@import url('https://fonts.googleapis.com/css2?family=Newsreader:opsz,wght@6..72,500;6..72,600&family=Source+Sans+3:wght@400;500;600;700&display=swap');

:root {
  --sp-ink: #1f314b;
  --sp-muted: #65758b;
  --sp-line: #d9e0e6;
  --sp-paper: #f7f2e9;
  --sp-white: #fffdfa;
  --sp-accent: #c98946;
  --sp-accent-soft: #faeedf;
  --sp-jade: #2a877f;
  --sp-jade-soft: #e7f3f1;
  --sp-blue-soft: #edf4fa;
  --sp-shadow: 0 14px 34px rgba(22, 39, 61, 0.06);
  --sp-radius: 20px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--sp-ink);
  background:
    radial-gradient(circle at top right, rgba(201, 137, 70, 0.09), transparent 24rem),
    radial-gradient(circle at top left, rgba(42, 135, 127, 0.08), transparent 28rem),
    linear-gradient(180deg, #faf6ef 0%, #f7f2e9 42%, #fcfbf8 100%);
  line-height: 1.68;
}

body,
p,
li,
td,
th,
figcaption,
.navbar,
.showcase-caption,
.notation-item,
.quick-card,
.code-card,
.example-block {
  font-family: "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

.quarto-title-banner,
.quarto-title-block,
#quarto-search,
.quarto-search-button {
  display: none !important;
}

.navbar {
  background: rgba(247, 242, 233, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--sp-line);
  box-shadow: none;
}

.navbar-brand,
.navbar-nav .nav-link {
  color: var(--sp-ink) !important;
}

.navbar-brand {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.navbar-nav .nav-link {
  font-size: 0.95rem;
  font-weight: 600;
}

.navbar-nav .nav-link:hover,
a:hover {
  color: #15263c !important;
}

main.content,
.page-columns,
.page-layout-full {
  background: transparent;
}

.home-shell,
.page-content {
  width: min(1180px, calc(100vw - 2.4rem));
  margin: 0 auto;
}

.home-shell {
  padding: 2.4rem 0 4rem;
}

.home-layout {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 1.6rem;
  align-items: start;
}

.home-rail {
  position: sticky;
  top: 5.8rem;
  align-self: start;
  padding-top: 0.45rem;
}

.home-rail h2 {
  margin: 0 0 0.85rem;
  font-family: "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sp-muted);
}

.home-rail ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.home-rail a {
  display: inline-block;
  color: var(--sp-ink);
  text-decoration: none;
  font-size: 0.97rem;
  font-weight: 600;
}

.home-main {
  min-width: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(250px, 0.78fr) minmax(340px, 1fr);
  gap: 1.25rem;
  align-items: start;
  margin: 0 auto 2.4rem;
  padding: 1.9rem 1.95rem;
  background: rgba(255, 253, 250, 0.9);
  border: 1px solid var(--sp-line);
  border-radius: 24px;
  box-shadow: var(--sp-shadow);
}

.hero-copy {
  max-width: 28rem;
}

.section-label {
  display: inline-block;
  margin-bottom: 0.95rem;
  padding: 0.35rem 0.72rem;
  border-radius: 999px;
  background: var(--sp-jade-soft);
  color: var(--sp-jade);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-name,
h1,
h2,
h3 {
  font-family: "Newsreader", "Iowan Old Style", "Times New Roman", serif;
  color: var(--sp-ink);
  letter-spacing: -0.02em;
  font-weight: 600;
}

.hero-name {
  font-size: clamp(2.9rem, 5.1vw, 4.8rem);
  line-height: 0.92;
  margin: 0 0 0.75rem;
  max-width: none;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.hero-logo {
  width: min(220px, 58vw);
  margin: 0 0 0.95rem;
}

.hero-logo p {
  margin: 0;
}

.hero-logo img {
  display: block;
  width: 100%;
  height: auto;
}

.hero-copy p {
  max-width: 27rem;
  margin: 0 0 0.8rem;
  color: #31445f;
  font-size: 1.06rem;
  line-height: 1.56;
}

.paper-meta {
  margin: 0.55rem 0 0;
  color: var(--sp-muted);
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.42;
}

.paper-meta p {
  margin: 0;
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.1rem;
}

.inline-links a {
  display: inline-flex;
  align-items: center;
  padding: 0.48rem 0.8rem;
  border-radius: 999px;
  background: var(--sp-blue-soft);
  color: var(--sp-ink);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.18s ease, transform 0.18s ease;
}

.inline-links a:hover {
  background: var(--sp-accent-soft);
  text-decoration: none;
  transform: translateY(-1px);
}

.code-card,
.quick-card,
.notation-item,
.reference-item,
.example-block,
.showcase-lead,
.showcase-side {
  background: var(--sp-white);
  border: 1px solid var(--sp-line);
  border-radius: var(--sp-radius);
  box-shadow: var(--sp-shadow);
}

.code-card {
  padding: 1rem 1rem 0.95rem;
  border-top: 4px solid var(--sp-accent);
  background: linear-gradient(180deg, #fffdf9 0%, #fbfaf6 100%);
}

.code-card > p:first-child,
.quick-card > p:first-child {
  margin: 0 0 0.72rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--sp-ink);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

pre {
  margin: 0;
  padding: 0;
  background: transparent !important;
  border: 0 !important;
}

pre code,
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

h2.section-heading,
.section-heading {
  font-size: 1.52rem;
  margin: 0 0 0.9rem;
}

.method-panel {
  max-width: 860px;
  margin: 0 0 2.15rem;
  padding: 0.95rem 1.15rem;
  border-left: 4px solid var(--sp-jade);
  border-radius: 0 16px 16px 0;
  background: rgba(255, 253, 250, 0.72);
  color: #31445f;
}

