/* ==========================================================================
   CASE STUDY + PORTFOLIO SCREENS
   Loaded only on case study / portfolio singles and archives
   (see az_cs_enqueue() in inc/case-study.php). Uses the design tokens from
   style.css (--navy, --accent, --bg-soft, --border, --font-display ...).
   Prefix: .cs-  (infographics, layout)   .az-pf-  (portfolio grid)
   ========================================================================== */

.cs-page{ display:block; }
.cs-page h1, .cs-page h2, .cs-page h3, .cs-page h4{ text-wrap:balance; }

/* ---------- Reading progress ---------- */
.cs-progress{ position:fixed; top:0; left:0; right:0; height:3px; z-index:1000; pointer-events:none; }
.cs-progress span{ display:block; height:100%; background:var(--accent); transform:scaleX(0); transform-origin:0 50%; }

/* ==========================================================================
   HERO
   ========================================================================== */
.cs-hero{ position:relative; background:var(--navy); color:#fff; padding:44px 0 0; overflow:hidden; }
.cs-hero::before{
  content:''; position:absolute; inset:0; pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:linear-gradient(180deg, #000 0%, transparent 88%); mask-image:linear-gradient(180deg, #000 0%, transparent 88%);
}
.cs-hero > *{ position:relative; }
.cs-hero-grid{ display:grid; grid-template-columns:minmax(0,1.02fr) minmax(0,1fr); gap:56px; align-items:center; padding-bottom:52px; }
.cs-hero h1{ color:#fff; font-size:clamp(32px, 4.4vw, 54px); line-height:1.05; letter-spacing:-0.03em; margin:0 0 20px; }
.cs-lead{ color:rgba(255,255,255,.76); font-size:18px; line-height:1.65; max-width:58ch; margin:0 0 30px; }
.cs-eyebrow{ font-size:12.5px; font-weight:700; letter-spacing:.12em; text-transform:uppercase; color:var(--accent-light); margin:0 0 18px; }
.cs-kicker{ font-size:12.5px; font-weight:700; letter-spacing:.12em; text-transform:uppercase; color:var(--accent); margin:0 0 10px; }

.cs-crumbs ol{ display:flex; flex-wrap:wrap; gap:8px; margin:0 0 30px; padding:0; list-style:none; font-size:13px; color:rgba(255,255,255,.62); }
.cs-crumbs li + li::before{ content:'/'; margin-right:8px; opacity:.5; }
.cs-crumbs a{ color:rgba(255,255,255,.88); text-decoration:underline; text-decoration-color:rgba(255,255,255,.25); text-underline-offset:3px; }
.cs-crumbs a:hover{ text-decoration-color:var(--accent-light); }

.cs-hero-ctas{ display:flex; flex-wrap:wrap; gap:12px; }
.cs-hero .btn:hover{ background:#fff; color:var(--navy); }
.cs-hero .cs-btn-ghost{ background:transparent; color:#fff; border:2px solid rgba(255,255,255,.3); }
.cs-hero .cs-btn-ghost:hover{ background:#fff; color:var(--navy); border-color:#fff; }
.cs-hero a:focus-visible, .cs-hero .btn:focus-visible{ outline-color:#fff; }

.cs-hero-archive{ padding:44px 0 64px; }
.cs-hero-archive .cs-crumbs ol{ margin-bottom:26px; }
.cs-hero-archive h1{ max-width:20ch; }

/* ---------- Facts strip ---------- */
.cs-facts{ display:grid; grid-template-columns:repeat(auto-fit, minmax(170px, 1fr)); margin:0; border-top:1px solid rgba(255,255,255,.14); }
.cs-fact{ padding:22px 20px 26px 0; }
.cs-fact + .cs-fact{ padding-left:20px; border-left:1px solid rgba(255,255,255,.1); }
.cs-fact dt{ font-size:11.5px; font-weight:700; letter-spacing:.12em; text-transform:uppercase; color:rgba(255,255,255,.58); margin:0 0 6px; }
.cs-fact dd{ margin:0; font-weight:600; font-size:15.5px; color:#fff; line-height:1.4; }
.cs-fact dd a{ color:#fff; text-decoration:underline; text-decoration-color:var(--accent-light); text-underline-offset:4px; }

