:root {
  --ink: #172033;
  --ink-deep: #0a1020;
  --muted: #586277;
  --soft: #8d96a8;
  --line: #dde3ec;
  --line-strong: #cbd4e1;
  --paper: #ffffff;
  --canvas: #f4f7fb;
  --blue: #2555d9;
  --blue-bright: #4b76f2;
  --blue-soft: #eaf0ff;
  --orange: #d66732;
  --orange-soft: #fff0e7;
  --teal: #148b85;
  --teal-soft: #e8f6f4;
  --max: 1240px;
  --copy: 700px;
  --header-h: 72px;
  --sans: "DM Sans", "Helvetica Neue", Arial, sans-serif;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --shadow-sm: 0 8px 24px rgba(24, 40, 72, 0.06);
  --shadow-lg: 0 28px 70px rgba(24, 40, 72, 0.12);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  margin: 0;
  overflow-x: clip;
  color: var(--ink);
  background:
    linear-gradient(180deg, var(--canvas) 0, var(--canvas) 760px, var(--paper) 1060px);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}

::selection {
  color: var(--ink-deep);
  background: #cad8ff;
}

a {
  color: var(--blue);
  text-decoration: none;
  text-underline-offset: 3px;
}

a:hover { text-decoration: underline; }

.reading-progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 100;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--orange));
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  border-bottom: 1px solid rgba(203, 212, 225, 0.72);
  background: rgba(247, 249, 252, 0.86);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.72) inset;
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
}

.site-header-inner {
  width: min(100%, var(--max));
  height: 100%;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  min-width: 0;
  order: 2;
}

.nav-item { position: relative; }

.nav-btn,
.nav-link {
  border: 0;
  border-radius: 999px;
  padding: 9px 13px;
  color: #303a4e;
  background: transparent;
  font: 600 15.5px/1 var(--sans);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  transition: color 180ms ease, background 180ms ease;
}

.nav-btn i {
  color: var(--soft);
  font-size: 9px;
}

.nav-btn:hover,
.nav-link:hover,
.nav-item.open .nav-btn {
  color: var(--blue);
  background: var(--blue-soft);
  text-decoration: none;
}

.dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 12px);
  left: 0;
  width: min(390px, calc(100vw - 32px));
  max-height: min(620px, calc(100vh - 96px));
  padding: 9px;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-lg);
}

.nav-item.open .dropdown {
  display: block;
  animation: menu-in 160ms ease-out both;
}

.dropdown a {
  display: block;
  padding: 9px 11px;
  border-radius: 8px;
  color: var(--ink);
  font-size: 13.5px;
  line-height: 1.35;
}

.dropdown a:hover {
  color: var(--blue);
  background: var(--blue-soft);
  text-decoration: none;
}

.brand {
  order: 1;
  display: flex;
  align-items: baseline;
  gap: 11px;
  flex-shrink: 0;
  color: var(--ink);
  line-height: 1;
}

.brand:hover { text-decoration: none; }

.brand strong {
  color: var(--ink-deep);
  font-size: 25px;
  letter-spacing: -0.045em;
}

.brand span {
  padding-left: 11px;
  border-left: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.075em;
  text-transform: uppercase;
}

.wrap {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 0 32px;
}

.hero {
  position: relative;
  min-height: 420px;
  padding: 80px 0 44px;
  overflow: visible;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -2;
  top: -250px;
  right: -200px;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 119, 239, 0.15), rgba(79, 119, 239, 0) 68%);
}

.kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 17px;
  color: #667087;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.kicker span {
  width: 24px;
  height: 2px;
  background: var(--blue);
}

.hero h1 {
  position: relative;
  width: fit-content;
  margin: 0;
  color: var(--blue);
  font-size: clamp(58px, 7vw, 78px);
  font-weight: 700;
  letter-spacing: -0.075em;
  line-height: 0.82;
}

.hero h1 span { color: var(--ink-deep); }

.hero-statement {
  max-width: 920px;
  margin: 24px 0 27px;
  color: var(--ink-deep);
  font-family: var(--serif);
  font-size: clamp(32px, 4.2vw, 48px);
  font-weight: 500;
  letter-spacing: -0.034em;
  line-height: 1.02;
}

