:root{
  --bg: #ffffff;
  --bg-elev: #f7f7f9;
  --panel: #f2f3f6;
  --border: #e1e2e8;
  --text: #1a1a1e;
  --text-dim: #55575f;
  --text-faint: #85868f;
  --accent: #c97a12;
  --accent-2: #d94f2f;
  --accent-3: #2f7dd1;
  --link: #b8621a;
  --max-w: 1080px;
  --radius: 10px;
}

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Georgia", "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.sans{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

a{ color: var(--link); text-decoration: none; }
a:hover{ text-decoration: underline; }

.wrap{
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

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

.hero{
  position: relative;
  overflow: hidden;
  padding: 96px 0 56px;
  background:
    radial-gradient(600px 340px at 18% -10%, rgba(255,180,84,0.18), transparent 60%),
    radial-gradient(500px 300px at 85% 0%, rgba(127,184,255,0.10), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}

.hero::before{
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(255,180,84,0.35), rgba(255,122,89,0.08) 45%, transparent 70%);
  filter: blur(4px);
  pointer-events: none;
}

.hero::after{
  content: "";
  position: absolute;
  top: 40px;
  right: 120px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(127,184,255,0.9);
  box-shadow:
    -60px 40px 0 -3px rgba(255,180,84,0.55),
    -140px 95px 0 -5px rgba(255,122,89,0.4),
    40px -30px 0 -4px rgba(127,184,255,0.5);
  pointer-events: none;
}

h1.title{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 2.55rem;
  line-height: 1.18;
  font-weight: 700;
  margin: 0 0 22px;
  max-width: 820px;
  background: linear-gradient(100deg, var(--text) 30%, var(--accent) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.authors{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.02rem;
  color: var(--text);
  margin: 0 0 8px;
}

.authors a{ color: var(--text); border-bottom: 1px dotted var(--text-faint); }
.authors a:hover{ color: var(--accent); }

.affils{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  color: var(--text-dim);
  margin: 0 0 30px;
}

.links-row{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
}

.btn{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 9px 16px;
  border-radius: 8px;
  transition: border-color 0.15s ease, transform 0.15s ease, background 0.15s ease;
}
.btn:hover{
  text-decoration: none;
  border-color: var(--accent);
  background: var(--bg-elev);
  transform: translateY(-1px);
}
.btn.primary{
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1a1206;
  border: none;
}
.btn.primary:hover{ filter: brightness(1.06); }
.btn.disabled{
  opacity: 0.5;
  cursor: default;
  pointer-events: none;
}
.btn svg{ width: 15px; height: 15px; flex: none; }

/* ---------- Nav ---------- */

.subnav{
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.subnav .wrap{
  display: flex;
  gap: 22px;
  overflow-x: auto;
  padding-top: 12px;
  padding-bottom: 12px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.86rem;
}
.subnav a{
  color: var(--text-dim);
  white-space: nowrap;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.subnav a:hover{ color: var(--accent); text-decoration: none; }

/* ---------- Teaser ---------- */

.teaser{
  padding: 44px 0 8px;
}
.teaser figure{ margin: 0; }
.teaser img{
  width: 100%;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.video-hero video{
  width: 100%;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  aspect-ratio: 1440 / 270;
}
.col-labels{
  display: flex;
  margin-top: 6px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  color: var(--text-faint);
}
.col-labels span{
  flex: 1;
  text-align: center;
}
figcaption{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-top: 14px;
  line-height: 1.55;
  text-align: center;
}
figcaption b{ color: var(--text); }

.video-carousel{
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 320px;
  justify-content: center;
}
.viewer-dots{
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}
.viewer-dots .dot{
  width: 8px;
  height: 8px;
  padding: 6px;
  box-sizing: content-box;
  background-clip: content-box;
  border-radius: 50%;
  background-color: var(--border);
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}
.viewer-dots .dot:hover{
  background-color: var(--text-faint);
}
.viewer-dots .dot.active{
  background-color: var(--accent);
  transform: scale(1.3);
}

