/* ═══════════════════════════════════════════════════════
   art.css  —  ART Project Page
   Design: dark-first academic · violet system
   Fonts: Lora (title) + DM Sans (UI) + JetBrains Mono (code)
═══════════════════════════════════════════════════════ */

/* ── Design Tokens — DARK (default) ─────────────────── */
:root {
  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 16px;
  --font-body:  'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-title: 'Lora', Georgia, 'Times New Roman', serif;
  --font-mono:  'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
  --max-w: 1060px;

  --accent:       #7c6af7;
  --accent-mid:   #9d8fff;
  --accent-soft:  #b8b0ff;
  --accent-glow:  rgba(124,106,247,.28);
  --accent-glow2: rgba(124,106,247,.10);

  --text:    #f0eeff;
  --text-2:  #bab6d8;
  --muted:   #7a76a0;
  --subtle:  #4e4a6a;

  /* two-tone page background */
  --page-top:    #0b0917;
  --page-bottom: #0f0d1c;
  --bg:          #0f0d1c;
  --bg-2:        #14122a;

  /* frosted card surface */
  --card-bg:     rgba(255,255,255,.04);
  --card-border: rgba(255,255,255,.08);
  --card-shadow: 0 4px 32px rgba(0,0,0,.45);

  --border:  rgba(255,255,255,.07);
  --border-2:rgba(255,255,255,.12);

  --shadow-xs: 0 1px 3px rgba(0,0,0,.35);
  --shadow-sm: 0 2px 10px rgba(0,0,0,.40);
  --shadow-md: 0 4px 24px rgba(0,0,0,.50);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.60);

  --dot-color: rgba(255,255,255,.035);

  /* Nav */
  --nav-bg: rgba(11,9,23,.55);
  --nav-border: rgba(255,255,255,.07);
}

/* ── LIGHT Theme ─────────────────────────────────────── */
[data-theme="light"] {
  --accent:       #6d28d9;
  --accent-mid:   #7c3aed;
  --accent-soft:  #a78bfa;
  --accent-glow:  rgba(124,58,237,.18);
  --accent-glow2: rgba(124,58,237,.07);

  --text:    #1a1033;
  --text-2:  #3d3660;
  --muted:   #6e6a8a;
  --subtle:  #a09dc0;

  --page-top:    #f6f6fd;
  --page-bottom: #fdfcff;
  --bg:          #fdfcff;
  --bg-2:        #f4f2fb;

  --card-bg:     rgba(255,255,255,.72);
  --card-border: rgba(109,40,217,.10);
  --card-shadow: 0 4px 32px rgba(109,40,217,.08);

  --border:  rgba(109,40,217,.10);
  --border-2:rgba(109,40,217,.18);

  --shadow-xs: 0 1px 3px rgba(109,40,217,.06);
  --shadow-sm: 0 2px 10px rgba(109,40,217,.09);
  --shadow-md: 0 4px 24px rgba(109,40,217,.11);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.12);

  --dot-color: rgba(109,40,217,.06);

  --nav-bg: rgba(245,243,255,.75);
  --nav-border: rgba(109,40,217,.10);
}

/* ── Reset ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--text);
  font-size: 18px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-width: 900px;
  /* two-tone split background */
  background: linear-gradient(to bottom, var(--page-top), var(--page-bottom));
  background-attachment: fixed;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, var(--dot-color) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 70% 50% at 10% 30%, rgba(88,28,135,.22) 0%, transparent 70%),
    radial-gradient(ellipse 60% 55% at 80% 20%, rgba(30,58,138,.18) 0%, transparent 70%),
    radial-gradient(ellipse 55% 45% at 50% 80%, rgba(127,29,29,.14) 0%, transparent 70%),
    radial-gradient(ellipse 80% 60% at 90% 75%, rgba(88,28,135,.12) 0%, transparent 70%);
}

