@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

/* ═══════════════════════════════════════════════════
   CSS DESIGN SYSTEM — Profil Guru Besar
   Academic Premium Dark Theme — v2.0 PROFESSIONAL
   ═══════════════════════════════════════════════════ */

:root {
  --primary: #1e3a5f;
  --primary-light: #2d5a8e;
  --primary-dark: #0f2440;
  --gold: #d4a574;
  --gold-light: #e8c8a0;
  --gold-dark: #b8864e;
  --bg-dark: #0a0f1a;
  --bg-section: #f8f9fc;
  --bg-card: #ffffff;
  --text-main: #1a1a2e;
  --text-muted: #6b7280;
  --text-light: rgba(255,255,255,.85);
  --radius: 16px;
  --shadow: 0 4px 20px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.12);
  --transition: all .3s cubic-bezier(.4,0,.2,1);
  --accent: var(--gold);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; scroll-padding-top:80px; }
body { font-family:'Inter',sans-serif; color:var(--text-main); line-height:1.7; background:#fff; -webkit-font-smoothing:antialiased; }
h1,h2,h3,h4,h5 { font-family:'Playfair Display',serif; font-weight:700; line-height:1.3; }
a { text-decoration:none; color:inherit; }
img { max-width:100%; height:auto; }
.container { max-width:1200px; margin:0 auto; padding:0 24px; }

/* ─── Navbar (Glassmorphism) ───────────────────── */
.navbar {
  position:fixed; top:0; left:0; right:0; z-index:1000;
  padding:16px 0; transition:var(--transition);
  background:transparent;
}
.navbar.scrolled {
  background:rgba(10,15,26,.82); backdrop-filter:blur(20px) saturate(1.6);
  -webkit-backdrop-filter:blur(20px) saturate(1.6);
  padding:10px 0; box-shadow:0 4px 30px rgba(0,0,0,.25);
  border-bottom:1px solid rgba(212,165,116,.08);
}
.navbar .container { display:flex; align-items:center; justify-content:space-between; }
.nav-brand { display:flex; align-items:center; gap:12px; }
.nav-brand-icon {
  width:42px; height:42px; border-radius:10px;
  background:linear-gradient(135deg,var(--gold),var(--gold-dark));
  display:flex; align-items:center; justify-content:center;
  color:#fff; font-size:1rem; font-weight:700;
  box-shadow:0 4px 15px rgba(212,165,116,.3);
}
.nav-brand-text { color:#fff; font-family:'Playfair Display',serif; font-weight:700; font-size:1.1rem; }
.nav-links { display:flex; gap:4px; list-style:none; }
.nav-links a {
  color:rgba(255,255,255,.7); font-size:.8rem; font-weight:500;
  padding:8px 12px; border-radius:8px; transition:var(--transition);
  position:relative;
}
.nav-links a::after {
  content:''; position:absolute; bottom:2px; left:50%; width:0; height:2px;
  background:var(--gold); border-radius:2px; transition:var(--transition);
  transform:translateX(-50%);
}
.nav-links a:hover,.nav-links a.active { color:#fff; }
.nav-links a:hover::after,.nav-links a.active::after { width:60%; }
.nav-toggle { display:none; background:none; border:none; color:#fff; font-size:1.3rem; cursor:pointer; }

