/* ============ Global Reset & Base ============ */
:root {
  /* 背景色 */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f0f4f8;
  --bg-hover: rgba(37, 99, 235, 0.06);
  --bg-active: rgba(37, 99, 235, 0.12);
  --bg-input: #f8fafc;
  --bg-code: #f1f5f9;
  --bg-thinking: #f1f5f9;

  /* 文字颜色 */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;

  /* 边框颜色 */
  --border-light: rgba(0, 0, 0, 0.06);
  --border-medium: rgba(0, 0, 0, 0.08);
  --border-input: rgba(0, 0, 0, 0.08);

  /* 主题色 */
  --accent-primary: #2563eb;
  --accent-primary-hover: #3b82f6;
  --accent-primary-light: rgba(37, 99, 235, 0.08);
  --accent-primary-medium: rgba(37, 99, 235, 0.15);

  /* 工具调用颜色 */
  --tool-color: #5478FF;
  --tool-color-hover: #3d5ce0;
  --tool-bg: rgba(84, 120, 255, 0.18);
  --tool-bg-hover: rgba(84, 120, 255, 0.28);
  --tool-border: rgba(84, 120, 255, 0.22);

  /* 附件颜色 */
  --attachment-color: #ca8a04;
  --attachment-color-hover: #a16207;
  --attachment-bg: rgba(202, 138, 4, 0.15);

  /* 状态颜色 */
  --success-color: #059669;
  --success-bg: rgba(16, 185, 129, 0.1);
  --warning-color: #d97706;
  --warning-bg: rgba(217, 119, 6, 0.1);
  --danger-color: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.08);

  /* 滚动条颜色 */
  --scrollbar-thumb: rgba(0, 0, 0, 0.08);
  --scrollbar-thumb-sidebar: rgba(0, 0, 0, 0.1);

  /* 遮罩背景 */
  --overlay-bg: rgba(0, 0, 0, 0.3);
  --avatar-gradient: linear-gradient(135deg, #3b82f6, #60a5fa);

  /* 兼容旧变量 */
  --text: var(--text-primary);
  --text-h: var(--text-primary);
  --bg: var(--bg-primary);
  --border: var(--border-light);
  --accent: var(--accent-primary);
  --accent-bg: var(--accent-primary-light);
  --accent-border: var(--accent-primary-medium);
  --social-bg: rgba(244, 243, 236, 0.5);

  --sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --heading: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono: ui-monospace, Consolas, 'JetBrains Mono', monospace;

  font: 18px/145% var(--sans);
  letter-spacing: 0.18px;
  color-scheme: light dark;
  color: var(--text-primary);
  background: var(--bg-primary);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #141414;
  --bg-tertiary: #0a0a0a;
  --bg-hover: rgba(255, 255, 255, 0.08);
  --bg-active: rgba(255, 255, 255, 0.12);
  --bg-input: #141414;
  --bg-code: #141414;
  --bg-thinking: #141414;

  --text-primary: #f0f0f0;
  --text-secondary: #a0a0a0;
  --text-tertiary: #606060;

  --border-light: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.12);
  --border-input: rgba(255, 255, 255, 0.1);

  --accent-primary: #3b82f6;
  --accent-primary-hover: #60a5fa;
  --accent-primary-light: rgba(59, 130, 246, 0.15);
  --accent-primary-medium: rgba(59, 130, 246, 0.25);

  --tool-color: #5478FF;
  --tool-color-hover: #7a96ff;
  --tool-bg: rgba(84, 120, 255, 0.28);
  --tool-bg-hover: rgba(84, 120, 255, 0.40);
  --tool-border: rgba(84, 120, 255, 0.32);

  --attachment-color: #facc15;
  --attachment-color-hover: #fde047;
  --attachment-bg: rgba(250, 204, 21, 0.22);

  --success-color: #34d399;
  --success-bg: rgba(52, 211, 153, 0.15);
  --warning-color: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.15);
  --danger-color: #f87171;
  --danger-bg: rgba(248, 113, 113, 0.15);

  --scrollbar-thumb: rgba(255, 255, 255, 0.1);
  --scrollbar-thumb-sidebar: rgba(255, 255, 255, 0.15);

  --overlay-bg: rgba(0, 0, 0, 0.6);
  --avatar-gradient: linear-gradient(135deg, #3b82f6, #60a5fa);

  /* 兼容旧变量 */
  --text: var(--text-primary);
  --text-h: var(--text-primary);
  --bg: var(--bg-primary);
  --border: var(--border-light);
  --accent: var(--accent-primary);
  --accent-bg: var(--accent-primary-light);
  --accent-border: var(--accent-primary-medium);
  --social-bg: rgba(47, 48, 58, 0.5);
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  margin: 0;
}

