/* ==========================================================================
   GSI-Bench Project Page — styled to match the paper's pastel palette.
   Palette sampled from the main teaser figure:
     pink  #f0c0c0   cream  #f0e6b5   cyan  #cfeaea   green  #d8ecc8
     lavender #d8d8f0  warm brown #a87860
   ========================================================================== */

:root {
  --pink:      #f7d3d3;
  --pink-2:    #f0c0c0;
  --cream:     #f7ecc5;
  --cream-2:   #f0d890;
  --cyan:      #d6ecec;
  --cyan-2:    #b7dcdc;
  --green:     #dcecc7;
  --green-2:   #bcd89f;
  --lav:       #e0e0f2;
  --lav-2:     #bcbce4;
  --warm:      #a87860;
  --warm-dark: #7c5542;
  --ink:       #262626;
  --ink-soft:  #4a4a4a;
  --muted:     #6c6c6c;
  --line:      #e8e4de;
  --bg:        #fbf8f3;
  --card:      #ffffff;
  --accent:    #b66a5b;           /* matches warm accent used in figure captions */
  --accent-2:  #7b8cc4;           /* soft blue from evaluation chart */
  --shadow:    0 10px 32px -18px rgba(80, 55, 40, 0.28);
  --shadow-sm: 0 4px 14px -8px rgba(80, 55, 40, 0.25);
  --radius:    18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", "Helvetica Neue", Arial, "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--warm-dark); text-decoration: underline; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.narrow    { max-width: 900px; margin: 0 auto; padding: 0 24px; }

/* ----------------------------------------------------------- Hero */
.hero {
  position: relative;
  padding: 64px 0 40px;
  background:
    radial-gradient(1200px 540px at 85% -10%, rgba(240,192,192,0.55), transparent 60%),
    radial-gradient(900px 500px at 10% 10%, rgba(214,236,236,0.6), transparent 60%),
    radial-gradient(800px 500px at 50% 120%, rgba(247,236,197,0.6), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--line);
}

.venue {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 14px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--warm-dark);
  border-radius: 999px;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  box-shadow: var(--shadow-sm);
}
.venue .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

h1.title {
  font-size: clamp(28px, 3.6vw, 46px);
  line-height: 1.18;
  margin: 22px 0 6px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

h1.title .hl {
  background: linear-gradient(180deg, transparent 62%, var(--cream) 62%);
  padding: 0 4px;
}

.subtitle {
  color: var(--muted);
  font-size: 17px;
  margin: 6px 0 28px;
}

.authors {
  font-size: 16.5px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}
.authors .equal, .authors .corr { color: var(--accent); font-weight: 600; }
.authors .name { white-space: nowrap; }

.affiliations {
  font-size: 14.5px;
  color: var(--muted);
  margin-bottom: 28px;
}

.badges {
  display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px;
}
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px;
  background: var(--ink);
  color: #fff;
  border-radius: 999px;
  font-weight: 600; font-size: 14px;
  box-shadow: var(--shadow-sm);
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.badge:hover { text-decoration: none; transform: translateY(-1px); background: #000; color: #fff; }
.badge.soft { background: #fff; color: var(--ink); border: 1px solid var(--line); }
.badge.soft:hover { background: var(--cream); color: var(--warm-dark); }
.badge svg { width: 16px; height: 16px; }

/* ----------------------------------------------------------- Teaser */
.teaser {
  margin: 32px auto 0;
  max-width: 1080px;
  padding: 0 24px;
}
.teaser-wrap {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.teaser-wrap img { width: 100%; display: block; border-radius: 12px; }
.teaser-cap {
  font-size: 14.5px; color: var(--ink-soft);
  margin: 14px 6px 2px; line-height: 1.55;
}
.teaser-cap b { color: var(--ink); }

/* ----------------------------------------------------------- Sections */
section { padding: 64px 0; }
section.tight { padding: 44px 0; }
section + section { border-top: 1px dashed var(--line); }

h2.section-title {
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
  display: inline-flex; align-items: center; gap: 12px;
}
h2.section-title::before {
  content: "";
  width: 10px; height: 22px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--pink-2), var(--cream-2));
}
.section-sub {
  color: var(--muted);
  margin: 0 0 28px;
  font-size: 15.5px;
}

.lead { font-size: 17px; color: var(--ink-soft); line-height: 1.75; }
.lead b, .lead strong { color: var(--ink); }

/* ----------------------------------------------------------- Highlights */
.highlights {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 24px;
}
.hcard {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 20px 18px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.hcard::before {
  content: "";
  position: absolute; inset: 0 0 auto 0; height: 6px;
  background: var(--pink);
}
.hcard:nth-child(2)::before { background: var(--cream); }
.hcard:nth-child(3)::before { background: var(--cyan); }
.hcard:nth-child(4)::before { background: var(--green); }
.hcard h3 {
  font-size: 16px; margin: 4px 0 4px; letter-spacing: 0.02em;
  text-transform: uppercase; color: var(--warm-dark);
}
.hcard .num {
  font-size: 30px; font-weight: 700;
  color: var(--ink); letter-spacing: -0.02em; line-height: 1.1;
}
.hcard .desc { color: var(--muted); font-size: 14.5px; margin-top: 8px; }

