@media (min-width: 1000px) {
  .frontier .section-head { grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 56px; align-items: start; }
  .frontier .section-head > p:last-child { font-size: var(--step-0); padding-top: 6px; }
}
.proof { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 14px; }
.glass.proof__card { grid-row: span 4; grid-template-rows: subgrid; min-height: 0; row-gap: 12px; padding: 22px 22px 18px; background: #fff; }
.proof__card:hover { transform: none; box-shadow: 0 24px 40px -28px #10161a40; }
.proof__lead { color: var(--ink-2); font-size: 1rem; }
@media (min-width: 600px) and (max-width: 999px) {
  .proof { grid-template-columns: 1fr; }
  .glass.proof__card { grid-row: auto; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); grid-template-rows: auto auto 1fr; column-gap: 24px; }
  .proof__card .proof__stage { grid-row: 1 / span 3; margin: 0; }
}
.proof__card .glass p { font-size: inherit; }

.proof__stage {
  display: grid; align-content: center; gap: 8px; margin: 0 0 6px; padding: 16px;
  border-radius: 14px; background: var(--white); border: 1px solid var(--line);
}
.proof__stage p { margin: 0; max-width: none; }
.proof__stage .mono { font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); }
.vendors { display: flex; flex-wrap: wrap; gap: 6px; }
.vendor {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 9px; border-radius: 8px;
  background: #fff; border: 1px solid var(--line); font: 500 0.82rem/1.2 var(--font-body); color: var(--ink); white-space: nowrap;
}
.vendor img { width: 14px; height: 14px; flex: none; }

.proof__tiers { grid-template-rows: auto auto auto; align-content: stretch; gap: 6px; }
.proof__tier { display: grid; align-content: center; gap: 6px; padding: 10px 12px; border-radius: 10px; background: #fff; border: 1px solid var(--line); }

.proof__stats { grid-template-rows: 1fr 1fr; align-content: stretch; gap: 6px; }
.proof__stat {
  display: flex; flex-wrap: wrap; align-items: baseline; align-content: center; gap: 10px 14px;
  padding: 12px 14px; border-radius: 10px; background: #fff; border: 1px solid var(--line);
}
.proof__num { font: 600 clamp(2.8rem, 2.2rem + 1.6vw, 3.4rem)/0.85 var(--font-display); letter-spacing: -0.06em; color: var(--teal); }
.proof__stat .mono { white-space: nowrap; }
.proof__tally { flex-basis: 100%; }
.proof__tally::before { content: ""; display: block; background-repeat: repeat; }
.proof__tally--tests::before { width: 160px; height: 32px; background-image: radial-gradient(circle at 4px 4px, color-mix(in srgb, var(--teal) 70%, #fff) 2.6px, transparent 3.1px); background-size: 8px 8px; }
.proof__tally--models::before { width: 165px; height: 11px; background-image: radial-gradient(circle at 5.5px 5.5px, var(--teal) 4px, transparent 4.5px); background-size: 11px 11px; }

.proof__flow { gap: 0; }
.proof__node { position: relative; display: flex; flex-wrap: wrap; align-items: center; gap: 4px 6px; padding: 5px 0 5px 20px; }
.proof__node .mono { width: 100%; }
.proof__does { width: 100%; margin: -2px 0 2px; color: var(--ink-2); font-size: 0.82rem; }
.proof__node::before { content: ""; position: absolute; left: 3px; top: 11px; width: 7px; height: 7px; border-radius: 50%; background: var(--teal); }
.proof__node:not(:last-child)::after { content: ""; position: absolute; left: 6px; top: 20px; bottom: -9px; width: 1px; background: color-mix(in srgb, var(--teal) 45%, #fff); }

.proof__more { align-self: start; border-top: 1px solid var(--line); padding-top: 10px; }
.proof__more summary {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer; list-style: none;
  font: 500 0.9rem/1 var(--font-body); color: #055768; min-height: 44px; margin-block: -6px;
}
.proof__more summary::-webkit-details-marker { display: none; }
.proof__more summary::before {
  content: "i"; display: inline-grid; place-items: center; width: 18px; height: 18px; border-radius: 50%;
  border: 1px solid currentColor; font: 600 0.7rem/1 var(--font-mono);
}
.proof__more summary:hover { text-decoration: underline; }
.proof__more[open] summary::before { content: "–"; }
.proof__full { margin-top: 8px; color: var(--ink-2); font-size: 0.95rem; }