/* ============================================================
   CASE STUDY — redesigned single template (2026-06-17)
   Scoped under .cs. Blue by default; add .cs--gold for a warm
   client-tuned variant (Eyes on Skin Spa). Used ONLY by the
   /case-study/ pages — /project/ pages keep project-single.css.
   ============================================================ */
.cs{
  --accent-rgb:0,153,255;
  --shade-rgb:6,8,20;          /* dark base used in gradients/shadows */
  --text-rgb:255,255,255;
  --bg:#060814; --surface:#0a0c18; --surface2:#070b16;
  --accent:rgba(var(--accent-rgb),1);
  --accent-60:rgba(var(--accent-rgb),.6);
  --accent-15:rgba(var(--accent-rgb),.16);
  --accent-08:rgba(var(--accent-rgb),.08);
  --t1:rgba(var(--text-rgb),.92);
  --t2:rgba(var(--text-rgb),.55);
  --t3:rgba(var(--text-rgb),.35);
  --serif:'Cormorant Garamond',Georgia,serif;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--bg); color:var(--t1);
  font-family:var(--sans); -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
/* warm / gold variant */
.cs.cs--gold{
  --accent-rgb:212,164,74;
  --shade-rgb:11,10,8;
  --text-rgb:255,250,243;
  --bg:#0b0a08; --surface:#100d09; --surface2:#0c0a07;
}
/* EoS hero: LED light-therapy scene */
.cs.cs--gold .hero-bg img{object-position:50% 46%}
.cs *{box-sizing:border-box}
.cs .wrap{max-width:1120px;margin:0 auto;padding:0 40px}
.cs .tag{font-size:.66rem;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--accent)}
.cs .label{font-size:.7rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);display:block;margin-bottom:18px}
.cs h1,.cs h2{margin:0}
.cs h2{font-family:var(--serif);font-weight:300;line-height:1.2;font-size:clamp(1.9rem,3vw,2.7rem)}
.cs h2 em{font-style:italic;color:var(--accent)}
.cs p.prose{font-size:1.02rem;font-weight:300;line-height:1.85;color:var(--t2);margin:0}
.cs .prose .hl{color:var(--t1);font-weight:400}

/* ===== HERO (full-bleed subject) ===== */
.cs .hero{position:relative;min-height:62vh;display:flex;align-items:flex-end;overflow:hidden}
.cs .hero-bg{position:absolute;inset:0;z-index:0}
.cs .hero-bg img{width:100%;height:100%;object-fit:cover;object-position:50% 42%}
.cs .hero-bg::after{content:'';position:absolute;inset:0;background:
  linear-gradient(180deg,rgba(var(--shade-rgb),.55) 0%,rgba(var(--shade-rgb),.12) 32%,rgba(var(--shade-rgb),.5) 68%,rgba(var(--shade-rgb),.96) 100%),
  linear-gradient(90deg,rgba(var(--shade-rgb),.62),transparent 55%)}
.cs .hero-inner{position:relative;z-index:2;width:100%;max-width:1120px;margin:0 auto;padding:0 40px 58px}
.cs .hero-eyebrow{display:flex;align-items:center;gap:14px;margin-bottom:20px}
.cs .hero-eyebrow .rule{height:1px;width:46px;background:var(--accent);opacity:.82}
.cs .hero h1{font-family:var(--serif);font-weight:300;line-height:1.05;font-size:clamp(2.8rem,6vw,5rem);margin:0 0 16px}
.cs .hero-sum{font-family:var(--serif);font-style:italic;font-size:clamp(1.2rem,2vw,1.6rem);font-weight:300;line-height:1.4;color:var(--t1);max-width:28ch;margin-bottom:24px;text-shadow:0 2px 22px rgba(0,0,0,.5)}
.cs .hero-sum em{color:var(--accent);font-style:italic}
.cs .hero-cta{display:inline-flex;align-items:center;gap:9px;font-size:.82rem;font-weight:500;color:var(--accent);text-decoration:none;border:1px solid var(--accent-15);background:rgba(var(--shade-rgb),.45);backdrop-filter:blur(4px);padding:12px 22px;border-radius:6px;transition:border-color .25s ease,box-shadow .25s ease}
.cs .hero-cta:hover{border-color:var(--accent-60);box-shadow:0 0 24px rgba(var(--accent-rgb),.14)}
.cs .hero::after{content:'';position:absolute;left:0;right:0;bottom:0;height:1px;z-index:3;background:linear-gradient(90deg,transparent,var(--accent-60) 50%,transparent)}

