/* =====================================================
   CASE STUDY PAGE — fullscreen portfolio slider + project view
   ===================================================== */
:root{
  --ease-out:cubic-bezier(.16,1,.3,1);
  --ease-io:cubic-bezier(.77,0,.18,1);
  --pad:56px;
  --bar-h:88px;
}
body.cs-body{overflow:hidden;height:100vh;}

/* ---------- SLIDER ---------- */
.cs{position:fixed;inset:0;background:#0a0a0a;overflow:hidden;color:#fff;}
.cs-slides{position:absolute;inset:0;}
.cs-slide{position:absolute;inset:0;visibility:hidden;}
.cs-slide.is-active{visibility:visible;z-index:2;}
.cs-slide.is-leaving{visibility:visible;z-index:1;}
.cs-slide.pre{visibility:visible;z-index:3;}

.cs-bg{
  position:absolute;inset:0;overflow:hidden;
  clip-path:inset(100% 0 0 0);
  transition:clip-path 1.15s var(--ease-io);
}
.cs-slide.pre .cs-bg{transition:none;}
.cs-slide.pre[data-dir="prev"] .cs-bg{clip-path:inset(0 0 100% 0);}
.cs-slide.is-active .cs-bg{clip-path:inset(0 0 0 0);}
.cs-slide.is-leaving .cs-bg{clip-path:inset(0 0 0 0);}
.cs-bg::after{
  content:"";position:absolute;inset:0;z-index:2;
  background:
    linear-gradient(180deg,rgba(6,8,14,.5) 0%,rgba(6,8,14,.15) 35%,rgba(6,8,14,.85) 100%),
    linear-gradient(90deg,rgba(6,8,14,.55) 0%,rgba(6,8,14,0) 65%);
}
.cs-par{
  position:absolute;inset:-4%;
  transform:translate3d(calc(var(--px,0) * -26px),calc(var(--py,0) * -26px),0);
  transition:transform .9s ease-out;
}
.cs-par img{
  width:100%;height:100%;object-fit:cover;
  transform:scale(1.35);
  transition:transform 0s;
}
.cs-slide.is-active .cs-par img{
  transform:scale(1);
  transition:transform 2.2s var(--ease-out);
}
.cs-slide.is-leaving .cs-par img{
  transform:translateY(-14%) scale(1.06);
  transition:transform 1.15s var(--ease-io);
}
.cs-slide.is-leaving[data-dir="prev"] .cs-par img{transform:translateY(14%) scale(1.06);}

/* content */
.cs-content{
  position:absolute;z-index:5;
  left:var(--pad);bottom:150px;
  max-width:820px;width:calc(100% - var(--pad)*2);
}
.cs-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:26px;}
.cs-tag{
  font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  border:1px solid rgba(255,255,255,.35);border-radius:100px;padding:6px 14px;
  transition:.3s ease;
}
.cs-tag:hover{background:var(--blue);border-color:var(--blue);}
.cs-date{font-size:12px;color:rgba(255,255,255,.65);margin-left:8px;letter-spacing:.04em;}
.cs-title{
  font-family:'Space Grotesk',sans-serif;font-weight:600;letter-spacing:-.035em;
  font-size:clamp(38px,6.4vw,100px);line-height:1.02;color:#fff;
  margin-bottom:26px;
}
.w{display:inline-block;overflow:hidden;vertical-align:top;padding-bottom:.1em;margin-bottom:-.1em;}
.w > span{display:inline-block;will-change:transform;}
.cs-title .w > span{
  transform:translateY(112%);
  transition:transform 1s var(--ease-out);
  transition-delay:calc(.6s + var(--i) * .07s);
}
.cs-slide.is-active .cs-title .w > span{transform:translateY(0);}
.cs-slide.is-leaving .cs-title .w > span{
  transform:translateY(-112%);
  transition:transform .55s ease-in;transition-delay:calc(var(--i) * .02s);
}
.cs-slide.is-leaving[data-dir="prev"] .cs-title .w > span{transform:translateY(112%);}
.cs-slide:not(.is-active):not(.is-leaving) .cs-title .w > span{transition:none;transform:translateY(112%);}

