/* Dr. Jacob Chengwei Feng — v2
   Aesthetic: Tang literati / Jingjiao
   Palette: rice paper + sumi ink + cinnabar seal + jade + tea gold
   Type: Noto Serif SC (throughout, handles CJK + English)
*/

:root {
  --paper: #f3e9d2;
  --paper-soft: #ebe0c6;
  --paper-card: #faf3df;
  --paper-deep: #e5d8b6;
  --ink: #1c1813;
  --ink-soft: #3a322a;
  --ink-mute: #6f6557;
  --cinnabar: #9c2a1c;
  --cinnabar-deep: #6e1d13;
  --cinnabar-soft: #c25542;
  --jade: #4f7560;
  --jade-soft: #7b9685;
  --jade-deep: #2f4a3a;
  --gold: #a3852e;
  --gold-soft: #c4a455;
  --rule: #c4b793;
  --rule-soft: #d8cda9;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Noto Serif SC', 'Noto Serif', Georgia, serif;
  font-weight: 400;
  font-size: 17.5px;
  line-height: 1.68;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  /* Subtle xuan-paper texture */
  background-image:
    radial-gradient(circle at 12% 22%, rgba(110, 29, 19, 0.018) 0, transparent 35%),
    radial-gradient(circle at 88% 78%, rgba(79, 117, 96, 0.022) 0, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(163, 133, 46, 0.012) 0, transparent 50%);
}

h1, h2, h3, h4 {
  font-family: 'Noto Serif SC', 'Noto Serif', Georgia, serif;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.005em;
}

a {
  color: var(--cinnabar);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .15s, color .15s;
}
a:hover { border-bottom-color: var(--cinnabar); color: var(--cinnabar-deep); }

p { margin: 0 0 1em; }
.cn { font-family: 'Noto Serif SC', serif; }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}

/* ─── header / nav ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(243, 233, 210, 0.94);
  backdrop-filter: saturate(160%) blur(6px);
  border-bottom: 1px solid var(--rule);
}
.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--ink);
  border: 0;
  font-weight: 500;
  font-size: 18px;
  letter-spacing: 0.02em;
}
.nav-brand .seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--cinnabar);
  color: var(--paper);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0;
  border-radius: 2px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 24px;
  font-size: 14.5px;
  letter-spacing: 0.06em;
}
.nav-links a {
  color: var(--ink-soft);
  border: 0;
}
.nav-links a:hover { color: var(--cinnabar); }
.nav-toggle {
  display: none;
  background: none;
  border: 0;
  font-size: 22px;
  color: var(--ink);
  cursor: pointer;
  padding: 4px 8px;
}
@media (max-width: 820px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    flex-direction: column;
    gap: 0;
    padding: 12px 0;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 32px; }
  .nav-toggle { display: inline-block; }
}

/* ─── hero ─── */
.hero {
  position: relative;
  padding: 88px 0 80px;
  border-bottom: 1px solid var(--rule);
  overflow: hidden;
}
.hero::before {
  /* very faint xuan-paper character watermark */
  content: "景 教";
  position: absolute;
  top: 50%;
  right: -120px;
  transform: translateY(-50%);
  font-family: 'Noto Serif SC', serif;
  font-size: 520px;
  font-weight: 900;
  color: var(--cinnabar);
  opacity: 0.04;
  letter-spacing: 0.2em;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  line-height: 1;
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 48px;
  align-items: center;
}
.hero-vertical {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 28px;
  letter-spacing: 0.4em;
  color: var(--ink-soft);
  font-weight: 400;
  padding: 8px 0;
  border-right: 1px solid var(--rule);
  padding-right: 24px;
  margin-right: 0;
  max-height: 360px;
}
.hero-content { min-width: 0; }
.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.04;
  margin: 0 0 14px;
  font-weight: 500;
  color: var(--ink);
}
.hero h1 .surname { color: var(--cinnabar); }
.hero-name-cn {
  font-size: 22px;
  letter-spacing: 0.3em;
  color: var(--ink-mute);
  margin: 0 0 28px;
  font-weight: 400;
}
.hero-tag {
  font-size: clamp(18px, 1.8vw, 22px);
  line-height: 1.5;
  color: var(--ink-soft);
  font-style: italic;
  margin: 0 0 24px;
  max-width: 620px;
  font-weight: 400;
}
.hero-intro {
  font-size: 16.5px;
  color: var(--ink-soft);
  max-width: 620px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-family: inherit;
  font-size: 15px;
  letter-spacing: 0.1em;
  border: 1px solid var(--cinnabar);
  background: transparent;
  color: var(--cinnabar);
  cursor: pointer;
  transition: background .15s, color .15s;
  border-radius: 0;
  font-weight: 500;
}
.btn:hover { background: var(--cinnabar); color: var(--paper); border-bottom-color: var(--cinnabar); }
.btn-primary { background: var(--cinnabar); color: var(--paper); }
.btn-primary:hover { background: var(--cinnabar-deep); }

