/* Analytics (/analytics) mirrors tokenzhang.com's restrained academic page. */
.analytics-shell {
  --analytics-ink: #f4f7fc;
  --analytics-ink-soft: #d5dce8;
  --analytics-muted: #aeb8ca;
  --analytics-accent: #a8c2ff;
  --analytics-accent-soft: #243352;
  --analytics-bg: #10161f;
  --analytics-bg-band: #1a222f;
  --analytics-line: #3a465a;
  --analytics-line-strong: #556378;
  --analytics-radius: 10px;
  --analytics-container: 68rem;
  --analytics-gutter: 1.25rem;
  --analytics-topbar-height: 4.2rem;
  min-height: 100dvh;
  color: var(--analytics-ink);
  background:
    radial-gradient(1100px 520px at 8% -8%, rgb(110 145 210 / 0.07), transparent 55%),
    radial-gradient(900px 480px at 92% 0%, rgb(70 100 160 / 0.05), transparent 50%),
    radial-gradient(700px 420px at 50% 110%, rgb(40 70 120 / 0.04), transparent 55%),
    var(--analytics-bg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro SC", system-ui,
    "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  transition: color 0.28s ease, background-color 0.28s ease;
}

html.light .analytics-shell {
  --analytics-ink: #131c28;
  --analytics-ink-soft: #3d4756;
  --analytics-muted: #68738a;
  --analytics-accent: #1d4fd7;
  --analytics-accent-soft: #eef3fd;
  --analytics-bg: #ffffff;
  --analytics-bg-band: #f5f7fa;
  --analytics-line: #e3e8ef;
  --analytics-line-strong: #cbd3dd;
  background: var(--analytics-bg);
}

.analytics-shell h1,
.analytics-shell h2 {
  line-height: 1.25;
  text-wrap: balance;
}

.analytics-shell :focus-visible {
  outline: 2px solid var(--analytics-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.analytics-top-bar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 60;
  height: var(--analytics-topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: 1rem;
  pointer-events: none;
}

.analytics-top-bar > * {
  pointer-events: auto;
}

.analytics-top-bar-left,
.analytics-top-bar-right {
  display: inline-flex;
  align-items: center;
}

.analytics-theme-switch {
  width: 2.7rem;
  height: 2.7rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--analytics-ink);
  cursor: pointer;
  line-height: 1;
  box-shadow: none;
  transition: color 0.15s ease, transform 0.15s ease, opacity 0.15s ease;
}

.analytics-theme-switch:hover {
  color: var(--analytics-ink-soft);
  transform: scale(1.06);
}

.analytics-theme-switch:active {
  transform: scale(0.96);
}

.analytics-theme-switch svg {
  width: 22px;
  height: 22px;
  transition: transform 0.35s ease, opacity 0.2s ease;
}

.analytics-theme-switch:hover svg {
  transform: rotate(24deg);
}

.analytics-page {
  min-height: 100dvh;
  padding: calc(var(--analytics-topbar-height) + 0.5rem) 0 4rem;
}

.analytics-container {
  box-sizing: border-box;
  width: min(100% - (var(--analytics-gutter) * 2), var(--analytics-container));
  max-width: 100%;
  margin-inline: auto;
  display: grid;
  gap: 2.5rem;
  overflow-wrap: break-word;
}

.analytics-head h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.analytics-sub {
  margin-top: 0.55rem;
  max-width: 40rem;
  color: var(--analytics-muted);
  font-size: 0.92rem;
}

.analytics-home {
  color: var(--analytics-ink-soft);
  font-size: 0.9rem;
  text-decoration: none;
  white-space: nowrap;
  padding: 0.35rem 0.2rem;
}

.analytics-home:hover {
  color: var(--analytics-ink);
}

.analytics-error {
  margin: -1rem 0 0;
  padding: 0.65rem 0;
  border-top: 1px solid var(--analytics-line-strong);
  border-bottom: 1px solid var(--analytics-line-strong);
  color: var(--analytics-ink-soft);
  font-size: 0.92rem;
}

.analytics-error code {
  font-family: var(--font-mono);
  font-size: 0.86em;
}

.analytics-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem 1.5rem;
  padding: 0.15rem 0 0.35rem;
  border-top: 2px solid var(--analytics-ink);
  border-bottom: 1px solid var(--analytics-line);
}

.analytics-metrics > div {
  display: grid;
  gap: 0.35rem;
  min-width: 0;
}

.analytics-metrics dt {
  color: var(--analytics-muted);
  font-size: 0.8rem;
}

.analytics-metrics dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
  color: var(--analytics-ink);
}

.analytics-section-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  border-bottom: 2px solid var(--analytics-ink);
  padding-bottom: 0.7rem;
  margin-bottom: 1.15rem;
}

