #2563eb);
  border-radius: 4px;
  font-size: 12px;
}

.step-config {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
}

.step-config label {
  font-size: 13px;
  color: var(--color-text-secondary, #4b5563);
}

.step-config select {
  padding: 5px 10px;
  border: 1px solid var(--color-border-light, #ddd);
  border-radius: 4px;
  font-size: 13px;
  background: var(--color-surface-1, #ffffff);
  color: var(--color-text-primary, #1f2937);
}

.step-arrow {
  text-align: center;
  font-size: 24px;
  color: var(--color-accent, #2563eb);
  padding: 10px 0;
}

/* Test Section */
.test-section {
  margin-top: 30px;
  padding: 20px;
  background: var(--color-surface-2, #f8f9fa);
  border-radius: 8px;
  border: 1px solid var(--color-border-light, #dee2e6);
}

.test-section h4 {
  margin-top: 0;
  margin-bottom: 15px;
  color: var(--color-text-primary, #333);
}

.test-result {
  margin-top: 20px;
  padding: 15px;
  background: var(--color-surface-1, #ffffff);
  border: 1px solid var(--color-border-light, #dee2e6);
  border-radius: 6px;
}

.test-result h5 {
  margin-top: 0;
  margin-bottom: 10px;
  color: var(--color-text-primary, #1f2937);
}

.test-result pre {
  margin: 0;
  padding: 15px;
  background: var(--color-surface-2, #f8f9fa);
  border-radius: 4px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-text-primary, #1f2937);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-secondary, #4b5563);
  font-size: 16px;
}

/* Error Message */
.error-message {
  padding: 12px 20px;
  background: var(--color-danger-soft, rgba(248, 113, 113, 0.18));
  border-left: 4px solid var(--color-danger, #dc3545);
  border-radius: 4px;
  color: var(--color-danger, #dc3545);
  margin-bottom: 20px;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s;
}

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

.modal-content {
  background: white;
  border-radius: 8px;
  padding: 0;
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.3s;
}

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

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid #e0e0e0;
  background: #f8f9fa;
}

.modal-header h3 {
  margin: 0;
  font-size: 20px;
  color: #333;
}

.btn-close {
  background: none;
  border: none;
  font-size: 28px;
  color: #999;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 30px;
  line-height: 1;
  transition: color 0.2s;
}

.btn-close:hover {
  color: #333;
}

.modal-body {
  padding: 20px;
}

/* Responsive */
@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .tool-grid,
  .waterfall-grid {
    grid-template-columns: 1fr;
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
  }
  
  .modal-content {
    width: 95%;
    max-height: 90vh;
  }
}

/* Search Functionality Styles */

/* Tool Search in Waterfall Builder */
.tool-search-input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
  margin-bottom: 8px;
}

.tool-search-input:focus {
  outline: none;
  border-color: #007bff;
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.tool-select-list {
  width: 100%;
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
  background: white;
}

.tool-select-list option {
  padding: 10px;
  cursor: pointer;
}

.tool-select-list option:hover {
  background: #e7f3ff;
}

.add-step-control {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
  padding: 15px;
  background: #f8f9fa;
  border-radius: 4px;
}

/* Conversation Search */
.search-box {
  position: relative;
  margin-bottom: 15px;
  padding: 0 10px;
}

.conversation-search {
  width: 100%;
  padding: 10px 35px 10px 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
  background: white;
}

.conversation-search:focus {
  outline: none;
  border-color: #007bff;
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.clear-search {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 24px;
  color: #999;
  cursor: pointer;
  padding: 0;
  width: 24px;
  height: 24px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.clear-search:hover {
  color: #333;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .tool-search-input,
  .conversation-search {
    font-size: 16px; /* Prevent zoom on mobile */
  }
}

/* Generic Search Input Styling (Tools & Waterfalls) */
.search-container {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-input {
  width: 100%;
  padding: 10px 38px 10px 14px;
  border: 1px solid #d0d7de;
  border-radius: 8px;
  font-size: 14px;
  background: #f9fafb;
  color: #2c3e50;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.search-input::placeholder {
  color: #8a9ba8;
}

.search-input:focus {
  outline: none;
  border-color: #0d6efd;
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(13, 110, 253, 0.12);
}

.search-clear {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  font-size: 20px;
  color: #98a6b3;
  cursor: pointer;
  padding: 0;
  width: 24px;
  height: 24px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease, transform 0.2s ease;
}

.search-clear:hover {
  color: #495057;
  transform: scale(1.05);
}


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