.hero-portrait {
  position: relative;
  width: 220px;
}
.hero-portrait .frame {
  width: 220px;
  height: 220px;
  overflow: hidden;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  padding: 6px;
}
.hero-portrait .frame img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  filter: sepia(0.05) saturate(0.92);
}
.hero-portrait .stamp {
  position: absolute;
  bottom: -14px;
  left: -14px;
  width: 64px;
  height: 64px;
  background: var(--cinnabar);
  color: var(--paper);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: 'Noto Serif SC', serif;
  font-size: 22px;
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: 0;
  text-align: center;
  border-radius: 2px;
  transform: rotate(-3deg);
  box-shadow: 0 2px 8px rgba(110, 29, 19, 0.25);
}
.hero-portrait .stamp span { display: block; }

@media (max-width: 940px) {
  .hero { padding: 56px 0 48px; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; justify-items: start; }
  .hero-vertical { display: none; }
  .hero-portrait { width: 160px; order: -1; }
  .hero-portrait .frame { width: 160px; height: 160px; }
  .hero-portrait .stamp { width: 52px; height: 52px; font-size: 18px; }
}

/* ─── section primitives ─── */
section { padding: 88px 0; border-bottom: 1px solid var(--rule); position: relative; }
section:last-of-type { border-bottom: 0; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 12px;
}
.section-numeral {
  font-size: 38px;
  color: var(--cinnabar);
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1;
  border-right: 1px solid var(--rule);
  padding-right: 20px;
  flex-shrink: 0;
}
.section-eyebrow {
  font-size: 13px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold);
}
.section-title {
  font-size: clamp(30px, 3.6vw, 44px);
  line-height: 1.15;
  margin: 0 0 8px;
  font-weight: 500;
}
.section-title-cn {
  font-size: 18px;
  color: var(--ink-mute);
  letter-spacing: 0.24em;
  margin: 0 0 6px;
  font-weight: 400;
}
.section-rule {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 0 0 32px;
}
.section-rule::before {
  content: "";
  width: 60px;
  height: 1px;
  background: var(--cinnabar);
}
.section-rule::after {
  content: "❖";
  color: var(--cinnabar);
  font-size: 12px;
  opacity: 0.6;
}

.section-lede {
  font-size: 19px;
  color: var(--ink-soft);
  max-width: 740px;
  margin: 0 0 36px;
  font-style: italic;
  line-height: 1.55;
}

/* ─── about ─── */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px;
  align-items: start;
}
.bio p { font-size: 17.5px; line-height: 1.72; }
.bio p:first-of-type::first-letter {
  font-family: 'Noto Serif SC', serif;
  font-size: 4em;
  float: left;
  line-height: 0.85;
  padding: 0.08em 0.14em 0 0;
  color: var(--cinnabar);
  font-weight: 500;
}
.about-aside {
  background: var(--paper-card);
  padding: 32px 36px;
  border-top: 3px solid var(--cinnabar);
  position: relative;
}
.about-aside::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--cinnabar-deep);
}
.about-aside h3 {
  font-size: 14px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 4px;
  font-weight: 500;
}
.about-aside h3:not(:first-child) { margin-top: 24px; }
.about-aside .cn-label {
  font-size: 16px;
  color: var(--ink-mute);
  letter-spacing: 0.2em;
  margin-bottom: 14px;
  font-weight: 400;
}
.about-aside ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 15.5px;
  line-height: 1.5;
}
.about-aside li {
  padding: 6px 0;
  border-bottom: 1px dotted var(--rule-soft);
}
.about-aside li:last-child { border-bottom: 0; }
.about-aside .role { color: var(--ink); }
.about-aside .institution {
  color: var(--ink-mute);
  font-style: italic;
  display: block;
  font-size: 14px;
}
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
}

