:root {
  color-scheme: light;
  --ink: #1b2d36;
  --muted: #566a73;
  --accent: #087e8b;
  --line: #dce6e8;
  --pale: #eef6f6;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; font-family: Inter, "Helvetica Neue", Arial, sans-serif; line-height: 1.68; }
h1, h2, h3 { line-height: 1.25; letter-spacing: -.025em; }
.hero { padding: 58px 24px 38px; text-align: center; }
.hero-inner, main { width: min(1100px, 100%); margin: 0 auto; }
h1 { max-width: 1100px; margin: 0 auto 20px; font-size: clamp(2rem, 4.2vw, 3.25rem); }
.authors { margin: 0 auto 3px; font-size: 1.08rem; font-weight: 600; }
.authors sup, .affiliations sup { color: var(--accent); }
.affiliations { margin: 0 auto; color: var(--muted); font-size: .9rem; }
.actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 24px 0 34px; }
.button { display: inline-block; border: 1px solid #333; border-radius: 999px; padding: 8px 19px; color: white; background: #333; font-size: .9rem; font-weight: 650; text-decoration: none; }
.button:hover { background: #405a65; }
.button.primary { border-color: var(--accent); background: var(--accent); }
.button.unavailable { border-style: dashed; color: #586b73; background: #fff; cursor: default; }
figure { margin: 0; }
.hero-figure { width: min(880px, 100%); margin: 0 auto; }
.hero-figure img, .figure img { display: block; width: 100%; height: auto; }
.section { padding: 60px 24px; }
.section h2 { margin: 0 0 14px; text-align: center; font-size: clamp(1.65rem, 3vw, 2.15rem); }
.narrow { max-width: 850px; margin: 0 auto; }
.narrow > p { color: #40545e; }
.research-summary { max-width: 850px; margin: -24px auto 30px; padding: 0 24px; text-align: center; }
.research-summary h2 { margin: 0 0 6px; font-size: clamp(1.2rem, 2.4vw, 1.55rem); line-height: 1.4; }
.research-summary p { margin: 0; color: var(--muted); }
.video-section { max-width: 1020px; margin: auto; }
.section-lead { max-width: 800px; margin: 0 auto 28px; color: var(--muted); text-align: center; }
video { display: block; width: 100%; max-height: 620px; border-radius: 12px; background: #111; box-shadow: 0 10px 30px rgba(18, 43, 50, .12); }
.method-section { padding-top: 42px; }
.method-figure { width: 100%; max-width: 1080px; margin: 24px auto 30px; }
.method-copy { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.method-copy article { padding: 16px 18px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.retraining-note { margin-top: 18px; padding: 18px 22px; border-left: 4px solid var(--accent); border-radius: 8px; background: var(--pale); }
.retraining-note h3 { margin: 0 0 6px; font-size: 1.08rem; }
.retraining-note p { margin: 0; color: #40545e; font-size: .94rem; }
.paper-figure { margin: 24px auto 0; }
.paper-figure img { display: block; width: 100%; height: auto; margin: 0 auto; }
.paper-figure figcaption { max-width: 860px; margin: 10px auto 0; color: var(--muted); font-size: .86rem; line-height: 1.5; }
.method-copy h3, .result-card h3 { margin: 0 0 7px; font-size: 1.12rem; }
.method-copy p, .result-card p { margin: 0; color: #40545e; font-size: .94rem; }
.shaded { position: relative; left: 50%; width: 100vw; max-width: 100vw; margin-left: 0; padding: 62px 24px; transform: translateX(-50%); background: var(--pale); }
.shaded-inner { max-width: 1080px; margin: 0 auto; }
.results-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: stretch; }
.result-card { min-width: 0; display: flex; flex-direction: column; padding: 22px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.result-card .figure { margin-top: 20px; }
.result-card .figure:last-child { margin-top: auto; padding-top: 20px; }
.result-card figcaption { margin-top: 9px; color: var(--muted); font-size: .84rem; line-height: 1.5; }
.dynamics-evaluation { position: relative; left: 50%; width: 120.75%; max-width: 1183px; margin: 24px 0 0; transform: translateX(-50%); }
.result-note { max-width: 860px; margin: 24px auto 0; color: var(--muted); font-size: .92rem; text-align: center; }
.rollout-section { max-width: 1100px; margin: 0 auto; }
.rollout-group { margin: 34px 0 0; }
.rollout-group-heading { margin: 0 auto 16px; text-align: center; }
.rollout-group-heading h3 { margin: 0 0 6px; font-size: 1.24rem; }
.rollout-group-heading p { max-width: 800px; margin: 0 auto; color: var(--muted); font-size: .9rem; }
.rollout-grid { display: grid; gap: 16px; }
.rollout-grid.two-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.rollout-grid.three-up { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.task-setup-section { max-width: 1100px; margin: 0 auto; }
.rollout-card { min-width: 0; padding: 16px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.rollout-card h4 { margin: 0 0 10px; font-size: .98rem; }
.rollout-card p { margin: 9px 0 0; color: var(--muted); font-size: .84rem; }
.rollout-card video { max-height: none; border-radius: 7px; box-shadow: none; }
.single-video { max-width: 820px; margin: 0 auto; }
.simulation-section { max-width: 920px; margin: 0 auto; }
pre { overflow-x: auto; margin: 20px 0 0; padding: 20px 22px; border-radius: 10px; color: #e0edef; background: #203740; font-size: .86rem; line-height: 1.65; }
footer { padding: 22px; color: #d5e0e2; background: #203740; text-align: center; font-size: .84rem; }
footer p { margin: 0; }
@media (max-width: 760px) {
  .hero { padding: 42px 18px 30px; }
  .section { padding: 48px 19px; }
  .shaded { padding: 48px 19px; }
  .method-copy, .results-grid, .rollout-grid.two-up, .rollout-grid.three-up { grid-template-columns: 1fr; }
}