:root {
  --font-family-sans: 'Vazirmatn', 'IRANSansX', 'Tahoma', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --font-family-mono: 'Vazirmatn Code', 'SFMono-Regular', Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --current-font-size: var(--font-size-md);
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --border-radius-sm: 6px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  --border-radius-xl: 24px;
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

  --primary-color: #7c3aed;
  --primary-color-light: #a78bfa;
  --primary-color-dark: #5b21b6;
  --accent-color: #ec4899;
  --accent-color-light: #f9a8d4;
  --accent-color-dark: #c026d3;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #3b82f6;
  --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  --gradient-secondary: linear-gradient(135deg, var(--primary-color-light), var(--accent-color-light));

  --text-color: #1f2937;
  --text-color-muted: #6b7280;
  --text-color-inverse: #ffffff;
  --bg-color: #f9fafb;
  --bg-color-alt: #f3f4f6;
  --bg-color-secondary: #e5e7eb;
  --border-color: #e5e7eb;
  --border-color-strong: #d1d5db;
  --sidebar-bg: #ffffff;
  --modal-bg: #ffffff;
  --input-bg: #ffffff;
  --input-border: #d1d5db;
  --button-text-color: #ffffff;
  --shadow-light: rgba(0, 0, 0, 0.04);
  --shadow-normal: rgba(0, 0, 0, 0.08);
  --shadow-strong: rgba(0, 0, 0, 0.12);
  --shadow-extra: rgba(0, 0, 0, 0.20);
  --shadow-colored: rgba(124, 58, 237, 0.15);

  --user-message-bg: var(--primary-color);
  --user-message-text: #ffffff;
  --ai-message-bg: #f8fafc;
  --ai-message-text: #1f2937;
  --system-message-bg: #fef3c7;
  --system-message-text: #92400e;
  --tool-message-bg: #dbeafe;
  --tool-message-text: #1e40af;
  --code-bg: #1e1e2e;
  --code-text: #cdd6f4;
  --code-highlight: #313244;

  --scrollbar-width: 8px;
  --scrollbar-thumb-bg: var(--primary-color-light);
  --scrollbar-track-bg: var(--bg-color-alt);

  --header-height: 72px;
  --input-area-height: 120px;
  --modal-z-index: 1000;
  --loading-z-index: 9999;
  --overlay-z-index: 10000;
}

[data-theme="dark-theme"] {
  --primary-color: #8b5cf6;
  --primary-color-light: #a78bfa;
  --primary-color-dark: #6d28d9;
  --accent-color: #f472b6;
  --accent-color-light: #fb7185;
  --accent-color-dark: #db2777;
  --success-color: #34d399;
  --warning-color: #fbbf24;
  --danger-color: #f87171;
  --info-color: #60a5fa;
  
  --text-color: #e5e7eb;
  --text-color-muted: #9ca3af;
  --text-color-inverse: #1f2937;
  --bg-color: #0f172a;
  --bg-color-alt: #1e293b;
  --bg-color-secondary: #334155;
  --border-color: #334155;
  --border-color-strong: #475569;
  --sidebar-bg: #1e293b;
  --modal-bg: #1e293b;
  --input-bg: #334155;
  --input-border: #475569;
  --button-text-color: #e5e7eb;
  --shadow-light: rgba(0, 0, 0, 0.25);
  --shadow-normal: rgba(0, 0, 0, 0.35);
  --shadow-strong: rgba(0, 0, 0, 0.45);
  --shadow-extra: rgba(0, 0, 0, 0.65);
  --shadow-colored: rgba(139, 92, 246, 0.25);

  --user-message-bg: var(--primary-color);
  --user-message-text: #f1f5f9;
  --ai-message-bg: #334155;
  --ai-message-text: #e2e8f0;
  --system-message-bg: #422006;
  --system-message-text: #fef3c7;
  --tool-message-bg: #1e3a8a;
  --tool-message-text: #dbeafe;
  --code-bg: #11111b;
  --code-text: #cdd6f4;
  --code-highlight: #313244;
  
  --scrollbar-thumb-bg: var(--primary-color);
  --scrollbar-track-bg: #334155;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--current-font-size);
  background-color: var(--bg-color);
  color: var(--text-color);
  direction: rtl;
  text-align: right;
  height: 100vh;
  overflow: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
  font-variant-numeric: tabular-nums;
}

