:root {
  color-scheme: light;
  --page: #f4f7fb;
  --surface: #fbfcff;
  --surface-strong: #ffffff;
  --surface-subtle: #edf2f9;
  --text: #172033;
  --text-soft: #5e6b81;
  --text-faint: #7d899d;
  --line: #dbe3ef;
  --line-strong: #c6d2e2;
  --accent: #285fca;
  --accent-hover: #1f4fae;
  --accent-soft: #e2ebfb;
  --accent-ink: #173d89;
  --shadow: 0 24px 70px rgba(70, 91, 126, 0.14);
  --radius: 14px;
  --radius-small: 9px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #101621;
  --surface: #151d2a;
  --surface-strong: #1a2332;
  --surface-subtle: #202b3c;
  --text: #eef3fb;
  --text-soft: #b3bfd1;
  --text-faint: #8f9cb0;
  --line: #2d3a4d;
  --line-strong: #41516a;
  --accent: #8ab2ff;
  --accent-hover: #a9c8ff;
  --accent-soft: #213b68;
  --accent-ink: #d8e6ff;
  --shadow: 0 24px 70px rgba(4, 8, 15, 0.34);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #101621;
    --surface: #151d2a;
    --surface-strong: #1a2332;
    --surface-subtle: #202b3c;
    --text: #eef3fb;
    --text-soft: #b3bfd1;
    --text-faint: #8f9cb0;
    --line: #2d3a4d;
    --line-strong: #41516a;
    --accent: #8ab2ff;
    --accent-hover: #a9c8ff;
    --accent-soft: #213b68;
    --accent-ink: #d8e6ff;
    --shadow: 0 24px 70px rgba(4, 8, 15, 0.34);
  }
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
strong {
  font-weight: 600;
}

button,
input,
select {
  color: inherit;
  font: inherit;
}

button,
a,
select,
input {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  border: 0;
}

code {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-subtle);
  padding: 0.14em 0.36em;
  font-family: var(--font-mono);
  font-size: 0.88em;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 74%, transparent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 18px;
  top: 14px;
  z-index: 20;
  border-radius: var(--radius-small);
  background: var(--accent);
  color: var(--surface-strong);
  padding: 10px 14px;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(1400px, calc(100% - 64px));
  margin-inline: auto;
}

.button:active {
  transform: translateY(1px);
}

.hero {
  display: grid;
  min-height: min(760px, calc(100dvh - 70px));
  grid-template-columns: minmax(0, 0.92fr) minmax(520px, 1.08fr);
  align-items: center;
  gap: clamp(56px, 8vw, 130px);
  padding-block: clamp(72px, 10vh, 112px);
}

.hero-copy {
  max-width: 680px;
}

.eyebrow,
.panel-kicker {
  margin: 0 0 18px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(3.2rem, 4.8vw, 5rem);
  font-weight: 600;
  letter-spacing: -0.065em;
  line-height: 0.98;
}

.hero-summary {
  max-width: 590px;
  margin: 28px 0 0;
  color: var(--text-soft);
  font-size: clamp(1.04rem, 1.45vw, 1.24rem);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  padding: 10px 17px;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.button-primary {
  background: var(--accent);
  color: #f8fbff;
  font-weight: 600;
}

:root[data-theme="dark"] .button-primary {
  color: #101621;
}

.button-primary:hover {
  background: var(--accent-hover);
}

.button-secondary {
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--text);
}

.button-secondary:hover {
  border-color: var(--accent);
  color: var(--accent-ink);
}

.coverage-panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: clamp(26px, 4vw, 44px);
}

.coverage-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.coverage-controls {
  display: grid;
  justify-items: end;
  gap: 11px;
}

.panel-kicker {
  margin-bottom: 8px;
  color: var(--text-faint);
  font-size: 0.65rem;
}

.coverage-heading h2 {
  margin: 0;
  font-size: clamp(1.45rem, 2vw, 1.9rem);
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.coverage-note {
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.coverage-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-small);
  background: var(--surface-subtle);
  padding: 3px;
}

.coverage-toggle button {
  min-width: 58px;
  border-radius: 6px;
  background: transparent;
  padding: 6px 9px;
  cursor: pointer;
  color: var(--text-soft);
  font-size: 0.68rem;
  font-weight: 500;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.coverage-toggle button[aria-pressed="true"] {
  background: var(--surface-strong);
  color: var(--accent-ink);
  box-shadow: 0 1px 4px rgba(70, 91, 126, 0.14);
}

.coverage-toggle button:active {
  transform: translateY(1px);
}

.coverage-view {
  min-height: 267px;
}

.coverage-chart {
  display: grid;
  min-height: 245px;
  margin-top: 38px;
  grid-template-columns: repeat(var(--bar-count, 10), minmax(14px, 1fr));
  align-items: end;
  gap: clamp(5px, 0.75vw, 11px);
  border-bottom: 1px solid var(--line-strong);
  padding: 0 4px 26px;
}

