/* =========================================================
   AgentArk — Project page design system
   Design tokens + components, layered on top of Bulma
   ========================================================= */

:root {
  /* Brand */
  --primary-1: #667eea;
  --primary-2: #764ba2;
  --accent-1: #0d9488;
  --accent-2: #16a34a;
  --warm-1:   #d97706;
  --warm-2:   #b91c1c;
  --rose-1:   #db2777;
  --rose-2:   #a21caf;

  /* Ink + surface */
  --ink:        #1f2937;
  --ink-soft:   #4b5563;
  --ink-xsoft:  #6b7280;
  --ink-faint:  #9ca3af;
  --paper:      #ffffff;
  --tint:       #f5f7ff;
  --tint-warm:  #fff8f1;
  --surface:    #ffffff;
  --line:       #e5e7eb;
  --line-soft:  #eef0fb;

  /* Shape + motion */
  --radius-card:    16px;
  --radius-card-lg: 20px;
  --radius-pill:    999px;
  --shadow-card:        0 6px 18px rgba(31, 41, 55, 0.06);
  --shadow-card-hover:  0 14px 36px rgba(102, 126, 234, 0.18);
  --shadow-soft:        0 2px 8px rgba(31, 41, 55, 0.05);
  --transition-lift: transform .22s ease, box-shadow .22s ease, border-color .22s ease, background .22s ease;

  /* Layout */
  --container-max: 1100px;
  --nav-height:    64px;
}

/* ---------- Base + typography ---------- */

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 12px);
}

body {
  font-family: 'Noto Sans', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6,
.title, .publication-title, .publication-authors {
  font-family: 'Google Sans', system-ui, sans-serif;
  color: var(--ink);
}

.section {
  padding: 4rem 1.5rem;
}

.section.alt-bg {
  background: linear-gradient(180deg, var(--tint) 0%, #ffffff 100%);
}

.container.is-max-desktop {
  max-width: var(--container-max) !important;
}

/* Section eyebrow + title rhythm */
.section-eyebrow {
  display: inline-block;
  font-family: 'Google Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--primary-1);
  background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.6rem;
}

.section-title {
  font-family: 'Google Sans', sans-serif;
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin: 0 0 0.75rem 0;
  color: var(--ink);
}

.section-lead {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 760px;
  margin: 0 auto 2rem auto;
  line-height: 1.65;
}

.section-head {
  text-align: center;
  margin-bottom: 2.25rem;
}

/* ---------- Sticky navigation ---------- */

.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(31, 41, 55, 0.06);
}

.topnav .nav-inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.topnav .brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: 'Google Sans', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
}

.topnav .brand .brand-emoji {
  font-size: 1.3rem;
  line-height: 1;
}

.topnav .brand .brand-name {
  background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.topnav .links {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.topnav .links a {
  position: relative;
  font-family: 'Google Sans', sans-serif;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.4rem 0;
  transition: color .2s ease;
}

.topnav .links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-1), var(--primary-2));
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}

.topnav .links a:hover,
.topnav .links a.is-active {
  color: var(--ink);
}

.topnav .links a:hover::after,
.topnav .links a.is-active::after {
  transform: scaleX(1);
}

.topnav .nav-toggle {
  display: none;
  border: none;
  background: transparent;
  font-size: 1.4rem;
  color: var(--ink);
  cursor: pointer;
}

/* ---------- Hero ---------- */

.hero-section {
  position: relative;
  overflow: hidden;
  padding: 4.5rem 1.5rem 3.5rem;
  background:
    radial-gradient(900px circle at 20% 0%, rgba(118, 75, 162, 0.18), transparent 60%),
    radial-gradient(700px circle at 95% 20%, rgba(56, 239, 125, 0.14), transparent 65%),
    radial-gradient(800px circle at 50% 100%, rgba(102, 126, 234, 0.18), transparent 65%),
    linear-gradient(180deg, #ffffff 0%, var(--tint) 100%);
}

