/* ============================================================
   RESEARCH — v2 spatial edition (sticky split editorial)
   Página: research.html · Fase 2 (agente D)
   Contratos: #research-video intocado (click-to-play, poster,
   preload=none; fullscreen gerido inline pelo app.js).
   Nota: exhibitions-grid.css carrega depois desta folha e tem
   um .section-title genérico — qualificar com #research.
   Tese v2: sticky split (tese fixa / corpo rola), full-bleed no
   vídeo e na linha editorial, echo outline como arquitetura,
   HUD mono nas bordas — ver docs/redesign/SPATIAL-V2.md.
   ============================================================ */

/* ---------- Primitivo de página: full-bleed com propósito ---------- */
#research .u-bleed {
  width: 100vw;
  margin-inline: calc(50% - 50vw);
}

/* ---------- Container ---------- */
#research .research-container {
  width: var(--container);
  margin-inline: auto;
  padding-top: var(--space-8);
  padding-bottom: var(--space-16);
}

/* Hero removido (pedido do dono 2026-07-08): a página abre direto no
   filme; h1 sr-only. O ledger (Nature / Technology / Hidden Patterns /
   Ongoing) vive no HUD sticky do split, como entrada "Research". */

/* ---------- Vídeo: full-bleed com ledger HUD ancorado ---------- */
#research .research-video-section {
  /* topo enxuto: o filme abre a página logo sob a nav */
  margin: var(--space-6) 0 var(--space-16);
}

#research .research-video-frame {
  position: relative;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  background: var(--void);
}

#research .research-video {
  display: block;
  width: 100%;
  height: auto;
  max-height: 92dvh;
  margin-inline: auto;
  object-fit: contain;
  background: var(--void);
}

/* Controle discreto de unmute (broadcast, mono) — mostrado só quando o
   autoplay com som é bloqueado pelo browser e o vídeo cai para muted. */
#research .research-sound-toggle {
  position: absolute;
  right: var(--space-4);
  bottom: var(--space-4);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  background: rgba(6, 0, 9, 0.72);
  border: 1px solid var(--line-strong);
  cursor: pointer;
  backdrop-filter: blur(4px);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  z-index: 2;
}

#research .research-sound-toggle::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--violet);
}

#research .research-sound-toggle:hover,
#research .research-sound-toggle:focus-visible {
  color: var(--violet-light);
  border-color: var(--violet);
  background: rgba(6, 0, 9, 0.9);
}

#research .research-sound-toggle[hidden] {
  display: none;
}

/* some no fullscreen nativo do vídeo (o overlay não deve cobrir o player) */
#research .research-video:fullscreen ~ .research-sound-toggle,
#research .research-video:-webkit-full-screen ~ .research-sound-toggle {
  display: none;
}

/* ---------- Linha editorial borda a borda ---------- */
#research .research-edgeline {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-6);
  padding: var(--space-6) var(--space-8);
  margin: var(--space-16) 0 var(--space-8);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

#research .research-edgeline-num {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  font-weight: 800;
  font-variation-settings: 'wdth' 72;
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

#research .research-edgeline-data {
  color: var(--ink-dim);
  text-align: right;
  max-width: 60ch;
}

/* ---------- Sticky split: tese fixa / corpo rolante ---------- */
#research .research-split {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  gap: var(--space-16);
  align-items: start;
}

/* Scrim full-bleed sob o long-form (mesmo idioma do .home-valley da
   home): parágrafos em --ink-dim disputavam com os glifos do glitch
   ambient — entrada/saída em gradiente, sem placa visível. */
#research .research-split::before {
  content: '';
  position: absolute;
  inset: 0;
  left: calc(50% - 50vw);
  width: 100vw;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgba(6, 0, 9, 0) 0%,
    rgba(6, 0, 9, 0.68) clamp(48px, 8vh, 120px),
    rgba(6, 0, 9, 0.68) calc(100% - clamp(48px, 8vh, 120px)),
    rgba(6, 0, 9, 0) 100%
  );
}

#research .research-split-sticky {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-8));
  padding: var(--space-8) 0;
  border-top: 1px solid var(--line);
  overflow: hidden;
}

