:root{
  --bg:#f6f8fb; --surface:#fff; --surface-alt:#f2f5f9; --text:#1f2933; --muted:#5f6c7b;
  --line:#d8e0ea; --accent:#1f4e79; --accent-dark:#163956; --max:1180px; --radius:16px;
  --shadow:0 14px 36px rgba(20,34,56,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; color:var(--text); background:linear-gradient(180deg,#eef3f7 0%,var(--bg) 180px,var(--bg) 100%);
  font-family:Inter,"Segoe UI",Roboto,Helvetica,Arial,sans-serif; line-height:1.65;
}
a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%; display:block}
.container{width:min(var(--max), calc(100% - 2rem)); margin:0 auto}
.topbar{position:sticky; top:0; z-index:20; backdrop-filter:blur(12px); background:rgba(246,248,251,.94); border-bottom:1px solid rgba(216,224,234,.9)}
.nav{display:flex; justify-content:space-between; align-items:center; gap:1rem; min-height:72px}
.brand{display:flex; flex-direction:column; color:var(--text); font-weight:700; letter-spacing:-.02em}
.brand small{font-weight:500; color:var(--muted)}
.nav-links{display:flex; gap:1.05rem; flex-wrap:wrap; align-items:center}
.nav-links a{color:var(--text); font-weight:500}
.nav-links a.active,.nav-links a:hover{color:var(--accent); text-decoration:none}
.hero{padding:4rem 0 2.2rem}
.hero-grid,.two-col{display:grid; grid-template-columns:1.45fr 1fr; gap:1.4rem}
.card{background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow)}
.hero-copy{padding:2rem}
.hero-side{padding:1.25rem; display:grid; gap:1rem; align-content:start}
.eyebrow{text-transform:uppercase; letter-spacing:.16em; font-size:.76rem; color:var(--accent); font-weight:700; margin-bottom:1rem}
h1,h2,h3{line-height:1.15; letter-spacing:-.03em; margin:0 0 .8rem}
h1{font-size:clamp(2rem,4.5vw,3.6rem)}
h2{font-size:clamp(1.7rem,3vw,2.35rem)}
h3{font-size:1.18rem}
p{margin:0 0 1rem}
.lead{font-size:1.08rem; color:#314150; max-width:70ch}
.meta-list{list-style:none; padding:0; margin:1.15rem 0 1.3rem; display:grid; gap:.55rem}
.meta-list li{color:var(--muted)}
.meta-list strong{color:var(--text)}
.button{display:inline-flex; align-items:center; justify-content:center; min-height:42px; padding:.72rem 1rem; border-radius:999px; border:1px solid var(--accent); background:var(--accent); color:#fff; font-weight:600}
.button.secondary{background:transparent; color:var(--accent)}
.quick-links{display:flex; flex-wrap:wrap; gap:.75rem; margin-top:1.2rem}
.stat-block{background:var(--surface-alt); border:1px solid var(--line); border-radius:14px; padding:1rem}
.stat-block strong{display:block; margin-bottom:.35rem}
.section{padding:1.1rem 0 2rem}
.panel{padding:1.2rem}
.grid-3,.grid-2{display:grid; gap:1rem}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.footer{border-top:1px solid var(--line); padding:1.5rem 0 2.4rem; color:var(--muted)}
.footer-grid{display:flex; justify-content:space-between; flex-wrap:wrap; gap:1rem}
.small{font-size:.94rem}
.notice{padding:1rem 1.15rem; border-radius:14px; background:#f8fafc; border:1px dashed #b7c7d7; color:#435262}
.rich-content{padding:1.4rem 1.6rem}
.rich-content h1{font-size:1.7rem; margin:2rem 0 .85rem; padding-top:.2rem}
.rich-content h1:first-child{margin-top:0}
.rich-content h2{font-size:1.35rem; margin:1.3rem 0 .75rem}
.rich-content h3{font-size:1.08rem; margin:1rem 0 .4rem; color:var(--accent-dark)}
.rich-content p,.rich-content li{font-size:1rem}
.rich-content p{margin-bottom:.9rem}
.rich-content ul{margin:.15rem 0 1rem 1.2rem; padding:0}
.rich-content li{margin:.32rem 0}
.rich-content table{width:100%; border-collapse:separate; border-spacing:1.2rem 0}
.rich-content td{vertical-align:top}
.rich-content img{max-width:210px; border-radius:14px; border:1px solid var(--line); box-shadow:var(--shadow)}
.columns{display:grid; grid-template-columns:1.45fr .9fr; gap:1.3rem}
.sidebar-card{padding:1.15rem}
.list-clean{margin:0; padding-left:1.1rem}
.list-clean li{margin-bottom:.35rem}
.pub-list p{padding:0 0 1rem; margin:0 0 .95rem; border-bottom:1px solid var(--line)}
.pub-list h1{margin-top:1.4rem}
.contact-list p{margin-bottom:.5rem}
@media (max-width: 980px){.hero-grid,.two-col,.columns,.grid-3,.grid-2{grid-template-columns:1fr}}
@media (max-width: 720px){.nav,.nav-links{flex-direction:column; align-items:flex-start}.nav{padding:.8rem 0}.hero{padding-top:2.4rem}.hero-copy,.hero-side,.panel,.rich-content,.sidebar-card{padding:1.1rem}.rich-content table,.rich-content tbody,.rich-content tr,.rich-content td{display:block; width:100%; border-spacing:0}}

