/* 忘言 · csviim.com
   一页被点亮的书，浮在暗处的书架之上。 */

:root {
  --paper: #F6F3EC;
  --ink: #1F2328;
  --moss: #486B5A;
  --faint: #6E7069;
  --rule: #DED9CC;
  --ghost: .05;
  --serif: "Iowan Old Style", Georgia, "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --mono: ui-monospace, "SF Mono", Menlo, "JetBrains Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #14171A;
    --ink: #D8D4C8;
    --moss: #7FA893;
    --faint: #8B8E86;
    --rule: #2B2F33;
    --ghost: .07;
  }
}

* { box-sizing: border-box; }
html { font-size: 17px; }
body {
  margin: 0;
  font-family: var(--serif);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.95;
  -webkit-font-smoothing: antialiased;
}

/* 书架：边缘处几乎不可见的随机字母（巴别图书馆的字符集） */
.shelf {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  padding: .5rem;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 2.3;
  letter-spacing: .38em;
  word-break: break-all;
  color: var(--ink);
  opacity: var(--ghost);
  pointer-events: none;
  user-select: none;
}

/* 书页 */
.page {
  position: relative;
  z-index: 1;
  max-width: 40rem;
  margin: 0 auto;
  min-height: 100vh;
  background: var(--paper);
  border-inline: 1px solid var(--rule);
  padding: 3.2rem 2.9rem 4.5rem;
}

/* 书脊：宽屏时竖排在左侧 */
.spine {
  display: none;
  position: fixed;
  z-index: 2;
  top: 2.6rem;
  left: 2.4rem;
  writing-mode: vertical-rl;
  font-size: 1.45rem;
  letter-spacing: .55em;
  color: var(--ink);
  text-decoration: none;
}
.spine small {
  display: block;
  margin-top: 1.1em;
  font-family: var(--mono);
  font-size: .58rem;
  letter-spacing: .28em;
  color: var(--faint);
  writing-mode: vertical-rl;
  text-orientation: mixed;
}
@media (min-width: 1100px) {
  .spine { display: block; }
  .top .home { visibility: hidden; }
}

/* 页眉：站名 + 语言切换 */
.top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 3.2rem;
}
.top .home {
  font-size: 1.15rem;
  letter-spacing: .3em;
  text-decoration: none;
  color: var(--ink);
}
.lang {
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--faint);
}
.lang b { color: var(--ink); font-weight: 600; }
.lang a { color: var(--moss); }

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: .02em;
  margin: 0 0 2.2rem;
}

/* 正文 */
.prose p { margin: 1.35em 0; }
.prose strong { font-weight: 650; }
.prose hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2.8rem 0;
}
/* 留给明天的我的话 */
.prose blockquote {
  margin: 2.6rem 0 0;
  padding-left: 1.3rem;
  border-left: 2px solid var(--moss);
  font-size: .96em;
}
.prose ol, .prose ul { padding-left: 1.6em; }
.prose li { margin: .45em 0; }

a { color: var(--moss); text-underline-offset: .22em; text-decoration-thickness: 1px; }
a:focus-visible, .lang a:focus-visible {
  outline: 2px solid var(--moss);
  outline-offset: 3px;
  border-radius: 1px;
}
::selection { background: var(--moss); color: var(--paper); }

/* 译注（英文页） */
.transnote {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--faint);
  margin: -1.4rem 0 2.6rem;
}

/* 首页：开场与目录 */
.intro { margin: 0 0 2.6rem; }
.entries { list-style: none; margin: 0; padding: 0; }
.entries li {
  display: flex;
  gap: 1.3rem;
  align-items: baseline;
  padding: .55rem 0;
  border-top: 1px solid var(--rule);
}
.entries li:last-child { border-bottom: 1px solid var(--rule); }
.entries time {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--faint);
  flex-shrink: 0;
}
.entries a { color: var(--ink); text-decoration: none; }
.entries a:hover { color: var(--moss); }

/* 前一日 / 后一日 */
.entry-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3.6rem;
  font-family: var(--mono);
  font-size: .76rem;
}
.entry-nav span { color: var(--faint); }

/* 页脚牌记 */
.colophon {
  margin-top: 4.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .05em;
  color: var(--faint);
}
.colophon a { color: var(--faint); }
.colophon a:hover { color: var(--moss); }

@media (max-width: 760px) {
  html { font-size: 16px; }
  .page { padding: 2.4rem 1.35rem 3.5rem; border-inline: 0; }
  h1 { font-size: 1.32rem; }
  .top { margin-bottom: 2.4rem; }
  .entries li { flex-direction: column; gap: 0; }
}

@media print {
  .shelf, .spine, .lang, .entry-nav { display: none; }
  .page { border: 0; }
}