/* Proof index visual refresh: tighter hero, stronger catalog hierarchy, clearer evidence cards */
.proof-page {
  background:
    radial-gradient(circle at 86% 14%, rgba(217,70,239,.055), transparent 25%),
    radial-gradient(circle at 10% 58%, rgba(56,189,248,.04), transparent 28%),
    var(--home-bg);
}

.proof-page .nav,
.proof-page main > .page,
.proof-page main > .section,
.proof-page .compact-footer-grid,
.proof-page .site-footer > .credibility,
.proof-page .site-footer > .footer-meta {
  width: min(100% - 3rem, 1380px);
  max-width: 1380px;
  margin-inline: auto;
}

.proof-page .page-hero {
  position: relative;
  margin-top: 2rem;
  padding: clamp(3rem, 6vw, 5.75rem) clamp(2rem, 5vw, 5rem);
  border: 1px solid rgba(148,163,184,.11);
  border-radius: 1.35rem;
  background:
    linear-gradient(135deg, rgba(37,99,235,.06), transparent 46%),
    linear-gradient(180deg, rgba(11,24,43,.94), rgba(8,18,33,.78));
  box-shadow: 0 32px 90px rgba(0,0,0,.27);
  overflow: hidden;
}

.proof-page .page-hero::after {
  content: "";
  position: absolute;
  width: clamp(20rem, 38vw, 38rem);
  aspect-ratio: 1;
  right: -10%;
  top: -25%;
  border: 1px solid rgba(56,189,248,.07);
  border-radius: 50%;
  box-shadow: 0 0 0 6rem rgba(37,99,235,.018);
  pointer-events: none;
}

.proof-page .page-hero .section-head,
.proof-page .page-hero .actions {
  position: relative;
  z-index: 1;
  max-width: 74rem;
}

.proof-page .page-hero h1 {
  max-width: 12ch;
  font-size: clamp(3.7rem, 6.8vw, 7rem);
  line-height: .94;
  letter-spacing: -.055em;
  text-wrap: balance;
}

.proof-page .page-hero .lead {
  max-width: 60rem;
  font-size: clamp(1.08rem, 1.4vw, 1.3rem);
}

.proof-page .page-hero .actions {
  margin-top: 2.25rem;
  gap: .8rem;
}

.proof-page main > .section {
  position: relative;
  margin-top: 2rem;
  padding: clamp(4rem, 7vw, 7rem) clamp(2rem, 4vw, 4.5rem);
  border: 1px solid rgba(148,163,184,.09);
  border-radius: 1.35rem;
  background: linear-gradient(180deg, rgba(8,20,36,.88), rgba(7,17,31,.7));
  box-shadow: 0 24px 75px rgba(0,0,0,.2);
}

.proof-page main > .section > .section-head {
  display: grid;
  grid-template-columns: minmax(0,1.12fr) minmax(20rem,.88fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: end;
  margin-bottom: 2.5rem;
}

.proof-page main > .section > .section-head h2 {
  max-width: 13ch;
  font-size: clamp(3rem, 5.2vw, 5.8rem);
  line-height: .97;
  text-wrap: balance;
}

.proof-page main > .section > .section-head > p:last-child {
  max-width: 38rem;
  font-size: 1.08rem;
}

.proof-page .filter-toolbar {
  position: sticky;
  top: .75rem;
  z-index: 8;
  display: grid;
  grid-template-columns: minmax(18rem,1.6fr) repeat(3,minmax(10rem,.8fr)) auto;
  gap: .8rem;
  align-items: end;
  padding: 1rem;
  border: 1px solid rgba(217,70,239,.24);
  border-radius: 1rem;
  background: rgba(8,18,34,.94);
  box-shadow: 0 18px 50px rgba(0,0,0,.3);
  backdrop-filter: blur(16px);
}

.proof-page .filter-field label {
  display: block;
  margin-bottom: .42rem;
  color: #b9c8dc;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.proof-page .filter-field input,
.proof-page .filter-field select {
  min-height: 3.15rem;
  border-radius: .65rem;
}

.proof-page .filter-toolbar > .button {
  min-height: 3.15rem;
  padding-inline: 1.15rem;
}

.proof-page .filter-summary {
  margin: 1rem 0 1.25rem;
  color: #9fb1c8;
  font-weight: 700;
}

