:root {
  --bg: #0b1220;
  --panel: rgba(255,255,255,0.06);
  --text: #e6edf7;
  --muted: #9aa5b1;
  --brand: #7c4dff;
  --accent: #22d3ee;
  --border: rgba(255,255,255,0.16);
  --shadow: 0 20px 50px rgba(0,0,0,0.45);
}

* { box-sizing: border-box; }
html { 
  scroll-behavior: smooth;
  font-size: clamp(14px, 2.5vw, 16px);
  overflow-x: hidden; /* Prevent horizontal scroll on document */
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(800px 400px at 50% -10%, rgba(124,77,255,0.15), transparent 60%),
    var(--bg);
  line-height: 1.6;
  padding: 80px 0 0 0; /* Offset for fixed navbar */
  width: 100%;
  overflow-x: hidden; /* Prevent horizontal scroll on body */
  position: relative;
}

/* Global image constraint */
img, svg, video {
  max-width: 100%;
  height: auto;
}

/* Enhanced backgrounds for larger screens */
@media (min-width: 768px) {
  body {
    background:
      radial-gradient(1200px 600px at 15% -10%, rgba(124,77,255,0.18), transparent 60%),
      radial-gradient(900px 500px at 110% -10%, rgba(34,211,238,0.18), transparent 60%),
      radial-gradient(800px 500px at -10% 120%, rgba(34,197,94,0.12), transparent 60%),
      var(--bg);
  }
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent);
  color: #111;
  padding: 8px;
  z-index: 100;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 0;
}

/* ========== NEWS SECTION ========== */
.news-section {
  padding: 1.5rem 0;
  margin-bottom: 2rem;
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.news-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
}

.news-container h3 {
  margin: 0 0 1rem 0;
  font-size: 1.25rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.news-container h3::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 1.25rem;
  background: var(--accent);
  border-radius: 2px;
}

.news-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.news-item {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
  display: flex;
  flex-direction: column;
  padding: 0.5rem 0.5rem;
  border-radius: 6px;
  transition: background 0.2s ease;
}

.news-item:hover {
  background: rgba(255, 255, 255, 0.03);
}

@media (min-width: 600px) {
  .news-item {
    flex-direction: row;
    align-items: baseline;
  }
}

.news-date {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
  margin-right: 1.2rem;
  flex-shrink: 0;
  font-feature-settings: "tnum";
}

.news-text {
  color: rgba(230, 237, 247, 0.95);
}

.news-text a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.news-text a:hover {
  color: var(--accent);
  text-decoration-color: transparent;
}
.skip-link {
  position: absolute; 
  left: -999px; 
  top: auto; 
  width: 1px; 
  height: 1px; 
  overflow: hidden;
}
.skip-link:focus { 
  position: static; 
  width: auto; 
  height: auto; 
  padding: .5rem 1rem; 
  background: var(--panel); 
  border-radius: 8px; 
}

/* ========== NAVBAR - Mobile First ========== */
.navbar { 
  position: fixed; 
  top: 0; 
  left: 0;
  width: 100%;
  z-index: 50; 
  background: rgba(17,24,39,0.95);
  border-bottom: 1px solid var(--border); 
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

@media (min-width: 768px) {
  .navbar {
    backdrop-filter: saturate(160%) blur(12px);
    background: rgba(17,24,39,0.6);
    box-shadow: 0 10px 40px rgba(0,0,0,0.35);
  }
}

.nav-container { 
  max-width: 1100px; 
  margin: 0 auto; 
  padding: .75rem 1rem; 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  gap: .75rem; 
}

.nav-logo h2 { 
  margin: 0; 
  font-weight: 800; 
  letter-spacing: .4px; 
  color: var(--accent); 
  font-size: 1.1rem; 
}

/* Mobile menu hidden by default */
.nav-menu { 
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  background: rgba(15,22,51,0.98);
  border-bottom: 1px solid var(--border);
  padding: 1rem;
  flex-direction: column;
  gap: .5rem;
  list-style: none;
  margin: 0;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  backdrop-filter: blur(12px);
}

.nav-menu.open { 
  display: flex; 
}

/* Tablet and up: horizontal menu */
@media (min-width: 768px) {
  .nav-menu { 
    display: flex; 
    position: static;
    flex-direction: row;
    background: transparent;
    border: none;
    padding: 0;
    box-shadow: none;
    gap: .5rem;
  }
}

