/* =====================
   CASE STUDY PAGES
   ===================== */

/* ---- Header ---- */
.case-header {
  background: var(--c-page);
  padding: calc(var(--nav-h) + var(--sp-16)) var(--sp-8) var(--sp-20);
}
.case-header-inner { max-width: 860px; margin: 0 auto; }

.case-back {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  min-height: var(--touch);
  font-size: 0.6875rem; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--c-text-3); text-decoration: none;
  margin-bottom: var(--sp-10);
  transition: color 0.2s var(--ease);
  opacity: 0;
  animation: slideUp 0.7s var(--ease) 0.1s forwards;
}
.case-back:hover { color: var(--c-action); }

.case-industry {
  font-size: 0.6875rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--c-action); margin-bottom: var(--sp-3);
  opacity: 0;
  animation: slideUp 0.7s var(--ease) 0.2s forwards;
}

.case-title {
  font-size: clamp(2.2rem, 6vw, 5rem);
  font-weight: 800; line-height: 1.0;
  letter-spacing: -0.03em; color: var(--c-text-1);
  margin-bottom: var(--sp-8);
  opacity: 0;
  animation: slideUp 0.85s var(--ease) 0.3s forwards;
}

.case-chips {
  display: flex; flex-wrap: wrap; gap: var(--sp-2);
  opacity: 0;
  animation: slideUp 0.7s var(--ease) 0.5s forwards;
}
.case-chip {
  font-size: 0.6875rem; font-weight: 500;
  letter-spacing: 0.06em;
  padding: var(--sp-2) var(--sp-4); border-radius: 2px;
  border: 1px solid var(--c-border-strong);
  color: var(--c-text-2);
}

/* ---- Sections ---- */
.case-section { padding: var(--sp-20) var(--sp-8); background: var(--c-subtle); }
.case-section--light { background: var(--c-page); }
.case-section--dark  { background: var(--c-green-900); }

/* ---- Body grid: label | content ---- */
.case-body {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--sp-12);
  max-width: 860px; margin: 0 auto;
  align-items: start;
}
.case-lead { padding-top: 0.15em; }
.case-lead .section-label { line-height: 1.5; }
.case-section--dark .section-label { color: var(--c-green-200); }

/* ---- Content typography ---- */
.case-content p {
  font-size: 1.0625rem; font-weight: 300;
  line-height: 1.75; color: var(--c-text-2);
  max-width: 60ch; margin-bottom: var(--sp-4);
}
.case-content p:last-child { margin-bottom: 0; }
.case-content p strong { color: var(--c-text-1); font-weight: 600; }

.case-content .case-intro {
  font-size: 1.2rem; font-weight: 300;
  color: var(--c-text-1); line-height: 1.65;
}

/* On dark sections */
.case-section--dark .case-content p { color: var(--c-text-inv-2); }
.case-section--dark .case-content p strong { color: var(--c-text-inv); }

/* ---- General list (role, demonstrates) ---- */
.case-list { list-style: none; padding: 0; }
.case-list li {
  font-size: 1.0625rem; font-weight: 300;
  line-height: 1.7; color: var(--c-text-2);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--c-border);
}
.case-list li:first-child { border-top: 1px solid var(--c-border); }

/* Compact variant (approach sub-lists) */
.case-list--compact li {
  font-size: 0.9375rem;
  padding: var(--sp-2) 0;
}
.case-list--compact + p { margin-top: var(--sp-6); }

/* ---- Problems list ---- */
.case-problems-list { list-style: none; padding: 0; }
.case-problems-list li {
  display: grid; grid-template-columns: 2.5rem 1fr;
  gap: var(--sp-4); align-items: baseline;
  padding: var(--sp-5) 0;
  border-bottom: 1px solid var(--c-border);
}
.case-problems-list li:first-child { border-top: 1px solid var(--c-border); }
.problem-n {
  font-size: 0.6875rem; font-weight: 500;
  letter-spacing: 0.08em; color: var(--c-text-3);
}
.case-problems-list li p {
  font-size: 1.0625rem; font-weight: 400;
  color: var(--c-text-1); margin: 0;
  line-height: 1.45; max-width: none;
}

/* Sub-description inside numbered list items (workshops, process phases) */
.case-problems-list li .problem-sub {
  font-size: 0.9375rem; font-weight: 300;
  color: var(--c-text-2); margin-top: var(--sp-2);
}

