/* ─────────────────────────────────────────────────────────────
   PTL · page-patents
   Patent portfolio page · canon Apple-dark + trifecta naranja.
   Namespace: .pat-*  (todo cero colisión con legacy).
   Depende de: ptl-tokens + ptl-core + ptl-nav + ptl-footer.
   Build: 2026-04-16-page-patents-v1
   ───────────────────────────────────────────────────────────── */

/* ═══════════════════════════════════════════════════════════════
   1 · A11Y UTILITIES (skip-link, sr-only)
   ═══════════════════════════════════════════════════════════════ */
.ptl-skip {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: var(--ptl-z-toast);
  padding: 10px 16px;
  background: var(--ptl-text);
  color: var(--ptl-surface-alt);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--ptl-r-sm);
  text-decoration: none;
  transition: top var(--ptl-t-fast) var(--ptl-ease-out);
}
.ptl-skip:focus {
  top: 12px;
  outline: 2px solid var(--ptl-orange);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ═══════════════════════════════════════════════════════════════
   2 · PAGE SCOPE (body background + typography reset dentro de main)
   ═══════════════════════════════════════════════════════════════ */
body {
  background: var(--ptl-bg);
  color: var(--ptl-text);
  font-family: var(--ptl-font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.pat-main {
  display: block;
}

.pat-inner {
  max-width: var(--ptl-max);
  margin: 0 auto;
  padding: 0 var(--ptl-pad-x);
}
.pat-inner--center {
  text-align: center;
}

/* ═══════════════════════════════════════════════════════════════
   3 · TYPOGRAPHY TOKENS (page-scope)
   ═══════════════════════════════════════════════════════════════ */
.pat-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ptl-orange);
  margin-bottom: 1rem;
}

.pat-h1 {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: var(--ptl-text);
  margin: 0 0 1.25rem;
  max-width: 20ch;
}
.pat-h1 strong {
  font-weight: 900;
  color: var(--ptl-text);
}

.pat-h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--ptl-text);
  margin: 0 0 1rem;
  max-width: 22ch;
}

.pat-sub {
  font-size: clamp(1.0625rem, 1.4vw, 1.1875rem);
  font-weight: 400;
  line-height: 1.6;
  color: var(--ptl-text-2);
  margin: 0 0 2rem;
  max-width: 56ch;
}

.pat-inner--center .pat-h1,
.pat-inner--center .pat-h2 {
  margin-left: auto;
  margin-right: auto;
}
.pat-inner--center .pat-sub {
  margin-left: auto;
  margin-right: auto;
}

/* ═══════════════════════════════════════════════════════════════
   4 · HERO (canon hero--interior: full-bleed surface band + inner rail)
   ═══════════════════════════════════════════════════════════════ */
.pat-hero {
  position: relative;
  width: 100%;
  padding: calc(var(--ptl-nav-h) + 5rem) 0 4rem;
  background: var(--ptl-surface);
  border-bottom: 1px solid var(--ptl-border-soft);
  overflow: hidden;
}

.pat-hero-inner {
  max-width: var(--ptl-max);
  margin: 0 auto;
  padding: 0 var(--ptl-pad-x);
}

/* ═══════════════════════════════════════════════════════════════
   5 · BIG-STAT BLOCK (counter 91+)
   ═══════════════════════════════════════════════════════════════ */
.pat-bigstat {
  padding: 4rem var(--ptl-pad-x) 6rem;
  text-align: center;
  max-width: var(--ptl-max);
  margin: 0 auto;
}

.pat-bignum {
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--ptl-text);
  font-variant-numeric: tabular-nums;
  margin: 0 0 1rem;
}

.pat-bignum-label {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ptl-muted);
  max-width: 48ch;
  margin: 0 auto;
  line-height: 1.5;
}

/* ═══════════════════════════════════════════════════════════════
   6 · SECTIONS (base padding + alt band)
   ═══════════════════════════════════════════════════════════════ */
.pat-section {
  padding: 6rem 0;
  content-visibility: auto;
  contain-intrinsic-size: 1px 900px;
}