/* ─── Hero ────────────────────────────────────── */
.hero {
  min-height:100vh; display:flex; align-items:center;
  background: linear-gradient(160deg, var(--bg-dark) 0%, var(--primary-dark) 40%, var(--primary) 100%);
  position:relative; overflow:hidden;
}
.hero::before {
  content:''; position:absolute; top:0; left:0; right:0; bottom:0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(212,165,116,.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(30,58,95,.15) 0%, transparent 50%);
}
.hero::after {
  content:''; position:absolute; inset:0;
  background:
    linear-gradient(rgba(212,165,116,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212,165,116,.03) 1px, transparent 1px);
  background-size:60px 60px;
}
.hero .container { position:relative; z-index:1; display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; }
.hero-badge {
  display:inline-flex; align-items:center; gap:8px;
  background:rgba(212,165,116,.12); border:1px solid rgba(212,165,116,.2);
  padding:6px 16px; border-radius:50px; font-size:.75rem; color:var(--gold-light);
  font-weight:600; letter-spacing:.5px; text-transform:uppercase; margin-bottom:20px;
  animation:fadeInDown .8s ease-out;
}
.hero-name {
  font-size:3rem; color:#fff; margin-bottom:8px; letter-spacing:-1px;
  animation:fadeInUp .8s ease-out .1s both;
}
.hero-name em { color:var(--gold); font-style:italic; }
.hero-title {
  font-size:1.15rem; color:rgba(255,255,255,.5); font-weight:400;
  font-family:'Inter',sans-serif; margin-bottom:8px;
  animation:fadeInUp .8s ease-out .2s both;
}
.hero-institution {
  font-size:.9rem; color:rgba(255,255,255,.35); margin-bottom:24px;
  animation:fadeInUp .8s ease-out .3s both;
}
.hero-tagline {
  font-size:1rem; color:rgba(255,255,255,.55); line-height:1.7;
  max-width:500px; margin-bottom:32px; font-style:italic;
  border-left:3px solid var(--gold); padding-left:16px;
  animation:fadeInUp .8s ease-out .4s both;
}
.hero-stats {
  display:flex; gap:24px; margin-bottom:32px;
  animation:fadeInUp .8s ease-out .5s both;
}
.hero-stat { text-align:center; }
.hero-stat-num {
  font-family:'Playfair Display',serif; font-size:2.2rem; color:var(--gold); font-weight:800;
  text-shadow:0 0 30px rgba(212,165,116,.2);
}
.hero-stat-label { font-size:.68rem; color:rgba(255,255,255,.4); text-transform:uppercase; letter-spacing:1.5px; margin-top:2px; }
.hero-btns { display:flex; gap:12px; flex-wrap:wrap; animation:fadeInUp .8s ease-out .6s both; }
.btn-gold {
  padding:12px 28px; border-radius:10px; font-weight:600; font-size:.9rem;
  background:linear-gradient(135deg,var(--gold),var(--gold-dark));
  color:#fff; border:none; cursor:pointer; transition:var(--transition);
  display:inline-flex; align-items:center; gap:8px;
  box-shadow:0 4px 20px rgba(212,165,116,.25);
  position:relative; overflow:hidden;
}
.btn-gold::before {
  content:''; position:absolute; top:-50%; left:-60%; width:200%; height:200%;
  background:linear-gradient(45deg,transparent,rgba(255,255,255,.15),transparent);
  transform:rotate(45deg); transition:.6s;
}
.btn-gold:hover::before { left:100%; }
.btn-gold:hover { transform:translateY(-2px); box-shadow:0 8px 35px rgba(212,165,116,.4); }
.btn-outline-white {
  padding:12px 28px; border-radius:10px; font-weight:600; font-size:.9rem;
  background:transparent; color:#fff; border:1px solid rgba(255,255,255,.2);
  cursor:pointer; transition:var(--transition);
  display:inline-flex; align-items:center; gap:8px;
}
.btn-outline-white:hover { background:rgba(255,255,255,.08); border-color:rgba(255,255,255,.4); transform:translateY(-2px); }
.hero-photo {
  display:flex; justify-content:center; align-items:center; position:relative;
  animation:fadeIn 1.2s ease-out .3s both;
}
.hero-photo-frame {
  width:340px; height:420px; border-radius:24px; overflow:hidden;
  border:3px solid rgba(212,165,116,.3);
  box-shadow:0 20px 60px rgba(0,0,0,.4), 0 0 80px rgba(212,165,116,.08);
  position:relative;
  animation:float 6s ease-in-out infinite;
}
.hero-photo-frame img { width:100%; height:100%; object-fit:cover; }
.hero-photo-glow {
  position:absolute; width:420px; height:420px; border-radius:50%;
  background:radial-gradient(circle, rgba(212,165,116,.12) 0%, transparent 70%);
  top:50%; left:50%; transform:translate(-50%,-50%); z-index:-1;
  animation:pulse 4s ease-in-out infinite;
}

@keyframes float { 0%,100% { transform:translateY(0); } 50% { transform:translateY(-12px); } }
@keyframes pulse { 0%,100% { opacity:.7; transform:translate(-50%,-50%) scale(1); } 50% { opacity:1; transform:translate(-50%,-50%) scale(1.05); } }
@keyframes fadeInUp { from { opacity:0; transform:translateY(30px); } to { opacity:1; transform:translateY(0); } }
@keyframes fadeInDown { from { opacity:0; transform:translateY(-30px); } to { opacity:1; transform:translateY(0); } }
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }
@keyframes shimmer { 0% { left:-100%; } 100% { left:100%; } }

/* ─── Section Titles ─────────────────────────── */
.section { padding:100px 0; }
.section-alt { background:var(--bg-section); }
.section-dark { background:linear-gradient(160deg,var(--bg-dark),var(--primary-dark)); color:#fff; }
.section-header { text-align:center; margin-bottom:60px; }
.section-badge {
  display:inline-block; font-size:.7rem; font-weight:700; text-transform:uppercase;
  letter-spacing:2px; color:var(--gold); margin-bottom:12px;
}
.section-title { font-size:2.2rem; margin-bottom:16px; }
.section-desc { font-size:.95rem; color:var(--text-muted); max-width:600px; margin:0 auto; }
.section-dark .section-desc { color:rgba(255,255,255,.5); }

