/* ============================================
   Cathay Tales — Stylesheet
   Design: scholar's notebook, dignified, readable
   ============================================ */

:root {
  --color-ink: #1a1614;
  --color-ink-soft: #4a3f38;
  --color-ink-faint: #847168;
  --color-paper: #faf6f0;
  --color-paper-warm: #f3ece0;
  --color-accent: #8b3a3a;     /* 朱砂 - vermillion */
  --color-accent-soft: #b86060;
  --color-rule: #d9cfc0;
  --color-quote-bg: #f0e9da;

  --font-serif-en: 'Cormorant Garamond', 'Georgia', serif;
  --font-serif-zh: 'Noto Serif SC', 'Source Han Serif SC', 'STZhongsong', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;

  --max-width: 720px;
  --max-width-wide: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-ink: #ebe4d7;
    --color-ink-soft: #c4b8a6;
    --color-ink-faint: #8b7e6c;
    --color-paper: #1c1814;
    --color-paper-warm: #25201a;
    --color-accent: #d97777;
    --color-accent-soft: #b86060;
    --color-rule: #3d3530;
    --color-quote-bg: #25201a;
  }
}

* { box-sizing: border-box; }

html {
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-serif-en);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ============================================
   Site Header
   ============================================ */
.site-header {
  border-bottom: 1px solid var(--color-rule);
  padding: 1.25rem 0;
  background: var(--color-paper-warm);
}
.site-header .container {
  max-width: var(--max-width-wide);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-ink);
}
.brand-mark {
  display: block;
  width: 1.6rem;
  height: 1.6rem;
  object-fit: cover;
  border-radius: 50%;
  border: 1px solid var(--color-accent);
  background: var(--color-paper, #f6efe1);
  flex-shrink: 0;
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-en {
  font-family: var(--font-serif-en);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.brand-zh {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--color-ink-faint);
  letter-spacing: 0.02em;
}
.site-nav {
  display: flex;
  gap: 1.5rem;
}
.site-nav a {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 0.2s;
}
.site-nav a:hover {
  color: var(--color-accent);
}

/* ============================================
   Hero / Index
   ============================================ */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
}
.hero h1 {
  font-size: 2.5rem;
  font-weight: 500;
  font-style: italic;
  line-height: 1.25;
  margin: 0 0 1.5rem;
  color: var(--color-ink);
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--color-ink-soft);
  max-width: 580px;
  margin: 0 auto 1rem;
}

.tale-list {
  padding: 2rem 0;
  border-top: 1px solid var(--color-rule);
}
.tale-list h2 {
  font-family: var(--font-serif-zh);
  font-size: 1.5rem;
  font-weight: 500;
  margin: 0 0 1.5rem;
  text-align: center;
  letter-spacing: 0.1em;
}
.tale-card {
  padding: 1.5rem 0;
  border-bottom: 1px dashed var(--color-rule);
}
.tale-card:last-child { border-bottom: none; }
.tale-card a {
  text-decoration: none;
  color: var(--color-ink);
  display: block;
}
.tale-card h3 {
  font-size: 1.5rem;
  font-weight: 500;
  margin: 0 0 0.5rem;
  color: var(--color-accent);
}
.tale-card .meta {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--color-ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}
.tale-card .excerpt {
  font-size: 1rem;
  color: var(--color-ink-soft);
  font-style: italic;
  margin: 0;
}
.tale-card a:hover h3 { color: var(--color-accent-soft); }

/* ============================================
   Post / Article
   ============================================ */
.post {
  padding: 3rem 0 2rem;
}
.post-meta-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--color-ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.series-label { font-weight: 500; }

.post h1 {
  font-size: 2.4rem;
  font-weight: 500;
  font-style: italic;
  line-height: 1.2;
  margin: 0 0 1.5rem;
  color: var(--color-ink);
}
.post h2 {
  font-family: var(--font-serif-zh);
  font-size: 1.3rem;
  font-weight: 500;
  margin: 3rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-rule);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}
.post p {
  font-size: 1.05rem;
  margin: 0 0 1.2rem;
}
.post em { color: var(--color-ink); }
.post strong { color: var(--color-ink); font-weight: 600; }

/* Original Chinese text — bilingual quote block */
.post blockquote {
  background: var(--color-quote-bg);
  border-left: 3px solid var(--color-accent);
  margin: 1.5rem 0;
  padding: 1.2rem 1.5rem;
  font-family: var(--font-serif-zh);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-ink);
  border-radius: 0 4px 4px 0;
}
.post blockquote p { margin: 0 0 0.8rem; }
.post blockquote p:last-child { margin: 0; }

/* Footnote references */
.post a[href^="#fn"],
.post .footnote-ref a {
  text-decoration: none;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.8em;
  vertical-align: super;
  padding: 0 0.15em;
}
.post a[href^="#fn"]:hover { color: var(--color-accent-soft); }

/* Footnotes section */
.footnotes {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-rule);
  font-size: 0.92rem;
  color: var(--color-ink-soft);
}
.footnotes ol { padding-left: 1.5rem; }
.footnotes li { margin-bottom: 0.8rem; }
.footnotes p { margin: 0; font-size: inherit; }
.footnotes a[href^="#fnref"] {
  text-decoration: none;
  color: var(--color-accent);
  margin-left: 0.3em;
}