.rv{opacity:0;transform:translateY(24px);}
.cs-slide.is-active .rv{
  opacity:1;transform:none;
  transition:opacity .9s ease,transform .9s var(--ease-out);
  transition-delay:var(--d,.5s);
}
.cs-slide.is-leaving .rv{opacity:0;transition:opacity .35s ease;}
.cs-slide:not(.is-active):not(.is-leaving) .rv{transition:none;}
.cs-excerpt{color:rgba(255,255,255,.78);font-size:17px;max-width:520px;margin-bottom:34px;}
.cs-show{background:#fff;color:#111;}
.cs-show .btn-arrow{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:50%;background:#111;color:#fff;font-size:13px;
  transition:transform .35s var(--ease-out);
}
.cs-show:hover{background:var(--blue);color:#fff;}
.cs-show:hover .btn-arrow{transform:translateX(4px) rotate(-45deg);background:#fff;color:var(--blue);}

/* ---------- SLIDER UI ---------- */
.cs-ui{
  position:absolute;left:var(--pad);right:var(--pad);bottom:34px;z-index:10;
  display:flex;align-items:center;justify-content:space-between;
}
.cs-scroll{
  position:absolute;left:50%;transform:translateX(-50%);bottom:0;
  display:flex;flex-direction:column;align-items:center;gap:10px;
  font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:rgba(255,255,255,.7);
}
.cs-scroll i{display:block;width:1px;height:46px;background:rgba(255,255,255,.25);position:relative;overflow:hidden;}
.cs-scroll i::after{
  content:"";position:absolute;left:0;top:-50%;width:100%;height:50%;background:#fff;
  animation:scrollLine 1.8s var(--ease-io) infinite;
}
@keyframes scrollLine{0%{top:-50%;}100%{top:100%;}}

.cs-count{margin-left:auto;display:flex;align-items:center;gap:16px;font-family:'Space Grotesk',sans-serif;font-size:15px;}
.cs-roll{display:block;height:1.4em;line-height:1.4em;overflow:hidden;}
.cs-roll-in{display:block;transition:transform .9s var(--ease-io);}
.cs-roll-in span{display:block;height:1.4em;}
.cs-line{display:block;width:90px;height:1px;background:rgba(255,255,255,.28);position:relative;}
.cs-line i{position:absolute;left:0;top:0;bottom:0;background:#fff;width:0;transition:width .9s var(--ease-io);}

.cs-index{
  position:absolute;right:var(--pad);top:50%;transform:translateY(-50%);z-index:10;
  display:flex;flex-direction:column;gap:18px;align-items:flex-end;list-style:none;
}
.cs-index button{
  display:flex;align-items:center;gap:14px;background:none;border:none;color:rgba(255,255,255,.5);
  cursor:pointer;font-family:'Space Grotesk',sans-serif;font-size:13px;letter-spacing:.06em;
  transition:color .3s ease;
}
.cs-index .lbl{
  max-width:0;overflow:hidden;white-space:nowrap;opacity:0;
  transition:max-width .6s var(--ease-out),opacity .4s ease;
}
.cs-index .bar{display:block;width:18px;height:1px;background:currentColor;transition:width .5s var(--ease-out);}
.cs-index button:hover,.cs-index button.active{color:#fff;}
.cs-index button:hover .lbl{max-width:260px;opacity:1;}
.cs-index button.active .bar{width:44px;}

/* custom cursor */
.cs-cursor{
  position:fixed;left:0;top:0;width:46px;height:46px;margin:-23px 0 0 -23px;
  border:1px solid rgba(255,255,255,.8);border-radius:50%;pointer-events:none;z-index:400;
  opacity:0;mix-blend-mode:difference;
  transition:width .35s var(--ease-out),height .35s var(--ease-out),margin .35s var(--ease-out),background .3s ease,opacity .3s ease;
}
.cs-cursor.on{opacity:1;}
.cs-cursor.hover{width:86px;height:86px;margin:-43px 0 0 -43px;background:#fff;}

