/* ══════════════════════════════════════════════════════
   CASE STUDIES REDESIGN — shared styles for the overview
   page and all individual case-study detail pages.
   Built in the site's existing vanilla CSS system —
   no framework, uses the same CSS custom properties
   (--sage, --ink, --card, --border etc.) as everywhere else.
   ══════════════════════════════════════════════════════ */

/* ── Hero (overview + detail pages) — light, theme-aware, matches the
   site's existing .page-hero pattern instead of a hardcoded dark bg ── */
.cs-hero-dark{position:relative;overflow:hidden;padding:100px 0 48px;border-bottom:1px solid var(--border)}
.cs-hero-dark::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,var(--blush-pal) 0,var(--sage-pal) 60%,transparent 100%);opacity:.7;pointer-events:none}
.cs-hero-dark .breadcrumb a,.cs-hero-dark .breadcrumb span{color:var(--muted)}
.cs-hero-dark .breadcrumb a:hover{color:var(--sage)}
.cs-hero-back{display:inline-flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;text-decoration:none;margin-bottom:22px;transition:color .2s}
.cs-hero-back:hover{color:var(--sage)}
.cs-hero-tag{display:inline-flex;align-items:center;gap:7px;font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--sage);background:var(--sage-pal);border:1px solid var(--border2);padding:6px 14px;border-radius:50px;margin-bottom:18px}
.cs-hero-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:2.5rem;align-items:center;position:relative;z-index:1}
.cs-hero-dark h1{font-family:var(--disp);font-size:clamp(2rem,3.6vw,2.9rem);line-height:1.12;color:var(--ink);margin-bottom:14px}
.cs-hero-dark h1 .sage{color:var(--sage)}
.cs-hero-dark p{color:var(--muted);font-size:.98rem;line-height:1.7;max-width:520px}

/* KPI stat row (used in overview hero) */
.cs-kpi-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:2rem;position:relative;z-index:1}
.cs-kpi-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px 14px;text-align:center;box-shadow:var(--shadow)}
.cs-kpi-num{font-family:var(--disp);font-size:1.7rem;color:var(--ink);margin-bottom:4px}
.cs-kpi-num .up{color:var(--sage);font-size:.7em;margin-left:2px}
.cs-kpi-lbl{font-size:10.5px;color:var(--muted);letter-spacing:.02em}

/* Animated hero line chart (overview) */
.cs-hero-chart{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:22px;position:relative;z-index:1;box-shadow:var(--shadow)}
.cs-hero-chart-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:14px}
.cs-hero-chart-head strong{color:var(--ink);font-family:var(--disp);font-size:1.5rem}
.cs-hero-chart-head span{color:var(--muted);font-size:11px}
.cs-chart-svg{width:100%;height:150px;display:block}
.cs-chart-line{fill:none;stroke:var(--sage);stroke-width:2.5;stroke-linecap:round;stroke-dasharray:600;stroke-dashoffset:600;animation:csDrawLine 1.6s cubic-bezier(.16,1,.3,1) forwards .3s}
.cs-chart-fill{opacity:0;animation:csFadeIn 1s ease forwards 1.2s}
@keyframes csDrawLine{to{stroke-dashoffset:0}}
@keyframes csFadeIn{to{opacity:1}}

/* Trusted tools strip */
.cs-tools-strip{display:flex;align-items:center;gap:2rem;flex-wrap:wrap;margin-top:2.2rem;padding-top:1.8rem;border-top:1px solid var(--border);position:relative;z-index:1}
.cs-tools-strip span.lbl{font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.cs-tools-strip .tool-item{display:flex;align-items:center;gap:7px;color:var(--ink2);font-size:13px;font-weight:600}
.cs-tools-strip .tool-item i{color:var(--sage);font-size:15px}

/* ── Sticky filter/sort bar (overview) ── */
.cs-filter-bar{position:sticky;top:66px;z-index:40;background:var(--bg);border-bottom:1px solid var(--border);padding:16px 0}
.cs-filter-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.cs-filter-pills{display:flex;gap:8px;flex-wrap:wrap}
.cs-filter-pill{font-size:12.5px;font-weight:500;padding:8px 16px;border-radius:50px;border:1px solid var(--border);background:var(--card);color:var(--ink2);cursor:pointer;transition:all .2s;white-space:nowrap}
.cs-filter-pill.act{background:var(--sage);border-color:var(--sage);color:#fff}
.cs-filter-pill:not(.act):hover{border-color:var(--sage);color:var(--sage)}
.cs-sort-select{font-size:12.5px;padding:8px 14px;border-radius:8px;border:1px solid var(--border);background:var(--card);color:var(--ink2);font-family:var(--sans)}

