/* ============================================================
   CASE-STUDY.CSS — work/[slug]/index.html specific styles
   ============================================================ */

/* ── HERO ────────────────────────────────────────────────── */
.cs-hero {
  min-height: 82vh;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 120px var(--page-pad) 64px;
  background:
    radial-gradient(ellipse 60% 70% at 10% 20%, #cee3f5 0%, transparent 65%),
    radial-gradient(ellipse 55% 65% at 90% 80%, #f5e8d3 0%, transparent 65%),
    var(--bg);
  position: relative;
}
.cs-hero.cs-hero-split {
  flex-direction: row;
  align-items: flex-end;
  justify-content: space-between;
  gap: 56px;
}
.cs-hero-split .cs-hero-content {
  flex: 1 1 0;
  min-width: 0;
  max-width: 680px;
}
.cs-hero-split .cs-hero-media {
  flex: 0 1 520px;
  width: min(42vw, 520px);
  min-width: 300px;
  align-self: stretch;
  display: flex;
  align-items: flex-end;
  opacity: 0;
  animation: fadeUp 0.9s 0.5s ease forwards;
}
.cs-hero-split .cs-hero-media .img-frame {
  width: 100%;
  height: clamp(300px, 40vw, 540px);
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cs-hero-split .cs-hero-media .img-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}
.cs-hero-split .cs-hero-media .img-banner-wrap {
  width: 100%;
  height: clamp(300px, 40vw, 540px);
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cs-hero-split .cs-hero-media .img-banner {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}
.cs-hero .tag {
  margin-bottom: 28px;
  opacity: 0; animation: fadeUp 0.7s 0.1s ease forwards;
}
.cs-hero h1 {
  font-size: clamp(38px, 5.5vw, 80px);
  font-weight: 800; letter-spacing: -0.035em;
  line-height: 1.02; max-width: 900px;
  opacity: 0; animation: fadeUp 0.8s 0.2s ease forwards;
}
.cs-hero h1 em {
  font-family: var(--serif); font-style: italic; font-weight: 400;
}
.cs-hero-sub {
  margin-top: 22px; max-width: 560px;
  opacity: 0; animation: fadeUp 0.8s 0.35s ease forwards;
}
.cs-hero-chips {
  margin-top: 44px; display: flex; flex-wrap: wrap; gap: 10px;
  opacity: 0; animation: fadeUp 0.8s 0.45s ease forwards;
}
.cs-scroll-hint {
  position: absolute; bottom: 36px; right: var(--page-pad);
  display: flex; align-items: center; gap: 10px;
  font-size: 11px; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--ink-soft);
  opacity: 0; animation: fadeUp 0.8s 0.6s ease forwards;
}
.cs-scroll-hint::before {
  content: ""; width: 28px; height: 1px; background: var(--ink-soft);
}

/* ── HERO IMAGE ──────────────────────────────────────────── */
.cs-hero-img {
  padding: 0 var(--page-pad) 80px;
  opacity: 0; animation: fadeUp 0.9s 0.55s ease forwards;
}
.cs-hero-img .img-frame {
  width: 100%; height: clamp(280px, 48vw, 620px);
  background: linear-gradient(135deg, #dbe9f8 0%, #f0e9df 100%);
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid rgba(255,255,255,0.8);
  box-shadow: var(--shadow-md);
  display: flex; align-items: center; justify-content: center;
}
.cs-hero-img .img-frame img { width: 100%; height: 100%; object-fit: cover; }
.img-placeholder {
  font-family: var(--serif); font-style: italic; color: var(--ink-soft); font-size: 18px;
}

/* ── IN-PAGE SECTION NAV ─────────────────────────────────── */
.cs-section-nav {
  position: sticky;
  top: 65px;
  z-index: 50;
  background: rgba(250,249,247,0.90);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0 var(--page-pad);
}
.cs-section-nav::-webkit-scrollbar { display: none; }
.cs-section-nav a {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink-soft);
  padding: 14px 18px;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.cs-section-nav a:hover { color: var(--ink); }
.cs-section-nav a.active {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ── INFO GRID ───────────────────────────────────────────── */
.info-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0; padding: 48px 0;
  border-bottom: 1px solid var(--border);
}
.info-cell { padding: 0 28px; border-right: 1px solid var(--border); }
.info-cell:first-child { padding-left: 0; }
.info-cell:last-child  { border-right: none; }

