/* ==========================================================================
   基礎重置：僅做必要的正規化，不引入額外框架樣式
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
}

ul[class], ol[class] {
  list-style: none;
  padding: 0;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  font-family: var(--font-base);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-ink);
  background-color: var(--color-snow);
  -webkit-font-smoothing: antialiased;
}

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

figure {
  margin: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  cursor: pointer;
  background: none;
  border: none;
}

table {
  border-collapse: collapse;
  width: 100%;
}

/* 尊重使用者的動態減少偏好設定 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 可見的鍵盤焦點樣式，確保可及性 */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}