.portrait-card{margin:0; padding:1rem; border-radius:14px; background:linear-gradient(180deg,#f8fbfe 0%,#eef3f8 100%); border:1px solid var(--line)}
.portrait-image{width:100%; max-width:340px; margin:0 auto; object-fit:contain; max-height:420px}


/* --- Corrected color palette with accessible contrast --- */
:root{
  --primary:#173b63;
  --primary-2:#24527a;
  --accent:#8b1e3f;
  --accent-soft:#f7e9ee;
  --bg-soft:#f4f7fb;
  --border:#d8e1ec;
  --text:#1d2733;
  --muted:#5c6b7a;
  --card:#ffffff;
  --link:#1c5d99;
  --link-hover:#8b1e3f;
}

body{
  color:var(--text);
  background:linear-gradient(180deg,#eef3f7 0%, #f8fbfd 180px, #f4f7fb 100%);
}

a{
  color:var(--link);
}

a:hover{
  color:var(--link-hover);
}

.topbar{
  background:linear-gradient(180deg, rgba(255,255,255,.96) 0%, rgba(248,251,253,.96) 100%);
  border-bottom:1px solid var(--border);
  box-shadow:0 6px 18px rgba(23,59,99,.06);
}

.brand{
  color:var(--primary);
}

.brand small{
  color:var(--muted);
}

.nav-links a{
  color:var(--primary);
  border-radius:999px;
  padding:.35rem .7rem;
  transition:background-color .2s ease, color .2s ease, transform .2s ease;
}

.nav-links a:hover,
.nav-links a.active{
  background:var(--accent-soft);
  color:var(--accent);
  text-decoration:none;
  transform:translateY(-1px);
}

.hero,
.card,
.panel,
.notice,
.portrait-card{
  background:var(--card);
  border-color:var(--border);
}

.eyebrow{
  color:var(--accent);
}

h1, h2{
  color:var(--primary);
}

h3{
  color:var(--primary-2);
}

h2{
  border-left:5px solid var(--accent);
  padding-left:.65rem;
}

.button,
a.button{
  background:var(--primary);
  color:#fff;
  border:1px solid var(--primary);
  box-shadow:0 8px 18px rgba(23,59,99,.15);
}

.button:hover,
a.button:hover{
  background:var(--accent);
  border-color:var(--accent);
  color:#fff;
  text-decoration:none;
}

.button.secondary{
  background:#fff;
  color:var(--primary);
  border-color:var(--border);
}

.button.secondary:hover{
  background:var(--accent-soft);
  color:var(--accent);
  border-color:#ebcad5;
}

.stat-block{
  background:linear-gradient(180deg,#fbfcfe 0%, #f4f7fb 100%);
  border:1px solid var(--border);
}

.notice{
  background:var(--bg-soft);
  border:1px solid var(--border);
}

.rich-content h3{
  color:var(--primary-2);
}

.pub-list p{
  border-bottom:1px solid var(--border);
}

/* BibTeX and publication utility links */
.publication-links a,
.pub-links a,
li a[href$=".bib"]{
  display:inline-block;
  margin-right:.4rem;
  padding:.16rem .5rem;
  background:var(--accent-soft);
  border:1px solid #ebcad5;
  border-radius:999px;
  color:var(--accent);
  font-size:.92rem;
}

.publication-links a:hover,
.pub-links a:hover,
li a[href$=".bib"]:hover{
  background:var(--accent);
  color:#fff;
  border-color:var(--accent);
  text-decoration:none;
}

.footer{
  background:var(--primary);
  color:#eaf1f8;
  border-top:4px solid var(--accent);
}

.footer a{
  color:#ffffff;
}

.footer a:hover{
  color:#f7d9e3;
}

/* Photo frame */
.portrait-image{
  border:6px solid #fff;
  box-shadow:0 16px 32px rgba(23,59,99,.18);
  background:#fff;
}


/* StatCounter */
.statcounter{
  margin-top: 0.75rem;
  text-align: center;
}
.footer .statcounter img,
.statcounter img{
  max-width: 100%;
  height: auto;
}


/* Book feature */
.book-card{
  display:flex;
  gap:1rem;
  align-items:flex-start;
  margin-top:1rem;
  padding:1rem;
  background:linear-gradient(180deg,#fbfcfe 0%, #f4f7fb 100%);
  border:1px solid #d8e1ec;
  border-radius:16px;
}