.hero-section::before,
.hero-section::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.45;
  z-index: 0;
  pointer-events: none;
  animation: float-orb 18s ease-in-out infinite;
}

.hero-section::before {
  width: 360px;
  height: 360px;
  top: -120px;
  left: -100px;
  background: radial-gradient(circle, var(--primary-1), transparent 70%);
}

.hero-section::after {
  width: 320px;
  height: 320px;
  bottom: -120px;
  right: -80px;
  background: radial-gradient(circle, var(--accent-2), transparent 70%);
  animation-delay: -9s;
}

@keyframes float-orb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(20px, -25px) scale(1.08); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  text-align: center;
}

.venue-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(102, 126, 234, 0.25);
  color: var(--primary-2);
  font-family: 'Google Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  box-shadow: var(--shadow-soft);
  margin-bottom: 1.4rem;
}

.venue-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.18);
}

.title-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.1rem;
  margin: 0.4rem 0 1.2rem;
  flex-wrap: wrap;
}

.title-emoji {
  font-size: 4rem;
  line-height: 1;
  filter: drop-shadow(0 6px 18px rgba(102, 126, 234, 0.35));
}

.paper-title {
  font-family: 'Google Sans', sans-serif;
  font-size: clamp(1.85rem, 3.6vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0;
  text-align: left;
  color: var(--ink);
}

.paper-title .accent {
  background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.author-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem 0.55rem;
  margin: 0.4rem auto 0.85rem;
  max-width: 880px;
}

.author-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 0.18rem;
  padding: 0.32rem 0.7rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(102, 126, 234, 0.15);
  font-family: 'Google Sans', sans-serif;
  font-size: 0.95rem;
  color: var(--ink);
  transition: var(--transition-lift);
}

.author-chip a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
}

.author-chip:hover {
  background: #ffffff;
  border-color: var(--primary-1);
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(102, 126, 234, 0.18);
}

.author-chip sup {
  font-size: 0.7em;
  color: var(--primary-2);
  font-weight: 600;
}

.author-chip .corr {
  color: var(--warm-2);
  font-weight: 700;
  margin-left: 1px;
}

.affiliations {
  margin: 0.5rem auto 0.25rem;
  font-family: 'Google Sans', sans-serif;
  font-size: 0.92rem;
  color: var(--ink-soft);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem 1rem;
  max-width: 880px;
}

.affiliations sup {
  color: var(--primary-2);
  font-weight: 700;
  margin-right: 2px;
}

.corr-note {
  font-size: 0.78rem;
  color: var(--ink-xsoft);
  margin-top: 0.35rem;
}

.corr-note .corr {
  color: var(--warm-2);
  font-weight: 700;
}

.cta-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.35rem;
  border-radius: var(--radius-pill);
  font-family: 'Google Sans', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: var(--transition-lift);
  cursor: pointer;
}

.cta i {
  font-size: 1.05rem;
}

.cta-paper {
  color: #ffffff;
  background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
  box-shadow: 0 8px 22px rgba(118, 75, 162, 0.32);
}

.cta-paper:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(118, 75, 162, 0.42);
  color: #ffffff;
}

.cta-code {
  color: #ffffff;
  background: linear-gradient(135deg, #1f2937, #111827);
  box-shadow: 0 6px 16px rgba(17, 24, 39, 0.28);
}

.cta-code:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #111827, #000000);
  color: #ffffff;
}

.cta-poster {
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  box-shadow: 0 6px 18px rgba(13, 148, 136, 0.32);
}

.cta-poster:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(13, 148, 136, 0.42);
  color: #ffffff;
}

.cta-outline {
  color: var(--primary-2);
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(102, 126, 234, 0.45);
}

.cta-outline:hover {
  transform: translateY(-2px);
  border-color: var(--primary-2);
  background: #ffffff;
  color: var(--primary-2);
  box-shadow: 0 8px 18px rgba(102, 126, 234, 0.18);
}

