/* ============================
   CASE STUDY
   Builds on styles.css: same column, tokens, light/dark themes and switch as the home page.
   Structure: breadcrumb, headline and facts, problems, what I did, the solution, one block per
   product flow (problem → solution, then its screens), impact, learnings.
   Text stays in the 600px column; screens get a little more room (--case-wide).
   ============================ */
:root {
  --color-body: rgba(21, 21, 21, 0.78);
  --case-wide: min(760px, 100vw - 48px);
  --case-line: rgba(21, 21, 21, 0.09);
  --nav-veil: rgba(255, 255, 255, 0.82);
  --problem-bg: #f8efd7;
  --problem-ink: #3b321c;
  --problem-label: #8a6a1f;
  --solution-bg: #e5f3ea;
  --solution-ink: #1e3a29;
  --solution-label: #2d7a4e;
}

:root[data-theme="dark"] {
  --color-body: rgba(237, 237, 236, 0.76);
  --case-line: rgba(255, 255, 255, 0.09);
  --nav-veil: rgba(14, 14, 15, 0.82);
  --problem-bg: rgba(234, 179, 8, 0.12);
  --problem-ink: #efe1b9;
  --problem-label: #d8b45c;
  --solution-bg: rgba(34, 197, 94, 0.12);
  --solution-ink: #cfeadb;
  --solution-label: #6fcf97;
}

.case {
  gap: 0;
}

.case-wide {
  width: var(--case-wide);
  max-width: none;
  margin-left: calc((100% - var(--case-wide)) / 2);
}

/* ---------- top: breadcrumb on the left, theme switch on the right ---------- */
.case-crumbs {
  position: absolute;
  top: 24px;
  left: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 20px;
}

.case-crumbs a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.15s;
}

.case-crumbs a:hover,
.case-crumbs a:focus-visible {
  color: var(--color-ink);
}

.case-crumbs__here {
  color: var(--color-ink);
}

/* ---------- hero: headline, intro, facts, video ---------- */
.case-hero {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-top: 84px;
}

.case-title {
  font-size: 38px;
  font-weight: 500;
  line-height: 44px;
  letter-spacing: -0.03em;
}

.case-lede {
  color: var(--color-body);
  font-size: 15px;
  line-height: 25px;
}

.case-facts {
  margin-top: 8px;
  border-top: 1px solid var(--case-line);
  border-bottom: 1px solid var(--case-line);
}

.case-facts div {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 16px;
  padding: 11px 0;
}

.case-facts div + div {
  border-top: 1px solid var(--case-line);
}

.case-facts dt {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 20px;
}

.case-facts dd {
  font-size: 14px;
  line-height: 20px;
}

.case-icon {
  flex-shrink: 0;
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.case-cover {
  position: relative;
  aspect-ratio: 3 / 2;
  margin-top: 20px;
  overflow: hidden;
  border-radius: 12px;
  background: var(--color-cover);
  isolation: isolate;
  clip-path: inset(0 round 12px);
}

.case-cover video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

[data-theme="dark"] .case-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.07);
  pointer-events: none;
}

/* hero arrives in a short stagger, like the home intro */
.case-intro > * {
  animation: block-intro 0.45s var(--ease-out-soft) backwards;
}

.case-intro > :nth-child(1) { animation-delay: 0.04s; }
.case-intro > :nth-child(2) { animation-delay: 0.1s; }
.case-intro > :nth-child(3) { animation-delay: 0.16s; }
.case-intro > :nth-child(4) { animation-delay: 0.22s; }

.case-crumbs,
.case > .theme-toggle {
  animation: block-intro 0.45s var(--ease-out-soft) backwards;
}

/* ---------- sections ---------- */
.case-body {
  display: flex;
  flex-direction: column;
  gap: 88px;
  margin-top: 88px;
}

.case-section {
  display: flex;
  flex-direction: column;
  gap: 14px;
  scroll-margin-top: 24px;
}

.case-section > h2 {
  margin-bottom: 6px;
  font-size: 28px;
  font-weight: 500;
  line-height: 34px;
  letter-spacing: -0.025em;
}