.hero .pills {
  max-width: 880px;
  margin-top: 42px;
}

.hero .lede {
  max-width: 770px;
  margin: 0;
  padding-left: 20px;
  border-left: 2px solid var(--line-strong);
  color: var(--muted);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.55;
}

.hero .lede strong {
  color: var(--blue);
  font-family: var(--sans);
  font-size: 0.88em;
  font-weight: 700;
}

.hero-orbit {
  position: absolute;
  z-index: -1;
  border: 1px solid rgba(37, 85, 217, 0.16);
  border-radius: 50%;
  pointer-events: none;
}

.hero-orbit::after {
  content: "";
  position: absolute;
  top: 50%;
  left: -5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 7px rgba(37, 85, 217, 0.1);
}

.orbit-one {
  top: 74px;
  right: 58px;
  width: 260px;
  height: 260px;
  transform: rotate(24deg);
}

.orbit-two {
  top: 32px;
  right: -20px;
  width: 420px;
  height: 420px;
  border-color: rgba(214, 103, 50, 0.13);
  transform: rotate(104deg);
}

.orbit-two::after {
  background: var(--orange);
  box-shadow: 0 0 0 7px rgba(214, 103, 50, 0.09);
}

.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 11px 0 30px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 10px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.82);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1;
  transition: transform 180ms ease, color 180ms ease, border 180ms ease, background 180ms ease;
}

.pill i { font-size: 13px; }

.pill:hover {
  border-color: var(--ink);
  color: var(--ink);
  background: #fff;
  text-decoration: none;
  transform: translateY(-2px);
}

.pill.solid {
  border-color: var(--blue);
  color: #fff;
  background: var(--blue);
}

.pill.solid:hover {
  border-color: #1746c7;
  color: #fff;
  background: #1746c7;
}

.pill.npu {
  border-color: #b9502c;
  color: #fff;
  background: #b9502c;
}

.pill.npu:hover {
  border-color: #9e4022;
  color: #fff;
  background: #9e4022;
}

.cards {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: -74px 0 112px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--line);
  box-shadow: var(--shadow-lg);
}

.card {
  position: relative;
  min-height: 230px;
  padding: 27px 25px 24px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.97);
}

.card::after {
  content: "";
  position: absolute;
  right: -28px;
  bottom: -30px;
  width: 100px;
  height: 100px;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.card-kicker {
  margin: 0 0 25px;
  color: var(--soft);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.card.accent-blue .card-kicker { color: var(--blue); }
.card.accent-teal .card-kicker { color: var(--teal); }
.card.accent-orange .card-kicker { color: var(--orange); }

.card .metric {
  margin: 0 0 13px;
  color: var(--ink-deep);
  font-family: var(--serif);
  font-size: 54px;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 0.9;
}

.card.accent-blue .metric { color: var(--blue); }
.card.accent-teal .metric { color: var(--teal); }
.card.accent-orange .metric { color: var(--orange); }

.card h3 {
  max-width: 230px;
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.35;
}

.card p {
  max-width: 230px;
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.5;
}

.part {
  --section-color: var(--blue);
  position: relative;
  padding: 108px 0 72px;
  border-top: 1px solid var(--line);
}

#tc-paper { --section-color: var(--orange); }

.part::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 86px;
  height: 3px;
  background: var(--section-color);
}

.part-label {
  width: fit-content;
  margin: 0 0 21px;
  padding: 7px 11px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.13em;
  line-height: 1;
  text-transform: uppercase;
}

.part-label.blue {
  color: var(--blue);
  background: var(--blue-soft);
}

.part-label.orange {
  color: var(--orange);
  background: var(--orange-soft);
}

.paper-title {
  max-width: 980px;
  margin: 0 0 24px;
  color: var(--ink-deep);
  font-family: var(--serif);
  font-size: clamp(32px, 3.8vw, 46px);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.04;
}

.authors {
  margin: 0 0 5px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
}

