:root {
  --bg: #d9e9f5;
  --surface: #ffffff;
  --surface-blue: #e9f4fb;
  --surface-deep: #0b2a4a;
  --ink: #102033;
  --muted: #53677d;
  --line: #c8dceb;
  --accent: #1976b8;
  --accent-strong: #075a97;
  --accent-soft: #d7ecfa;
  --cyan: #22a6c8;
  --gold: #c98b28;
  --danger: #a95d59;
  --shadow: 0 22px 58px rgba(17, 68, 110, 0.12);
  --nav-height: 72px;
  --page-max: 1120px;
  --text-max: 880px;
  --page-gutter: 40px;
  --section-pad-y: 78px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  scroll-snap-type: y mandatory;
}

body {
  height: 100%;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, #d9e9f5 0%, #edf6fb 42%, #d8eaf6 100%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

main {
  padding: 0;
}

a {
  color: var(--accent-strong);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(243, 248, 252, 0.88);
  border-bottom: 1px solid rgba(173, 203, 224, 0.75);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--page-max);
  min-height: var(--nav-height);
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  letter-spacing: 0;
}

.brand-logo {
  display: block;
  width: auto;
  max-width: none;
  height: 58px;
  object-fit: contain;
  filter: drop-shadow(0 8px 16px rgba(17, 68, 110, 0.08));
  transition: transform 160ms ease;
}

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

.brand:hover .brand-logo {
  transform: translateY(-1px);
}

.brand-name {
  color: #102033;
  font-size: 1.05rem;
  font-weight: 880;
  line-height: 1;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  justify-content: flex-end;
  font-size: 0.94rem;
}

.nav-links a {
  color: #40586f;
}

.container {
  width: min(var(--page-max), calc(100% - var(--page-gutter)));
  margin: 0 auto;
}

.narrow {
  width: min(var(--text-max), calc(100% - var(--page-gutter)));
}

.hero {
  display: grid;
  height: calc(100vh - var(--nav-height));
  min-height: calc(100vh - var(--nav-height));
  align-items: center;
  width: 100%;
  margin: 0;
  padding: 72px 0 62px;
  overflow-y: auto;
  overscroll-behavior-y: auto;
  color: #ffffff;
  background-color: #dcecf7;
  background-image:
    linear-gradient(90deg, rgba(7, 32, 57, 0.72) 0%, rgba(10, 62, 103, 0.42) 43%, rgba(8, 57, 93, 0.10) 100%),
    url("../../assets/hero-cover.png");
  background-position: center, center;
  background-repeat: no-repeat;
  background-size: cover, cover;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.hero-inner {
  text-align: center;
}

.section-kicker {
  display: inline-flex;
  margin: 0 0 16px;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.12;
  letter-spacing: 0;
}

h1 {
  max-width: 1000px;
  margin: 0 auto;
  font-size: clamp(2rem, 4.5vw, 4.4rem);
  font-weight: 870;
}

.hero h1 {
  max-width: 1080px;
  margin: 0 auto;
  font-size: clamp(2.35rem, 3.75vw, 3.7rem);
  text-align: center;
  text-shadow: 0 3px 24px rgba(5, 24, 42, 0.36);
}

.hero-logo {
  display: block;
  width: clamp(116px, 11vw, 148px);
  height: auto;
  margin: 0 auto 16px;
  filter: drop-shadow(0 18px 28px rgba(3, 25, 46, 0.28));
  transform: translateY(-12px);
}

h2 {
  font-size: clamp(1.68rem, 2.6vw, 2.55rem);
  font-weight: 820;
}

h3 {
  font-size: 1.12rem;
  font-weight: 800;
}

.authors {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.2rem;
}

.hero .authors {
  max-width: 720px;
  margin-right: auto;
  margin-left: auto;
  text-shadow: 0 2px 16px rgba(5, 24, 42, 0.42);
}

.hero .authors {
  margin-top: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 30px;
}

.hero .actions {
  justify-content: center;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  color: #0d3457;
  background: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.84);
  border-radius: 999px;
  box-shadow: 0 10px 25px rgba(8, 39, 69, 0.16);
  font-size: 1rem;
  font-weight: 760;
  text-decoration: none;
}

.button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.button.primary {
  color: #ffffff;
  background: #1683c8;
  border-color: #60c4ef;
}

.button.muted {
  color: rgba(255, 255, 255, 0.76);
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: none;
}

.section {
  position: relative;
  display: grid;
  align-content: center;
  align-content: safe center;
  width: 100%;
  height: calc(100vh - var(--nav-height));
  min-height: calc(100vh - var(--nav-height));
  margin: 0;
  padding: var(--section-pad-y) 0;
  overflow-x: hidden;
  overflow-y: auto;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  overscroll-behavior-y: auto;
}

.page-sheet {
  scroll-snap-align: start;
  scroll-snap-stop: always;
  scroll-margin-top: 0;
  opacity: 0;
  transform: translateY(96px) scale(0.955);
  filter: blur(8px);
  transition:
    opacity 720ms ease,
    filter 820ms ease,
    transform 900ms cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 900ms cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform, filter;
}

