/* =====================================================================
   CASE STUDIES — listing (sidebar + cards) and detail page.  v1.4.1
   Loaded only by case-studies.php, case-study-details.php and the course
   pages (which reuse the sidebar, toolbar, chips, tags and pager).
   Needs site.css first for the tokens (--accent, --line …).
   ===================================================================== */
#results{ scroll-margin-top:90px; }
.cs-layout{ display:grid; gap:28px; grid-template-columns:minmax(0,1fr); align-items:start; }
.cs-main{ min-width:0; }

/* ---------------------------------------------------------- sidebar */
.cs-filters{
  background:#fff; border:1px solid var(--line); border-radius:var(--radius);
}
.cs-filters-toggle{
  display:flex; align-items:center; gap:10px; cursor:pointer; list-style:none;
  padding:16px 20px; font-weight:600; font-size:.95rem;
}
.cs-filters-toggle::-webkit-details-marker{ display:none; }
.cs-filters-toggle::after{
  content:''; width:8px; height:8px; margin-left:auto;
  border-right:2px solid currentColor; border-bottom:2px solid currentColor;
  transform:rotate(45deg); transition:transform .25s var(--ease);
}
.cs-filters[open] .cs-filters-toggle::after{ transform:rotate(225deg); }
.cs-count-badge{
  display:inline-grid; place-items:center; min-width:22px; height:22px; padding:0 6px;
  border-radius:var(--pill); background:var(--accent); color:#fff; font-size:.75rem;
}

.cs-filter-form{ padding:0 20px 20px; display:grid; gap:0; }
.cs-group{ border:0; margin:0; padding:18px 0; border-top:1px solid var(--line); min-width:0; }
.cs-group-title{
  display:block; padding:0; margin:0 0 10px;
  font-size:.72rem; font-weight:600; letter-spacing:.11em; text-transform:uppercase; color:var(--muted);
}
.cs-note, .cs-note-inline{ font-size:.8rem; color:var(--muted); margin:8px 0 0; }
.cs-note-inline{ margin:0 0 0 4px; text-transform:none; letter-spacing:0; font-weight:400; }

.cs-search{ position:relative; }
.cs-search input{
  width:100%; padding:11px 44px 11px 14px; border:1px solid var(--line-strong); border-radius:var(--pill);
  font:inherit; font-size:.93rem; background:#fff; color:var(--ink);
}
.cs-search input:focus{ outline:2px solid var(--accent); outline-offset:1px; border-color:var(--accent); }
.cs-search button{
  position:absolute; right:4px; top:50%; transform:translateY(-50%);
  width:36px; height:36px; border:0; border-radius:50%; background:transparent; color:var(--accent);
  display:grid; place-items:center; cursor:pointer;
}
.cs-search button:hover{ background:var(--brand-tint); }

.cs-select{
  width:100%; padding:10px 12px; border:1px solid var(--line-strong); border-radius:10px;
  font:inherit; font-size:.93rem; background:#fff; color:var(--ink);
}

.cs-option{
  display:flex; align-items:center; gap:10px; padding:6px 0; cursor:pointer; font-size:.92rem;
}
.cs-option input{ width:17px; height:17px; margin:0; accent-color:var(--accent); flex:0 0 auto; }
.cs-option span{ flex:1; min-width:0; }
.cs-option em, .cs-tag-option em{ font-style:normal; font-size:.78rem; color:var(--muted); }
.cs-option:hover span{ color:var(--accent); }

.cs-tag-options{ display:flex; flex-wrap:wrap; gap:8px; }
.cs-tag-option{ position:relative; cursor:pointer; }
.cs-tag-option input{ position:absolute; opacity:0; width:1px; height:1px; }
.cs-tag-option span{
  display:inline-block; padding:6px 12px; border-radius:var(--pill);
  border:1px solid var(--line-strong); font-size:.84rem; background:#fff;
  transition:border-color .15s linear, background .15s linear;
}
.cs-tag-option:hover span{ border-color:var(--accent); }
.cs-tag-option input:checked + span{ background:var(--accent); border-color:var(--accent); color:#fff; }
.cs-tag-option input:checked + span em{ color:rgba(255,255,255,.8); }
.cs-tag-option input:focus-visible + span{ outline:2px solid var(--accent); outline-offset:2px; }

.cs-actions{ display:flex; align-items:center; gap:16px; padding-top:18px; border-top:1px solid var(--line); }
.cs-filter-form.is-live .cs-apply{ display:none; }
.cs-filter-form.is-live .cs-actions:not(:has(.cs-clear)){ display:none; }
.cs-clear{ font-size:.88rem; color:var(--accent); font-weight:600; }