.nav-link { 
  position: relative; 
  color: var(--muted); 
  text-decoration: none; 
  padding: .75rem 1rem;
  border-radius: 10px; 
  font-size: 1rem;
  display: block;
  text-align: center;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (min-width: 768px) {
  .nav-link {
    padding: .45rem .6rem;
    font-size: .95rem;
    min-height: auto;
  }

  .nav-link::after { 
    content: ""; 
    position: absolute; 
    left: .6rem; 
    right: .6rem; 
    bottom: .3rem; 
    height: 2px; 
    background: linear-gradient(90deg, var(--brand), var(--accent)); 
    transform: scaleX(0); 
    transform-origin: left; 
    transition: transform .25s ease; 
    border-radius: 2px; 
  }

  .nav-link:hover::after { 
    transform: scaleX(1); 
  }
}

.nav-link:hover { 
  color: var(--text); 
  background: rgba(255,255,255,0.06); 
}

.nav-actions { 
  display: flex; 
  align-items: center; 
  gap: .4rem; 
}

.hamburger { 
  display: inline-block;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid var(--border); 
  border-radius: 8px; 
  cursor: pointer; 
  background: rgba(255,255,255,0.06);
  touch-action: manipulation;
}

@media (min-width: 768px) {
  .hamburger { 
    display: none; 
  }
}

.hamburger span { 
  display: block; 
  height: 2px; 
  background: #93a2b7; 
  margin: 4px 0; 
  border-radius: 2px; 
  transition: transform .2s ease;
}

.theme-toggle { 
  display: none; 
}

/* ========== HERO - Mobile First ========== */
.hero { 
  padding: 1.5rem 1rem 2rem; 
  position: relative; 
}

.hero::before { 
  content: ""; 
  position: absolute; 
  inset: 0; 
  pointer-events: none; 
  background: radial-gradient(800px 200px at 50% -10%, rgba(124,77,255,0.12), transparent 60%); 
}

@media (min-width: 768px) {
  .hero::before {
    background: radial-gradient(1200px 300px at 50% -10%, rgba(124,77,255,0.12), transparent 60%);
  }
}

.hero-container { 
  max-width: 1100px; 
  margin: 0 auto; 
  display: grid; 
  grid-template-columns: 1fr;
  gap: 2rem; 
  align-items: center; 
  min-width: 0; /* Prevent grid blowout */
}

@media (min-width: 768px) {
  .hero-container {
    grid-template-columns: 1.3fr 1fr;
    gap: 1.5rem;
  }
}

.hero-content { 
  display: grid; 
  gap: .75rem;
  order: 2;
}

@media (min-width: 768px) {
  .hero-content {
    order: 1;
    gap: .5rem;
  }
}

.hero-title { 
  font-size: clamp(1.75rem, 5vw, 2.5rem); 
  margin: 0; 
  line-height: 1.15; 
}

@media (min-width: 768px) {
  .hero-title {
    font-size: clamp(1.4rem, 2vw + .8rem, 2rem);
  }
}

.hero-subtitle { 
  color: var(--muted); 
  margin: 0; 
  font-size: 1.1rem; 
  letter-spacing: .2px; 
}

.hero-description { 
  color: var(--text); 
  margin: .5rem 0 0; 
  font-size: 1rem;
}

.hero-buttons { 
  display: flex; 
  gap: .75rem; 
  margin-top: .75rem; 
  flex-wrap: wrap; 
}

.hero-visual { 
  display: flex; 
  align-items: center; 
  justify-content: center;
  order: 1;
}

@media (min-width: 768px) {
  .hero-visual {
    order: 2;
  }
}

.visual-placeholder { 
  width: 100%; 
  height: 180px;
  border: 1px dashed var(--border); 
  border-radius: 12px; 
  display: grid; 
  place-items: center; 
  color: #b7c1d1; 
  background: rgba(255,255,255,0.04); 
}

@media (min-width: 768px) {
  .visual-placeholder {
    height: 200px;
  }
}

/* ========== AUTHORS ========== */
.authors-section { 
  display: grid; 
  gap: 0.3rem; 
  margin: 0.75rem 0; 
}

.author-names { 
  font-weight: 500; 
  font-size: 1rem; 
  line-height: 1.5; 
}

@media (min-width: 768px) {
  .author-names {
    font-size: 0.95rem;
    line-height: 1.4;
  }
}

.affiliations { 
  font-size: 0.9rem; 
  color: var(--muted); 
  margin-top: 0.2rem; 
}