.fullscreen-body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  min-height: 100vh;
  overflow: hidden;
  position: relative;
}

.fullscreen-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  min-height: 100vh;
  width: 100%;
  overflow: hidden;
  position: relative;
}

.fullscreen-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-secondary);
  opacity: 0.03;
  pointer-events: none;
  z-index: 1;
  backdrop-filter: blur(120px);
  -webkit-backdrop-filter: blur(120px);
}

.fullscreen-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  position: relative;
  z-index: 2;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg) var(--spacing-xl);
  background: var(--sidebar-bg);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 20px var(--shadow-light);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  transition: all var(--transition-normal);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.app-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.app-icon {
  font-size: 3rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: iconPulse 3s ease-in-out infinite;
  filter: drop-shadow(0 0 10px var(--shadow-colored));
}

@keyframes iconPulse {
  0%, 100% { 
    transform: scale(1) rotate(0deg); 
    filter: drop-shadow(0 0 10px var(--shadow-colored));
  }
  50% { 
    transform: scale(1.08) rotate(2deg); 
    filter: drop-shadow(0 0 20px var(--shadow-colored));
  }
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.app-title {
  font-size: var(--font-size-3xl);
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
  margin: 0;
  position: relative;
}

.app-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-color-muted);
  font-weight: 600;
  opacity: 0.9;
}

.header-right {
  display: flex;
  align-items: center;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.header-btn {
  background: transparent;
  border: none;
  color: var(--text-color-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-md);
  border-radius: 50%;
  min-width: 48px;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.header-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--gradient-primary);
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition-fast);
}

.header-btn:hover,
.header-btn:focus-visible {
  color: var(--primary-color);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px var(--shadow-colored);
}

.header-btn:hover::before {
  opacity: 0.12;
  transform: scale(1);
}

.header-btn:active {
  transform: translateY(-1px) scale(1.02);
}

#fullscreenToggle {
  color: var(--accent-color);
}

.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  background: linear-gradient(180deg, var(--bg-color) 0%, var(--bg-color-alt) 100%);
}

.chat-messages-container {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-xl);
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb-bg) var(--scrollbar-track-bg);
  position: relative;
}

.chat-messages {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  max-width: 1400px;
  margin: 0 auto;
  padding-bottom: var(--spacing-2xl);
}

.message {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-lg);
  animation: messageSlideUp 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
}

@keyframes messageSlideUp {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.message .avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-color-alt);
  border: 3px solid var(--border-color);
  flex-shrink: 0;
  overflow: hidden;
  box-shadow: 0 8px 24px var(--shadow-light);
  transition: all var(--transition-normal);
  position: relative;
}

.message .avatar::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: -1;
}

.message .avatar:hover {
  transform: scale(1.08) rotate(5deg);
  box-shadow: 0 12px 32px var(--shadow-normal);
}

.message .avatar:hover::before {
  opacity: 1;
}

.message .avatar svg,
.message .avatar i {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--primary-color);
}

.message-bubble {
  flex: 1;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-xl);
  box-shadow: 0 8px 32px var(--shadow-light);
  position: relative;
  line-height: 1.8;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all var(--transition-normal);
  overflow: hidden;
  border: 1px solid transparent;
}

.message-bubble::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0.3;
}

.message-bubble:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px var(--shadow-normal);
  border-color: var(--border-color-strong);
}

.user-message {
  flex-direction: row-reverse;
  justify-content: flex-start;
}

.user-message .message-bubble {
  background: var(--gradient-primary);
  color: var(--user-message-text);
  border-bottom-left-radius: var(--border-radius-sm);
  box-shadow: 0 8px 32px var(--shadow-colored);
}

.ai-message {
  justify-content: flex-start;
}

.ai-message .message-bubble {
  background: var(--ai-message-bg);
  color: var(--ai-message-text);
  border: 1px solid var(--border-color);
  border-bottom-right-radius: var(--border-radius-sm);
}

.system-message {
  justify-content: center;
  max-width: 100%;
}

.system-message .message-bubble {
  background: var(--system-message-bg);
  color: var(--system-message-text);
  border: 2px dashed var(--warning-color);
  font-size: var(--font-size-sm);
  text-align: center;
  font-weight: 600;
}

