/* ============================================================
   Dr. Sherman Lai — design tokens
   Palette: archive/dossier — parchment paper, deep jade, brass rule,
   a single seal-red used only for the chop-mark signature motif.
   ============================================================ */
:root{
  --ink:        #1B2119;
  --ink-soft:   #3C4238;
  --paper:      #EFE8D6;
  --paper-dim:  #E4DAC2;
  --paper-card: #F7F2E4;
  --jade:       #34503E;
  --jade-deep:  #223529;
  --brass:      #A5813F;
  --brass-line: rgba(165,129,63,0.35);
  --seal:       #9C3327;

  --display: "Fraunces", "Iowan Old Style", ui-serif, serif;
  --body:    "Source Serif 4", "Iowan Old Style", Georgia, serif;
  --sans:    "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, monospace;

  --max: 880px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:18px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

::selection{ background:var(--jade); color:var(--paper); }

a{ color:var(--jade-deep); text-decoration-thickness:1px; text-underline-offset:3px; }
a:hover{ color:var(--seal); }
a:focus-visible, button:focus-visible{ outline:2px solid var(--seal); outline-offset:3px; }

img{ max-width:100%; display:block; }

.wrap{
  max-width:var(--max);
  margin:0 auto;
  padding:0 28px;
}

/* ---------- Nav ---------- */
.site-nav{
  border-bottom:1px solid var(--brass-line);
  background:var(--paper);
  position:sticky; top:0; z-index:10;
}
.site-nav .wrap{
  display:flex; align-items:center; justify-content:space-between;
  padding-top:16px; padding-bottom:16px;
  max-width:1040px;
}
.nav-mark{
  display:flex; align-items:center; gap:12px;
  font-family:var(--mono); font-size:13px; letter-spacing:.08em;
  color:var(--ink); text-decoration:none; text-transform:uppercase;
}
.nav-mark svg{ width:28px; height:28px; }
.nav-links{ display:flex; gap:28px; list-style:none; margin:0; padding:0; }
.nav-links a{
  font-family:var(--sans); font-size:14px; font-weight:600;
  letter-spacing:.02em; color:var(--ink-soft); text-decoration:none;
}
.nav-links a:hover, .nav-links a.active{ color:var(--seal); }

/* ---------- Eyebrow / labels ---------- */
.eyebrow{
  font-family:var(--mono); font-size:12px; letter-spacing:.14em;
  text-transform:uppercase; color:var(--brass);
  display:flex; align-items:center; gap:10px; margin:0 0 14px;
}
.eyebrow::before{ content:""; width:22px; height:1px; background:var(--brass); display:inline-block; }

/* ---------- Hero ---------- */
.hero{
  padding:0 0 0;
  border-bottom:1px solid var(--brass-line);
  overflow:hidden;
  position:relative;
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(52,80,62,0.10), transparent 60%),
    var(--paper);
}
.hero-grid{
  display:grid; grid-template-columns:1.2fr .8fr; gap:0; align-items:stretch;
  max-width:1160px; margin:0 auto;
}
.hero-copy{
  padding:96px 28px 72px 28px;
  display:flex; flex-direction:column; justify-content:center;
}
.hero h1{
  font-family:var(--display); font-optical-sizing:auto;
  font-weight:600; font-size:clamp(2.5rem, 5vw, 3.8rem);
  line-height:1.03; margin:0 0 20px; color:var(--jade-deep);
  letter-spacing:-.01em;
}
.hero .role{
  font-family:var(--sans); font-size:17px; color:var(--ink-soft);
  margin:0 0 32px; max-width:48ch;
}
.hero-cred{
  font-family:var(--mono); font-size:13px; color:var(--ink-soft);
  border-left:2px solid var(--brass); padding-left:16px;
  display:grid; gap:7px; margin-bottom:34px;
}
.hero-cta{ display:flex; gap:14px; flex-wrap:wrap; }
.btn{
  font-family:var(--sans); font-weight:600; font-size:14.5px;
  padding:13px 24px; border-radius:2px; text-decoration:none;
  display:inline-flex; align-items:center; gap:8px;
  transition:transform .15s ease, box-shadow .15s ease;
}
.btn-primary{ background:var(--jade-deep); color:var(--paper-card); }
.btn-primary:hover{ background:var(--seal); color:#fff; transform:translateY(-1px); }
.btn-ghost{ border:1px solid var(--brass); color:var(--ink); }
.btn-ghost:hover{ background:var(--paper-dim); color:var(--seal); border-color:var(--seal); }