/* ── Redesigned summary cards (overview) ── */
.cs-card-grid{display:flex;flex-direction:column;gap:1.25rem;margin-top:2rem}
.cs-card{display:grid;grid-template-columns:280px 1fr auto;gap:1.75rem;align-items:center;background:var(--card);border:1px solid var(--border);border-radius:18px;padding:1.25rem;transition:all .3s ease}
.cs-card:hover{border-color:var(--sage);box-shadow:var(--shadow2);transform:translateY(-3px)}
.cs-card-thumb{position:relative;aspect-ratio:16/10;border-radius:12px;overflow:hidden;background:var(--bg2);display:flex;align-items:center;justify-content:center}
.cs-card-thumb i{font-size:34px;color:rgba(107,140,110,.35)}
.cs-card-featured-badge{position:absolute;top:10px;left:10px;font-size:9.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;background:var(--sage);color:#fff;padding:4px 11px;border-radius:50px;z-index:1}
.cs-card-cat{font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--sage);margin-bottom:8px;display:block}
.cs-card-title{font-family:var(--disp);font-size:1.3rem;color:var(--ink);margin-bottom:8px;line-height:1.25}
.cs-card-desc{font-size:.86rem;color:var(--muted);line-height:1.65;margin-bottom:14px;max-width:520px}
.cs-card-meta{display:flex;gap:1.5rem;flex-wrap:wrap}
.cs-card-meta-item{display:flex;flex-direction:column;gap:2px}
.cs-card-meta-item span.lbl{font-size:9.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.cs-card-meta-item span.val{font-size:12.5px;font-weight:600;color:var(--ink2)}
.cs-card-result{text-align:center;padding-left:1.5rem;border-left:1px solid var(--border);min-width:150px}
.cs-card-result-num{font-family:var(--disp);font-size:1.9rem;color:var(--ink);display:flex;align-items:center;justify-content:center;gap:6px}
.cs-card-result-num .up{color:var(--sage);font-size:.55em;font-weight:700}
.cs-card-result-lbl{font-size:10.5px;color:var(--muted);margin-bottom:12px}
.cs-card-cta{font-size:12.5px;font-weight:600;color:var(--sage);text-decoration:none;display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border:1.5px solid var(--sage);border-radius:8px;transition:all .2s}
.cs-card-cta:hover{background:var(--sage);color:#fff}

@media(max-width:900px){
  .cs-card{grid-template-columns:1fr;text-align:left}
  .cs-card-result{border-left:0;border-top:1px solid var(--border);padding-left:0;padding-top:1rem;text-align:left}
  .cs-hero-grid{grid-template-columns:1fr}
  .cs-kpi-row{grid-template-columns:1fr 1fr}
}

/* ══════════════════════════════════════════════════════
   DETAIL PAGE — shared components
   ══════════════════════════════════════════════════════ */

/* Client info sidebar card (hero) */
.cs-info-card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:22px;position:relative;z-index:1;box-shadow:var(--shadow)}
.cs-info-row{display:flex;justify-content:space-between;align-items:flex-start;padding:11px 0;border-bottom:1px solid var(--border);gap:10px}
.cs-info-row:last-child{border-bottom:0}
.cs-info-row span.lbl{font-size:10.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;flex-shrink:0}
.cs-info-row span.val{font-size:12.5px;color:var(--ink);font-weight:500;text-align:right}
.cs-info-tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end}
.cs-info-tags span{font-size:10px;background:var(--sage-pal);color:var(--sage);border:1px solid var(--border2);padding:3px 9px;border-radius:50px}

/* Sticky tab nav */
.cs-tabnav{position:sticky;top:66px;z-index:40;background:var(--bg);border-bottom:1px solid var(--border)}
.cs-tabnav-inner{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none}
.cs-tabnav-inner::-webkit-scrollbar{display:none}
.cs-tabnav a{flex-shrink:0;padding:16px 20px;font-size:13px;font-weight:600;color:var(--muted);text-decoration:none;border-bottom:2.5px solid transparent;transition:all .2s;white-space:nowrap}
.cs-tabnav a:hover{color:var(--ink)}
.cs-tabnav a.act{color:var(--sage);border-bottom-color:var(--sage)}

/* Challenge section: audit-issue cards */
.cs-audit-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:1.5rem}
.cs-audit-card{background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:16px}
.cs-audit-card i{color:var(--sage);font-size:15px;margin-bottom:8px;display:block}
.cs-audit-card strong{display:block;font-size:13.5px;color:var(--ink);margin-bottom:3px}
.cs-audit-card span{font-size:11.5px;color:var(--muted)}

