/* ================================
   基础样式 - Reset & Typography
   ================================ */

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

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  background-color: var(--bg-color);
  overflow: hidden;
}

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

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

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  outline: none;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

ul, ol {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-bg);
  border-radius: var(--border-radius-full);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--border-radius-full);
}

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

/* 文本截断 */
.text-ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

/* 文本对齐 */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* 字体大小 */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }

/* 字体颜色 */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-success { color: #22c55e; }
.text-warning { color: #f59e0b; }
.text-danger { color: #ef4444; }
.text-info { color: #3b82f6; }

/* Flex 工具类 */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

/* Grid 工具类 */
.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-7 { grid-template-columns: repeat(7, minmax(0, 1fr)); }

/* Spacing 工具类 */
.p-1 { padding: 4px; }
.p-2 { padding: 8px; }
.p-3 { padding: 12px; }
.p-4 { padding: 16px; }
.p-6 { padding: 24px; }
.px-2 { padding-left: 8px; padding-right: 8px; }
.px-3 { padding-left: 12px; padding-right: 12px; }
.px-4 { padding-left: 16px; padding-right: 16px; }
.py-1 { padding-top: 4px; padding-bottom: 4px; }
.py-2 { padding-top: 8px; padding-bottom: 8px; }
.py-3 { padding-top: 12px; padding-bottom: 12px; }
.m-1 { margin: 4px; }
.m-2 { margin: 8px; }
.m-3 { margin: 12px; }
.m-4 { margin: 16px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

/* 隐藏 */
.hidden { display: none !important; }

/* 滚动 */
.overflow-auto { overflow: auto; }
.overflow-hidden { overflow: hidden; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

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

/* 宽高 */
.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* 圆角 */
.rounded { border-radius: var(--border-radius-md); }
.rounded-sm { border-radius: var(--border-radius-sm); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.rounded-full { border-radius: var(--border-radius-full); }

/* 边框 */
.border { border: 1px solid var(--border-color); }
.border-t { border-top: 1px solid var(--border-color); }
.border-b { border-bottom: 1px solid var(--border-color); }
.border-l { border-left: 1px solid var(--border-color); }
.border-r { border-right: 1px solid var(--border-color); }

/* 背景 */
.bg-white { background-color: #ffffff; }
.bg-gray { background-color: var(--bg-color-secondary); }

/* 动画 */
@keyframes spin {
  to { transform: rotate(360deg); }
}

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

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

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

@keyframes scaleIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* ================================
   页面切换动画
   ================================ */

.page-enter {
  animation: pageEnter 0.3s ease forwards;
}

.page-leave {
  animation: pageLeave 0.2s ease forwards;
}

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

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

/* ================================
   键盘快捷键提示样式
   ================================ */

.shortcut-hint {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  z-index: var(--z-tooltip);
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
}

.shortcut-hint.show {
  opacity: 1;
  transform: translateY(0);
}

.shortcut-hint kbd {
  display: inline-block;
  padding: 2px 6px;
  background: var(--bg-color-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-family: monospace;
  font-size: 11px;
  margin: 0 2px;
}