/* ===== META strip ===== */
.cs .meta{border-bottom:1px solid rgba(255,255,255,.06);background:var(--surface2)}
.cs .meta-grid{display:grid;grid-template-columns:repeat(4,1fr) auto;align-items:start}
.cs .meta-item{padding:26px 0}
.cs .meta-item+.meta-item{padding-left:30px;border-left:1px solid rgba(255,255,255,.05)}
.cs .meta-k{font-size:.62rem;letter-spacing:.2em;text-transform:uppercase;color:var(--t3);margin-bottom:6px}
.cs .meta-v{font-size:.92rem;color:var(--t1)}
.cs .meta-visit{padding-left:34px;align-self:center}
.cs .meta-visit a{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:500;color:var(--accent);text-decoration:none;white-space:nowrap;border-bottom:1px solid var(--accent-15);padding-bottom:3px;transition:border-color .2s ease}
.cs .meta-visit a:hover{border-color:var(--accent-60)}

/* ===== CHALLENGE (text-led, asymmetric) ===== */
.cs .challenge{padding:92px 0 72px}
.cs .challenge-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:64px;align-items:start}
.cs .lead{font-family:var(--serif);font-weight:300;font-size:clamp(1.7rem,2.7vw,2.3rem);line-height:1.32;color:var(--t1)}
.cs .lead em{font-style:italic;color:var(--accent)}

/* ===== WHAT WE BUILT ===== */
.cs .build{padding:32px 0 90px;background:var(--surface)}
.cs .build-head{max-width:700px;margin:0 auto 44px;text-align:center}
.cs .build-head h2{margin-top:8px}
.cs .build-head p{font-size:1.02rem;font-weight:300;line-height:1.8;color:var(--t2);margin-top:18px}
.cs .build-head .hl{color:var(--t1);font-weight:400}

/* framed browser mockup (replaces full-page capture) */
.cs .browser{border-radius:14px;overflow:hidden;background:#0b0f1e;box-shadow:0 36px 90px rgba(0,0,0,.55),0 0 0 1px rgba(255,255,255,.07)}
.cs .browser .bar{display:flex;align-items:center;gap:7px;padding:12px 16px;border-bottom:1px solid rgba(255,255,255,.07);background:#0e1322}
.cs .browser .bar i{width:10px;height:10px;border-radius:50%;display:inline-block}
.cs .browser .bar .r{background:#ff5f57}.cs .browser .bar .y{background:#febc2e}.cs .browser .bar .g{background:#28c840}
.cs .browser .bar .url{margin-left:14px;font-size:.7rem;color:rgba(255,255,255,.4);background:#070b16;padding:6px 14px;border-radius:6px;flex:1;max-width:320px}
.cs .browser .vp{max-height:560px;overflow:hidden;position:relative}
.cs .browser .vp img{width:100%;display:block}
.cs .browser .vp::after{content:'';position:absolute;left:0;right:0;bottom:0;height:90px;background:linear-gradient(transparent,#0b0f1e)}
.cs .cap-row{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:22px}
.cs .cap-row span{font-size:.72rem;color:var(--t2);padding:7px 14px;border:1px solid rgba(255,255,255,.07);border-radius:999px;background:rgba(255,255,255,.02)}

/* three-theme trio (Eyes on Skin) */
.cs .themes{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cs .theme img{width:100%;display:block;border-radius:12px;box-shadow:0 18px 48px rgba(0,0,0,.5),0 0 0 1px rgba(255,255,255,.06);transition:transform .3s ease}
.cs .theme:hover img{transform:translateY(-4px)}
.cs .theme .tl{display:block;text-align:center;margin-top:14px;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--t2)}
.cs .theme .tl b{color:var(--accent);font-weight:600}
.cs .build-note{text-align:center;margin:36px auto 0;max-width:640px;font-size:.95rem;font-weight:300;color:var(--t2);line-height:1.75}
.cs .build-note .hl{color:var(--t1);font-weight:400}