/* ----------------------------------------------------------- Contributions */
.contribs {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 18px;
}
.contrib {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm); display: flex; gap: 14px;
}
.contrib .ic {
  width: 42px; height: 42px; flex: 0 0 42px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: var(--warm-dark);
  background: var(--pink);
}
.contrib:nth-child(2) .ic { background: var(--cream); }
.contrib:nth-child(3) .ic { background: var(--cyan); }
.contrib:nth-child(4) .ic { background: var(--green); }
.contrib h4 { margin: 2px 0 6px; font-size: 16.5px; }
.contrib p { margin: 0; color: var(--ink-soft); font-size: 15px; line-height: 1.6; }

/* ----------------------------------------------------------- Dataset chips */
.dchips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.chip {
  padding: 7px 14px; border-radius: 999px;
  background: #fff; border: 1px solid var(--line);
  font-size: 13.5px; font-weight: 600; color: var(--warm-dark);
}
.chip.pink { background: var(--pink); border-color: transparent; }
.chip.cream { background: var(--cream); border-color: transparent; }
.chip.cyan { background: var(--cyan); border-color: transparent; }
.chip.green { background: var(--green); border-color: transparent; }
.chip.lav { background: var(--lav); border-color: transparent; }

/* ----------------------------------------------------------- Figure blocks */
.figure {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.figure img { width: 100%; display: block; border-radius: 10px; }
.figure figcaption {
  color: var(--ink-soft); font-size: 14.5px; margin-top: 14px; padding: 0 6px; line-height: 1.55;
}
.figure figcaption b { color: var(--ink); }

/* ----------------------------------------------------------- Tables */
.table-wrap {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.table-scroll { overflow-x: auto; }
table.results {
  border-collapse: collapse;
  width: 100%;
  min-width: 880px;
  font-size: 13.5px;
}
table.results caption {
  text-align: left; font-weight: 600; color: var(--ink);
  padding: 14px 18px; border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(247,211,211,0.45), rgba(247,236,197,0.45));
}
table.results th, table.results td {
  padding: 9px 11px; text-align: center;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
table.results thead th {
  background: #f7f3ec;
  color: var(--ink);
  font-weight: 600; font-size: 12.5px;
  letter-spacing: 0.02em; text-transform: uppercase;
}
table.results thead th.group {
  background: #efe8dc; color: var(--warm-dark);
}
table.results tbody tr:hover { background: #fbf6ec; }
table.results td:first-child,
table.results th:first-child { text-align: left; font-weight: 600; }
table.results td.dim { color: var(--ink-soft); font-weight: 500; }
table.results td.row-label {
  background: linear-gradient(90deg, rgba(214,236,236,0.35), transparent);
  color: var(--warm-dark);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.06em;
}
table.results td.best { color: var(--accent); font-weight: 700; }
table.results td.second { text-decoration: underline; text-decoration-color: var(--cream-2); text-underline-offset: 3px; font-weight: 600; }
table.results td.delta { color: var(--warm-dark); font-weight: 700; }
table.results tr.avg td { background: #fbf4e8; font-weight: 700; }
table.results tr.avg td.best { color: var(--accent); }

.leg {
  display: flex; flex-wrap: wrap; gap: 14px;
  font-size: 13px; color: var(--muted);
  padding: 10px 16px; border-top: 1px solid var(--line);
  background: #fbf7ee;
}
.leg .best { color: var(--accent); font-weight: 700; }
.leg .second { text-decoration: underline; text-decoration-color: var(--cream-2); text-underline-offset: 3px; font-weight: 600; }

/* ----------------------------------------------------------- Eval dims */
.dims {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  margin-top: 22px;
}
.dim {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 18px; box-shadow: var(--shadow-sm);
}
.dim .k {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  background: var(--pink); color: var(--warm-dark);
  font-weight: 700; font-size: 12px; letter-spacing: 0.06em;
}
.dim:nth-child(2) .k { background: var(--cream); }
.dim:nth-child(3) .k { background: var(--cyan); }
.dim:nth-child(4) .k { background: var(--green); }
.dim h5 { font-size: 15.5px; margin: 8px 0 4px; }
.dim p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.55; }

/* ----------------------------------------------------------- BibTeX */
.bib {
  position: relative;
  background: #1f1c18;
  border-radius: var(--radius);
  padding: 22px 22px 18px;
  color: #f0e6cf;
  font-family: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  font-size: 13.5px;
  line-height: 1.6;
  overflow-x: auto;
  box-shadow: var(--shadow);
}
.bib pre { margin: 0; white-space: pre; }
.copy-btn {
  position: absolute; top: 14px; right: 14px;
  padding: 6px 12px; font-size: 12px; font-weight: 600;
  background: #f0e6cf; color: #1f1c18;
  border: 0; border-radius: 999px; cursor: pointer;
}
.copy-btn:hover { background: var(--cream-2); }

