:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --card: #ffffff;
  --muted: #4b5563;
  --text: #0f172a;
  --accent: #0284c7;
  --accent-2: #dc2626;
  --link: #1d4ed8;
  --border: rgba(2,6,23,0.08);
  --maxw: 1100px;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(2,6,23,.06);
  --nav-h: 48px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* Top nav */
.nav { position: sticky; top: 0; z-index: 50; backdrop-filter: blur(10px); background: rgba(255,255,255,0.8); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav a.brand { font-weight: 800; letter-spacing: .5px; color: var(--text); }
.nav .links { display: flex; gap: 18px; font-weight: 600; }
.nav .links a { color: var(--text); } /* make nav links black */
.nav .links a:hover { color: var(--accent); }
.nav .links a.active { color: var(--accent); }

/* Hero */
.hero { padding: 64px 0 26px; text-align: center; }
.title { font-size: clamp(28px, 4.5vw, 54px); line-height: 1.08; margin: 0 0 10px; font-weight: 800; }
.subtitle { display:none; } /* removed */
.authors { color: var(--muted); margin: 8px 0 4px; }
.affils { color: var(--muted); font-size: 15px; }
.star {
 color: #111;
  font-weight: bold;
  margin-left: 2px;
  cursor: help;
}
.equal-note {
  font-size: 0.9em;
  color: #777;
  margin-top: -6px;
}

/* Badges with icons */
.badges { margin: 22px 0 4px; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-radius: 999px; background: #eef2ff; color: #1e293b;
  border: 1px solid var(--border); box-shadow: var(--shadow); font-weight: 700;
}
.badge .icon { display:inline-block; }
.badge .coming-soon { font-weight: 500; font-size: 0.85em; color: var(--muted); margin-left: 4px; }
.badge:hover { transform: translateY(-1px); transition: .15s ease; text-decoration: none; }

/* Teaser */
.teaser { margin: 28px auto 48px; border-radius: var(--radius); overflow: hidden;
          box-shadow: var(--shadow); border: 1px solid var(--border); background: var(--bg-soft); }
.teaser img {
  width: 100%;
  height: auto;      /* ← prevents stretching */
  display: block;
}

/* Sections */
section { padding: 28px 0; }
section[id] { scroll-margin-top: calc(var(--nav-h)); }
h2.section-title { font-size: 26px; margin: 0 0 12px; border-left: 4px solid var(--accent); padding-left: 10px; }
p { margin: 10px 0; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.small-note { opacity:.7; font-size: 14px; margin-top:8px; text-align:center; }

/* Grid */
.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .grid.cols-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 680px) { .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; } }
.grid img { width: 100%; border-radius: 12px; display: block; border: 1px solid var(--border); }
.thumb-caption { padding-top:8px; color: var(--muted); font-size:14px; }

/* Figure */
figure { margin: 0; }
figcaption { color: var(--muted); font-size: 14px; margin-top: 8px; }

/* Code */
pre { background: #f8fafc; color: #0f172a; overflow-x: auto; padding: 14px; border-radius: 10px; border: 1px solid var(--border); }
code { font-family: "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; }

/* Footer */
footer { color: var(--muted); font-size: 14px; padding: 26px 0 50px; text-align: center; border-top: 1px solid var(--border); background: var(--bg-soft); }

/* Small helpers */
.pill { display: none; } /* remove equal contribution pill */
.center { text-align: center; }

/* Full-width method image */
.method-full {
  width: 100%;
  margin-bottom: 24px;
}

.method-full img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  object-fit: contain; /* preserves original aspect ratio */
}

/* Optional: keep pipeline text centered like other sections */
.method-text {
  max-width: 900px;
  margin: 0 auto;
}

/* One unified card */
.card.method-merged {
  padding: 24px;
}

/* Remove separate-card look on the overview image */
.method-overview {
  margin: 0;
  padding: 0;
  border: none;
  box-shadow: none;
  background: transparent;
}
.method-overview img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}
.method-overview figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 15px;
}

/* Subheading style */
.method-subtitle {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

/* Pipeline layout inside same card */
.pipeline-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 12px;
}
/* Pastel backgrounds for pipeline blocks */
.pipeline-block {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: none;
  color: var(--text);
}

/* Soft pastel themes */
.pastel-1 {
  background: #fdecef;  /* light pink */
}

.pastel-2 {
  background: #e8f4fd;  /* light baby blue */
}

.pastel-3 {
  background: #f3fce8;  /* light mint green */
}

.pastel-4 {
  background: #fff7e6;  /* light warm peach */
}

/* Optional: softer hover effect */
.pipeline-block:hover {
  transform: translateY(-2px);
  transition: 0.2s ease;
}

@media (max-width: 780px) {
  .pipeline-grid {
    grid-template-columns: 1fr;
  }
}

/* Subsection heading */
.subsection-title { font-size: 20px; font-weight: 600; margin: 16px 0 8px; }

/* Image zoom card hover */
.zoomable a { display:block; }
.zoomable img { transition: transform .2s ease; }
.zoomable:hover img { transform: scale(1.01); }

/* Table wrapper for mobile scrolling */
.table-wrap { padding: 16px; overflow-x: auto; }
.table-title { font-weight: 700; margin-bottom: 8px; }
.table-note { color: var(--muted); font-size: 13px; margin-top: 6px; }

/* Pretty, compact tables */
.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.results-table thead th {
  text-align: left;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  padding: 10px 8px;
  position: sticky; top: 0; /* keeps header visible when horizontally scrolling */
}
.results-table td {
  border-bottom: 1px solid var(--border);
  padding: 10px 8px;
  white-space: nowrap; /* keeps cells compact on narrow screens (scrolls horizontally) */
}
.results-table tbody tr:hover { background: rgba(2,6,23,0.03); }
.results-table strong { color: var(--text); }

/* Full-width qualitative image section */
.qualitative-full {
  width: 100%;
  margin: 0 auto 24px auto;
}

.qualitative-full .card {
  width: 100%;
  padding: 0;
}

.qualitative-full img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
}

.result-placeholder {
  padding: 20px;
  text-align: center;
  min-height: 120px;
}

.muted {
  color: var(--muted);
}

/* Full-width qualitative image blocks */
.qualitative-fullrow {
  width: 100%;
  margin: 0 auto 24px auto;
  padding: 0;
}

.qualitative-fullrow img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
}

.table-caption {
  text-align: center;
  font-size: 14px;
  color: var(--muted);
  margin-top: 6px;
}

/* Card + caption above */
.table-group {
  margin-bottom: 28px;
}

.table-caption-top {
  text-align: center;
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 6px;
}

/* Table styling */
.table-wrap {
  padding: 16px;
  overflow-x: auto;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.results-table thead th {
  text-align: left;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  padding: 10px 8px;
}

.results-table td {
  border-bottom: 1px solid var(--border);
  padding: 10px 8px;
}

.results-table tbody tr:hover {
  background: rgba(2,6,23,0.03);
}
.table-group { display: flex; flex-direction: column; }
.table-group .table-wrap { flex: 1; }

/* Full-width, correctly fitted diffusion image */
.diffusion-figure {
  width: 100%;
  margin: 0 auto 24px auto;
  padding: 0;
}

.diffusion-figure img {
  width: 100%;
  height: auto;      /* preserves aspect ratio */
  display: block;
  border-radius: var(--radius);
}

.crowded-grid figure {
  margin-bottom: 32px;
}

.crowded-grid .grasp-viewer {
  width: 100%;
  height: 420px;   /* adjust for good aspect ratio */
}