:root {
  color-scheme: light;
  --bg: #fbfcfa;
  --paper: #ffffff;
  --ink: #141817;
  --muted: #5f6864;
  --line: #e1e6e1;
  --teal: #0c7a78;
  --teal-dark: #095c5b;
  --green-soft: #edf5f1;
  --rust: #b6533c;
  --gold: #5f7368;
  --moss: #536f4a;
  --shadow: 0 18px 50px rgba(22, 30, 26, 0.11);
  --max: 1180px;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  letter-spacing: 0;
}

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

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

button {
  font: inherit;
  letter-spacing: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius);
  transform: translateY(-140%);
  transition: transform 180ms ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(225, 230, 225, 0.86);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.nav-shell {
  width: min(100% - 40px, var(--max));
  min-height: 66px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background:
    linear-gradient(90deg, var(--teal) 0 42%, transparent 42% 58%, var(--rust) 58%),
    linear-gradient(0deg, transparent 0 42%, var(--moss) 42% 58%, transparent 58%);
  border: 1px solid rgba(20, 24, 23, 0.16);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 9px 10px;
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 650;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--ink);
  background: #edf1ec;
  outline: none;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: var(--radius);
  padding: 9px 12px;
  color: var(--ink);
}

.hero {
  width: min(100% - 40px, var(--max));
  margin: 0 auto;
  padding: 78px 0 46px;
}

.hero-copy {
  max-width: var(--max);
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.authors,
.affiliations {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  width: 100%;
  max-width: 980px;
  gap: 10px 22px;
  line-height: 1.6;
  letter-spacing: 0;
}

.authors {
  margin: 4px 0 14px;
  font-size: 1rem;
  font-weight: 600;
}

.affiliations {
  margin: 0 0 28px;
  font-size: 0.875rem;
}

.authors span,
.affiliations span {
  white-space: nowrap;
}

.authors sup,
.affiliations sup {
  margin-left: 3px;
  margin-right: 3px;
  color: var(--teal-dark);
  font-size: 0.7em;
}

.conference {
  margin: 0 0 20px;
  padding: 8px 0;
  border-bottom: 2px solid var(--teal);
  color: var(--teal-dark);
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal-dark);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  width: 100%;
  max-width: 1100px;
  margin-bottom: 20px;
  font-size: 4rem;
  line-height: 1.02;
  text-align: center;
  letter-spacing: 0;
  text-wrap: balance;
}

.title-line {
  display: block;
  white-space: nowrap;
}

h2 {
  margin-bottom: 0;
  font-size: 2.25rem;
  line-height: 1.14;
  letter-spacing: 0;
  text-wrap: balance;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
  line-height: 1.25;
}

.lead {
  max-width: 780px;
  margin-bottom: 28px;
  color: #35413d;
  font-size: 1.18rem;
  text-align: center;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
}

.button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  border: 1px solid transparent;
  padding: 10px 16px;
  font-size: 0.95rem;
  font-weight: 750;
}

.button.primary {
  background: var(--teal);
  color: #fff;
}

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

.button.secondary {
  background: var(--ink);
  color: #fff;
}

.button.ghost {
  border-color: var(--line);
  background: var(--paper);
  color: var(--ink);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 26px;
}

.stat,
.feature-card,
.result-metrics article,
.resource-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.stat {
  min-height: 132px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stat strong {
  color: var(--rust);
  font-size: 2rem;
  line-height: 1;
}

.stat span {
  color: var(--muted);
  font-size: 0.92rem;
}

.wide-figure {
  margin: 0;
}

.wide-figure img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.hero-figure img {
  box-shadow: 0 22px 58px rgba(22, 30, 26, 0.15);
}

figcaption {
  max-width: 940px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.92rem;
}

.band {
  padding: 76px 0;
  border-top: 1px solid var(--line);
}

.band > * {
  width: min(100% - 40px, var(--max));
  margin-left: auto;
  margin-right: auto;
}

.summary-band,
.method-band,
.results-band {
  background: var(--paper);
}

.compact-band,
.gallery-band {
  background: #f5f8f5;
}

.demo-band,
.kasa-band,
.resources-band {
  background: var(--bg);
}

.citation-band {
  background: var(--paper);
}

.section-heading {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  align-items: end;
  gap: 44px;
  margin-bottom: 30px;
}

.section-heading h2 {
  max-width: 900px;
}

.summary-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 34px;
  color: #2d3734;
  font-size: 1.03rem;
}

.summary-layout p {
  margin-bottom: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.feature-card {
  padding: 22px;
}

.card-kicker {
  margin-bottom: 10px;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 850;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.feature-card p:last-child,
.result-metrics p,
.resource-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.demo-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: 30px;
  align-items: center;
}

.video-frame video {
  width: 100%;
  aspect-ratio: 9 / 4;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #0b0d0c;
  box-shadow: var(--shadow);
}

