/* =========================================================
   ABOUT PAGE
   Origin timeline + framed slideshow (sticky) + flip cards
   ========================================================= */

/* HERO */
.about-hero{padding:180px 0 100px;position:relative;z-index:1}
.about-hero__inner{padding:0 var(--pad-x);max-width:1400px;margin:0 auto}
.about__alter{
  font-family:var(--f-display);font-weight:800;
  font-size:clamp(40px,6.5vw,116px);
  line-height:1;letter-spacing:-.05em;
  max-width:15ch;color:var(--text);
}
.about__alter .grad-text{font-weight:800}

/* SPLIT */
.about-split{padding:0 0 var(--section-y);position:relative;z-index:1}
.split__inner{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  gap:clamp(48px,6vw,110px);
  width:100%;max-width:1400px;margin:0 auto;
  padding:0 var(--pad-x);align-items:start;
}
@media(max-width:960px){.split__inner{grid-template-columns:1fr;gap:72px}}

/* ORIGIN (left) */
.origin{padding-top:16px}
.origin__eyebrow{
  font-family:var(--f-body);font-size:11px;
  letter-spacing:.24em;text-transform:uppercase;
  color:var(--muted);margin-bottom:72px;
  display:flex;align-items:center;gap:14px;
}
.origin__eyebrow::before{content:"";width:32px;height:1px;background:var(--text)}

.origin__chapters{display:flex;flex-direction:column;gap:72px}
@media(max-width:700px){.origin__chapters{gap:56px}}

.chapter{
  display:grid;grid-template-columns:56px minmax(0,1fr);
  gap:24px;align-items:start;
}
.chapter__num{
  font-family:var(--f-body);font-size:11px;
  letter-spacing:.22em;color:var(--muted);padding-top:10px;
}
.chapter__body{max-width:52ch}
.chapter__head{
  font-family:var(--f-display);font-weight:700;
  font-size:clamp(22px,2.2vw,32px);
  line-height:1.15;letter-spacing:-.03em;
  color:var(--text);margin-bottom:14px;
}
.chapter__head .grad-text{font-weight:700}
.chapter__line{
  font-family:var(--f-body);font-size:clamp(15px,1.15vw,17px);
  line-height:1.7;color:var(--muted);
}

.origin__closing{
  margin-top:120px;
  font-family:var(--f-display);font-weight:800;
  font-size:clamp(32px,4.2vw,64px);
  line-height:1.05;letter-spacing:-.045em;
  color:var(--text);max-width:14ch;
}
.origin__closing .grad-text{
  font-weight:800;font-style:italic;font-size:1.06em;
}

/* SLIDESHOW (right, sticky) */
.slideshow-sticky{
  position:sticky;top:120px;align-self:start;
}
@media(max-width:960px){.slideshow-sticky{position:static;top:auto}}

.slideshow-sticky__inner{
  display:flex;align-items:center;justify-content:center;
}

.slideshow-frame{
  position:relative;
  background:#F7F3EA;
  padding:16px 16px 56px;
  box-shadow:
    0 1px 2px rgba(0,0,0,.06),
    0 12px 40px rgba(0,0,0,.12),
    0 40px 80px rgba(0,0,0,.08);
  width:100%;
  max-width:460px;
  transform:rotate(-1.6deg);
  transition:transform .8s var(--ease-out);
}
.slideshow-frame:hover{transform:rotate(0deg) scale(1.01)}

/* Washi tape corners */
.slideshow-frame__tape{
  position:absolute;width:78px;height:22px;
  background:linear-gradient(135deg,rgba(255,176,136,.55),rgba(199,168,255,.55));
  box-shadow:0 2px 6px rgba(0,0,0,.08);
  opacity:.85;
  pointer-events:none;
}
.slideshow-frame__tape--tl{
  top:-8px;left:-14px;
  transform:rotate(-24deg);
}
.slideshow-frame__tape--tr{
  top:-8px;right:-14px;
  transform:rotate(24deg);
}

.slideshow{
  position:relative;
  width:100%;
  aspect-ratio:4/5;
  overflow:hidden;
  background:#E8E2D4;
}
.slide{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-fit:cover;
  opacity:0;
  transform:scale(1.06);
  transition:opacity 1.4s var(--ease-out), transform 1.6s var(--ease-out);
  will-change:opacity,transform;
}
.slide.is-active{
  opacity:1;
  transform:scale(1);
}

.slideshow-frame__caption{
  position:absolute;
  bottom:18px;left:16px;right:16px;
  display:flex;align-items:center;gap:10px;
  font-family:var(--f-body);font-size:10px;
  letter-spacing:.22em;text-transform:uppercase;
  color:var(--muted);
}
.slideshow-frame__caption-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--grad);
  box-shadow:0 0 10px rgba(255,107,53,.6);
  animation:pulseDot 2s ease-in-out infinite;
}
@keyframes pulseDot{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.5;transform:scale(.85)}
}