/* ── SECTION HEADER ──────────────────────────────────────── */
.cs-eyebrow { margin-bottom: 20px; }
.cs-eyebrow .num {
  font-family: var(--serif); font-style: italic;
  font-size: 12px; color: var(--ink-soft); margin-right: 6px;
}
.cs-title {
  font-size: clamp(26px, 3.2vw, 44px);
  font-weight: 800; letter-spacing: -0.03em;
  line-height: 1.1; margin-bottom: 28px;
}
.cs-title em {
  font-family: var(--serif); font-style: italic; font-weight: 400;
}

/* ── TWO COL ─────────────────────────────────────────────── */
.two-col       { display: grid; grid-template-columns: 1fr 1fr;       gap: 60px; align-items: start; }
.two-col-wide  { display: grid; grid-template-columns: 3fr 2fr;       gap: 60px; align-items: start; }

/* ── PROCESS STEPS ───────────────────────────────────────── */
.process-list  { margin-top: 36px; }
.process-step  {
  display: flex; gap: 24px; align-items: flex-start;
  padding: 28px 0; border-bottom: 1px solid var(--border);
}
.process-step:last-child { border-bottom: none; }
.step-num {
  font-family: var(--serif); font-style: italic;
  font-size: 32px; color: var(--ink-soft);
  min-width: 36px; line-height: 1; padding-top: 2px;
}
.step-body h4  { font-size: 17px; font-weight: 700; letter-spacing: -0.01em; margin-bottom: 8px; }
.step-body p   { font-size: 14.5px; color: var(--ink-mid); line-height: 1.7; }

/* ── FEATURE CARDS ───────────────────────────────────────── */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 36px; }
.feature-card {
  background: white; border: 1px solid var(--border);
  border-radius: 16px; padding: 28px 24px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.feature-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, #cee3f5, #f5e8d3);
  margin-bottom: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.feature-card h4  { font-size: 15px; font-weight: 700; letter-spacing: -0.01em; margin-bottom: 8px; }
.feature-card p   { font-size: 13.5px; color: var(--ink-mid); line-height: 1.6; }

/* ── INSIGHT CARDS ───────────────────────────────────────── */
.insight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 36px; }
.insight-card {
  border: 1px solid var(--border); border-radius: 16px;
  padding: 28px 24px; background: var(--bg-warm);
  position: relative; overflow: hidden;
}
.insight-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, #9ec9e8, #e8c9a0);
}
.insight-card h4 {
  font-size: 11px; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ink-soft); margin-bottom: 10px;
}
.insight-card p  { font-size: 15px; line-height: 1.65; }

/* ── REFLECTION LIST ─────────────────────────────────────── */
.reflection-list { margin-top: 28px; }
.reflection-list li {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 18px 0; border-bottom: 1px solid var(--border);
  font-size: 15px; color: var(--ink-mid); line-height: 1.65;
}
.reflection-list li::before {
  content: "→"; color: var(--ink-soft); font-size: 14px;
  padding-top: 1px; flex-shrink: 0;
}

/* ── OUTCOME STRIP ───────────────────────────────────────── */
.outcome-strip {
  background: var(--ink); color: white;
  border-radius: 24px; padding: 56px 60px;
  margin: 64px 0;
  display: flex; gap: 60px; align-items: center;
}
.outcome-strip h2 {
  font-size: clamp(24px, 2.8vw, 36px);
  font-weight: 800; letter-spacing: -0.03em; flex: 1;
}
.outcome-strip h2 em { font-family: var(--serif); font-style: italic; font-weight: 400; }
.outcome-strip .outcome-body { flex: 1.4; }
.outcome-strip p  { font-size: 15px; line-height: 1.75; color: rgba(255,255,255,0.7); }
.outcome-link {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 20px; background: white; color: var(--ink);
  border-radius: var(--radius-full); padding: 11px 22px;
  font-size: 13.5px; font-weight: 700; transition: opacity 0.2s;
}
.outcome-link::after { content: "↗"; font-size: 11px; }
.outcome-link:hover  { opacity: 0.85; }

/* ── SCREENSHOT PAIR ─────────────────────────────────────── */
.screenshot-pair {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 28px;
}
.screenshot-frame {
  height: 320px;
  border-radius: 16px; border: 1px solid var(--border);
  overflow: hidden; background: linear-gradient(135deg, #d4e9f8, #eee);
  display: flex; align-items: center; justify-content: center;
  padding: 12px;
}
.screenshot-frame img { width: 100%; height: 100%; object-fit: contain; }
.screenshot-frame--duo {
  gap: 10px;
}
.screenshot-frame.screenshot-frame--duo img {
  width: 50%; height: 100%; flex-shrink: 0; object-fit: contain;
}