/* ---------- PROJECT VIEW (overlay) ---------- */
.pv{
  position:fixed;inset:0;z-index:300;
  background:var(--bg);color:var(--text);
  visibility:hidden;
  clip-path:circle(0px at var(--cx,50%) var(--cy,50%));
  transition:clip-path .95s var(--ease-io),visibility 0s linear .95s;
}
.pv.open{
  visibility:visible;
  clip-path:circle(150vmax at var(--cx,50%) var(--cy,50%));
  transition:clip-path 1.15s var(--ease-io),visibility 0s;
}
.pv-bar{
  position:absolute;top:0;left:0;right:0;height:var(--bar-h);z-index:6;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  padding:0 40px;background:var(--header-bg);border-bottom:1px solid var(--header-line);
  transform:translateY(-100%);
  transition:transform .6s var(--ease-out);
}
.pv.open .pv-bar{transform:none;transition-delay:.55s;}
.pv-close{
  justify-self:start;display:inline-flex;align-items:center;gap:12px;
  background:none;border:1px solid var(--line);border-radius:100px;
  padding:8px 22px 8px 8px;color:var(--text);cursor:pointer;
  font-family:'Inter',sans-serif;font-size:13px;letter-spacing:.08em;text-transform:uppercase;
  transition:background .3s ease,border-color .3s ease,color .3s ease;
}
.pv-close-icon{
  width:32px;height:32px;border-radius:50%;background:var(--text);color:var(--bg);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;
  transition:transform .5s var(--ease-out),background .3s ease,color .3s ease;
}
.pv-close:hover{background:var(--blue);border-color:var(--blue);color:#fff;}
.pv-close:hover .pv-close-icon{transform:rotate(180deg);background:#fff;color:var(--blue);}
.pv-bar-title{
  font-family:'Space Grotesk',sans-serif;font-size:14px;color:var(--muted);
  max-width:46vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.pv-bar-nav{justify-self:end;display:flex;gap:10px;}
.pv-bar-nav button{
  width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:none;color:var(--text);
  cursor:pointer;font-size:15px;transition:.3s var(--ease-out);
}
.pv-bar-nav button:hover{background:var(--blue);border-color:var(--blue);color:#fff;transform:scale(1.1);}
.pv-progress{position:absolute;left:0;bottom:-1px;height:2px;width:100%;background:var(--blue);transform:scaleX(var(--p,0));transform-origin:left;}

.pv-scroll{
  position:absolute;inset:0;overflow-y:auto;overflow-x:hidden;padding-top:var(--bar-h);
  overscroll-behavior:contain;
  transition:opacity .45s ease,transform .45s ease;
}
.pv-scroll.swapping{opacity:0;transform:translateY(30px);}

.pv-wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);}

/* hero */
.pv-hero{position:relative;height:calc(100vh - var(--bar-h));min-height:520px;overflow:hidden;color:#fff;}
.pv-hero-img{position:absolute;inset:0;}
.pv-hero-img img{width:100%;height:100%;object-fit:cover;transform:scale(1.25);transition:transform 0s;}
.pv.open .pv-hero-img img{transform:scale(1);transition:transform 2.4s var(--ease-out) .35s;}
.pv-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,8,14,.1),rgba(6,8,14,.82));}
.pv-hero-text{position:absolute;z-index:2;left:0;right:0;bottom:60px;}
.pv-hero-text .pv-wrap > *{position:relative;}
.pv-hero h1{
  font-size:clamp(36px,6vw,92px);line-height:1.03;letter-spacing:-.035em;max-width:1100px;color:#fff;
}
.pv-hero h1 .w > span{transform:translateY(112%);transition:transform 0s;}
.pv.open .pv-hero h1 .w > span{
  transform:none;transition:transform 1.1s var(--ease-out);transition-delay:calc(.85s + var(--i) * .07s);
}
.pv-hero .cs-meta{opacity:0;transform:translateY(16px);}
.pv.open .pv-hero .cs-meta{opacity:1;transform:none;transition:opacity .8s ease .75s,transform .8s var(--ease-out) .75s;}

/* generic reveal inside overlay */
.pv-rv{opacity:0;transform:translateY(40px);transition:opacity .9s ease,transform 1s var(--ease-out);transition-delay:var(--d,0s);}
.pv-rv.in{opacity:1;transform:none;}
.pv-img{overflow:hidden;border-radius:var(--radius);background:var(--card);}
.pv-img img{width:100%;height:100%;object-fit:cover;transform:scale(1.18);transition:transform 1.6s var(--ease-out);}
.pv-img.in img{transform:scale(1);}