/* ---------------------------------------------------------- toolbar */
.cs-toolbar{ display:flex; flex-wrap:wrap; align-items:center; gap:12px 16px; margin-bottom:22px; }
.cs-summary{ margin:0; color:var(--ink-soft); font-size:.95rem; }
.cs-summary b{ color:var(--ink); }
.cs-active{ list-style:none; display:flex; flex-wrap:wrap; gap:8px; }
.cs-active a{
  display:inline-flex; align-items:center; gap:6px; padding:5px 12px;
  border-radius:var(--pill); background:var(--brand-tint); color:var(--accent-dark);
  font-size:.84rem; font-weight:500; text-decoration:none;
}
.cs-active a:hover{ background:var(--accent); color:#fff; }
.cs-active span{ font-size:1rem; line-height:1; }

/* ------------------------------------------------------------ cards */
.cs-grid{ display:grid; gap:20px; grid-template-columns:minmax(0,1fr); }
.cs-card{
  display:flex; flex-direction:column; overflow:hidden; min-width:0;
  background:#fff; border:1px solid var(--line); border-radius:var(--radius);
  transition:border-color .2s linear, transform .25s var(--ease), box-shadow .25s var(--ease);
}
.cs-card:hover{ border-color:var(--accent); transform:translateY(-3px); box-shadow:0 26px 50px -40px rgba(14,21,18,.5); }
.cs-card.is-featured{ border-color:var(--brand-soft); }
.cs-card-media{ position:relative; display:block; border-bottom:1px solid var(--line); background:var(--brand-wash); }
.cs-card-media img{ width:100%; aspect-ratio:16/9; object-fit:cover; }
.cs-card-noimg{
  display:block; aspect-ratio:16/9;
  background:repeating-linear-gradient(135deg, rgba(62,180,137,.14) 0 12px, rgba(62,180,137,.04) 12px 24px);
}
.cs-badge{
  position:absolute; top:12px; left:12px; padding:4px 10px; border-radius:var(--pill);
  background:var(--ink-deep); color:var(--brand); font-size:.72rem; font-weight:600; letter-spacing:.06em;
  text-transform:uppercase;
}
.cs-card-body{ display:flex; flex-direction:column; gap:10px; flex:1; padding:20px 20px 22px; min-width:0; }
.cs-card-title{ font-size:var(--step-2); }
.cs-card-title a{ text-decoration:none; }
.cs-card-title a:hover{ color:var(--accent); }
.cs-client{ margin:-4px 0 0; font-size:.86rem; color:var(--muted); }

.cs-psr{ display:grid; gap:8px; margin:4px 0 0; padding:12px 0 0; border-top:1px dashed var(--line); }
.cs-psr div{ display:grid; grid-template-columns:78px minmax(0,1fr); gap:10px; }
.cs-psr dt{
  font-size:.7rem; font-weight:600; letter-spacing:.1em; text-transform:uppercase;
  color:var(--accent); padding-top:.2em;
}
.cs-psr dd{ margin:0; font-size:.88rem; color:var(--ink-soft); line-height:1.45; }

.cs-highlight{
  display:flex; align-items:baseline; gap:10px; margin:2px 0 0; padding:10px 12px;
  border-radius:10px; background:var(--brand-wash);
}
.cs-highlight b{ font-size:1.3rem; color:var(--accent-dark); letter-spacing:-.02em; white-space:nowrap; }
.cs-highlight span{ font-size:.84rem; color:var(--ink-soft); }

.cs-tags{ list-style:none; display:flex; flex-wrap:wrap; gap:6px; }
.cs-tags a{
  display:inline-block; padding:3px 10px; border-radius:var(--pill);
  border:1px solid var(--line); font-size:.78rem; color:var(--ink-soft); text-decoration:none;
}
.cs-tags a:hover{ border-color:var(--accent); color:var(--accent); }
.cs-tags-lg{ margin:0 0 26px; }
.cs-tags-lg a{ font-size:.84rem; padding:5px 12px; background:#fff; }
.cs-card .link-more{ margin-top:auto; align-self:flex-start; }

.cs-empty{
  padding:clamp(28px, 4vw, 48px); border:1px dashed var(--line-strong); border-radius:var(--radius);
  background:var(--brand-wash); display:grid; gap:14px; justify-items:start;
}