/* Strategy timeline */
.cs-timeline{display:flex;gap:0;margin-top:2rem;overflow-x:auto;padding-bottom:8px}
.cs-timeline-step{flex:1;min-width:160px;position:relative;padding:0 14px 0 0}
.cs-timeline-step::after{content:'';position:absolute;top:20px;right:0;width:100%;height:2px;background:var(--border)}
.cs-timeline-step:last-child::after{display:none}
.cs-timeline-dot{width:40px;height:40px;border-radius:50%;background:var(--sage);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--disp);font-size:1rem;margin-bottom:14px;position:relative;z-index:1}
.cs-timeline-step h3{font-size:13px;color:var(--ink);margin-bottom:5px;font-weight:600}
.cs-timeline-step p{font-size:11.5px;color:var(--muted);line-height:1.6}

/* Results: animated counter stat grid */
.cs-results-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:1.75rem 0}
.cs-result-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;text-align:center}
.cs-result-card .num{font-family:var(--disp);font-size:1.9rem;color:var(--ink);margin-bottom:4px}
.cs-result-card .num.up{color:var(--sage)}
.cs-result-card .lbl{font-size:11px;color:var(--muted)}

/* Results tabs (Traffic / Keywords / etc.) */
.cs-results-tabs{display:flex;gap:8px;margin-bottom:1.25rem;flex-wrap:wrap}
.cs-results-tab{font-size:12px;font-weight:600;padding:8px 16px;border-radius:50px;border:1px solid var(--border);background:var(--card);color:var(--ink2);cursor:pointer;transition:all .2s}
.cs-results-tab.act{background:var(--sage);border-color:var(--sage);color:#fff}

/* Keyword ranking table */
.cs-kw-table-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:1.25rem}
.cs-kw-table{width:100%;border-collapse:collapse;min-width:480px}
.cs-kw-table th{text-align:left;font-size:10.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);padding:10px 12px;border-bottom:1px solid var(--border)}
.cs-kw-table td{padding:12px;font-size:13px;color:var(--ink2);border-bottom:1px solid var(--border)}
.cs-kw-table tr:last-child td{border-bottom:0}
.cs-kw-before{color:var(--muted)}
.cs-kw-after{color:var(--sage);font-weight:700}
.cs-kw-arrow{color:var(--border2);margin:0 6px}

/* Before/After summary table */
.cs-ba-table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--border);border-radius:14px;overflow:hidden}
.cs-ba-table th{background:var(--bg2);font-size:10.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);padding:12px;text-align:left}
.cs-ba-table th.center,.cs-ba-table td.center{text-align:center}
.cs-ba-table td{padding:12px;font-size:13px;border-top:1px solid var(--border);color:var(--ink2)}
.cs-ba-table td.after{color:var(--sage);font-weight:700}

/* GSC snapshot mini widget */
.cs-gsc-snap{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:14px;overflow:hidden}
.cs-gsc-snap-item{background:var(--card);padding:16px;text-align:center}
.cs-gsc-snap-item .num{font-family:var(--disp);font-size:1.3rem;color:var(--ink)}
.cs-gsc-snap-item .lbl{font-size:10px;color:var(--muted);margin-top:2px}

/* Honesty / caveat callout (used to disclose non-cherry-picked reality) */
.cs-honest-note{display:flex;gap:12px;align-items:flex-start;background:rgba(232,163,61,.08);border:1px solid rgba(232,163,61,.3);border-radius:12px;padding:16px 18px;margin:1.5rem 0;font-size:12.5px;color:var(--muted);line-height:1.7}
.cs-honest-note i{color:#E8A33D;margin-top:2px;flex-shrink:0}
.cs-honest-note strong{color:var(--ink)}

/* Next case study nav */
.cs-next-nav{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1.5rem 0;border-top:1px solid var(--border);margin-top:2rem;flex-wrap:wrap}
.cs-next-nav a{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink2);font-size:13px;transition:color .2s}
.cs-next-nav a:hover{color:var(--sage)}
.cs-next-nav .dir{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;display:block;margin-bottom:2px}

@media(max-width:768px){
  .cs-results-grid{grid-template-columns:1fr 1fr}
  .cs-gsc-snap{grid-template-columns:1fr 1fr}
  .cs-timeline{flex-direction:column}
  .cs-timeline-step::after{display:none}
}

/* Strategy step list (reused pattern from software.css, added here since
   detail pages don't load software.css) */
.swd-check-list{display:flex;flex-direction:column;gap:12px;margin-top:18px}
.swd-check-list li{display:flex;align-items:flex-start;gap:10px;font-size:.95rem;line-height:1.6;list-style:none;color:var(--ink2)}
.swd-check-list i{color:var(--sage);margin-top:4px;flex-shrink:0}

