/* ============================================================
   CASE STUDY STYLES
   Extends css/style.css — do not import separately
   ============================================================ */

/* Per-page accent colour — override on :root in each page */
:root {
  --case-accent: #ff6f03;
}

/* ── Back link ─────────────────────────────────────────── */
.case-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-mid);
  text-decoration: none;
  transition: color 0.2s;
}
.case-back:hover { color: var(--text); }

/* ── Hero ──────────────────────────────────────────────── */
.case-hero {
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: calc(var(--nav-h) + 40px) 0 80px;
  position: relative;
  overflow: hidden;
}

.case-hero__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 60% 40%, color-mix(in srgb, var(--case-accent) 8%, transparent), transparent 70%);
  pointer-events: none;
}

.case-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.case-hero__year {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--case-accent);
}

.case-hero__tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.case-hero__tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-mid);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 2px;
}

.case-hero__title {
  font-family: var(--font-display);
  font-size: clamp(72px, 11vw, 148px);
  font-weight: 300;
  line-height: 0.92;
  color: var(--text);
  margin: 0 0 24px;
  letter-spacing: -0.02em;
}

.case-hero__subtitle {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.5vw, 36px);
  font-weight: 300;
  color: var(--text-mid);
  margin: 0;
  max-width: 640px;
}

/* ── Meta bar ─────────────────────────────────────────── */
.case-meta {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}

.case-meta__inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 32px;
}

.case-meta__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.case-meta__label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-mid);
}

.case-meta__value {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.5;
}

/* ── Sections ─────────────────────────────────────────── */
.case-section {
  padding: 96px 0;
}

.case-section--tinted {
  background: var(--bg-card);
}

.case-section--dark {
  background: var(--bg-dark);
}

.case-section--fullbleed {
  padding: 0;
}

.case-section__narrow {
  max-width: 760px;
}

/* Section tag — code-block style */
.case-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--case-accent);
  border: 1px solid color-mix(in srgb, var(--case-accent) 30%, transparent);
  background: color-mix(in srgb, var(--case-accent) 6%, transparent);
  padding: 4px 10px;
  border-radius: 2px;
  margin-bottom: 24px;
}

.case-heading {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 48px);
  font-weight: 300;
  color: var(--text);
  line-height: 1.15;
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}

.case-heading--sm {
  font-size: clamp(20px, 2.2vw, 32px);
  margin-bottom: 16px;
}

.case-body {
  font-size: 1.0625rem;
  color: var(--text-mid);
  line-height: 1.75;
  margin: 0 0 20px;
  max-width: 680px;
}

.case-body:last-child { margin-bottom: 0; }

.case-body strong {
  font-weight: 500;
  color: var(--text);
}

/* ── Problem / Solution / Validation ─────────────────── */
.case-psv {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.case-psv__block {}

.case-psv__label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--case-accent);
  display: block;
  margin-bottom: 10px;
}

.case-psv__text {
  font-size: 0.9375rem;
  color: var(--text-mid);
  line-height: 1.7;
  margin: 0;
}

/* ── Two-column layout ───────────────────────────────── */
.case-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.case-two-col--text-left .case-two-col__text { order: 0; }
.case-two-col--text-right .case-two-col__text { order: 1; }

@media (max-width: 768px) {
  .case-two-col { grid-template-columns: 1fr; gap: 40px; }
}

/* ── Images ──────────────────────────────────────────── */
.case-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
}

.case-image--bordered {
  border: 1px solid var(--border);
}

.case-image--rounded {
  border-radius: 16px;
}

.case-image--shadow {
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
}

.case-image-full {
  width: 100vw;
  max-width: 100vw;
  margin-left: calc(50% - 50vw);
  height: auto;
  display: block;
  object-fit: cover;
}

.case-image-grid {
  display: grid;
  gap: 16px;
  margin-top: 40px;
}

.case-image-grid--2 { grid-template-columns: 1fr 1fr; }
.case-image-grid--3 { grid-template-columns: 1fr 1fr 1fr; }

@media (max-width: 640px) {
  .case-image-grid--2,
  .case-image-grid--3 { grid-template-columns: 1fr; }
}

.case-image-caption {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--text-mid);
  margin-top: 10px;
  text-transform: uppercase;
}

/* ── Situation / Bullet lists ────────────────────────── */
.case-list {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.case-list li {
  font-size: 1rem;
  color: var(--text-mid);
  line-height: 1.65;
  padding-left: 20px;
  position: relative;
}

.case-list li::before {
  content: '↘';
  position: absolute;
  left: 0;
  color: var(--case-accent);
  font-size: 0.8rem;
}

/* ── Stats ───────────────────────────────────────────── */
.case-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 32px;
  margin-top: 48px;
  padding-top: 48px;
  border-top: 1px solid var(--border);
}