.method-panel p {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.58;
}

.method-panel p + p {
  margin-top: 0.72rem;
}

.feature-stack {
  display: grid;
  gap: 1rem;
  margin-bottom: 2.2rem;
}

.feature-panel {
  padding: 0.95rem 0.95rem 0.82rem;
  background: var(--sp-white);
  border: 1px solid var(--sp-line);
  border-radius: var(--sp-radius);
  box-shadow: var(--sp-shadow);
}

.feature-panel-atlas {
  border-top: 4px solid var(--sp-accent);
}

.feature-panel-ifu {
  border-top: 4px solid var(--sp-jade);
}

.feature-panel > p {
  margin: 0;
}

.feature-panel img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  align-items: stretch;
  margin-bottom: 2.2rem;
}

.showcase-lead,
.showcase-side {
  display: flex;
  flex-direction: column;
  padding: 0.9rem 0.9rem 0.82rem;
  min-height: 100%;
}

.showcase-lead {
  border-top: 4px solid var(--sp-accent);
}

.showcase-side {
  border-top: 4px solid var(--sp-jade);
}

.showcase-frame {
  width: 100%;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--sp-line);
  background: #f8f5ef;
}

.showcase-frame-wide {
  aspect-ratio: 16 / 7.6;
}

.showcase-frame > p {
  height: 100%;
  margin: 0;
}

.showcase-frame > p > img {
  height: 100%;
}

.showcase-frame img,
.showcase-side img,
.example-block img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
}

.showcase-grid figure,
.showcase-grid p,
.kinematics-pair p {
  margin: 0;
}

.showcase-grid figcaption {
  display: none;
}

.showcase-caption {
  margin-top: auto;
  padding-top: 0.75rem;
  font-size: 0.95rem;
  color: var(--sp-muted);
  line-height: 1.45;
}

.kinematics-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.kinematics-pair > p {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  margin: 0;
}

.kinematics-slice {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center center;
  border-radius: 12px;
  border: 1px solid var(--sp-line);
  background: #f8f5ef;
}

.notation-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.58rem;
  margin-bottom: 2.1rem;
}

.notation-strip > p {
  display: flex;
  flex-wrap: wrap;
  gap: 0.58rem;
  margin: 0;
}

.notation-table {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 2rem;
}

.notation-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  padding: 0.82rem 0.95rem;
  background: var(--sp-white);
  border: 1px solid var(--sp-line);
  border-radius: 16px;
  box-shadow: var(--sp-shadow);
}

.notation-symbol code {
  display: inline-block;
  padding: 0.24rem 0.56rem;
  border-radius: 999px;
  background: var(--sp-blue-soft);
  color: var(--sp-ink);
  font-size: 0.95rem;
}

.notation-meaning {
  color: #31445f;
  line-height: 1.45;
}

.notation-strip code,
.reference-item code {
  display: inline-block;
  padding: 0.24rem 0.52rem;
  border-radius: 999px;
  background: var(--sp-blue-soft);
  color: var(--sp-ink);
  font-size: 0.93rem;
}

.quick-grid,
.reference-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.function-list {
  display: grid;
  gap: 0.8rem;
  margin: 1.1rem 0 2rem;
}

.function-item {
  display: grid;
  grid-template-columns: minmax(210px, 0.38fr) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  padding: 0.95rem 1.05rem;
  background: var(--sp-white);
  border: 1px solid var(--sp-line);
  border-radius: 16px;
  box-shadow: var(--sp-shadow);
}

.function-call code {
  display: inline-block;
  padding: 0.26rem 0.56rem;
  border-radius: 999px;
  background: var(--sp-blue-soft);
  color: var(--sp-ink);
  font-size: 0.93rem;
}

.function-body {
  color: #31445f;
  line-height: 1.48;
}

.function-body p,
.function-call p {
  margin: 0;
}

.quick-card {
  padding: 1rem 1.05rem;
  margin-bottom: 2rem;
  border-top: 4px solid var(--sp-jade);
}

.example-block {
  padding: 1.1rem;
  margin-bottom: 1.5rem;
  border-top: 4px solid var(--sp-accent);
}

.example-block h2 {
  margin-top: 0;
  margin-bottom: 0.8rem;
  font-size: 1.48rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.97rem;
  background: var(--sp-white);
}

th,
td {
  padding: 0.8rem 0.85rem;
  border-bottom: 1px solid var(--sp-line);
}

th {
  text-align: left;
  color: var(--sp-ink);
  font-weight: 600;
}

figcaption {
  color: var(--sp-muted);
}

.page-footer {
  border-top: 1px solid var(--sp-line);
  background: transparent;
}

@media (max-width: 980px) {
  .home-shell,
  .page-content {
    width: min(100vw - 1.2rem, 1100px);
  }

  .home-layout,
  .home-rail,
  .hero-grid,
  .showcase-grid,
  .notation-grid,
  .quick-grid,
  .reference-list,
  .function-item,
  .notation-row {
    grid-template-columns: 1fr;
  }

  .home-layout {
    display: block;
  }

  .home-rail {
    position: static;
    margin-bottom: 1.1rem;
    padding-top: 0;
  }

  .home-rail ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem 0.9rem;
  }

  .hero-grid {
    padding: 1.5rem;
  }

  .hero-name {
    font-size: clamp(2.55rem, 12vw, 4rem);
    max-width: none;
  }

  .hero-copy p {
    font-size: 1.04rem;
  }

  .kinematics-pair {
    grid-template-columns: 1fr 1fr;
  }
}