/* ===== RESULTS card ===== */
.cs .results{padding:30px 0 90px}
.cs .results-card{background:linear-gradient(180deg,var(--surface),var(--surface2));border:1px solid rgba(255,255,255,.06);border-radius:18px;padding:54px 46px;text-align:center;position:relative;overflow:hidden}
.cs .results-card::before{content:'';position:absolute;top:0;left:15%;right:15%;height:1px;background:linear-gradient(90deg,transparent,var(--accent-60),transparent);opacity:.5}
.cs .results-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-top:28px}
.cs .rnum{font-family:var(--serif);font-size:3.2rem;font-weight:300;color:var(--accent);line-height:1}
.cs .rlab{font-size:.8rem;color:var(--t2);margin-top:8px}
.cs .rdiv{height:1px;background:rgba(255,255,255,.06);margin:40px 0 26px}
.cs .kw-lead{font-size:.92rem;font-weight:300;color:var(--t2);max-width:640px;margin:0 auto 18px;line-height:1.7}
.cs .kw{display:flex;flex-wrap:wrap;gap:9px;justify-content:center}
.cs .kw span{font-size:.72rem;color:var(--t2);padding:7px 13px;border:1px solid var(--accent-15);border-radius:999px;background:var(--accent-08)}
.cs .kw span b{color:var(--accent);margin-right:5px}
.cs .tech-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:center;margin-top:32px}
.cs .tech-row .tlab{font-size:.6rem;letter-spacing:.2em;text-transform:uppercase;color:var(--t3)}
.cs .tech-row .tt{font-size:.7rem;color:var(--t2);padding:5px 12px;border:1px solid rgba(255,255,255,.07);border-radius:4px}

/* ===== PERFORMANCE vs THE FIELD (Auto Elite) ===== */
.cs .perf{padding:30px 0 90px;background:var(--bg)}
.cs .perf-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:8px}
.cs .perf-block{background:linear-gradient(180deg,var(--surface),var(--surface2));border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:30px 30px 26px}
.cs .perf-title{font-size:.74rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:rgba(var(--text-rgb),.78);margin-bottom:24px}
.cs .bar-row{display:grid;grid-template-columns:118px 1fr 54px;align-items:center;gap:12px;margin-bottom:15px}
.cs .bar-lab{font-size:.78rem;color:var(--t2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cs .bar{height:8px;background:rgba(255,255,255,.09);border-radius:999px;overflow:hidden}
.cs .bar span{display:block;height:100%;border-radius:999px;background:rgba(255,255,255,.32)}
.cs .bar-val{font-size:.78rem;color:var(--t2);text-align:right;font-variant-numeric:tabular-nums}
.cs .bar-row.best .bar-lab{color:var(--t1);font-weight:600}
.cs .bar-row.best .bar span{background:var(--accent)}
.cs .bar-row.best .bar-val{color:var(--accent);font-weight:700}
.cs .perf-note{margin-top:10px;font-size:.76rem;color:var(--t3);line-height:1.5}
.cs .perf-why{max-width:760px;margin:34px auto 0;text-align:center;font-size:.95rem;font-weight:300;line-height:1.72;color:var(--t2)}
.cs .perf-why .hl{color:var(--t1);font-weight:400}

/* ===== TESTIMONIAL (short, Auto Elite) ===== */
.cs .quote{padding:88px 0;text-align:center;background:var(--surface);position:relative}
.cs .quote::before{content:'';position:absolute;top:0;left:12%;right:12%;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent)}
.cs .quote .mark{font-family:var(--serif);font-size:3.4rem;color:rgba(var(--accent-rgb),.18);line-height:1}
.cs .quote blockquote{font-family:var(--serif);font-style:italic;font-weight:300;font-size:clamp(1.2rem,2vw,1.6rem);line-height:1.6;max-width:720px;margin:8px auto 22px;color:var(--t1);border:none;padding:0}
.cs .quote .by{font-size:.82rem;color:var(--t3)}.cs .quote .by b{color:var(--t2);font-weight:600}

