/* =========================================================
   Case Studies LIST (case-)
   File: /css/pages/case-studies.css
   Style: Investment-bank x AI strategy (clean + premium)
   ========================================================= */

:root{
  --case-bg:#f6f8fb;
  --case-text:#0f172a;
  --case-muted:#64748b;
  --case-border:#e6eaf2;

  --case-brand:#0b63f6;
  --case-brand2:#063b78;
  --case-ok:#10b981;

  --case-radius:18px;
  --case-shadow:0 18px 60px rgba(15,23,42,.08);
  --case-shadow2:0 10px 30px rgba(15,23,42,.08);

  --case-ring:0 0 0 4px rgba(11,99,246,.14);
}

/* container compatibility (wrap + container) */
.case-hero .container,
.case-hero .wrap,
.filters .container,
.filters .wrap,
.case-studies-grid .container,
.case-studies-grid .wrap,
.results-summary .container,
.results-summary .wrap,
.cta-section .container,
.cta-section .wrap{
  max-width:1100px;
  margin:0 auto;
  padding:0 20px;
}

/* ---------------------------
   HERO
--------------------------- */
.case-hero{
  padding:82px 0 54px;
  background:
    radial-gradient(900px 450px at 12% 12%, rgba(11,99,246,.16), transparent 60%),
    radial-gradient(900px 450px at 92% 18%, rgba(16,185,129,.12), transparent 60%),
    linear-gradient(180deg, #ffffff 0%, var(--case-bg) 100%);
  border-bottom:1px solid var(--case-border);
  position:relative;
  overflow:hidden;
}

.case-hero .breadcrumb{
  font-size:14px;
  color:var(--case-muted);
  display:flex;
  gap:10px;
  align-items:center;
  flex-wrap:wrap;
  margin-bottom:12px;
}
.case-hero .breadcrumb a{
  color:inherit;
  text-decoration:none;
  font-weight:900;
}
.case-hero .breadcrumb a:hover{ color:var(--case-brand); text-decoration:underline; }

.case-hero h1{
  margin:0 0 12px 0;
  font-size:46px;
  font-weight:950;
  letter-spacing:-.6px;
  line-height:1.06;
  color:var(--case-text);
}
@media(max-width:560px){
  .case-hero h1{ font-size:34px; }
}

.case-hero .hero-subtitle{
  margin:0;
  max-width:820px;
  color:var(--case-muted);
  line-height:1.75;
  font-size:17px;
}

/* ---------------------------
   FILTERS
--------------------------- */
.filters{
  background:var(--case-bg);
  padding:18px 0 0;
}

.filter-buttons{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.filter-btn{
  appearance:none;
  border:1px solid var(--case-border);
  background:#fff;
  color:var(--case-text);
  font-weight:950;
  font-size:13px;
  padding:10px 14px;
  border-radius:999px;
  cursor:pointer;
  transition: transform .15s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease, color .2s ease;
}

.filter-btn:hover{
  border-color:rgba(11,99,246,.22);
  box-shadow:0 12px 30px rgba(15,23,42,.08);
  transform: translateY(-1px);
}

.filter-btn.active{
  background: linear-gradient(135deg, var(--case-brand) 0%, #1677ff 45%, var(--case-brand2) 100%);
  border-color:transparent;
  color:#fff;
  box-shadow:0 14px 40px rgba(11,99,246,.20);
}

/* ---------------------------
   GRID
--------------------------- */
.case-studies-grid{
  background:var(--case-bg);
  padding:22px 0 70px;
}

.cases-grid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap:14px;
}
@media(max-width:980px){
  .cases-grid{ grid-template-columns:1fr; }
}

.case-card{
  background:rgba(255,255,255,.92);
  border:1px solid rgba(230,234,242,.95);
  border-radius:var(--case-radius);
  overflow:hidden;
  box-shadow: var(--case-shadow2);
  transition: transform .18s ease, box-shadow .2s ease, border-color .2s ease;
  display:flex;
  flex-direction:column;
  min-height: 100%;
}

.case-card:hover{
  transform: translateY(-2px);
  box-shadow: var(--case-shadow);
  border-color: rgba(11,99,246,.22);
}

.case-image{
  position:relative;
  background:#0b1220;
}
.case-image img{
  width:100%;
  height:190px;
  object-fit:cover;
  display:block;
  filter:saturate(1.02) contrast(1.03);
}
@media(max-width:980px){
  .case-image img{ height:200px; }
}

.case-content{
  padding:18px;
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1;
}

.case-content h3{
  margin:0;
  font-size:18px;
  letter-spacing:-.2px;
  line-height:1.25;
  color:var(--case-text);
  font-weight:950;
}