/* FLIP CARDS — scattered */
.cards{
  padding:var(--section-y) var(--pad-x);
  position:relative;z-index:1;
}
.cards__header{
  max-width:900px;margin-bottom:clamp(96px,12vh,160px);
}
.cards__eyebrow{
  font-family:var(--f-body);font-size:11px;
  letter-spacing:.24em;text-transform:uppercase;
  color:var(--muted);margin-bottom:28px;
  display:flex;align-items:center;gap:14px;
}
.cards__eyebrow::before{content:"";width:32px;height:1px;background:var(--text)}
.cards__title{
  font-family:var(--f-display);font-weight:800;
  font-size:clamp(40px,6.5vw,96px);
  line-height:.98;letter-spacing:-.045em;
  max-width:16ch;margin-bottom:28px;
}
.cards__hint{
  font-family:var(--f-body);
  font-size:clamp(15px,1.3vw,18px);
  line-height:1.75;color:var(--muted);
  max-width:44ch;
}

/* Stage — loose scatter on desktop, grid on mobile */
.cards__stage{
  position:relative;
  width:100%;
  min-height:130vh;
  margin-bottom:80px;
}
@media(max-width:900px){
  .cards__stage{
    min-height:auto;
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:14px;
  }
}

.card{
  position:absolute;
  cursor:none;
  perspective:1000px;
  will-change:transform;
}
@media(max-width:900px){
  .card{position:static;width:100%!important;height:auto!important;transform:none!important}
}

.card__inner{
  position:relative;width:100%;height:100%;
  transform-style:preserve-3d;
  transition:transform .9s cubic-bezier(.55,0,.3,1);
  will-change:transform;
}
.card.flipped .card__inner{transform:rotateY(180deg)}

.card__face{
  position:absolute;inset:0;
  border-radius:4px;
  border:1.5px solid var(--text);
  background:linear-gradient(180deg,#F7F7F7,#EDEDED);
  padding:22px 20px;
  display:flex;flex-direction:column;justify-content:space-between;
  backface-visibility:hidden;-webkit-backface-visibility:hidden;
  overflow:hidden;
  transition:border-color .35s,box-shadow .45s,transform .35s;
}
.card:hover .card__face{
  box-shadow:6px 6px 0 0 var(--text);
  transform:translate(-2px,-2px);
}
.card.flipped:hover .card__face{
  box-shadow:6px 6px 0 0 #FF6B35;
}

.card__face--back{
  transform:rotateY(180deg);
  border-color:#FF6B35;
  background:
    radial-gradient(circle at 20% 80%,rgba(255,107,53,.12),transparent 60%),
    radial-gradient(circle at 80% 20%,rgba(0,102,255,.10),transparent 60%),
    #EDEDED;
}

.card__num{
  font-family:var(--f-body);font-size:10px;
  letter-spacing:.22em;text-transform:uppercase;
  color:var(--muted);
}
.card__q{
  font-family:var(--f-display);font-weight:700;
  font-size:clamp(14px,1.15vw,17px);
  line-height:1.22;letter-spacing:-.02em;
  color:var(--text);margin:auto 0;
}
.card__a{
  font-family:var(--f-body);font-weight:500;
  font-size:clamp(12px,.98vw,14px);
  line-height:1.55;color:var(--text-2);
  margin:auto 0;
}
.card__hint{
  font-family:var(--f-body);font-size:9px;
  letter-spacing:.24em;text-transform:uppercase;
  color:var(--muted);
  display:flex;align-items:center;gap:8px;
}
.card__hint::after{
  content:"";flex:1;height:1px;
  background:linear-gradient(to right,var(--line-2),transparent);
}
.card.flipped .card__hint{color:#FF6B35}
.card.flipped .card__hint::after{
  background:linear-gradient(to right,#FF6B35,transparent);
}

/* Scattered positions (desktop only) */
.card[data-i="0"]{top:0%;    left:1%;  width:240px;height:320px;transform:rotate(-6deg)}
.card[data-i="1"]{top:8%;    left:26%; width:250px;height:330px;transform:rotate(3deg)}
.card[data-i="2"]{top:-3%;   left:54%; width:220px;height:300px;transform:rotate(-9deg)}
.card[data-i="3"]{top:44%;   left:12%; width:250px;height:330px;transform:rotate(7deg)}
.card[data-i="4"]{top:52%;   left:42%; width:230px;height:310px;transform:rotate(-5deg)}
.card[data-i="5"]{top:40%;   left:72%; width:260px;height:340px;transform:rotate(10deg)}