[data-theme="light"] body::after {
  background:
    radial-gradient(ellipse 70% 50% at 10% 30%, rgba(167,139,250,.10) 0%, transparent 70%),
    radial-gradient(ellipse 60% 55% at 80% 20%, rgba(147,197,253,.08) 0%, transparent 70%),
    radial-gradient(ellipse 55% 45% at 50% 80%, rgba(251,191,203,.07) 0%, transparent 70%),
    radial-gradient(ellipse 80% 60% at 90% 75%, rgba(167,139,250,.06) 0%, transparent 70%);
}

img { display: block; max-width: 100%; }
a { color: var(--accent-soft); text-decoration: none; transition: color .18s; }
a:hover { color: var(--accent-mid); text-decoration: underline; }
button { font-family: var(--font-body); }

/* ── Layout ─────────────────────────────────────────── */
.page-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

section.sec {
  padding: 4rem 0;
  position: relative;
  z-index: 1;
}

.section-divider { display: none; }

/* ── Frosted Card ────────────────────────────────────── */
.frosted-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  padding: 2rem 2.2rem;
}

/* ── Section Label ──────────────────────────────────── */
.section-label {
  font-family: var(--font-body);
  font-size: .88rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent-soft);
  text-align: center;
  margin-bottom: .75rem;
}

.section-title {
  font-family: var(--font-body);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  text-align: center;
  margin-bottom: 2rem;
  letter-spacing: -.02em;
  line-height: 1.2;
}

/* ── Prose helpers ──────────────────────────────────── */
.prose { color: var(--text-2); font-size: 1.18rem; line-height: 1.78; }
.prose strong { color: var(--text); font-weight: 700; }

.hint {
  display: flex; align-items: center; gap: .4rem;
  font-size: 1rem; color: var(--muted); margin-bottom: 1.2rem;
}
.hint svg { flex-shrink: 0; width: 14px; height: 14px; stroke: var(--subtle); fill: none; stroke-width: 2; }

/* ── Scroll-reveal ──────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .58s ease, transform .58s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .08s; }
.reveal-d2 { transition-delay: .16s; }
.reveal-d3 { transition-delay: .24s; }
.reveal-d4 { transition-delay: .32s; }


/* ═══════════════════════════════════════════════════════
   TOP NAV
═══════════════════════════════════════════════════════ */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: .65rem 2rem;
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--nav-border);
  transition: background .3s ease, border-color .3s ease;
}

.top-nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── REMOVED: .nav-logo-badge ── */

.top-nav-links {
  display: flex;
  align-items: center;
  gap: .1rem;
}

.nav-link {
  position: relative;
  font-size: .92rem;
  font-weight: 500;
  color: var(--muted);
  padding: .38rem .82rem;
  border-radius: 6px;
  text-decoration: none;
  transition: color .2s;
  letter-spacing: .01em;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-soft);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width .25s cubic-bezier(.4,0,.2,1);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
  text-decoration: none;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 55%;
}

.nav-link.active::after {
  background: var(--accent);
}

/* ── Theme toggle in nav ─────────────────────────────── */
.nav-theme-toggle {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 99px;
  padding: 3px;
  backdrop-filter: blur(8px);
}

.nav-theme-btn {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s, color .2s;
  color: var(--muted);
}

.nav-theme-btn svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

.nav-theme-btn.active {
  background: var(--accent);
  color: #fff;
}

.nav-theme-btn:hover:not(.active) {
  background: var(--card-border);
  color: var(--text);
}


/* ═══════════════════════════════════════════════════════
   HERO
═══════════════════════════════════════════════════════ */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 640px;
  display: flex;
  flex-direction: column;
  border-bottom: none;
  padding-top: 52px;
  margin-top: 130px;
}

.hero-reel {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.reel-row { flex: 1; overflow: hidden; position: relative; }

.reel-track {
  display: flex;
  gap: 14px;
  height: 100%;
  position: absolute;
  top: 0; left: 0;
  width: max-content;
}