/* ---------- Browser mockup (subtle 3D, pointer devices only) ---------- */
.cs-hero-visual{ perspective:1400px; --rx:0deg; --ry:0deg; }
.cs-browser{
  position:relative; margin:0; border-radius:10px; overflow:hidden; background:#fff;
  box-shadow:0 40px 80px rgba(0,0,0,.45), 0 0 0 1px rgba(255,255,255,.08);
  transform:rotateX(var(--rx)) rotateY(var(--ry)); transform-style:preserve-3d;
  transition:transform .5s var(--ease);
}
.cs-browser-bar{ display:flex; align-items:center; gap:14px; padding:10px 14px; background:#1b222e; }
.cs-dots i{ display:inline-block; width:9px; height:9px; border-radius:50%; background:rgba(255,255,255,.28); margin-right:6px; }
.cs-browser-url{ flex:1; max-width:280px; font-size:12px; color:rgba(255,255,255,.72); background:rgba(255,255,255,.08); padding:3px 12px; border-radius:5px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.cs-browser-screen{ aspect-ratio:16 / 10; background:var(--bg-soft); overflow:hidden; }
.cs-browser-screen .cs-shot{ width:100%; height:100%; object-fit:cover; object-position:top; display:block; }
.cs-browser-cap{ font-size:11.5px; text-align:center; color:rgba(255,255,255,.6); background:#1b222e; padding:6px 14px; }
.cs-phone{ position:absolute; right:16px; bottom:16px; width:22%; min-width:84px; border:5px solid #1b222e; border-radius:16px; overflow:hidden; background:#fff; box-shadow:0 18px 40px rgba(0,0,0,.4); transform:translateZ(40px); }
.cs-phone .cs-shot{ width:100%; height:auto; display:block; }
.cs-wire{ width:100%; height:100%; display:block; }
.w-bg{ fill:#f3f1ec; } .w-ink{ fill:#0d1117; } .w-line{ fill:#cfc9bc; } .w-accent{ fill:#c03f27; } .w-block{ fill:#e6e2d9; } .w-card{ fill:#fff; stroke:#e6e2d9; }
.w-trend{ stroke:#c03f27; stroke-width:5; stroke-linecap:round; stroke-linejoin:round; }
@media (pointer:coarse){ .cs-browser{ transform:none; } }

/* ---------- Sticky sub-navigation ---------- */
.cs-subnav{ position:sticky; top:var(--az-header-h, 68px); z-index:800; background:rgba(251,250,248,.95); -webkit-backdrop-filter:blur(8px); backdrop-filter:blur(8px); border-bottom:1px solid var(--border); }
.cs-subnav ul{ display:flex; gap:6px; margin:0; padding:10px 0; overflow-x:auto; scrollbar-width:none; list-style:none; }
.cs-subnav ul::-webkit-scrollbar{ display:none; }
.cs-subnav a{ display:block; padding:7px 15px; border-radius:100px; font-size:13.5px; font-weight:600; color:var(--text-muted); white-space:nowrap; transition:background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease); }
.cs-subnav a:hover{ color:var(--navy); background:var(--bg-soft); }
.cs-subnav a[aria-current="true"]{ background:var(--navy); color:#fff; }

/* ==========================================================================
   SECTIONS
   ========================================================================== */
.cs-section{ padding:96px 0; }
.cs-section-soft{ background:var(--bg-soft); }
.cs-section-tight{ padding:40px 0 0; }
.cs-section-dark{ background:var(--navy); color:#fff; }
.cs-section-dark .cs-sec-title, .cs-section-dark h3{ color:#fff; }
.cs-section-dark p{ color:rgba(255,255,255,.74); }
.cs-section-dark .cs-kicker{ color:var(--accent-light); }
.cs-section-dark .cs-num{ color:rgba(255,255,255,.12); }