/* ----------------------------------------------------------- Footer */
footer {
  padding: 36px 0 52px;
  border-top: 1px solid var(--line);
  background: #fbf7ee;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}
footer a { color: var(--warm-dark); }

/* ----------------------------------------------------------- Interactions */

/* Hover lift on cards / figures */
.hcard, .contrib, .dim {
  transition: transform .25s cubic-bezier(.2,.6,.2,1),
              box-shadow .25s ease,
              border-color .25s ease;
  will-change: transform;
}
.hcard:hover, .contrib:hover, .dim:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px -22px rgba(80,55,40,0.35);
  border-color: #d9d2c4;
}

.chip {
  transition: transform .2s ease, background .2s ease, color .2s ease;
}
.chip:hover { transform: translateY(-1px) scale(1.03); }

/* Figure: click-to-zoom affordance */
.figure {
  transition: transform .25s cubic-bezier(.2,.6,.2,1), box-shadow .25s ease;
}
.figure:hover { transform: translateY(-3px); box-shadow: 0 24px 48px -24px rgba(80,55,40,0.35); }
.figure img, .teaser-wrap img {
  cursor: zoom-in;
  transition: opacity .15s ease;
}
.figure img:active, .teaser-wrap img:active { opacity: 0.85; }

.figure .zoom-hint {
  position: absolute;
  top: 14px; right: 14px;
  background: rgba(31,28,24,0.72);
  color: #fff;
  font-size: 12px;
  padding: 5px 11px;
  border-radius: 999px;
  display: inline-flex; align-items: center; gap: 6px;
  letter-spacing: 0.02em;
  pointer-events: none;
  opacity: 0;
  transition: opacity .2s ease;
}
.figure { position: relative; }
.figure:hover .zoom-hint { opacity: 1; }

/* Magnifier lens */
.magnifier {
  position: absolute;
  pointer-events: none;
  width: 200px; height: 200px;
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 10px 36px rgba(0,0,0,0.35), inset 0 0 0 1px rgba(0,0,0,0.08);
  background-repeat: no-repeat;
  display: none;
  z-index: 20;
}
.figure.has-lens .lens-target { cursor: none; }

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(18, 14, 10, 0.92);
  display: none;
  align-items: center; justify-content: center;
  z-index: 1000;
  padding: 32px;
  opacity: 0;
  transition: opacity .22s ease;
}
.lightbox.open { display: flex; opacity: 1; }
.lightbox .lb-stage {
  position: relative;
  width: 100%; height: 100%;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.lightbox img {
  max-width: 100%; max-height: 100%;
  display: block;
  transform-origin: center center;
  transition: transform .2s ease;
  user-select: none;
  -webkit-user-drag: none;
  will-change: transform;
  cursor: grab;
}
.lightbox img.dragging { cursor: grabbing; transition: none; }
.lightbox .lb-close {
  position: absolute;
  top: 20px; right: 24px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.18);
  color: #fff;
  width: 44px; height: 44px; border-radius: 50%;
  font-size: 22px; line-height: 42px; text-align: center;
  cursor: pointer;
  transition: background .15s ease;
}
.lightbox .lb-close:hover { background: rgba(255,255,255,0.22); }
.lightbox .lb-caption {
  position: absolute;
  bottom: 20px; left: 50%; transform: translateX(-50%);
  color: #f0e6cf;
  background: rgba(0,0,0,0.45);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  max-width: 80%;
  text-align: center;
}
.lightbox .lb-zoom {
  position: absolute;
  bottom: 20px; right: 24px;
  display: flex; gap: 6px;
}
.lightbox .lb-zoom button {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.18);
  color: #fff;
  font-size: 18px; font-weight: 600;
  cursor: pointer;
  transition: background .15s ease;
}
.lightbox .lb-zoom button:hover { background: rgba(255,255,255,0.22); }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s cubic-bezier(.2,.6,.2,1), transform .7s cubic-bezier(.2,.6,.2,1);
}
.reveal.visible { opacity: 1; transform: none; }

/* Table column highlight on cell hover (via JS adding .col-N on td/th) */
table.results td.col-hl, table.results th.col-hl {
  background: #fbf1dc !important;
}
table.results thead th:hover { cursor: default; }

/* Badge extra hover */
.badge:hover { box-shadow: 0 14px 30px -14px rgba(80,55,40,0.5); }

/* Hero parallax-ish shimmer on title highlight */
h1.title .hl {
  background: linear-gradient(180deg, transparent 62%, var(--cream) 62%);
  transition: background .4s ease;
}
h1.title:hover .hl {
  background: linear-gradient(180deg, transparent 55%, var(--cream-2) 55%);
}

/* ----------------------------------------------------------- Responsive */
@media (max-width: 900px) {
  .highlights { grid-template-columns: repeat(2, 1fr); }
  .contribs   { grid-template-columns: 1fr; }
  .dims       { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .highlights { grid-template-columns: 1fr; }
  .dims       { grid-template-columns: 1fr; }
  h1.title { font-size: 26px; }
  section { padding: 44px 0; }
}