.page-sheet::after {
  position: absolute;
  top: 16px;
  right: 18px;
  width: 74px;
  height: 52px;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.0) 48%, rgba(255, 255, 255, 0.55) 49%, rgba(255, 255, 255, 0.8) 100%);
  border-top-right-radius: 14px;
  content: "";
  opacity: 0.5;
}

.page-sheet.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
  box-shadow: none;
}

.page-sheet.is-visible.is-current {
  transform: translateY(0) scale(1);
  box-shadow: none;
}

.video-section.page-sheet {
  opacity: 1;
  transform: none;
  filter: none;
  transition: none;
  will-change: auto;
}

.video-section.page-sheet.is-visible,
.video-section.page-sheet.is-visible.is-current {
  transform: none;
  filter: none;
}

.video-section.page-sheet::after {
  display: none;
}

.page-sheet > .container {
  position: relative;
  z-index: 1;
}

.article-section {
  background: var(--surface);
}

.article-grid,
.story-grid,
.figure-story {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.82fr);
  gap: 44px;
  align-items: center;
}

.article-copy p,
.story-copy p,
.center-heading p,
.figure-story p {
  color: var(--muted);
  font-size: 1.06rem;
}

.article-copy p:last-child,
.story-copy p:last-child,
.center-heading p:last-child,
.figure-story p:last-child {
  margin-bottom: 0;
}

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

.result-stat {
  min-height: 150px;
  padding: 22px;
  background: linear-gradient(180deg, #ffffff, #f2f8fc);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 16px 42px rgba(17, 68, 110, 0.08);
}

.result-stat span {
  display: block;
  color: var(--accent-strong);
  font-size: clamp(1.85rem, 3vw, 2.55rem);
  font-weight: 880;
  line-height: 1;
}

.result-stat p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.video-section {
  color: #ffffff;
  background:
    linear-gradient(145deg, #082946, #0d67a1);
  text-align: center;
}

.video-section .section-kicker,
.video-section h2 {
  color: #ffffff;
}

.video-frame {
  aspect-ratio: 16 / 9;
  margin-top: 28px;
  overflow: hidden;
  background: #031728;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 12px;
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.23);
}

.project-video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.story-band,
.results-section {
  background: var(--surface-blue);
}

.center-heading {
  margin-bottom: 36px;
  text-align: center;
}

.media-frame {
  margin: 0;
  padding: 14px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.media-frame.large {
  margin-bottom: 34px;
}

.framework-figure {
  padding: 0;
  overflow: hidden;
}

.media-shell {
  aspect-ratio: var(--ratio);
  width: 100%;
  overflow: hidden;
  background: #ffffff;
  border: 1px solid #e0edf5;
  border-radius: 8px;
}

.media-shell object,
.media-shell iframe,
.figure-link,
.figure-link img {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.figure-link {
  background: #ffffff;
}

.figure-link img {
  object-fit: contain;
}

.framework-figure .media-shell {
  border: 0;
  border-radius: 12px 12px 0 0;
  min-height: 0;
}

.framework-figure .figure-link img {
  object-fit: cover;
}

.media-frame.framework-figure figcaption {
  margin-top: 0;
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line);
}

.media-frame figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
}

.process-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 34px;
}

.process-strip article {
  min-height: 176px;
  padding: 24px;
  background: #f6fbff;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.process-strip span {
  display: block;
  margin-bottom: 16px;
  color: var(--cyan);
  font-weight: 900;
}

.process-strip p,
.case p {
  margin: 12px 0 0;
  color: var(--muted);
}

.table-wrap {
  overflow-x: auto;
  margin-bottom: 42px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  min-width: 900px;
  border-collapse: collapse;
  font-size: 0.94rem;
}

caption {
  padding: 18px 20px 0;
  color: var(--muted);
  text-align: left;
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: center;
  vertical-align: middle;
  white-space: nowrap;
}

thead th {
  color: #163756;
  background: #e8f3fb;
  font-weight: 800;
}

tbody tr:last-child td {
  border-bottom: 0;
}

.highlight td {
  color: #062f54;
  background: #d9eefb;
  font-weight: 820;
}

.delta {
  display: inline-block;
  margin-left: 3px;
  font-size: 0.72em;
  font-weight: 820;
  line-height: 1;
  vertical-align: sub;
}

.delta.positive {
  color: #157a4f;
}

.delta.negative {
  color: #a64f49;
}

.figure-story {
  grid-template-columns: minmax(280px, 0.5fr) minmax(0, 1fr);
  margin-top: 32px;
}

.figure-story.reverse {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.5fr);
}

.figure-story.reverse article {
  order: 2;
}

.case-grid {
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

.case {
  align-self: start;
  flex: 1 1 0;
  min-width: 0;
  background: #f6fbff;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.case[open] {
  background: #ffffff;
  box-shadow: var(--shadow);
}

.case summary {
  position: relative;
  display: block;
  min-height: 258px;
  padding: 24px 24px 66px;
  cursor: pointer;
  list-style: none;
}

