/* CNS HKBU – Modern static theme (no build step) */
:root{
  --bg:#ffffff;
  --bg2:#fbfcff;

  /* Surfaces */
  --surface: rgba(15,23,42,.03);
  --surface2: rgba(15,23,42,.05);
  --border: rgba(15,23,42,.10);

  /* Text */
  --text:#0f172a;
  --muted: rgba(15,23,42,.72);
  --muted2: rgba(15,23,42,.55);

  /* Accents */
  --brand:#0ea5e9;     /* sky */
  --brand2:#06b6d4;    /* cyan */
  --brand3:#f97316;    /* orange */
  --ok:#64748b;

  /* Pastel bands */
  --band1: #f7f7f8;
  --band2: #f3fbff;
  --band3: #fff6ef;
  --band4: #f7f7f8;

  --shadow: 0 18px 50px rgba(2,6,23,.10);
  --shadow2: 0 10px 30px rgba(2,6,23,.08);
  --radius: 18px;
  --radius2: 26px;

  --max: 1160px;
  --gutter: 22px;

  --h1: clamp(2.2rem, 2.7vw + 1.2rem, 4rem);
  --h2: clamp(1.6rem, 1.5vw + 1rem, 2.35rem);
  --h3: clamp(1.15rem, .7vw + .9rem, 1.45rem);
  --p: 1rem;
  --lh: 1.65;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth; scroll-padding-top:84px;}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(124,58,237,.10), transparent 60%),
    radial-gradient(900px 500px at 85% 0%, rgba(6,182,212,.10), transparent 60%),
    radial-gradient(1000px 600px at 60% 110%, rgba(249,115,22,.10), transparent 60%),
    linear-gradient(180deg, var(--bg), var(--bg2));
  color: var(--text);
  line-height: var(--lh);
}

a{color: var(--text) !important; text-underline-offset: 4px; text-decoration-color: rgba(15,23,42,.28);}
a:hover{ text-decoration-color: rgba(15,23,42,.45); }

img{max-width:100%; height:auto; display:block;}
button{font: inherit;}
p{margin:0 0 1rem 0; color: var(--muted); font-size: var(--p);}
small{color: var(--muted2);}

.container{
  width: min(var(--max), calc(100% - var(--gutter)*2));
  margin: 0 auto;
}

.skip-link{
  position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{
  left: 16px; top: 14px; width:auto; height:auto; padding:10px 12px;
  background: rgba(0,0,0,.7); border:1px solid var(--border); border-radius: 12px;
  z-index: 9999;
}

/* Header + nav */
.site-header{
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,.78);
  border-bottom: 1px solid rgba(15,23,42,.08);
}
.navbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 14px;
  padding: 14px 0;
}
.brand{
  display:flex; align-items:center; gap:10px;
  text-decoration:none;
}
.brand-mark{
  width: 34px; height: 34px;
  border-radius: 12px;
  background:
    radial-gradient(14px 14px at 20% 30%, rgba(255,255,255,.95), rgba(255,255,255,.0) 60%),
    linear-gradient(135deg, rgba(124,58,237,1), rgba(6,182,212,1));
  box-shadow: 0 10px 26px rgba(2,6,23,.16);
}
.brand span{
  font-weight: 700;
  letter-spacing: .2px;
}
.nav-links{display:flex; align-items:center; gap: 8px;}
.nav-links.mobile{ display:none; }
.nav-links a{color: var(--text) !important; text-underline-offset: 4px; text-decoration-color: rgba(15,23,42,.28);}
.nav-links a:hover{ background: rgba(15,23,42,.04); }
.nav-links a.active{ background: rgba(15,23,42,.05); border: 1px solid rgba(15,23,42,.10); }

.nav-cta{color: var(--text) !important; text-underline-offset: 4px; text-decoration-color: rgba(15,23,42,.28);}
.icon-btn{
  display:inline-flex; align-items:center; justify-content:center;
  width: 42px; height: 42px;
  border-radius: 14px;
  background: rgba(15,23,42,.04);
  border: 1px solid rgba(15,23,42,.10);
  color: rgba(15,23,42,.86);
  cursor:pointer;
}
.icon-btn:hover{background: rgba(15,23,42,.06);}
.nav-toggle{
  display:none;
}

.progress{height:2px;background: rgba(15,23,42,.08);}
.progress > div{
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--brand), var(--brand2), var(--brand3));
}