.tool-message {
  justify-content: flex-start;
}

.tool-message .message-bubble {
  background: var(--tool-message-bg);
  color: var(--tool-message-text);
  border: 2px solid var(--info-color);
  border-bottom-right-radius: var(--border-radius-sm);
}

.message-bubble p {
  margin-bottom: var(--spacing-lg);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.message-bubble p:last-child {
  margin-bottom: 0;
}

.message-bubble strong,
.message-bubble b {
  font-weight: 800;
  color: inherit;
}

.message-bubble a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  position: relative;
}

.message-bubble a::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: width var(--transition-fast);
}

.message-bubble a:hover {
  color: var(--accent-color-dark);
}

.message-bubble a:hover::before {
  width: 100%;
}

.message-bubble ul,
.message-bubble ol {
  margin: var(--spacing-lg) 0;
  padding-right: var(--spacing-xl);
}

.message-bubble li {
  margin-bottom: var(--spacing-md);
  position: relative;
}

.message-bubble li::marker {
  color: var(--primary-color);
  font-weight: bold;
}

.message-bubble code:not(pre code) {
  background: var(--code-highlight);
  color: var(--code-text);
  padding: 0.3em 0.6em;
  border-radius: var(--border-radius-sm);
  font-family: var(--font-family-mono);
  font-size: 0.88em;
  font-weight: 600;
  border: 1px solid var(--border-color);
}

.message-bubble pre {
  background: var(--code-bg);
  color: var(--code-text);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
  font-family: var(--font-family-mono);
  font-size: 0.92em;
  line-height: 1.6;
  box-shadow: inset 0 4px 20px rgba(0, 0, 0, 0.2);
  position: relative;
  border: 1px solid var(--border-color-strong);
}

.message-bubble pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
  border: none;
}

.copy-code-btn {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
  border: none;
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-xs);
  font-weight: 600;
  cursor: pointer;
  opacity: 0;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.message-bubble pre:hover .copy-code-btn {
  opacity: 1;
}

.copy-code-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.view-html-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--gradient-primary);
  color: var(--button-text-color);
  border: none;
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  margin-top: var(--spacing-lg);
  transition: all var(--transition-fast);
  box-shadow: 0 4px 16px var(--shadow-colored);
}

.view-html-btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 24px var(--shadow-colored);
}

.view-html-btn:active {
  transform: translateY(-1px) scale(1.01);
}

.chat-thinking {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) auto;
  background: var(--bg-color-alt);
  border-radius: var(--border-radius-xl);
  box-shadow: 0 8px 32px var(--shadow-light);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  animation: thinkingPulse 2s ease-in-out infinite;
  border: 1px solid var(--border-color);
  max-width: 400px;
}

@keyframes thinkingPulse {
  0%, 100% { 
    transform: scale(1);
    box-shadow: 0 8px 32px var(--shadow-light);
  }
  50% { 
    transform: scale(1.02);
    box-shadow: 0 12px 40px var(--shadow-normal);
  }
}

.thinking-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.thinking-animation {
  display: flex;
  gap: var(--spacing-sm);
}

.thinking-dot {
  width: 10px;
  height: 10px;
  background: var(--gradient-primary);
  border-radius: 50%;
  animation: thinkingBounce 1.6s ease-in-out infinite both;
  box-shadow: 0 2px 8px var(--shadow-colored);
}

.thinking-dot:nth-child(1) { animation-delay: -0.4s; }
.thinking-dot:nth-child(2) { animation-delay: -0.2s; }
.thinking-dot:nth-child(3) { animation-delay: 0s; }

@keyframes thinkingBounce {
  0%, 80%, 100% { 
    transform: scale(0.8) translateY(0); 
    opacity: 0.6;
  }
  40% { 
    transform: scale(1.2) translateY(-8px); 
    opacity: 1;
  }
}

#thinkingMessage {
  font-size: var(--font-size-md);
  color: var(--text-color-muted);
  font-weight: 600;
}