.cs-sec-head{ position:relative; max-width:760px; margin:0 0 52px; }
.cs-num{ position:absolute; right:calc(100% + 18px); top:-6px; font-family:var(--font-display); font-size:64px; font-weight:800; line-height:1; letter-spacing:-0.04em; color:var(--border); }
.cs-sec-title{ font-size:clamp(26px, 3.4vw, 40px); margin:0 0 12px; }
.cs-sec-sub{ font-size:17px; margin:0; max-width:62ch; }
@media (max-width:1500px){ .cs-num{ position:static; display:block; font-size:44px; margin-bottom:10px; } }

.cs-prose{ max-width:72ch; font-size:17px; line-height:1.8; }
.cs-prose h2{ font-size:28px; margin-top:1.4em; } .cs-prose h3{ font-size:22px; margin-top:1.2em; }
.cs-overview{ display:grid; grid-template-columns:minmax(0,.8fr) minmax(0,1.4fr); gap:56px; align-items:start; }
.cs-overview .cs-sec-title{ margin:0; }

/* ---------- Story rail ---------- */
.cs-rail{ display:grid; grid-template-columns:repeat(auto-fit, minmax(260px, 1fr)); gap:36px; margin:0; padding:0; list-style:none; position:relative; counter-reset:none; }
.cs-rail::before{ content:''; position:absolute; left:0; right:0; top:19px; height:2px; background:var(--border); }
.cs-rail::after{ content:''; position:absolute; left:0; right:0; top:19px; height:2px; background:var(--accent); transform-origin:0 50%; transform:scaleX(1); }
.cs-js .cs-rail:not(.is-in)::after{ transform:scaleX(0); }
.cs-rail.is-in::after{ transition:transform 1.1s var(--ease); }
.cs-rail-item{ position:relative; padding-top:56px; }
.cs-rail-n{ position:absolute; top:0; left:0; display:grid; place-items:center; width:40px; height:40px; border-radius:50%; background:var(--navy); color:#fff; font-family:var(--font-display); font-weight:700; font-size:14px; box-shadow:0 0 0 6px var(--bg); }
.cs-rail-item h3{ font-size:22px; margin:0 0 10px; }
.cs-rail-item p{ font-size:16px; line-height:1.75; }

/* ---------- Cards (scope / highlights) ---------- */
.cs-cards{ display:grid; gap:20px; margin:0; padding:0; list-style:none; }
.cs-cards-2{ grid-template-columns:repeat(2, 1fr); }
.cs-cards-3{ grid-template-columns:repeat(3, 1fr); }
.cs-cards-4{ grid-template-columns:repeat(4, 1fr); }
.cs-card{ background:#fff; border:1px solid var(--border); border-radius:10px; padding:28px; transition:transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease); }
.cs-card:hover{ transform:translateY(-3px); box-shadow:var(--shadow); border-color:#d6d0c3; }
.cs-card h3{ font-size:19px; margin:16px 0 8px; }
.cs-card p{ font-size:15px; margin:0; }
.cs-card-ico{ display:inline-grid; place-items:center; width:44px; height:44px; border-radius:8px; background:var(--navy); color:#fff; flex:none; }
.cs-card-ico .az-icon{ display:grid; place-items:center; }
.cs-card-ico svg{ width:22px; height:22px; }