.cta:focus-visible,
.author-chip a:focus-visible,
.copy-bib:focus-visible,
.topnav .links a:focus-visible,
.topnav .brand:focus-visible {
  outline: 2px solid var(--primary-1);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- Headline metrics strip ---------- */

.metric-strip {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem 2.5rem;
  position: relative;
  z-index: 2;
}

.metric-strip-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  background: #ffffff;
  border-radius: var(--radius-card-lg);
  padding: 1.6rem 1.25rem;
  box-shadow: 0 18px 48px rgba(31, 41, 55, 0.10);
  border: 1px solid rgba(102, 126, 234, 0.10);
  transform: translateY(-1.5rem);
}

.metric-cell {
  text-align: center;
  padding: 0.4rem 0.75rem;
  border-right: 1px solid var(--line-soft);
}

.metric-cell:last-child {
  border-right: none;
}

.metric-cell .num {
  display: block;
  font-family: 'Google Sans', sans-serif;
  font-weight: 700;
  font-size: 2.1rem;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-cell.tone-teal .num {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
}

.metric-cell.tone-warm .num {
  background: linear-gradient(135deg, var(--warm-1), var(--warm-2));
  -webkit-background-clip: text;
  background-clip: text;
}

.metric-cell.tone-rose .num {
  background: linear-gradient(135deg, var(--rose-1), var(--rose-2));
  -webkit-background-clip: text;
  background-clip: text;
}

.metric-cell .label {
  display: block;
  margin-top: 0.4rem;
  font-family: 'Google Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

/* ---------- Abstract card ---------- */

.abstract-card {
  position: relative;
  background: #ffffff;
  border-radius: var(--radius-card-lg);
  padding: 2rem 2.2rem;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

.abstract-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(180deg, var(--primary-1), var(--primary-2));
}

.abstract-card p {
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0;
  text-align: justify;
}

.abstract-card p + p {
  margin-top: 1rem;
}

.abstract-card strong {
  color: var(--primary-2);
  font-weight: 700;
}

/* ---------- Card grids ---------- */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

/* Feature cards (contributions) */
.feature-card {
  position: relative;
  background: #ffffff;
  border-radius: var(--radius-card);
  padding: 1.8rem 1.4rem;
  text-align: center;
  border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-card);
  transition: var(--transition-lift);
  height: 100%;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-1), var(--primary-2));
  opacity: 0.9;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(102, 126, 234, 0.35);
}

.feature-card .feature-icon-wrap {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.12), rgba(118, 75, 162, 0.12));
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.feature-card .feature-icon-wrap i {
  font-size: 1.6rem;
  background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature-card h4 {
  font-family: 'Google Sans', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.55rem 0;
  color: var(--ink);
}

.feature-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.55;
}

/* Tone variants for feature cards */
.feature-card.tone-teal::before {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
}
.feature-card.tone-teal .feature-icon-wrap {
  background: linear-gradient(135deg, rgba(17, 153, 142, 0.12), rgba(56, 239, 125, 0.12));
}
.feature-card.tone-teal .feature-icon-wrap i {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
}

.feature-card.tone-warm::before {
  background: linear-gradient(90deg, var(--warm-1), var(--warm-2));
}
.feature-card.tone-warm .feature-icon-wrap {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.13), rgba(239, 68, 68, 0.13));
}
.feature-card.tone-warm .feature-icon-wrap i {
  background: linear-gradient(135deg, var(--warm-1), var(--warm-2));
  -webkit-background-clip: text;
  background-clip: text;
}

/* Methodology step */
.methodology-step {
  position: relative;
  background: #ffffff;
  border: 1px solid var(--line-soft);
  border-left: 5px solid var(--primary-1);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  padding: 1.4rem 1.6rem;
  margin: 1rem 0;
  box-shadow: var(--shadow-card);
  transition: var(--transition-lift);
}

.methodology-step:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-card-hover);
}

.methodology-step.tone-teal { border-left-color: var(--accent-1); }
.methodology-step.tone-warm { border-left-color: var(--warm-1); }
.methodology-step.tone-rose { border-left-color: var(--rose-2); }