@keyframes reelLtr {
  from { transform: translateX(0); }
  to   { transform: translateX(calc(-50% - 7px)); }
}
@keyframes reelRtl {
  from { transform: translateX(calc(-50% - 7px)); }
  to   { transform: translateX(0); }
}

.reel-ltr { animation: reelLtr linear infinite; }
.reel-rtl { animation: reelRtl linear infinite; }
.reel-offset { animation-delay: -4s; }

.reel-group {
  flex-shrink: 0;
  height: 100%;
  width: 200px;
  border-radius: 8px;
  overflow: hidden;
}

.reel-img {
  height: 100%;
  width: 100%;
  object-fit: cover;
  display: block;
  flex-shrink: 0;
}

/* ── Dark overlay ────────────────────────────────────── */
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(
      to right,
      rgba(6, 3, 16, .52) 0%,
      rgba(6, 3, 16, .65) 20%,
      rgba(6, 3, 16, .70) 40%,
      rgba(6, 3, 16, .65) 80%,
      rgba(6, 3, 16, .52) 100%
    ),
    linear-gradient(
      to top,
      rgba(0,0,0,.32) 0%,
      transparent 55%
    );
}

/* Light theme hero overlay */
[data-theme="light"] .hero-overlay {
  background:
    linear-gradient(
      to right,
      rgba(30,28,40,.28) 0%,
      rgba(30,28,40,.42) 20%,
      rgba(30,28,40,.48) 40%,
      rgba(30,28,40,.42) 80%,
      rgba(30,28,40,.28) 100%
    ),
    linear-gradient(
      to top,
      rgba(30,28,40,.32) 0%,
      transparent 55%
    );
}

/* ── Content ─────────────────────────────────────────── */
.hero-content {
  position: relative;
  z-index: 2;
  padding: 4.5rem 0 5rem;
  text-align: center;
}

/* ── Venue badge ─────────────────────────────────────── */
.pub-venue {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .72rem; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  color: rgba(255,255,255,.9);
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  padding: .28rem .9rem;
  border-radius: 99px;
  margin-bottom: 1.6rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.pub-venue-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent-soft); }

/* ── Split title ─────────────────────────────────────── */
.pub-title {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  max-width: 900px;
  margin: 0 auto 2rem;
}

.pub-title-line1 {
  font-family: var(--font-title);
  font-size: 3.4rem;
  font-weight: 700;
  line-height: 1.25;
  color: #fff;
  letter-spacing: -.01em;
  text-align: center;
  width: 100%;
  text-shadow: 0 2px 20px rgba(0,0,0,.55), 0 1px 4px rgba(0,0,0,.4);
}

.pub-title-line2 {
  font-family: var(--font-title);
  font-size: 2.1rem;
  font-weight: 600;
  line-height: 1.3;
  color: rgba(255,255,255,.88);
  letter-spacing: -.005em;
  text-align: center;
  width: 100%;
  text-shadow: 0 1px 12px rgba(0,0,0,.5);
}

.title-accent {
  background: linear-gradient(135deg, var(--accent-soft) 0%, #fff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Authors ─────────────────────────────────────────── */
.authors-block {
  margin-bottom: 1rem;
  padding-top: 1.2rem;
}
.authors-list {
  display: flex; flex-wrap: wrap;
  justify-content: center;
  gap: .18rem .4rem;
  font-size: 1.05rem; color: rgba(255,255,255,.92); font-weight: 400;
  text-shadow: 0 1px 8px rgba(0,0,0,.45);
}
.author { white-space: nowrap; }
.author sup { font-size: .65em; color: rgba(255,255,255,.65); margin-left: 1px; }
.authors-sep { color: rgba(255,255,255,.3); }
.affiliations-list {
  display: flex; flex-wrap: wrap;
  justify-content: center;
  gap: .25rem 1.5rem;
  font-size: 1rem; color: rgba(255,255,255,.62); margin-top: .65rem;
  text-shadow: 0 1px 6px rgba(0,0,0,.4);
}
.affil { display: flex; align-items: baseline; gap: .22rem; }
.affil sup { font-size: .75em; color: rgba(255,255,255,.65); }
.corresp-note { font-size: .90rem; color: rgba(255,255,255,.45); margin-top: .55rem; }