/* ─── books ─── */
.books-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 52px;
}
.book-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 26px;
}
.book-cover {
  width: 180px;
  background: var(--paper-deep);
  padding: 6px;
  border: 1px solid var(--rule);
  display: block;
  border-bottom: 0;
}
.book-cover img { width: 100%; height: auto; display: block; }
.book-card h3 {
  font-size: 23px;
  line-height: 1.22;
  margin: 0 0 6px;
  font-weight: 500;
}
.book-meta {
  font-size: 14px;
  color: var(--ink-mute);
  font-style: italic;
  margin-bottom: 14px;
  line-height: 1.5;
}
.book-card p { font-size: 15.5px; color: var(--ink-soft); line-height: 1.6; }
.book-links { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13.5px; margin-top: 12px; }
.book-links a {
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--cinnabar-soft);
  padding-bottom: 2px;
}
.oa-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  background: var(--cinnabar);
  color: var(--paper);
  padding: 4px 12px;
  margin-bottom: 14px;
  font-weight: 500;
}
.oa-tag::before {
  content: "公開";
  font-size: 12px;
  letter-spacing: 0.1em;
}
@media (max-width: 860px) {
  .books-grid { grid-template-columns: 1fr; gap: 40px; }
  .book-card { grid-template-columns: 140px 1fr; gap: 20px; }
  .book-cover { width: 140px; }
}

/* ─── research areas ─── */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}
.research-card {
  padding: 22px 24px 24px;
  background: var(--paper-card);
  border-top: 2px solid var(--cinnabar);
  transition: transform .15s, box-shadow .15s;
  position: relative;
}
.research-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(28,24,19,0.08);
}
.research-card .num {
  font-family: 'Noto Serif SC', serif;
  color: var(--cinnabar);
  font-size: 24px;
  font-weight: 500;
  display: block;
  margin-bottom: 6px;
  line-height: 1;
}
.research-card h4 {
  font-size: 17px;
  line-height: 1.35;
  margin: 0;
  color: var(--ink);
  font-weight: 500;
}

.qi-feature {
  background: var(--paper-card);
  padding: 40px 44px;
  border-left: 4px solid var(--cinnabar);
  position: relative;
  margin-top: 20px;
}
.qi-feature::before {
  content: "氣";
  position: absolute;
  top: 24px;
  right: 36px;
  font-size: 96px;
  color: var(--cinnabar);
  opacity: 0.1;
  font-weight: 500;
  line-height: 1;
}
.qi-feature .qi-eyebrow {
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 8px;
  text-transform: uppercase;
}
.qi-feature h3 {
  font-size: 26px;
  margin: 0 0 14px;
  color: var(--cinnabar-deep);
  font-weight: 500;
}
.qi-feature p { margin: 0; color: var(--ink-soft); font-size: 16px; line-height: 1.65; max-width: 720px; }

/* ─── articles carousel ─── */
.carousel-wrap {
  position: relative;
  margin: 0 -32px;
}
.carousel {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px 32px 28px;
  scrollbar-width: thin;
  scrollbar-color: var(--gold-soft) transparent;
}
.carousel::-webkit-scrollbar { height: 8px; }
.carousel::-webkit-scrollbar-thumb { background: var(--gold-soft); border-radius: 4px; }
.article-card {
  flex: 0 0 320px;
  scroll-snap-align: start;
  background: var(--paper-card);
  padding: 24px 26px;
  border-top: 1px solid var(--rule);
  position: relative;
  display: flex;
  flex-direction: column;
}
.article-card .journal {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 10px;
  font-weight: 500;
}
.article-card h4 {
  font-size: 16.5px;
  line-height: 1.4;
  margin: 0 0 12px;
  flex: 1;
  font-weight: 500;
}
.article-card .meta {
  font-size: 13.5px;
  color: var(--ink-mute);
  font-style: italic;
  margin-bottom: 12px;
}
.article-card .doi {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--cinnabar-soft);
  padding-bottom: 2px;
  align-self: flex-start;
  color: var(--cinnabar);
}