/* ── LIGHTBOX ────────────────────────────────────────────── */
.lightbox-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,0.88);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease;
  cursor: zoom-out;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.lightbox-overlay.open { opacity: 1; pointer-events: auto; }
.lightbox-overlay img {
  max-width: 92vw; max-height: 90vh; object-fit: contain;
  border-radius: 12px; box-shadow: 0 32px 80px rgba(0,0,0,0.5);
  transform: scale(0.95); transition: transform 0.25s ease;
  cursor: default;
}
.lightbox-overlay.open img { transform: scale(1); }
.lightbox-close {
  position: absolute; top: 20px; right: 20px;
  background: rgba(255,255,255,0.12); border: none; color: white;
  width: 40px; height: 40px; border-radius: 50%; font-size: 17px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: background 0.2s;
}
.lightbox-close:hover { background: rgba(255,255,255,0.25); }

/* ── EXPANDABLE IMAGE WRAPPER ────────────────────────────── */
.img-expand-wrap {
  border-radius: 16px; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.img-expand-wrap img {
  max-width: 100%; max-height: 100%; object-fit: contain;
  cursor: zoom-in; transition: opacity 0.2s;
}
.img-expand-wrap img:hover { opacity: 0.88; }
.img-expand-wrap::after {
  content: "⤢"; position: absolute; bottom: 10px; right: 12px;
  font-size: 14px; color: rgba(255,255,255,0.7);
  background: rgba(0,0,0,0.35); border-radius: 6px;
  padding: 3px 6px; pointer-events: none;
  opacity: 0; transition: opacity 0.2s;
}
.img-expand-wrap:hover::after { opacity: 1; }

/* ── FEATURE SHOWCASE ────────────────────────────────────── */
.feature-showcase {
  display: flex; gap: 64px; align-items: center;
  padding: 52px 0; border-bottom: 1px solid var(--border);
}
.feature-showcase:last-child { border-bottom: none; }
.feature-showcase-text { flex: 1; }
.feature-showcase-text .feature-icon { margin-bottom: 20px; }
.feature-showcase-text h4 { font-size: 19px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 12px; }
.feature-showcase-text p  { font-size: 15px; color: var(--ink-mid); line-height: 1.7; }
.feature-showcase-screens {
  flex: 1; display: flex; gap: 12px; justify-content: center; align-items: center;
  background: linear-gradient(135deg, #ead4f5 0%, #d4edf5 100%);
  border-radius: 20px; padding: 32px 24px; min-height: 320px;
}
.feature-showcase-screens img {
  max-height: 380px; width: auto; border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.15);
  flex-shrink: 0;
}

/* ── RESPONSIVE: CASE STUDY ──────────────────────────────── */
@media (max-width: 900px) {
  .cs-hero.cs-hero-split {
    flex-direction: column;
    justify-content: flex-end;
    align-items: stretch;
    gap: 28px;
  }
  .cs-hero-split .cs-hero-content {
    max-width: none;
  }
  .cs-hero-split .cs-hero-media {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    align-self: auto;
  }
  .cs-hero-split .cs-scroll-hint {
    display: none;
  }
  .info-grid { grid-template-columns: 1fr 1fr; }
  .info-cell { padding: 16px 0; border-right: none; border-bottom: 1px solid var(--border); }
  .info-cell:last-child { border-bottom: none; }
  .two-col, .two-col-wide { grid-template-columns: 1fr; gap: 32px; }
  .feature-grid   { grid-template-columns: 1fr; }
  .insight-grid   { grid-template-columns: 1fr; }
  .screenshot-pair { grid-template-columns: 1fr; }
  .outcome-strip  { flex-direction: column; gap: 24px; padding: 36px 28px; }
  .feature-showcase { flex-direction: column; gap: 32px; }
  .feature-showcase-screens { width: 100%; }
  .feature-showcase-screens img { max-height: 280px; }
}
@media (max-width: 640px) {
  .cs-hero { padding: 110px var(--page-pad) 48px; min-height: auto; }
  .cs-hero.cs-hero-split { padding: 110px var(--page-pad) 48px; }
  .cs-hero-chips { margin-top: 28px; gap: 8px; }
  .callout { padding: 24px 20px; }
  .outcome-strip { padding: 28px 20px; margin: 40px 0; }
  .feature-showcase-screens img { max-height: 220px; }
  .process-step { gap: 16px; }
}
@media (max-width: 480px) {
  .info-grid { grid-template-columns: 1fr; }
  .info-cell { padding: 14px 0; border-bottom: 1px solid var(--border); }
  .info-cell:last-child { border-bottom: none; }
  .screenshot-frame { height: 220px; }
  .feature-showcase-screens { min-height: 200px; padding: 20px 16px; }
}