.case summary p {
  margin-top: 20px;
}

.case summary::-webkit-details-marker {
  display: none;
}

.case summary:focus-visible {
  outline: 3px solid rgba(25, 118, 184, 0.35);
  outline-offset: -3px;
}

.case-type {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--accent-strong);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.case-action {
  display: inline-flex;
  position: absolute;
  left: 24px;
  bottom: 24px;
  margin: 0;
  padding: 0;
  color: var(--accent-strong);
  font-size: 0.9rem;
  font-weight: 800;
}

.case-action::after {
  content: "+";
  margin-left: 8px;
  font-weight: 900;
}

.case[open] .case-action::after {
  content: "-";
}

.case-detail {
  padding: 0 24px 24px;
  border-top: 1px solid var(--line);
}

.case-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 20px 0;
}

.case-stats div {
  padding: 12px;
  background: #eef7fd;
  border: 1px solid #d4e8f5;
  border-radius: 8px;
  text-align: center;
}

.case-stats dt {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-stats dd {
  margin: 4px 0 0;
  color: var(--accent-strong);
  font-size: 1.18rem;
  font-weight: 850;
  white-space: nowrap;
}

.case-detail pre {
  margin: 10px 0 18px;
  padding: 14px;
  background: #f3f8fc;
  font-size: 0.82rem;
  white-space: pre-wrap;
}

.case-takeaway {
  padding: 14px;
  background: #e9f4fb;
  border: 1px solid #c8dceb;
  border-radius: 8px;
  font-weight: 700;
}

.bib-section {
  background: #ffffff;
}

pre {
  overflow-x: auto;
  padding: 20px;
  color: #0e2a44;
  background: #eef6fb;
  border: 1px solid var(--line);
  border-radius: 12px;
  line-height: 1.45;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92rem;
}

.footer {
  width: 100%;
  margin: 0;
  padding: 36px 0;
  color: #526779;
  background: #e8f2f8;
  border: 0;
  border-radius: 0;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  text-align: center;
}

.footer p {
  margin: 0;
  font-size: 0.95rem;
}

@media (min-width: 1440px) {
  :root {
    --page-max: 1320px;
    --text-max: 980px;
    --page-gutter: 72px;
    --section-pad-y: 88px;
  }

  .article-grid,
  .story-grid,
  .figure-story {
    gap: 56px;
  }

  .process-strip,
  .case-grid {
    gap: 24px;
  }

  .case summary {
    min-height: 272px;
    padding: 26px 26px 70px;
  }

  .case-action {
    left: 26px;
    bottom: 26px;
  }
}

@media (min-width: 1920px) {
  :root {
    --page-max: 1520px;
    --text-max: 1080px;
    --page-gutter: 120px;
    --section-pad-y: 104px;
  }

  .hero h1 {
    max-width: 1120px;
  }

  .article-grid,
  .story-grid,
  .figure-story {
    gap: 68px;
  }

  .process-strip,
  .case-grid {
    gap: 28px;
  }

  .case summary {
    min-height: 286px;
    padding: 30px 30px 78px;
  }

  .case-action {
    left: 30px;
    bottom: 30px;
  }
}

@media (max-width: 980px) {
  .article-grid,
  .story-grid,
  .figure-story,
  .figure-story.reverse {
    grid-template-columns: 1fr;
  }

  .figure-story.reverse article {
    order: 0;
  }

  .process-strip,
  .case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .case-grid {
    flex-wrap: wrap;
  }

  .case {
    flex: 1 1 calc(50% - 12px);
  }
}

@media (max-width: 700px) {
  :root {
    --nav-height: 118px;
    --page-gutter: 28px;
    --section-pad-y: 58px;
  }

  html {
    scroll-padding-top: var(--nav-height);
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 14px 20px;
  }

  .brand-logo {
    height: 50px;
  }

  .nav-links {
    justify-content: flex-start;
    gap: 12px;
    font-size: 0.9rem;
  }

  .container,
  .narrow {
    width: min(var(--page-max), calc(100% - var(--page-gutter)));
  }

  .hero {
    padding: 62px 0 44px;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    min-height: calc(100vh - var(--nav-height));
    border-radius: 0;
  }

  .section {
    width: 100%;
    height: calc(100vh - var(--nav-height));
    min-height: calc(100vh - var(--nav-height));
    margin: 0;
    padding: var(--section-pad-y) 0;
    border-radius: 0;
  }

  .page-sheet {
    transform: translateY(58px) scale(0.98);
  }

  .abstract-panel,
  .process-strip,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .case {
    flex-basis: 100%;
  }

  .result-stat,
  .process-strip article {
    min-height: auto;
  }

  .case summary {
    min-height: auto;
    padding: 24px;
  }

  .case-action {
    position: static;
    margin-top: 18px;
  }

  .media-frame {
    padding: 10px;
  }

  .media-shell {
    min-height: 230px;
  }

  .video-frame {
    min-height: 260px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
    scroll-snap-type: none;
  }

  .page-sheet {
    opacity: 1;
    transform: none;
    filter: none;
    transition: none;
  }

  .page-sheet.is-visible.is-current {
    transform: none;
  }
}