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

/* ── Design tokens ───────────────────────────────────────────── */
:root {
  --bg:             #0c0c1a;
  --bg-card:        #12122b;
  --bg-card2:       #16163a;
  --bg-deep:        #09091a;
  --bg-hover:       #1b1b3a;
  --border:         rgba(99, 179, 237, 0.10);
  --border-md:      rgba(99, 179, 237, 0.18);
  --border-strong:  rgba(99, 179, 237, 0.28);
  --text:           #e2e8f0;
  --text-muted:     #8896aa;
  --text-dim:       #505870;
  --accent:         #63b3ed;
  --accent-dim:     rgba(99, 179, 237, 0.12);
  --accent-glow:    rgba(99, 179, 237, 0.25);
  --accent-dark:    #1d4ed8;
  --purple:         #a78bfa;
  --purple-dim:     rgba(167, 139, 250, 0.12);
  --green:          #34d399;
  --green-dim:      rgba(52, 211, 153, 0.12);
  --yellow:         #fbbf24;
  --radius-xs:      4px;
  --radius-sm:      8px;
  --radius:         12px;
  --radius-lg:      16px;
  --radius-xl:      20px;
  --shadow-sm:      0 2px 8px rgba(0,0,0,0.4);
  --shadow:         0 4px 20px rgba(0,0,0,0.55);
  --shadow-lg:      0 8px 40px rgba(0,0,0,0.6);
  --transition:     0.18s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 15px;
  min-height: 100vh;
}

/* thin global scrollbar */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(99,179,237,0.2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(99,179,237,0.38); }
* { scrollbar-width: thin; scrollbar-color: rgba(99,179,237,0.2) transparent; }

/* ── Layout ──────────────────────────────────────────────────── */
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;
}

/* ── Floating TOC ────────────────────────────────────────────── */
.toc {
  position: fixed;
  right: 1.5rem;
  top: 4.5rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  pointer-events: none;
}
.toc > * { pointer-events: auto; }

.toc-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card2);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--accent);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  flex-shrink: 0;
}
.toc-toggle-btn:hover {
  background: var(--bg-hover);
  transform: scale(1.08);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.toc-toggle-btn svg { display: block; }

.toc-panel {
  background: var(--bg-card2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 1rem 0.75rem 1rem 1rem;
  width: 220px;
  max-height: calc(100vh - 9rem);
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  display: none;
  animation: toc-in 0.15s ease;
}
.toc.expanded .toc-panel { display: block; }

@keyframes toc-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.toc-heading {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-dim);
  margin-bottom: 0.65rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  padding-left: 0.25rem;
}

.toc-list, .toc-sub {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.toc-sub { margin-left: 0.6rem; margin-top: 1px; }

.toc-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.3rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}
.toc-link:hover { color: var(--accent); background: var(--accent-dim); }
.toc-link.active { color: var(--accent); background: var(--accent-dim); font-weight: 600; }

.toc-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
  opacity: 0.4;
  transition: opacity var(--transition);
}
.toc-link.active .toc-dot { opacity: 1; }
.toc-sub-link { font-size: 0.75rem; color: var(--text-dim); }

/* ── Back-to-top button ──────────────────────────────────────── */
.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 2rem;
  z-index: 200;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--bg-card2);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--accent);
  text-decoration: none;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { transform: translateY(-2px); box-shadow: 0 0 0 3px var(--accent-glow); }

/* ── Header card ─────────────────────────────────────────────── */
.report-header {
  background: linear-gradient(140deg, #0e0e28 0%, #13163a 55%, #0b1024 100%);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-xl);
  padding: 2.75rem 2.5rem 2.25rem;
  margin-bottom: 2.25rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.report-header::before {
  content: '';
  position: absolute;
  top: -60%; right: -8%;
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(99,179,237,0.08) 0%, transparent 65%);
  pointer-events: none;
}
.report-header::after {
  content: '';
  position: absolute;
  bottom: -50%; left: -5%;
  width: 350px; height: 350px;
  background: radial-gradient(circle, rgba(167,139,250,0.06) 0%, transparent 65%);
  pointer-events: none;
}
.header-inner { position: relative; z-index: 1; }

.header-eyebrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.header-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(99,179,237,0.1);
  border: 1px solid rgba(99,179,237,0.28);
  border-radius: 20px;
  padding: 0.22rem 0.9rem;
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--accent);
}
.header-badge a { color: inherit; text-decoration: none; }
.header-badge a:hover { text-decoration: underline; }