@media (min-width: 768px) {
  .affiliations {
    font-size: 0.85rem;
  }
}

.affiliation { 
  margin-bottom: 0.1rem; 
}

/* ========== BUTTONS - Mobile First ========== */
.btn { 
  display: inline-block; 
  padding: .85rem 1.25rem;
  border-radius: 12px; 
  border: 1px solid var(--border); 
  color: var(--text); 
  text-decoration: none; 
  background: rgba(255,255,255,0.06); 
  box-shadow: var(--shadow); 
  font-size: 1rem;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  text-align: center;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
}

@media (min-width: 768px) {
  .btn {
    padding: .65rem 1rem;
    font-size: .98rem;
    min-height: auto;
  }
}

.btn:hover { 
  transform: translateY(-1px); 
  box-shadow: 0 12px 28px rgba(2,6,23,0.1);
}

@media (min-width: 768px) {
  .btn:hover {
    transform: translateY(-2px);
  }
}

.btn.primary { 
  background: linear-gradient(135deg, var(--brand), var(--accent)); 
  border-color: transparent; 
  color: #0b1220; 
  font-weight: 800; 
  position: relative; 
  overflow: hidden; 
}

.btn.primary::after { 
  content: ""; 
  position: absolute; 
  inset: 0; 
  background: linear-gradient(120deg, transparent 0%, rgba(255,255,255,0.25) 30%, transparent 60%); 
  transform: translateX(-100%); 
  transition: transform .6s ease; 
}

.btn.primary:hover::after { 
  transform: translateX(100%); 
}

.btn.secondary { 
  background: rgba(255,255,255,0.06); 
}

.btn.big { 
  padding: 1.1rem 1.25rem; 
  font-size: 1.05rem;
  gap: .55rem;
  min-height: 56px; 
}

@media (min-width: 768px) {
  .btn.big {
    padding: 1rem 1.1rem;
    font-size: 1.02rem;
    min-height: 54px;
  }
}

.btn.big i { 
  font-size: 1.1rem; 
  opacity: .9; 
}

/* ========== SECTIONS ========== */
.section { 
  max-width: 1100px; 
  margin: 0 auto; 
  padding: 2rem 1rem; 
  background: transparent; 
  min-width: 0; /* Important for grid items */
}

@media (min-width: 768px) {
  .section {
    padding: 1.5rem .9rem;
  }
}

.section h2 { 
  font-size: clamp(1.5rem, 4vw, 2rem); 
  margin: 0 0 1rem; 
  background: linear-gradient(90deg, #93c5fd, #22d3ee); 
  -webkit-background-clip: text; 
  background-clip: text; 
  color: transparent; 
}

@media (min-width: 768px) {
  .section h2 {
    font-size: clamp(1.3rem, 1.3vw + .8rem, 1.9rem);
    margin: 0 0 .6rem;
  }
}

.section p { 
  color: var(--text); 
  line-height: 1.7;
}

/* ========== LAYOUT ========== */
.layout { 
  max-width: 1100px; 
  margin: 0 auto; 
  display: grid; 
  grid-template-columns: 1fr; 
  gap: 0; 
  padding: 0 1rem;
  /* Prevent grid blowout */
  min-width: 0; 
}

@media (min-width: 768px) {
  .layout {
    padding: 0 .9rem;
  }
}
/* ... existing toc styles ... */
.toc { 
  display: none; 
}

.toc-title { 
  font-weight: 700; 
  color: var(--text); 
  margin: .2rem 0 .4rem; 
}

.toc ol { 
  list-style: none; 
  margin: 0; 
  padding: 0; 
  display: grid; 
  gap: .3rem; 
}

.toc a { 
  color: var(--muted); 
  text-decoration: none; 
  padding: .5rem .6rem; 
  display: block; 
  border-radius: 8px;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.toc a:hover { 
  background: rgba(255,255,255,0.06); 
  color: var(--text); 
}

.paper { 
  display: grid; 
  gap: 1rem; 
  min-width: 0; /* Prevent grid blowout */
}

@media (min-width: 768px) {
  .paper {
    gap: .6rem;
  }
}

.paper-section { 
  padding-left: 0; 
  border-left: none; 
}

.full-width { 
  grid-column: 1 / -1; 
}

/* ========== KEY POINTS ========== */
.keypoints { 
  list-style: none; 
  padding: 0; 
  margin: 1rem 0 0; 
  display: grid; 
  gap: 1rem; 
}