.hero-photo{
  position:relative;
  min-height:520px;
  background-size:cover;
  background-position:center 18%;
  border-left:1px solid var(--brass-line);
}
.hero-photo::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(27,33,25,0) 55%, rgba(27,33,25,.55) 100%),
             linear-gradient(90deg, rgba(239,232,214,.16), rgba(239,232,214,0) 18%);
}
.hero-photo .seal-badge{
  position:absolute; right:22px; bottom:22px; z-index:2;
}
.hero-photo .seal-badge svg{ width:92px; height:92px; filter:drop-shadow(0 2px 6px rgba(0,0,0,.25)); }
.hero-photo figcaption{
  position:absolute; left:22px; bottom:20px; z-index:2;
  font-family:var(--mono); font-size:11.5px; letter-spacing:.06em;
  color:var(--paper); text-transform:uppercase;
}

/* ---------- Stats band ---------- */
.stats-band{
  border-bottom:1px solid var(--brass-line);
  background:var(--jade-deep);
}
.stats-grid{
  display:grid; grid-template-columns:repeat(4,1fr);
  max-width:1160px; margin:0 auto; padding:0 28px;
}
.stat{
  padding:34px 20px; text-align:center;
  border-left:1px solid rgba(239,232,214,.15);
}
.stat:first-child{ border-left:none; }
.stat .num{
  font-family:var(--display); font-weight:600; font-size:2.1rem;
  color:var(--paper); display:block; line-height:1;
}
.stat .lbl{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.06em;
  text-transform:uppercase; color:var(--brass); margin-top:8px; display:block;
}

/* ---------- Sections ---------- */
section.block{ padding:64px 0; }
section.block + section.block{ border-top:1px solid var(--brass-line); }
.block h2{
  font-family:var(--display); font-weight:600;
  font-size:clamp(1.6rem,3vw,2.2rem); color:var(--jade-deep); margin:0 0 26px;
}
.lede{ font-size:20px; color:var(--ink-soft); max-width:62ch; }

/* ---------- Credentials list ---------- */
.cred-list{ list-style:none; margin:0; padding:0; display:grid; gap:0; }
.cred-list li{
  display:grid; grid-template-columns:110px 1fr; gap:20px;
  padding:16px 0; border-top:1px solid var(--brass-line);
}
.cred-list li:last-child{ border-bottom:1px solid var(--brass-line); }
.cred-list .yr{ font-family:var(--mono); font-size:13px; color:var(--brass); padding-top:2px; }
.cred-list .desc{ font-family:var(--sans); font-size:15.5px; color:var(--ink); }

/* ---------- Timeline (press) ---------- */
.timeline{ position:relative; margin-left:6px; }
.tl-item{
  position:relative; padding:0 0 48px 34px; border-left:1px solid var(--brass-line);
  display:grid; grid-template-columns:1fr 220px; gap:28px; align-items:start;
}
.tl-item:last-child{ border-left-color:transparent; padding-bottom:0; }
.tl-item::before{
  content:""; position:absolute; left:-6px; top:4px;
  width:11px; height:11px; border-radius:50%;
  background:var(--paper); border:2px solid var(--jade);
}
.tl-date{ font-family:var(--mono); font-size:12.5px; color:var(--brass); letter-spacing:.05em; }
.tl-item h3{
  font-family:var(--display); font-weight:600; font-size:1.25rem;
  margin:6px 0 8px; color:var(--jade-deep);
}
.tl-item p{ margin:0; color:var(--ink-soft); font-size:16px; }
.tl-src{ display:block; margin-top:8px; font-family:var(--sans); font-size:13px; color:var(--brass); }
.tl-photo{
  border:1px solid var(--brass-line); border-radius:2px; overflow:hidden;
  background:var(--paper-dim);
}
.tl-photo img{ width:100%; height:150px; object-fit:cover; display:block; }
.tl-item:not(:has(.tl-photo)){ grid-template-columns:1fr; }

@media (max-width:760px){
  .tl-item{ grid-template-columns:1fr; }
  .tl-photo{ order:-1; max-width:280px; }
  .tl-photo img{ height:170px; }
}

/* ---------- Gallery ---------- */
.gallery{
  display:grid; grid-template-columns:repeat(3,1fr); gap:16px;
}
.gallery figure{ margin:0; }
.gallery .frame{
  border:1px solid var(--brass-line); overflow:hidden; border-radius:2px;
  background:var(--paper-dim);
}
.gallery img{
  width:100%; height:210px; object-fit:cover; display:block;
  transition:transform .5s ease;
}
.gallery figure:hover img{ transform:scale(1.04); }
.gallery figcaption{
  margin-top:9px; font-family:var(--mono); font-size:11.5px;
  color:var(--brass); letter-spacing:.03em;
}

/* ---------- Cards ---------- */
.card-grid{ display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.card{
  background:var(--paper-card); border:1px solid var(--brass-line);
  padding:26px 24px; border-radius:2px;
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover{
  transform:translateY(-3px);
  box-shadow:0 10px 24px rgba(27,33,25,.08);
  border-color:var(--brass);
}
.card h3{
  font-family:var(--display); font-weight:600; font-size:1.15rem;
  margin:0 0 10px; color:var(--jade-deep);
}
.card p{ margin:0; color:var(--ink-soft); font-size:15px; }
.card .tag{
  font-family:var(--mono); font-size:11px; text-transform:uppercase;
  letter-spacing:.08em; color:var(--seal); margin-bottom:10px; display:block;
}