.report-title {
  font-size: 2.4rem;
  font-weight: 800;
  background: linear-gradient(130deg, #e2e8f0 30%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.75rem;
}

.meta-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}
.meta-chip {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.9rem;
  min-width: 0;
}
.meta-chip-label {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-dim);
}
.meta-chip-value {
  font-size: 0.85rem;
  color: var(--text);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 320px;
}

/* ── Section ─────────────────────────────────────────────────── */
.section { margin-bottom: 3rem; }

.section-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-md);
}
.section-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  background: var(--accent-dim);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--accent);
  flex-shrink: 0;
}
.section-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

/* ── Card ────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.card:hover { border-color: var(--border-md); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.8rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.015);
}
.card-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.card-badge {
  font-size: 0.7rem;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 20px;
  padding: 0.15rem 0.6rem;
  font-weight: 600;
  white-space: nowrap;
}

/* ── Sub-card ─────────────────────────────────────────────────── */
.sub-card {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  overflow: hidden;
}
.sub-card-header {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Chart wrap ──────────────────────────────────────────────── */
.chart-wrap { padding: 0.75rem; min-height: 350px; }
.chart-wrap > div { width: 100% !important; }

/* ── Tables ──────────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  border-radius: 0 0 var(--radius) var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  background: transparent;
}

thead tr { background: rgba(255,255,255,0.025); }

th {
  padding: 0.7rem 1.1rem;
  text-align: left;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border-md);
  white-space: nowrap;
}
td {
  padding: 0.6rem 1.1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: rgba(99,179,237,0.04); }

.score-cell {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
}
.num-cell {
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
}

/* inline tags */
.tag {
  display: inline-block;
  background: var(--purple-dim);
  color: var(--purple);
  border-radius: var(--radius-xs);
  padding: 0.08em 0.5em;
  font-size: 0.78rem;
  font-weight: 500;
}
.metric-tag {
  display: inline-block;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: var(--radius-xs);
  padding: 0.08em 0.5em;
  font-size: 0.78rem;
  font-weight: 500;
}

/* ── Dataset accordion card ──────────────────────────────────── */
.ds-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.9rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  overflow: hidden;
}
.ds-card:hover { border-color: var(--border-md); }
.ds-card[open] { border-color: var(--border-strong); box-shadow: var(--shadow); }

.ds-summary {
  padding: 0.95rem 1.25rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  user-select: none;
  background: rgba(255,255,255,0.02);
  transition: background var(--transition);
}
.ds-summary::-webkit-details-marker { display: none; }
.ds-summary:hover { background: rgba(99,179,237,0.04); }
.ds-card[open] .ds-summary { background: rgba(99,179,237,0.05); border-bottom: 1px solid var(--border); }

.ds-summary-left {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
}
.ds-arrow {
  display: flex;
  align-items: center;
  color: var(--accent);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.ds-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ds-summary-right { flex-shrink: 0; }

.score-pill {
  display: inline-block;
  padding: 0.22rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  border: 1px solid transparent;
  /* dynamic color via JS */
  background: var(--accent-dim);
  color: var(--accent);
}

.ds-body { padding: 1.25rem; }

/* ── Inner toggles (description / analysis) ──────────────────── */
.inner-toggle { margin-bottom: 0.85rem; }

.inner-toggle > summary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  list-style: none;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0.3rem 0.65rem;
  user-select: none;
  border-radius: 20px;
  border: 1px solid rgba(99,179,237,0.25);
  background: rgba(99,179,237,0.07);
  transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.inner-toggle > summary::-webkit-details-marker { display: none; }
.inner-toggle > summary:hover {
  color: #fff;
  background: rgba(99,179,237,0.18);
  border-color: rgba(99,179,237,0.5);
  box-shadow: 0 0 8px rgba(99,179,237,0.2);
}
.inner-toggle[open] > summary {
  color: #fff;
  background: rgba(99,179,237,0.15);
  border-color: rgba(99,179,237,0.45);
}

.inner-arrow {
  display: inline-flex;
  align-items: center;
  color: inherit;
  transition: transform 0.18s ease;
}