/* ─── full publications collapsible ─── */
.pubs-toggle {
  display: inline-block;
  margin-top: 28px;
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--rule);
  background: var(--paper-card);
  color: var(--ink-soft);
  font-family: inherit;
  cursor: pointer;
  padding: 10px 22px;
}
.pubs-toggle:hover { background: var(--cinnabar); color: var(--paper); border-color: var(--cinnabar); }
.pubs-full {
  display: none;
  margin-top: 36px;
  background: var(--paper-card);
  padding: 40px 44px;
  border-top: 2px solid var(--cinnabar);
}
.pubs-full.open { display: block; }
.pubs-full h3 {
  font-size: 14px;
  margin: 0 0 16px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 500;
}
.pubs-full h3:not(:first-child) { margin-top: 32px; }
.pubs-full ol {
  padding-left: 26px;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.6;
}
.pubs-full ol li { padding: 7px 0; color: var(--ink-soft); }
.pubs-full em { color: var(--ink); }
.pubs-full a { color: var(--cinnabar); border-bottom: 1px solid var(--rule); }
.pubs-full a:hover { border-bottom-color: var(--cinnabar); }

/* ─── lectures (video grid) ─── */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--paper-card);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  border: 1px solid var(--rule-soft);
  transition: border-color .15s, transform .15s;
}
.video-card:hover { border-color: var(--cinnabar); transform: translateY(-2px); }
.video-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--ink);
  overflow: hidden;
}
.video-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.video-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(0,0,0,0) 28%, rgba(0,0,0,0.35) 70%);
  pointer-events: none;
}
.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 54px;
  height: 54px;
  margin: -27px 0 0 -27px;
  border-radius: 50%;
  background: rgba(243, 233, 210, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .15s, background .15s;
  pointer-events: none;
}
.video-card:hover .play-btn { transform: scale(1.08); background: var(--cinnabar); }
.video-card:hover .play-btn::before { border-left-color: var(--paper); }
.play-btn::before {
  content: "";
  width: 0; height: 0;
  border-style: solid;
  border-width: 9px 0 9px 15px;
  border-color: transparent transparent transparent var(--cinnabar-deep);
  margin-left: 4px;
  transition: border-color .15s;
}
.video-meta { padding: 14px 18px 18px; }
.video-date {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 6px;
  font-weight: 500;
}
.video-title {
  font-size: 15px;
  line-height: 1.4;
  color: var(--ink);
  margin: 0;
  font-weight: 500;
}
.video-venue {
  font-size: 13px;
  color: var(--ink-mute);
  font-style: italic;
  margin-top: 6px;
}

/* ─── conference talks ─── */
.talk-card {
  flex: 0 0 320px;
  scroll-snap-align: start;
  background: var(--paper-card);
  padding: 24px 26px;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
}
.talk-card .date {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 10px;
  font-weight: 500;
}
.talk-card h4 {
  font-size: 16px;
  line-height: 1.4;
  margin: 0 0 12px;
  flex: 1;
  font-weight: 500;
}
.talk-card .venue {
  font-size: 13.5px;
  color: var(--ink-mute);
  font-style: italic;
}