.chat-input-section {
  padding: var(--spacing-xl);
  background: var(--sidebar-bg);
  border-top: 1px solid var(--border-color);
  box-shadow: 0 -8px 32px var(--shadow-light);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: sticky;
  bottom: 0;
  z-index: 50;
}

.tool-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-color-alt);
  border-radius: var(--border-radius-lg);
  border: 2px dashed var(--border-color);
  transition: all var(--transition-normal);
}

.tool-controls:hover {
  border-color: var(--primary-color-light);
  background: var(--bg-color);
}

.tool-specific-inputs {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-color-alt);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.input-wrapper {
  max-width: 1400px;
  margin: 0 auto;
}

.input-container {
  display: flex;
  align-items: flex-end;
  gap: var(--spacing-lg);
  background: var(--input-bg);
  border: 3px solid var(--border-color);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-md);
  box-shadow: 0 8px 32px var(--shadow-light);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.input-container::before {
  content: '';
  position: absolute;
  inset: -3px;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-xl);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: -1;
}

.input-container:focus-within {
  border-color: transparent;
  box-shadow: 0 12px 48px var(--shadow-colored);
  transform: translateY(-2px);
}

.input-container:focus-within::before {
  opacity: 1;
}

.chat-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-family-sans);
  font-size: var(--current-font-size);
  color: var(--text-color);
  line-height: 1.7;
  resize: none;
  min-height: 52px;
  max-height: 200px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb-bg) transparent;
  padding: var(--spacing-sm);
}

.chat-input::placeholder {
  color: var(--text-color-muted);
  opacity: 0.8;
  font-weight: 500;
}

.send-button {
  background: var(--gradient-primary);
  color: var(--button-text-color);
  border: none;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  box-shadow: 0 6px 20px var(--shadow-colored);
  position: relative;
  overflow: hidden;
}

.send-button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-color-dark));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.send-button::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle at center, transparent 60%, rgba(255,255,255,0.2) 100%);
  opacity: 0;
  transform: scale(0);
  transition: all var(--transition-fast);
}

.send-button:hover:not(:disabled) {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 12px 32px var(--shadow-colored);
}

.send-button:hover:not(:disabled)::before {
  opacity: 1;
}

.send-button:hover:not(:disabled)::after {
  opacity: 1;
  transform: scale(1);
}

.send-button:active:not(:disabled) {
  transform: translateY(-2px) scale(1.05);
}

.send-button:disabled {
  background: var(--text-color-muted);
  cursor: not-allowed;
  opacity: 0.4;
  transform: none;
  box-shadow: none;
}

.send-button i {
  position: relative;
  z-index: 1;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: var(--modal-z-index);
  padding: var(--spacing-xl);
  animation: modalFadeIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-backdrop[aria-hidden="false"] {
  display: flex;
}

@keyframes modalFadeIn {
  from { 
    opacity: 0;
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
  }
  to { 
    opacity: 1;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
}

.modal-wrapper {
  width: 100%;
  max-width: 1200px;
  max-height: 95vh;
  overflow: hidden;
  animation: modalSlideUp 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: translateY(60px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-dialog {
  background: var(--modal-bg);
  border-radius: var(--border-radius-xl);
  box-shadow: 0 32px 80px var(--shadow-extra);
  overflow: hidden;
  position: relative;
  border: 1px solid var(--border-color);
}

.modal-dialog::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--gradient-primary);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(135deg, var(--bg-color-alt), var(--bg-color));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.modal-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--text-color-muted);
  cursor: pointer;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.modal-close::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--danger-color);
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  color: white;
  transform: rotate(90deg) scale(1.1);
}

.modal-close:hover::before {
  opacity: 1;
  transform: scale(1);
}

.modal-body {
  padding: var(--spacing-xl);
  max-height: 75vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb-bg) var(--modal-bg);
}

.settings-container {
  display: grid;
  gap: var(--spacing-2xl);
}

.settings-section {
  background: var(--bg-color-alt);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.settings-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.settings-section:hover {
  box-shadow: 0 8px 32px var(--shadow-light);
  transform: translateY(-4px);
  border-color: var(--border-color-strong);
}

.settings-section:hover::before {
  opacity: 1;
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--text-color);
  margin-bottom: var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding-bottom: var(--spacing-lg);
  border-bottom: 3px solid var(--border-color);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient-primary);
}

