:root {
  --bg: #fffdf8;
  --bg-soft: #f2f6f0;
  --bg-line: #e8eee6;
  --surface: #ffffff;
  --ink: #1b231f;
  --muted: #647068;
  --muted-strong: #3f4942;
  --forest: #0f7569;
  --forest-dark: #0a5a51;
  --sage: #7f9a84;
  --sand: #c9862f;
  --clay: #a84f3f;
  --teal: var(--forest);
  --teal-dark: var(--forest-dark);
  --amber: var(--sand);
  --rose: var(--clay);
  --border: #dce7df;
  --shadow: 0 22px 64px rgba(27, 35, 31, 0.12);
  --shadow-soft: 0 12px 34px rgba(27, 35, 31, 0.08);
  --radius: 8px;
  --max: 1180px;
  --narrow: 900px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
  overflow-x: hidden;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

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

a:hover {
  color: var(--teal);
}

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

:focus-visible {
  outline: 3px solid rgba(15, 118, 110, 0.34);
  outline-offset: 3px;
}

.hero-section {
  position: relative;
  padding: 74px 20px 58px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 6px;
  background: var(--forest);
}

.hero-inner {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  text-align: center;
}

.hero-inner > .project-logo {
  width: clamp(88px, 7vw, 118px) !important;
  height: auto !important;
  max-width: 118px !important;
  max-height: 120px;
  margin: 0 auto 16px;
  object-fit: contain;
  filter: drop-shadow(0 14px 24px rgba(27, 35, 31, 0.12));
}

.venue-pill,
.section-kicker {
  margin: 0 0 12px;
  color: var(--teal-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.venue-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  padding: 7px 13px;
  color: var(--forest-dark);
  background: #ffffff;
  border: 1px solid rgba(15, 117, 105, 0.18);
  border-radius: 999px;
  box-shadow: 0 8px 22px rgba(27, 35, 31, 0.06);
  font-size: 1.05rem;
  font-weight: 850;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1 {
  max-width: min(1500px, calc(100vw - 48px));
  margin: 0 auto 34px;
  color: var(--ink);
  font-size: clamp(2.55rem, 3.15vw, 3.05rem);
  line-height: 1.05;
  font-weight: 850;
  letter-spacing: 0;
}

h1 span {
  display: block;
  white-space: nowrap;
}

h2 {
  margin: 0;
  color: var(--ink);
  font-size: 2.05rem;
  line-height: 1.16;
  font-weight: 790;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  color: var(--ink);
  font-size: 1.15rem;
  line-height: 1.25;
  font-weight: 760;
  letter-spacing: 0;
}

.authors {
  max-width: 1120px;
  margin: 0 auto 24px;
  display: flex;
  justify-content: center;
  gap: 14px 24px;
  flex-wrap: wrap;
  font-size: 1.14rem;
  font-weight: 720;
  color: var(--muted-strong);
}

.authors span {
  display: inline-block;
  white-space: nowrap;
}

.authors a {
  color: var(--teal-dark);
}

sup {
  margin-left: 1px;
  color: var(--teal-dark);
  font-size: 0.66em;
  font-weight: 780;
  line-height: 0;
  vertical-align: super;
}

.authors sup {
  position: relative;
  top: -0.28em;
  margin-left: 2px;
  font-size: 0.62em;
}

.notes {
  max-width: 900px;
  margin: 0 auto;
  color: var(--muted);
}

.affiliation-grid {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 10px 24px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.45;
}

.affiliation-grid span {
  display: inline-block;
  white-space: nowrap;
}

.affiliation-grid sup {
  position: relative;
  top: -0.55em;
  margin-right: 3px;
  margin-left: 0;
  font-size: 0.58em;
  line-height: 0;
  vertical-align: baseline;
}

.notes {
  margin-top: 12px;
  font-size: 0.92rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.hero-actions {
  margin: 30px 0 42px;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 18px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(27, 35, 31, 0.04);
  font-weight: 760;
  line-height: 1.15;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.button svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.button:hover {
  transform: translateY(-1px);
  color: var(--teal-dark);
  border-color: rgba(15, 118, 110, 0.36);
  box-shadow: var(--shadow-soft);
}

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

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

.button-disabled,
.button-disabled:hover {
  pointer-events: none;
  cursor: not-allowed;
  opacity: 0.58;
  transform: none;
  box-shadow: 0 1px 0 rgba(27, 35, 31, 0.04);
}