@media (min-width: 768px) {
  .keypoints {
    gap: .75rem;
  }
}

.keypoints li { 
  background: var(--panel); 
  border: 1px solid var(--border); 
  border-radius: 12px; 
  padding: 1.25rem 1.25rem; 
  box-shadow: var(--shadow);
  backdrop-filter: blur(4px);
}

@media (min-width: 768px) {
  .keypoints li {
    padding: 1rem 1.1rem;
    backdrop-filter: blur(8px);
  }
}

/* ========== STAGES - Mobile First Grid ========== */
.stages { 
  display: grid; 
  grid-template-columns: 1fr;
  gap: 1rem; 
}

@media (min-width: 640px) {
  .stages {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .stages {
    grid-template-columns: repeat(3, 1fr);
    gap: .8rem;
  }
}

.stage { 
  background: var(--panel); 
  border: 1px solid var(--border); 
  border-radius: 14px; 
  padding: 1.25rem; 
  box-shadow: var(--shadow);
  backdrop-filter: blur(4px);
}

@media (min-width: 768px) {
  .stage {
    padding: 1rem;
    backdrop-filter: blur(8px);
  }
}

.stage h3 { 
  margin-top: .2rem; 
}

.note { 
  color: var(--muted); 
  margin-top: .75rem; 
  font-size: .95rem;
}

.cta { 
  margin-top: 1.5rem; 
}

/* ========== TABLES - Mobile Optimized ========== */
.table-container { 
  overflow-x: auto; 
  border: 1px solid var(--border); 
  border-radius: 12px; 
  background: rgba(255,255,255,0.06); 
  box-shadow: var(--shadow);
  backdrop-filter: blur(4px);
  margin: 1rem 0;
  /* Scroll indicators */
  background: 
    linear-gradient(90deg, rgba(255,255,255,0.06), rgba(255,255,255,0.06)) center,
    linear-gradient(90deg, rgba(0,0,0,0.3), transparent 30px) left,
    linear-gradient(90deg, transparent calc(100% - 30px), rgba(0,0,0,0.3)) right;
  background-size: 100% 100%, 30px 100%, 30px 100%;
  background-repeat: no-repeat;
  background-attachment: local, scroll, scroll;
}

@media (min-width: 768px) {
  .table-container {
    backdrop-filter: blur(8px);
  }
}

.table-container.scrollable { 
  max-height: 400px; 
  overflow: auto; 
}

@media (min-width: 768px) {
  .table-container.scrollable {
    max-height: 460px;
  }
}

.data-table { 
  width: 100%; 
  border-collapse: collapse; 
  min-width: 100%;
}

@media (min-width: 640px) {
  .data-table {
    min-width: 600px;
  }
}

@media (min-width: 900px) {
  .data-table {
    min-width: 680px;
  }
}

.data-table thead th { 
  text-align: left; 
  font-weight: 600; 
  color: #c7d2fe; 
  padding: .9rem .75rem; 
  border-bottom: 1px solid var(--border); 
  background: linear-gradient(180deg, rgba(124,77,255,0.18), rgba(124,77,255,0.10)); 
  position: sticky; 
  top: 0; 
  z-index: 2;
  font-size: .9rem;
}

@media (min-width: 768px) {
  .data-table thead th {
    padding: .75rem .9rem;
    font-size: 1rem;
  }
}

.data-table tbody td { 
  padding: .9rem .75rem; 
  border-bottom: 1px solid var(--border);
  font-size: .9rem;
}

@media (min-width: 768px) {
  .data-table tbody td {
    padding: .7rem .9rem;
    font-size: 1rem;
  }
}

.data-table tbody tr:nth-child(2n) { 
  background: rgba(255,255,255,0.02); 
}

.data-table tbody tr:hover { 
  background: rgba(124,77,255,0.10); 
}

.data-table tbody tr.total td { 
  font-weight: 700; 
  color: var(--text); 
  background: rgba(34,211,238,0.12); 
}

.data-table caption { 
  caption-side: top; 
  text-align: left; 
  padding: .6rem .5rem .75rem; 
  color: var(--muted); 
  font-size: .9rem; 
}

@media (min-width: 768px) {
  .data-table caption {
    font-size: .92rem;
    padding: .5rem .2rem .6rem;
  }
}

.data-table th:nth-child(n+3),
.data-table td:nth-child(n+3) { 
  text-align: right; 
  font-variant-numeric: tabular-nums; 
}

/* Table helpers */
.underline { text-decoration: underline; }
.row-muted { background: rgba(255,255,255,0.03); }
.row-accent { background: rgba(34,211,238,0.10); }