/* ─── About ───────────────────────────────────── */
.about-grid { display:grid; grid-template-columns:1fr 1.2fr; gap:48px; align-items:center; }
.about-image { border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow-lg); position:relative; }
.about-image::after {
  content:''; position:absolute; inset:0; border-radius:var(--radius);
  background:linear-gradient(135deg, rgba(212,165,116,.08), transparent);
  pointer-events:none;
}
.about-image img { width:100%; height:400px; object-fit:cover; transition:var(--transition); }
.about-image:hover img { transform:scale(1.03); }
.about-text { margin-bottom:16px; color:var(--text-muted); font-size:.95rem; }
.about-info-grid { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:24px; }
.about-info-item {
  display:flex; align-items:center; gap:10px;
  padding:12px 16px; background:var(--bg-section); border-radius:10px;
  transition:var(--transition); border:1px solid transparent;
}
.about-info-item:hover { border-color:rgba(212,165,116,.2); transform:translateY(-2px); }
.about-info-item i { color:var(--gold); font-size:.9rem; }
.about-info-item span { font-size:.82rem; color:var(--text-muted); }
.about-info-item strong { display:block; font-size:.85rem; color:var(--text-main); }
.about-links { display:flex; gap:12px; margin-top:24px; }
.about-link {
  display:flex; align-items:center; gap:8px;
  padding:8px 16px; border-radius:8px; font-size:.8rem; font-weight:600;
  background:rgba(30,58,95,.08); color:var(--primary); transition:var(--transition);
}
.about-link:hover { background:var(--primary); color:#fff; transform:translateY(-2px); box-shadow:0 6px 20px rgba(30,58,95,.2); }
.about-link i { font-size:.9rem; }

/* ─── Education Timeline ─────────────────────── */
.timeline { position:relative; padding-left:40px; max-width:800px; margin:0 auto; }
.timeline::before {
  content:''; position:absolute; left:15px; top:0; bottom:0; width:2px;
  background:linear-gradient(180deg, var(--gold), var(--primary-light), var(--gold));
}
.timeline-item { position:relative; margin-bottom:40px; }
.timeline-dot {
  position:absolute; left:-33px; top:6px; width:18px; height:18px;
  border-radius:50%; background:var(--gold);
  border:3px solid #fff; box-shadow:0 2px 8px rgba(212,165,116,.3);
}
.timeline-card {
  background:var(--bg-card); padding:24px; border-radius:var(--radius);
  box-shadow:var(--shadow); border-left:3px solid var(--gold);
  transition:var(--transition); position:relative; overflow:hidden;
}
.timeline-card::before {
  content:''; position:absolute; top:0; right:0; width:100px; height:100%;
  background:linear-gradient(90deg, transparent, rgba(212,165,116,.03));
  pointer-events:none;
}
.timeline-card:hover { transform:translateX(6px); box-shadow:var(--shadow-lg); }
.timeline-year { font-size:.75rem; color:var(--gold-dark); font-weight:700; text-transform:uppercase; letter-spacing:1px; margin-bottom:4px; }
.timeline-degree { font-size:1.1rem; font-weight:700; margin-bottom:4px; }
.timeline-inst { font-size:.88rem; color:var(--primary); font-weight:600; margin-bottom:4px; }
.timeline-field { font-size:.82rem; color:var(--text-muted); }
.timeline-desc { font-size:.82rem; color:var(--text-muted); margin-top:8px; line-height:1.6; }

/* ─── Experience Cards ────────────────────────── */
.exp-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.exp-card {
  background:var(--bg-card); padding:28px; border-radius:var(--radius);
  box-shadow:var(--shadow); transition:var(--transition); border-top:3px solid transparent;
  position:relative; overflow:hidden;
}
.exp-card::after {
  content:''; position:absolute; top:0; left:-100%; width:100%; height:100%;
  background:linear-gradient(90deg, transparent, rgba(212,165,116,.04), transparent);
  transition:.6s;
}
.exp-card:hover::after { left:100%; }
.exp-card:hover { transform:translateY(-6px); box-shadow:var(--shadow-lg); border-top-color:var(--gold); }
.exp-card-year { font-size:.72rem; color:var(--gold-dark); font-weight:700; letter-spacing:1px; text-transform:uppercase; margin-bottom:8px; }
.exp-card-position { font-size:1rem; font-weight:700; margin-bottom:4px; }
.exp-card-inst { font-size:.85rem; color:var(--primary); font-weight:600; margin-bottom:8px; }
.exp-card-desc { font-size:.82rem; color:var(--text-muted); line-height:1.6; }