.video-row{
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}
.video-box{
  flex: 0 0 auto;
}
.video-frame{
  position: relative;
  height: 260px;
  width: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.video-box.aspect-portrait .video-frame{ aspect-ratio: 9 / 16; }
.video-box.aspect-landscape .video-frame{ height: 130px; aspect-ratio: 16 / 9; }
.video-box.aspect-wide{ flex: 1 1 auto; max-width: 100%; }
.video-box.aspect-wide .video-frame{ width: 100%; height: auto; aspect-ratio: 1920 / 276; }
.video-carousel.wide{ min-height: 0; }
.video-box.active .video-frame{
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(201,122,18,0.15);
}
.video-frame video{
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}
.video-box-label{
  display: block;
  margin-top: 8px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.video-box.active .video-box-label{
  color: var(--accent);
  font-weight: 600;
}
.video-arrow{
  flex: none;
  align-self: center;
  margin-top: -22px;
  font-size: 1.3rem;
  color: var(--text-faint);
}

/* ---------- Video hover controls ---------- */

.video-controls-wrap{
  position: relative;
}
div.video-controls-wrap{
  overflow: hidden;
  border-radius: 8px;
}
.video-controls{
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: linear-gradient(to top, rgba(0,0,0,0.55), transparent);
  opacity: 0;
  transition: opacity 0.15s ease;
  pointer-events: none;
}
.video-controls-wrap:hover .video-controls,
.video-controls-wrap.controls-visible .video-controls{
  opacity: 1;
  pointer-events: auto;
}
.video-play-btn{
  flex: none;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.92);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  padding: 0;
}
.video-play-btn svg{
  width: 13px;
  height: 13px;
  fill: #1a1a1e;
}
.video-play-btn .icon-play{ display: none; }
.video-controls-wrap.is-paused .video-play-btn .icon-play{ display: block; }
.video-controls-wrap.is-paused .video-play-btn .icon-pause{ display: none; }
.video-seek{
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,0.35);
  border-radius: 2px;
  cursor: pointer;
}
.video-seek-fill{
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 2px;
}

/* ---------- Decomposition draft review ---------- */

.decomp-list{
  display: flex;
  flex-direction: column;
  gap: 26px;
  margin-top: 26px;
}
.decomp-item{
  margin: 0;
}
.decomp-item video{
  width: 100%;
  display: block;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  aspect-ratio: 1920 / 276;
}
.decomp-item video.novelview{
  aspect-ratio: 1440 / 270;
}
.decomp-item figcaption{
  margin-top: 8px;
  text-align: left;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.8rem;
  color: var(--text-faint);
}

/* ---------- Sections ---------- */

section{
  padding: 56px 0;
  border-bottom: 1px solid var(--border);
}
section:last-of-type{ border-bottom: none; }

.section-label{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-3);
  margin: 0 0 10px;
  font-weight: 700;
}

h2{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.65rem;
  margin: 0 0 20px;
  color: var(--text);
}

h3{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.18rem;
  margin: 34px 0 12px;
  color: var(--text);
}

p{ color: var(--text-dim); margin: 0 0 16px; }
p:last-child{ margin-bottom: 0; }

.lead{
  font-size: 1.12rem;
  color: var(--text);
}

.abstract-panel{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px;
}

figure.fig{
  margin: 30px 0;
}
figure.fig img{
  width: 100%;
  display: block;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  cursor: zoom-in;
}
figure.fig.small img{ background: transparent; }

.qual-fig img{
  border-radius: 0;
  border-top: none;
  border-bottom: none;
}
.qual-table{
  width: 100%;
  table-layout: fixed;
  border-collapse: collapse;
  border: 1px solid var(--border);
  margin: 0 0 14px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
}
.qual-table th, .qual-table td{
  text-align: center;
  padding: 5px 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-dim);
  font-weight: 400;
  border: none;
}
.qual-table th{
  color: var(--text);
  font-weight: 600;
  background: var(--bg-elev);
}
.qual-labels{
  margin-bottom: 0;
}
.qual-table td.best{
  color: var(--accent);
  font-weight: 700;
}

.two-col{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
}
.two-col figure{ margin: 0; }