.section-title i {
  color: var(--primary-color);
  font-size: 1.3em;
  padding: var(--spacing-sm);
  background: var(--bg-color);
  border-radius: 50%;
  border: 2px solid var(--primary-color-light);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-label {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-select,
.form-input {
  width: 100%;
  padding: var(--spacing-lg);
  border: 2px solid var(--input-border);
  border-radius: var(--border-radius-lg);
  background: var(--input-bg);
  color: var(--text-color);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-md);
  font-weight: 500;
  transition: all var(--transition-fast);
  min-height: 52px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%237c3aed'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: left 16px center;
  background-size: 24px;
  padding-left: 56px;
  cursor: pointer;
}

.form-select:focus,
.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 6px var(--primary-color-light);
  transform: translateY(-3px);
  background: var(--bg-color);
}

.toggle-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  background: var(--input-bg);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.toggle-label::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-secondary);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.toggle-label:hover {
  border-color: var(--primary-color-light);
  box-shadow: 0 4px 16px var(--shadow-light);
  transform: translateY(-2px);
}

.toggle-label:hover::before {
  opacity: 0.05;
}

.toggle-text {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-weight: 600;
  color: var(--text-color);
  position: relative;
  z-index: 1;
}

.toggle-icon {
  font-size: 1.2em;
  color: var(--primary-color);
  padding: var(--spacing-sm);
  background: var(--bg-color-alt);
  border-radius: 50%;
}

.toggle-switch {
  position: relative;
  width: 60px;
  height: 32px;
  background: var(--bg-color-secondary);
  border-radius: 32px;
  transition: all var(--transition-normal);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.15);
  z-index: 1;
}

.toggle-slider {
  position: absolute;
  top: 3px;
  right: 3px;
  width: 26px;
  height: 26px;
  background: white;
  border-radius: 50%;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.toggle-input {
  display: none;
}

.toggle-input:checked + .toggle-slider {
  transform: translateX(-28px);
  background: white;
}

.toggle-label:has(.toggle-input:checked) .toggle-switch {
  background: var(--success-color);
  box-shadow: inset 0 2px 8px rgba(16, 185, 129, 0.3);
}

.toggle-label:has(.toggle-input:checked) .toggle-slider {
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.4);
}

.sub-options {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-color);
  border-radius: var(--border-radius-md);
  border: 2px dashed var(--border-color);
  transition: all var(--transition-normal);
}

.sub-options:hover {
  border-color: var(--primary-color-light);
  background: var(--bg-color-alt);
}

.sub-form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-lg);
}

.sub-form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.avatar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.avatar-option {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  cursor: pointer;
  border: 4px solid var(--border-color);
  background: var(--bg-color-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  overflow: hidden;
  position: relative;
}

.avatar-option::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: -1;
}

.avatar-option::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle at center, transparent 50%, rgba(255,255,255,0.1) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.avatar-option:hover,
.avatar-option.selected {
  transform: scale(1.15) rotate(5deg);
  box-shadow: 0 12px 32px var(--shadow-strong);
}

.avatar-option:hover::after,
.avatar-option.selected::after {
  opacity: 1;
}

.avatar-option.selected::before {
  opacity: 1;
}

.avatar-option svg {
  width: 100%;
  height: 100%;
  transition: transform var(--transition-fast);
}

.avatar-option:hover svg {
  transform: scale(1.1);
}

.action-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg) var(--spacing-xl);
  border: none;
  border-radius: var(--border-radius-lg);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-md);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 52px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.action-button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.action-button::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255,255,255,0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: all var(--transition-fast);
}

.action-button:hover::before {
  opacity: 1;
}

.action-button:active::after {
  width: 300px;
  height: 300px;
}

.danger-button {
  background: linear-gradient(135deg, var(--danger-color), #dc2626);
  color: white;
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.3);
}

.danger-button:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 32px rgba(239, 68, 68, 0.4);
}

.secondary-button {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 16px var(--shadow-colored);
}

.secondary-button:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 32px var(--shadow-colored);
}