/* ─── Publications ────────────────────────────── */
.pub-tabs { display:flex; justify-content:center; gap:8px; margin-bottom:40px; flex-wrap:wrap; }
.pub-tab {
  padding:8px 20px; border-radius:50px; font-size:.82rem; font-weight:600;
  background:rgba(255,255,255,.06); color:rgba(255,255,255,.5);
  border:1px solid rgba(255,255,255,.1); cursor:pointer; transition:var(--transition);
}
.pub-tab.active,.pub-tab:hover { background:rgba(212,165,116,.15); color:var(--gold-light); border-color:var(--gold); }
.pub-list { max-width:900px; margin:0 auto; }
.pub-item {
  background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.06);
  border-radius:14px; padding:24px; margin-bottom:16px; transition:var(--transition);
  backdrop-filter:blur(4px); position:relative; overflow:hidden;
}
.pub-item::before {
  content:''; position:absolute; top:0; left:0; width:3px; height:0;
  background:var(--gold); transition:.4s; border-radius:0 0 3px 3px;
}
.pub-item:hover::before { height:100%; }
.pub-item:hover { background:rgba(212,165,116,.06); border-color:rgba(212,165,116,.15); transform:translateX(4px); }
.pub-item[style*="display:none"] { display:none; }
.pub-type-badge {
  display:inline-block; font-size:.65rem; font-weight:700; text-transform:uppercase;
  letter-spacing:1px; padding:3px 10px; border-radius:50px; margin-bottom:8px;
}
.pub-type-jurnal { background:rgba(59,130,246,.2); color:#60a5fa; }
.pub-type-buku { background:rgba(16,185,129,.2); color:#34d399; }
.pub-type-prosiding { background:rgba(245,158,11,.2); color:#fbbf24; }
.pub-type-hki { background:rgba(168,85,247,.2); color:#c084fc; }
.pub-title { font-size:1rem; font-weight:700; color:#fff; margin-bottom:6px; line-height:1.4; }
.pub-journal { font-size:.82rem; color:rgba(255,255,255,.5); margin-bottom:4px; }
.pub-authors { font-size:.78rem; color:rgba(255,255,255,.35); margin-bottom:8px; }
.pub-doi { font-size:.78rem; color:var(--gold); display:inline-flex; align-items:center; gap:4px; }
.pub-doi:hover { text-decoration:underline; }

/* ─── Research ────────────────────────────────── */
.research-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.research-card {
  background:var(--bg-card); padding:28px; border-radius:var(--radius);
  box-shadow:var(--shadow); transition:var(--transition); position:relative;
  border-left:4px solid var(--primary); overflow:hidden;
}
.research-card::after {
  content:''; position:absolute; top:0; right:0; width:80px; height:100%;
  background:linear-gradient(90deg, transparent, rgba(30,58,95,.03));
  pointer-events:none;
}
.research-card:hover { transform:translateY(-6px); box-shadow:var(--shadow-lg); }
.research-year { font-size:.72rem; color:var(--gold-dark); font-weight:700; letter-spacing:1px; margin-bottom:8px; }
.research-title { font-size:1rem; font-weight:700; margin-bottom:8px; }
.research-funder { font-size:.82rem; color:var(--primary); font-weight:600; margin-bottom:4px; }
.research-role { font-size:.78rem; color:var(--text-muted); display:inline-flex; align-items:center; gap:4px; }
.research-desc { font-size:.82rem; color:var(--text-muted); margin-top:8px; line-height:1.6; }

/* Dark section book cards override */
.section-dark .research-card {
  background:rgba(255,255,255,.06); border-left-color:var(--gold);
  backdrop-filter:blur(8px); border:1px solid rgba(255,255,255,.08);
  border-left:4px solid var(--gold);
}
.section-dark .research-card:hover { background:rgba(255,255,255,.1); border-color:rgba(212,165,116,.2); border-left:4px solid var(--gold-light); }
.section-dark .research-title { color:#fff; }
.section-dark .research-funder { color:var(--gold-light); }
.section-dark .research-role { color:rgba(255,255,255,.5); }
.section-dark .research-desc { color:rgba(255,255,255,.4); }
.section-dark .research-year { color:var(--gold); }

/* Book grid 3 columns for dark section */
.section-dark .research-grid { grid-template-columns:repeat(3,1fr); }

/* ─── Teaching ────────────────────────────────── */
.teaching-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.teaching-card {
  background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.08);
  border-radius:14px; padding:24px; transition:var(--transition);
  backdrop-filter:blur(4px); position:relative; overflow:hidden;
}
.teaching-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg, var(--gold), var(--gold-light));
  opacity:0; transition:.3s;
}
.teaching-card:hover::before { opacity:1; }
.teaching-card:hover { background:rgba(212,165,116,.06); border-color:rgba(212,165,116,.15); transform:translateY(-6px); }
.teaching-icon { width:48px; height:48px; border-radius:12px; background:rgba(212,165,116,.12); display:flex; align-items:center; justify-content:center; color:var(--gold); font-size:1.2rem; margin-bottom:14px; }
.teaching-name { font-size:.95rem; font-weight:700; color:#fff; margin-bottom:6px; }
.teaching-meta { font-size:.78rem; color:rgba(255,255,255,.4); margin-bottom:8px; }
.teaching-meta span { display:inline-flex; align-items:center; gap:4px; }
.teaching-desc { font-size:.82rem; color:rgba(255,255,255,.5); line-height:1.6; }