.hero-figure {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.hero-figure img,
.paper-figure img {
  width: 100%;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.hero-figure figcaption,
.paper-figure figcaption {
  max-width: 900px;
  margin: 14px auto 0;
  color: var(--muted);
  font-size: 0.97rem;
  text-align: center;
}

.section {
  padding: 92px 20px;
  scroll-margin-top: 86px;
}

.band {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-inner {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
}

.section-inner.narrow {
  max-width: var(--narrow);
}

.section-heading {
  max-width: 800px;
  margin: 0 auto 42px;
  text-align: center;
}

.section-heading p:not(.section-kicker) {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.abstract-text {
  margin: 0;
  color: var(--muted-strong);
  font-size: 1.04rem;
  text-align: justify;
}

.abstract-layout {
  display: grid;
  grid-template-columns: 0.84fr 1.36fr;
  gap: 54px;
  align-items: start;
}

.abstract-heading {
  position: sticky;
  top: 24px;
  padding-left: 18px;
  border-left: 4px solid var(--sand);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.principle-card {
  position: relative;
  min-height: 220px;
  padding: 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.principle-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: var(--forest);
}

.principle-card:nth-child(2)::before {
  background: var(--sand);
}

.principle-card:nth-child(3)::before {
  background: var(--clay);
}

.principle-card:nth-child(2) .card-icon {
  color: var(--amber);
  background: #fff7ec;
  border-color: #ecd2ad;
}

.principle-card:nth-child(3) .card-icon {
  color: var(--rose);
  background: #fff3f5;
  border-color: #ebc6ce;
}

.card-icon {
  width: 42px;
  height: 42px;
  margin-bottom: 22px;
  display: inline-grid;
  place-items: center;
  color: var(--teal);
  background: #effaf7;
  border: 1px solid #c5e6df;
  border-radius: var(--radius);
}

.card-icon svg {
  width: 22px;
  height: 22px;
}

.principle-card p {
  margin: 12px 0 0;
  color: var(--muted);
}

.paper-figure {
  margin: 0;
}

.paper-figure img {
  box-shadow: none;
}

.method-layout {
  margin-top: 48px;
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 40px;
  align-items: center;
}

.method-copy {
  padding: 8px 0 8px 20px;
  border-left: 4px solid var(--clay);
}

.method-copy p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.04rem;
}

.compact-figure img {
  box-shadow: none;
}

.compact-figure figcaption {
  text-align: left;
}

.site-footer {
  padding: 32px 20px 44px;
  color: var(--muted);
  text-align: center;
  background: #fff;
}

.site-footer p {
  margin: 0;
}

.scroll-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--ink);
  border: 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 160ms ease, transform 160ms ease, background 160ms ease;
  cursor: pointer;
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.scroll-top:hover {
  background: var(--teal-dark);
}

.scroll-top svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 900px) {
  .hero-section {
    padding-top: 48px;
  }

  h1 {
    font-size: 2.18rem;
  }

  h2 {
    font-size: 1.78rem;
  }

  .hero-inner > .project-logo {
    width: 104px !important;
    max-width: 104px !important;
  }

  .principle-grid,
  .method-layout,
  .abstract-layout {
    grid-template-columns: 1fr;
  }

  .abstract-layout {
    gap: 24px;
  }

  .abstract-heading {
    position: static;
    padding-left: 0;
    border-left: 0;
    text-align: center;
  }

  .principle-card {
    min-height: auto;
  }

  .compact-figure figcaption {
    text-align: center;
  }

}

@media (max-width: 580px) {
  body {
    font-size: 15px;
  }

  .hero-section,
  .section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  h1 {
    max-width: 100%;
    font-size: 1.62rem;
    line-height: 1.13;
  }

  h1 span {
    display: inline;
    white-space: normal;
  }

  h2 {
    font-size: 1.45rem;
  }

  .hero-inner > .project-logo {
    width: 88px !important;
    max-width: 88px !important;
    margin-bottom: 14px;
  }

  .authors {
    font-size: 1rem;
    gap: 8px 12px;
  }

  .affiliation-grid {
    gap: 6px 14px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .abstract-text {
    text-align: left;
  }

  .scroll-top {
    right: 14px;
    bottom: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}