/* ---------- Infographic: search journey ---------- */
.cs-block{ margin:0 0 72px; }
.cs-block-title{ font-size:13px; font-weight:700; letter-spacing:.12em; text-transform:uppercase; color:var(--text-muted); margin:0 0 28px; font-family:var(--font); }
.cs-flow{ display:grid; grid-template-columns:repeat(auto-fit, minmax(210px, 1fr)); gap:28px; margin:0; padding:0; list-style:none; position:relative; }
.cs-flow-step{ position:relative; padding-top:76px; }
.cs-flow-step::before{ content:''; position:absolute; top:27px; left:56px; right:-28px; height:2px; background:repeating-linear-gradient(90deg, var(--border) 0 6px, transparent 6px 12px); }
.cs-flow-step:last-child::before{ display:none; }
.cs-flow-node{ position:absolute; top:0; left:0; display:grid; place-items:center; width:56px; height:56px; border-radius:50%; background:#fff; border:2px solid var(--navy); color:var(--navy); font-weight:700; transition:background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease); }
.cs-flow-node svg{ width:24px; height:24px; }
.cs-flow-step:last-child .cs-flow-node{ background:var(--accent); border-color:var(--accent); color:#fff; }
.cs-flow-step h4{ font-size:18px; margin:0 0 8px; }
.cs-flow-step p{ font-size:15px; margin:0; }
.cs-js .cs-flow:not(.is-in) .cs-flow-node{ background:var(--bg); color:#b8b3a6; border-color:var(--border); }
.cs-flow.is-in .cs-flow-node{ transition-delay:calc(var(--i, 0) * .22s); }
.cs-js .cs-flow:not(.is-in) .cs-flow-step::before{ opacity:0; }
.cs-flow.is-in .cs-flow-step::before{ opacity:1; transition:opacity .5s ease calc(var(--i, 0) * .22s + .2s); }

/* ---------- Infographic: radial coverage map ---------- */
.cs-map-list{ display:none; }
.cs-map-list-h{ font-size:12px; font-weight:700; letter-spacing:.12em; text-transform:uppercase; color:var(--text-muted); margin:0 0 10px; }
.cs-map-list .cs-chips{ display:flex; flex-wrap:wrap; gap:8px; margin:0 0 22px; padding:0; list-style:none; }
.cs-map-list .cs-chip{ background:#fff; border:1px solid var(--navy); border-radius:6px; padding:6px 12px; font-size:14px; font-weight:600; color:var(--navy); }
.cs-map-list .cs-map-list-h + .cs-chips + .cs-map-list-h + .cs-chips .cs-chip{ background:var(--accent); border-color:var(--accent); color:#fff; }
.cs-split{ display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap:56px; align-items:center; }
.cs-split-even{ align-items:start; }
.cs-map{ margin:0; }
.cs-map figcaption{ font-size:13px; color:var(--text-muted); text-align:center; margin-top:10px; }
.cs-map-svg{ width:100%; height:auto; display:block; max-width:560px; margin:0 auto; overflow:visible; }
.cs-orbit{ fill:none; stroke:var(--border); stroke-width:1.5; stroke-dasharray:3 7; }
.cs-orbit-2{ stroke:#d6d0c3; }
.cs-spoke{ fill:none; stroke:#b8b3a6; stroke-width:1.5; stroke-dasharray:1; stroke-dashoffset:0; }
.cs-core{ fill:var(--navy); }
.cs-core-t{ fill:#fff; font-family:var(--font-display); font-weight:700; font-size:15px; }
.cs-node rect{ fill:#fff; stroke:var(--navy); stroke-width:1.5; }
.cs-node text{ fill:var(--navy); font-family:var(--font); font-weight:600; font-size:13px; }
.cs-place rect{ fill:var(--accent); }
.cs-place text{ fill:#fff; font-family:var(--font); font-weight:700; font-size:13px; }
.cs-node, .cs-place{ transform-box:fill-box; transform-origin:center; }
.cs-js .cs-map:not(.is-in) .cs-spoke{ stroke-dashoffset:1; }
.cs-js .cs-map:not(.is-in) .cs-node, .cs-js .cs-map:not(.is-in) .cs-place{ opacity:0; transform:scale(.85); }
.cs-map.is-in .cs-spoke{ transition:stroke-dashoffset .9s var(--ease); }
.cs-map.is-in .cs-node, .cs-map.is-in .cs-place{ transition:opacity .5s ease calc(var(--i, 0) * .09s + .5s), transform .5s var(--ease) calc(var(--i, 0) * .09s + .5s); }