.coverage-bar-wrap {
  position: relative;
  display: flex;
  height: 205px;
  align-items: flex-end;
  justify-content: center;
}

.coverage-bar {
  width: 100%;
  min-width: 8px;
  max-width: 34px;
  height: max(8px, var(--bar-height));
  border-radius: 7px 7px 3px 3px;
  background: color-mix(in srgb, var(--accent) var(--bar-tone), var(--accent-soft));
  transform-origin: bottom;
  transition: filter 180ms ease, transform 180ms ease;
}

.coverage-bar-wrap:hover .coverage-bar {
  filter: saturate(1.14);
  transform: scaleY(1.025);
}

.coverage-value {
  position: absolute;
  bottom: calc(var(--bar-height) + 7px);
  left: 50%;
  color: var(--text-soft);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  transform: translateX(-50%);
}

.coverage-year {
  position: absolute;
  bottom: -24px;
  left: 50%;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.59rem;
  transform: translateX(-50%);
}

.venue-chart {
  display: grid;
  min-height: 245px;
  align-content: center;
  gap: 12px;
  margin-top: 38px;
}

.venue-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 30px;
  align-items: center;
  gap: 13px;
}

.venue-name,
.venue-count {
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.venue-name {
  overflow: hidden;
  color: var(--text-soft);
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.venue-count {
  color: var(--text);
  font-weight: 600;
  text-align: right;
}

.venue-measure {
  display: flex;
  height: 10px;
  align-items: center;
}

.venue-bar {
  width: var(--venue-width);
  height: 7px;
  border-radius: 3px;
  background: color-mix(in srgb, var(--accent) 78%, var(--accent-soft));
  transform-origin: left;
  transition: filter 180ms ease, transform 180ms ease;
}

.venue-row:hover .venue-bar {
  filter: saturate(1.12);
  transform: scaleY(1.25);
}

.venue-footnote {
  margin: 5px 0 0;
  color: var(--text-faint);
  font-size: 0.67rem;
  text-align: right;
}

.hero-stats {
  display: grid;
  margin: 34px 0 0;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--line);
}

.hero-stats div {
  background: var(--surface-strong);
  padding: 16px;
}

.hero-stats dt {
  color: var(--text-faint);
  font-size: 0.69rem;
  font-weight: 500;
}

.hero-stats dd {
  margin: 5px 0 0;
  font-family: var(--font-mono);
  font-size: 1.22rem;
  font-weight: 600;
}

.catalog-section {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding-block: clamp(82px, 10vw, 140px);
}

.section-heading {
  max-width: 760px;
}

.section-heading h2,
.about-copy h2 {
  margin: 0;
  font-size: clamp(2.3rem, 4.8vw, 4.8rem);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.section-heading p,
.about-copy p {
  max-width: 62ch;
  margin: 18px 0 0;
  color: var(--text-soft);
  font-size: 1.02rem;
}

.search-shell {
  max-width: 980px;
  margin-top: 48px;
}

.search-shell > label {
  display: block;
  margin-bottom: 9px;
  color: var(--text-soft);
  font-size: 0.78rem;
  font-weight: 500;
}

.search-control {
  position: relative;
}

.search-control input {
  width: 100%;
  height: 62px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface-strong);
  padding: 0 58px 0 19px;
  font-size: 1rem;
  outline: none;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.search-control input::placeholder {
  color: var(--text-faint);
}

.search-control input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 15%, transparent);
}

.search-shortcut {
  position: absolute;
  top: 50%;
  right: 17px;
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  transform: translateY(-50%);
}

.catalog-layout {
  display: grid;
  margin-top: 36px;
  grid-template-columns: 276px minmax(0, 1fr);
  align-items: start;
  gap: clamp(34px, 4vw, 64px);
}

.sort-control {
  display: grid;
  gap: 6px;
}

.sort-control > span {
  color: var(--text-soft);
  font-size: 0.7rem;
  font-weight: 500;
}

select {
  width: 100%;
  min-width: 0;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--surface);
  padding: 0 36px 0 12px;
  cursor: pointer;
  font-size: 0.78rem;
  transition: border-color 180ms ease, background-color 180ms ease, box-shadow 180ms ease;
}

select:hover {
  border-color: var(--line-strong);
}

select:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent);
  outline: 0;
}

.results-panel {
  min-width: 0;
}

.results-toolbar {
  display: flex;
  min-height: 43px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 15px;
}

.results-toolbar p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.82rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.sort-control {
  grid-template-columns: auto auto;
  align-items: center;
}

.sort-control select {
  height: 36px;
}

.results-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toolbar-button {
  height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--surface);
  padding: 0 11px;
  cursor: pointer;
  color: var(--text-soft);
  font-size: 0.7rem;
  font-weight: 500;
}