.card:hover{transform:rotate(0deg) scale(1.03)!important;z-index:10}

.cards__counter{
  text-align:center;
  font-family:var(--f-body);font-size:12px;
  letter-spacing:.22em;text-transform:uppercase;
  color:var(--muted);
  margin-top:40px;
}
.cards__counter span{
  color:var(--text);font-weight:600;
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
  font-size:14px;
}
.cards__counter.complete{color:var(--text)}

/* COLLAB */
.collab{
  padding:var(--section-y) var(--pad-x);
  position:relative;z-index:1;text-align:center;
}
.collab__inner{max-width:1000px;margin:0 auto}
.collab__title{
  font-family:var(--f-display);font-weight:900;
  font-size:clamp(64px,13vw,220px);
  line-height:.85;letter-spacing:-.06em;
  margin-bottom:clamp(32px,5vh,56px);
}
.collab__title .grad-text{background-size:200% 200%}
.collab__line{
  font-family:var(--f-body);
  font-size:clamp(15px,1.3vw,19px);
  line-height:1.7;color:var(--muted);
  max-width:44ch;margin:0 auto;
}
.collab__links{
  margin-top:clamp(48px,7vh,72px);
  display:flex;justify-content:center;align-items:center;
  gap:22px;flex-wrap:wrap;
  font-family:var(--f-display);font-weight:600;font-size:14px;
}
.collab__links a{
  color:var(--text-2);position:relative;padding:6px 0;
  transition:color .3s;
}
.collab__links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;
  height:1.5px;background:var(--grad-h);background-size:200% 100%;
  animation:gradShift 4s linear infinite;
  transform:scaleX(0);transform-origin:left;
  transition:transform .5s var(--ease-out);
}
.collab__links a:hover{color:var(--text)}
.collab__links a:hover::after{transform:scaleX(1)}
.collab__dot{color:var(--muted-2)}

@media(max-width:600px){
  .chapter{grid-template-columns:36px 1fr;gap:14px}
  .chapter__num{padding-top:8px;font-size:10px}
  .slideshow-frame{max-width:100%;padding:12px 12px 44px}
}


/* ABOUT — MOBILE */
@media (max-width: 900px) {
  .about-hero { padding: 100px 0 40px; }
  .about-hero__inner { padding: 0 var(--pad-x); }
  .about__alter { font-size: clamp(30px, 8.5vw, 46px); line-height: 1.05; }

  .split__inner { grid-template-columns: 1fr !important; gap: 56px; }
  .slideshow-sticky { position: static !important; top: auto !important; }
  .slideshow-sticky__inner { padding: 0; }
  .slideshow-frame { transform: rotate(0) !important; max-width: 100%; padding: 10px 10px 40px; }
  .slideshow-frame:hover { transform: rotate(0) !important; }
  .slideshow-frame__tape--tl { top: -6px; left: -8px; width: 56px; height: 16px; }
  .slideshow-frame__tape--tr { top: -6px; right: -8px; width: 56px; height: 16px; }
  .slideshow-frame__caption { bottom: 12px; left: 10px; right: 10px; font-size: 9px; }

  .origin { padding-top: 0; }
  .origin__eyebrow { margin-bottom: 40px; }
  .origin__chapters { gap: 48px; }
  .chapter { grid-template-columns: 36px 1fr; gap: 14px; }
  .chapter__num { padding-top: 6px; font-size: 10px; }
  .chapter__head { font-size: clamp(20px, 5vw, 26px); margin-bottom: 10px; }
  .chapter__line { font-size: 14px; line-height: 1.65; }
  .origin__closing { margin-top: 72px; font-size: clamp(28px, 7vw, 40px); }

  .cards { padding: 90px var(--pad-x) 80px; }
  .cards__header { margin-bottom: 48px; }
  .cards__title { font-size: clamp(30px, 8vw, 44px); }
  .cards__hint { font-size: 14px; }
  .cards__stage {
    position: static !important; min-height: auto !important;
    display: grid !important; grid-template-columns: repeat(2, 1fr) !important;
    gap: 10px !important; margin-bottom: 40px;
  }
  .card {
    position: static !important; width: auto !important; height: auto !important;
    transform: none !important; aspect-ratio: 3/4;
  }
  .card:hover { transform: none !important; z-index: auto !important; }
  .card__face { padding: 14px 12px; border-radius: 4px; }
  .card__num { font-size: 9px; letter-spacing: .18em; }
  .card__q { font-size: 12px; line-height: 1.3; font-weight: 600; }
  .card__a { font-size: 11px; line-height: 1.45; }
  .card__hint { font-size: 8px; letter-spacing: .2em; }
  .cards__counter { font-size: 11px; margin-top: 20px; }

  .collab { padding: 100px var(--pad-x) 120px; }
  .collab__title { font-size: clamp(56px, 18vw, 120px); }
  .collab__line { font-size: 15px; }
  .collab__links { gap: 16px; font-size: 13px; }
}