/* ============================================================
   Feng-fan Hsieh — academic homepage stylesheet
   Refined scholarly typography; warm paper, deep ink, oxblood.
   ============================================================ */

:root {
  --paper:        #f7f3ec;
  --paper-soft:   #efe9de;
  --ink:          #1a1612;
  --ink-soft:     #4a423a;
  --ink-faint:    #8a7f72;
  --rule:         #d9d0c0;
  --oxblood:      #7a2424;
  --oxblood-deep: #5a1a1a;
  --highlight:    #f0e5cf;

  --serif-display: "Cormorant Garamond", "EB Garamond", Georgia, serif;
  --serif-body:    "Crimson Pro", "Source Serif Pro", Georgia, serif;
  --sans:          "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --measure: 70ch;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif-body);
  font-size: 19px;
  line-height: 1.55;
  font-feature-settings: "kern", "liga", "onum";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Subtle paper grain — pure CSS, no images */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(122, 36, 36, 0.015) 0, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(26, 22, 18, 0.02) 0, transparent 50%);
}

/* ---------- layout ---------- */

.wrap {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
}

@media (max-width: 640px) {
  .wrap { padding: 2rem 1.25rem 4rem; }
  body { font-size: 17px; }
}

/* ---------- header / nav ---------- */

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 1rem;
  padding-bottom: 1.5rem;
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  font-family: var(--serif-display);
  font-size: 1.4rem;
  font-weight: 500;
  font-style: italic;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
}

.wordmark .mono {
  font-style: normal;
  font-weight: 600;
  margin-right: 0.4em;
  color: var(--oxblood);
}

nav.primary {
  font-family: var(--sans);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

nav.primary a {
  color: var(--ink-soft);
  text-decoration: none;
  margin-left: 1.8rem;
  position: relative;
  padding-bottom: 4px;
  transition: color 0.18s ease;
}

nav.primary a:first-child { margin-left: 0; }

nav.primary a:hover { color: var(--oxblood); }

nav.primary a.current {
  color: var(--ink);
}
nav.primary a.current::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: var(--oxblood);
}

@media (max-width: 520px) {
  .site-header { flex-direction: column; align-items: flex-start; }
  nav.primary a { margin-left: 0; margin-right: 1.4rem; }
}

/* ---------- typography ---------- */

h1.page-title {
  font-family: var(--serif-display);
  font-weight: 500;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 0.35em;
}

h1.page-title .romanization {
  display: block;
  font-style: italic;
  font-size: 0.5em;
  color: var(--ink-faint);
  font-weight: 400;
  margin-top: 0.5em;
  letter-spacing: 0.02em;
}

h2 {
  font-family: var(--serif-display);
  font-weight: 500;
  font-size: 1.65rem;
  letter-spacing: 0.005em;
  margin: 3.5rem 0 1.2rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
  position: relative;
}

h2::before {
  content: "§";
  position: absolute;
  left: -1.6rem;
  top: 0.05em;
  color: var(--oxblood);
  font-style: italic;
  font-size: 0.85em;
  opacity: 0.65;
}

@media (max-width: 720px) {
  h2::before { display: none; }
}

h3 {
  font-family: var(--serif-display);
  font-weight: 500;
  font-style: italic;
  font-size: 1.25rem;
  color: var(--oxblood-deep);
  margin: 2.5rem 0 0.8rem;
}

p { margin: 0 0 1rem; }

a {
  color: var(--oxblood);
  text-decoration: none;
  border-bottom: 1px solid rgba(122, 36, 36, 0.25);
  transition: border-color 0.18s ease, color 0.18s ease;
}

a:hover {
  color: var(--oxblood-deep);
  border-bottom-color: var(--oxblood);
}

hr {
  border: 0;
  height: 1px;
  background: var(--rule);
  margin: 3rem 0;
}

/* ---------- lede paragraph (home) ---------- */

.lede {
  font-family: var(--serif-display);
  font-size: 1.35rem;
  line-height: 1.45;
  color: var(--ink-soft);
  font-weight: 400;
  margin: 1.5rem 0 2rem;
  max-width: 60ch;
}

