:root {
  --cream: #f6f6ef;
  --ink: #191714;
  --muted: rgba(25, 23, 20, 0.68);
  --soft: rgba(25, 23, 20, 0.08);
  --line: rgba(25, 23, 20, 0.18);
  --line-strong: rgba(25, 23, 20, 0.32);
  --gold: #b9770c;
  --gold-bright: #f2a81e;
  --green: #16786a;
  --green-soft: rgba(22, 120, 106, 0.13);
  --red: #d4602a;
  --red-soft: rgba(212, 96, 42, 0.14);
  --gold-soft: rgba(242, 168, 30, 0.18);
  --white: #ffffff;
  --black: #0c0c0c;
  --shadow: 0 18px 50px rgba(12, 12, 12, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
}

body,
button,
input,
textarea {
  letter-spacing: 0;
}

a {
  color: inherit;
}

img,
video {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
}

.hero {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  color: var(--white);
  background: var(--black);
  background-image: url("assets/figures/tasks.png");
  background-position: center;
  background-size: cover;
}

.hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  opacity: 0.83;
  filter: contrast(1.06) saturate(1.04);
}

.hero__shade {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.22);
  box-shadow:
    inset 0 -280px 230px rgba(0, 0, 0, 0.82),
    inset 0 150px 125px rgba(0, 0, 0, 0.28),
    inset 420px 0 250px rgba(0, 0, 0, 0.4);
}

.hero__nav {
  position: absolute;
  top: 22px;
  right: 28px;
  z-index: 2;
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 6px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background: rgba(12, 12, 12, 0.34);
  backdrop-filter: blur(10px);
}

.hero__nav a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 11px;
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.88);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  text-decoration: none;
}

.hero__nav a:hover,
.hero__nav a:focus-visible {
  background: rgba(255, 255, 255, 0.13);
  outline: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 100vh;
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 120px 0 92px;
  flex-direction: column;
  justify-content: flex-end;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold-bright);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: 72px;
  line-height: 0.96;
  font-weight: 500;
  overflow-wrap: anywhere;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.5);
}

.hero h1 span {
  display: inline;
}

.hero__subtitle {
  max-width: 820px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: 25px;
  line-height: 1.28;
  overflow-wrap: anywhere;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.48);
}

.hero__authors {
  max-width: 760px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  overflow-wrap: anywhere;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.5);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.94);
  background: rgba(12, 12, 12, 0.32);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  backdrop-filter: blur(10px);
}

.action:hover,
.action:focus-visible {
  border-color: var(--gold-bright);
  outline: none;
}

.action--primary {
  border-color: var(--gold-bright);
  color: #241700;
  background: var(--gold-bright);
}

.action--disabled {
  color: rgba(255, 255, 255, 0.5);
  cursor: default;
}

.scroll-cue {
  position: absolute;
  right: 28px;
  bottom: 26px;
  z-index: 2;
  color: rgba(255, 255, 255, 0.72);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  text-decoration: none;
}

.article-body {
  background: var(--cream);
  color: var(--ink);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 196px) minmax(0, 840px);
  gap: 70px;
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
  padding: 74px 0 90px;
}

.outline {
  position: sticky;
  top: 30px;
  align-self: start;
}

.outline nav {
  display: grid;
  gap: 2px;
  padding-top: 8px;
}

.outline a {
  padding: 8px 12px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  line-height: 1.25;
  text-decoration: none;
}

.outline a:hover,
.outline a:focus-visible,
.outline a[aria-current="true"] {
  border-left-color: var(--gold-bright);
  color: var(--ink);
  outline: none;
}

.contents-button,
.mobile-outline {
  display: none;
}

.article-shell {
  min-width: 0;
}

.section-anchor {
  scroll-margin-top: 36px;
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.title-block {
  padding-top: 0;
  border-top: 0;
}

.article-shell h2 {
  margin: 0 0 22px;
  font-size: 38px;
  line-height: 1.08;
  font-weight: 500;
}

.article-shell h3 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.2;
  font-weight: 500;
}

.article-shell p {
  margin: 0 0 18px;
  color: rgba(25, 23, 20, 0.82);
  font-size: 18px;
  line-height: 1.65;
}

.article-shell strong {
  color: var(--green);
  font-weight: 800;
}

mark {
  padding: 0.08em 0.25em;
  border-radius: 5px;
  color: #5b3a00;
  background: var(--gold-soft);
  box-decoration-break: clone;
}

.mark-green {
  color: #0f5d51;
  background: var(--green-soft);
}

.mark-red {
  color: #8b391b;
  background: var(--red-soft);
}

.accent-text {
  color: var(--green);
}

.keyline {
  margin: 6px 0 20px;
  padding: 16px 18px;
  border-left: 4px solid var(--gold-bright);
  border-radius: 0 8px 8px 0;
  background: rgba(242, 168, 30, 0.09);
  color: var(--ink);
  font-size: 19px;
}

.figure-full {
  margin: 34px 0 0;
}

figure {
  margin: 0;
}

.figure-full img,
.two-figure-grid img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 28px rgba(12, 12, 12, 0.08);
}

figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  line-height: 1.45;
}

.contribution-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.contribution-card,
.method-steps article,
.demo-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.58);
  box-shadow: 0 12px 30px rgba(12, 12, 12, 0.06);
}

.contribution-card {
  padding: 18px;
  position: relative;
  overflow: hidden;
}

.contribution-card::before {
  content: "";
  display: block;
  height: 4px;
  margin: -18px -18px 16px;
  background: var(--green);
}