/* ── Resource buttons ────────────────────────────────── */
.links-row {
  display: flex; flex-wrap: wrap;
  justify-content: center;
  gap: .55rem; margin-top: 2rem;
}
.link-btn {
  display: inline-flex; align-items: center; gap: .42rem;
  padding: .46rem 1.05rem;
  border-radius: 99px;
  font-size: .82rem; font-weight: 600; letter-spacing: .01em;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.10);
  color: rgba(255,255,255,.92);
  text-decoration: none;
  transition: transform .17s ease, box-shadow .17s ease, background .17s ease, border-color .17s ease;
  white-space: nowrap;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.link-btn svg { width: 14px; height: 14px; flex-shrink: 0; stroke-width: 1.8; }
.link-btn:hover {
  transform: translateY(-2px);
  background: rgba(255,255,255,.18);
  border-color: rgba(255,255,255,.40);
  color: #fff; text-decoration: none;
  box-shadow: 0 4px 16px rgba(0,0,0,.25);
}
.link-btn.primary { background: var(--accent); border-color: transparent; color: #fff; }
.link-btn.primary:hover { background: var(--accent-mid); border-color: transparent; box-shadow: 0 4px 18px var(--accent-glow); }


/* ═══════════════════════════════════════════════════════
   LIGHTBOX
═══════════════════════════════════════════════════════ */
#lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(6, 4, 18, .92);
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}
#lightbox.open { display: flex; }

#lightboxImg {
  max-width: 88vw;
  max-height: 88vh;
  border-radius: var(--radius);
  box-shadow: 0 12px 60px rgba(0,0,0,.7);
  pointer-events: none;
  animation: lbIn .2s ease;
}

@keyframes lbIn {
  from { opacity: 0; transform: scale(.96); }
  to   { opacity: 1; transform: none; }
}

#lightboxClose {
  position: fixed;
  top: 18px;
  right: 22px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  color: #fff;
  font-size: 1.1rem;
  line-height: 1;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background .15s;
  font-family: var(--font-body);
}
#lightboxClose:hover { background: rgba(255,255,255,.22); }

.sol {
  position: absolute;
  top: 12px;
  z-index: 10;
  padding: 5px 13px;
  background: rgba(12, 8, 24, .42);
  backdrop-filter: blur(10px) saturate(160%);
  -webkit-backdrop-filter: blur(10px) saturate(160%);
  color: rgba(255,255,255,.95);
  font-size: .7rem;
  font-weight: 600;
  border-radius: 99px;
  letter-spacing: .07em;
  border: 1px solid rgba(255,255,255,.16);
  pointer-events: none;
  white-space: nowrap;
  font-family: var(--font-body);
  text-transform: uppercase;
}
.sol-left  { left: 12px; }
.sol-right { right: 12px; }

.thumb-zoom-btn {
  position: absolute;
  top: 5px;
  right: 5px;
  z-index: 6;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(26,16,51,.5);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .18s;
  padding: 0;
  backdrop-filter: blur(4px);
}
.thumb-zoom-btn svg {
  width: 11px;
  height: 11px;
  stroke: #fff;
  fill: none;
  stroke-width: 2;
}
.group-thumb:hover .thumb-zoom-btn,
.sota-pair-thumb:hover .thumb-zoom-btn,
.results-col-item:hover .thumb-zoom-btn { opacity: 1; }

img-comparison-slider {
  --divider-width: 2px;
  --divider-color: var(--accent-soft);
  --handle-opacity: .88;
  display: block;
  width: 100%;
}
img-comparison-slider img { width: 100%; display: block; }