/* ── Description block ───────────────────────────────────────── */
.ds-description {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding: 1rem 1.25rem;
  background: var(--bg-deep);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent-dark);
  word-break: break-word;
  line-height: 1.75;
  margin-bottom: 0.5rem;
}
.ds-description p { margin-bottom: 0.6rem; }
.ds-description p:last-child { margin-bottom: 0; }
.ds-description ul, .ds-description ol { padding-left: 1.4rem; margin-bottom: 0.6rem; }
.ds-description li { margin-bottom: 0.2rem; }
.ds-description strong { color: var(--text); font-weight: 600; }
.ds-description em { font-style: italic; }
.ds-description code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.82rem;
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.1em 0.35em;
  color: var(--yellow);
}
.ds-description pre { background: var(--bg-hover); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.75rem 1rem; overflow-x: auto; margin-bottom: 0.6rem; }
.ds-description pre code { background: transparent; border: none; padding: 0; color: var(--text); }
.ds-description h2, .ds-description h3 { font-size: 0.9rem; font-weight: 600; color: var(--accent); margin: 1rem 0 0.35rem; border-bottom: 1px solid var(--border); padding-bottom: 0.2rem; }
.ds-description table { font-size: 0.82rem; margin-bottom: 0.6rem; background: transparent; }
.ds-description th { font-size: 0.8rem; padding: 0.4rem 0.7rem; }
.ds-description td { padding: 0.35rem 0.7rem; }
.ds-description hr { border: none; border-top: 1px solid var(--border); margin: 0.75rem 0; }

/* ── Analysis block ──────────────────────────────────────────── */
.analysis-section {
  font-size: 0.875rem;
  color: var(--text);
  padding: 1rem 1.25rem;
  background: var(--bg-deep);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--green);
  word-break: break-word;
  line-height: 1.75;
  margin-bottom: 0.5rem;
}
.analysis-section p { margin-bottom: 0.6rem; }
.analysis-section p:last-child { margin-bottom: 0; }
.analysis-section ul, .analysis-section ol { padding-left: 1.4rem; margin-bottom: 0.6rem; }
.analysis-section li { margin-bottom: 0.2rem; }
.analysis-section strong { color: var(--text); font-weight: 600; }
.analysis-section em { color: var(--text-muted); font-style: italic; }
.analysis-section code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.82rem;
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.1em 0.35em;
  color: var(--yellow);
}
.analysis-section pre { background: var(--bg-hover); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.75rem 1rem; overflow-x: auto; margin-bottom: 0.6rem; }
.analysis-section pre code { background: transparent; border: none; padding: 0; color: var(--text); }
.analysis-section h2, .analysis-section h3 { font-size: 0.9rem; font-weight: 600; color: var(--accent); margin: 1rem 0 0.35rem; border-bottom: 1px solid var(--border); padding-bottom: 0.2rem; }
.analysis-section h2:first-child, .analysis-section h3:first-child { margin-top: 0; }
.analysis-section blockquote { border-left: 3px solid var(--border-strong); margin: 0.5rem 0; padding: 0.3rem 0.85rem; color: var(--text-muted); font-style: italic; }
.analysis-section hr { border: none; border-top: 1px solid var(--border); margin: 0.75rem 0; }
.analysis-section table { font-size: 0.82rem; margin-bottom: 0.6rem; background: transparent; }
.analysis-section th { font-size: 0.8rem; padding: 0.4rem 0.7rem; }
.analysis-section td { padding: 0.35rem 0.7rem; }

/* ── Model tag ───────────────────────────────────────────────── */
.model-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-deep);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.7rem;
  margin: 0.5rem 0 0.75rem;
}

/* ── Footer ──────────────────────────────────────────────────── */
.report-footer {
  margin-top: 4rem;
  padding: 1.5rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border-top: 1px solid var(--border);
}
.report-footer a { color: var(--accent); text-decoration: none; }
.report-footer a:hover { text-decoration: underline; }

/* ── Language switcher (shared: eval + perf reports) ────────── */
.lang-switcher {
  display: flex;
  gap: 0;
  border: 1px solid var(--border-md);
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
}
.lang-btn {
  padding: 0.28rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 600;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  letter-spacing: 0.04em;
  line-height: 1.4;
}
.lang-btn:hover  { background: rgba(255,255,255,0.06); color: var(--text); }
.lang-btn.active { background: var(--accent); color: #0d1117; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 900px) {
  .report-title { font-size: 1.8rem; }
  .report-header { padding: 2rem 1.5rem 1.75rem; }
  .container { padding: 1.25rem 1rem 4rem; }
  .toc { right: 0.75rem; top: auto; bottom: 5rem; }
}
@media (max-width: 600px) {
  .report-title { font-size: 1.5rem; }
  .report-header { padding: 1.5rem 1.1rem 1.4rem; border-radius: var(--radius); }
  .meta-chip-value { max-width: 220px; }
  .ds-name { max-width: 180px; }
  .toc-panel { width: 185px; }
}
