/* ============================================
   基础样式 - Base Styles
   ============================================ */

/* ========== 样式重置 - Reset ========== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--base-font-size, 14px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  height: 100vh;
  overflow: hidden;
  transition: background 0.3s cubic-bezier(0.4, 0, 0.2, 1), color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  scroll-behavior: smooth;
}

#app {
  height: 100vh;
  overflow: hidden;
  min-width: 800px;
}

/* ========== 排版 - Typography ========== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
}

h1 { font-size: var(--font-3xl); }
h2 { font-size: var(--font-2xl); }
h3 { font-size: var(--font-xl); }
h4 { font-size: var(--font-lg); }
h5 { font-size: var(--font-base); }
h6 { font-size: var(--font-sm); }

p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-4);
}

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

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

/* ========== 列表 - Lists ========== */
ul, ol {
  padding-left: var(--spacing-6);
  margin-bottom: var(--spacing-4);
}

li {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-1);
}

/* ========== 代码 - Code ========== */
code {
  padding: 2px 6px;
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Consolas', monospace;
  font-size: 0.9em;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
}

pre {
  padding: var(--spacing-4);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-4);
}

pre code {
  padding: 0;
  background: none;
  font-size: var(--font-sm);
  line-height: var(--line-height-relaxed);
}

/* ========== 分隔线 - Divider ========== */
hr {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin: var(--spacing-6) 0;
}

/* ========== 引用 - Blockquote ========== */
blockquote {
  padding-left: var(--spacing-4);
  border-left: 3px solid var(--color-primary);
  color: var(--color-text-muted);
  font-style: italic;
  margin-bottom: var(--spacing-4);
}

/* ========== 滚动条 - Scrollbar ========== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
  transition: background 0.2s ease;
}

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

* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

/* ============================================
   工具类 - Utility Classes
   ============================================ */

/* ========== 显示/隐藏 ========== */
.hidden { display: none !important; }
.invisible { visibility: hidden; }
.visible { visibility: visible; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ========== Flex 布局 ========== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }
.flex-1 { flex: 1 1 0%; }
.flex-auto { flex: 1 1 auto; }
.flex-shrink-0 { flex-shrink: 0; }
.flex-grow { flex-grow: 1; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }

.self-auto { align-self: auto; }
.self-start { align-self: flex-start; }
.self-center { align-self: center; }
.self-end { align-self: flex-end; }
.self-stretch { align-self: stretch; }

.gap-0 { gap: 0; }
.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-5 { gap: var(--spacing-5); }
.gap-6 { gap: var(--spacing-6); }
.gap-8 { gap: var(--spacing-8); }

/* ========== Grid 布局 ========== */
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ========== 宽度/高度 ========== */
.w-full { width: 100%; }
.w-auto { width: auto; }
.w-1\/2 { width: 50%; }
.w-1\/3 { width: 33.333333%; }
.w-1\/4 { width: 25%; }
.max-w-full { max-width: 100%; }
.min-w-0 { min-width: 0; }

.h-full { height: 100%; }
.h-auto { height: auto; }
.min-h-0 { min-height: 0; }
.min-h-screen { min-height: 100vh; }

/* ========== 内外边距 ========== */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mt-auto { margin-top: auto; }
.mb-auto { margin-bottom: auto; }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-1); }
.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-5 { padding: var(--spacing-5); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

.px-2 { padding-left: var(--spacing-2); padding-right: var(--spacing-2); }
.px-3 { padding-left: var(--spacing-3); padding-right: var(--spacing-3); }
.px-4 { padding-left: var(--spacing-4); padding-right: var(--spacing-4); }
.px-6 { padding-left: var(--spacing-6); padding-right: var(--spacing-6); }

.py-2 { padding-top: var(--spacing-2); padding-bottom: var(--spacing-2); }
.py-3 { padding-top: var(--spacing-3); padding-bottom: var(--spacing-3); }
.py-4 { padding-top: var(--spacing-4); padding-bottom: var(--spacing-4); }

/* ========== 文字对齐 ========== */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-justify { text-align: justify; }

/* ========== 文字溢出 ========== */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ========== 字重 ========== */
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* ========== 文字颜色 ========== */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }
.text-white { color: white; }

/* ========== 背景色 ========== */
.bg-primary { background-color: var(--color-bg-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }
.bg-card { background-color: var(--color-bg-card); }
.bg-input { background-color: var(--color-bg-input); }
.bg-accent { background-color: var(--color-primary); }
.bg-accent-alpha-10 { background-color: var(--color-primary-alpha-10); }

/* ========== 位置 ========== */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

.inset-0 { inset: 0; }
.top-0 { top: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.left-0 { left: 0; }

/* ========== 溢出 ========== */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }
.overflow-visible { overflow: visible; }

/* ========== 交互 ========== */
.pointer-events-none { pointer-events: none; }
.pointer-events-auto { pointer-events: auto; }
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }
.cursor-default { cursor: default; }

/* ========== 选择 ========== */
.select-none {
  user-select: none;
  -webkit-user-select: none;
}

.select-all {
  user-select: all;
  -webkit-user-select: all;
}

.select-text {
  user-select: text;
  -webkit-user-select: text;
}

/* ========== Z-index ========== */
.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-50 { z-index: 50; }
.z-100 { z-index: 100; }
.z-1000 { z-index: 1000; }

/* ========== 圆角 ========== */
.rounded-none { border-radius: 0; }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* ========== 边框 ========== */
.border-0 { border-width: 0; }
.border { border-width: 1px; }
.border-solid { border-style: solid; }
.border-default { border-color: var(--color-border); }
.border-light { border-color: var(--color-border-light); }

/* ========== 阴影 ========== */
.shadow-none { box-shadow: none; }
.shadow-xs { box-shadow: var(--shadow-xs); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* ========== 过渡动画 ========== */
.transition-fast { transition: all var(--transition-fast); }
.transition-normal { transition: all var(--transition-normal); }
.transition-slow { transition: all var(--transition-slow); }