/* Browser observation lab: extends the existing project identity. */
.lab-section { padding-block: 44px; scroll-margin-top: 24px; }
.lab-section h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); line-height: 1.4; margin: 0 0 18px; letter-spacing: -.025em; }
.lab-section-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-bottom: 22px; }
.lab-section-heading h2 { margin-bottom: 0; }
.lab-section-heading .kicker { margin-bottom: 8px; }
.lab-badge { display: inline-block; color: #226450; background: #e5f5ef; padding: 7px 12px; border-radius: 8px; font-size: .76rem; }
.lab-lead { max-width: 840px; color: var(--muted); margin: 0 0 26px; }
.lab-credit-line { max-width: 900px; color: var(--muted); font-size: .85rem; line-height: 1.9; margin: -10px 0 28px; }
.lab-credit-line a { display: inline-block; }
.lab-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.lab-card { border: 1px solid var(--soft-line); border-radius: 20px; background: white; overflow: hidden; box-shadow: var(--shadow-soft); display: flex; flex-direction: column; }
.lab-art-link { display: block; background: #102138; }
.lab-art-link img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; transition: opacity .2s; }
.lab-art-link:hover img { opacity: .86; }
.lab-card-content { padding: 24px; display: flex; flex-direction: column; align-items: flex-start; flex: 1; }
.lab-card-kicker { color: #526c84; font-size: .72rem; letter-spacing: .07em; font-weight: 750; margin: 0 0 9px; }
.lab-card h3 { font-size: 1.35rem; line-height: 1.4; margin: 0 0 12px; overflow-wrap: anywhere; }
.lab-card h3 a { color: var(--ink); text-decoration: none; }
.lab-card p:not(.lab-card-kicker) { color: var(--muted); font-size: .89rem; line-height: 1.85; margin: 0 0 16px; }
.lab-card .lab-question { border-left: 2px solid #c2dfed; padding-left: 12px; }
.lab-card .button { margin-top: auto; }
.lab-section-footer { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 28px; margin-top: 23px; font-size: .87rem; }
.lab-jump { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.lab-jump a { display: inline-block; border: 1px solid var(--line); border-radius: 9px; background: white; padding: 9px 16px; text-decoration: none; font-size: .88rem; }
.lab-hero { padding-bottom: 30px; }
.lab-hero h1 { font-size: clamp(2rem, 5.4vw, 4.3rem); line-height: 1.3; letter-spacing: -.04em; margin: 20px 0 24px; }
.lab-phrase { display: inline-block; }
.lab-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 18px; }
.lab-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; counter-reset: steps; list-style: none; padding: 0; margin: 30px 0; }
.lab-steps li { counter-increment: steps; padding-top: 16px; border-top: 2px solid #afcfe3; }
.lab-steps li::before { content: '0' counter(steps); display: block; color: #497b9a; font-size: .78rem; letter-spacing: .08em; margin-bottom: 8px; }
.lab-steps p { color: var(--muted); font-size: .92rem; }
.lab-notes { background: #edf5fa; border-radius: 14px; padding: 18px 24px; color: #465f75; font-size: .86rem; }
.lab-notes p { margin: 6px 0; }
.lab-about { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; border-block: 1px solid var(--line); padding-block: 40px; }
.lab-about p { margin-top: 0; }
.lab-people { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-block: 24px; }
.lab-people-four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.lab-people a { text-decoration: none; display: flex; flex-direction: column; background: white; border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
.lab-people strong { color: var(--ink); font-size: 1.2rem; }
.lab-people span { color: var(--muted); font-size: .85rem; margin-top: 6px; }
.student-profiles article { background: white; border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.student-profiles h3 { margin: 0 0 8px; font-size: 1.3rem; }
.student-profiles p { margin: 6px 0; }
.student-profiles .small-note { border-top: 1px solid var(--soft-line); padding-top: 14px; margin-top: 18px; }
.lab-home-callout { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 30px; margin-block: 34px; border: 1px solid #b9d5e8; background: #edf6fc; border-radius: 20px; }
.lab-home-callout h2 { margin: 5px 0 10px; font-size: 1.7rem; line-height: 1.4; }
.lab-home-callout p { margin: 0; max-width: 720px; }
.lab-home-callout .button { flex-shrink: 0; }
#visiting-students, [id^="person-"] { scroll-margin-top: 24px; }
@media (max-width: 900px) {
  .lab-people-four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lab-grid { gap: 14px; }
  .lab-card-content { padding: 18px; }
  .lab-card h3 { font-size: 1.15rem; }
}
@media (max-width: 700px) {
  .lab-grid, .lab-steps, .lab-people, .lab-about { grid-template-columns: 1fr; }
  .lab-section { padding-block: 28px; }
  .lab-grid { gap: 24px; }
  .lab-card-content { padding: 24px; }
  .lab-card h3 { font-size: 1.4rem; }
  .lab-home-callout { align-items: flex-start; flex-direction: column; padding: 24px; }
  .lab-about { gap: 16px; }
  .lab-steps { gap: 16px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .lab-art-link img { transition: none; } }