/* ---- Results list (dark bg) ---- */
.case-results-list { list-style: none; padding: 0; }
.case-results-list li {
  font-size: 1.0625rem; font-weight: 300;
  line-height: 1.7; color: var(--c-text-inv-2);
  padding: var(--sp-4) 0;
  border-bottom: 1px solid var(--c-border-inv);
}
.case-results-list li:first-child { border-top: 1px solid var(--c-border-inv); }

/* ---- Image placeholder ---- */
.case-image-wrap {
  background: var(--c-subtle);
  padding: var(--sp-8) var(--sp-8) var(--sp-12);
}
.case-image {
  max-width: 860px; margin: 0 auto;
  aspect-ratio: 16/9;
  background: var(--c-elevated);
  border: 1px solid var(--c-border);
  border-radius: 3px;
  display: flex; align-items: center; justify-content: center;
}
.case-image-label {
  font-family: var(--font-serif); font-style: italic;
  font-size: 1rem; color: var(--c-text-3);
}

/* ---- Next case navigation ---- */
.case-nav {
  background: var(--c-page);
  border-top: 1px solid var(--c-border);
  padding: var(--sp-12) var(--sp-8);
}
.case-nav-link {
  display: flex; flex-direction: column; gap: var(--sp-2);
  max-width: 860px; margin: 0 auto;
  min-height: var(--touch);
  text-decoration: none;
}
.case-nav-label {
  font-size: 0.6875rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--c-text-3);
}
.case-nav-title {
  font-size: clamp(1.3rem, 2.5vw, 1.9rem);
  font-weight: 700; letter-spacing: -0.02em;
  color: var(--c-text-1);
  transition: color 0.2s var(--ease);
}
.case-nav-link:hover .case-nav-title { color: var(--c-action); }

/* ---- Image wrap variant (light bg continuation) ---- */
.case-image-wrap--light { background: var(--c-page); }

/* ---- Image pair (2 images side by side) ---- */
.case-image-pair {
  max-width: 860px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
}
.case-image-pair > *,
.case-image-triple > * { min-width: 0; }
.case-image-pair .case-image { max-width: none; margin: 0; }

/* ---- Figure (pair, triple, single) ---- */
.case-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.case-figure img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
  border: 1px solid var(--c-border);
}
.case-figure figcaption {
  font-size: 0.8125rem;
  color: var(--c-text-3);
  line-height: 1.5;
}
/* Single image centrada dentro do wrap */
.case-figure--single {
  max-width: 860px;
  margin: 0 auto;
}

/* ---- Mini-case chapter break ---- */
.case-mini-break {
  background: var(--c-page);
  border-top: 1px solid var(--c-border-strong);
  padding: var(--sp-16) var(--sp-8) var(--sp-12);
}
.case-mini-break-inner { max-width: 860px; margin: 0 auto; }
.case-mini-label {
  font-size: 0.6875rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--c-text-3); margin-bottom: var(--sp-4);
}
.case-mini-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800; line-height: 1.05;
  letter-spacing: -0.025em; color: var(--c-text-1);
}
.case-mini-em {
  font-family: var(--font-serif);
  font-style: italic; font-weight: 300;
  color: var(--c-action);
}

/* ---- Image triple (3 images side by side) ---- */
.case-image-triple {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}
.case-image-triple .case-image { max-width: none; margin: 0; }

/* Triple → 2 colunas em tablet */
@media (max-width: 900px) {
  .case-image-triple { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .case-image-pair   { grid-template-columns: 1fr; }
  .case-image-triple { grid-template-columns: 1fr; }
}

/* ---- DELIGHT ---- */

/* Reading progress bar */
.case-progress {
  position: fixed; top: var(--nav-h); left: 0;
  width: 100%; height: 2px; z-index: 99;
  background: var(--c-action);
  transform: scaleX(0); transform-origin: left center;
  pointer-events: none;
}

/* Back link: arrow nudges left on hover */
.case-back span[aria-hidden] {
  display: inline-block;
  transition: transform 0.2s var(--ease);
}
.case-back:hover span[aria-hidden] { transform: translateX(-3px); }

/* Problems list: stagger entrance (translateY only — opacity via parent .reveal) */
.case-problems-list li {
  transform: translateY(10px);
  transition: transform 0.45s var(--ease);
}
.case-problems-list.animated li              { transform: none; }
.case-problems-list.animated li:nth-child(1) { transition-delay: 0s; }
.case-problems-list.animated li:nth-child(2) { transition-delay: 0.08s; }
.case-problems-list.animated li:nth-child(3) { transition-delay: 0.16s; }
.case-problems-list.animated li:nth-child(4) { transition-delay: 0.24s; }
.case-problems-list.animated li:nth-child(5) { transition-delay: 0.32s; }