/* ─── teaching ─── */
.teaching-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}
.teaching-block h3 {
  font-size: 14px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 16px;
  font-weight: 500;
}
.teaching-block ul { list-style: none; padding: 0; margin: 0; }
.teaching-block li {
  padding: 13px 0;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 16px;
  line-height: 1.45;
}
.teaching-block li:last-child { border-bottom: 0; }
.teaching-block .inst { display: block; font-size: 13px; color: var(--ink-mute); margin-top: 4px; }
.teaching-flagship {
  grid-column: 1 / -1;
  background: var(--paper-card);
  padding: 30px 36px;
  border-left: 4px solid var(--cinnabar);
  position: relative;
}
.teaching-flagship::before {
  content: "教";
  position: absolute;
  top: 16px;
  right: 28px;
  font-size: 88px;
  color: var(--cinnabar);
  opacity: 0.08;
  font-weight: 500;
  line-height: 1;
}
.teaching-flagship h3 {
  font-size: 24px;
  text-transform: none;
  letter-spacing: 0;
  color: var(--cinnabar-deep);
  font-weight: 500;
  margin: 0 0 12px;
}
.teaching-flagship p { margin: 0; color: var(--ink-soft); font-size: 15.5px; max-width: 720px; }
@media (max-width: 760px) {
  .teaching-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* ─── events ─── */
.events-list { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.event-card {
  background: var(--paper-card);
  padding: 26px 30px;
  border-top: 1px solid var(--rule);
}
.event-card .date {
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 10px;
  font-weight: 500;
}
.event-card h4 {
  font-size: 18px;
  line-height: 1.35;
  margin: 0 0 10px;
  font-weight: 500;
}
.event-card .meta { font-size: 14px; color: var(--ink-mute); font-style: italic; }
.event-card .role {
  font-size: 13px;
  color: var(--cinnabar);
  letter-spacing: 0.12em;
  margin-top: 12px;
  text-transform: uppercase;
}
@media (max-width: 760px) { .events-list { grid-template-columns: 1fr; } }

/* ─── contact / footer ─── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.contact-block h3 {
  font-size: 14px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 16px;
  font-weight: 500;
}
.contact-email {
  font-size: 23px;
  display: block;
  margin-bottom: 10px;
  color: var(--ink);
  border: 0;
  font-weight: 500;
}
.contact-email:hover { color: var(--cinnabar); }
.contact-block ul { list-style: none; padding: 0; margin: 0; }
.contact-block li { padding: 6px 0; font-size: 15px; }
.contact-block li a { color: var(--ink-soft); }
.contact-block li a:hover { color: var(--cinnabar); }
@media (max-width: 760px) { .contact-grid { grid-template-columns: 1fr; gap: 28px; } }

footer.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding: 40px 0;
  font-size: 14px;
}
footer.site-footer a { color: var(--paper); }
footer.site-footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; align-items: center; }
footer.site-footer .copyright { opacity: 0.75; }
footer.site-footer .seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--cinnabar);
  font-size: 16px;
  font-weight: 500;
  border-radius: 2px;
  margin-right: 12px;
}

/* ─── video modal ─── */
.video-modal {
  position: fixed; inset: 0;
  background: rgba(15, 12, 10, 0.94);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 28px;
}
.video-modal.open { display: flex; }
.video-modal-frame {
  width: min(960px, 100%);
  aspect-ratio: 16 / 9;
  background: #000;
  position: relative;
}
.video-modal iframe { width: 100%; height: 100%; border: 0; display: block; }
.video-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: transparent;
  border: 0;
  color: var(--paper);
  font-size: 22px;
  cursor: pointer;
  font-family: inherit;
}

/* ─── version switcher (shared with v1) ─── */
.version-switch {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--ink);
  color: var(--paper);
  padding: 6px;
  display: flex;
  gap: 4px;
  z-index: 200;
  border-radius: 2px;
  box-shadow: 0 6px 24px rgba(0,0,0,0.25);
  font-size: 13px;
  letter-spacing: 0.12em;
  font-family: inherit;
}
.version-switch a {
  display: inline-block;
  padding: 8px 16px;
  color: var(--paper);
  border: 0;
  text-decoration: none;
  background: transparent;
  border-radius: 2px;
  transition: background .15s;
}
.version-switch a:hover { background: rgba(255,255,255,0.12); }
.version-switch a.active {
  background: var(--cinnabar);
  color: var(--paper);
  pointer-events: none;
  cursor: default;
}