/* Hero */
.hero{
  position: relative;
  overflow:hidden;
  border-bottom: 1px solid rgba(15,23,42,.08);
}
.hero .container{
  padding: 56px 0 34px 0;
}
.hero-bg{
  position:absolute; inset:-20px;
  background:
    radial-gradient(650px 260px at 12% 20%, rgba(15,23,42,.08), transparent 60%),
    radial-gradient(600px 260px at 90% 25%, rgba(6,182,212,.26), transparent 60%),
    radial-gradient(600px 260px at 70% 90%, rgba(249,115,22,.16), transparent 60%),
    url("/img/top.png");
  background-size: cover;
  background-position: center;
  filter: saturate(1.05) contrast(1.03);
  opacity: .22;
  transform: scale(1.04);
}
.hero-overlay{
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(255,255,255,.62), rgba(255,255,255,.88));
}
.hero-content{
  position: relative;
  display:flex;
  flex-direction:column;
  gap: 16px;
}
.kicker{
  display:inline-flex;
  gap: 10px;
  align-items:center;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.72);
  border: 1px solid rgba(15,23,42,.10);
  color: rgba(15,23,42,.86);
  font-size: .92rem;
}
.kicker-dot{
  width: 10px; height: 10px; border-radius: 99px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
}
h1{
  margin:0;
  font-size: var(--h1);
  line-height: 1.05;
  letter-spacing: -.02em;
}
.hero p{
  max-width: 70ch;
  font-size: 1.05rem;
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;}

/* Sections */
.section{
  padding: 42px 0;
}
.section-title{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap: 18px;
  margin-bottom: 18px;
}
.section-title h2{
  margin:0;
  font-size: var(--h2);
  letter-spacing: -.01em;
}
.section-title p{
  margin:0;
  color: var(--muted2);
  max-width: 62ch;
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  text-decoration:none;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color: rgba(233,238,252,.95);
  box-shadow: 0 10px 26px rgba(0,0,0,.15);
}
.btn:hover{ background: rgba(15,23,42,.06); }
.btn.primary{
  background: linear-gradient(135deg, rgba(124,58,237,1), rgba(6,182,212,1));
  border-color: rgba(255,255,255,.18);
}
.btn.primary:hover{
  filter: brightness(1.03);
}
.btn.ghost{
  background: transparent;
}
.btn small{color: rgba(255,255,255,.85); font-weight:600}

/* Grids / cards */
.grid{
  display:grid;
  gap: 14px;
}
.grid.cols-3{ grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid.cols-4{ grid-template-columns: repeat(4, minmax(0,1fr)); }
.grid.cols-2{ grid-template-columns: repeat(2, minmax(0,1fr)); }

.card{
  border-radius: var(--radius);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(15,23,42,.10);
  overflow:hidden;
  box-shadow: 0 10px 34px rgba(0,0,0,.18);
}
.card.pad{ padding: 18px; }
.card.soft{
  background: rgba(255,255,255,.045);
}
.card:hover{
  border-color: rgba(255,255,255,.18);
  transform: translateY(-1px);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.card h3{
  margin: 0 0 8px 0;
  font-size: var(--h3);
}
.card p{ margin: 0; }

.tile{
  position: relative;
  padding: 20px;
  border-radius: 0;
  background: var(--tile-bg, var(--surface));
  border: 0;
  overflow:hidden;
  min-height: 118px;
  box-shadow: inset 0 0 0 1px rgba(15,23,42,.06);
}
.tile:before{
  content:"";
  position:absolute; inset:-2px;
  background: var(--tile-glow, radial-gradient(500px 220px at 30% 10%, rgba(124,58,237,.14), transparent 60%));
  opacity: .9;
  filter: blur(10px);
}
.tile > *{ position: relative; }
.tile h3{ margin: 0 0 6px 0; }
.tile p{ margin:0; color: var(--muted); }

.bento{
  display:grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-radius: var(--radius2);
  overflow:hidden;
  box-shadow: var(--shadow2);
}
.bento-right{
  display:grid;
  gap: 0;
}

/* Person cards */
.person{
  display:flex;
  gap: 14px;
  align-items:center;
}
.avatar{
  width: 68px; height: 68px;
  border-radius: 18px;
  overflow:hidden;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  flex: 0 0 auto;
}
.person .meta{color: var(--text) !important; text-underline-offset: 4px; text-decoration-color: rgba(15,23,42,.28);}
.person .name{
  font-weight: 700;
  color: rgba(233,238,252,.98);
}
.person .role{
  color: rgba(233,238,252,.65);
  font-size: .95rem;
}

