/*
 * /about and /brandkit.
 *
 * A narrative column at a readable measure (Wise), three equal explanatory
 * panels (ChatGPT), and a horizontal dated timeline (Neon). Brand colours come
 * from brandkit/airr-brand-sheet.html rather than being approximated.
 */

.airr-about,.airr-bk{--bk-ink:#111C2E;--bk-blue:#3D5AFE;--bk-green:#00915A;--bk-slate:#5A6B85}

/* ------------------------------------------------------------- about --- */
.airr-eyebrow{font-size:.72rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;
  color:var(--bk-blue);margin:0 0 14px}
.airr-about-hero{max-width:820px;margin:14px 0 42px}
.airr-about-hero h1{font-size:clamp(1.9rem,4.2vw,3rem);line-height:1.1;letter-spacing:-.03em;
  font-weight:800;margin:0 0 20px;color:var(--bk-ink);text-wrap:balance}
.airr-about-lede{font-size:clamp(1.02rem,1.6vw,1.2rem);line-height:1.6;color:var(--a-ink2);
  margin:0;max-width:60ch}

.airr-about-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));
  gap:1px;background:var(--a-rule);border:1px solid var(--a-rule);border-radius:14px;
  overflow:hidden;margin:0 0 56px}
.airr-about-stats div{background:var(--a-card);padding:22px 20px;display:flex;
  flex-direction:column;gap:5px}
.airr-about-stats b{font-size:1.9rem;font-weight:800;letter-spacing:-.02em;color:var(--bk-ink);
  font-variant-numeric:tabular-nums;line-height:1}
.airr-about-stats span{font-size:.83rem;color:var(--a-muted);line-height:1.4}

.airr-about h2{font-size:clamp(1.3rem,2.4vw,1.75rem);font-weight:780;letter-spacing:-.02em;
  margin:0 0 18px;color:var(--bk-ink)}
.airr-about-mission,.airr-about-panels,.airr-about-timeline,.airr-about-who{margin:0 0 56px}
.airr-about-big{font-size:clamp(1.2rem,2.2vw,1.55rem);line-height:1.45;font-weight:600;
  color:var(--bk-ink);max-width:34ch;margin:0 0 26px;text-wrap:balance}
.airr-about-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:28px}
.airr-about-cols p{margin:0 0 14px;font-size:.97rem;line-height:1.7;color:var(--a-ink2);max-width:60ch}
.airr-about-cols a{color:var(--bk-blue);font-weight:600}

/* three panels */
.airr-panelgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:16px}
.airr-panel{background:var(--a-card2);border-radius:16px;padding:26px 24px;
  display:flex;flex-direction:column}
.airr-panel h3{font-size:1.12rem;font-weight:750;margin:0 0 12px;color:var(--bk-ink);
  letter-spacing:-.01em}
.airr-panel p{margin:0 0 12px;font-size:.93rem;line-height:1.65;color:var(--a-ink2)}
.airr-panel-foot{margin-top:auto !important;padding-top:6px}
.airr-panel-foot a{color:var(--bk-blue);font-weight:650;font-size:.88rem;text-decoration:none}
.airr-panel-foot a:hover{text-decoration:underline}

/* timeline: a horizontal band on desktop, a plain list on narrow screens */
.airr-tl{list-style:none;margin:0;padding:0;display:grid;gap:0;
  grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}
.airr-tl-item{display:flex;flex-direction:column;gap:0;padding:0 16px 0 0}
.airr-tl-date{font-size:.74rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:var(--a-muted);font-variant-numeric:tabular-nums;margin-bottom:9px}
/* The bar lightens along the sequence and the final segment carries the accent,
   so "now" is legible without a legend. */
.airr-tl-bar{height:9px;border-radius:2px;margin:0 0 14px;
  background:color-mix(in srgb,var(--bk-ink) calc(78% - (var(--i) * 14%)),#ffffff);}
.airr-tl-item:last-child .airr-tl-bar{background:var(--bk-green)}
.airr-tl-title{font-size:1rem;font-weight:750;color:var(--bk-ink);margin-bottom:7px;
  letter-spacing:-.01em}
.airr-tl-body{font-size:.88rem;line-height:1.6;color:var(--a-ink2)}
@media (max-width:720px){
  .airr-tl{grid-template-columns:1fr;gap:22px}
  .airr-tl-item{padding-right:0}
  .airr-tl-bar{height:5px;max-width:120px}
}

/* ---------------------------------------------------------- brandkit --- */
.airr-bk-hero{max-width:760px;margin:14px 0 44px}
.airr-bk-hero h1{font-size:clamp(1.9rem,4vw,2.8rem);line-height:1.1;letter-spacing:-.03em;
  font-weight:800;margin:0 0 18px;color:var(--bk-ink)}
.airr-bk-lede{font-size:1.05rem;line-height:1.65;color:var(--a-ink2);margin:0 0 24px;max-width:58ch}
.airr-bk-actions{display:flex;flex-wrap:wrap;gap:10px;margin:0}
.airr-bk-btn{display:inline-flex;align-items:center;padding:11px 20px;border-radius:10px;
  background:var(--bk-ink);color:#fff;font-weight:650;font-size:.92rem;text-decoration:none}
.airr-bk-btn:hover{background:var(--bk-blue);color:#fff}
.airr-bk-btn--ghost{background:transparent;color:var(--bk-ink);border:1px solid var(--a-rule2)}
.airr-bk-btn--ghost:hover{background:transparent;color:var(--bk-blue);border-color:var(--bk-blue)}

