src/index.css

@tailwind base;
@tailwind components;
@tailwind utilities;

/* Base styles */
:root {
  --primary-color: #3e6ae1;
  --primary-hover: #2952c8;
  --text-color: #1a1a1a;
  --light-text: #4d4d4d;
  --lightest-text: #737373;
  --border-color: #e5e7eb;
  --background-color: #ffffff;
  --sidebar-width: 280px;
  --header-height: 60px;
  --reasoning-background: #f9fafb;
  --user-message-bg: #f9f8f6;
  --user-message-color: var(--text-color);
  --assistant-message-bg: #f9f9f9;
  --assistant-message-color: #1a1a1a;
  --hover-color: #f5f5f5;
  --active-color: #e6f2ff;

  /* Responsive sidebar width */
  --mobile-sidebar-width: 100%;
  --tablet-sidebar-width: 250px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-color);
  line-height: 1.5;
  background-color: var(--background-color);
}

@layer components {
  /* App container */
  .app-container {
    @apply flex flex-col h-screen w-full overflow-hidden;
  }

  /* Header styles */
  .app-header {
    @apply flex justify-between items-center px-5 h-header border-b border-border bg-background;
  }

  .left-section {
    @apply flex items-center;
  }

  .right-section {
    @apply flex items-center gap-2.5;
  }

  .app-title {
    @apply text-xl font-semibold text-text;
  }
}

@layer components {
  /* Profile dropdown */
  .profile-dropdown-container {
    @apply relative;
  }

  .profile-dropdown-button {
    @apply py-1.5 px-3 bg-background border border-border rounded text-sm text-text cursor-pointer flex items-center gap-1.5;
  }

  .profile-dropdown-menu {
    @apply absolute top-full right-0 w-[200px] bg-background border border-border rounded shadow-md z-10 mt-1.5;
  }

  .profile-option {
    @apply p-3 cursor-pointer transition-colors duration-200 text-sm;
  }

  .profile-option:hover {
    @apply bg-hover;
  }

  .profile-option.active {
    @apply bg-active font-medium;
  }
}

@layer components {
  .settings-button {
    @apply py-1.5 px-3 bg-background border border-border rounded text-sm text-text cursor-pointer;
  }

  .settings-button:hover {
    @apply bg-hover;
  }

  /* Main content area */
  .app-content {
    @apply flex flex-1 overflow-hidden;
  }
}

@layer components {
  /* Sidebar */
  .sidebar {
    @apply w-sidebar border-r border-border flex flex-col transition-[width] duration-300 ease-in-out bg-background;
  }

  .sidebar.collapsed {
    @apply w-[50px] overflow-hidden;
  }

  .sidebar.collapsed .chat-list,
  .sidebar.collapsed .sidebar-header h2 {
    @apply hidden;
  }

  .sidebar-header {
    @apply flex justify-between items-center py-3 px-4 border-b border-border;
  }

  .sidebar.collapsed .sidebar-header {
    @apply py-3 px-[5px] justify-center;
  }

  .sidebar-header h2 {
    @apply text-sm font-semibold text-light-text m-0;
  }

  .toggle-sidebar-button {
    @apply bg-transparent border-0 text-base text-lightest-text cursor-pointer flex items-center justify-center z-10 w-6 h-6;
  }

  .toggle-sidebar-button:hover {
    @apply text-text;
  }
}

@layer components {
  /* Chat list */
  .chat-list {
    @apply flex-1 overflow-y-auto p-2.5;
  }

  .new-chat {
    @apply w-full py-2 px-3 bg-primary text-white border-none rounded cursor-pointer text-sm mb-4 transition-colors duration-200 flex items-center justify-center;
  }

  .new-chat:hover {
    @apply bg-primary-hover;
  }

  .chat-item {
    @apply flex justify-between items-center py-2 px-2.5 rounded cursor-pointer mb-0.5 transition-colors duration-200 text-sm text-light-text;
  }

  .chat-item:hover {
    @apply bg-hover;
  }

  .chat-item.active {
    @apply bg-active text-primary;
  }

  .delete-btn {
    @apply opacity-0 bg-transparent border-none text-lightest-text cursor-pointer text-xs transition-all duration-200 py-0.5 px-[5px];
  }

  .chat-item:hover .delete-btn {
    @apply opacity-100;
  }

  .delete-btn:hover {
    @apply text-red-600;
  }

  .empty-state {
    @apply text-lightest-text text-center p-5 text-sm;
  }
}

@layer components {
  /* Main chat area */
  .main-content {
    @apply flex-1 flex flex-col overflow-hidden bg-background;
  }

  /* Welcome screen */
  .welcome-screen {
    @apply flex flex-col items-center justify-center h-full p-5 text-center;
  }

  .welcome-screen h2 {
    @apply text-2xl font-semibold mb-2.5 text-text;
  }

  .welcome-screen p {
    @apply text-light-text mb-5 text-sm;
  }

  .new-chat-button {
    @apply py-2.5 px-5 bg-primary text-white border-none rounded cursor-pointer text-sm transition-colors duration-200;
  }