/* -------------------------------------------------------- pagination */
.cs-pager{ display:flex; flex-wrap:wrap; align-items:center; justify-content:center; gap:12px; margin-top:34px; }
.cs-pager ol{ list-style:none; display:flex; gap:6px; margin:0; padding:0; }
.cs-pager ol a{
  display:grid; place-items:center; min-width:40px; height:40px; padding:0 8px; border-radius:var(--pill);
  border:1px solid var(--line); text-decoration:none; font-size:.9rem; font-weight:500;
}
.cs-pager ol a:hover{ border-color:var(--accent); color:var(--accent); }
.cs-pager ol a[aria-current]{ background:var(--accent); border-color:var(--accent); color:#fff; }
.cs-pager .gap{ align-self:center; color:var(--muted); padding:0 2px; }

/* ------------------------------------------------------- detail page */
.cs-hero-solo{ grid-template-columns:minmax(0,1fr) !important; }
.cs-hero-solo .hero-copy{ max-width:72ch; }
.cs-detail-hero .hero-media img{ aspect-ratio:16/10; }

.cs-metrics-band{ padding-block:clamp(30px, 4vw, 52px); }
.cs-metrics{ list-style:none; display:grid; gap:20px; grid-template-columns:repeat(2, minmax(0,1fr)); }
.cs-metrics li{ display:flex; flex-direction:column; gap:2px; min-width:0; }
.cs-metrics b{ font-size:clamp(1.8rem, 1.3rem + 2vw, 2.8rem); color:var(--brand); letter-spacing:-.03em; line-height:1.1; }
.cs-metric-label{ font-size:.92rem; color:#fff; font-weight:500; }
.cs-metric-before{ font-size:.82rem; color:rgba(255,255,255,.62); }

.cs-story{ display:grid; gap:0; min-width:0; }
.cs-block{
  display:grid; grid-template-columns:minmax(0,1fr); gap:6px;
  padding:28px 0; border-top:1px solid var(--line);
}
.cs-block:first-child{ border-top:0; padding-top:0; }
.cs-block-num{ margin:0; font-size:.8rem; font-weight:600; letter-spacing:.14em; color:var(--brand); }
.cs-block-title{ margin-bottom:12px; }
.cs-block-body{ max-width:68ch; }
.cs-block-body p, .cs-block-body li{ font-size:var(--step-1); color:var(--ink-soft); }
.cs-block-body ul, .cs-block-body ol{ padding-left:1.2em; margin:0 0 1rem; display:grid; gap:6px; }

.cs-aside{ position:relative; }
.cs-more-links{ list-style:none; display:grid; gap:10px; }
.cs-more-links a{ font-size:.92rem; color:var(--accent); text-decoration:none; font-weight:500; }
.cs-more-links a:hover{ text-decoration:underline; }

.cs-gallery{ list-style:none; display:grid; gap:14px; grid-template-columns:repeat(2, minmax(0,1fr)); }
.cs-gallery a{ display:block; border-radius:var(--radius); overflow:hidden; }
.cs-gallery img{ width:100%; aspect-ratio:4/3; object-fit:cover; transition:transform .4s var(--ease); }
.cs-gallery a:hover img{ transform:scale(1.03); }

.cs-related-head{ display:flex; align-items:baseline; justify-content:space-between; gap:16px; max-width:none; }
.cs-card-compact .cs-card-body{ gap:8px; }

@media (min-width:600px){
  .cs-grid{ grid-template-columns:repeat(2, minmax(0,1fr)); }
  .cs-metrics{ grid-template-columns:repeat(auto-fit, minmax(170px, 1fr)); }
  .cs-gallery{ grid-template-columns:repeat(3, minmax(0,1fr)); }
}
@media (min-width:900px){
  .cs-layout{ grid-template-columns:280px minmax(0,1fr); gap:36px; }
  .cs-sidebar{ position:sticky; top:94px; max-height:calc(100vh - 110px); overflow-y:auto; }
  .cs-filters-toggle{ cursor:default; pointer-events:none; }
  .cs-filters-toggle::after{ display:none; }
  .cs-block{ grid-template-columns:70px minmax(0,1fr); gap:20px; }
  .cs-block-num{ padding-top:.45em; }
  .cs-aside{ position:sticky; top:94px; }
  .cs-grid-3{ grid-template-columns:repeat(3, minmax(0,1fr)); }
}

@media print{
  .cs-sidebar, .cs-share, .cs-aside, .cta-band, .cs-pager{ display:none !important; }
  .cs-metrics-band{ background:#fff; color:var(--ink); }
  .cs-metric-label, .cs-metric-before{ color:var(--ink); }
}