/* ========== FIGURES ========== */
.figure-large { 
  margin: 1rem 0 1.25rem; 
  border: 1px solid var(--border); 
  border-radius: 12px; 
  overflow: hidden; 
  background: rgba(255,255,255,0.04); 
  box-shadow: var(--shadow);
  backdrop-filter: blur(4px);
}

@media (min-width: 768px) {
  .figure-large {
    margin: .75rem 0 1rem;
    backdrop-filter: blur(8px);
  }
}

.figure-large img { 
  display: block; 
  width: 100%; 
  height: auto; 
}

/* ========== RESULTS GRID - Mobile First ========== */
.results-grid { 
  display: grid; 
  grid-template-columns: 1fr;
  gap: 1rem; 
}

@media (min-width: 640px) {
  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .results-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: .8rem;
  }
}

.result-card { 
  background: var(--panel); 
  border: 1px solid var(--border); 
  border-radius: 14px; 
  padding: 1.25rem; 
  box-shadow: var(--shadow); 
  transition: transform .18s ease, box-shadow .18s ease;
  backdrop-filter: blur(4px);
}

@media (min-width: 768px) {
  .result-card {
    padding: 1.1rem;
    backdrop-filter: blur(8px);
  }
}

.result-card:hover { 
  transform: translateY(-3px); 
  box-shadow: 0 14px 30px rgba(2,6,23,0.12); 
}

/* ========== PEOPLE GRID - Mobile First ========== */
.people-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem; 
}

@media (min-width: 480px) {
  .people-grid {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  }
}

@media (min-width: 900px) {
  .people-grid {
    gap: .9rem;
  }
}

.person-card { 
  background: var(--panel); 
  border: 1px solid var(--border); 
  border-radius: 14px; 
  padding: 1.25rem; 
  text-align: center; 
  box-shadow: var(--shadow); 
  transition: transform .18s ease, box-shadow .18s ease;
  backdrop-filter: blur(4px);
}

@media (min-width: 768px) {
  .person-card {
    padding: 1.1rem;
    backdrop-filter: blur(8px);
  }
}

.person-card:hover { 
  transform: translateY(-3px); 
  box-shadow: 0 14px 30px rgba(2,6,23,0.12); 
}

.person-image { 
  width: 100%; 
  aspect-ratio: 1/1; 
  border-radius: 10px; 
  overflow: hidden; 
  border: 1px solid var(--border); 
  margin-bottom: .75rem; 
  background: #fff; 
}

@media (min-width: 768px) {
  .person-image {
    margin-bottom: .6rem;
  }
}

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

.person-card h3 { 
  margin: .2rem 0 .2rem; 
  font-size: 1.05rem; 
}

@media (min-width: 768px) {
  .person-card h3 {
    font-size: 1rem;
  }
}

.person-card .affiliation { 
  color: var(--muted); 
  font-size: .95rem; 
}

@media (min-width: 768px) {
  .person-card .affiliation {
    font-size: .9rem;
  }
}

/* ========== DOWNLOAD GRID - Mobile First ========== */
.download { width: 100%; }

.download-grid { 
  display: grid; 
  grid-template-columns: 1fr;
  gap: 1rem; 
  align-items: stretch; 
}

@media (min-width: 560px) {
  .download-grid {
    grid-template-columns: 1fr 1fr;
    gap: .9rem;
  }
}

@media (min-width: 900px) {
  .download-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========== CITATION ========== */
.citation { width: 100%; }

/* ========== MODAL ========== */
.modal { 
  position: fixed; 
  inset: 0; 
  display: none; 
  align-items: center; 
  justify-content: center; 
  z-index: 1000;
  padding: 1rem;
}

.modal.show { 
  display: flex; 
}

.modal-backdrop { 
  position: absolute; 
  inset: 0; 
  background: rgba(2,6,23,0.75);
  backdrop-filter: blur(4px);
}

@media (min-width: 768px) {
  .modal-backdrop {
    background: rgba(2,6,23,0.6);
  }
}

.modal-content { 
  position: relative; 
  width: min(800px, 100%);
  max-width: calc(100vw - 2rem);
  background: var(--panel); 
  border: 1px solid var(--border); 
  border-radius: 14px; 
  box-shadow: var(--shadow); 
  padding: 1.25rem; 
  z-index: 1001;
  backdrop-filter: blur(8px);
  max-height: calc(100vh - 2rem);
  overflow: auto;
}

@media (min-width: 768px) {
  .modal-content {
    padding: .9rem;
    max-height: none;
    overflow: visible;
  }
}

