.source-note {
  margin: 38px 0 0 calc(50% + 4vw);
  color: var(--muted);
  font-size: .68rem;
}

.insight-list article {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.insight-list span {
  color: var(--accent);
  font-size: .65rem;
  letter-spacing: .12em;
}

.insight-list h3 {
  margin: 12px 0;
  font: 400 1.45rem "Gowun Batang", serif;
}

.insight-list p {
  color: var(--muted);
  line-height: 1.75;
}

.mini-label { color: var(--accent); font-size: .65rem; letter-spacing: .13em; }
.site-header .logo { font-size: clamp(.9rem, 1.35vw, 1.2rem); letter-spacing: -.04em; }
.hero h1 em { display: inline-block; margin-top: .18em; }
.contact > p:not(.eyebrow) { font-size: clamp(1.05rem, 1.6vw, 1.35rem); }
.public-ai { background: var(--ink); color: var(--paper); }
.public-ai .eyebrow, .public-ai-head > p { color: color-mix(in srgb, var(--paper) 65%, transparent); }
.public-ai-head { display: grid; grid-template-columns: 1.1fr .9fr; gap: 8vw; align-items: end; }
.public-ai-head h2 { margin-bottom: 0; }
.public-ai-head h2 em { color: var(--accent); font-style: normal; }
.public-ai-head > p { max-width: 520px; line-height: 1.8; }
.public-ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 75px; background: color-mix(in srgb, var(--paper) 25%, transparent); }
.public-ai-grid article { min-height: 330px; padding: 35px; background: var(--ink); }
.public-ai-grid span { color: var(--accent); font-size: .7rem; }
.public-ai-grid h3 { margin: 70px 0 18px; font: 400 2rem "Gowun Batang", serif; }
.public-ai-grid p { color: color-mix(in srgb, var(--paper) 62%, transparent); line-height: 1.75; }
.source-link { display: inline-block; margin-top: 35px; color: var(--accent); font-size: .72rem; letter-spacing: .08em; }
.linkedin-writing { margin-top: 90px; }
.contribution { margin-top: 90px; padding: clamp(30px, 5vw, 60px); border: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 94%, var(--accent)); }
.contribution > h3 { max-width: 1000px; margin: 18px 0 22px; font: 400 clamp(2rem, 4vw, 3.7rem)/1.28 "Gowun Batang", serif; letter-spacing: -.04em; }
.contribution-summary { max-width: 900px; color: var(--muted); font-size: clamp(1rem, 1.35vw, 1.18rem); line-height: 1.9; }
.contribution-details { margin-top: 35px; border-top: 1px solid var(--line); }
.contribution-details summary { display: flex; justify-content: space-between; align-items: center; padding: 22px 0; color: var(--accent); font-size: .78rem; font-weight: 600; letter-spacing: .08em; cursor: pointer; list-style: none; }
.contribution-details summary::-webkit-details-marker { display: none; }
.contribution-details summary i { font: normal 1.4rem/1 "DM Sans", sans-serif; transition: transform .25s ease; }
.contribution-details[open] summary i { transform: rotate(45deg); }
.contribution-details summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; }
.contribution-content { max-width: 900px; padding: 10px 0 18px; }
.contribution-content p { margin: 0 0 22px; color: var(--muted); line-height: 1.95; }
.contribution-content h4 { margin: 50px 0 16px; font: 400 clamp(1.35rem, 2.2vw, 1.8rem)/1.45 "Gowun Batang", serif; }
.contribution-source { margin-top: 25px; }
.writing-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-top: 22px; background: var(--line); }
.writing-grid a { min-height: 310px; padding: 32px; background: var(--paper); }
.writing-grid span, .writing-grid b { color: var(--accent); font-size: .65rem; letter-spacing: .1em; }
.writing-grid h3 { margin: 48px 0 16px; font: 400 1.7rem "Gowun Batang", serif; }
.writing-grid p { color: var(--muted); line-height: 1.75; }