.case-section p,
.case-section li {
  color: var(--color-body);
  font-size: 15px;
  line-height: 25px;
}

.case-section strong {
  color: var(--color-ink);
  font-weight: 500;
}

.case-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
}

.case-list li {
  position: relative;
  padding-left: 20px;
}

.case-list li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 6px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-muted);
}

/* ---------- "What I did" / "Learnings": a two-column grid with hairlines ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 6px;
}

.case-grid__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 26px 24px 0;
  border-top: 1px solid var(--case-line);
}

.case-grid__item:nth-child(-n + 2) {
  border-top: 0;
  padding-top: 4px;
}

.case-grid__item:nth-child(even) {
  padding-right: 0;
  padding-left: 26px;
  border-left: 1px solid var(--case-line);
}

.case-grid__item h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-ink);
  font-size: 15px;
  font-weight: 500;
  line-height: 22px;
}

.case-grid__item p {
  font-size: 14px;
  line-height: 22px;
}

.case-grid__num {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
}

/* ---------- product flows ---------- */
.case-flows {
  display: flex;
  flex-direction: column;
  gap: 80px;
  margin-top: 40px;
}

.case-flow {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.case-eyebrow {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 16px;
}

.case-flow h3 {
  margin-top: -6px;
  font-size: 22px;
  font-weight: 500;
  line-height: 28px;
  letter-spacing: -0.02em;
}

/* problem → solution pair */
.case-ps {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: stretch;
  gap: 12px;
  margin: 4px 0 2px;
}

.case-ps__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px 16px;
  border-radius: 10px;
}

.case-ps__card--problem { background: var(--problem-bg); }
.case-ps__card--solution { background: var(--solution-bg); }

.case-ps__label {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.case-ps__card--problem .case-ps__label { color: var(--problem-label); }
.case-ps__card--solution .case-ps__label { color: var(--solution-label); }

.case-section .case-ps__card p {
  font-size: 14px;
  font-weight: 500;
  line-height: 21px;
}

.case-section .case-ps__card--problem p { color: var(--problem-ink); }
.case-section .case-ps__card--solution p { color: var(--solution-ink); }

.case-ps__arrow {
  align-self: center;
  color: var(--color-muted);
  font-size: 16px;
}

.case-section--flows .case-flows {
  margin-top: 0;
}

/* ---------- media ---------- */
.case-media {
  margin-top: 14px;
}

.case-shot {
  display: block;
  overflow: hidden;
  border-radius: 12px;
  background: var(--color-cover);
  cursor: zoom-in;
}

.case-shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.45s var(--ease-out-soft);
}

.case-shot:hover img {
  transform: scale(1.015);
}

[data-theme="dark"] .case-shot {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

/* gallery: one screen at a time, swipe or use the arrows / dots; a caption names each screen */
.case-gallery__track {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  overscroll-behavior-x: contain;
  border-radius: 12px;
}

.case-gallery__track::-webkit-scrollbar {
  display: none;
}

.case-gallery__track .case-shot {
  flex: 0 0 100%;
  aspect-ratio: var(--ratio, 1.5625);
  scroll-snap-align: center;
}

.case-gallery__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 12px;
}

.case-gallery__caption {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 18px;
}

.case-gallery__count {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 12px;
}

.case-gallery__label {
  overflow: hidden;
  color: var(--color-ink);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.case-gallery__controls {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  gap: 14px;
}

.case-gallery__dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.case-gallery[data-single="true"] .case-gallery__count,
.case-gallery[data-single="true"] .case-gallery__controls {
  display: none;
}

.case-dot {
  width: 6px;
  height: 6px;
  padding: 0;
  border-radius: 999px;
  background: var(--color-muted);
  opacity: 0.35;
  transition: width 0.35s var(--ease-out-soft), opacity 0.2s ease;
}

.case-dot:hover {
  opacity: 0.7;
}

.case-dot.active {
  width: 18px;
  background: var(--color-ink);
  opacity: 1;
}