/* ═══════════════════════════════════════════════════════
   §  Abstract — frosted card style
═══════════════════════════════════════════════════════ */
.abstract-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  padding: 2.4rem 2.8rem;
  max-width: 960px;
  margin: 0 auto;
}

.abstract-quote-mark {
  position: absolute;
  top: 1.6rem;
  left: 2rem;
  font-family: var(--font-title);
  font-size: 3.5rem;
  line-height: 1;
  color: var(--accent);
  opacity: .35;
  font-weight: 700;
  pointer-events: none;
  user-select: none;
}

.abstract-prose {
  color: var(--text-2);
  font-size: 1.16rem;
  line-height: 1.85;
  padding-left: .5rem;
}

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

.abstract-prose strong {
  color: var(--text);
  font-weight: 700;
}


/* ═══════════════════════════════════════════════════════
   §  Method Overview
═══════════════════════════════════════════════════════ */
.overview-img-wrap {
  width: 100%;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  margin-bottom: 1.5rem;
  border: 1px solid var(--card-border);
}
.overview-img-wrap img { width: 100%; }

.overview-points {
  display: flex;
  flex-direction: column;
  gap: .8rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.8rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.overview-point {
  display: flex;
  gap: .8rem;
  align-items: flex-start;
  font-size: 1.16rem;
  color: var(--text-2);
  line-height: 1.68;
}

.point-badge {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  color: #fff;
  font-size: .63rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: .2rem;
  font-family: var(--font-body);
}

.overview-point strong { color: var(--text); font-weight: 700; }


/* ═══════════════════════════════════════════════════════
   §  2K Carousel
═══════════════════════════════════════════════════════ */
.carousel-2k { position: relative; user-select: none; }

.carousel-track-wrap {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(16px);
}

.carousel-track {
  display: flex;
  transition: transform .46s cubic-bezier(.4,0,.2,1);
}

.carousel-slide {
  min-width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  box-sizing: border-box;
  padding: 12px;
}

.compare-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 9px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--card-border);
}

.group-thumbs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
}

.group-thumb {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 1/1;
  border: 1px solid var(--card-border);
}
.group-thumb img { width: 100%; height: 100%; object-fit: cover; }

.group-thumb-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(10,5,30,.55);
  color: #fff;
  font-size: .62rem;
  font-weight: 700;
  text-align: center;
  padding: 3px 0;
  letter-spacing: .07em;
  backdrop-filter: blur(2px);
}

.group-main-slider {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 1/1;
}
.group-main-slider img-comparison-slider { width: 100%; height: 100%; }
.group-main-slider img-comparison-slider img { width: 100%; height: 100%; object-fit: cover; }

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
  transition: border-color .17s, box-shadow .17s, transform .17s;
  backdrop-filter: blur(12px);
}
.carousel-btn:hover {
  border-color: var(--accent-soft);
  box-shadow: 0 3px 14px var(--accent-glow);
  transform: translateY(calc(-50% - 1px));
}
.carousel-btn:disabled { opacity: .28; cursor: default; transform: translateY(-50%); }
.carousel-btn svg { width: 17px; height: 17px; stroke: var(--text-2); stroke-width: 2.5; fill: none; }
.carousel-btn.prev { left: -20px; }
.carousel-btn.next { right: -20px; }

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 7px;
  margin-top: 14px;
}
.carousel-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--subtle);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background .2s, transform .2s;
}
.carousel-dot.active { background: var(--accent); transform: scale(1.4); }


/* ═══════════════════════════════════════════════════════
   §  SOTA Comparison
═══════════════════════════════════════════════════════ */
.sota-pair-row {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  margin-bottom: 18px;
  scrollbar-width: thin;
  scrollbar-color: var(--subtle) transparent;
}
.sota-pair-row::-webkit-scrollbar { height: 4px; }
.sota-pair-row::-webkit-scrollbar-thumb { background: var(--subtle); border-radius: 2px; }