.three-col{
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  justify-content: center;
  gap: 18px;
  align-items: flex-start;
}
.three-col figure{ margin: 0; flex-shrink: 0; }
.three-col > img{ flex-shrink: 0; }
figure.fig.fig-h150 img{
  width: auto;
  height: 150px;
  max-width: none;
  margin: 0 auto;
  flex-shrink: 0;
}
figure.fig.fig-h200 img{
  width: auto;
  height: 200px;
  max-width: none;
  margin: 0 auto;
  flex-shrink: 0;
}
.three-col .col-divider{
  align-self: stretch;
  width: 1px;
  flex-shrink: 0;
  background: var(--border);
}

.badge{
  display: inline-block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border-radius: 5px;
  background: rgba(255,180,84,0.12);
  color: var(--accent);
  border: 1px solid rgba(255,180,84,0.35);
}

/* ---------- Tables ---------- */

.table-wrap{
  overflow-x: auto;
  margin: 22px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
table{
  border-collapse: collapse;
  width: 100%;
  min-width: 720px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.86rem;
}
thead th{
  text-align: left;
  padding: 10px 14px;
  background: var(--bg-elev);
  color: var(--text-dim);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
tbody td{
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  white-space: nowrap;
}
tbody tr:last-child td{ border-bottom: none; }
tbody tr:hover{ background: rgba(0,0,0,0.025); }
td.best{ color: var(--accent); font-weight: 700; }
td.second{ color: var(--accent-3); font-weight: 600; }
td.row-group{ color: var(--text); font-weight: 700; background: rgba(0,0,0,0.025); }

.metrics-centered th:not(:first-child),
.metrics-centered td:not(:first-child){
  text-align: center;
}

.layout-table{
  width: 100%;
  min-width: 0;
  table-layout: fixed;
  border-collapse: collapse;
  margin: 22px 0;
}
.layout-table td{
  vertical-align: top;
  padding: 0;
  white-space: normal;
  border-bottom: none;
}
.layout-table td:first-child{
  width: 44%;
  padding-right: 28px;
}
.layout-table td:last-child{
  width: 56%;
}
.layout-table p{ margin: 0; }
.layout-table img{
  width: 100%;
  display: block;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  cursor: zoom-in;
}
.layout-table figcaption{
  margin-top: 10px;
  font-size: 0.82rem;
}

/* ---------- Tags / pills for method blocks ---------- */

.pill-row{
  display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0 4px;
}
.pill{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
}

/* ---------- Limitations ---------- */

.limit-list{
  margin: 18px 0 0;
  padding-left: 22px;
  color: var(--text-dim);
}
.limit-list li{
  margin-bottom: 14px;
}
.limit-list li:last-child{ margin-bottom: 0; }

/* ---------- BibTeX ---------- */

.bibtex-box{
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.bibtex-box pre{
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.6;
}
.copy-btn{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
}
.copy-btn:hover{ color: var(--accent); border-color: var(--accent); }

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

footer{
  padding: 40px 0 70px;
}
footer .wrap{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.82rem;
  color: var(--text-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Lightbox ---------- */

.lightbox{
  position: fixed;
  inset: 0;
  background: rgba(4,5,7,0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 40px;
  cursor: zoom-out;
}
.lightbox.open{ display: flex; }
.lightbox img{
  max-width: 100%;
  max-height: 100%;
  border-radius: 6px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

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

@media (max-width: 760px){
  .hero{ padding: 72px 0 40px; }
  h1.title{ font-size: 1.9rem; }
  .video-row{ flex-direction: column; }
  .video-box{ width: 100%; }
  .video-frame{ height: auto; width: 100%; }
  .video-box.aspect-portrait .video-frame{ aspect-ratio: 9 / 16; }
  .video-box.aspect-landscape .video-frame{ aspect-ratio: 16 / 9; }
  .video-arrow{ margin-top: 0; transform: rotate(90deg); }
  .two-col{ grid-template-columns: 1fr; }
  .layout-table, .layout-table tbody, .layout-table tr, .layout-table td{ display: block; width: 100%; }
  .layout-table td:first-child{ padding-right: 0; margin-bottom: 16px; }
  body{ font-size: 16px; }
  section{ padding: 40px 0; }
}