/* ── Quick Answer / TL;DR box — AEO snippet-ready summary ── */
.cs-tldr{background:var(--sage-pal);border:1px solid var(--border2);border-radius:16px;padding:24px 28px;margin:28px 0}
.cs-tldr-label{display:flex;align-items:center;gap:7px;font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--sage2);margin-bottom:10px}
.cs-tldr p{font-size:.95rem;line-height:1.8;color:var(--ink2);margin:0}
.cs-tldr p strong{color:var(--ink)}

/* ── Methodology / "why this order" note ── */
.cs-method-note{margin-top:2rem;padding-top:1.75rem;border-top:1px solid var(--border)}
.cs-method-note h3{font-family:var(--disp);font-size:1.2rem;color:var(--ink);margin-bottom:10px}
.cs-method-note p{font-size:.9rem;line-height:1.8;color:var(--muted)}
.cs-method-note p+p{margin-top:12px}

/* ── Key Takeaways box ── */
.cs-takeaways{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:28px 30px}
.cs-takeaways h3{display:flex;align-items:center;gap:9px;font-family:var(--disp);font-size:1.3rem;color:var(--ink);margin-bottom:16px}
.cs-takeaways h3 i{color:var(--sage);font-size:1rem}
.cs-takeaways ul{display:flex;flex-direction:column;gap:12px}
.cs-takeaways li{display:flex;align-items:flex-start;gap:10px;font-size:.9rem;line-height:1.7;color:var(--ink2)}
.cs-takeaways li::before{content:'\2713';color:var(--sage);font-weight:700;flex-shrink:0}

/* ── Related reading strip ── */
.cs-related-reading{margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--border)}
.cs-related-reading h4{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:14px}
.cs-related-reading-links{display:flex;flex-wrap:wrap;gap:10px}
.cs-related-reading-links a{display:inline-flex;align-items:center;gap:7px;font-size:.85rem;color:var(--ink2);background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:9px 14px;transition:all .2s}
.cs-related-reading-links a:hover{border-color:var(--sage);color:var(--sage)}

/* ── FAQ accordion (reused pattern from blog-post.css / services.css —
   detail pages don't load blog-post.css, so it's duplicated here) ── */
.faq-list { max-width: 800px; margin: 1.5rem 0 0; }
.faq-item { border-bottom: 1px solid var(--border); overflow: hidden; }
.faq-q {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0; cursor: pointer; font-size: .95rem; font-weight: 500;
  color: var(--ink); gap: 1rem; background: transparent; border: none;
  width: 100%; text-align: left; font-family: var(--sans);
}
.faq-q i { font-size: 12px; color: var(--muted); transition: transform .3s; flex-shrink: 0; }
.faq-item.open .faq-q i { transform: rotate(180deg); color: var(--sage); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .4s ease, padding .3s ease; }
.faq-item.open .faq-a { max-height: 500px; padding-bottom: 18px; }
.faq-a p { font-size: .875rem; color: var(--muted); line-height: 1.8; }

/* ── AD SLOTS (Adsterra) ── */
.ad-slot { margin: 32px auto; text-align: center; }
.ad-label {
  font-size: 10px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 8px; opacity: .7;
}
.ad-slot-inner { display: flex; justify-content: center; overflow: hidden; max-width: 100%; }
.ad-slot-cluster { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }
@media(max-width: 860px) { .ad-slot-desktop-only { display: none; } }
@media(min-width: 861px) { .ad-slot-mobile-only { display: none; } }
@media(max-width: 480px) { .ad-slot-hide-xs { display: none; } }

/* ── Hero stat card (page-hero-stats) — reused pattern from about.css,
   added here since case-studies.html doesn't load about.css ── */
.page-hero-stats{display:flex;flex-direction:column;gap:0;min-width:160px}
.page-hero-stat-item{padding:16px 0;text-align:right}
.page-hero-stat-item:first-child{padding-top:0}
.page-hero-stat-item:last-child{padding-bottom:0}
.phs-num{font-size:2rem;font-weight:700;color:var(--sage);font-family:var(--disp);line-height:1}
.phs-lbl{font-size:.78rem;color:var(--muted);margin-top:4px}
.phs-divider{height:1px;background:var(--border)}
@media(max-width:860px){
  .page-hero-stats{flex-direction:row;gap:1.5rem;align-items:flex-start}
  .page-hero-stat-item{text-align:left;padding:0}
  .phs-divider{width:1px;height:auto;align-self:stretch}
}
@media(max-width:600px){
  .page-hero-stats{flex-direction:column;gap:0}
  .phs-divider{width:auto;height:1px}
  .page-hero-stat-item{text-align:right;padding:12px 0}
}