.cs-pillars{ display:grid; gap:14px; margin:0; padding:0; list-style:none; }
.cs-pillar{ display:flex; gap:18px; align-items:flex-start; padding:22px; background:#fff; border:1px solid var(--border); border-radius:10px; }
.cs-pillar h3{ font-size:17px; margin:2px 0 6px; }
.cs-pillar p{ font-size:14.5px; margin:0; }

/* ---------- Infographic: search preview + evidence checklist ---------- */
.cs-serp{ margin:0; }
.cs-serp-cap{ font-size:12px; font-weight:700; letter-spacing:.12em; text-transform:uppercase; color:rgba(255,255,255,.62); margin-bottom:14px; }
.cs-serp-card{ background:#fff; border-radius:10px; padding:26px 28px; box-shadow:0 24px 50px rgba(0,0,0,.35); }
.cs-serp-card p{ margin:0; }
.cs-serp-url{ font-family:Arial, Helvetica, sans-serif; font-size:13.5px; color:#3c4043 !important; margin-bottom:4px !important; word-break:break-word; }
.cs-serp-title{ font-family:Arial, Helvetica, sans-serif; font-size:20px; line-height:1.3; color:#1a0dab !important; margin-bottom:6px !important; }
.cs-serp-desc{ font-family:Arial, Helvetica, sans-serif; font-size:14px; line-height:1.58; color:#4d5156 !important; }
.cs-serp-note{ font-size:12.5px; color:rgba(255,255,255,.58) !important; margin:12px 0 0; }
.cs-checks{ display:grid; gap:12px; margin:0; padding:0; list-style:none; }
.cs-check{ display:flex; gap:16px; align-items:flex-start; padding:18px 20px; border:1px solid rgba(255,255,255,.14); border-radius:10px; background:rgba(255,255,255,.04); }
.cs-check h3{ font-size:16.5px; margin:0 0 4px; }
.cs-check p{ font-size:14.5px; margin:0; }
.cs-tick{ display:grid; place-items:center; flex:none; width:28px; height:28px; border-radius:50%; background:var(--accent); color:#fff; margin-top:2px; }
.cs-tick svg{ width:16px; height:16px; }

/* ---------- Results: metrics + chart ---------- */
.cs-metrics{ display:grid; gap:20px; margin:0 0 40px; padding:0; list-style:none; }
.cs-metrics-1{ grid-template-columns:1fr; } .cs-metrics-2{ grid-template-columns:repeat(2, 1fr); } .cs-metrics-3{ grid-template-columns:repeat(3, 1fr); }
.cs-metric{ background:#fff; border:1px solid var(--border); border-radius:10px; padding:30px; }
.cs-metric b{ display:block; font-family:var(--font-display); font-size:clamp(38px, 5vw, 58px); line-height:1; letter-spacing:-0.03em; color:var(--accent); margin-bottom:10px; font-variant-numeric:tabular-nums; }
.cs-metric span{ color:var(--text-muted); font-size:15px; }
.cs-chart{ margin:0; background:#fff; border:1px solid var(--border); border-radius:10px; padding:30px; }
.cs-chart-title{ font-family:var(--font-display); font-weight:700; font-size:20px; margin-bottom:22px; }
.cs-chart-rows{ margin:0; padding:0; list-style:none; display:grid; gap:26px; }
.cs-chart-label{ display:block; font-weight:600; margin-bottom:10px; }
.cs-bar{ display:grid; grid-template-columns:56px 1fr auto; gap:12px; align-items:center; margin-bottom:8px; }
.cs-bar-name{ font-size:12.5px; color:var(--text-muted); }
.cs-bar-track{ display:block; height:14px; background:var(--bg-soft); border-radius:3px; overflow:hidden; }
.cs-bar-fill{ display:block; height:100%; width:var(--w); background:#b8b3a6; border-radius:3px; transform-origin:0 50%; }
.cs-bar-after .cs-bar-fill{ background:var(--accent); }
.cs-bar-val{ font-size:14px; font-variant-numeric:tabular-nums; min-width:80px; text-align:right; }
.cs-js .cs-chart:not(.is-in) .cs-bar-fill{ transform:scaleX(0); }
.cs-chart.is-in .cs-bar-fill{ transition:transform 1s var(--ease); }
.cs-chart-source{ font-size:13px; margin:18px 0 0; }

