/* =============================================
   ABITAB CASE STUDY
   Brand red: #C8102E  |  Navy: #1A2040
   ============================================= */

:root {
  --ab-red:         #C8102E;
  --ab-red-light:   #FDF0F1;
  --ab-red-mid:     #FAF2F2;
  --ab-navy:        #1A2040;
  --cs-text:        #1A1A1A;
  --cs-muted:       rgba(0,0,0,0.55);
  --cs-subtle:      rgba(0,0,0,0.35);
  --cs-border:      rgba(0,0,0,0.08);
}

/* ── HERO ── */
.project-hero--abitab {
  padding: 0;
  background: linear-gradient(150deg, #F5E8EA 0%, #F9EDED 30%, #F5F5F7 70%, #FAFAFA 100%);
}

.ab-hero-inner {
  padding: calc(var(--nav-h) + 88px) 0 96px;
  max-width: 760px;
}

.project-hero--abitab .project-hero-meta   { margin-bottom: 28px; }
.project-hero--abitab .project-hero-year   { color: rgba(0,0,0,0.4); border-color: rgba(0,0,0,0.12); }
.project-hero--abitab .project-hero-tags span { color: rgba(0,0,0,0.5); border-color: rgba(0,0,0,0.12); }
.project-hero--abitab .project-hero-title  { color: #1A1A1A; }
.project-hero--abitab .project-hero-subtitle { color: var(--ab-red); }
.project-hero--abitab .project-hero-desc   { color: rgba(0,0,0,0.6); }

/* ── BASE SECTIONS ── */
.cs-section {
  padding: 88px 0;
  border-top: 1px solid var(--cs-border);
  background: #FFFFFF;
}

.cs-section--alt { background: var(--ab-red-mid); }

/* ── LABELS & HEADINGS ── */
.cs-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ab-red);
  margin-bottom: 14px;
}

.cs-heading {
  font-family: var(--font-head);
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--cs-text);
  margin-bottom: 18px;
}

.cs-body {
  font-size: 16px;
  line-height: 1.75;
  color: var(--cs-muted);
  max-width: 620px;
  margin-bottom: 40px;
}

.cs-body--wide { max-width: 820px; }

/* ── OVERVIEW ── */
.cs-about-text { margin-bottom: 32px; }
.cs-about-text .cs-heading { margin-bottom: 12px; }

.cs-role-callout {
  font-size: 17px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--cs-text);
  border-left: 3px solid var(--ab-red);
  padding-left: 20px;
  margin-bottom: 36px;
  max-width: 720px;
}

.cs-cards-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: stretch;
}

.cs-problem-card {
  display: flex;
  gap: 18px;
  background: var(--ab-navy);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.cs-problem-icon { width: 36px; height: 36px; flex-shrink: 0; color: rgba(255,255,255,0.45); }
.cs-problem-icon svg { width: 36px; height: 36px; }

.cs-card-title {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.cs-card-body {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.65);
  margin-bottom: 20px;
}

.cs-meta-list {
  display: flex;
  flex-direction: column;
  gap: 7px;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 14px;
}

.cs-meta-row { display: flex; justify-content: space-between; font-size: 13px; }
.cs-meta-key { color: rgba(255,255,255,0.38); }
.cs-meta-val { color: rgba(255,255,255,0.85); font-weight: 500; }

.cs-solution-card {
  background: var(--ab-red-light);
  border-left: 3px solid var(--ab-red);
  border-radius: var(--radius-lg);
  padding: 28px 28px 28px 24px;
  display: flex;
  flex-direction: column;
}

.cs-solution-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ab-red);
  background: rgba(200,16,46,0.10);
  border: 1px solid rgba(200,16,46,0.22);
  border-radius: 100px;
  padding: 4px 12px;
  margin-bottom: 16px;
  align-self: flex-start;
}

.cs-solution-card .cs-card-body {
  color: rgba(0,0,0,0.65);
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.75;
}

/* ── DESIGN PROCESS STEPS ── */
.cs-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 3px;
  margin-top: 44px;
}

.cs-step { background: #FFFFFF; border-radius: var(--radius); padding: 28px 22px; }
.cs-step--active { background: var(--ab-red); }

.cs-step-num {
  display: block;
  font-family: var(--font-head);
  font-size: 36px;
  font-weight: 800;
  color: var(--ab-red);
  line-height: 1;
  margin-bottom: 16px;
}

.cs-step--active .cs-step-num { color: rgba(255,255,255,0.35); }

.cs-step-title {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  color: var(--cs-text);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.cs-step--active .cs-step-title { color: #FFFFFF; }
.cs-step-body { font-size: 13px; line-height: 1.65; color: var(--cs-muted); }
.cs-step--active .cs-step-body { color: rgba(255,255,255,0.75); }

/* ── PROCESS NARRATIVE ── */
.cs-narrative { max-width: 860px; }

.cs-narrative-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 48px;
  padding: 32px 0;
  border-top: 1px solid var(--cs-border);
}

.cs-narrative-row:last-child { border-bottom: 1px solid var(--cs-border); }

.cs-narrative-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ab-red);
  padding-top: 4px;
}

.cs-narrative-text { font-size: 15px; line-height: 1.80; color: var(--cs-muted); }

/* ── GALLERY ── */
.ab-gallery {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 48px;
}

.ab-gallery > img {
  width: 100%;
  border-radius: var(--radius);
  display: block;
}

.ab-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.ab-pair img {
  width: 100%;
  border-radius: var(--radius);
  display: block;
}

.ab-gallery .figma-embed {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  background: #f0f0f0;
}

.ab-gallery .figma-embed iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* ── OUTCOME ── */
.cs-outcome-quote {
  font-family: var(--font-head);
  font-size: clamp(20px, 2.8vw, 32px);
  font-weight: 700;
  color: var(--cs-text);
  line-height: 1.3;
  letter-spacing: -0.02em;
  border-left: 4px solid var(--ab-red);
  padding-left: 28px;
  margin-bottom: 32px;
  max-width: 740px;
}

/* ── HERO ENTRANCE (page load) ── */
@keyframes cs-fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.project-hero--abitab .project-hero-meta     { opacity: 0; animation: cs-fadeUp 0.65s ease forwards 0.15s; }
.project-hero--abitab .project-hero-title    { opacity: 0; animation: cs-fadeUp 0.65s ease forwards 0.30s; }
.project-hero--abitab .project-hero-subtitle { opacity: 0; animation: cs-fadeUp 0.60s ease forwards 0.44s; }
.project-hero--abitab .project-hero-desc     { opacity: 0; animation: cs-fadeUp 0.60s ease forwards 0.55s; }

/* ── SCROLL REVEAL ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.from-left  { transform: translateX(-40px); }
.reveal.from-right { transform: translateX(40px); }
.reveal.is-visible { opacity: 1 !important; transform: translate(0, 0) !important; }

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
  .cs-cards-row   { grid-template-columns: 1fr; }
  .cs-steps       { grid-template-columns: 1fr 1fr; }
  .cs-narrative-row { grid-template-columns: 1fr; gap: 8px; }
  .ab-pair        { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .cs-section     { padding: 60px 0; }
  .cs-steps       { grid-template-columns: 1fr; }
  .ab-hero-inner  { padding-bottom: 64px; }
}