/* ─── Awards ──────────────────────────────────── */
.award-list { max-width:800px; margin:0 auto; }
.award-item {
  display:flex; gap:20px; padding:24px; margin-bottom:16px;
  background:var(--bg-card); border-radius:var(--radius); box-shadow:var(--shadow);
  transition:var(--transition); align-items:flex-start;
  position:relative; overflow:hidden;
}
.award-item::before {
  content:''; position:absolute; bottom:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg, var(--gold), var(--gold-light), var(--gold));
  opacity:0; transition:.3s;
}
.award-item:hover { transform:translateX(6px); box-shadow:var(--shadow-lg); }
.award-item:hover::before { opacity:1; }
.award-icon {
  width:50px; height:50px; border-radius:12px; flex-shrink:0;
  background:linear-gradient(135deg,var(--gold),var(--gold-dark));
  display:flex; align-items:center; justify-content:center;
  color:#fff; font-size:1.2rem; box-shadow:0 4px 15px rgba(212,165,116,.25);
}
.award-content { flex:1; }
.award-year { font-size:.72rem; color:var(--gold-dark); font-weight:700; letter-spacing:1px; margin-bottom:4px; }
.award-title { font-size:1rem; font-weight:700; margin-bottom:4px; }
.award-inst { font-size:.82rem; color:var(--primary); font-weight:600; margin-bottom:4px; }
.award-desc { font-size:.82rem; color:var(--text-muted); }

/* ─── Gallery ─────────────────────────────────── */
.gallery-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }
.gallery-item {
  border-radius:14px; overflow:hidden; position:relative;
  aspect-ratio:4/3; cursor:pointer; box-shadow:var(--shadow);
}
.gallery-item img { width:100%; height:100%; object-fit:cover; transition:transform .5s cubic-bezier(.4,0,.2,1), filter .3s; }
.gallery-item:hover img { transform:scale(1.08); }
.gallery-item-overlay {
  position:absolute; inset:0;
  background:linear-gradient(0deg,rgba(0,0,0,.7) 0%,transparent 60%);
  opacity:0; transition:var(--transition); display:flex; align-items:flex-end; padding:16px;
}
.gallery-item:hover .gallery-item-overlay { opacity:1; }
.gallery-item-title { color:#fff; font-size:.82rem; font-weight:600; }

/* ─── Contact ─────────────────────────────────── */
.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:48px; }
.contact-info-item {
  display:flex; gap:16px; margin-bottom:20px; align-items:flex-start;
}
.contact-info-icon {
  width:48px; height:48px; border-radius:12px; flex-shrink:0;
  background:rgba(30,58,95,.06); display:flex; align-items:center; justify-content:center;
  color:var(--primary); font-size:1rem; transition:var(--transition);
}
.contact-info-item:hover .contact-info-icon { background:var(--gold); color:#fff; transform:scale(1.05); }
.contact-info-text h4 { font-size:.9rem; font-weight:700; margin-bottom:2px; }
.contact-info-text p { font-size:.85rem; color:var(--text-muted); }
.contact-map { border-radius:var(--radius); overflow:hidden; height:200px; margin-top:24px; }
.contact-map iframe { width:100%; height:100%; border:0; }
.contact-form input,.contact-form textarea {
  width:100%; padding:14px 18px; border:2px solid #e5e7eb; border-radius:12px;
  font-size:.9rem; font-family:'Inter',sans-serif; margin-bottom:14px;
  transition:var(--transition); outline:none; background:#fff;
}
.contact-form input:focus,.contact-form textarea:focus { border-color:var(--primary); box-shadow:0 0 0 4px rgba(30,58,95,.08); }
.contact-form textarea { resize:vertical; min-height:120px; }