.book-card.compact{
  display:block;
}

.book-cover{
  width:120px;
  max-width:100%;
  height:auto;
  border-radius:10px;
  border:4px solid #fff;
  box-shadow:0 10px 24px rgba(23,59,99,.14);
  background:#fff;
}

.book-info h3{
  margin:.1rem 0 .5rem 0;
}

.book-info p{
  margin:.35rem 0;
}

.book-note{
  color:#5c6b7a;
  font-size:.95rem;
}

@media (max-width: 768px){
  .book-card{
    flex-direction:column;
    align-items:center;
    text-align:left;
  }
  .book-cover{
    width:160px;
  }
}


/* Reliable mobile menu */
.menu-button{
  display:none;
  cursor:pointer;
  padding:.55rem .9rem;
  border:1px solid var(--border);
  border-radius:999px;
  background:#fff;
  color:var(--primary);
  font-weight:600;
  box-shadow:0 6px 16px rgba(23,59,99,.08);
  user-select:none;
  -webkit-appearance:none;
  appearance:none;
}

.menu-button::after{
  content:" ☰";
  font-weight:700;
}

@media (max-width: 768px){
  .topbar .container.nav{
    display:flex !important;
    align-items:flex-start;
    justify-content:space-between;
    gap:.75rem;
    flex-wrap:wrap;
  }

  .topbar .container.nav > .brand{
    flex:1 1 auto;
    min-width:0;
  }

  .menu-button{
    display:inline-block !important;
    margin-left:auto;
  }

  .topbar .container.nav > nav.nav-links.responsive-nav{
    display:none !important;
    width:100%;
    order:3;
    flex-direction:column;
    gap:.35rem;
    padding-top:.5rem;
    margin-top:.25rem;
  }

  .topbar .container.nav > nav.nav-links.responsive-nav.menu-open{
    display:flex !important;
  }

  .topbar .container.nav > nav.nav-links.responsive-nav a{
    display:block;
    width:100%;
    text-align:left;
    padding:.55rem .8rem;
    background:#fff;
    border:1px solid var(--border);
    border-radius:12px;
  }
}

@media (min-width: 769px){
  .menu-button{
    display:none !important;
  }

  .topbar .container.nav > nav.nav-links.responsive-nav{
    display:flex !important;
    align-items:center;
    gap:.4rem;
    width:auto;
  }
}



/* Final mobile header fix */
header.topbar .container.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
}

header.topbar .container.nav > a.brand{
  display:flex;
  flex-direction:column;
  text-decoration:none;
}

header.topbar .container.nav > button.menu-button{
  display:none;
}

@media (max-width: 768px){
  header.topbar .container.nav{
    flex-wrap:wrap;
    align-items:flex-start;
  }

  header.topbar .container.nav > button.menu-button{
    display:inline-block !important;
    margin-left:auto;
    margin-top:.15rem;
  }

  /* hide menu by default on phones */
  header.topbar .container.nav > nav,
  header.topbar .container.nav > nav.nav-links,
  header.topbar .container.nav > nav.nav-links.responsive-nav{
    display:none !important;
    width:100%;
    order:3;
    flex-direction:column !important;
    align-items:stretch !important;
    gap:.35rem !important;
    margin-top:.5rem;
    padding-top:.25rem;
  }

  /* show only when JS adds menu-open */
  header.topbar .container.nav > nav.menu-open,
  header.topbar .container.nav > nav.nav-links.menu-open,
  header.topbar .container.nav > nav.nav-links.responsive-nav.menu-open{
    display:flex !important;
  }

  header.topbar .container.nav > nav a,
  header.topbar .container.nav > nav.nav-links a,
  header.topbar .container.nav > nav.nav-links.responsive-nav a{
    display:block !important;
    width:100%;
    box-sizing:border-box;
    padding:.7rem .85rem !important;
    background:#fff;
    border:1px solid var(--border);
    border-radius:12px;
  }
}

@media (min-width: 769px){
  header.topbar .container.nav > button.menu-button{
    display:none !important;
  }

  header.topbar .container.nav > nav,
  header.topbar .container.nav > nav.nav-links,
  header.topbar .container.nav > nav.nav-links.responsive-nav{
    display:flex !important;
    width:auto;
    order:initial;
    flex-direction:row !important;
    align-items:center !important;
  }
}


/* Hard mobile menu fix */
@media (max-width: 768px){
  header.topbar .container.nav > nav#primary-nav{
    display:none !important;
  }
  header.topbar .container.nav > nav#primary-nav.menu-open{
    display:flex !important;
    flex-direction:column !important;
    width:100% !important;
    order:3;
    gap:.35rem !important;
    margin-top:.5rem !important;
  }
  header.topbar .container.nav > nav#primary-nav.menu-open a{
    display:block !important;
    width:100% !important;
    box-sizing:border-box;
    padding:.7rem .85rem !important;
    background:#fff;
    border:1px solid var(--border);
    border-radius:12px;
  }
}
@media (min-width: 769px){
  header.topbar .container.nav > nav#primary-nav{
    display:flex !important;
  }
}