/* meta row */
.pv-metarow{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;padding:60px 0;border-bottom:1px solid var(--line);}
.pv-metarow h6{font-family:'Inter',sans-serif;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:500;margin-bottom:10px;}
.pv-metarow p{font-size:16px;line-height:1.5;}

.pv-lead{
  font-family:'Space Grotesk',sans-serif;font-weight:500;letter-spacing:-.025em;
  font-size:clamp(24px,3.2vw,44px);line-height:1.22;max-width:1100px;padding:110px 0;
}
.pv-two{display:grid;grid-template-columns:1fr 1fr;gap:80px;padding:0 0 110px;}
.pv-two h3{font-size:22px;margin-bottom:18px;display:flex;align-items:center;gap:12px;}
.pv-two h3::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--blue);}
.pv-two p{color:var(--muted);font-size:16px;line-height:1.75;}

.pv-gallery{display:grid;grid-template-columns:1fr 1fr;gap:20px;padding-bottom:110px;}
.pv-gallery .full{grid-column:1 / -1;aspect-ratio:16/8;}
.pv-gallery .half{aspect-ratio:4/5;}

.pv-results{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:var(--line);margin-bottom:110px;border-radius:var(--radius);overflow:hidden;}
.pv-stat{background:var(--blue);padding:50px 40px;color:#fff;}
.pv-stat:nth-child(2){background:var(--blue-deep);}
.pv-stat:nth-child(3){background:var(--card);color:var(--text);}
.pv-stat b{display:block;font-family:'Space Grotesk',sans-serif;font-size:clamp(40px,5vw,72px);letter-spacing:-.03em;line-height:1;margin-bottom:10px;font-weight:600;}
.pv-stat span{font-size:14px;opacity:.8;}

.pv-quote{padding:0 0 130px;max-width:980px;}
.pv-quote blockquote{font-family:'Space Grotesk',sans-serif;font-size:clamp(24px,3vw,40px);line-height:1.25;letter-spacing:-.02em;margin-bottom:26px;}
.pv-quote .who{font-weight:600;}
.pv-quote .role{color:var(--muted);font-size:14px;}

/* next project */
.pv-next{
  display:block;width:100%;text-align:left;border:none;cursor:pointer;
  position:relative;height:72vh;min-height:420px;overflow:hidden;color:#fff;background:#0a0a0a;
}
.pv-next img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 1.4s var(--ease-out),opacity .6s ease;opacity:.8;}
.pv-next:hover img{transform:scale(1.07);opacity:.6;}
.pv-next::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(6,8,14,.85),rgba(6,8,14,.2));}
.pv-next .inner{position:absolute;z-index:2;left:0;right:0;bottom:70px;}
.pv-next .lab{display:block;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.7);margin-bottom:18px;}
.pv-next h2{font-size:clamp(34px,5.4vw,84px);letter-spacing:-.035em;line-height:1.04;max-width:1100px;display:flex;align-items:center;gap:30px;}
.pv-next h2 em{
  font-style:normal;flex-shrink:0;width:64px;height:64px;border-radius:50%;border:1px solid rgba(255,255,255,.5);
  display:inline-flex;align-items:center;justify-content:center;font-size:24px;
  transition:transform .6s var(--ease-out),background .3s ease,color .3s ease;
}
.pv-next:hover h2 em{transform:translateX(12px) rotate(-45deg);background:#fff;color:#111;}

/* ---------- RESPONSIVE ---------- */
@media(max-width:1080px){
  .pv-two{grid-template-columns:1fr;gap:40px;}
  .pv-metarow{grid-template-columns:1fr 1fr;}
  .cs-index{display:none;}
}
@media(max-width:760px){
  :root{--pad:22px;--bar-h:88px;}
  .cs-content{bottom:130px;}
  .cs-excerpt{font-size:15px;}
  .cs-scroll{display:none;}
  .cs-line{width:50px;}
  .pv-bar{padding:0 22px;}
  .pv-bar-title{display:none;}
  .pv-bar{grid-template-columns:1fr 1fr;}
  .pv-lead{padding:70px 0;}
  .pv-two{padding-bottom:70px;}
  .pv-gallery{grid-template-columns:1fr;padding-bottom:70px;}
  .pv-gallery .full{aspect-ratio:4/3;}
  .pv-results{grid-template-columns:1fr;margin-bottom:70px;}
  .pv-quote{padding-bottom:80px;}
  .pv-next h2 em{width:44px;height:44px;font-size:18px;}
  .cs-cursor{display:none;}
}
@media(pointer:coarse){.cs-cursor{display:none;}}
@media(prefers-reduced-motion:reduce){
  .cs-bg,.cs-par img,.pv,.pv-hero-img img{transition-duration:.01s !important;}
}