.help-content {
  line-height: 1.9;
  font-size: var(--font-size-md);
}

.help-section {
  margin-bottom: var(--spacing-2xl);
}

.help-intro {
  font-size: var(--font-size-lg);
  color: var(--text-color);
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--bg-color-alt), var(--bg-color));
  border-radius: var(--border-radius-lg);
  border-right: 6px solid var(--primary-color);
  position: relative;
  overflow: hidden;
}

.help-intro::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-secondary);
  opacity: 0.05;
}

.help-title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.help-list {
  list-style: none;
  padding: 0;
}

.help-list li {
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  background: var(--bg-color-alt);
  border-radius: var(--border-radius-md);
  border-right: 4px solid var(--accent-color);
  position: relative;
  transition: all var(--transition-fast);
}

.help-list li:hover {
  transform: translateX(-4px);
  box-shadow: 0 4px 16px var(--shadow-light);
}

.help-list li::before {
  content: '✓';
  position: absolute;
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  background: var(--success-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1rem;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.help-steps {
  counter-reset: step-counter;
  list-style: none;
  padding: 0;
}

.help-steps li {
  counter-increment: step-counter;
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  background: var(--bg-color-alt);
  border-radius: var(--border-radius-lg);
  position: relative;
  padding-right: 80px;
  transition: all var(--transition-fast);
  border: 1px solid var(--border-color);
}

.help-steps li:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--shadow-light);
}

.help-steps li::before {
  content: counter(step-counter);
  position: absolute;
  right: var(--spacing-lg);
  top: var(--spacing-lg);
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: var(--font-size-lg);
  box-shadow: 0 4px 16px var(--shadow-colored);
}

.help-footer {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl);
  background: var(--gradient-secondary);
  border-radius: var(--border-radius-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.help-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0.1;
}

.help-link {
  color: var(--primary-color-dark);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--font-size-lg);
  border-bottom: 3px solid transparent;
  transition: all var(--transition-fast);
  position: relative;
}

.help-link::before {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--primary-color-dark);
  transition: width var(--transition-fast);
}

.help-link:hover::before {
  width: 100%;
}

.help-thanks {
  font-size: var(--font-size-xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: var(--spacing-lg);
}

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--loading-z-index);
  animation: loadingFadeIn 0.4s ease-out;
}

@keyframes loadingFadeIn {
  from { 
    opacity: 0;
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
  }
  to { 
    opacity: 1;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }
}

.loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-2xl);
  text-align: center;
}

.loading-spinner {
  position: relative;
  width: 100px;
  height: 100px;
}

.spinner-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border: 5px solid transparent;
  border-radius: 50%;
}

.spinner-ring:nth-child(1) {
  border-top-color: var(--primary-color);
  animation: spinClockwise 2s linear infinite;
  animation-delay: 0s;
}

.spinner-ring:nth-child(2) {
  border-right-color: var(--accent-color);
  animation: spinCounterClockwise 2s linear infinite;
  animation-delay: 0.5s;
  width: 80%;
  height: 80%;
  top: 10%;
  left: 10%;
}

.spinner-ring:nth-child(3) {
  border-bottom-color: var(--success-color);
  animation: spinClockwise 2s linear infinite;
  animation-delay: 1s;
  width: 60%;
  height: 60%;
  top: 20%;
  left: 20%;
}

.spinner-ring:nth-child(4) {
  border-left-color: var(--warning-color);
  animation: spinCounterClockwise 2s linear infinite;
  animation-delay: 1.5s;
  width: 40%;
  height: 40%;
  top: 30%;
  left: 30%;
}

@keyframes spinClockwise {
  to { transform: rotate(360deg); }
}

@keyframes spinCounterClockwise {
  to { transform: rotate(-360deg); }
}

.loading-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: textPulse 2s ease-in-out infinite;
}

@keyframes textPulse {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

::-webkit-scrollbar {
  width: var(--scrollbar-width);
  height: var(--scrollbar-width);
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track-bg);
  border-radius: calc(var(--scrollbar-width) / 2);
}

::-webkit-scrollbar-thumb {
  background: var(--gradient-primary);
  border-radius: calc(var(--scrollbar-width) / 2);
  border: 2px solid var(--scrollbar-track-bg);
  transition: all var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color-dark);
  transform: scale(1.1);
}

