/* The application strip bridges the procedural field and project portfolio. */
.applications-section{padding-top:0;padding-bottom:0}
.application-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.application-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.application-panel{position:relative;min-width:0;padding:30px 24px 34px;border-right:1px solid var(--line);background:linear-gradient(180deg,rgba(166,107,225,.045),transparent 80%);transition:background-color .25s}
.application-panel:first-child{padding-left:0}
.application-panel:last-child{border-right:0;padding-right:0}
.application-panel::before{content:'';position:absolute;top:0;left:24px;width:24px;height:2px;background:var(--purple);transition:width .25s}
.application-panel:first-child::before{left:0}
.application-panel:hover{background-color:rgba(156,94,209,.045)}
.application-panel:hover::before{width:48px}
.application-number,.proof-number{display:block;font-size:12px;line-height:1.5;color:var(--purple);margin-bottom:30px}
.application-panel h2{font-size:14px;line-height:1.55;letter-spacing:.06em;text-transform:uppercase;margin:0 0 15px;color:var(--muted);min-height:44px;font-weight:400}
.application-panel p{font-size:clamp(19px,1.85vw,27px);line-height:1.45;letter-spacing:-.035em;color:var(--text);margin:0;font-weight:500;max-width:24ch}
.engineering-intro p{font-size:16px;line-height:1.8}
.engineering-intro p.large-copy{font-size:clamp(22px,2.5vw,32px);line-height:1.5;letter-spacing:-.035em}
.engineering-proof{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:52px;border-top:1px solid var(--line)}
.engineering-proof article{padding:28px 26px 0 0;min-width:0;display:flex;flex-direction:column}
.engineering-proof article+article{border-left:1px solid var(--line);padding-left:26px}
.engineering-proof .proof-number{margin-bottom:20px}
.engineering-proof h3{font-size:20px;line-height:1.5;margin:0 0 14px;letter-spacing:-.035em}
.engineering-proof p{font-size:16px;line-height:1.8;margin:0 0 24px}
.proof-links{display:flex;flex-direction:column;align-items:flex-start;gap:12px;margin-top:auto}
.proof-links a{font-size:14px;line-height:1.6;text-decoration:underline;text-decoration-color:var(--line);text-underline-offset:5px;transition:color .2s}
.proof-links a span,.proof-links a:hover{color:var(--purple)}
@media(max-width:1000px){
  .application-grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .application-grid-4 .application-panel:nth-child(2){border-right:0;padding-right:0}
  .application-grid-4 .application-panel:nth-child(3){border-top:1px solid var(--line);padding-left:0}
  .application-grid-4 .application-panel:nth-child(3)::before{left:0}
  .application-grid-4 .application-panel:nth-child(4){border-top:1px solid var(--line)}
  .application-panel p{font-size:22px}
}
@media(max-width:700px){
  .application-grid,.application-grid-3{grid-template-columns:1fr}
  .application-grid .application-panel{padding:26px 0;border-right:0;display:grid;grid-template-columns:28px minmax(0,1fr);gap:0 16px}
  .application-panel+.application-panel{border-top:1px solid var(--line)}
  .application-grid .application-panel::before{left:0;width:20px}
  .application-number{grid-column:1;grid-row:1/3;margin:1px 0 0}
  .application-panel h2{grid-column:2;min-height:0;margin-bottom:10px}
  .application-panel p{grid-column:2;font-size:22px;max-width:28ch}
  .engineering-proof{grid-template-columns:1fr;margin-top:32px}
  .engineering-proof article,.engineering-proof article+article{border-left:0;padding:25px 0}
  .engineering-proof article+article{border-top:1px solid var(--line)}
  .engineering-proof article:last-child{padding-bottom:0}
  .engineering-proof .proof-number{margin-bottom:14px}
}
@media(prefers-reduced-motion:reduce){.application-panel,.application-panel::before,.proof-links a{transition:none}}