.pat-section--alt {
  background: var(--ptl-surface);
}

.pat-section + .pat-section {
  border-top: 1px solid var(--ptl-border-soft);
}
.pat-section--alt + .pat-section,
.pat-section + .pat-section--alt {
  border-top: none;
}

.pat-section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3.5rem;
}

/* ═══════════════════════════════════════════════════════════════
   7 · CATEGORY GRID (6 cards · stat number + title + body)
   ═══════════════════════════════════════════════════════════════ */
.pat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.pat-card {
  background: var(--ptl-surface-alt);
  border: 1px solid var(--ptl-border);
  border-radius: var(--ptl-r);
  padding: 2rem;
  box-shadow: var(--ptl-shadow);
  transition: transform var(--ptl-t-base) var(--ptl-ease-out),
              box-shadow var(--ptl-t-base) var(--ptl-ease-out),
              border-color var(--ptl-t-base) var(--ptl-ease-out);
  will-change: transform;
}
.pat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ptl-shadow-hover);
  border-color: var(--ptl-border-strong);
}

.pat-card-num {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--ptl-orange);
  margin: 0 0 1rem;
  font-variant-numeric: tabular-nums;
}

.pat-card-h3 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ptl-text);
  margin: 0 0 0.75rem;
}

.pat-card-body {
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.55;
  color: var(--ptl-text-2);
  margin: 0;
}

/* ═══════════════════════════════════════════════════════════════
   8 · EXTRAORDINARY CARDS (6 patents · sin número, foco en texto)
   ═══════════════════════════════════════════════════════════════ */
.pat-ex-card {
  background: var(--ptl-surface-alt);
  border: 1px solid var(--ptl-border);
  border-radius: var(--ptl-r);
  padding: 2rem;
  box-shadow: var(--ptl-shadow);
  transition: transform var(--ptl-t-base) var(--ptl-ease-out),
              box-shadow var(--ptl-t-base) var(--ptl-ease-out),
              border-color var(--ptl-t-base) var(--ptl-ease-out);
  position: relative;
}
.pat-ex-card::before {
  content: "";
  position: absolute;
  top: 2rem;
  left: 2rem;
  width: 28px;
  height: 2px;
  background: var(--ptl-orange);
  border-radius: 2px;
}
.pat-ex-card .pat-card-h3 {
  margin-top: 1.75rem;
}
.pat-ex-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ptl-shadow-hover);
  border-color: var(--ptl-border-strong);
}

/* ═══════════════════════════════════════════════════════════════
   9 · IMAGE GRID (2 cards · 2880×855 + 1043×726 protected)
   ═══════════════════════════════════════════════════════════════ */
.pat-img-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.pat-img-card {
  margin: 0;
  background: var(--ptl-surface-alt);
  border: 1px solid var(--ptl-border);
  border-radius: var(--ptl-rl);
  overflow: hidden;
  box-shadow: var(--ptl-shadow);
  transition: transform var(--ptl-t-base) var(--ptl-ease-out),
              box-shadow var(--ptl-t-base) var(--ptl-ease-out);
  display: flex;
  flex-direction: column;
}
.pat-img-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ptl-shadow-hover);
}
.pat-img-card img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center;
  background: var(--ptl-surface);
}

.pat-img-card figcaption {
  padding: 1.5rem 2rem 1.75rem;
  border-top: 1px solid var(--ptl-border);
  background: var(--ptl-surface-alt);
}
.pat-img-title {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--ptl-text);
  margin-bottom: 0.25rem;
}
.pat-img-desc {
  display: block;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--ptl-muted);
  line-height: 1.45;
}