/* palavra vazada gigante como textura atras da tese */
#research .research-split-echo {
  position: absolute;
  top: -0.1em;
  left: -0.04em;
  /* Fecha a caixa na largura da coluna: a máscara abaixo dissolve a
     palavra antes do overflow:hidden do sticky — sem corte seco no
     meio do glifo ("PATTERI"). no-repeat mata o que passa da caixa. */
  right: 0;
  -webkit-mask-image: linear-gradient(90deg, #000 55%, transparent 97%);
  mask-image: linear-gradient(90deg, #000 55%, transparent 97%);
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 9vw, 6.5rem);
  font-weight: 800;
  font-variation-settings: 'wdth' 68;
  line-height: 0.9;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  opacity: 0.5;
  white-space: nowrap;
  user-select: none;
  pointer-events: none;
}

#research .research-split-number {
  position: relative;
  display: block;
  color: var(--ink-dim);
  margin-bottom: var(--space-6);
}

#research .research-split-thesis {
  position: relative;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 1.9vw, 1.7rem);
  font-weight: 600;
  font-variation-settings: 'wdth' 80;
  line-height: 1.35;
  color: var(--ink);
  max-width: 34ch;
  margin: 0 0 var(--space-8);
}

#research .research-split-hud {
  position: relative;
  margin: 0;
  padding-top: var(--space-6);
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

#research .research-split-hud > div {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

#research .research-split-hud dt {
  color: var(--ink);
}

#research .research-split-hud dd {
  margin: 0;
  color: var(--ink-dim);
}

/* ---------- Corpo long-form: numeração + termos-chave na margem ---------- */
#research .research-split-scroll {
  padding-bottom: var(--space-16);
}

#research .research-block {
  display: grid;
  grid-template-columns: minmax(56px, 88px) minmax(0, 1fr);
  gap: var(--space-4) var(--space-8);
  padding: var(--space-8) 0;
  border-top: 1px solid var(--line);
}

#research .research-split-scroll > .research-block:first-child {
  border-top: none;
}

#research .research-block-index {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.4vw, 2.8rem);
  font-weight: 800;
  font-variation-settings: 'wdth' 72;
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--line-strong);
  font-variant-numeric: tabular-nums;
  padding-top: 0.1em;
}

#research .research-block-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

#research .research-coord {
  color: var(--ink-dim);
  opacity: 0.75;
}

#research .research-paragraph {
  margin: var(--space-2) 0 0;
  color: var(--ink-dim);
  max-width: 65ch;
}

/* Lead: primeiro parágrafo maior */
#research .research-block--lead .research-paragraph {
  font-size: clamp(1.2rem, 1.7vw, 1.45rem);
  line-height: 1.55;
  color: var(--ink);
}

/* ---------- Pull-quotes display gigantes (largura total do corpo) ---------- */
#research .research-quote {
  position: relative;
  max-width: none;
  margin: var(--space-16) 0;
  padding: var(--space-12) 0 var(--space-8);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

#research .research-quote::before {
  content: '//';
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  margin-bottom: var(--space-6);
}

#research .research-quote p {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.2vw, 3.8rem);
  font-weight: 780;
  font-variation-settings: 'wdth' 73;
  line-height: 1;
  letter-spacing: -0.015em;
  text-transform: uppercase;
  text-wrap: balance;
  color: var(--ink);
  max-width: none;
  margin: 0;
}

#research .research-quote footer {
  margin-top: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* ---------- Responsivo ---------- */
@media (max-width: 1023px) {
  #research .research-split {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  #research .research-split-sticky {
    position: static;
    padding-bottom: var(--space-8);
  }

  #research .research-split-echo {
    opacity: 0.35;
  }

  #research .research-split-thesis {
    max-width: 60ch;
  }

  #research .research-split-hud {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-6);
  }
}

@media (max-width: 820px) { /* TODO(bp): candidato a --bp-sm/--bp-md, ver plano mobile */
  #research .research-block {
    grid-template-columns: minmax(0, 1fr);
  }

  #research .research-block-index {
    font-size: 1.6rem;
  }

  #research .research-edgeline {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  #research .research-edgeline-data {
    text-align: left;
  }

  #research .research-quote {
    margin: var(--space-12) 0;
  }
}