/* 太虛蝕道錄 連載站
   固定夜讀配色：深青石底，配雨夜主圖（2026-10-24 用戶決定拿掉日夜切換）。
   色彩：墨、銅鏽綠（洗道壺的青銅）、硃砂（印）。 */
:root {
  --paper: #18211f;
  --paper-2: #202b28;
  --ink: #cfd3c8;
  --ink-soft: #8f998f;
  --verdigris: #6fae9c;
  --cinnabar: #c4513f;
  --rule: #34413d;
  --on-cover: #e9e6dc;
  --on-cover-soft: #b9bbb0;
  --body-size: 19px;
  --display: "LXGW WenKai TC", "Noto Serif TC", serif;
  --serif: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  color-scheme: dark;
}
:root[data-size="s"] { --body-size: 17px; }
:root[data-size="l"] { --body-size: 22px; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: var(--body-size);
  line-height: 1.95;
}
main { flex: 1 0 auto; }
a { color: var(--verdigris); text-underline-offset: 0.2em; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 3px;
}

/* 頁首：文字連結，不用按鈕外框 */
.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  max-width: 42rem;
  margin: 0 auto;
  padding: 14px 16px;
  font-size: 15px;
  line-height: 1.4;
}
.bar .home {
  font-family: var(--display);
  font-size: 18px;
  color: var(--ink);
  text-decoration: none;
}
.prefs { display: flex; gap: 18px; }
.prefs a, .prefs button {
  font: inherit;
  font-size: 15px;
  color: var(--ink-soft);
  background: none;
  border: 0;
  padding: 4px 0;
  cursor: pointer;
  text-decoration: none;
}
.prefs a:hover, .prefs button:hover { color: var(--ink); }

/* 首頁頁首浮在封面上 */
.bar.on-cover {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  max-width: none;
  padding: 18px clamp(16px, 4vw, 48px);
  z-index: 2;
}
.bar.on-cover .prefs a, .bar.on-cover .prefs button { color: var(--on-cover-soft); }
.bar.on-cover .prefs a:hover, .bar.on-cover .prefs button:hover { color: var(--on-cover); }

/* 封面：左邊主圖（書法標題壓在圖上），右邊簡介；往下捲是連載章節 */
.cover {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1fr);
  min-height: 100vh;
  min-height: 100svh;
}
.cover-art {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 96px 24px 64px;
  background: #121816 url("img/hero.webp") 30% center / cover no-repeat;
  color: var(--on-cover);
}
.cover-art::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(0deg, var(--paper) 0%, rgba(24, 33, 31, 0) 22%),
    linear-gradient(90deg, rgba(14, 19, 17, 0.5) 0%, rgba(14, 19, 17, 0.3) 45%, rgba(24, 33, 31, 0.85) 82%, var(--paper) 99%);
}
.cover-art > * { position: relative; }
.cover-text {
  align-self: center;
  justify-self: center;
  max-width: 36rem;
  font-size: clamp(20px, 1.5vw, 23px);
  padding: 96px clamp(16px, 4vw, 56px) 64px clamp(16px, 3vw, 40px);
}
.to-toc {
  display: inline-block;
  margin-top: 36px;
  font-size: 17px;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}
.to-toc:hover { color: var(--ink); }
.title-v {
  writing-mode: vertical-rl;
  font-family: var(--display);
  font-weight: normal;
  font-size: clamp(56px, 9vw, 104px);
  line-height: 1;
  letter-spacing: 0.08em;
  margin: 0;
  padding: 0 18px 0 0;
  border-right: 2px solid var(--verdigris);
  color: var(--on-cover);
}
.title-img { writing-mode: horizontal-tb; display: flex; flex-direction: column; align-items: center; border-right: 0; padding: 0; }
.title-img img { display: block; height: clamp(300px, 56vh, 560px); width: auto; }
/* 直式長方印：兩字上下排，內框模仿白文印的印邊 */
.seal {
  display: block;
  writing-mode: vertical-rl;
  font-family: var(--display);
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1;
  letter-spacing: 0.15em;
  padding: 0.35em 0.3em 0.2em;
  margin-top: 0.9em;
  background: #a8352a;
  color: #f1e8dc;
  border-radius: 3px;
  box-shadow: inset 0 0 0 2px #a8352a, inset 0 0 0 3.5px rgba(241, 232, 220, 0.75);
  transform: rotate(-3deg);
}
/* 書法圖的印章蓋在最後一字左下，像落款 */
.title-img { position: relative; width: max-content; justify-self: end; }
.title-img .seal { position: absolute; left: 0; bottom: 2%; margin: 0; transform: translateX(-85%) rotate(-3deg); }
.genre { margin: 0 0 20px; color: var(--ink-soft); font-size: 17px; letter-spacing: 0.1em; }
.blurb p { margin: 0 0 0.9em; }
.status { margin: 18px 0 0; font-size: 17px; color: var(--ink-soft); }
.soon {
  margin: 28px 0 0;
  font-family: var(--display);
  font-size: 26px;
  color: var(--ink);
  border-left: 3px solid #a8352a;
  padding-left: 12px;
}
.start {
  display: inline-block;
  margin-top: 22px;
  padding: 8px 24px;
  background: #a8352a;
  color: #f4efe6;
  font-family: var(--display);
  font-size: 19px;
  text-decoration: none;
  border-radius: 3px;
}
.start:hover { background: #c4513f; }