.affil,
.venue {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 13.5px;
}

.venue {
  margin: 10px 0 16px;
  font-style: italic;
}

h3.block {
  position: relative;
  max-width: 860px;
  margin: 96px 0 29px;
  padding-top: 19px;
  color: var(--ink-deep);
  font-family: var(--serif);
  font-size: clamp(27px, 3.2vw, 38px);
  font-weight: 600;
  letter-spacing: -0.026em;
  line-height: 1.12;
}

h3.block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--section-color);
}

p { margin: 0 0 15px; }

.part > p:not(.part-label):not(.authors):not(.affil):not(.venue),
.part > .facts-wide {
  max-width: var(--copy);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(440px, 1.18fr);
  gap: clamp(38px, 5vw, 78px);
  align-items: center;
  margin: 28px 0 72px;
}

.split-portrait {
  grid-template-columns: minmax(0, 0.78fr) minmax(420px, 1.22fr);
}

.split-rev {
  grid-template-columns: minmax(440px, 1.18fr) minmax(0, 0.82fr);
}

.split-rev .split-fig { order: -1; }
.split-copy { min-width: 0; }
.split-copy p:last-child,
.split-copy .facts:last-child { margin-bottom: 0; }

.facts {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.facts li {
  position: relative;
  padding: 0 0 10px 20px;
  color: #3d475a;
  font-size: 16px;
  line-height: 1.68;
}

.facts li:last-child { padding-bottom: 0; }

.facts li::before {
  content: "";
  position: absolute;
  top: 0.66em;
  left: 1px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--section-color);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--section-color) 11%, transparent);
}

.facts-wide {
  margin-bottom: 22px;
  padding: 0;
  border: 0;
  background: transparent;
}

.figure {
  margin: 30px 0 76px;
  padding: 26px 28px 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.split .figure {
  margin: 0;
  padding: 22px 22px 17px;
}

.figure img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 480px;
  margin: 0 auto;
  object-fit: contain;
  cursor: zoom-in;
}

.figure.banner {
  padding: 34px 40px 19px;
}

.figure.banner img { max-height: 540px; }
.split .figure img { max-height: 420px; }
.split-portrait .figure img { max-height: 500px; }
.figure.compact img {
  max-width: 88%;
  max-height: 340px;
}

.caption {
  margin: 17px 0 0;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  color: #687287;
  font-size: 12.5px;
  line-height: 1.52;
}

.caption strong {
  color: var(--ink);
  font-weight: 700;
}

.cmp-block { margin: 22px 0 65px; }

.table-card {
  margin: 0;
  padding: 25px 27px 19px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.table-caption {
  max-width: 900px;
  margin: 0 0 17px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.table-caption strong { color: var(--ink); }
.table-scroll { overflow-x: auto; }

.cmp {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  text-align: center;
}

.cmp th,
.cmp td {
  padding: 10px 11px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}

.cmp thead th {
  color: var(--ink);
  background: var(--canvas);
  font-weight: 700;
}

.cmp thead tr:first-child th { border-bottom-color: var(--line-strong); }
.cmp tbody tr:last-child td { border-bottom: 0; }
.cmp tbody tr:hover td { background: #f8fafc; }

.cmp td:first-child,
.cmp th:first-child,
.cmp td:nth-child(2),
.cmp th:nth-child(2),
.cmp td:nth-child(3) { text-align: left; }

.cmp .bs {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.table-note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
}

#citations {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

#citations::before { width: 86px; }

#citations > .part-label,
#citations > .paper-title {
  grid-column: 1 / -1;
}

.cite-box {
  min-width: 0;
  margin: 5px 0 18px;
  padding: 23px 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--canvas);
}

.cite-box h4 {
  margin: 0 0 11px;
  font-size: 16px;
}

.cite-box .pill {
  min-height: 35px;
  padding: 7px 12px;
  font-size: 12px;
}

pre {
  margin: 14px 0 0;
  color: #586277;
  font: 12px/1.55 "SFMono-Regular", Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
}

.footer {
  margin-top: 20px;
  padding: 32px 0 56px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer p { max-width: 900px; }

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 600ms ease, transform 600ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(8px, 1.4vh, 16px);
  width: 100vw;
  height: 100dvh;
  padding: clamp(44px, 6vh, 56px) clamp(12px, 3vw, 28px) clamp(12px, 2.4vh, 24px);
  background: rgba(10, 16, 32, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  cursor: zoom-out;
}

.lightbox[hidden] { display: none; }

.lightbox-stage {
  flex: 0 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 0;
  width: 80vw;
  height: 80vh;
}

