:root {
  color-scheme: light dark;
  --bg: #f7f3ea;
  --panel: #fffdf8;
  --text: #20201d;
  --muted: #6b675f;
  --line: #ded8cb;
  --accent: #b04c32;
  --accent-soft: #f4dfd6;
  --reading-font: "Noto Sans CJK JP", "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", "Microsoft YaHei", sans-serif;
  --reading-size: 24px;
  --reading-line-height: 1.95;
  --annotation-size: 15.5px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171714;
    --panel: #211f1b;
    --text: #eee9df;
    --muted: #aaa399;
    --line: #3b3832;
    --accent: #ef9a7e;
    --accent-soft: #3a2923;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}
a { color: var(--accent); }
.site-header {
  border-bottom: 1px solid var(--line);
  padding: 14px max(20px, calc((100vw - 960px) / 2));
}
.brand { color: var(--text); font-weight: 700; text-decoration: none; }
main { width: min(960px, calc(100% - 40px)); margin: 0 auto; }
.hero { padding: 76px 0 46px; }
.eyebrow { color: var(--accent); font-size: 0.75rem; font-weight: 800; letter-spacing: .18em; }
h1 { font-size: clamp(2.2rem, 8vw, 4.5rem); letter-spacing: -.045em; line-height: 1.08; margin: .25em 0; }
h2 { margin-top: 2em; }
.hero > p:last-child, .summary { color: var(--muted); font-size: 1.08rem; }
.library { padding-bottom: 80px; }
.library ul { list-style: none; padding: 0; display: grid; gap: 12px; }
.library li a {
  display: grid;
  gap: 5px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  transition: border-color .16s ease, transform .16s ease;
}
.library li a:hover { border-color: var(--accent); transform: translateY(-1px); }
.library span { color: var(--muted); }

.note {
  margin: 36px 0 64px;
  padding: 36px 56px 60px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
}
.note > h1 { font-family: var(--reading-font); font-size: clamp(2rem, 7vw, 3.6rem); }
.note-actions { margin: 24px 0 36px; }
.note-actions a { display: inline-block; padding: 8px 13px; background: var(--accent-soft); border-radius: 9px; text-decoration: none; }

.content {
  border-top: 2px solid var(--line);
  padding-top: 22px;
  font-family: var(--reading-font);
  font-size: var(--reading-size);
  line-height: var(--reading-line-height);
  letter-spacing: .03em;
  word-break: normal;
  overflow-wrap: normal;
  line-break: strict;
  text-wrap: pretty;
  hyphens: none;
}
.content p { margin: 1.25em 0; }
.content h1 { font-size: 38px; line-height: 1.25; letter-spacing: .02em; border-bottom: 2px solid var(--line); padding-bottom: .35em; }
.content h2 { font-size: 28px; line-height: 1.35; margin: 1.8em 0 .75em; }
.content h3 { font-size: 23px; line-height: 1.4; margin: 1.5em 0 .65em; }
.content strong {
  font-weight: 850;
  background: color-mix(in srgb, var(--accent) 13%, transparent);
  padding: .03em .18em;
  border-radius: .28em;
  white-space: nowrap;
  word-break: keep-all;
}
.content ruby { ruby-align: center; ruby-position: over; margin: 0 .04em; white-space: nowrap; word-break: keep-all; }
.content rt { color: color-mix(in srgb, var(--text) 88%, var(--muted)); font-size: .46em; font-weight: 500; letter-spacing: 0; line-height: 1; }
.content blockquote {
  margin: .15em 0 1.65em;
  padding: .85em 1.05em .9em;
  border: 1px solid var(--line);
  border-left: 5px solid var(--accent);
  border-radius: 12px;
  background: color-mix(in srgb, var(--panel) 72%, var(--accent-soft));
  color: var(--text);
  font-size: var(--annotation-size);
  line-height: 1.7;
  letter-spacing: .01em;
}
.content p + blockquote { margin-top: -1.15em; }
.content blockquote > :first-child { margin-top: .3em; }
.content blockquote > :last-child { margin-bottom: .3em; }
.content blockquote strong {
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
  padding: 0 .06em;
  border-radius: .15em;
}
.content code { background: var(--accent-soft); border-radius: 4px; padding: .15em .35em; }
.content table { width: 100%; border-collapse: collapse; display: block; overflow-x: auto; font-size: .9em; }
.content th, .content td { border: 1px solid var(--line); padding: 8px 11px; text-align: left; vertical-align: middle; }
.content img { max-width: 100%; border-radius: 12px; }
.content hr { margin: 2.3em 0; }

footer { border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; padding: 22px max(20px, calc((100vw - 960px) / 2)); }

@media (max-width: 900px) {
  :root { --reading-size: 20px; --reading-line-height: 1.85; --annotation-size: 14.5px; }
  main { width: 100%; }
  .hero, .library { margin-left: 20px; margin-right: 20px; }
  .note { margin: 0; padding: 24px 20px 48px; border: 0; border-radius: 0; }
  .content h1 { font-size: 32px; }
  .content blockquote { margin-bottom: 1.4em; padding: .8em .9em; }
}

@media print {
  body { background: #fff; color: #111; }
  .site-header, .note-actions, footer { display: none; }
  main { width: 100%; }
  .note { margin: 0; padding: 0; border: 0; }
  .content { font-size: 18px; line-height: 1.8; }
  .content blockquote { break-inside: avoid; page-break-inside: avoid; }
  .content ruby, .content strong { white-space: nowrap; }
}