.case-client{
  margin:0;
  color:var(--case-muted);
  line-height:1.65;
  font-size:13.5px;
}

.case-category{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 10px;
  border-radius:999px;
  font-weight:950;
  font-size:.82rem;
  width:fit-content;
  border:1px solid rgba(11,99,246,.18);
  background:rgba(11,99,246,.08);
  color:var(--case-brand);
}

/* optional color tags by category (matches your data-filter values) */
.case-category.ipo-advisory-tag{ border-color: rgba(11,99,246,.22); background:rgba(11,99,246,.08); color:var(--case-brand); }
.case-category.ai-solutions-tag{ border-color: rgba(16,185,129,.25); background:rgba(16,185,129,.10); color:#047857; }
.case-category.hrdc-training-tag{ border-color: rgba(245,158,11,.25); background:rgba(245,158,11,.10); color:#92400e; }

.case-stats{
  margin-top:auto;
  padding-top:8px;
  border-top:1px solid rgba(230,234,242,.9);
}
.case-stats .stat{
  display:inline-flex;
  font-weight:900;
  color:var(--case-muted);
  font-size:12.5px;
}

.case-link{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:950;
  text-decoration:none;
  color:var(--case-brand);
  margin-top:2px;
}
.case-link:hover{ text-decoration:underline; }

/* empty state */
.no-cases{
  background:#fff;
  border:1px solid var(--case-border);
  border-radius:var(--case-radius);
  padding:20px;
  box-shadow: var(--case-shadow2);
  color:var(--case-muted);
  font-weight:900;
}

/* ---------------------------
   RESULTS SUMMARY
--------------------------- */
.results-summary{
  padding:70px 0;
  background:#fff;
  border-top:1px solid var(--case-border);
}

.results-summary h2{
  margin:0;
  font-size:28px;
  font-weight:950;
  letter-spacing:-.3px;
  color:var(--case-text);
}
.results-summary p{
  margin:10px 0 0 0;
  color:var(--case-muted);
  line-height:1.75;
  max-width:820px;
}

.summary-stats{
  margin-top:18px;
  display:grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap:12px;
}
@media(max-width:980px){
  .summary-stats{ grid-template-columns:1fr 1fr; }
}
@media(max-width:560px){
  .summary-stats{ grid-template-columns:1fr; }
}

.stat-item{
  background:var(--case-bg);
  border:1px solid var(--case-border);
  border-radius:16px;
  padding:14px;
}

.stat-number{
  font-size:1.35rem;
  font-weight:950;
  letter-spacing:-.2px;
  color:var(--case-text);
}
.stat-label{
  margin-top:6px;
  color:var(--case-muted);
  line-height:1.7;
  font-weight:800;
  font-size:13px;
}

/* ---------------------------
   CTA BAND (premium dark)
--------------------------- */
.cta-section{
  padding:78px 0;
  background:
    radial-gradient(850px 420px at 18% 28%, rgba(11,99,246,.28), transparent 60%),
    radial-gradient(850px 420px at 84% 20%, rgba(16,185,129,.16), transparent 60%),
    linear-gradient(135deg,#0b5cab 0%, #063b78 55%, #052a56 100%);
  color:#fff;
  text-align:center;
  position:relative;
  overflow:hidden;
}

.cta-section h2{
  margin:0 0 12px 0;
  font-size:30px;
  font-weight:950;
  letter-spacing:-.3px;
}
.cta-section p{
  margin:0 auto 18px auto;
  max-width:820px;
  color:rgba(255,255,255,.86);
  line-height:1.75;
}

.cta-section .btn,
.cta-section .btn-primary,
.cta-section a.btn,
.cta-section a.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:12px 18px;
  border-radius:14px;
  font-weight:950;
  text-decoration:none;
  color:#fff;
  background: linear-gradient(135deg, var(--case-brand) 0%, #1677ff 45%, var(--case-brand2) 100%);
  box-shadow: 0 14px 40px rgba(11,99,246,.22);
  border:1px solid rgba(255,255,255,.12);
}
.cta-section .btn:hover,
.cta-section .btn-primary:hover{
  filter:brightness(.98);
}

.case-hero--img{
  background:
    radial-gradient(900px 450px at 12% 12%, rgba(11,99,246,.18), transparent 60%),
    radial-gradient(900px 450px at 92% 18%, rgba(16,185,129,.14), transparent 60%),
    linear-gradient(180deg, rgba(3,7,18,.55), rgba(3,7,18,.75)),
    var(--cs-hero-img);
  background-size: cover;
  background-position: center;
  color: #fff;
}
.case-hero--img .breadcrumb a{ color: rgba(255,255,255,.86); }
.case-hero--img .hero-subtitle{ color: rgba(255,255,255,.86); }
.case-hero--img h1{ color:#fff; }