.demo-copy {
  color: #2d3734;
}

.definition-list {
  display: grid;
  gap: 14px;
  margin: 24px 0 0;
}

.definition-list div {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.definition-list dt {
  color: var(--teal-dark);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.definition-list dd {
  margin: 4px 0 0;
  color: var(--muted);
}

.method-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.method-steps article {
  border-top: 3px solid var(--teal);
  padding: 18px 0 0;
}

.method-steps article:nth-child(2) {
  border-color: var(--rust);
}

.method-steps article:nth-child(3) {
  border-color: var(--teal-dark);
}

.method-steps article:nth-child(4) {
  border-color: var(--moss);
}

.method-steps span {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-weight: 850;
}

.method-steps p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.kasa-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 22px;
  align-items: stretch;
}

.kasa-band .section-heading {
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 32px;
}

.kasa-band h2 {
  font-size: 2.08rem;
  white-space: nowrap;
}

.kasa-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.kasa-facts div {
  min-height: 0;
  padding: 14px 16px;
  border-left: 4px solid var(--teal);
  border-radius: var(--radius);
  background: var(--paper);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.kasa-facts div:nth-child(2) {
  border-color: var(--rust);
}

.kasa-facts div:nth-child(3) {
  border-color: var(--teal-dark);
}

.kasa-facts div:nth-child(4) {
  border-color: var(--moss);
}

.kasa-facts strong {
  display: block;
  font-size: 1.55rem;
  line-height: 1.05;
}

.kasa-facts span {
  color: var(--muted);
  font-size: 0.92rem;
}

.result-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 26px;
}

.result-metrics article {
  padding: 20px;
}

.result-metrics span {
  color: var(--teal-dark);
  font-size: 0.78rem;
  font-weight: 850;
  text-transform: uppercase;
}

.result-metrics strong {
  display: block;
  margin: 8px 0 8px;
  color: var(--rust);
  font-size: 2rem;
  line-height: 1;
}

.table-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: 18px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.table-wrap h3 {
  margin: 0;
  padding: 18px 18px 4px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
  font-size: 0.88rem;
}

th,
td {
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 850;
  text-transform: uppercase;
}

.best-row {
  background: var(--green-soft);
}

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

.gallery-tabs button {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--muted);
  padding: 9px 13px;
  font-weight: 750;
  cursor: pointer;
}

.gallery-tabs button[aria-selected="true"] {
  border-color: var(--teal);
  background: var(--teal);
  color: #fff;
}

.gallery-figure img {
  cursor: zoom-in;
}

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

.resource-card {
  display: block;
  padding: 20px;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    border-color 160ms ease;
}

.resource-card:hover,
.resource-card:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(12, 122, 120, 0.45);
  box-shadow: 0 14px 28px rgba(22, 30, 26, 0.1);
  outline: none;
}

.resource-card span {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 850;
  text-transform: uppercase;
}

.resource-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.citation-block {
  margin-top: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f7f9f7;
  padding: 22px;
  color: #24302d;
  font-family:
    "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.92rem;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.citation-block code {
  font: inherit;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 20px;
  color: var(--muted);
  text-align: center;
}

.site-footer p {
  margin: 0;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 28px;
  background: rgba(9, 12, 11, 0.82);
}

.lightbox[hidden] {
  display: none;
}

.lightbox img {
  max-height: calc(100vh - 80px);
  width: auto;
  border-radius: var(--radius);
  background: #fff;
}

.lightbox-close {
  position: fixed;
  top: 18px;
  right: 18px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
}

@media (max-width: 1120px) {
  .kasa-band h2 {
    white-space: normal;
  }
}

@media (max-width: 980px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 1.9rem;
  }

  .section-heading,
  .summary-layout,
  .demo-layout,
  .kasa-grid,
  .table-grid {
    grid-template-columns: 1fr;
  }

  .kasa-band .section-heading {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .stat-grid,
  .feature-grid,
  .method-steps,
  .resource-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .kasa-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .nav-shell {
    width: min(100% - 28px, var(--max));
    flex-wrap: wrap;
    min-height: 60px;
    padding: 10px 0;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding-bottom: 6px;
  }

  .site-header.open .nav-links {
    display: flex;
  }

  .nav-links a {
    background: var(--paper);
  }

  .hero {
    width: min(100% - 28px, var(--max));
    padding-top: 46px;
  }

  .band {
    padding: 56px 0;
  }

  .band > * {
    width: min(100% - 28px, var(--max));
  }

  h1 {
    font-size: clamp(1.4rem, 6.4vw, 2.35rem);
    line-height: 1.08;
  }

  h2 {
    font-size: 1.65rem;
  }

  .kasa-band h2 {
    font-size: clamp(1.25rem, 6vw, 1.45rem);
    white-space: nowrap;
  }

  .lead {
    font-size: 1.03rem;
  }

  .stat-grid,
  .feature-grid,
  .method-steps,
  .resource-grid,
  .result-metrics,
  .kasa-facts {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }
}