:root {
  color-scheme: light;
  --paper: #f6f5ef;
  --surface: #fffefa;
  --ink: #242823;
  --muted: #72766d;
  --rule: #dcddd3;
  --accent: #a63c2f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

header {
  padding: 64px max(24px, calc((100% - 960px) / 2)) 40px;
  border-top: 4px solid var(--accent);
  border-bottom: 1px solid var(--rule);
  background: var(--surface);
}

h1, h2 {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", "SimSun", serif;
  font-weight: 600;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.35;
  letter-spacing: .04em;
  overflow-wrap: anywhere;
}

header p { margin: 16px 0 0; color: var(--muted); letter-spacing: .08em; }

main {
  width: min(960px, calc(100% - 48px));
  margin: 40px auto 64px;
  flex: 1;
  min-width: 0;
}

h2 {
  margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  font-size: 1.4rem;
  line-height: 1.5;
}

p { margin: 16px 0; overflow-wrap: anywhere; }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  overflow-wrap: anywhere;
}

a:hover { color: var(--ink); }

a:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

label { display: block; font-size: .9rem; font-weight: 600; }

input {
  display: block;
  width: 100%;
  margin: 10px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 1rem;
  appearance: none;
}

input::placeholder { color: var(--muted); opacity: 1; }
input:focus { border-color: var(--accent); }

#count { margin: 20px 0 12px; color: var(--muted); font-size: .85rem; font-variant-numeric: tabular-nums; }

ul { list-style: none; padding: 0; }
li { padding: 12px 0; border-bottom: 1px solid var(--rule); }

#list { margin: 0 0 32px; border-top: 1px solid var(--rule); }
#list li { padding: 24px 20px; background: var(--surface); }
#list li:hover { background: #f0efe6; }
#list li > a { font-size: 1.2rem; font-weight: 600; text-decoration: none; }
#list li > a:hover { text-decoration: underline; }
#list p { margin: 8px 0 0; color: #555b52; font-size: .95rem; }

small {
  display: inline-block;
  margin-left: 16px;
  padding: 2px 8px;
  border: 1px solid var(--rule);
  color: var(--muted);
  font-size: .75rem;
  line-height: 1.5;
  vertical-align: middle;
}

pre {
  max-width: 100%;
  overflow-x: auto;
  margin: 20px 0;
  padding: 24px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  background: var(--surface);
  font-size: .9rem;
  line-height: 1.75;
  tab-size: 4;
}

code { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }

footer {
  padding: 24px;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  text-align: center;
  font-size: .85rem;
}

footer a { margin: 0 6px; }

@media (max-width: 600px) {
  header { padding: 40px 20px 28px; }
  main { width: calc(100% - 40px); margin: 28px auto 40px; }
  #list li { padding: 20px 16px; }
  small { margin-left: 8px; }
  h2 { margin-top: 32px; }
  pre { padding: 16px; }
}