.cs-hint{ border:1px dashed #c9c3b5; background:var(--bg-soft); border-radius:8px; padding:16px 20px; font-size:14px; max-width:760px; margin:0; }

/* ---------- Linked item card + CTA ---------- */
.cs-link-card{ display:flex; flex-wrap:wrap; align-items:center; gap:10px 22px; padding:26px 30px; border:1px solid var(--border); border-radius:10px; background:#fff; transition:border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease); }
.cs-link-card:hover{ border-color:var(--navy); box-shadow:var(--shadow); }
.cs-link-card .cs-kicker{ margin:0; width:100%; }
.cs-link-card strong{ font-family:var(--font-display); font-size:22px; flex:1 1 260px; }
.cs-cta{ margin-top:96px; }
.cs-section-tight + .cs-cta{ margin-top:72px; }

/* ==========================================================================
   ARCHIVES
   ========================================================================== */
.cs-archive{ padding-top:64px; padding-bottom:72px; }
.az-pf-grid{ display:grid; grid-template-columns:repeat(auto-fill, minmax(300px, 340px)); gap:28px; justify-content:center; }
.cs-archive .case-card{ margin-bottom:28px; }
.cs-archive .filter-bar{ justify-content:flex-start; }
.filter-btn:hover{ border-color:var(--navy); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width:960px){
  .cs-hero-grid{ grid-template-columns:1fr; gap:40px; }
  .cs-section{ padding:68px 0; }
  .cs-cards-3, .cs-cards-4{ grid-template-columns:repeat(2, 1fr); }
  .cs-split, .cs-overview{ grid-template-columns:1fr; gap:36px; }
  .cs-metrics-3{ grid-template-columns:1fr; }
  .cs-rail::before, .cs-rail::after{ display:none; }
}
@media (max-width:640px){
  .cs-map-svg, .cs-map figcaption{ display:none; }
  .cs-map-list{ display:block; }
  .cs-hero{ padding-top:28px; }
  .cs-lead{ font-size:16.5px; }
  .cs-cards-2, .cs-cards-3, .cs-cards-4, .cs-metrics-2{ grid-template-columns:1fr; }
  .cs-fact + .cs-fact{ border-left:0; padding-left:0; }
  .cs-fact{ padding-right:12px; }
  .cs-flow-step::before{ display:none; }
  .cs-serp-card{ padding:20px; }
  .cs-bar{ grid-template-columns:48px 1fr; } .cs-bar-val{ grid-column:2; text-align:left; }
  .cs-phone{ right:10px; bottom:10px; }
  .az-pf-grid{ grid-template-columns:1fr; }
}

/* ==========================================================================
   REDUCED MOTION: no transitions, no tilt; infographics shown in final state
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  .cs-browser{ transform:none !important; transition:none; }
  .cs-card, .cs-link-card, .cs-subnav a{ transition:none; }
  .cs-card:hover{ transform:none; }
  .cs-rail::after, .cs-spoke, .cs-node, .cs-place, .cs-bar-fill, .cs-flow-node, .cs-flow-step::before{ transition:none !important; }
}