:root {
  --c-bg: #dfe4dd;
  --c-ink: #363e32;
  --c-muted: rgba(54, 62, 50, .55);
  --c-dim: #6c7d64;
  --c-line: rgba(54, 62, 50, .24);
  --c-rule: rgba(54, 62, 50, .12);
  --c-slot: #d3d9d0;
  --font: 'Jost', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: 'Geist Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --pad: 56px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body { background: var(--c-bg); color: var(--c-ink); }
body {
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }

/* ---------- 07 Case studies ---------- */

.cases {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 150px var(--pad) 120px;
  overflow: hidden;
}

.cases__inner {
  position: relative;
  width: 100%;
  max-width: 1328px;
  margin: 0 auto;
}

/* Header + panel float over the empty corners the diagonal line leaves */
.cases__head {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 24px;
  pointer-events: none;
}
.cases__label {
  font: 400 11px/normal var(--mono);
  letter-spacing: .44px;
  color: var(--c-dim);
}
.cases__title {
  width: 560px;
  font: 400 40px/1.05 var(--font);
  letter-spacing: -1.2px;
  color: var(--c-ink);
}
.cases__title span { color: var(--c-muted); }

/* ---------- Folder line ---------- */

.cases__stage {
  position: relative;
  z-index: 1;
  touch-action: pan-y;
  outline: none;
  user-select: none;
  -webkit-user-select: none;
}
.cases__stage:focus-visible { outline: 1px solid var(--c-dim); outline-offset: 10px; border-radius: 14px; }
.cases.is-dragging .cases__stage { cursor: grabbing; }

.folder {
  --r: 0;     /* open: the folder has become its photo */
  --draw: 0;  /* line draw-in */
  position: absolute;
  left: 0;
  top: 0;
  transform-origin: 0 0;
  opacity: var(--fade, 1);
  will-change: transform;
  pointer-events: none;
}

.folder__lines {
  position: absolute;
  left: 0;
  overflow: visible;
}
.folder__line {
  fill: var(--c-bg);
  fill-opacity: var(--draw);
  stroke: var(--c-ink);
  stroke-width: var(--sw, .5);
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: calc(1 - var(--draw));
}
/* An open folder is just its photo — the outline steps aside */
.folder__back { opacity: calc(1 - var(--r)); }
.folder__flap { stroke-opacity: calc(1 - var(--r)); }

.folder__photo {
  position: absolute;
  overflow: hidden;
  background: var(--c-slot);
  opacity: var(--r);
}
.folder__photo img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(calc(1.14 - .14 * var(--r)));
}

/* ---------- Hint ---------- */

.cases__hint {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 8px;
  font: 400 10px/1 var(--mono);
  letter-spacing: .4px;
  color: var(--c-dim);
  pointer-events: none;
}
.cases__hint::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-ink);
  animation: live 1.4s ease-in-out infinite;
}
@keyframes live { 50% { opacity: .35; } }

/* ---------- Case panel ---------- */

.cases__info {
  position: absolute;
  right: 0;
  bottom: 0;
  z-index: 4;
  width: 372px;
}

.info__count {
  display: block;
  margin-bottom: 18px;
  font: 400 11px/normal var(--mono);
  letter-spacing: .44px;
  color: var(--c-dim);
  font-variant-numeric: tabular-nums;
}

.info__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.cases__tag {
  padding: 5px 10px;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  font: 400 10px/normal var(--mono);
  letter-spacing: .4px;
  white-space: nowrap;
  color: var(--c-ink);
}

.info__title {
  min-height: 2.4em;
  font: 400 22px/1.2 var(--font);
  letter-spacing: -.22px;
  color: var(--c-ink);
}
.info__text {
  min-height: 4.35em;
  margin-top: 12px;
  font: 400 14px/1.45 var(--font);
  color: var(--c-dim);
}

.info__foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--c-rule);
}
.info__stat { display: flex; flex-direction: column; gap: 4px; }
.info__num {
  font: 400 28px/normal var(--font);
  letter-spacing: -.84px;
  font-variant-numeric: tabular-nums;
  color: var(--c-ink);
}
.info__label { font: 400 13px/normal var(--font); color: var(--c-dim); }
.info__link {
  font: 400 11px/normal var(--mono);
  letter-spacing: .44px;
  color: var(--c-ink);
  transition: opacity .2s ease;
}
.info__link:hover { opacity: .6; }

/* ---------- Responsive ---------- */

/* Too narrow for the corners to hold the header and panel — they stack around it */
@media (max-width: 1099px) {
  .cases__head { position: static; gap: 16px; }
  .cases__hint { position: static; margin-top: 12px; }
  .cases__info { position: static; width: auto; max-width: 520px; margin: 36px 0 0 auto; }
}

@media (max-width: 759px) {
  :root { --pad: 20px; }
  .cases { padding: 96px var(--pad) 72px; }
  .cases__title { width: auto; font-size: clamp(28px, 8.4vw, 36px); letter-spacing: -1px; }
  .cases__info { max-width: none; margin: 28px 0 0; }
  .info__title { font-size: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  .cases__hint::before { animation: none; }
}