.lightbox img {
  display: block;
  max-width: 80vw;
  max-height: 80vh;
  width: auto;
  height: auto;
  object-fit: contain;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  cursor: default;
}

.lightbox-caption {
  flex: 0 0 auto;
  max-width: min(92vw, 980px);
  margin: 0 auto;
  color: #e8ecf4;
  font-size: clamp(16px, 1.7vw, 20px);
  line-height: 1.55;
  text-align: center;
}

.lightbox-caption:empty { display: none; }

.lightbox-close {
  position: absolute;
  top: 16px;
  right: 20px;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.22);
}

body.lightbox-open { overflow: hidden; }

@keyframes menu-in {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1040px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .card { min-height: 205px; }
  .split,
  .split-portrait,
  .split-rev {
    grid-template-columns: minmax(0, 0.88fr) minmax(360px, 1.12fr);
    gap: 38px;
  }
  .nav-link { display: none; }
}

@media (max-width: 800px) {
  :root { --header-h: 62px; }
  body { font-size: 16px; }
  .site-header-inner,
  .wrap { padding-right: 22px; padding-left: 22px; }
  .brand span { display: none; }
  .nav-btn { font-size: 13.5px; padding: 8px 10px; }
  .hero { min-height: 410px; padding: 68px 0 44px; }
  .hero h1 { font-size: clamp(56px, 13vw, 76px); }
  .hero-statement { max-width: 680px; }
  .orbit-one { right: -90px; }
  .orbit-two { right: -170px; }
  .cards { margin-bottom: 85px; }
  .part { padding-top: 84px; }
  .split,
  .split-portrait,
  .split-rev {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 56px;
  }
  .split-rev .split-fig { order: 0; }
  .split .figure { padding: 20px 20px 16px; }
  .figure.banner { padding: 24px 22px 16px; }
  #citations { grid-template-columns: 1fr; }
  #citations > * { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  :root { --header-h: auto; }
  body {
    background: linear-gradient(180deg, var(--canvas) 0, var(--canvas) 660px, var(--paper) 940px);
  }
  .site-header { height: auto; }
  .site-header-inner {
    min-height: 58px;
    padding: 9px 16px;
    gap: 6px;
  }
  .brand strong { font-size: 21px; }
  .nav { gap: 1px; }
  .nav-btn {
    gap: 4px;
    padding: 8px 7px;
    font-size: 12.5px;
  }
  .dropdown {
    position: fixed;
    top: 62px;
    right: 12px;
    left: 12px;
    width: auto;
  }
  .wrap { padding-right: 17px; padding-left: 17px; }
  .hero {
    min-height: 400px;
    padding: 60px 0 42px;
  }
  .kicker { font-size: 10px; }
  .hero h1 { font-size: clamp(52px, 19vw, 70px); }
  .hero-statement {
    margin-top: 36px;
    font-size: clamp(29px, 8.5vw, 39px);
  }
  .hero .lede {
    padding-left: 14px;
    font-size: 17px;
  }
  .orbit-one,
  .orbit-two { opacity: 0.56; }
  .pills { gap: 7px; }
  .pill {
    min-height: 38px;
    padding: 8px 12px;
    font-size: 13px;
  }
  .cards {
    grid-template-columns: 1fr;
    margin: -64px 0 72px;
    border-radius: 16px;
  }
  .card {
    min-height: 0;
    padding: 22px 21px;
  }
  .card-kicker { margin-bottom: 15px; }
  .card .metric { font-size: 48px; }
  .card h3,
  .card p { max-width: 90%; }
  .part { padding: 72px 0 45px; }
  .paper-title { font-size: clamp(31px, 9vw, 40px); }
  h3.block {
    margin-top: 70px;
    font-size: 30px;
  }
  .figure,
  .figure.banner,
  .split .figure {
    margin-bottom: 50px;
    padding: 16px 14px 13px;
    border-radius: 14px;
  }
  .split .figure { margin-bottom: 0; }
  .caption { font-size: 11.5px; }
  .lightbox img { border-radius: 8px; }
  .table-card { padding: 18px 14px 14px; }
  .cite-box { padding: 20px 17px; }
}