.toolbar-button:not(:disabled):hover {
  border-color: var(--accent);
  color: var(--accent-ink);
}

.toolbar-button:disabled {
  cursor: not-allowed;
  opacity: 0.46;
}

.paper-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.paper-item {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr) auto;
  gap: clamp(20px, 3vw, 42px);
  border-bottom: 1px solid var(--line);
  padding-block: 28px;
  animation: item-reveal 480ms cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: calc(min(var(--item-index), 10) * 34ms);
}

.paper-index {
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.71rem;
  line-height: 1.7;
}

.paper-index strong {
  display: block;
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 600;
}

.paper-title {
  display: inline;
  color: var(--text);
  font-size: clamp(1.02rem, 1.45vw, 1.24rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.4;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.paper-title:hover {
  color: var(--accent-ink);
  text-decoration: underline;
}

.paper-authors {
  margin: 9px 0 0;
  color: var(--text-soft);
  font-size: 0.8rem;
  line-height: 1.55;
}

.paper-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 13px;
}

.tag {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-subtle);
  padding: 3px 8px;
  color: var(--text-soft);
  font-size: 0.64rem;
  font-weight: 500;
  line-height: 1.25;
}

.paper-actions {
  display: flex;
  min-width: 76px;
  align-items: flex-start;
  justify-content: flex-end;
}

.details-button {
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--surface-strong);
  padding: 7px 10px;
  cursor: pointer;
  color: var(--text-soft);
  font-size: 0.7rem;
  font-weight: 500;
  transition: border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.details-button:hover {
  border-color: var(--accent);
  color: var(--accent-ink);
}

.details-button:active {
  transform: translateY(1px);
}

.pagination {
  display: grid;
  grid-template-columns: minmax(92px, 1fr) auto minmax(92px, 1fr);
  align-items: center;
  gap: 18px;
  margin-top: 26px;
  padding-top: 22px;
}

.pagination-pages {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.pagination-button {
  display: inline-flex;
  min-width: 36px;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  background: transparent;
  padding: 0 10px;
  cursor: pointer;
  color: var(--text-soft);
  font-size: 0.72rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.pagination-button--nav {
  min-width: 92px;
  border-color: var(--line);
  background: var(--surface-strong);
}

.pagination-button--previous {
  justify-self: start;
}

.pagination-button--next {
  justify-self: end;
}

.pagination-button:not(:disabled):hover {
  border-color: color-mix(in srgb, var(--accent) 58%, var(--line));
  background: color-mix(in srgb, var(--surface-strong) 82%, var(--accent-soft) 18%);
  color: var(--accent-ink);
}

.pagination-button[aria-current="page"] {
  border-color: color-mix(in srgb, var(--accent) 48%, var(--line));
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.pagination-button:not(:disabled):active {
  transform: translateY(1px);
}

.pagination-button:disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

.pagination-ellipsis {
  width: 26px;
  color: var(--text-faint);
  font-size: 0.76rem;
  text-align: center;
}

.pagination-summary {
  display: none;
  margin: 0;
  color: var(--text-faint);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.loading-state {
  display: grid;
  gap: 1px;
  overflow: hidden;
  background: var(--line);
}

.loading-state span {
  height: 112px;
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface-subtle) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: skeleton 1.4s ease-in-out infinite;
}

.empty-state {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  margin-top: 28px;
  padding: clamp(36px, 7vw, 74px);
  text-align: center;
}

.empty-state h3 {
  margin: 0;
  font-size: 1.3rem;
}

.empty-state p {
  max-width: 48ch;
  margin: 10px auto 22px;
  color: var(--text-soft);
  font-size: 0.85rem;
}

.about-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(520px, 1.2fr);
  gap: clamp(60px, 10vw, 150px);
  padding-block: clamp(92px, 12vw, 164px);
}

.about-copy h2 {
  max-width: 580px;
  font-size: clamp(2.5rem, 4.5vw, 4.6rem);
}

.method-grid {
  display: grid;
  margin: 0;
  grid-template-columns: 1.45fr 1fr;
  gap: 42px 50px;
}

.method-grid div:first-child {
  grid-row: span 2;
  border-right: 1px solid var(--line-strong);
  padding-right: 50px;
}

.method-grid dt {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.method-grid dd {
  margin: 11px 0 0;
  color: var(--text-soft);
  font-size: 0.82rem;
  line-height: 1.7;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.footer-inner {
  display: flex;
  min-height: 110px;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  color: var(--text-faint);
  font-size: 0.72rem;
}

.footer-inner p {
  margin: 0;
}


.noscript-message {
  position: fixed;
  inset: auto 20px 20px;
  z-index: 30;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-small);
  background: var(--surface-strong);
  padding: 14px 16px;
  color: var(--text);
  box-shadow: var(--shadow);
  font-size: 0.82rem;
}

@keyframes item-reveal {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes skeleton {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}