.proof-page .proof-matrix {
  display: grid;
  grid-template-columns: repeat(12,minmax(0,1fr));
  gap: 1.15rem;
  align-items: start;
}

.proof-page .proof-chip {
  grid-column: span 6;
  position: relative;
  padding: clamp(1.45rem, 2.2vw, 2rem);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 18px 55px rgba(0,0,0,.2);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.proof-page .proof-chip:nth-child(3n+1) {
  grid-column: span 7;
}

.proof-page .proof-chip:nth-child(3n+2) {
  grid-column: span 5;
}

.proof-page .proof-chip:hover,
.proof-page .proof-chip:focus-within {
  transform: translateY(-4px);
  border-color: rgba(56,189,248,.42);
  box-shadow: 0 26px 70px rgba(0,0,0,.3);
}

.proof-page .proof-chip::after {
  content: "";
  position: absolute;
  width: 12rem;
  aspect-ratio: 1;
  right: -5rem;
  bottom: -7rem;
  border: 1px solid rgba(56,189,248,.07);
  border-radius: 50%;
  pointer-events: none;
}

.proof-page .chip-kind {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding: .28rem .6rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: .68rem;
  font-weight: 900;
  letter-spacing: .075em;
  text-transform: uppercase;
}

.proof-page .proof-chip h3 {
  max-width: 24ch;
  margin-top: 1rem;
  font-size: clamp(1.55rem, 2.2vw, 2.2rem);
  line-height: 1.05;
  text-wrap: balance;
}

.proof-page .claim-details {
  display: grid;
  gap: .7rem;
  margin-top: 1.25rem;
}

.proof-page .claim-details > div {
  padding: .9rem 1rem;
  border: 1px solid rgba(148,163,184,.09);
  border-radius: .7rem;
  background: rgba(8,19,34,.42);
}

.proof-page .claim-details dt {
  margin-bottom: .35rem;
  color: #4fd1ff;
  font-size: .7rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.proof-page .claim-details > div:last-child dt {
  color: #f0a6e7;
}

.proof-page .proof-links {
  margin-top: 1.25rem;
  gap: .55rem;
}

.proof-page .proof-links a {
  min-height: 2.45rem;
  display: inline-flex;
  align-items: center;
  padding: .55rem .78rem;
  border-radius: .55rem;
}

.proof-page .evidence-boundary-card {
  grid-column: span 12;
  background:
    linear-gradient(135deg, rgba(217,70,239,.08), transparent 48%),
    rgba(14,24,42,.9);
}

.proof-page .site-footer {
  width: min(100% - 3rem, 1380px);
  max-width: 1380px;
  margin: 2rem auto 0;
  padding: 2rem;
  border: 1px solid rgba(148,163,184,.09);
  border-radius: 1.2rem 1.2rem 0 0;
  background: linear-gradient(180deg, rgba(9,21,38,.9), rgba(10,15,30,.96));
}

@media (max-width: 1100px) {
  .proof-page main > .section > .section-head,
  .proof-page .filter-toolbar {
    grid-template-columns: 1fr 1fr;
  }
  .proof-page .filter-field:first-child { grid-column: 1 / -1; }
  .proof-page .proof-chip,
  .proof-page .proof-chip:nth-child(3n+1),
  .proof-page .proof-chip:nth-child(3n+2) { grid-column: span 6; }
}

@media (max-width: 760px) {
  .proof-page .nav,
  .proof-page main > .page,
  .proof-page main > .section,
  .proof-page .site-footer {
    width: min(100% - 1.5rem, 1380px);
  }
  .proof-page .page-hero,
  .proof-page main > .section { padding: 2.5rem 1.25rem; }
  .proof-page .page-hero h1 { font-size: clamp(3rem, 14vw, 4.5rem); }
  .proof-page main > .section > .section-head,
  .proof-page .filter-toolbar { grid-template-columns: 1fr; }
  .proof-page .filter-field:first-child { grid-column: auto; }
  .proof-page .filter-toolbar { position: relative; top: auto; }
  .proof-page .proof-chip,
  .proof-page .proof-chip:nth-child(3n+1),
  .proof-page .proof-chip:nth-child(3n+2),
  .proof-page .evidence-boundary-card { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  .proof-page .proof-chip { transition: none; }
}