.methodology-step h4 {
  font-family: 'Google Sans', sans-serif;
  font-size: 1.1rem;
  margin: 0 0 0.45rem 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  color: var(--ink);
}

.methodology-step p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.97rem;
  line-height: 1.6;
}

.tag-label {
  display: inline-block;
  font-family: 'Google Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
  color: #ffffff;
  padding: 0.22rem 0.65rem;
  border-radius: var(--radius-pill);
}

.methodology-step.tone-teal .tag-label {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
}
.methodology-step.tone-warm .tag-label {
  background: linear-gradient(135deg, var(--warm-1), var(--warm-2));
}
.methodology-step.tone-rose .tag-label {
  background: linear-gradient(135deg, var(--rose-1), var(--rose-2));
}

/* Findings */
.findings-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
}

.finding-card {
  position: relative;
  background: #ffffff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  padding: 1.5rem 1.4rem 1.4rem;
  box-shadow: var(--shadow-card);
  transition: var(--transition-lift);
  overflow: hidden;
}

.finding-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-1), var(--primary-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}

.finding-card:hover {
  transform: translateY(-4px);
  border-color: rgba(102, 126, 234, 0.3);
  box-shadow: var(--shadow-card-hover);
}

.finding-card:hover::before {
  transform: scaleX(1);
}

.finding-card .num-badge {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  font-family: 'Google Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary-2);
  background: rgba(102, 126, 234, 0.12);
  border-radius: var(--radius-pill);
  padding: 0.16rem 0.55rem;
}

.finding-card .finding-title {
  display: block;
  font-family: 'Google Sans', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
  margin-bottom: 0.5rem;
  padding-right: 2.5rem;
  line-height: 1.35;
}

.finding-card p {
  margin: 0;
  font-size: 0.93rem;
  color: var(--ink-soft);
  line-height: 1.55;
}

/* Highlight box (call-out) */
.highlight-box {
  position: relative;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.08), rgba(118, 75, 162, 0.06));
  border: 1px solid rgba(102, 126, 234, 0.18);
  color: var(--ink);
  padding: 1.4rem 1.6rem;
  border-radius: var(--radius-card);
  margin: 1.6rem 0;
  text-align: center;
  transition: var(--transition-lift);
}

.highlight-box:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(102, 126, 234, 0.18);
  border-color: rgba(102, 126, 234, 0.3);
}

.highlight-box h4 {
  background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: 'Google Sans', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  margin: 0;
}

.highlight-box p {
  margin: 0.5rem 0 0;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

/* ---------- Figure cards ---------- */

.fig-card {
  background: #ffffff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  padding: 1.1rem;
  box-shadow: var(--shadow-card);
  transition: var(--transition-lift);
  text-align: center;
  height: 100%;
}

.fig-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.fig-card img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
  border-radius: 10px;
}

.fig-card .caption {
  margin-top: 0.85rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
  font-style: italic;
  line-height: 1.5;
}

.fig-full {
  background: #ffffff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  padding: 1.4rem;
  box-shadow: var(--shadow-card);
  text-align: center;
}

.fig-full img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
  border-radius: 10px;
}

.fig-full .caption {
  margin-top: 0.85rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
  font-style: italic;
  line-height: 1.5;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- BibTeX dark block ---------- */

.bibtex-section {
  background: linear-gradient(180deg, var(--tint) 0%, #ffffff 100%);
}

.bibtex-wrap {
  background: #1f2937;
  border-radius: var(--radius-card-lg);
  box-shadow: 0 18px 40px rgba(31, 41, 55, 0.18);
  overflow: hidden;
  border: 1px solid #111827;
}

.bibtex-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.1rem;
  background: #111827;
  border-bottom: 1px solid #0b1220;
}

.bibtex-bar .dots {
  display: inline-flex;
  gap: 0.4rem;
}

.bibtex-bar .dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.bibtex-bar .dots .red    { background: #ff5f56; }
.bibtex-bar .dots .yellow { background: #ffbd2e; }
.bibtex-bar .dots .green  { background: #27c93f; }