.sota-pair-item {
  flex: 0 0 auto;
  cursor: pointer;
  border-radius: var(--radius-sm);
  border: 2px solid var(--card-border);
  padding: 5px;
  background: var(--card-bg);
  box-shadow: var(--shadow-xs);
  transition: border-color .2s, opacity .2s, box-shadow .18s;
  opacity: .42;
  backdrop-filter: blur(12px);
}
.sota-pair-item:hover { opacity: .75; box-shadow: var(--shadow-sm); }
.sota-pair-item.active {
  border-color: var(--accent);
  opacity: 1;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.sota-pair-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.sota-pair-thumb { position: relative; }
.sota-pair-thumb img { width: 200px; height: 200px; object-fit: cover; border-radius: 4px; }
.sota-pair-thumb-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: rgba(10,5,30,.52);
  color: #fff;
  font-size: .56rem;
  font-weight: 700;
  text-align: center;
  padding: 2px 0;
  border-radius: 0 0 4px 4px;
  letter-spacing: .06em;
}
.sota-pair-name {
  text-align: center;
  font-size: .66rem;
  font-weight: 600;
  color: var(--muted);
  margin-top: 4px;
}

.sota-body { display: flex; gap: 14px; align-items: stretch; }

.sota-slider-wrap {
  flex: 1;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--card-border);
}
.sota-slider-wrap img-comparison-slider { width: 100%; height: 100%; }
.sota-slider-wrap img-comparison-slider img { width: 100%; height: 100%; object-fit: cover; }

.sota-method-grid {
  flex: 0 0 325px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
  align-content: start;
}
.sota-method-item {
  cursor: pointer;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid transparent;
  background: var(--card-bg);
  box-shadow: var(--shadow-xs);
  transition: border-color .17s, transform .14s, box-shadow .14s;
  position: relative;
  backdrop-filter: blur(8px);
}
.sota-method-item:hover { transform: scale(1.04); box-shadow: var(--shadow-sm); }
.sota-method-item.active {
  border-color: var(--accent);
  box-shadow: 0 2px 12px var(--accent-glow);
}
.sota-method-item img { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
.sota-method-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: rgba(10,5,30,.60);
  color: #fff;
  font-size: .6rem;
  font-weight: 700;
  text-align: center;
  padding: 3px 0;
  letter-spacing: .05em;
  backdrop-filter: blur(2px);
}


/* ═══════════════════════════════════════════════════════
   §  More Visual Results
═══════════════════════════════════════════════════════ */
.results-body { display: flex; gap: 10px; align-items: stretch; }

.results-col { flex: 0 0 auto; display: flex; flex-direction: column; gap: 6px; }

.results-col-header {
  text-align: center;
  font-size: .65rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: .1em;
  text-transform: uppercase;
  padding-bottom: 4px;
  border-bottom: 1.5px solid var(--card-border);
  margin-bottom: 2px;
}

.results-col-item {
  position: relative;
  width: 154px;
  height: 154px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid var(--card-border);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  transition: border-color .17s, box-shadow .16s, opacity .16s;
  opacity: .5;
}
.results-col-item img { width: 100%; height: 100%; object-fit: cover; }
.results-col-item:hover { opacity: .8; box-shadow: var(--shadow-sm); }
.results-col-item.active {
  border-color: var(--accent);
  box-shadow: 0 2px 12px var(--accent-glow);
  opacity: 1;
}
.results-col-item.active::after {
  content: '';
  position: absolute;
  bottom: 5px; right: 5px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 2px rgba(255,255,255,.8);
}
#resultsRefCol .results-col-item.active { border-color: #60a5fa; box-shadow: 0 2px 12px rgba(96,165,250,.28); }
#resultsRefCol .results-col-item.active::after { background: #60a5fa; }

