/* Rubify site. System fonts only: the pages make no third-party requests. */
:root {
  --ink: #1d1b1a;
  --muted: #5d5753;
  --paper: #fbf8f3;
  --card: #ffffff;
  --rule: #e6ded3;
  --seal: #b71c1c;
  --pinyin: #0d3b91;
  --measure: 40rem;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ece7e1;
    --muted: #b1aaa3;
    --paper: #16130f;
    --card: #1f1b16;
    --rule: #3a332b;
    --seal: #ef6b5f;
    --pinyin: #9db8f2;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans SC",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding-inline: 20px;
}

main,
.site-header,
.site-footer {
  max-width: var(--measure);
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.25rem;
  border-bottom: 1px solid var(--rule);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
}

.brand img { width: 32px; height: 32px; border-radius: 8px; }

nav a { color: var(--muted); text-decoration: none; margin-left: 1rem; }
nav a:hover, nav a:focus-visible { color: var(--ink); text-decoration: underline; }

main { padding-block: 2.5rem 3rem; }

h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 0.5rem; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; margin: 2.25rem 0 0.5rem; }
p, ul { margin: 0 0 1rem; }
ul { padding-left: 1.25rem; }
li { margin-bottom: 0.35rem; }
a { color: var(--pinyin); }
strong { font-weight: 650; }

.lede { font-size: 1.15rem; color: var(--muted); }
.meta { color: var(--muted); font-size: 0.9rem; }

/* The hero shows what the app does: pinyin set above the characters. */
.demo {
  margin: 2rem 0 2.25rem;
  padding: 1.75rem 1.5rem 1.25rem;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 14px;
  text-align: center;
}

.demo-text {
  margin: 0;
  font-size: clamp(1.9rem, 8vw, 3.2rem);
  line-height: 1.9;
  letter-spacing: 0.08em;
  overflow-wrap: anywhere;
}

.demo ruby { ruby-position: over; }

.demo rt {
  font-size: 0.34em;
  letter-spacing: 0;
  color: var(--pinyin);
  font-weight: 600;
}

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.5rem 0 0.5rem; }

.button {
  display: inline-block;
  padding: 0.65rem 1.1rem;
  border-radius: 999px;
  border: 1px solid var(--rule);
  color: var(--ink);
  background: var(--card);
  text-decoration: none;
  font-weight: 600;
}

.button.primary { background: var(--seal); border-color: var(--seal); color: #fff; }
.button:hover, .button:focus-visible { filter: brightness(1.06); text-decoration: underline; }

.note {
  margin: 1.25rem 0 0;
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--seal);
  border-radius: 6px;
  background: var(--card);
  color: var(--muted);
  font-size: 0.95rem;
}

.note strong { color: var(--ink); }

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

.summary {
  background: var(--card);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--seal);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}

.summary p:last-child { margin-bottom: 0; }

.site-footer {
  padding-block: 1.25rem 2rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9rem;
}