.case-stat__num {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 300;
  color: var(--text);
  line-height: 1;
  display: block;
}

.case-stat__label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-mid);
  margin-top: 6px;
  display: block;
}

/* ── Impact list ─────────────────────────────────────── */
.case-impact {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 40px;
}

.case-impact__item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.case-impact__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.case-impact__icon {
  color: var(--case-accent);
  font-size: 0.8rem;
  margin-top: 4px;
  flex-shrink: 0;
}

.case-impact__text {
  font-size: 1rem;
  color: var(--text-mid);
  line-height: 1.65;
  margin: 0;
}

/* ── Pull quote ──────────────────────────────────────── */
.case-pull {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.8vw, 36px);
  font-weight: 300;
  color: var(--text);
  line-height: 1.4;
  border-left: 3px solid var(--case-accent);
  padding-left: 28px;
  margin: 48px 0;
}

/* ── Workshop stats ──────────────────────────────────── */
.case-workshop-stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  margin: 40px 0;
}

.case-workshop-stat__num {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 300;
  color: var(--text);
  line-height: 1;
  display: block;
}

.case-workshop-stat__label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-mid);
  margin-top: 4px;
  display: block;
}

/* ── External link ───────────────────────────────────── */
.case-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--case-accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--case-accent) 30%, transparent);
  padding-bottom: 2px;
  transition: border-color 0.2s, color 0.2s;
}

.case-link:hover {
  border-color: var(--case-accent);
}

/* ── Divider ─────────────────────────────────────────── */
.case-divider {
  width: 48px;
  height: 1px;
  background: var(--case-accent);
  margin: 48px 0;
}

/* ── Case navigation (next/prev) ─────────────────────── */
.case-next {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  padding: 64px 0;
}

.case-next__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.case-next__link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-decoration: none;
  transition: opacity 0.2s;
}

.case-next__link:hover { opacity: 0.75; }

.case-next__eyebrow {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-mid);
}

.case-next__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 300;
  color: var(--text);
}

.case-next__arrow {
  color: var(--case-accent);
}

.case-back-link {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-mid);
  text-decoration: none;
  transition: color 0.2s;
}

.case-back-link:hover { color: var(--text); }

/* ── Design output grid (Feedzai) ────────────────────── */
.case-output-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 48px;
}

.case-output-col {
  background: var(--bg-card);
  padding: 40px 32px;
}

.case-output-col__label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--case-accent);
  margin-bottom: 24px;
  display: block;
}

.case-output-stat {
  margin-bottom: 24px;
}

.case-output-stat__num {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 300;
  color: var(--text);
  display: block;
  line-height: 1;
}

.case-output-stat__label {
  font-size: 0.8rem;
  color: var(--text-mid);
  margin-top: 4px;
  display: block;
}

@media (max-width: 768px) {
  .case-output-grid { grid-template-columns: 1fr; }
  .case-next__inner { flex-direction: column; align-items: flex-start; gap: 32px; }
}

/* ── Placeholder (coming soon) ───────────────────────── */
.case-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  text-align: center;
  gap: 16px;
}

.case-placeholder__icon {
  font-size: 48px;
  opacity: 0.3;
}

.case-placeholder__text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--text-mid);
}

.case-placeholder__sub {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-mid);
  opacity: 0.5;
}

/* ── Image placeholders ──────────────────────────────── */
.img-ph {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  width: 100%;
  object-fit: cover;
}

.img-ph::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 24px,
    rgba(255, 255, 255, 0.018) 24px,
    rgba(255, 255, 255, 0.018) 25px
  );
}

.img-ph__label {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-4);
  z-index: 1;
  text-align: center;
  padding: 24px;
  line-height: 1.8;
  max-width: 320px;
}

.img-ph--hero   { aspect-ratio: 21 / 9; }
.img-ph--cinema { aspect-ratio: 16 / 7; }
.img-ph--wide   { aspect-ratio: 16 / 9; }
.img-ph--square { aspect-ratio: 1; }
.img-ph--tall   { aspect-ratio: 4 / 5; }

/* Crop from the top for tall composite screenshots (avoids centering on blank space) */
img.img-ph--top { object-position: top; }

/* Hero product shot: no border */
img.img-ph--hero {
  border: none;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

/* ── Key decisions ───────────────────────────────────── */
.case-decisions {
  display: flex;
  flex-direction: column;
  margin-top: 48px;
}

.case-decision {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  align-items: start;
}

.case-decision:last-child {
  border-bottom: 1px solid var(--border);
}

.case-decision__num {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  color: var(--case-accent);
  padding-top: 5px;
}

.case-decision__title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--text);
  margin: 0 0 10px;
}

.case-decision__text {
  font-size: 0.9375rem;
  color: var(--text-mid);
  line-height: 1.75;
  margin: 0;
  max-width: 640px;
}