/* ===== TESTIMONIAL (long, "In Paula's words") ===== */
.cs .pquote{padding:90px 0 96px;background:var(--surface)}
.cs .pquote-inner{max-width:720px;margin:0 auto}
.cs .pq-label{display:block;text-align:center;font-size:.72rem;letter-spacing:.24em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:.9rem}
.cs .pq-head{text-align:center;font-family:var(--serif);font-style:italic;font-weight:400;font-size:clamp(1.6rem,2.6vw,2.3rem);line-height:1.25;color:#fff;margin:0 0 2.6rem}
.cs .pq-body p{font-size:1.04rem;line-height:1.85;color:var(--t1);font-weight:300;margin:0 0 1.25rem}
.cs .pq-body p:first-child::first-letter{font-family:var(--serif);font-size:3.1rem;line-height:.8;float:left;margin:6px 14px 0 0;color:var(--accent)}
.cs .pq-cite{margin-top:2.4rem;padding-top:1.6rem;border-top:1px solid rgba(255,255,255,.12);text-align:center}
.cs .pq-cite b{display:block;color:#fff;font-weight:600;letter-spacing:.02em}
.cs .pq-cite span{display:block;margin-top:.25rem;color:var(--t2);font-size:.9rem}

/* ===== PREV / NEXT NAV  (matches the /project/ pages spacing) ===== */
.cs .cs-nav{padding:0 40px;background:var(--surface2);border-top:1px solid rgba(255,255,255,.05)}
.cs .cs-nav-inner{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr}
.cs .cs-nav-link{padding:40px 0;text-decoration:none;display:flex;flex-direction:column;gap:8px;transition:background .2s ease}
.cs .cs-nav-link:first-child{border-right:1px solid rgba(255,255,255,.05);padding-right:40px}
.cs .cs-nav-link:last-child{padding-left:40px;text-align:right;align-items:flex-end}
.cs .cs-nav-dir{font-size:.65rem;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--t3);transition:color .2s ease}
.cs .cs-nav-name{font-family:var(--serif);font-size:1.3rem;font-weight:400;color:var(--t2);transition:color .2s ease}
.cs .cs-nav-link:hover .cs-nav-dir{color:var(--accent)}
.cs .cs-nav-link:hover .cs-nav-name{color:var(--t1)}

/* ===== BACK-TO-PORTFOLIO CTA ===== */
.cs .cs-backcta{padding:60px 40px 100px;text-align:center;background:var(--bg)}
.cs .cs-backcta a{font-size:.78rem;font-weight:500;letter-spacing:.15em;text-transform:uppercase;color:var(--accent);text-decoration:none;padding:14px 36px;border:1px solid var(--accent-15);border-radius:4px;transition:all .3s ease}
.cs .cs-backcta a:hover{background:var(--accent-08);border-color:var(--accent-60);box-shadow:0 0 20px rgba(var(--accent-rgb),.1)}

/* ===== RESPONSIVE ===== */
@media(max-width:820px){
  .cs .wrap,.cs .hero-inner{padding-left:22px;padding-right:22px}
  .cs .hero{min-height:54vh}
  .cs .meta-grid{grid-template-columns:1fr 1fr}
  .cs .meta-item+.meta-item{padding-left:0;border-left:none}
  .cs .meta-item{padding:18px 0;border-top:1px solid rgba(255,255,255,.05)}
  .cs .meta-visit{padding-left:0}
  .cs .challenge-grid{grid-template-columns:1fr;gap:28px}
  .cs .perf-grid{grid-template-columns:1fr;gap:18px}
  .cs .bar-row{grid-template-columns:96px 1fr 48px;gap:10px}
  .cs .themes{grid-template-columns:1fr;gap:26px}
  .cs .results-grid{grid-template-columns:1fr;gap:26px}
  .cs .cs-nav{padding-left:24px;padding-right:24px}
  .cs .cs-nav-inner{grid-template-columns:1fr}
  .cs .cs-nav-link:first-child{border-right:none;border-bottom:1px solid rgba(255,255,255,.05);padding-right:0}
  .cs .cs-nav-link:last-child{padding-left:0;text-align:left;align-items:flex-start}
}