  .new-chat-button:hover {
    @apply bg-primary-hover;
  }
}

@layer components {
  /* Chat window */
  .chat-window {
    @apply flex flex-col h-full overflow-hidden;
  }

  .chat-messages {
    @apply flex-1 overflow-y-auto p-5 flex flex-col gap-6;
  }
}

@layer components {
  /* Message styles */
  .message {
    @apply flex flex-col max-w-[800px] mx-auto w-full;
  }

  .message.user {
    @apply items-end;
  }

  .message.assistant {
    @apply items-start;
  }

  .reasoning-container {
    @apply w-full border border-border rounded-lg overflow-hidden mb-2.5 bg-reasoning-bg;
  }

  .reasoning-header {
    @apply flex justify-between items-center py-2 px-3 cursor-pointer text-[0.8125rem] text-light-text bg-[#f5f5f5] border-b border-border;
  }

  .toggle-icon {
    @apply text-[0.625rem];
  }

  .reasoning-content {
    @apply p-3 text-[0.8125rem] whitespace-pre-wrap overflow-x-auto text-light-text max-h-[300px] overflow-y-auto;
  }

  .message-content {
    @apply py-3 px-4 rounded-md text-[0.9375rem] leading-normal break-words max-w-[90%] relative;
  }

  .message.user .message-content {
    @apply bg-user-message-bg text-user-message-color rounded-[6px_6px_0_6px];
  }

  .message.assistant .message-content {
    @apply bg-assistant-message-bg text-assistant-message-color rounded-[6px_6px_6px_0];
  }
}

@layer components {
  .copy-button {
    @apply absolute right-2 bottom-2 bg-white/80 border border-border rounded py-1 px-2 text-xs cursor-pointer opacity-0 transition-opacity duration-200;
  }

  .message-content:hover .copy-button {
    @apply opacity-100;
  }

  .copy-button.copied {
    @apply bg-emerald-500 text-white border-emerald-600;
  }

  .message.user .copy-button {
    @apply bg-white/90 text-light-text;
  }

  .message.user .copy-button:hover {
    @apply bg-white text-text;
  }

  .message.assistant .copy-button {
    @apply bg-[rgba(249,249,249,0.9)] text-text;
  }

  .message.assistant .copy-button:hover {
    @apply bg-background;
  }

  /* Add styles for markdown content */
  .message-content p {
    @apply mb-4;
  }

  .message-content p:last-child {
    @apply mb-0;
  }

  .message-content pre {
    @apply bg-black/5 p-3 rounded overflow-x-auto my-4;
  }

  .message-content code {
    @apply bg-black/5 py-0.5 px-1 rounded font-mono;
  }

  .message-content pre code {
    @apply bg-transparent p-0;
  }

  .message-content ul,
  .message-content ol {
    @apply my-4 pl-8;
  }

  .message-content li {
    @apply my-2;
  }

  .message-content blockquote {
    @apply border-l-4 border-border my-4 pl-4 text-light-text;
  }

  .message-content img {
    @apply max-w-full h-auto my-4 rounded;
  }

  .message-content table {
    @apply border-collapse w-full my-4;
  }

  .message-content th,
  .message-content td {
    @apply border border-border p-2 text-left;
  }

  .message-content th {
    @apply bg-hover;
  }

  .message-time {
    @apply text-xs text-lightest-text mt-1;
  }
}

@layer components {
  /* Input area */
  .chat-input {
    @apply flex p-4 border-t border-border gap-2.5 bg-background;
  }

  .message-input {
    @apply flex-1 py-3 px-4 border border-border rounded-md text-[0.9375rem] resize-none min-h-[24px] max-h-[200px] text-text outline-none transition-colors duration-200;
  }

  .message-input:focus {
    @apply border-primary;
  }

  .send-button {
    @apply px-5 bg-primary text-white border-none rounded-md cursor-pointer text-[0.9375rem] transition-colors duration-200 flex items-center justify-center;
  }

  .send-button:hover:not(:disabled) {
    @apply bg-primary-hover;
  }

  .send-button:disabled {
    @apply bg-slate-400 cursor-not-allowed opacity-70;
  }

  /* Loading cursor */
  .loading-cursor {
    @apply inline-block w-0.5 h-[1.2em] bg-current ml-0.5 animate-blink align-text-bottom;
  }

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

@layer components {
  /* Settings modal */
  .settings-overlay {
    @apply fixed inset-0 bg-black/50 flex items-center justify-center z-[1000];
  }

  .settings-modal {
    @apply bg-background rounded-lg w-[600px] max-w-[90%] max-h-[90vh] overflow-y-auto relative p-6 shadow-md;
  }

  .settings-panel h2 {
    @apply text-xl font-semibold mb-5 text-text;
  }

  .close-settings-button {
    @apply absolute top-4 right-4 bg-transparent border-none text-xl cursor-pointer text-lightest-text w-6 h-6 flex items-center justify-center rounded;
  }