/* 目錄 */
.toc {
  max-width: 42rem;
  margin: 72px auto 0;
  scroll-margin-top: 24px;
  padding: 0 16px;
}
.toc h2 {
  font-family: var(--display);
  font-weight: normal;
  font-size: 26px;
  margin: 0 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
}
.toc ol { list-style: none; margin: 0; padding: 0; }
.toc li { border-bottom: 1px dashed var(--rule); }
.toc a {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 2px;
  color: var(--ink);
  text-decoration: none;
}
.toc a:hover .ch-name { color: var(--verdigris); }
.toc-empty { color: var(--ink-soft); font-size: 18px; }
.toc time { color: var(--ink-soft); font-size: 14px; white-space: nowrap; align-self: center; }

/* 章節頁 */
.chapter {
  max-width: 34em;
  margin: 0 auto;
  padding: 8px 16px 0;
}
.chapter h1 {
  font-family: var(--display);
  font-weight: normal;
  font-size: 1.6em;
  line-height: 1.4;
  margin: 1.2em 0 1.6em;
  text-align: center;
}
.chapter h1 .num {
  display: block;
  font-size: 0.6em;
  color: var(--cinnabar);
  letter-spacing: 0.2em;
}
.chapter p { margin: 0 0 1.1em; text-align: justify; }
.chapter strong { color: var(--verdigris); font-weight: 700; }
.chapter blockquote {
  margin: 1.4em 0;
  padding: 0.4em 1.2em;
  border-left: 3px solid var(--cinnabar);
  background: var(--paper-2);
}
.chapter blockquote p { margin: 0.3em 0; }

.pager {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  max-width: 34em;
  margin: 3em auto 0;
  padding: 18px 16px;
  border-top: 1px solid var(--rule);
  font-size: 16px;
  line-height: 1.5;
}
.pager a { text-decoration: none; }
.pager .prev { justify-self: start; }
.pager .next { justify-self: end; text-align: right; }
.pager .none { color: var(--ink-soft); }

footer {
  width: 100%;
  max-width: 42rem;
  margin: 48px auto 0;
  padding: 18px 16px 32px;
  font-size: 13px;
  color: var(--ink-soft);
}

@media (max-width: 760px) {
  .cover { grid-template-columns: 1fr; min-height: 0; }
  .cover-art { min-height: 62svh; padding: 72px 16px 28px; background-position: 70% center; }
  .cover-art::before { background: linear-gradient(0deg, var(--paper) 0%, rgba(14, 19, 17, 0.45) 35%, rgba(14, 19, 17, 0.35) 100%); }
  .cover-text { max-width: none; padding: 8px 16px 0; }
  .title-v { font-size: clamp(40px, 11vw, 56px); padding-right: 12px; }
  .title-img img { height: 50svh; }
  .seal { font-size: 15px; }
  .blurb p { font-size: 18px; }
  .toc { margin-top: 48px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}