.lede em {
  color: var(--oxblood-deep);
  font-style: italic;
}

/* ---------- intro block (home) ---------- */

.intro-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.6rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin: 0.5rem 0 2rem;
  padding: 0;
  list-style: none;
}

.intro-meta a { border: 0; }

.intro-meta .label {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.7rem;
  color: var(--ink-faint);
  margin-right: 0.4em;
}

.orcid-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
}

.orcid-mark svg {
  width: 14px; height: 14px;
}

/* ---------- publication / talk entries ---------- */

.entry {
  margin: 0 0 1.3rem;
  padding-left: 1.6rem;
  text-indent: -1.6rem;
  line-height: 1.5;
}

.entry strong {
  font-weight: 600;
  color: var(--ink);
}

.entry em { font-style: italic; }

.entry .doi {
  display: block;
  text-indent: 0;
  padding-left: 0;
  margin-top: 0.15rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
}

.entry .doi a {
  color: var(--ink-soft);
  border-bottom: 1px dotted var(--ink-faint);
}

.entry .doi a:hover {
  color: var(--oxblood);
  border-bottom-color: var(--oxblood);
}

/* Numbered talk entries — recast number as a marginalia mark */
.entry.numbered {
  position: relative;
  padding-left: 3rem;
  text-indent: 0;
}

.entry.numbered .num {
  position: absolute;
  left: 0;
  top: 0.1em;
  font-family: var(--serif-display);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--oxblood);
  font-variant-numeric: oldstyle-nums;
  min-width: 2.4rem;
}

@media (max-width: 520px) {
  .entry.numbered { padding-left: 2.2rem; }
  .entry.numbered .num { font-size: 0.85rem; }
}

/* ---------- legend / small notes ---------- */

.legend {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--ink-faint);
  margin-bottom: 1.5rem;
  font-style: normal;
}

.aside-link {
  display: block;
  font-family: var(--sans);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin: 1.5rem 0;
  padding: 0.9rem 1.2rem;
  background: var(--paper-soft);
  border-left: 2px solid var(--oxblood);
  border-radius: 0 2px 2px 0;
}

.aside-link a { border: 0; font-weight: 600; }

/* ---------- banner figure ---------- */

.banner {
  margin: 2.5rem 0 3rem;
}

.banner.tailpiece {
  margin-top: 4.5rem;
}

.banner img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 3px;
  border: 1px solid var(--rule);
  box-shadow: 0 10px 34px rgba(26, 22, 18, 0.2);
}

.banner figcaption {
  margin-top: 0.75rem;
  font-family: var(--sans);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  text-align: center;
}

/* ---------- footer ---------- */

.site-footer {
  margin-top: 5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
}

.site-footer .jp {
  font-family: var(--serif-body);
  font-style: italic;
}

/* ---------- subtle entrance animation ---------- */

@media (prefers-reduced-motion: no-preference) {
  .wrap > * {
    animation: rise 0.7s cubic-bezier(0.2, 0.7, 0.3, 1) backwards;
  }
  .wrap > *:nth-child(1) { animation-delay: 0.05s; }
  .wrap > *:nth-child(2) { animation-delay: 0.12s; }
  .wrap > *:nth-child(3) { animation-delay: 0.19s; }
  .wrap > *:nth-child(4) { animation-delay: 0.26s; }
  .wrap > *:nth-child(5) { animation-delay: 0.33s; }

  @keyframes rise {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
  }
}

/* ---------- print ---------- */

@media print {
  body { background: white; color: black; font-size: 11pt; }
  nav.primary, .site-footer { display: none; }
  a { color: black; border: 0; }
  h2 { page-break-after: avoid; }
  .entry { page-break-inside: avoid; }
}