::-webkit-scrollbar-corner {
  background: var(--scrollbar-track-bg);
}

.hidden {
  display: none !important;
}

.fade-in {
  animation: fadeInUp 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.slide-up {
  animation: slideUpSmooth 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUpSmooth {
  from {
    opacity: 0;
    transform: translateY(50px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.glass-effect {
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

[data-theme="dark-theme"] .glass-effect {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

@media (max-width: 1200px) {
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .settings-container {
    gap: var(--spacing-xl);
  }
  
  .modal-wrapper {
    max-width: 95vw;
  }
  
  .chat-messages {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  :root {
    --current-font-size: var(--font-size-sm);
  }
  
  .app-header {
    padding: var(--spacing-md) var(--spacing-lg);
    height: 64px;
  }
  
  .app-title {
    font-size: var(--font-size-xl);
  }
  
  .app-subtitle {
    display: none;
  }
  
  .header-btn {
    font-size: 1.3rem;
    min-width: 44px;
    min-height: 44px;
  }
  
  .chat-messages-container {
    padding: var(--spacing-lg);
  }
  
  .chat-messages {
    gap: var(--spacing-lg);
  }
  
  .message .avatar {
    width: 44px;
    height: 44px;
  }
  
  .message-bubble {
    padding: var(--spacing-lg);
  }
  
  .chat-input-section {
    padding: var(--spacing-lg);
  }
  
  .input-container {
    gap: var(--spacing-md);
  }
  
  .send-button {
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
  }
  
  .modal-backdrop {
    padding: var(--spacing-lg);
  }
  
  .modal-body {
    padding: var(--spacing-lg);
  }
  
  .settings-section {
    padding: var(--spacing-lg);
  }
  
  .avatar-grid {
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: var(--spacing-md);
  }
  
  .avatar-option {
    width: 60px;
    height: 60px;
  }
  
  .loading-spinner {
    width: 80px;
    height: 80px;
  }
}

@media (max-width: 480px) {
  .app-title {
    font-size: var(--font-size-lg);
  }
  
  .header-controls {
    gap: var(--spacing-xs);
  }
  
  .chat-input {
    font-size: var(--font-size-sm);
  }
  
  .form-row {
    gap: var(--spacing-lg);
  }
  
  .help-steps li {
    padding: var(--spacing-lg);
    padding-right: 60px;
  }
  
  .help-steps li::before {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-md);
  }
  
  .modal-title {
    font-size: var(--font-size-xl);
  }
  
  .section-title {
    font-size: var(--font-size-lg);
  }
}

@media (max-width: 360px) {
  .chat-messages-container {
    padding: var(--spacing-md);
  }
  
  .chat-input-section {
    padding: var(--spacing-md);
  }
  
  .message-bubble {
    padding: var(--spacing-md);
  }
  
  .avatar-grid {
    grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
  }
  
  .avatar-option {
    width: 50px;
    height: 50px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .app-icon,
  .thinking-dot,
  .spinner-ring,
  .loading-text {
    animation: none !important;
  }
}

@media (hover: none) and (pointer: coarse) {
  .header-btn:hover,
  .send-button:hover,
  .action-button:hover,
  .avatar-option:hover,
  .toggle-label:hover,
  .settings-section:hover {
    transform: none;
    box-shadow: initial;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary-color: #8b5cf6;
    --text-color: #e5e7eb;
    --bg-color: #0f172a;
  }
}

@supports (backdrop-filter: blur(20px)) or (-webkit-backdrop-filter: blur(20px)) {
  .app-header,
  .chat-input-section,
  .message-bubble,
  .modal-backdrop,
  .loading-overlay {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }
}

@supports not (backdrop-filter: blur(20px)) and not (-webkit-backdrop-filter: blur(20px)) {
  .app-header,
  .chat-input-section {
    background: rgba(255, 255, 255, 0.98);
  }
  
  [data-theme="dark-theme"] .app-header,
  [data-theme="dark-theme"] .chat-input-section {
    background: rgba(30, 41, 59, 0.98);
  }
}

@supports (display: grid) {
  .form-row,
  .sub-form-row,
  .avatar-grid {
    display: grid;
  }
}

@supports not (display: grid) {
  .form-row,
  .sub-form-row,
  .avatar-grid {
    display: flex;
    flex-wrap: wrap;
  }
}