/* ===== Modern Academic Site Styles ===== */
/* Typography, Layout, Dark Mode, Responsive */

:root {
  --bg-primary: #fafafa;
  --bg-secondary: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --accent: #1772d0;
  --accent-hover: #f09228;
  --nav-bg: #1e293b;
  --nav-text: #f8fafc;
  --nav-hover: #334155;
  --border: #e2e8f0;
  --card-bg: #ffffff;
  --badge-new: #dc2626;
  --pub-stats-bg: #f1f5f9;
}

html[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --accent: #60a5fa;
  --accent-hover: #fbbf24;
  --nav-bg: #0f172a;
  --nav-text: #f8fafc;
  --nav-hover: #334155;
  --border: #334155;
  --card-bg: #1e293b;
  --badge-new: #f87171;
  --pub-stats-bg: #334155;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  padding: 8px 16px;
  background: var(--accent);
  color: white;
  text-decoration: none;
  border-radius: 4px;
  z-index: 9999;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 12px;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Lato', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: background 0.3s ease, color 0.3s ease;
}

/* ===== Layout Container ===== */
.site-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}


/* ===== Navbar ===== */
.navbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: var(--nav-bg);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar a {
  color: var(--nav-text);
  padding: 16px 20px;
  text-decoration: none;
  font-size: 15px;
  transition: background 0.2s;
}

.navbar a:hover,
.navbar a:focus {
  background: var(--nav-hover);
  outline: none;
}

.dropdown {
  position: relative;
}

.dropdown .dropbtn {
  font-size: 15px;
  border: none;
  color: var(--nav-text);
  padding: 16px 20px;
  background: transparent;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background 0.2s;
}

.dropdown .dropbtn:hover,
.dropdown .dropbtn:focus {
  background: var(--nav-hover);
  outline: none;
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--card-bg);
  min-width: 140px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  border-radius: 8px;
  overflow: hidden;
  z-index: 1001;
}

.dropdown:hover .dropdown-content,
.dropdown:focus-within .dropdown-content {
  display: block;
}

.dropdown-content a {
  color: var(--text-primary);
  padding: 12px 20px;
  display: block;
  text-align: left;
  border: none;
}

.dropdown-content a:hover {
  background: var(--border);
}

/* ===== Dark Mode Toggle ===== */
.theme-toggle {
  margin-left: auto;
  padding: 10px 16px !important;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 8px;
  color: var(--nav-text);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

.theme-toggle:hover {
  background: var(--nav-hover);
  border-color: rgba(255,255,255,0.5);
}

/* ===== Hero Section ===== */
.hero {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 40px;
  padding: 40px 0 30px;
  flex-wrap: wrap;
}

.hero-content {
  flex: 1;
  min-width: 280px;
}

.hero-image {
  flex-shrink: 0;
  width: 220px;
}

.hero-image img {
  width: 100%;
  border-radius: 50%;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.hero name,
.hero .site-name {
  display: block;
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
}

.hero p {
  text-align: justify;
  margin: 0 0 12px;
  font-size: 15px;
}

/* Publication stats - clean, understated */
.pub-stats {
  display: block;
  margin: 12px 0;
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* Social Links ===== */
.social-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  text-decoration: none;
  font-size: 15px;
  padding: 8px 12px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}

.social-links a:hover,
.social-links a:focus {
  color: var(--accent-hover);
  background: rgba(0,0,0,0.05);
}

html[data-theme="dark"] .social-links a:hover {
  background: rgba(255,255,255,0.08);
}

.social-links .fa, .social-links .fa-brands {
  font-size: 18px;
}

/* ===== Sections ===== */
section {
  padding: 30px 0;
  border-bottom: 1px solid var(--border);
}

section:last-of-type {
  border-bottom: none;
}

heading, .section-heading {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  display: block;
}

/* ===== Recent Updates ===== */
#recent_updates {
  padding: 16px 0 24px;
}

.updates-list {
  list-style: none;
  padding: 0;
  margin: 0;
  line-height: 1.4;
}

.updates-list li {
  padding: 2px 0 2px 16px;
  position: relative;
}

#recent_updates heading {
  margin-bottom: 6px;
}

.updates-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.85em;
}

.badge-new {
  display: inline-block;
  background: var(--badge-new);
  color: white !important;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  margin-right: 8px;
}

/* ===== Publications ===== */
.pub-table {
  width: 100%;
  border-collapse: collapse;
}

.pub-table td {
  padding: 6px 12px !important;
  vertical-align: middle;
}

.pub-table td[style*="width:25%"] {
  padding: 6px 8px !important;
}

.pub-table td[style*="width:100%"] heading {
  margin-bottom: 2px;
}

.pub-table td[style*="width:100%"] p {
  margin: 0 0 2px;
}

.pub-table td[style*="padding:0px"] {
  padding: 4px 12px !important;
}

.pub-table tr {
  transition: background 0.2s;
}

.pub-table .one,
.pub-table .two {
  width: 120px;
  height: 120px;
}

.pub-table br + br {
  display: none;
}

.pub-table div[id$="_abs"],
.pub-table div[id$="_bib"] {
  margin-top: 4px;
  padding-top: 4px;
}

.pub-table p:empty {
  margin: 0;
  padding: 0;
  line-height: 0;
  height: 0;
}

.pub-table tr:hover {
  background: rgba(0,0,0,0.02);
}

html[data-theme="dark"] .pub-table tr:hover {
  background: rgba(255,255,255,0.03);
}

.pub-table tr[bgcolor="#ffffd0"] {
  background: rgba(251, 191, 36, 0.15) !important;
}

html[data-theme="dark"] .pub-table tr[bgcolor="#ffffd0"] {
  background: rgba(251, 191, 36, 0.1) !important;
}

/* ===== Links ===== */
a {
  color: var(--accent);
  text-decoration: none;
}

a:hover, a:focus {
  color: var(--accent-hover);
}

/* Override stylesheet.css for dark mode compatibility */
html[data-theme="dark"] body,
html[data-theme="dark"] td,
html[data-theme="dark"] th,
html[data-theme="dark"] p,
html[data-theme="dark"] .papertitle {
  color: var(--text-primary);
}

html[data-theme="dark"] papertitle {
  color: var(--text-primary);
}

/* ===== Footer ===== */
.site-footer {
  text-align: center;
  padding: 30px 20px;
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    align-items: stretch;
  }

  .navbar a, .dropdown .dropbtn {
    padding: 14px 20px;
    justify-content: center;
  }

  .theme-toggle {
    margin-left: 0;
  }

  .hero {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    order: 2;
  }

  .hero-image {
    order: 1;
    width: 180px;
  }

  .hero name, .hero .site-name {
    text-align: center;
  }

  .hero p {
    text-align: justify;
  }

  .pub-table td:first-child {
    display: none;
  }

  .pub-table td:last-child {
    display: block;
    padding: 16px !important;
  }
}

@media (max-width: 480px) {
  .site-container {
    padding: 0 16px;
  }

  .hero name, .hero .site-name {
    font-size: 24px;
  }

  .social-links {
    flex-direction: column;
    align-items: center;
  }
}

/* ===== Print styles ===== */
@media print {
  .navbar, .theme-toggle, .skip-link, .social-links, a[href*="clustrmaps"] {
    display: none !important;
  }
  body { background: white; color: #000; }
  a { color: #1772d0; }
  .site-container { max-width: 100%; }
}

/* ===== Legacy font tag support ===== */
font[size="3"] { font-size: 15px; }
font[size="2"] { font-size: 13px; }
font[size="3.5"] { font-size: 16px; }
font[size="5"] { font-size: 22px; font-weight: 700; }