/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #f8f9fb;
  --bg-alt:   #f0f2f5;
  --card:     #ffffff;
  --border:   #e0e3e8;
  --text:     #1a1f2e;
  --text2:    #5a6370;
  --text3:    #8a92a0;
  --accent:   #2563eb;
  --pure:     #2563eb;
  --applied:  #7c3aed;
  --green:    #059669;
  --yellow:   #d97706;
  --red:      #dc2626;
  --font:     'Inter', system-ui, -apple-system, sans-serif;
  --mono:     'JetBrains Mono', 'Fira Code', monospace;
  --r:        8px;
}

html { font-size: 15px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
strong { font-weight: 600; }
code { font-family: var(--mono); font-size: 0.88em; color: var(--accent); }

/* ===== Containers ===== */
.narrow { max-width: 820px; margin: 0 auto; padding: 0 24px; }
.wide   { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ===== Sections ===== */
.section { padding: 56px 0; }
.section-alt { background: var(--bg-alt); }
.section h2 {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  text-align: center;
}
.section-sub {
  text-align: center;
  color: var(--text2);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

/* ===== Title Block ===== */
.title-block {
  padding: 72px 0 40px;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(37,99,235,0.06) 0%, transparent 55%);
}

.paper-title {
  font-size: 2.15rem;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.25;
  margin-bottom: 18px;
  color: #111827;
}

.authors {
  font-size: 1.05rem;
  color: var(--text);
  margin-bottom: 6px;
}
.author { font-weight: 500; }
.authors sup { font-size: 0.7em; color: var(--accent); margin-left: 1px; }

.affiliations {
  font-size: 0.85rem;
  color: var(--text2);
  margin-bottom: 24px;
}
.affiliations span { margin: 0 10px; }
.affiliations sup { color: var(--accent); }

/* Link buttons */
.link-buttons {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

.link-btn:hover {
  border-color: var(--accent);
  background: rgba(37,99,235,0.04);
  text-decoration: none;
}

.link-btn svg { opacity: 0.6; flex-shrink: 0; }

/* ===== Tab Navigation ===== */
.tab-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.tab-nav .wide {
  display: flex;
  gap: 0;
}
.tab-btn {
  padding: 12px 24px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  font-family: var(--font);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text3);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== Abstract ===== */
.abstract-text {
  font-size: 0.98rem;
  color: var(--text);
  line-height: 1.8;
  text-align: justify;
}

/* ===== Teaser Chart ===== */
.teaser-chart-wrap {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 24px 20px 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

/* ===== Leaderboard ===== */
.controls-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.search-wrap {
  position: relative;
  flex: 1;
  max-width: 260px;
}
.search-wrap svg {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text3);
}
.search-wrap input {
  width: 100%;
  padding: 8px 10px 8px 33px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.85rem;
  outline: none;
}
.search-wrap input:focus { border-color: var(--accent); }
.search-wrap input::placeholder { color: var(--text3); }

select {
  padding: 8px 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.85rem;
  cursor: pointer;
  outline: none;
}
select:focus { border-color: var(--accent); }

.table-wrap {
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow-x: auto;
  background: var(--card);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.lb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.lb-table th {
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text3);
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}
.lb-table th.sort-active { color: var(--accent); }
.lb-table th:first-child { cursor: default; }

.lb-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.lb-table tbody tr:last-child td { border-bottom: none; }
.lb-table tbody tr { transition: background 0.12s; }
.lb-table tbody tr:hover { background: rgba(37,99,235,0.03); }

.col-rank { width: 40px; text-align: center; }
.col-model { min-width: 130px; }
.col-prov { width: 88px; }
.col-num { width: 90px; text-align: right; font-family: var(--mono); font-size: 0.84rem; font-weight: 600; }
.col-bar { width: 180px; }