.results-slider-wrap {
  flex: 1;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  aspect-ratio: 1/1;
  border: 1px solid var(--card-border);
}
.results-slider-wrap img-comparison-slider { width: 100%; height: 100%; }
.results-slider-wrap img-comparison-slider img { width: 100%; height: 100%; object-fit: cover; }

.results-no-result {
  display: none;
  position: absolute;
  inset: 0;
  z-index: 30;
  background: rgba(14,12,26,.88);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
}
[data-theme="light"] .results-no-result {
  background: rgba(253,252,255,.88);
}
.results-no-result.show { display: flex; }
.results-no-result span { font-size: .8rem; color: var(--subtle); font-weight: 600; letter-spacing: .04em; }


/* ═══════════════════════════════════════════════════════
   §  MF2K Dataset
═══════════════════════════════════════════════════════ */
.dataset-hero-wrap {
  width: 100%;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  margin-bottom: 1.4rem;
  border: 1px solid var(--card-border);
}
.dataset-hero-wrap img { width: 100%; }

.dataset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: .9rem;
}

.magnifier-wrap {
  position: relative;
  overflow: visible;
  border-radius: var(--radius-sm);
  cursor: crosshair;
  box-shadow: var(--shadow-sm);
  aspect-ratio: 1/1;
  border: 1px solid var(--card-border);
  transition: box-shadow .2s;
}
.magnifier-wrap:hover { box-shadow: var(--card-shadow); }
.magnifier-wrap img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-sm); }

.magnifier-lens {
  display: none;
  position: absolute;
  width: 82px;
  height: 82px;
  border-radius: 50%;
  border: 2px solid var(--accent-soft);
  box-shadow: 0 3px 16px rgba(124,106,247,.4);
  pointer-events: none;
  overflow: hidden;
  transform: translate(-50%, -50%);
  z-index: 100;
}
.magnifier-wrap:hover .magnifier-lens { display: block; }
.magnifier-lens canvas { display: block; border-radius: 50%; }


/* ═══════════════════════════════════════════════════════
   §  BibTeX
═══════════════════════════════════════════════════════ */
.bibtex-block {
  max-width: 1060px;
  scrollbar-width: thin;
  scrollbar-color: var(--subtle) transparent;
}

.bibtex-block::-webkit-scrollbar { height: 4px; }
.bibtex-block::-webkit-scrollbar-thumb { background: var(--subtle); border-radius: 2px; }

/* Wrapper gives us a relative context for the absolutely-positioned copy button */
.bibtex-pre-wrap {
  position: relative;
}

.bibtex-pre {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  /* extra top padding so code text doesn't sit under the copy button */
  padding: 2.8rem 1.1rem 1rem;
  font-family: var(--font-mono);
  font-size: .86rem;
  line-height: 1.7;
  color: var(--text-2);
  overflow-x: auto;
  white-space: pre;
  backdrop-filter: blur(12px);
}

/* Copy button — pinned to top-right corner of the pre block */
.bibtex-copy-btn {
  position: absolute;
  top: .65rem;
  right: .75rem;
  display: inline-flex;
  align-items: center;
  gap: .38rem;
  font-size: .82rem;
  font-weight: 600;
  color: var(--accent-soft);
  background: var(--accent-glow2);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: .3rem .75rem;
  cursor: pointer;
  transition: all .17s;
  font-family: var(--font-body);
  z-index: 5;
  white-space: nowrap;
}
.bibtex-copy-btn:hover {
  background: var(--accent-glow);
  border-color: var(--accent-soft);
  color: #fff;
}
.bibtex-copy-btn svg { width: 13px; height: 13px; stroke-width: 2; }

/* Hide old actions wrapper if still present */
.bibtex-actions { display: none; }


