:root {
  --text: #2b2b2b;
  --muted: #616161;
  --accent: #a31f34;
  --button: #363636;
  --line: #dddddd;
  --soft: #f7f7f7;
  --width: 1040px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: #ffffff;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

.container {
  width: min(calc(100% - 40px), var(--width));
  margin-inline: auto;
}

.paper-header {
  padding-top: 72px;
  text-align: center;
}

.paper-header h1 {
  max-width: 1000px;
  margin: 0 auto;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.16;
  letter-spacing: -0.035em;
  font-weight: 700;
}

.authors {
  margin: 28px auto 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 5px 16px;
  color: var(--accent);
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 500;
}

sup {
  position: relative;
  top: -0.15em;
  font-size: 0.65em;
}

.affiliation {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.corresponding-authors {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  font-style: italic;
}

.institution-logos {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 34px;
}

.institution-logos a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
}

.institution-logos img {
  display: block;
  width: auto;
  height: 62px;
  object-fit: contain;
}

.institution-logos .mit-logo {
  height: 54px;
}

.institution-logos .snu-logo {
  height: 46px;
}

.institution-logos .yonsei-logo {
  height: 58px;
}

.lab-logos {
  width: min(100%, 760px);
  margin: 20px auto 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.lab-logo-link {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.3;
  text-decoration: none;
}

.lab-logo-visual {
  height: 88px;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lab-logo-visual img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.lab-logo-dark img {
  filter: brightness(0) saturate(100%);
}

.lab-logo-link > span:last-child {
  display: block;
  margin-top: 7px;
}

.resource-links {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 9px;
}

.resource-links a,
.resource-links .resource-link {
  min-height: 40px;
  padding: 8px 16px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #ffffff;
  background: var(--button);
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  transition: background 150ms ease, transform 150ms ease;
}

.resource-links a:hover {
  background: var(--accent);
  transform: translateY(-1px);
}

.resource-links .unavailable {
  cursor: default;
  opacity: 0.68;
}

.resource-links svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.teaser {
  margin-top: 60px;
}

.video-wrap {
  position: relative;
  width: 100%;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #111111;
  box-shadow: 0 3px 16px rgba(0, 0, 0, 0.12);
}

.video-wrap iframe,
.video-wrap video {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  object-fit: contain;
}

.teaser > h2 {
  max-width: 920px;
  margin: 38px auto 0;
  text-align: center;
  font-size: clamp(1.45rem, 3vw, 2.15rem);
  line-height: 1.35;
  letter-spacing: -0.025em;
  font-weight: 600;
}

.section {
  padding-top: 74px;
}

.section-title {
  margin: 0 0 24px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--accent);
  text-align: center;
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.section-intro {
  max-width: 900px;
  margin: 0 auto 28px;
  color: #3e3e3e;
  font-size: 1.05rem;
  text-align: left;
}

.abstract {
  max-width: 940px;
  margin-inline: auto;
  text-align: justify;
}

.abstract p {
  margin: 0 0 16px;
}

.figure {
  margin: 28px 0 0;
}

.figure-spaced {
  margin-top: 44px;
}

.figure > img,
.figure > video {
  width: 100%;
  height: auto;
  border: 1px solid #ececec;
  background: #ffffff;
}

.figure figcaption {
  max-width: 920px;
  margin: 11px auto 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
  text-align: center;
}

.figure figcaption strong {
  color: #383838;
}

.result-table-wrap {
  margin-top: 30px;
  overflow-x: auto;
}

.result-note {
  max-width: 900px;
  margin: 20px auto 0;
  padding: 14px 18px;
  border-left: 3px solid var(--accent);
  background: var(--soft);
  font-size: 0.95rem;
}

.result-note strong {
  color: var(--accent);
}

.viser-viewer {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #f4f4f4;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.viser-toolbar {
  min-height: 58px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.viser-toolbar label {
  font-size: 0.88rem;
  font-weight: 600;
}

.viser-toolbar select {
  min-width: 190px;
  padding: 8px 34px 8px 11px;
  border: 1px solid #bdbdbd;
  border-radius: 3px;
  color: var(--text);
  background: #ffffff;
  font: inherit;
  font-size: 0.9rem;
}

.viser-toolbar select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.viser-hint {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.82rem;
}

.viser-frame-wrap {
  position: relative;
  width: 100%;
  min-height: 470px;
  background: #f2f2f4;
}