.contribution-card--gold::before {
  background: var(--gold-bright);
}

.contribution-card--gold strong {
  color: var(--gold);
}

.contribution-card span {
  display: block;
  margin-bottom: 18px;
  color: var(--gold);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  font-weight: 800;
}

.contribution-card p,
.method-steps p {
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.55;
}

.method-steps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 20px;
}

.method-steps article {
  padding: 20px;
  border-left: 4px solid var(--green);
}

.demo-gallery {
  margin-top: 28px;
}

.demo-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.demo-tab {
  min-height: 36px;
  padding: 8px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.58);
  cursor: pointer;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  font-weight: 700;
}

.demo-tab:hover,
.demo-tab:focus-visible {
  border-color: var(--gold);
  outline: none;
}

.demo-tab[aria-selected="true"] {
  border-color: var(--ink);
  color: var(--white);
  background: var(--ink);
}

.demo-description {
  margin: 0 0 18px;
  padding-left: 16px;
  border-left: 4px solid var(--gold-bright);
  color: rgba(25, 23, 20, 0.8);
  font-size: 17px;
  line-height: 1.55;
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.demo-card {
  overflow: hidden;
  background: #111;
}

.demo-card video {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #000;
}

.demo-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 10px 12px;
  color: var(--white);
  background: #111;
  font-family: Arial, Helvetica, sans-serif;
}

.demo-card__meta h3 {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  font-weight: 700;
}

.demo-card__meta span {
  flex: 0 0 auto;
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
}

.result-bars {
  display: grid;
  gap: 10px;
  margin: 26px 0 24px;
}

.bar-row {
  display: grid;
  grid-template-columns: 170px 64px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  min-height: 38px;
  font-family: Arial, Helvetica, sans-serif;
}

.bar-row span {
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.bar-row strong {
  color: var(--muted);
  font-size: 13px;
  text-align: right;
}

.bar-row i {
  position: relative;
  display: block;
  height: 16px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--soft);
}

.bar-row i::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: calc(var(--value) * 1%);
  border-radius: inherit;
  background: var(--green);
}

.bar-row:first-child i::before {
  background: var(--gold-bright);
}

.table-wrap {
  width: 100%;
  margin-top: 24px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.54);
}

table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
}

caption {
  padding: 13px 14px;
  color: var(--muted);
  text-align: left;
  font-size: 13px;
}

th,
td {
  padding: 11px 12px;
  border-top: 1px solid var(--line);
  text-align: left;
}

th {
  color: var(--ink);
  background: rgba(25, 23, 20, 0.05);
  font-weight: 800;
}

td {
  color: rgba(25, 23, 20, 0.78);
}

.highlight-row td {
  color: var(--ink);
  background: var(--green-soft);
  font-weight: 800;
}

.two-figure-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 18px;
  align-items: start;
  margin-top: 28px;
}

pre {
  margin: 22px 0 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #111;
  color: #f6f6ef;
}

code {
  font-family: "Courier New", Courier, monospace;
  font-size: 13px;
  line-height: 1.6;
}

pre code {
  display: block;
  padding: 18px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
}

.site-footer a {
  color: var(--ink);
  text-decoration: none;
}

@media (max-width: 980px) {
  .hero__nav {
    display: none;
  }

  .hero__content {
    width: min(100% - 32px, 760px);
  }

  .hero h1 {
    font-size: 52px;
  }

  .hero__subtitle {
    font-size: 21px;
  }

  .article-layout {
    display: block;
    width: min(100% - 32px, 840px);
    padding-top: 24px;
  }

  .outline {
    display: none;
  }

  .contents-button {
    z-index: 5;
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    margin: 0 0 24px;
    padding: 8px 14px;
    border: 1px solid var(--line-strong);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(246, 246, 239, 0.92);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    font-weight: 800;
    backdrop-filter: blur(10px);
  }

  .mobile-outline {
    z-index: 5;
    display: block;
    margin: -14px 0 24px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(246, 246, 239, 0.96);
    box-shadow: var(--shadow);
  }

  .mobile-outline[hidden] {
    display: none;
  }

  .mobile-outline nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px;
    padding: 10px;
  }

  .mobile-outline a {
    padding: 9px 10px;
    border-radius: 6px;
    color: var(--ink);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 13px;
    text-decoration: none;
  }

  .mobile-outline a:hover,
  .mobile-outline a:focus-visible {
    background: var(--soft);
    outline: none;
  }

  .contribution-grid,
  .method-steps,
  .two-figure-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .hero {
    min-height: 92vh;
  }

  .hero__content {
    min-height: 92vh;
    padding: 92px 0 74px;
  }

  .hero h1 {
    font-size: 40px;
    line-height: 1.02;
  }

  .hero h1 span {
    display: block;
  }

  .hero__subtitle {
    font-size: 18px;
  }

  .hero__authors {
    font-size: 13px;
  }

  .hero__actions {
    gap: 8px;
  }

  .action {
    min-height: 40px;
    padding: 9px 12px;
    font-size: 13px;
  }

  .scroll-cue {
    display: none;
  }

  .article-shell h2 {
    font-size: 30px;
  }

  .article-shell h3 {
    font-size: 20px;
  }

  .article-shell p {
    font-size: 16px;
  }

  .section-anchor {
    padding: 38px 0;
  }

  .demo-grid {
    grid-template-columns: 1fr;
  }

  .demo-card video {
    aspect-ratio: 4 / 3;
  }

  .bar-row {
    grid-template-columns: 1fr 58px;
  }

  .bar-row i {
    grid-column: 1 / -1;
  }

  .mobile-outline nav {
    grid-template-columns: 1fr;
  }

  .site-footer {
    width: min(100% - 32px, 840px);
  }
}