/* ---- Lightbox trigger ---- */
.case-figure-btn {
  display: block; width: 100%;
  padding: 0; border: none; background: none;
  cursor: zoom-in;
  border-radius: 6px;
  position: relative;
}
.case-figure-btn:focus-visible {
  outline: 3px solid var(--c-action);
  outline-offset: 3px;
}
.case-figure-btn img {
  display: block; width: 100%; height: auto;
  border-radius: 6px;
  border: 1px solid var(--c-border);
  transition: opacity 0.2s var(--ease);
}
.case-figure-btn:hover img,
.case-figure-btn:focus-visible img { opacity: 0.88; }
/* zoom hint icon */
.case-figure-btn::after {
  content: '';
  position: absolute; bottom: var(--sp-3); right: var(--sp-3);
  width: 28px; height: 28px;
  background: oklch(20% 0 0 / 0.55) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3Cline x1='11' y1='8' x2='11' y2='14'/%3E%3Cline x1='8' y1='11' x2='14' y2='11'/%3E%3C/svg%3E") center/14px no-repeat;
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.2s var(--ease);
  pointer-events: none;
}
.case-figure-btn:hover::after,
.case-figure-btn:focus-visible::after { opacity: 1; }

/* ---- Lightbox modal ---- */
.img-modal {
  position: fixed; inset: 0; z-index: 900;
  display: flex; align-items: center; justify-content: center;
  padding: var(--sp-6);
}
.img-modal[hidden] { display: none; }
.img-modal-backdrop {
  position: absolute; inset: 0;
  background: oklch(10% 0 0 / 0.82);
  backdrop-filter: blur(6px);
}
.img-modal-inner {
  position: relative; z-index: 1;
  max-width: min(1200px, 100%);
  max-height: calc(100dvh - var(--sp-12));
  display: flex; flex-direction: column;
  gap: var(--sp-3);
}
.img-modal-img {
  display: block;
  max-width: 100%; max-height: calc(100dvh - 120px);
  width: auto; height: auto;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 24px 80px oklch(0% 0 0 / 0.5);
}
.img-modal-caption {
  font-size: 0.8125rem;
  color: oklch(88% 0 0 / 0.7);
  text-align: center;
  line-height: 1.5;
}
.img-modal-close {
  position: absolute; top: calc(-1 * var(--sp-10)); right: 0;
  width: 36px; height: 36px;
  background: oklch(100% 0 0 / 0.12);
  border: 1px solid oklch(100% 0 0 / 0.2);
  border-radius: 50%;
  color: #fff; font-size: 1.25rem; line-height: 1;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s var(--ease);
}
.img-modal-close:hover { background: oklch(100% 0 0 / 0.22); }
.img-modal-close:focus-visible {
  outline: 3px solid var(--c-action);
  outline-offset: 3px;
}

/* Animação de entrada */
@media (prefers-reduced-motion: no-preference) {
  .img-modal-backdrop { animation: modal-fade 0.22s var(--ease) both; }
  .img-modal-inner    { animation: modal-up   0.28s var(--ease) both; }
  @keyframes modal-fade { from { opacity: 0; } to { opacity: 1; } }
  @keyframes modal-up   { from { opacity: 0; transform: translateY(12px) scale(0.98); } to { opacity: 1; transform: none; } }
}

/* ---- Responsive ---- */
@media (max-width: 700px) {
  .case-header { padding: calc(var(--nav-h) + var(--sp-10)) var(--sp-4) var(--sp-12); }
  .case-section { padding: var(--sp-12) var(--sp-4); }
  .case-image-wrap { padding: var(--sp-6) var(--sp-4) var(--sp-8); }
  .case-mini-break { padding: var(--sp-8) var(--sp-4); }
  .case-nav { padding: var(--sp-8) var(--sp-4); }
  .case-body { grid-template-columns: 1fr; gap: var(--sp-5); }
  /* Lightbox: botão de fechar maior e modal com espaço no topo */
  .img-modal { padding: var(--sp-12) var(--sp-3) var(--sp-3); align-items: flex-start; overflow-y: auto; }
  .img-modal-inner { max-height: none; }
  .img-modal-img { max-height: 75dvh; }
  .img-modal-close { width: 44px; height: 44px; font-size: 1.1rem; top: calc(-1 * var(--sp-11)); }
}