:root {
  --font-serif-cn: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --bg: #000000;
  --text-copy: #efefef;
  --text-heading: #ffffff;
  --line: rgba(255, 255, 255, 0.2);
  --link-line: rgba(255, 255, 255, 0.58);
  --link-hover: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 360px;
  scrollbar-gutter: stable;
}

body {
  margin: 0 auto;
  max-width: 650px;
  padding: 4rem 2rem;
  background: var(--bg);
  color: var(--text-copy);
  font-family: var(--font-serif-cn);
  font-size: 17px;
  line-height: 1.5;
}

.site-main {
  width: 100%;
  margin-top: 0;
}

.site-title {
  margin: 0 0 0.25rem;
  color: var(--text-heading);
  font-family: var(--font-serif-cn);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 3.25rem;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.copy {
  margin: 1.25rem 0;
  color: var(--text-copy);
}

a,
.inline-link {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--link-line);
  text-decoration-thickness: 1px;
  text-underline-offset: 2.5px;
  transition: text-decoration-color 0.15s ease;
}

a:hover,
.inline-link:hover {
  text-decoration-color: var(--link-hover);
}

.inline-link {
  border: 0;
  padding: 0;
  background: transparent;
  font: inherit;
  cursor: pointer;
}

.modal-mask {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  z-index: 50;
}

.modal-mask.open {
  display: flex;
}

.modal-card {
  width: min(90vw, 340px);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  padding: 16px;
}

.modal-card h2 {
  margin: 0 0 12px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-heading);
}

.modal-close {
  float: right;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-copy);
  font: inherit;
  padding: 4px 10px;
  border-radius: 999px;
  cursor: pointer;
}

.wechat-qr {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--line);
}

@media (min-width: 768px) {
  .site-main {
    margin-top: 4rem;
  }

  .site-title {
    font-size: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}