/* ============================================
   玄晶引擎3.0 - CSS重置与基础样式
   ============================================ */

/* 盒模型重置 */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* 文档基础 */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* 页面基础 */
body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

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

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

/* 选中文本样式 */
::selection {
  background: rgba(65, 105, 225, 0.4);
  color: var(--color-text-primary);
}

/* 链接重置 */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* 列表重置 */
ul,
ol {
  list-style: none;
}

/* 图片重置 */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 表单元素重置 */
input,
textarea,
select,
button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
  transition: all var(--transition-fast);
}

/* 禁用状态 */
button:disabled,
input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* 焦点样式 */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* 隐藏元素 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 清除浮动 */
.clearfix::after {
  content: '';
  display: table;
  clear: both;
}