.post hr {
  border: none;
  border-top: 1px solid var(--color-rule);
  margin: 2.5rem 0;
  text-align: center;
}
.post hr::after {
  content: "❦";
  display: inline-block;
  position: relative;
  top: -0.7em;
  background: var(--color-paper);
  padding: 0 1rem;
  color: var(--color-accent);
  font-size: 1.2rem;
}

/* ============================================
   Post footer — CTA, subscribe, KDP promo
   ============================================ */
.post-footer {
  margin-top: 3rem;
  padding-top: 1rem;
}
.post-footer .cta {
  font-size: 1.1rem;
  color: var(--color-ink);
  text-align: center;
  margin: 1.5rem 0 1rem;
}
.subscribe-form {
  display: flex;
  gap: 0.5rem;
  max-width: 480px;
  margin: 1rem auto 1.5rem;
}
.subscribe-form input {
  flex: 1;
  padding: 0.7rem 1rem;
  border: 1px solid var(--color-rule);
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  background: var(--color-paper);
  color: var(--color-ink);
}
.subscribe-form button {
  padding: 0.7rem 1.2rem;
  border: none;
  background: var(--color-accent);
  color: white;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}
.subscribe-form button:hover { background: var(--color-accent-soft); }

/* Beehiiv inline embed wrapper — keep the iframe centered and limited in width */
.beehiiv-embed {
  max-width: 480px;
  margin: 1rem auto 1.5rem;
}
.beehiiv-embed iframe {
  width: 100% !important;
  border: none;
  background: transparent;
}

.kdp-promo {
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-ink-faint);
  font-style: italic;
  margin-top: 1.5rem;
}

/* ============================================
   About / Subscribe sections (index)
   ============================================ */
.about, .subscribe-section {
  padding: 3rem 0;
  border-top: 1px solid var(--color-rule);
}
.about h2, .subscribe-section h2 {
  font-family: var(--font-serif-zh);
  font-size: 1.5rem;
  font-weight: 500;
  margin: 0 0 1rem;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}
.about p { font-size: 1rem; color: var(--color-ink-soft); }
.series-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  display: grid;
  gap: 0.9rem;
}
.series-list li {
  padding: 0.85rem 1.1rem;
  border-left: 3px solid var(--color-accent);
  background: rgba(166, 76, 60, 0.04);
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--color-ink-soft);
  border-radius: 0 4px 4px 0;
}
.series-list li strong {
  color: var(--color-ink);
  font-weight: 600;
}
.about-tag {
  margin-top: 1.5rem;
  padding: 0.9rem 1.1rem;
  font-style: italic;
  color: var(--color-ink-soft);
  border-top: 1px solid var(--color-rule, #e3dccc);
  border-bottom: 1px solid var(--color-rule, #e3dccc);
  text-align: center;
}
.subscribe-section { text-align: center; }
.subscribe-section p { color: var(--color-ink-soft); }

/* ============================================
   Site Footer
   ============================================ */
.site-footer {
  margin-top: 4rem;
  padding: 2rem 0;
  border-top: 1px solid var(--color-rule);
  background: var(--color-paper-warm);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-ink-faint);
}
.site-footer a { color: var(--color-accent); text-decoration: none; }
.site-footer .footer-zh {
  font-family: var(--font-serif-zh);
  font-size: 0.9rem;
  color: var(--color-ink-faint);
  letter-spacing: 0.15em;
  margin-top: 0.5rem;
}

/* ============================================
   Tale card title (bilingual)
   ============================================ */
.tale-card .title-zh {
  font-family: var(--font-serif-zh);
  font-weight: 400;
  color: var(--color-ink-soft);
  font-size: 0.9em;
}

/* ============================================
   Original Text (collapsible details/summary)
   ============================================ */
details.original-text {
  margin: 3rem 0 1.5rem;
  padding: 1rem 1.25rem;
  background: var(--color-paper-warm);
  border-left: 3px solid var(--color-accent);
  border-radius: 2px;
}
details.original-text > summary {
  cursor: pointer;
  font-family: var(--font-serif-zh);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-accent);
  list-style: none;
  user-select: none;
  padding: 0.25rem 0;
}
details.original-text > summary::-webkit-details-marker { display: none; }
details.original-text > summary::before {
  content: "▶ ";
  display: inline-block;
  margin-right: 0.5rem;
  transition: transform 0.2s ease;
  font-size: 0.75rem;
}
details.original-text[open] > summary::before {
  transform: rotate(90deg);
}
details.original-text[open] > summary {
  margin-bottom: 0.75rem;
  border-bottom: 1px dashed var(--color-rule);
  padding-bottom: 0.75rem;
}
details.original-text blockquote {
  font-family: var(--font-serif-zh);
  font-size: 1rem;
  line-height: 2;
  color: var(--color-ink);
  background: transparent;
  border-left: none;
  padding: 0.5rem 0;
  margin: 0.5rem 0;
}
details.original-text em {
  display: block;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--color-ink-faint);
  text-align: right;
  font-style: italic;
}