/* Pills / chips */
.pills{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
}
.pill{
  display:inline-flex;
  align-items:center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color: rgba(233,238,252,.88);
  text-decoration:none;
  font-size: .95rem;
}
.pill:hover{ background: rgba(255,255,255,.10); }

/* Details accordion */
details{
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  border-radius: var(--radius);
  overflow:hidden;
}
details + details{ margin-top: 12px; }
summary{
  list-style:none;
  cursor:pointer;
  padding: 14px 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 16px;
  color: rgba(233,238,252,.95);
}
summary::-webkit-details-marker{ display:none; }
.summary-left{
  display:flex; align-items:center; gap: 10px;
}
.badge{
  display:inline-flex;
  align-items:center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  color: rgba(15,23,42,.86);
  font-size: .9rem;
}
.chev{
  width: 18px; height: 18px;
  opacity: .8;
  transition: transform .2s ease;
}
details[open] .chev{ transform: rotate(90deg); }
.details-body{
  padding: 0 16px 16px 16px;
}

/* Publication list */
.pub-controls{
  display:flex;
  gap: 12px;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  margin: 10px 0 16px 0;
}
.search{
  flex: 1 1 340px;
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.18);
}
.search input{
  flex:1;
  background: transparent;
  border: 0;
  outline: none;
  color: rgba(233,238,252,.95);
  font-size: 1rem;
}
.search .hint{ color: rgba(233,238,252,.55); font-size: .92rem; }
.pub-actions{
  display:flex;
  gap: 10px;
  flex-wrap:wrap;
}
.pub-list{
  margin: 0;
  padding: 0;
  list-style:none;
  display:flex;
  flex-direction:column;
  gap: 10px;
}
.pub-item{
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(15,23,42,.10);
  background: rgba(15,23,42,.02);
  display:flex;
  gap: 10px;
  align-items:flex-start;
  justify-content:space-between;
}

.pub-item .pub-text{
  min-width: 0;
  color: var(--text) !important;
}

.pub-item .pub-text b{ color: var(--text) !important; font-weight: 700; }
.pub-item .pub-text a{ color: #0b3a8a !important; font-weight: 700; text-underline-offset: 4px; text-decoration-color: rgba(11,58,138,.35); }
.pub-item .pub-text a:hover{ text-decoration-color: rgba(11,58,138,.65); }
.pub-item .pub-tools{
  display:flex;
  gap: 8px;
  flex: 0 0 auto;
}
.tool{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  cursor:pointer;
  color: rgba(15,23,42,.86);
  font-size: .92rem;
}
.tool:hover{ background: rgba(255,255,255,.10); }

/* Rich text blocks extracted from legacy pages */
.prose{
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(15,23,42,.10);
  border-radius: var(--radius);
  padding: 18px;
}
.prose h3{ margin-top: 10px; }
.prose p{ color: rgba(233,238,252,.74); }
.prose a{color: var(--text) !important; text-underline-offset: 4px; text-decoration-color: rgba(15,23,42,.28);}

/* Gallery */
.gallery-grid{
  display:grid;
  grid-template-columns: repeat(12, minmax(0,1fr));
  gap: 12px;
}
.g-item{
  border: 0;
  padding: 0;
  background: transparent;
  cursor:pointer;
  grid-column: span 6;
}
.g-card{
  border-radius: var(--radius2);
  overflow:hidden;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  box-shadow: 0 14px 46px rgba(0,0,0,.22);
}
.g-card img{
  width:100%;
  height: 240px;
  object-fit: cover;
  filter: saturate(1.03) contrast(1.02);
}
.g-cap{
  padding: 12px 14px;
  color: rgba(233,238,252,.78);
  font-size: .95rem;
}

.modal{
  position: fixed;
  inset:0;
  display:none;
  align-items:center;
  justify-content:center;
  background: rgba(0,0,0,.68);
  z-index: 2000;
}
.modal.open{ display:flex; }
.modal-panel{
  width: min(980px, calc(100% - 26px));
  border-radius: 22px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(11,15,26,.92);
  box-shadow: var(--shadow);
  overflow:hidden;
}
.modal-img{
  width:100%;
  height: min(68vh, 560px);
  object-fit: contain;
  background: rgba(0,0,0,.25);
}
.modal-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
  padding: 12px 14px;
}
.modal-cap{ color: rgba(233,238,252,.78); font-size: .98rem; }
.modal-actions{ display:flex; gap: 10px; }
.kbd{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: .86rem;
  color: rgba(233,238,252,.65);
}