.modal-header { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  gap: .75rem; 
  margin-bottom: .75rem;
  flex-wrap: wrap;
}

@media (min-width: 768px) {
  .modal-header {
    gap: .5rem;
    margin-bottom: .5rem;
    flex-wrap: nowrap;
  }
}

.modal-header h3 { 
  margin: 0;
  font-size: 1.25rem;
}

@media (min-width: 768px) {
  .modal-header h3 {
    font-size: 1.1rem;
  }
}

.modal-close { 
  background: rgba(255,255,255,0.06); 
  border: 1px solid var(--border); 
  color: var(--text); 
  border-radius: 8px; 
  padding: .5rem .75rem; 
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  touch-action: manipulation;
}

@media (min-width: 768px) {
  .modal-close {
    padding: .25rem .5rem;
    min-height: auto;
    min-width: auto;
  }
}

.modal-body { 
  max-height: 50vh; 
  overflow: auto; 
}

@media (min-width: 768px) {
  .modal-body {
    max-height: 60vh;
  }
}

.citation-box {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}

.code-block {
  display: block;
  width: 100%;
  margin: 0;
  padding: 1rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
  font-size: 0.8rem;
  overflow-x: auto;
  white-space: pre;
  scrollbar-width: thin;
  scrollbar-color: var(--muted) var(--panel);
  -webkit-overflow-scrolling: touch;
}

@media (min-width: 640px) {
  .code-block {
    font-size: 0.85rem;
    padding: .8rem;
  }
}

@media (min-width: 768px) {
  .code-block {
    font-size: 0.9em;
  }
}

.code-block::-webkit-scrollbar {
  height: 10px;
}

.code-block::-webkit-scrollbar-thumb {
  background: var(--muted);
  border-radius: 4px;
}

.code-block::-webkit-scrollbar-track {
  background: transparent;
}

.citation-actions { 
  margin-top: 1rem; 
  display: flex; 
  justify-content: flex-end;
  gap: .75rem;
  flex-direction: column;
}

@media (min-width: 640px) {
  .citation-actions {
    flex-direction: row;
  }
}

.citation-actions .btn {
  width: 100%;
}

@media (min-width: 640px) {
  .citation-actions .btn {
    width: auto;
  }
}

.modal-footer { 
  display: flex; 
  justify-content: flex-end; 
  gap: .75rem; 
  margin-top: 1rem;
  flex-direction: column;
}

@media (min-width: 640px) {
  .modal-footer {
    flex-direction: row;
    gap: .5rem;
    margin-top: .7rem;
  }
}

/* ========== FOOTER ========== */
.site-footer { 
  border-top: 1px solid var(--border); 
  color: var(--muted); 
  text-align: center; 
  padding: 1.5rem 1rem; 
  background: rgba(17,24,39,0.95);
  font-size: .95rem;
}

@media (min-width: 768px) {
  .site-footer {
    padding: 1.1rem .9rem;
    background: rgba(17,24,39,0.6);
    backdrop-filter: blur(8px);
    font-size: 1rem;
  }
}

/* ========== BACK TO TOP ========== */
.back-to-top { 
  position: fixed; 
  right: 1rem; 
  bottom: 1rem; 
  padding: .85rem .95rem; 
  border-radius: 999px; 
  border: 1px solid var(--border); 
  background: #11172f; 
  color: var(--text); 
  box-shadow: var(--shadow); 
  opacity: 0; 
  pointer-events: none; 
  transition: opacity .2s ease, transform .2s ease;
  min-width: 48px;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
}

@media (min-width: 768px) {
  .back-to-top {
    padding: .6rem .75rem;
    min-width: auto;
    min-height: auto;
  }
}

.back-to-top.show { 
  opacity: 1; 
  pointer-events: auto; 
  transform: translateY(0); 
}

/* ========== ACCESSIBILITY & MOTION ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .btn, 
  .result-card, 
  .person-card, 
  .nav-link::after,
  .back-to-top { 
    transition: none; 
  }
}

/* Focus styles for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Improve tap targets on touch devices */
@media (hover: none) and (pointer: coarse) {
  .btn,
  .nav-link,
  .toc a,
  .hamburger,
  .modal-close,
  .back-to-top {
    min-height: 44px;
    min-width: 44px;
  }
}

/* Print styles */
@media print {
  .navbar,
  .hamburger,
  .back-to-top,
  .hero-buttons,
  .cta {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .section {
    page-break-inside: avoid;
  }
}