/* ═══════════════════════════════════════════════════════════════
   10 · CLOSING CTA (discrete, contextual)
   ═══════════════════════════════════════════════════════════════ */
.pat-cta {
  padding: 5rem var(--ptl-pad-x) 6rem;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.pat-cta-row {
  display: inline-flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 1.5rem;
}
.pat-cta-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--ptl-r-pill);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--ptl-t-fast) var(--ptl-ease-out),
              background var(--ptl-t-fast) var(--ptl-ease-out),
              color var(--ptl-t-fast) var(--ptl-ease-out),
              border-color var(--ptl-t-fast) var(--ptl-ease-out);
}
.pat-cta-link--primary {
  background: var(--ptl-orange);
  color: var(--ptl-surface-alt);
  border: 1px solid var(--ptl-orange);
}
.pat-cta-link--primary:hover {
  background: var(--ptl-orange-hover);
  border-color: var(--ptl-orange-hover);
  transform: translateY(-1px);
}
.pat-cta-link--ghost {
  background: transparent;
  color: var(--ptl-text);
  border: 1px solid var(--ptl-border-strong);
}
.pat-cta-link--ghost:hover {
  background: var(--ptl-surface);
  transform: translateY(-1px);
}

/* ═══════════════════════════════════════════════════════════════
   11 · STAGGER DELAYS (cards revelan en cascada suave)
   ═══════════════════════════════════════════════════════════════ */
.pat-grid .fade-up:nth-child(2) { transition-delay: 0.08s; }
.pat-grid .fade-up:nth-child(3) { transition-delay: 0.16s; }
.pat-grid .fade-up:nth-child(4) { transition-delay: 0.24s; }
.pat-grid .fade-up:nth-child(5) { transition-delay: 0.32s; }
.pat-grid .fade-up:nth-child(6) { transition-delay: 0.40s; }

.pat-img-grid .fade-up:nth-child(2) { transition-delay: 0.10s; }

/* ═══════════════════════════════════════════════════════════════
   12 · RESPONSIVE (900px tablet · 640px mobile)
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .pat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .pat-hero {
    padding: calc(var(--ptl-nav-h) + 3rem) 0 3rem;
  }
  .pat-bigstat {
    padding: 2rem var(--ptl-pad-x) 4rem;
  }
  .pat-section {
    padding: 4.5rem 0;
  }
  .pat-section-head {
    margin-bottom: 2.5rem;
  }
  .pat-img-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .pat-img-card figcaption {
    padding: 1.25rem 1.5rem 1.5rem;
  }
}

@media (max-width: 640px) {
  .pat-inner {
    padding: 0 var(--ptl-pad-x-mobile);
  }
  .pat-hero {
    padding: calc(var(--ptl-nav-h) + 2rem) 0 2.25rem;
  }
  .pat-hero-inner {
    padding: 0 var(--ptl-pad-x-mobile);
  }
  .pat-bigstat {
    padding: 1rem var(--ptl-pad-x-mobile) 3rem;
  }
  .pat-section {
    padding: 3.5rem 0;
  }
  .pat-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .pat-card,
  .pat-ex-card {
    padding: 1.75rem;
  }
  .pat-ex-card::before {
    top: 1.75rem;
    left: 1.75rem;
  }
  .pat-ex-card .pat-card-h3 {
    margin-top: 1.5rem;
  }
  .pat-cta {
    padding: 3.5rem var(--ptl-pad-x-mobile) 4.5rem;
  }
  .pat-cta-link {
    padding: 0.75rem 1.125rem;
    font-size: 0.875rem;
  }
}

/* ═══════════════════════════════════════════════════════════════
   13 · PREFERS-REDUCED-MOTION (anula transforms + transitions)
   ═══════════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  .pat-card,
  .pat-ex-card,
  .pat-img-card,
  .pat-cta-link {
    transition: none !important;
  }
  .pat-card:hover,
  .pat-ex-card:hover,
  .pat-img-card:hover,
  .pat-cta-link:hover {
    transform: none !important;
  }
  .pat-grid .fade-up,
  .pat-img-grid .fade-up {
    transition-delay: 0s !important;
  }
}

/* ═══════════════════════════════════════════════════════════════
   14 · PRINT (limpio, sin color, sin decoración)
   ═══════════════════════════════════════════════════════════════ */
@media print {
  .pat-cta {
    display: none;
  }
  .pat-hero {
    background: transparent;
    border-bottom: 1px solid var(--ptl-border);
  }
  .pat-card,
  .pat-ex-card,
  .pat-img-card {
    box-shadow: none;
    border-color: var(--ptl-border);
    break-inside: avoid;
  }
  .pat-section {
    padding: 2rem 0;
    content-visibility: visible;
  }
}