/* ─── Footer ──────────────────────────────────── */
.footer {
  background:linear-gradient(160deg,var(--bg-dark) 0%,var(--primary-dark) 50%,var(--bg-dark) 100%);
  padding:60px 0 0;
}
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr; gap:48px; margin-bottom:40px; }
.footer-brand h3 { color:#fff; font-size:1.2rem; margin-bottom:8px; }
.footer-brand p { color:rgba(255,255,255,.4); font-size:.85rem; line-height:1.7; }
.footer-heading { color:var(--gold); font-size:.75rem; font-weight:700; text-transform:uppercase; letter-spacing:2px; margin-bottom:16px; font-family:'Inter',sans-serif; }
.footer-links { list-style:none; }
.footer-links li { margin-bottom:8px; }
.footer-links a { color:rgba(255,255,255,.5); font-size:.85rem; transition:var(--transition); }
.footer-links a:hover { color:var(--gold); padding-left:4px; }
.footer-social { display:flex; gap:10px; margin-top:16px; }
.footer-social a {
  width:38px; height:38px; border-radius:10px; display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,.06); color:rgba(255,255,255,.5); font-size:.85rem;
  transition:var(--transition); border:1px solid rgba(255,255,255,.08);
}
.footer-social a:hover { background:var(--gold); color:#fff; border-color:var(--gold); transform:translateY(-3px); }
.footer-bottom {
  border-top:1px solid rgba(255,255,255,.06); padding:20px 0; text-align:center;
  font-size:.85rem; color:rgba(255,255,255,.3);
}
.footer-bottom a { color:var(--gold); }

/* ─── Back to Top ─────────────────────────────── */
.back-to-top {
  position:fixed; bottom:24px; right:24px; width:46px; height:46px;
  border-radius:12px; background:linear-gradient(135deg,var(--gold),var(--gold-dark));
  color:#fff; display:flex; align-items:center; justify-content:center;
  font-size:1rem; cursor:pointer; z-index:999; opacity:0; visibility:hidden;
  transition:var(--transition); box-shadow:0 4px 20px rgba(212,165,116,.3);
  border:none;
}
.back-to-top.show { opacity:1; visibility:visible; }
.back-to-top:hover { transform:translateY(-4px); box-shadow:0 8px 30px rgba(212,165,116,.4); }

/* ─── Preloader ───────────────────────────────── */
.preloader {
  position:fixed; inset:0; background:var(--bg-dark); z-index:9999;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:16px;
  transition:opacity .5s, visibility .5s;
}
.preloader.hide { opacity:0; visibility:hidden; }
.preloader-spinner {
  width:44px; height:44px; border:3px solid rgba(212,165,116,.15);
  border-top:3px solid var(--gold); border-radius:50%; animation:spin .8s linear infinite;
}
@keyframes spin { to { transform:rotate(360deg); } }

/* ─── Theme Toggle Button ─────────────────────── */
.theme-toggle {
  position:fixed; bottom:80px; right:24px; width:46px; height:46px;
  border-radius:12px; border:none; cursor:pointer; z-index:999;
  display:flex; align-items:center; justify-content:center;
  font-size:1.1rem; transition:var(--transition);
  background:linear-gradient(135deg,#1e3a5f,#0f2440);
  color:#fbbf24; box-shadow:0 4px 20px rgba(0,0,0,.25);
}
.theme-toggle:hover { transform:translateY(-4px); box-shadow:0 8px 30px rgba(0,0,0,.35); }
.theme-toggle .fa-sun { display:none; }
.theme-toggle .fa-moon { display:inline; }

/* ─── Light Mode Overrides ────────────────────── */
body.light-mode { background:#f8f9fc; color:var(--text-main); }
body.light-mode .theme-toggle {
  background:linear-gradient(135deg,#fbbf24,#f59e0b);
  color:#1e3a5f; box-shadow:0 4px 20px rgba(251,191,36,.3);
}
body.light-mode .theme-toggle .fa-sun { display:inline; }
body.light-mode .theme-toggle .fa-moon { display:none; }

/* Navbar */
body.light-mode .navbar.scrolled {
  background:rgba(255,255,255,.92); backdrop-filter:blur(20px) saturate(1.6);
  box-shadow:0 2px 20px rgba(0,0,0,.08); border-bottom:1px solid rgba(0,0,0,.06);
}
body.light-mode .navbar.scrolled .nav-brand-text { color:var(--primary-dark); }
body.light-mode .navbar.scrolled .nav-links a { color:var(--text-muted); }
body.light-mode .navbar.scrolled .nav-links a:hover,
body.light-mode .navbar.scrolled .nav-links a.active { color:var(--primary); }
body.light-mode .navbar.scrolled .nav-toggle { color:var(--primary-dark); }

/* Hero — stays dark (intentional, premium feel) */

/* Sections */
body.light-mode .section { background:#fff; }
body.light-mode .section-alt { background:#f1f5f9; }
body.light-mode .section-dark {
  background:linear-gradient(160deg,#f1f5f9 0%,#e2e8f0 50%,#f8fafc 100%);
  color:var(--text-main);
}
body.light-mode .section-desc { color:var(--text-muted); }
body.light-mode .section-dark .section-desc { color:var(--text-muted); }
body.light-mode .section-dark .section-title { color:var(--text-main); }
body.light-mode .section-badge { color:var(--gold-dark); }

