/* ──────────────────────────────────────────────
   SHARED SUB-PAGE STYLES  — Atlantic Ads
──────────────────────────────────────────────── */
:root {
  --cream:  #F2EAD3;
  --black:  #0A0A0A;
  --red:    #CC2200;
  --mid:    rgba(10,10,10,0.48);
  --light:  rgba(10,10,10,0.22);
  --border: rgba(10,10,10,0.12);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--cream);
  color: var(--black);
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
}

/* ── BACK LINK ─────────────────────────────── */
.back-link {
  position: fixed;
  top: 2rem; left: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mid);
  text-decoration: none;
  z-index: 900;
  transition: color 0.2s;
}
.back-link svg { width: 14px; height: 14px; }
.back-link:hover { color: var(--black); }

/* ── HERO ───────────────────────────────────── */
.sub-hero {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 8rem 8vw 5rem;
  border-bottom: 1.5px solid var(--black);
  position: relative;
}

.sub-eyebrow {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.sub-eyebrow::before {
  content: '';
  display: block;
  width: 2rem;
  height: 1.5px;
  background: var(--red);
}

.sub-h1 {
  font-family: 'DM Sans', sans-serif;
  font-size: clamp(3.5rem, 8vw, 9rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.92;
  color: var(--black);
  margin-bottom: 2.5rem;
}

.sub-lead {
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  line-height: 1.65;
  color: var(--mid);
  max-width: 620px;
  font-family: 'DM Sans', sans-serif;
}

/* ── CASE STUDY HERO VARIANT ───────────────── */
.sub-hero.case-hero {
  min-height: 70vh;
  background: var(--black);
  color: var(--cream);
  overflow: hidden;
}
.sub-hero.case-hero .sub-eyebrow { color: rgba(242,234,211,0.4); }
.sub-hero.case-hero .sub-h1 { color: var(--cream); }
.sub-hero.case-hero .sub-lead { color: rgba(242,234,211,0.6); }

.case-hero-img {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.case-hero-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.25;
}
.sub-hero.case-hero > *:not(.case-hero-img) {
  position: relative;
  z-index: 1;
}

.case-metric-row {
  display: flex;
  gap: 3rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(242,234,211,0.1);
  position: relative;
  z-index: 1;
}
.case-metric {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.case-metric-num {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(2rem, 3.5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--cream);
}
.case-metric-label {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(242,234,211,0.4);
}

/* ── BODY ───────────────────────────────────── */
.sub-body {
  max-width: 900px;
  margin: 0 auto;
  padding: 6rem 8vw;
}

.sub-intro-block {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 5rem;
  padding-bottom: 4rem;
  border-bottom: 1px solid var(--border);
}
.sub-intro-block p {
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  line-height: 1.75;
  color: var(--mid);
}

.sub-section {
  margin-bottom: 4.5rem;
}

.sub-h2 {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--black);
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1.5px solid var(--black);
}

.platform-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
@media (max-width: 640px) {
  .platform-grid { grid-template-columns: 1fr; }
}

.platform-item {
  padding: 1.5rem;
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}
.platform-item:hover { border-color: var(--black); }
.platform-name {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.7rem;
  color: var(--black);
}
.platform-item p {
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--mid);
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.check-item {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--black);
}
.check-item:last-child { border-bottom: none; }
.check-mark {
  color: var(--red);
  font-weight: 700;
  flex-shrink: 0;
}

.sub-body-para {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--mid);
  margin-bottom: 1rem;
}

/* Case study body variant */
.case-challenge,
.case-approach,
.case-result {
  margin-bottom: 3.5rem;
}

.case-quote {
  margin: 3rem 0;
  padding: 2rem 2.5rem;
  border-left: 3px solid var(--red);
  background: rgba(10,10,10,0.03);
}
.case-quote p {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.1rem, 1.6vw, 1.4rem);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: var(--black);
  margin-bottom: 0.8rem;
}
.case-quote cite {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--light);
  font-style: normal;
}

/* Tags */
.tag-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.tag {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--red);
  border: 1.5px solid rgba(204,34,0,0.25);
  padding: 0.3rem 0.7rem;
}

/* ── CTA BLOCK ──────────────────────────────── */
.sub-cta-block {
  margin-top: 5rem;
  padding-top: 4rem;
  border-top: 1.5px solid var(--black);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.sub-cta-block h3 {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.5rem, 2.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--black);
}
.cta-btn {
  display: inline-block;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cream);
  background: var(--black);
  padding: 1rem 2.2rem;
  text-decoration: none;
  transition: background 0.2s;
  white-space: nowrap;
}
.cta-btn:hover { background: var(--red); }

/* ── FOOTER ─────────────────────────────────── */
.sub-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2rem 8vw;
  border-top: 1px solid var(--border);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--light);
  font-family: 'DM Sans', sans-serif;
}
.sub-footer a {
  color: var(--mid);
  text-decoration: none;
  transition: color 0.2s;
}
.sub-footer a:hover { color: var(--black); }