#app {
  height: 100%;
}

/* ============ Scrollbar ============ */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 5px;
}

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

/* ============ Ghost Button ============ */
.ghost-btn {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

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

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

.ghost-btn.success:hover {
  background: var(--success-bg);
  color: var(--success-color);
}

.ghost-btn.accent:hover {
  background: var(--accent-primary-light);
  color: var(--accent-primary);
}

/* ============ Markdown Content ============ */
.md-content {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  word-break: break-word;
}

.md-content h1,
.md-content h2,
.md-content h3 {
  margin: 0.8em 0 0.4em;
  font-weight: 600;
}

.md-content h1 { font-size: 1.4em; }
.md-content h2 { font-size: 1.2em; }
.md-content h3 { font-size: 1.1em; }

.md-content p {
  margin: 0.4em 0;
}

.md-content code {
  background: var(--bg-code);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.9em;
}

.md-content pre {
  background: var(--bg-code);
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 0.5em 0;
}

.md-content pre code {
  background: transparent;
  padding: 0;
}

.md-content blockquote {
  border-left: 3px solid var(--border-medium);
  padding-left: 12px;
  margin: 0.5em 0;
  color: var(--text-secondary);
}

.md-content ul,
.md-content ol {
  padding-left: 20px;
  margin: 0.5em 0;
}

.md-content a {
  color: var(--accent-primary);
  text-decoration: none;
}

.md-content a:hover {
  text-decoration: underline;
}

.md-content img {
  max-width: 100%;
  border-radius: 8px;
}

.md-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 0.5em 0;
}

.md-content th,
.md-content td {
  border: 1px solid var(--border-light);
  padding: 8px 12px;
  text-align: left;
}

.md-content th {
  background: var(--bg-secondary);
}

/* ============ Message Bubble Shared ============ */
.message-bubble {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  width: 100%;
}

.message-bubble.user {
  flex-direction: row-reverse;
}

.message-container {
  display: flex;
  flex-direction: column;
  min-width: 200px;
  width: 100%;
}

.message-bubble.user .message-container {
  align-items: flex-end;
  width: fit-content;
  max-width: 85%;
}

.message-bubble.assistant .message-container {
  align-items: flex-start;
  flex: 1 1 auto;
  width: 100%;
  min-width: 0;
}

.message-bubble.assistant .message-body {
  width: 100%;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: -0.3px;
  flex-shrink: 0;
}

.user .avatar {
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: white;
  font-size: 12px;
}

.assistant .avatar {
  background: var(--avatar-gradient);
  color: white;
  font-size: 12px;
}

.message-body {
  flex: 1;
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--border-light);
  border-radius: 12px;
  background: var(--bg-primary);
  transition: background 0.2s, border-color 0.2s;
}

/* ============ App Layout ============ */
.app {
  height: 100vh;
  display: flex;
  overflow: hidden;
}

.main-panel {
  flex: 1 1 0;
  min-width: 0;
  overflow: hidden;
  transition: all 0.2s;
}

/* ============ Transitions ============ */
.fade-enter-active,
.fade-leave-active {
  transition: opacity 0.2s ease;
}

.fade-enter-from,
.fade-leave-to {
  opacity: 0;
}

/* ============ Modal Overlay ============ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: 12px;
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* ============ Form ============ */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-group .hint {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

/* ============ Common Page Layout ============ */
.page-container {
  padding: 2rem;
  overflow-y: auto;
  max-height: 100vh;
}

.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  font-size: 1.75rem;
  margin: 0 0 0.5rem;
  color: var(--text-primary);
}

.page-header .subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.page-section {
  margin-bottom: 2.5rem;
}

.page-section .section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--border-light);
}

.page-section .section-header h2 {
  font-size: 1.15rem;
  margin: 0;
  color: var(--text-primary);
  font-weight: 700;
}

.page-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .page-card {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* 增强输入框和选择框样式 */
.page-card input,
.page-card select,
.page-card textarea {
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: 8px;
  padding: 0.6rem 0.85rem;
  color: var(--text-primary);
  transition: all 0.2s ease;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.04);
}

.page-card input:focus,
.page-card select:focus,
.page-card textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-primary-light), inset 0 1px 2px rgba(0, 0, 0, 0.04);
}

.page-card input:hover,
.page-card select:hover,
.page-card textarea:hover {
  border-color: var(--border-medium);
}

[data-theme="dark"] .page-card input,
[data-theme="dark"] .page-card select,
[data-theme="dark"] .page-card textarea {
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .page-card input:focus,
[data-theme="dark"] .page-card select:focus,
[data-theme="dark"] .page-card textarea:focus {
  box-shadow: 0 0 0 3px var(--accent-primary-light), inset 0 1px 2px rgba(0, 0, 0, 0.2);
}

.page-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}