/* ============================================================
   BASE — reset + typography defaults
   ============================================================ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  font-size: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "PingFang SC", "Microsoft YaHei", sans-serif,
    "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: var(--lh-body);
  font-size: var(--font-body);
  padding-top: var(--header-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4 {
  line-height: var(--lh-heading);
  font-weight: var(--fw-bold);
}

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

section[id] {
  scroll-margin-top: var(--header-height);
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}