/* ============================================
   Historical Context (collapsible, slate-blue accent)
   ============================================ */
details.historical-context {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: var(--color-paper-warm);
  border-left: 3px solid #4a6b8a;
  border-radius: 2px;
}
details.historical-context > summary {
  cursor: pointer;
  font-family: var(--font-serif-en, var(--font-serif-zh));
  font-weight: 500;
  font-size: 0.95rem;
  color: #4a6b8a;
  list-style: none;
  user-select: none;
  padding: 0.25rem 0;
}
details.historical-context > summary::-webkit-details-marker { display: none; }
details.historical-context > summary::before {
  content: "▶ ";
  display: inline-block;
  margin-right: 0.5rem;
  transition: transform 0.2s ease;
  font-size: 0.75rem;
}
details.historical-context[open] > summary::before {
  transform: rotate(90deg);
}
details.historical-context[open] > summary {
  margin-bottom: 0.75rem;
  border-bottom: 1px dashed var(--color-rule);
  padding-bottom: 0.75rem;
}
details.historical-context h3 {
  font-size: 1.05rem;
  margin: 1.25rem 0 0.5rem;
  color: #2d3e54;
}
details.historical-context p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-ink);
}

/* ============================================
   Mobile
   ============================================ */
@media (max-width: 640px) {
  html { font-size: 16px; }
  .container { padding: 0 1rem; }
  .site-header .container { flex-direction: column; gap: 1rem; }
  .brand-en { font-size: 1.2rem; }
  .hero h1 { font-size: 1.8rem; }
  .post h1 { font-size: 1.8rem; }
  .post blockquote { padding: 1rem; font-size: 0.95rem; }
  .subscribe-form { flex-direction: column; }
}

/* =========================================================
   Ko-fi Tip Jar  (post footer + home subscribe section)
   ========================================================= */
.tip-jar {
  margin: 2.5rem 0 2rem;
  padding: 1.75rem 1.5rem;
  background: #fcf6ec;
  border: 1px solid #ead7b8;
  border-radius: 8px;
  text-align: center;
}

.tip-jar-home {
  margin-top: 2rem;
}

.tip-jar-lead {
  margin: 0 0 1rem;
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.1rem;
  color: #4a3f2a;
  line-height: 1.5;
}

.tip-jar-lead strong {
  color: #2d2820;
}

.kofi-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.4rem;
  background: #29abe0;        /* Ko-fi brand blue */
  color: #fff;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(41, 171, 224, 0.25);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s;
}

.kofi-btn:hover {
  background: #1a8fbe;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(41, 171, 224, 0.35);
  text-decoration: none;
}

.kofi-emoji {
  font-size: 1.15rem;
  line-height: 1;
}

/* =========================================================
   Floating Ko-fi button — bottom right, all pages
   ========================================================= */
.kofi-float {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 999;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1rem 0.6rem 0.8rem;
  background: #29abe0;
  color: #fff;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.15s;
}

.kofi-float:hover {
  background: #1a8fbe;
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
  text-decoration: none;
}

.kofi-float-emoji {
  font-size: 1.1rem;
  line-height: 1;
}

.kofi-float-text {
  letter-spacing: 0.02em;
}

@media (max-width: 600px) {
  .kofi-float {
    right: 0.85rem;
    bottom: 0.85rem;
    padding: 0.55rem 0.9rem 0.55rem 0.7rem;
    font-size: 0.82rem;
  }
}

.subscribe-pending {
  padding: 1rem 1.25rem;
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  margin-top: 0.75rem;
  background: var(--color-paper, #f6efe1);
  color: var(--color-ink);
  font-size: 0.95rem;
  line-height: 1.55;
}
.subscribe-pending a {
  color: var(--color-accent);
  font-weight: 500;
}

/* Footnote hover tooltip (desktop) + native title attr fallback (mobile long-press) */
.footnote-ref {
  position: relative;
  display: inline-block;
}
.footnote-tooltip {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 320px;
  max-width: calc(100vw - 2rem);
  padding: 0.75rem 1rem;
  background: var(--color-ink, #2a2a2a);
  color: var(--color-paper, #f6efe1);
  border-radius: 6px;
  font-size: 0.85rem;
  line-height: 1.55;
  font-weight: normal;
  text-align: left;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
  z-index: 50;
  transition: opacity 0.18s ease, visibility 0.18s ease;
  pointer-events: none;
  vertical-align: baseline;
}
.footnote-tooltip strong { color: var(--color-paper, #f6efe1); }
.footnote-tooltip em { color: var(--color-paper, #f6efe1); }
.footnote-tooltip::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--color-ink, #2a2a2a);
}
.footnote-ref:hover .footnote-tooltip,
.footnote-ref:focus-within .footnote-tooltip {
  visibility: visible;
  opacity: 1;
}
/* On narrow screens, hide CSS popup (rely on browser long-press title attr) */
@media (max-width: 640px) {
  .footnote-tooltip { display: none; }
}