.case-gallery__arrows {
  display: flex;
  gap: 6px;
}

.case-arrow {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-ink);
  transition: opacity 0.2s ease, transform 0.2s var(--ease-out-soft);
}

.case-arrow:hover {
  transform: scale(1.06);
}

.case-arrow:disabled {
  opacity: 0.35;
  cursor: default;
  transform: none;
}

/* client feedback: the main message, then two short ones side by side */
.case-feedback {
  display: grid;
  gap: 12px;
}

.case-feedback__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

/* ---------- next project + footer ---------- */
.case-next {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 104px;
  padding: 22px 24px;
  border-radius: 14px;
  background: var(--color-surface);
  transition: transform 0.3s var(--ease-out-soft);
}

.case-next:hover {
  transform: translateY(-2px);
}

.case-next__label {
  display: block;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 16px;
}

.case-next__title {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 2px;
  font-size: 15px;
  font-weight: 500;
  line-height: 22px;
}

.case-next__arrow {
  transition: transform 0.3s var(--ease-out-soft);
}

.case-next:hover .case-next__arrow {
  transform: translate(2px, -2px);
}

.case .page-footer {
  margin-top: 40px;
}

/* ---------- full-screen viewer ---------- */
.case-lightbox {
  position: fixed;
  z-index: 200;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 64px 72px 40px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.case-lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.case-lightbox__veil {
  position: absolute;
  inset: 0;
  background: var(--lightbox-veil);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.case-lightbox__stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 0;
  flex: 1;
  transform: scale(0.96);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.case-lightbox.active .case-lightbox__stage {
  transform: none;
}

.case-lightbox__img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 12px;
  background: var(--color-cover);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.14);
  cursor: zoom-in;
  object-fit: contain;
}

/* zoomed: the screen at full size inside a scrollable stage */
.case-lightbox.zoomed .case-lightbox__stage {
  display: block;
  overflow: auto;
}

.case-lightbox.zoomed .case-lightbox__img {
  max-width: none;
  max-height: none;
  width: min(var(--natural-w, 2000px), 220%);
  cursor: zoom-out;
}

.case-lightbox__close,
.case-lightbox__arrow {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--lightbox-cursor-edge);
  border-radius: 999px;
  background: var(--lightbox-cursor-bg);
  color: var(--lightbox-cursor-fg);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s var(--ease-out-soft);
}

.case-lightbox__close:hover,
.case-lightbox__arrow:hover {
  transform: scale(1.06);
}

.case-lightbox__close { top: 18px; right: 18px; }
.case-lightbox__arrow--prev { top: 50%; left: 18px; margin-top: -20px; }
.case-lightbox__arrow--next { top: 50%; right: 18px; margin-top: -20px; }

.case-lightbox__dots {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 6px;
}

.case-lightbox[data-single="true"] .case-lightbox__arrow,
.case-lightbox[data-single="true"] .case-lightbox__dots {
  display: none;
}

/* ---------- small screens ---------- */
@media (max-width: 640px) {
  .case-hero { padding-top: 76px; }
  .case-title { font-size: 30px; line-height: 36px; }
  .case-facts div { grid-template-columns: 112px 1fr; }
  .case-body { gap: 64px; }
  .case-section > h2 { font-size: 24px; line-height: 30px; }
  .case-grid { grid-template-columns: 1fr; }
  .case-grid__item,
  .case-grid__item:nth-child(even) { padding: 18px 0; border-left: 0; }
  .case-grid__item:nth-child(2) { border-top: 1px solid var(--case-line); padding-top: 18px; }
  .case-ps { grid-template-columns: 1fr; gap: 8px; }
  .case-ps__arrow { justify-self: center; transform: rotate(90deg); }
  .case-feedback__row { grid-template-columns: 1fr; }
  .case-gallery__arrows { display: none; }
  .case-lightbox { padding: 64px 12px 32px; }
  .case-lightbox__arrow { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .case-intro > *,
  .case-crumbs,
  .case > .theme-toggle {
    animation: none;
  }

  .case-shot img,
  .case-next,
  .case-lightbox__stage {
    transition: none;
  }
}