/* Cards */
body.light-mode .timeline-card { background:#fff; box-shadow:0 2px 16px rgba(0,0,0,.06); }
body.light-mode .timeline-dot { border-color:#f1f5f9; }
body.light-mode .exp-card { background:#fff; box-shadow:0 2px 16px rgba(0,0,0,.06); }
body.light-mode .research-card { background:#fff; box-shadow:0 2px 16px rgba(0,0,0,.06); }
body.light-mode .section-dark .research-card {
  background:#fff; border:1px solid #e2e8f0; border-left:4px solid var(--gold);
  backdrop-filter:none;
}
body.light-mode .section-dark .research-card:hover {
  background:#f8fafc; border-color:#d1d5db; border-left:4px solid var(--gold-dark);
}
body.light-mode .section-dark .research-title { color:var(--text-main); }
body.light-mode .section-dark .research-funder { color:var(--primary); }
body.light-mode .section-dark .research-role { color:var(--text-muted); }
body.light-mode .section-dark .research-desc { color:var(--text-muted); }
body.light-mode .section-dark .research-year { color:var(--gold-dark); }
body.light-mode .award-item { background:#fff; box-shadow:0 2px 16px rgba(0,0,0,.06); }

/* Publications — dark section overrides */
body.light-mode .pub-tab {
  background:rgba(0,0,0,.04); color:var(--text-muted);
  border-color:rgba(0,0,0,.08);
}
body.light-mode .pub-tab.active,
body.light-mode .pub-tab:hover {
  background:rgba(212,165,116,.12); color:var(--gold-dark);
  border-color:var(--gold);
}
body.light-mode .pub-item {
  background:#fff; border:1px solid #e2e8f0;
  backdrop-filter:none; box-shadow:0 2px 12px rgba(0,0,0,.04);
}
body.light-mode .pub-item:hover { background:#fefce8; border-color:rgba(212,165,116,.3); }
body.light-mode .pub-title { color:var(--text-main); }
body.light-mode .pub-journal { color:var(--text-muted); }
body.light-mode .pub-authors { color:#9ca3af; }

/* Teaching — dark section overrides */
body.light-mode .teaching-card {
  background:#fff; border:1px solid #e2e8f0;
  backdrop-filter:none; box-shadow:0 2px 12px rgba(0,0,0,.04);
}
body.light-mode .teaching-card:hover {
  background:#fefce8; border-color:rgba(212,165,116,.3);
}
body.light-mode .teaching-name { color:var(--text-main); }
body.light-mode .teaching-meta { color:var(--text-muted); }
body.light-mode .teaching-desc { color:var(--text-muted); }

/* Gallery */
body.light-mode .gallery-item { box-shadow:0 2px 16px rgba(0,0,0,.08); }

/* Contact */
body.light-mode .contact-form input,
body.light-mode .contact-form textarea {
  background:#fff; border-color:#e2e8f0; color:var(--text-main);
}

/* Footer — stays dark (intentional, professional look) */

/* Back to top */
body.light-mode .back-to-top { box-shadow:0 4px 20px rgba(212,165,116,.2); }

/* Mobile nav */
body.light-mode .nav-links.open {
  background:rgba(255,255,255,.98); backdrop-filter:blur(20px);
}
body.light-mode .nav-links.open a { color:var(--text-muted); }
body.light-mode .nav-links.open a:hover { color:var(--primary); }

/* Visitor stats footer override */
body.light-mode .vsf-badge { color:var(--gold-light); }

/* Preloader */
body.light-mode .preloader { background:#f8f9fc; }
body.light-mode .preloader-spinner { border-color:rgba(212,165,116,.15); border-top-color:var(--gold-dark); }

/* ─── Light Mode: Stat Counter Cards ──────────── */
body.light-mode .stat-counter-card {
  background:#fff; border:1px solid #e2e8f0;
  box-shadow:0 2px 12px rgba(0,0,0,.04);
}
body.light-mode .stat-counter-card:hover {
  border-color:rgba(212,165,116,.3); background:#fefce8;
}
body.light-mode .stat-counter-num { color:var(--primary-dark); }
body.light-mode .stat-counter-label { color:var(--text-muted); }

/* ─── Light Mode: Section titles with inline style="color:#fff" ── */
body.light-mode .section-dark .section-title { color:var(--text-main) !important; }
body.light-mode .section-dark .section-badge { color:var(--gold-dark); }

/* ─── Light Mode: Publication inline year span ─── */
body.light-mode .pub-item span[style] { color:var(--text-muted) !important; }