.bibtex-bar .file-name {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  color: #d1d5db;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.copy-bib {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.06);
  color: #e5e7eb;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-pill);
  padding: 0.32rem 0.85rem;
  font-family: 'Google Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-lift);
}

.copy-bib:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.22);
  color: #ffffff;
}

.copy-bib.is-copied {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: #ffffff;
  border-color: transparent;
}

.bibtex-wrap pre {
  margin: 0;
  padding: 1.4rem 1.5rem;
  background: transparent;
  color: #e5e7eb;
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9rem;
  line-height: 1.65;
  overflow-x: auto;
}

.bibtex-wrap pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-family: inherit;
}

/* ---------- Footer ---------- */

.site-footer {
  padding: 2.5rem 1.5rem 3rem;
  background: #ffffff;
  border-top: 1px solid var(--line-soft);
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.65;
}

.site-footer a {
  color: var(--primary-2);
  text-decoration: none;
  border-bottom: 1px dashed rgba(118, 75, 162, 0.4);
}

.site-footer a:hover {
  border-bottom-style: solid;
}

.site-footer .footer-meta {
  margin-top: 0.6rem;
  font-size: 0.82rem;
  color: var(--ink-xsoft);
}

/* ---------- Reveal-on-scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s ease, transform .7s ease;
  will-change: opacity, transform;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-section::before,
  .hero-section::after {
    animation: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ---------- Helpers ---------- */

.results-caption {
  text-align: center;
  font-style: italic;
  color: var(--ink-xsoft);
  margin-top: 0.8rem;
  font-size: 0.92rem;
}

.subsection-title {
  font-family: 'Google Sans', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  margin: 1.6rem 0 0.8rem;
  text-align: center;
}

.subsection-title .accent {
  background: linear-gradient(135deg, var(--primary-1), var(--primary-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Legacy author list cleanup (kept for safety; new layout uses .author-chip) */
.publication-authors a {
  color: var(--primary-2);
}
.publication-authors a:hover {
  text-decoration: underline;
}

/* ---------- Responsive ---------- */

@media screen and (max-width: 960px) {
  .grid-3,
  .findings-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .metric-strip-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.4rem;
  }

  .metric-cell {
    border-right: none;
    border-bottom: 1px solid var(--line-soft);
    padding: 1rem 0.5rem;
  }

  .metric-cell:nth-last-child(-n+2) {
    border-bottom: none;
  }

  .paper-title {
    font-size: clamp(1.7rem, 5vw, 2.4rem);
    text-align: center;
  }

  .title-row {
    flex-direction: column;
    gap: 0.6rem;
  }

  .topnav .links {
    display: none;
  }

  .topnav .links.is-open {
    display: flex;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    z-index: 101;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(31, 41, 55, 0.08);
    gap: 0.85rem;
  }

  .topnav .nav-toggle {
    display: inline-flex;
  }
}

@media screen and (max-width: 640px) {
  .section {
    padding: 2.8rem 1rem;
  }

  .grid-3,
  .grid-2,
  .findings-grid {
    grid-template-columns: 1fr;
  }

  .metric-strip-grid {
    grid-template-columns: 1fr;
    padding: 1.2rem 1rem;
  }

  .metric-cell {
    border-bottom: 1px solid var(--line-soft);
    padding: 0.85rem 0.5rem;
  }

  .metric-cell:last-child { border-bottom: none; }

  .section-title {
    font-size: 1.7rem;
  }

  .abstract-card {
    padding: 1.4rem 1.2rem;
  }

  .abstract-card p {
    text-align: left;
  }

  .hero-section {
    padding: 3rem 1rem 2.5rem;
  }

  .title-emoji {
    font-size: 3rem;
  }

  .cta {
    width: 100%;
    justify-content: center;
  }
}

/* Soft fallback so very narrow screens still scroll figures */
img {
  max-width: 100%;
  height: auto;
}