/* ---------- responsive refinements ---------- */
@supports(height:100dvh){body.cs-body{height:100dvh;}}
@media(max-height:700px){
  .cs-title{font-size:clamp(30px,5vw,64px);margin-bottom:16px;}
  .cs-excerpt{margin-bottom:22px;font-size:15px;}
  .cs-meta{margin-bottom:16px;}
  .cs-content{bottom:110px;}
}
@media(max-width:380px){
  .cs-title{font-size:32px;}
  .cs-ui{bottom:22px;}
}

/* =====================================================
   MOBILE READABILITY (<=760px)
   ===================================================== */
@media(max-width:760px){
  :root{--bar-h:88px;}
  .cs-content{left:22px;width:calc(100% - 44px);bottom:140px;}
  .cs-meta{margin-bottom:18px;gap:8px;}
  .cs-tag{font-size:14px;padding:7px 14px;letter-spacing:.07em;}
  .cs-date{font-size:16px;color:rgba(255,255,255,.88);margin-left:4px;}
  .cs-title{font-size:clamp(36px,10.5vw,50px);line-height:1.06;margin-bottom:18px;}
  .cs-excerpt{font-size:18px;line-height:1.55;color:rgba(255,255,255,.94);max-width:none;margin-bottom:24px;}
  .cs-show{font-size:17px;padding:16px 26px;}
  .cs-show .btn-arrow{width:30px;height:30px;font-size:15px;}
  .cs-ui{bottom:26px;}
  .cs-count{font-size:20px;gap:14px;}
  .cs-line{width:64px;}

  /* project detail: half-height hero so the title + content show immediately */
  .pv-bar-title{display:none;}
  .pv-close{font-size:14px;}
  .pv-bar-nav button{width:48px;height:48px;font-size:18px;}
  .pv-hero{height:calc((100dvh - var(--bar-h)) / 2);min-height:340px;}
  .pv-hero-text{bottom:26px;}
  .pv-hero h1{font-size:clamp(30px,9vw,42px);line-height:1.08;}
  .pv-hero .cs-meta{margin-bottom:14px;}
  .pv-metarow{grid-template-columns:1fr;padding:34px 0;gap:22px;}
  .pv-metarow h6{font-size:14px;margin-bottom:6px;}
  .pv-metarow p{font-size:19px;}
  .pv-lead{font-size:25px;line-height:1.35;padding:44px 0;}
  .pv-two{gap:30px;padding-bottom:52px;}
  .pv-two h3{font-size:27px;}
  .pv-two p{font-size:18px;line-height:1.7;color:#3a3a3a;}
  .pv-gallery{gap:14px;padding-bottom:52px;}
  .pv-results{margin-bottom:52px;}
  .pv-stat{padding:32px 26px;}
  .pv-stat b{font-size:56px;}
  .pv-stat span{font-size:18px;opacity:.95;}
  .pv-quote{padding-bottom:64px;}
  .pv-quote blockquote{font-size:27px;line-height:1.3;}
  .pv-quote .who{font-size:19px;}
  .pv-quote .role{font-size:16px;}
  .pv-next{height:56vh;min-height:360px;}
  .pv-next .lab{font-size:14px;}
  .pv-next h2{font-size:32px;gap:16px;}
}
@media(max-width:380px){
  .cs-title{font-size:34px;}
  .cs-excerpt{font-size:17px;}
}
@media(max-width:760px) and (max-height:700px){
  .cs-excerpt{font-size:16px;margin-bottom:16px;}
  .cs-title{font-size:32px;margin-bottom:12px;}
  .cs-content{bottom:120px;}
}