.viser-content {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
  align-items: stretch;
}

.viser-frame-wrap iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.viser-loading {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  color: var(--muted);
  background: #f2f2f4;
  font-size: 0.9rem;
}

.viser-loading[hidden] {
  display: none;
}

.grasp-score-panel {
  min-width: 0;
  padding: 17px 16px 13px;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line);
  background: #ffffff;
}

.grasp-score-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.88rem;
  font-weight: 600;
}

.grasp-score-header output {
  min-width: 3.2em;
  color: var(--accent);
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

#grasp-score-chart {
  width: 100%;
  min-height: 360px;
  flex: 1;
}

.grasp-score-legend {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.74rem;
}

.grasp-score-legend i {
  width: 17px;
  height: 3px;
  margin-right: 5px;
  display: inline-block;
  vertical-align: middle;
  background: var(--accent);
}

.viser-note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.84rem;
  text-align: center;
}

.demo-group {
  margin-top: 52px;
}

.demo-group-title {
  margin: 0 0 8px;
  font-size: 1.45rem;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.demo-group-intro {
  max-width: 900px;
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 0.96rem;
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 38px 24px;
}

.hardware-video-grid {
  margin-top: 38px;
}

.demo-card-wide {
  max-width: 900px;
  margin-inline: auto;
}

.demo-card video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  border: 1px solid #e4e4e4;
  background: #111111;
}

.demo-card h4 {
  margin: 12px 0 5px;
  font-size: 1.06rem;
  line-height: 1.35;
}

.demo-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.96rem;
}

th,
td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  text-align: center;
}

th:first-child,
td:first-child {
  width: 58%;
  text-align: left;
}

thead th {
  color: #ffffff;
  background: #414141;
  font-weight: 600;
}

tbody tr:nth-child(even) {
  background: var(--soft);
}

td strong {
  color: var(--accent);
}

td span {
  color: var(--muted);
  font-size: 0.86em;
}

.footer {
  margin-top: 80px;
  padding: 28px 0 45px;
  border-top: 1px solid var(--line);
  color: #777777;
  font-size: 0.83rem;
  text-align: center;
}

.footer p {
  max-width: 700px;
  margin: 0 auto;
}

@media (max-width: 700px) {
  .container {
    width: min(calc(100% - 28px), var(--width));
  }

  .paper-header {
    padding-top: 44px;
  }

  .paper-header h1 {
    font-size: clamp(1.75rem, 8vw, 2.35rem);
  }

  .authors {
    margin-top: 22px;
    font-size: 0.98rem;
  }

  .affiliation {
    font-size: 0.84rem;
  }

  .institution-logos {
    gap: 24px;
  }

  .institution-logos img {
    height: 54px;
  }

  .institution-logos .mit-logo {
    height: 47px;
  }

  .institution-logos .snu-logo {
    height: 40px;
  }

  .institution-logos .yonsei-logo {
    height: 49px;
  }

  .lab-logos {
    gap: 8px;
  }

  .lab-logo-link {
    font-size: 0.68rem;
  }

  .lab-logo-visual {
    height: 64px;
    padding: 10px;
  }

  .resource-links a,
  .resource-links .resource-link {
    min-height: 38px;
    padding: 8px 13px;
    font-size: 0.8rem;
  }

  .teaser {
    margin-top: 42px;
  }

  .teaser > h2 {
    margin-top: 26px;
  }

  .section {
    padding-top: 58px;
  }

  .section-title {
    margin-bottom: 20px;
  }

  .section-intro,
  .abstract {
    font-size: 0.96rem;
    text-align: left;
  }

  th,
  td {
    padding: 10px 9px;
    font-size: 0.82rem;
  }

  th:first-child,
  td:first-child {
    width: 52%;
  }

  .figure figcaption {
    font-size: 0.82rem;
  }

  .demo-group {
    margin-top: 42px;
  }

  .viser-toolbar {
    align-items: stretch;
    flex-direction: column;
    gap: 6px;
  }

  .viser-toolbar select {
    width: 100%;
  }

  .viser-hint {
    margin: 2px 0 0;
  }

  .viser-frame-wrap {
    aspect-ratio: 4 / 3;
    min-height: 0;
  }

  .viser-content {
    grid-template-columns: 1fr;
  }

  .grasp-score-panel {
    min-height: 300px;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  #grasp-score-chart {
    min-height: 235px;
  }

  .demo-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

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

  * {
    transition: none !important;
  }
}