  .close-settings-button:hover {
    @apply bg-hover text-text;
  }

  /* Profile management in settings */
  .profiles-section {
    @apply mb-6 border-b border-border pb-5;
  }

  .profiles-header {
    @apply flex justify-between items-center mb-3;
  }

  .profiles-header h3 {
    @apply text-base font-semibold text-text;
  }

  .add-profile-button {
    @apply py-1 px-2 bg-transparent border border-border rounded text-sm text-text cursor-pointer transition-all duration-200;
  }

  .add-profile-button:hover {
    @apply bg-hover;
  }

  .profiles-list {
    @apply flex flex-wrap gap-2 mb-4;
  }

  .profile-item {
    @apply py-2 px-3 bg-background border border-border rounded text-sm cursor-pointer transition-all duration-200 flex items-center gap-2;
  }

  .profile-item:hover {
    @apply bg-hover;
  }

  .profile-item.active {
    @apply bg-active border-primary;
  }

  .delete-profile-button {
    @apply bg-transparent border-none text-lightest-text cursor-pointer text-base transition-colors duration-200 flex items-center justify-center w-5 h-5;
  }

  .delete-profile-button:hover {
    @apply text-red-600;
  }

  .current-profile-section h3 {
    @apply text-base font-semibold text-text mb-4;
  }

  .setting-item {
    @apply mb-4;
  }

  .setting-item label {
    @apply block mb-1.5 text-sm text-light-text;
  }

  .setting-item input {
    @apply w-full py-2 px-3 border border-border rounded text-sm transition-colors duration-200;
  }

  .setting-item input:focus {
    @apply outline-none border-primary;
  }

  .setting-hint {
    @apply mt-1;
  }

  .hint-toggle {
    @apply bg-transparent border-none text-primary cursor-pointer text-xs p-0 text-left;
  }

  .hint-content {
    @apply hidden mt-2 text-xs text-light-text bg-hover p-2 rounded;
  }

  .hint-content.expanded {
    @apply block;
  }

  .hint-content p {
    @apply mb-1.5;
  }

  .hint-content ul {
    @apply ml-5;
  }

  .hint-content li {
    @apply mb-1;
  }

  .settings-actions {
    @apply flex justify-end gap-2.5 mt-6;
  }

  .save-button {
    @apply py-2 px-4 bg-primary text-white border-none rounded cursor-pointer text-sm transition-colors duration-200;
  }

  .save-button:hover {
    @apply bg-primary-hover;
  }

  .cancel-button {
    @apply py-2 px-4 bg-transparent border border-border rounded cursor-pointer text-sm transition-all duration-200;
  }

  .cancel-button:hover {
    @apply bg-hover;
  }
}

@layer components {
  /* Error and notification styles */
  .error-message {
    @apply fixed bottom-5 left-1/2 -translate-x-1/2 bg-red-100 text-red-600 py-2.5 px-5 rounded text-sm shadow-md z-[1000];
  }

  .loading {
    @apply fixed bottom-5 left-1/2 -translate-x-1/2 bg-blue-50 text-blue-700 py-2.5 px-5 rounded text-sm shadow-md z-[1000];
  }
}

@layer utilities {
  /* Custom scrollbar */
  ::-webkit-scrollbar {
    @apply w-1.5 h-1.5;
  }

  ::-webkit-scrollbar-track {
    @apply bg-transparent;
  }

  ::-webkit-scrollbar-thumb {
    @apply bg-gray-300 rounded-sm;
  }

  ::-webkit-scrollbar-thumb:hover {
    @apply bg-gray-400;
  }
}

/* Responsive styles */
@media (max-width: 768px) {
  .app-header {
    padding: 0 1rem;
  }

  .app-title {
    font-size: 1rem;
  }

  .sidebar {
    position: fixed;
    z-index: 50;
    height: 100%;
    width: 100%;
    left: -100%;
    transition: all 0.3s ease-in-out;
  }

  .sidebar.mobile-open {
    left: 0;
  }

  /* 确保在移动设备上收起的侧边栏仍然可见 */
  .sidebar.collapsed {
    width: 50px;
    left: 0;
  }

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

  .settings-modal {
    width: 95%;
    max-height: 80vh;
  }

  .profiles-list {
    flex-direction: column;
    gap: 0.5rem;
  }

  .chat-input {
    padding: 0.75rem;
  }

  .message-input {
    font-size: 0.875rem;
  }

  .send-button {
    padding: 0 1rem;
  }
}

/* Small mobile devices */
@media (max-width: 480px) {
  .app-header {
    height: 50px;
  }

  .right-section {
    gap: 0.5rem;
  }

  .profile-dropdown-button,
  .settings-button {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
  }

  .chat-messages {
    padding: 0.75rem;
  }

  .message-content {
    padding: 0.75rem;
    font-size: 0.875rem;
  }

  .welcome-screen h2 {
    font-size: 1.25rem;
  }
}