/* Rank badges */
.rb {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.73rem;
  font-family: var(--mono);
}
.rb-1 { background: linear-gradient(135deg,#fbbf24,#f59e0b); color: #1a1a1a; }
.rb-2 { background: linear-gradient(135deg,#cbd5e1,#94a3b8); color: #1a1a1a; }
.rb-3 { background: linear-gradient(135deg,#d97706,#b45309); color: #fff; }
.rb-n { background: rgba(0,0,0,0.05); color: var(--text3); }

.mn { font-weight: 600; font-size: 0.86rem; }
.mf { font-size: 0.68rem; color: var(--text3); font-family: var(--mono); }

.prov {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 600;
}

.acc { font-family: var(--mono); font-weight: 600; }
.c-hi { color: var(--green); }
.c-md { color: var(--yellow); }
.c-lo { color: var(--red); }

/* inline bar in table */
.ibar {
  display: flex;
  gap: 2px;
  align-items: center;
  height: 14px;
}
.ibar-seg { height: 100%; border-radius: 3px; min-width: 1px; }
.ibar-lbl { font-size: 0.6rem; font-family: var(--mono); color: var(--text3); margin-left: 4px; white-space: nowrap; }

/* ===== Track Cols ===== */
.track-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.track-heading {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 10px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.track-heading span { font-size: 0.72rem; font-weight: 400; color: var(--text3); }
.track-heading.pure { color: var(--pure); }
.track-heading.applied { color: var(--applied); }

.mini-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--card);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.mini-table th {
  padding: 7px 10px;
  font-weight: 600;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text3);
  background: var(--bg-alt);
  text-align: left;
}
.mini-table th:nth-child(3) { text-align: right; }
.mini-table td { padding: 6px 10px; border-top: 1px solid var(--border); }
.mini-table td:nth-child(3) { text-align: right; font-family: var(--mono); font-weight: 600; }
.mini-table tbody tr:hover { background: rgba(37,99,235,0.03); }

/* ===== Heatmap ===== */
.heatmap-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--card);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.heatmap-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.72rem;
}

.heatmap-table th {
  padding: 6px 6px;
  font-weight: 600;
  font-size: 0.62rem;
  color: var(--text3);
  background: var(--bg-alt);
  text-align: center;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}
.heatmap-table th:first-child { text-align: left; padding-left: 10px; min-width: 150px; }

.heatmap-table td {
  padding: 5px 4px;
  text-align: center;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.7rem;
  border-bottom: 1px solid var(--border);
}
.heatmap-table td:first-child {
  text-align: left;
  font-family: var(--font);
  font-weight: 500;
  padding-left: 10px;
  color: var(--text);
  white-space: nowrap;
}

.heatmap-table tbody tr:hover { background: rgba(0,0,0,0.02); }

.hm-divider td {
  padding: 4px 10px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text2);
  background: var(--bg-alt);
  text-align: left !important;
}

/* ===== Radar / Compare ===== */
.chip-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 20px;
}

.chip {
  padding: 5px 13px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text2);
  font-family: var(--font);
  font-size: 0.76rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}
.chip:hover { border-color: var(--text3); color: var(--text); }
.chip.on {
  border-color: var(--accent);
  background: rgba(37,99,235,0.06);
  color: var(--accent);
}

.radar-wrap {
  max-width: 580px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

/* ===== Overview Grid ===== */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 16px 0 20px;
}

.overview-card {
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--card);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.ov-header {
  padding: 10px 16px;
  font-weight: 700;
  font-size: 0.9rem;
}
.ov-header.pure { background: rgba(37,99,235,0.06); border-bottom: 1px solid rgba(37,99,235,0.12); color: var(--pure); }
.ov-header.applied { background: rgba(124,58,237,0.06); border-bottom: 1px solid rgba(124,58,237,0.12); color: var(--applied); }

.overview-card ul {
  list-style: none;
  padding: 10px 16px 14px;
}
.overview-card li {
  padding: 4px 0;
  font-size: 0.84rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.overview-card li:last-child { border-bottom: none; }
.overview-card li small { color: var(--text3); font-size: 0.78rem; }

