.proof-grid { display: grid; gap: 1rem; }
.proof-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.proof-item { background: var(--color-bg); border: 1px solid var(--color-border); min-width: 0; padding: clamp(1.35rem, 3vw, 2rem); }
.proof-provenance { color: var(--color-signal); font-size: .7rem; font-weight: 600; letter-spacing: .08em; margin-bottom: .75rem; text-transform: uppercase; }
.proof-item :is(h3, h4) { font-family: var(--font-serif); font-size: 1.3rem; font-weight: 500; line-height: 1.3; }
.proof-item > p:not(.proof-provenance) { color: var(--color-text-muted); line-height: 1.65; margin-top: .75rem; }
.proof-links { align-items: flex-start; display: flex; flex-direction: column; gap: .65rem; margin-top: 1.1rem; }
.proof-links a { color: var(--color-text); font-weight: 600; text-decoration: underline; text-decoration-color: var(--color-border-strong); text-underline-offset: .2em; }
.proof-links a:hover, .proof-links a:focus-visible { text-decoration-color: var(--color-text); }
.proof-visual-pair { display: grid; gap: 1rem; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 3rem; }
.proof-visual { background: var(--color-bg); border: 1px solid var(--color-border); min-width: 0; }
.proof-visual img { aspect-ratio: 8 / 5; display: block; height: auto; object-fit: cover; object-position: top; width: 100%; }
.proof-visual figcaption { display: grid; gap: .45rem; padding: 1.25rem; }
.proof-visual figcaption strong { font-family: var(--font-serif); font-size: 1.2rem; font-weight: 500; }
.proof-visual figcaption span { color: var(--color-text-muted); font-size: .9rem; line-height: 1.6; }

@media (max-width: 800px) {
  .proof-grid--three { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .proof-visual-pair { grid-template-columns: 1fr; margin-top: 2rem; }
}