/* Footer */
.site-footer{
  border-top: 1px solid rgba(15,23,42,.08);
  padding: 40px 0;
  margin-top: 0;
  background: var(--band1);
}

.footer-grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 20px;
  align-items:start;
}
.footer-title{margin:0 0 10px 0; font-size: 1.1rem;}
.footer-meta p{margin: 0 0 8px 0;}
.footer-links{display:flex;flex-direction:row;gap:14px;flex-wrap:wrap;align-items:center;justify-content:flex-end;margin-top:14px;text-align:right;}

.footer-links a{color: var(--text) !important; text-underline-offset: 4px; text-decoration-color: rgba(15,23,42,.28);}
.footer-links a:hover{ background: rgba(255,255,255,.10); }

/* Reveal animation */
.reveal{
  opacity: 0;
  transform: translateY(12px) scale(.99);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.in{
  opacity:1;
  transform: none;
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1; transform:none; transition:none;}
  .card:hover{transform:none;}
  details[open] .chev{transform:none;}
}

/* Responsive */
@media (max-width: 980px){
  .grid.cols-4{ grid-template-columns: repeat(2, minmax(0,1fr)); }
  .grid.cols-3{ grid-template-columns: repeat(2, minmax(0,1fr)); }
  .bento{ grid-template-columns: 1fr; }
  .hero .container{ padding: 46px 0 26px 0;}
  .footer-grid{ grid-template-columns: 1fr; }
  .g-item{ grid-column: span 12; }
}
@media (max-width: 720px){
  :root{ --gutter: 16px; }
  .nav-links.desktop{ display:none; }
  .nav-links.mobile{ display:none; }
  .nav-toggle{ display:inline-flex; }
  .site-header.open .nav-links.mobile{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap: 6px;
    padding: 10px 0 14px 0;
  }
  .navbar{ align-items:flex-start; }
  .hero p{ font-size: 1rem; }
  .grid.cols-2{ grid-template-columns: 1fr; }
}
/* Full-bleed pastel bands */
.band{ padding: 46px 0; }
.band.a{color: var(--text) !important; text-underline-offset: 4px; text-decoration-color: rgba(15,23,42,.28);}
.band.b{ background: var(--band2); }
.band.c{ background: var(--band3); }
.band.d{ background: var(--band4); }
.band + .band{ border-top: 1px solid rgba(15,23,42,.06); }


/* Enforce black text for readability */
body { color: #111 !important; background: #ffffff !important; }
h1, h2, h3, h4, h5, h6, p, li, span, a { color: #111 !important; }
a:focus-visible{ outline: 2px solid rgba(15,23,42,.35); outline-offset: 3px; border-radius: 8px; }

.hero .kicker, .hero h1, .hero p{ color: var(--text) !important; }

.avatar img{ width:100%; height:100%; object-fit:cover; display:block; }


/* Wordmark logo and header alignment */
.brand-mark{display:none !important;}
.brand{display:flex;align-items:center;gap:10px;}
.wordmark{height:20px;width:auto;display:block;}
.nav-links.desktop{margin-left:auto;}
.navbar{gap:18px;}

.pub-selected{margin:10px 0 0 0; padding-left:18px;}
.pub-selected li{margin:8px 0; line-height:1.45;}

@media (max-width: 760px){.footer-grid{grid-template-columns:1fr;}.footer-links{justify-content:flex-start;text-align:left;}}


/* Publication code/link readability */
code, pre{color: var(--text) !important;}
code a{color: var(--text) !important; font-weight: 700; text-decoration-color: rgba(15,23,42,.35);} 
.pub code a{color: var(--text) !important; font-weight:700;}


/* Make hero background more visible */
.hero-overlay{background: linear-gradient(180deg, rgba(255,255,255,.62), rgba(255,255,255,.88)) !important;}

/* People cards: force name/role strong */
.person .meta .name{color:#111 !important; font-weight:700 !important;}
.person .meta .role{color:#111 !important; font-weight:700 !important;}

/* Gallery grid: stable aspect ratios */
.gallery-grid figure{margin:0;}
.gallery-grid .thumb{aspect-ratio: 4 / 3; width:100%; overflow:hidden; border-radius: 16px; background: rgba(15,23,42,.03);}
.gallery-grid .thumb img{width:100%; height:100%; object-fit:cover; display:block;}
@media (max-width: 780px){
  .gallery-grid .thumb{aspect-ratio: 1 / 1;}
}