.media-intro { align-items: end; margin-bottom: 70px; }
.media-intro p { max-width: 520px; color: var(--muted); line-height: 1.8; }
.media-list { border-top: 1px solid var(--line); }
.media-item { display: grid; grid-template-columns: 150px 1.1fr 1fr auto; gap: 3vw; align-items: start; padding: 30px 0; border-bottom: 1px solid var(--line); }
.media-item span { color: var(--accent); font-size: .65rem; letter-spacing: .1em; }
.media-item h3 { margin: 0; font: 400 clamp(1.2rem, 2vw, 1.75rem) "Gowun Batang", serif; }
.media-item p { margin: 0; color: var(--muted); font-size: .88rem; line-height: 1.7; }
.media-item b { color: var(--accent); font-size: .65rem; letter-spacing: .08em; white-space: nowrap; }
.media-item:hover h3 { color: var(--accent); }
.video-library { margin-top: 100px; }
.video-heading { display: flex; justify-content: space-between; align-items: end; margin-bottom: 28px; }
.video-heading h3 { margin: 0; font: 400 clamp(1.7rem, 3vw, 2.8rem) "Gowun Batang", serif; }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); }
.video-grid a { min-height: 260px; padding: 28px; background: var(--paper); display: flex; flex-direction: column; }
.video-grid span, .video-grid b { color: var(--accent); font-size: .64rem; letter-spacing: .1em; }
.video-grid h4 { margin: 40px 0 12px; font: 400 1.35rem/1.4 "Gowun Batang", serif; }
.video-grid p { color: var(--muted); font-size: .8rem; line-height: 1.6; }
.video-grid b { margin-top: auto; }
.video-grid a:hover h4 { color: var(--accent); }

@media (max-width: 720px) {
  body { overflow-wrap: break-word; }
  .source-note { margin: 28px 0 0; }
  .site-header .logo { font-size: .9rem; }
  .hero { min-height: auto; padding-top: clamp(3.5rem, 12vw, 5rem); gap: clamp(3rem, 12vw, 5rem); }
  .hero-kicker { max-width: 18rem; line-height: 1.55; }
  .hero h1 { font-size: clamp(2.35rem, 10vw, 2.8rem); line-height: 1.12; letter-spacing: -.07em; word-break: keep-all; }
  .hero h1 em { display: inline; margin-top: 0; }
  .hero-bottom { display: grid; grid-template-columns: 1fr; gap: 1.4rem; align-items: start; }
  .hero-bottom p { max-width: none; font-size: 1rem; line-height: 1.8; word-break: keep-all; }
  .round-link { justify-self: end; }
  .section h2, .contact h2 { font-size: clamp(2.45rem, 11vw, 3.25rem); line-height: 1.15; word-break: keep-all; }
  .about-copy > p, .project-info p, .public-ai-grid p, .writing-grid p,
  .media-intro p, .media-item p, .video-grid p, .insight-list p,
  .contact > p { word-break: keep-all; }
  .facts { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .7rem; }
  .facts dd { font-size: clamp(1.1rem, 5.5vw, 1.55rem); overflow-wrap: anywhere; }
  .timeline div { grid-template-columns: 1fr; gap: 8px; }
  .timeline h3, .timeline p, .timeline span { grid-column: auto; }
  .project-info h3, .public-ai-grid h3, .writing-grid h3,
  .media-item h3, .video-grid h4, .insight-list h3 { line-height: 1.4; word-break: keep-all; }
  .public-ai-head, .public-ai-grid, .writing-grid { grid-template-columns: 1fr; }
  .contribution { margin-top: 60px; padding: 26px 20px; }
  .contribution > h3 { font-size: clamp(1.8rem, 8vw, 2.35rem); word-break: keep-all; }
  .contribution-summary, .contribution-content p { word-break: keep-all; }
  .public-ai-grid { margin-top: 45px; }
  .public-ai-grid article { min-height: auto; padding: 26px; }
  .public-ai-grid h3 { margin-top: 40px; }
  .writing-grid a { min-height: auto; padding: 26px; }
  .media-intro { margin-bottom: 45px; }
  .media-item { grid-template-columns: 1fr; gap: 10px; padding: 25px 0; }
  .media-item b { margin-top: 5px; }
  .video-heading { display: block; }
  .video-heading h3 { margin-top: 12px; }
  .video-grid { grid-template-columns: 1fr; }
  .video-grid a { min-height: 230px; padding: 26px; }
}