/* ─── Light Mode: Supervision Section ─────────── */
body.light-mode .sv-tab {
  background:rgba(0,0,0,.04); color:var(--text-muted);
  border-color:rgba(0,0,0,.08);
}
body.light-mode .sv-tab.active,
body.light-mode .sv-tab:hover {
  background:rgba(212,165,116,.12); color:var(--gold-dark);
  border-color:var(--gold);
}
body.light-mode .sv-item {
  background:#fff; border:1px solid #e2e8f0;
  box-shadow:0 2px 12px rgba(0,0,0,.04);
}
body.light-mode .sv-item:hover {
  background:#fefce8; border-color:rgba(212,165,116,.3);
}
body.light-mode .sv-name { color:var(--text-main); }
body.light-mode .sv-thesis { color:var(--text-muted); }
body.light-mode .sv-meta { color:#6b7280; }
body.light-mode .sv-badge { border:1px solid rgba(0,0,0,.06); }

/* ─── Light Mode: Book Section inline styles ──── */
body.light-mode .section-dark [style*="color:#e8c8a0"],
body.light-mode .section-dark [style*="color:#94a3b8"] {
  color:var(--text-muted) !important;
}
body.light-mode .section-dark [style*="background:rgba(212,165,116"] {
  background:rgba(212,165,116,.08) !important;
  border-color:rgba(212,165,116,.2) !important;
}

/* Book toggle button */
body.light-mode #btnToggleBooks {
  background:rgba(212,165,116,.08) !important;
  color:var(--gold-dark) !important;
  border-color:rgba(212,165,116,.25) !important;
}

/* ─── Light Mode: Book Modal ──────────────────── */
body.light-mode .book-modal-content {
  background:#fff; border:1px solid #e2e8f0;
  box-shadow:0 30px 80px rgba(0,0,0,.15);
}
body.light-mode .book-modal-close {
  background:rgba(0,0,0,.05); border-color:rgba(0,0,0,.1); color:var(--text-main);
}
body.light-mode .book-modal-close:hover { background:rgba(239,68,68,.1); }
body.light-mode .book-modal-cover { background:linear-gradient(160deg,#f1f5f9,#e2e8f0); }
body.light-mode .book-modal-title { color:var(--text-main); }
body.light-mode .book-modal-meta-item { color:var(--text-muted); }
body.light-mode .book-modal-desc { color:var(--text-muted); }
body.light-mode .bm-btn-link {
  background:rgba(212,165,116,.08); color:var(--gold-dark);
  border-color:rgba(212,165,116,.2);
}
body.light-mode .bm-btn-link:hover { color:var(--gold-dark); }

/* ─── Light Mode: PKM Section ─────────────────── */
body.light-mode .pkm-card {
  background:#fff; border:1px solid #e2e8f0;
  box-shadow:0 2px 12px rgba(0,0,0,.04);
}
body.light-mode .pkm-card:hover { box-shadow:0 10px 30px rgba(0,0,0,.1); }

/* ─── Light Mode: Lightbox ────────────────────── */
body.light-mode .lightbox { background:rgba(0,0,0,.85); }

/* ─── Light Mode: Gallery Caption ─────────────── */
body.light-mode .gallery-item-caption { color:#fff; /* stays white on image overlay */ }

/* ─── Responsive ──────────────────────────────── */
@media(max-width:968px) {
  .hero .container { grid-template-columns:1fr; text-align:center; gap:40px; }
  .hero-content { order:2; }
  .hero-photo { order:1; }
  .hero-name { font-size:2.2rem; }
  .hero-stats { justify-content:center; }
  .hero-btns { justify-content:center; }
  .hero-tagline { margin:0 auto 32px; }
  .about-grid { grid-template-columns:1fr; }
  .exp-grid { grid-template-columns:1fr 1fr; }
  .research-grid { grid-template-columns:1fr; }
  .section-dark .research-grid { grid-template-columns:1fr 1fr; }
  .teaching-grid { grid-template-columns:1fr 1fr; }
  .gallery-grid { grid-template-columns:repeat(3,1fr); }
  .contact-grid { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; }
  .section-title { font-size:1.8rem; }
}
@media(max-width:640px) {
  .nav-links { display:none; }
  .nav-toggle { display:block; }
  .nav-links.open {
    display:flex; flex-direction:column; position:absolute;
    top:100%; left:0; right:0; background:rgba(10,15,26,.98);
    padding:16px; gap:4px; backdrop-filter:blur(20px);
  }
  .hero-photo-frame { width:260px; height:320px; }
  .hero-name { font-size:1.8rem; }
  .hero-stats { gap:16px; flex-wrap:wrap; }
  .teaching-grid { grid-template-columns:1fr; }
  .gallery-grid { grid-template-columns:repeat(2,1fr); }
  .about-info-grid { grid-template-columns:1fr; }
  .exp-grid { grid-template-columns:1fr; }
  .research-grid { grid-template-columns:1fr; }
  .section-dark .research-grid { grid-template-columns:1fr; }
  .section { padding:70px 0; }
}