/**
 * CSS Reset - Modern CSS Reset
 * 现代化的CSS重置样式
 */

/* Box sizing */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Remove default margin and padding */
* {
  margin: 0;
  padding: 0;
}

/* HTML and Body */
html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html, body {
  height: 100%;
}

body {
  line-height: 1.5;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

/* Remove list styles */
ul, ol {
  list-style: none;
}

/* Images and media */
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

/* Form elements */
input, button, textarea, select {
  font: inherit;
  color: inherit;
}

/* Remove button styling */
button {
  background: none;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

/* Links */
a {
  color: inherit;
  text-decoration: none;
}

/* Remove default textarea resize */
textarea {
  resize: vertical;
}

/* Table */
table {
  border-collapse: collapse;
  border-spacing: 0;
}

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

/* Remove touch highlight on mobile */
* {
  -webkit-tap-highlight-color: transparent;
}

/* Smooth scrolling */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

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