/* ═══════════════════════════════════════════════════════
   Footer
═══════════════════════════════════════════════════════ */
.site-footer {
  background: var(--card-bg);
  border-top: 1px solid var(--card-border);
  padding: 2.2rem 2rem;
  text-align: center;
  font-size: .84rem;
  color: var(--muted);
  line-height: 1.7;
  position: relative;
  z-index: 1;
  backdrop-filter: blur(12px);
}
.site-footer a { color: var(--accent-soft); }


/* ═══════════════════════════════════════════════════════
   Toast
═══════════════════════════════════════════════════════ */
#toastContainer {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}
.toast {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: .7rem 1.2rem;
  font-size: .88rem;
  color: var(--text-2);
  pointer-events: auto;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(-12px);
  transition: opacity .3s ease, transform .3s ease;
}
.toast.show {
  opacity: 1;
  transform: translateY(0);
}
.toast.hide {
  opacity: 0;
  transform: translateY(-12px);
}


/* ═══════════════════════════════════════════════════════
   3D CAROUSEL  —  perspective coverflow
═══════════════════════════════════════════════════════ */

/* Scene: full-width container, perspective applied here */
.carousel3d-scene {
  position: relative;
  width: 100%;
  padding: 2.5rem 0 3rem;
  perspective: 1400px;
  perspective-origin: 50% 40%;
  overflow: visible;
}

/* Stage: keep height tighter since active card no longer scales up */
.c3d-stage {
  position: relative;
  width: 100%;
  height: 800px;
  transform-style: preserve-3d;
}

/* Each card is absolutely centred on the stage */
.c3d-card {
  position: absolute;
  top: 0;
  width: 540px;
  left: 50%;
  margin-left: -230px;
  transition:
    transform 0.56s cubic-bezier(0.4, 0, 0.2, 1),
    opacity   0.56s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  will-change: transform, opacity;
  transform-origin: center center;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

/* Pointer events only on active / adjacent cards */
.c3d-card.is-hidden { pointer-events: none; }

/* compare-group inside a 3D card fills the card */
.c3d-card .compare-group {
  height: 100%;
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 18px 48px rgba(0,0,0,.22);
  border-radius: var(--radius-lg);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-sizing: border-box;
  transition:
    box-shadow 0.32s ease,
    border-color 0.32s ease,
    background-color 0.32s ease;
}

/* Active card is highlighted by border/shadow instead of scale */
.c3d-card.is-active .compare-group {
  border-color: rgba(255,255,255,.18);
  box-shadow:
    0 28px 72px rgba(0,0,0,.30),
    0 0 0 1px rgba(255,255,255,.05) inset;
}

/* Side cards slightly dimmer */
.c3d-card.is-side .compare-group {
  box-shadow: 0 14px 34px rgba(0,0,0,.20);
}

.c3d-card .group-main-slider {
  flex: 1;
  min-height: 0;
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transform: translateZ(0);
}

.c3d-card .group-main-slider img-comparison-slider,
.c3d-card .group-main-slider img-comparison-slider img {
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transform: translateZ(0);
}

.c3d-card .group-main-slider img-comparison-slider img {
  object-fit: cover;
}

/* Navigation arrows */
.c3d-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color .2s, box-shadow .2s, transform .2s;
  color: var(--text-2);
}
.c3d-btn svg { width: 18px; height: 18px; }
.c3d-btn:hover {
  border-color: var(--accent-soft);
  box-shadow: 0 4px 20px var(--accent-glow);
  transform: translateY(calc(-50% - 2px));
  color: var(--text);
}
.c3d-btn:disabled { opacity: .25; pointer-events: none; }
.c3d-prev { left: calc(50% - 310px); }
.c3d-next { right: calc(50% - 310px); }

/* Dot indicators */
.c3d-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 1.2rem;
  position: relative;
  z-index: 10;
}
.c3d-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--subtle);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background .2s, transform .2s;
}
.c3d-dot.active {
  background: var(--accent);
  transform: scale(1.5);
}