/* ---------- Pull quote ---------- */
blockquote{
  font-family:var(--display); font-style:italic; font-size:1.4rem;
  color:var(--jade-deep); border-left:3px solid var(--seal);
  padding:4px 0 4px 26px; margin:36px 0;
}
blockquote cite{
  display:block; margin-top:10px; font-family:var(--mono);
  font-style:normal; font-size:12.5px; color:var(--ink-soft);
}

/* ---------- Article list ---------- */
.article-row{
  display:flex; justify-content:space-between; gap:24px;
  padding:22px 0; border-top:1px solid var(--brass-line);
  text-decoration:none; color:var(--ink);
}
.article-row:hover .a-title{ color:var(--seal); }
.article-row:last-child{ border-bottom:1px solid var(--brass-line); }
.a-title{ font-family:var(--display); font-size:1.15rem; font-weight:600; color:var(--jade-deep); }
.a-meta{ font-family:var(--mono); font-size:12.5px; color:var(--brass); white-space:nowrap; padding-top:4px; }
.a-excerpt{ font-family:var(--sans); font-size:14.5px; color:var(--ink-soft); margin-top:6px; max-width:60ch; }

/* ---------- Related articles ---------- */
.related{
  margin-top:56px; padding-top:36px; border-top:1px solid var(--brass-line);
}
.related h3{
  font-family:var(--mono); font-size:12px; letter-spacing:.1em; text-transform:uppercase;
  color:var(--brass); margin:0 0 18px; font-weight:500;
}
.related-grid{ display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.related-card{
  display:block; background:var(--paper-card); border:1px solid var(--brass-line);
  padding:16px 18px; border-radius:2px; text-decoration:none;
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.related-card:hover{
  transform:translateY(-2px); box-shadow:0 8px 18px rgba(27,33,25,.07); border-color:var(--brass);
}
.related-card .rc-title{
  font-family:var(--display); font-weight:600; font-size:15.5px; color:var(--jade-deep); display:block;
}
.related-card .rc-tag{
  font-family:var(--mono); font-size:11px; color:var(--brass); text-transform:uppercase;
  letter-spacing:.05em; display:block; margin-bottom:6px;
}
@media (max-width:760px){
  .related-grid{ grid-template-columns:1fr; }
}

/* ---------- Footer ---------- */
footer{
  border-top:1px solid var(--brass-line);
  padding:44px 0 60px;
  font-family:var(--sans); font-size:13.5px; color:var(--ink-soft);
}
footer .wrap{ max-width:1040px; display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px; }
footer .foot-note{
  width:100%; padding-top:18px; margin-top:6px; border-top:1px solid var(--brass-line);
  font-size:12px; color:var(--brass); line-height:1.6;
}

/* ---------- Article page ---------- */
.article-body{ font-size:18.5px; }
.article-body h2{ font-family:var(--display); color:var(--jade-deep); margin-top:2.2em; }
.article-body p{ margin:1.1em 0; }
.article-head{ padding:70px 0 40px; border-bottom:1px solid var(--brass-line); }
.article-head h1{
  font-family:var(--display); font-weight:600; font-size:clamp(2rem,4vw,2.8rem);
  color:var(--jade-deep); margin:16px 0;
}
.disclaimer{
  font-family:var(--sans); font-size:13.5px; color:var(--ink-soft);
  background:var(--paper-dim); border-left:3px solid var(--brass);
  padding:14px 18px; margin:30px 0;
}

/* ---------- FAQ accordion ---------- */
.faq-list{ margin:0; }
.faq-item{
  border-top:1px solid var(--brass-line);
  padding:6px 0;
}
.faq-item:last-child{ border-bottom:1px solid var(--brass-line); }
.faq-item summary{
  font-family:var(--display); font-weight:600; font-size:1.15rem;
  color:var(--jade-deep); padding:16px 34px 16px 0; cursor:pointer;
  list-style:none; position:relative;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{
  content:"+"; position:absolute; right:4px; top:14px;
  font-family:var(--sans); font-size:22px; color:var(--brass);
  transition:transform .2s ease;
}
.faq-item[open] summary::after{ content:"–"; }
.faq-item summary:hover{ color:var(--seal); }
.faq-answer{
  font-family:var(--sans); font-size:16px; color:var(--ink-soft);
  padding:0 34px 22px 0; max-width:68ch;
}

/* ---------- Responsive ---------- */
@media (max-width:760px){
  .hero-grid{ grid-template-columns:1fr; }
  .seal-plate{ justify-self:start; }
  .card-grid{ grid-template-columns:1fr; }
  .cred-list li{ grid-template-columns:80px 1fr; }
  .nav-links{ gap:16px; }
  body{ font-size:17px; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
}