.analytics-section-head h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.analytics-section-head-meta {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.analytics-aside {
  font-size: 0.8rem;
  color: var(--analytics-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.analytics-note {
  margin: 0;
  color: var(--analytics-muted);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

.analytics-range {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.65rem 1rem;
  margin: -0.35rem 0 1rem;
}

.analytics-range-field {
  display: grid;
  gap: 0.25rem;
  font-size: 0.78rem;
  color: var(--analytics-muted);
}

.analytics-range-input {
  box-sizing: border-box;
  min-width: 9.5rem;
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--analytics-line);
  border-radius: var(--analytics-radius);
  background: var(--analytics-bg-band);
  color: var(--analytics-ink);
  font: inherit;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color-scheme: inherit;
}

html.light .analytics-range-input {
  background: var(--analytics-bg);
}

.analytics-range-input:hover {
  border-color: var(--analytics-line-strong);
}

.analytics-range-input:focus {
  outline: none;
  border-color: var(--analytics-accent);
  box-shadow: 0 0 0 3px var(--analytics-accent-soft);
}

.analytics-range-reset {
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--analytics-line);
  border-radius: var(--analytics-radius);
  background: transparent;
  color: var(--analytics-ink-soft);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
}

.analytics-range-reset:hover {
  border-color: var(--analytics-line-strong);
  color: var(--analytics-ink);
}

.analytics-range-hint {
  align-self: center;
  margin-left: auto;
  color: var(--analytics-muted);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.analytics-legend {
  display: flex;
  gap: 0.9rem;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.78rem;
  color: var(--analytics-muted);
  font-family: var(--font-mono);
}

.analytics-legend li {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.analytics-swatch {
  width: 0.55rem;
  height: 0.55rem;
  display: inline-block;
  background: var(--analytics-accent);
}

.analytics-swatch--pv {
  opacity: 0.3;
}

.analytics-chart {
  width: 100%;
  height: auto;
  display: block;
}

.analytics-chart-bar-pv {
  fill: var(--analytics-accent);
  opacity: 0.28;
}

.analytics-chart-bar-uv {
  fill: var(--analytics-accent);
}

.analytics-chart-axis {
  stroke: var(--analytics-line-strong);
  stroke-width: 1;
}

.analytics-chart-tick {
  fill: var(--analytics-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.analytics-map-frame {
  overflow: hidden;
  border: 1px solid var(--analytics-line);
}

.analytics-map-svg {
  width: 100%;
  height: auto;
  display: block;
}

.analytics-map-ocean {
  fill: #16202e;
}

.analytics-map-land path {
  fill: #2a3547;
}

html.light .analytics-map-ocean {
  fill: #b7c9de;
}

html.light .analytics-map-land path {
  fill: #dde7f1;
}

#analytics-heat-gradient stop {
  stop-color: var(--analytics-accent);
}

.analytics-heat-blob {
  fill: url(#analytics-heat-gradient);
}

.analytics-heat-core {
  fill: var(--analytics-accent);
  opacity: 0.8;
}

.analytics-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.5rem 3rem;
  align-items: start;
}

.analytics-section--wide {
  grid-column: 1 / -1;
}

.analytics-table-scroll {
  overflow-x: auto;
}

.analytics-breakdown {
  display: grid;
}

.analytics-table {
  width: 100%;
  min-width: 23rem;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.analytics-table th,
.analytics-table td {
  text-align: left;
  padding: 0.55rem 0.35rem;
  border-bottom: 1px solid var(--analytics-line);
  vertical-align: top;
}

.analytics-table th {
  font-size: 0.8rem;
  color: var(--analytics-muted);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.analytics-table td {
  color: var(--analytics-ink-soft);
}

.analytics-table tr:last-child td {
  border-bottom: 0;
}

.analytics-table .num {
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.analytics-table .mono {
  font-family: var(--font-mono);
  font-size: 0.84rem;
}

.analytics-metric {
  white-space: nowrap;
}

.analytics-metric-distribution {
  margin-left: 0.32rem;
  color: var(--analytics-muted);
  font-size: 0.72em;
  font-weight: 500;
}

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

.analytics-table-toggle {
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.8rem;
  padding: 0.35rem 0.55rem;
  border: 0;
  background: transparent;
  color: var(--analytics-muted);
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
  transition: color 0.15s ease;
}

.analytics-table-toggle:hover {
  color: var(--analytics-ink);
}

.analytics-table-toggle svg {
  width: 1rem;
  height: 1rem;
  transition: transform 0.2s ease;
}

.analytics-table-toggle svg.is-expanded {
  transform: rotate(180deg);
}

@media (max-width: 52rem) {
  .analytics-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .analytics-cols {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }
}

@media (max-width: 28rem) {
  .analytics-metrics {
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .analytics-theme-switch:hover {
    transform: none;
  }

  .analytics-table-toggle svg {
    transition: none;
  }
}