.stats-row {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}
.stat-pill {
  padding: 6px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--text2);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.stat-pill strong { color: var(--text); font-family: var(--mono); }

/* ===== Code Blocks ===== */
.code-block {
  background: #f4f5f8;
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 16px 18px;
  margin: 10px 0 16px;
  overflow-x: auto;
  position: relative;
}
.code-block pre { margin: 0; }
.code-block code {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: #24292e;
  line-height: 1.65;
}

.cite-block { padding-right: 44px; }

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(0,0,0,0.04);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 7px;
  cursor: pointer;
  color: var(--text3);
  transition: color 0.15s;
}
.copy-btn:hover { color: var(--accent); }

/* ===== Content paragraphs ===== */
.section .narrow > p,
.section .narrow > h2 + p {
  color: var(--text2);
  font-size: 0.9rem;
  margin-bottom: 10px;
}
.section .narrow > h2 { text-align: left; }

/* ===== Footer ===== */
.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}
.site-footer p {
  font-size: 0.8rem;
  color: var(--text3);
}

/* ===== Taxonomy ===== */
.tax-tree {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding: 8px 0 0;
}

.tax-root {
  margin-bottom: 24px;
  position: relative;
}
.tax-root::after {
  content: '';
  position: absolute;
  bottom: -24px;
  left: 50%;
  width: 2px;
  height: 24px;
  background: var(--border);
}

.tax-node {
  text-align: center;
  padding: 14px 28px;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: var(--card);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.tax-node strong { display: block; font-size: 1.1rem; margin-bottom: 2px; }
.tax-node span { font-size: 0.78rem; color: var(--text2); }

.tax-node-root {
  border-color: var(--accent);
  border-width: 2px;
}

.tax-branches {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  width: 100%;
  position: relative;
}
.tax-branches::before {
  content: '';
  position: absolute;
  top: 0;
  left: 25%;
  right: 25%;
  height: 20px;
  border-left: 2px solid var(--border);
  border-right: 2px solid var(--border);
  border-top: 2px solid var(--border);
}

.tax-track {
  padding-top: 20px;
  position: relative;
}
.tax-track::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 20px;
  background: var(--border);
}

.tax-node-track {
  border-left-width: 3px;
  margin-bottom: 16px;
}
.tax-node-track.pure { border-left-color: var(--pure); }
.tax-node-track.applied { border-left-color: var(--applied); }

.tax-categories {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tax-category {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

.tax-cat-header {
  padding: 8px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}
.tax-cat-name {
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: -0.01em;
}
.tax-cat-desc {
  font-size: 0.72rem;
  color: var(--text3);
  font-style: italic;
}

.tax-tasks {
  display: flex;
  flex-direction: column;
}

.tax-task {
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.tax-task:last-child { border-bottom: none; }

.task-name {
  font-weight: 600;
  font-size: 0.82rem;
  min-width: 0;
  flex-shrink: 0;
}
.task-desc {
  color: var(--text2);
  font-size: 0.76rem;
  flex: 1;
  min-width: 0;
}
.task-meta {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text3);
  white-space: nowrap;
  flex-shrink: 0;
}
.task-eval {
  display: inline-block;
  padding: 1px 6px;
  background: var(--bg-alt);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text3);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .paper-title { font-size: 1.5rem; }
  .track-cols { grid-template-columns: 1fr; }
  .overview-grid { grid-template-columns: 1fr; }
  .col-bar { display: none; }
  .controls-bar { flex-direction: column; }
  .search-wrap { max-width: none; }
  .tax-branches { grid-template-columns: 1fr; gap: 20px; }
  .tax-branches::before { display: none; }
  .tax-track::before { display: none; }
  .tax-track { padding-top: 0; }
  .tax-task { flex-direction: column; gap: 2px; }
  .task-desc { font-size: 0.74rem; }
}

@media (max-width: 480px) {
  html { font-size: 14px; }
  .narrow, .wide { padding: 0 14px; }
  .section { padding: 40px 0; }
  .title-block { padding: 56px 0 32px; }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }