/* ========================================
 * CSS 重置和基础样式
 * ======================================== */

/* === 现代CSS重置 === */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

body {
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

/* === 基础HTML样式 === */
body {
  background-color: var(--color-background);
  font-family: var(--font-family-system);
  color: var(--color-text-primary);
  overflow-x: hidden;
}

/* === 滚动条样式 === */
::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

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

/* === 选择文本样式 === */
::selection {
  background-color: var(--color-primary);
  color: white;
}

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