.airr-bk-sec{margin:0 0 56px}
.airr-bk-sec h2{font-size:clamp(1.25rem,2.2vw,1.6rem);font-weight:780;letter-spacing:-.02em;
  margin:0 0 16px;color:var(--bk-ink)}
.airr-bk-note{font-size:.93rem;line-height:1.65;color:var(--a-ink2);max-width:66ch;margin:0 0 22px}
.airr-bk-note code{background:var(--a-card2);padding:1px 6px;border-radius:5px;font-size:.86em}
.airr-bk-warn{border-left:3px solid var(--bk-green);padding-left:14px}

.airr-bk-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
.airr-bk-card{margin:0;border:1px solid var(--a-rule);border-radius:14px;overflow:hidden;
  background:var(--a-card)}
.airr-bk-stage{display:flex;align-items:center;justify-content:center;padding:30px 24px;
  min-height:118px;background:#fff}
.airr-bk-card--light .airr-bk-stage{background:#fff}
.airr-bk-card--dark .airr-bk-stage{background:var(--bk-ink)}
.airr-bk-art{max-width:100%;height:auto;display:block}
.airr-bk-art svg{max-width:100%;height:auto;display:block}
.airr-bk-card figcaption{display:flex;flex-direction:column;gap:5px;padding:15px 17px;
  border-top:1px solid var(--a-rule)}
.airr-bk-card figcaption b{font-size:.92rem;font-weight:700;color:var(--bk-ink)}
.airr-bk-card figcaption span{font-size:.82rem;line-height:1.5;color:var(--a-muted)}
.airr-bk-card figcaption a{align-self:flex-start;margin-top:4px;font-size:.7rem;font-weight:800;
  letter-spacing:.07em;color:var(--bk-blue);text-decoration:none;
  border:1px solid var(--a-rule2);border-radius:6px;padding:3px 9px}
.airr-bk-card figcaption a:hover{border-color:var(--bk-blue)}

.airr-bk-swatches{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px}
.airr-bk-swatch{margin:0}
.airr-bk-chip{display:block;height:96px;border-radius:12px;border:1px solid var(--a-rule)}
.airr-bk-swatch figcaption{display:flex;flex-direction:column;gap:3px;padding:11px 2px 0}
.airr-bk-swatch b{font-size:.92rem;font-weight:700;color:var(--bk-ink)}
.airr-bk-swatch code{font-size:.8rem;color:var(--a-muted);font-variant-numeric:tabular-nums}
.airr-bk-swatch span{font-size:.82rem;line-height:1.5;color:var(--a-muted)}

.airr-bk-type{border:1px solid var(--a-rule);border-radius:14px;padding:26px 24px;background:var(--a-card)}
.airr-bk-spec{display:flex;flex-wrap:wrap;gap:10px;align-items:baseline;margin:0 0 8px}
.airr-bk-spec b{font-size:.95rem;color:var(--bk-ink)}
.airr-bk-spec span{font-size:.8rem;color:var(--a-muted)}
.airr-bk-sample{font-size:clamp(1.5rem,3.4vw,2.3rem);font-weight:800;letter-spacing:-.03em;
  color:var(--bk-ink);margin:0 0 28px;line-height:1.15}
.airr-bk-sample--body{font-size:1rem;font-weight:400;letter-spacing:0;color:var(--a-ink2);margin-bottom:0}

.airr-bk-dont{list-style:none;margin:0;padding:0;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:12px}
.airr-bk-dont li{background:var(--a-card2);border-radius:11px;padding:15px 17px;
  font-size:.9rem;line-height:1.6;color:var(--a-ink2)}
.airr-bk-dont b{color:var(--bk-ink)}

/* ------------------------------------------------- category chart --- */
.airr-about-sub{font-size:.97rem;line-height:1.65;color:var(--a-ink2);max-width:62ch;margin:0 0 22px}
.airr-about-chart{margin:0 0 56px}
.airr-catchart{display:flex;flex-direction:column;gap:2px;border:1px solid var(--a-rule);
  border-radius:14px;padding:14px 16px;background:var(--a-card)}
.airr-catbar{display:grid;grid-template-columns:minmax(120px,180px) 1fr auto;align-items:center;
  gap:14px;padding:7px 8px;border-radius:8px;text-decoration:none;transition:background .12s}
.airr-catbar:hover{background:var(--a-card2)}
.airr-catbar-name{font-size:.87rem;font-weight:600;color:var(--bk-ink);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.airr-catbar-track{height:16px;border-radius:4px;background:var(--a-card2);overflow:hidden}
.airr-catbar-fill{display:block;height:100%;width:var(--pct);border-radius:4px;
  background:linear-gradient(90deg,var(--bk-blue),#6f84ff);
  transition:width .5s cubic-bezier(.22,.9,.3,1)}
.airr-catbar:hover .airr-catbar-fill{background:linear-gradient(90deg,var(--bk-green),#33e0a4)}
.airr-catbar-n{font-size:.85rem;font-weight:700;color:var(--a-ink2);
  font-variant-numeric:tabular-nums;min-width:44px;text-align:right}
@media (prefers-reduced-motion:reduce){.airr-catbar-fill{transition:none}}
@media (max-width:600px){
  .airr-catbar{grid-template-columns:1fr auto;gap:8px}
  .airr-catbar-track{grid-column:1/-1;order:3}
}

/* ------------------------------------------------- pillar figures --- */
.airr-panel-fig{display:block;margin:0 0 16px;border:1px solid var(--a-rule);
  border-radius:11px;overflow:hidden;background:#fff}
.airr-panel-fig img{display:block;width:100%;height:auto}
.airr-panel-cap{font-size:.74rem;color:var(--a-muted);margin:-8px 0 12px}