:root{
  --gold:#b8860b;--gold-light:#d4a017;--gold-dark:#8b6508;
  --folder-color:#d4a017;--folder-back-color:#c49010;
  --paper-1:#fff8e8;--paper-2:#fdf0cc;--paper-3:#fbe8b0;
}

.pj-section{
  padding:60px 0 80px;
  background:#ffffff;
  position:relative;
  overflow:hidden;
}
.pj-section::before{
  content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:900px;height:500px;
  background:radial-gradient(ellipse,rgba(180,134,0,0.06) 0%,transparent 65%);
  pointer-events:none;
}
.pj-container{max-width:1160px;margin:0 auto;padding:0 28px}
.pj-header{text-align:center;margin-bottom:48px}
.pj-label{
  display:inline-flex;align-items:center;gap:10px;
  font-size:10.5px;font-weight:500;letter-spacing:0.2em;text-transform:uppercase;
  color:var(--gold);margin-bottom:14px;
}
.pj-label::before,.pj-label::after{content:'';display:block;width:24px;height:1px;background:var(--gold);opacity:0.6}
.pj-title{
  font-family:sans-serif;
  font-size:clamp(1.6rem,3.5vw,2.4rem);
  font-weight:800;color:#111;
  letter-spacing:-0.025em;line-height:1.1;
  margin-bottom:10px;
}
.pj-subtitle{font-size:0.9rem;color:rgba(0,0,0,0.4);max-width:400px;margin:0 auto;line-height:1.7}
.pj-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:36px 20px;
}
.pj-item{
  display:flex;flex-direction:column;align-items:center;gap:14px;
}
.folder-wrap{position:relative;display:flex;flex-direction:column;align-items:center}
.folder{
  transition:all 0.2s ease-in;
  cursor:pointer;position:relative;
  width:110px;height:88px;
}
.folder:not(.open):hover{transform:translateY(-8px)}
.folder:not(.open):hover .paper{transform:translate(-50%,0%)}
.folder:not(.open):hover .folder__front{transform:skew(15deg) scaleY(0.6)}
.folder:not(.open):hover .right{transform:skew(-15deg) scaleY(0.6)}
.folder.open{transform:translateY(-8px)}
.folder.open .paper:nth-child(1){transform:translate(-125%,-75%) rotateZ(-15deg)}
.folder.open .paper:nth-child(2){transform:translate(15%,-72%) rotateZ(15deg);height:80%}
.folder.open .paper:nth-child(3){transform:translate(-50%,-105%) rotateZ(5deg);height:80%}
.folder.open .folder__front{transform:skew(15deg) scaleY(0.6)}
.folder.open .right{transform:skew(-15deg) scaleY(0.6)}
.folder__back{
  position:relative;width:110px;height:88px;
  background:var(--folder-back-color);
  border-radius:0 10px 10px 10px;
  box-shadow:0 2px 12px rgba(180,134,0,0.15);
}
.folder__back::after{
  position:absolute;z-index:0;bottom:98%;left:0;
  content:'';width:34px;height:11px;
  background:var(--folder-back-color);
  border-radius:5px 5px 0 0;
}
.paper{
  position:absolute;z-index:2;
  bottom:10%;left:50%;
  transform:translate(-50%,10%);
  width:72%;height:82%;
  background:var(--paper-1);
  border-radius:8px;
  transition:all 0.3s ease-in-out;
  overflow:hidden;
}
.paper:nth-child(2){background:var(--paper-2);width:82%;height:72%}
.paper:nth-child(3){background:var(--paper-3);width:92%;height:62%}
.paper img{width:100%;height:100%;object-fit:cover;border-radius:8px;display:block}
.folder__front{
  position:absolute;z-index:3;
  width:100%;height:100%;
  border-radius:5px 10px 10px 10px;
  transform-origin:bottom;
  transition:all 0.3s ease-in-out;
  background:linear-gradient(160deg,var(--gold-light) 0%,var(--gold) 50%,var(--gold-dark) 100%);
}
.folder__front::before{
  content:'';position:absolute;top:0;left:0;right:0;bottom:0;
  background:linear-gradient(135deg,rgba(255,255,255,0.22) 0%,transparent 60%);
  border-radius:inherit;pointer-events:none;
}
.folder__front::after{
  content:'';position:absolute;top:8px;right:10px;
  width:5px;height:5px;border-radius:50%;
  background:rgba(255,255,255,0.5);
}
.right{
  position:absolute;z-index:3;right:0;top:0;
  width:50%;height:100%;
  border-radius:0 10px 10px 0;
  transform-origin:bottom;
  transition:all 0.3s ease-in-out;
  background:linear-gradient(160deg,rgba(150,110,0,0.25),rgba(100,75,0,0.35));
}
.pj-name{
  font-family:sans-serif;
  font-size:0.8rem;font-weight:700;
  color:#1a1a1a;text-align:center;line-height:1.3;
  transition:color 0.3s ease;
}
.pj-item:hover .pj-name{color:var(--gold)}
.pj-tag{
  font-size:0.63rem;font-weight:500;
  letter-spacing:0.08em;text-transform:uppercase;
  color:rgba(0,0,0,0.38);
  padding:2px 8px;border-radius:100px;
  border:1px solid rgba(0,0,0,0.1);
  background:rgba(0,0,0,0.03);
}

/* modal overlay */
.pj-modal-overlay{
  display:none;position:fixed;inset:0;z-index:9999;
  background:rgba(0,0,0,0.5);
  backdrop-filter:blur(4px);
  align-items:center;justify-content:center;
  padding:24px;
}
.pj-modal-overlay.show{display:flex}
.pj-modal{
  background:#fff;
  border:1px solid rgba(0,0,0,0.1);
  border-radius:20px;padding:32px;
  max-width:680px;width:100%;
  position:relative;
  box-shadow:0 8px 40px rgba(0,0,0,0.12);
  animation:modal-in 0.3s cubic-bezier(0.4,0,0.2,1);
}
@keyframes modal-in{
  from{opacity:0;transform:scale(0.93) translateY(14px)}
  to{opacity:1;transform:scale(1) translateY(0)}
}
.pj-modal-close{
  position:absolute;top:16px;right:16px;
  width:30px;height:30px;border-radius:50%;
  background:rgba(0,0,0,0.05);
  border:1px solid rgba(0,0,0,0.1);
  color:rgba(0,0,0,0.4);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;font-size:0.8rem;
  transition:all 0.2s ease;
}
.pj-modal-close:hover{background:rgba(184,134,11,0.1);border-color:var(--gold);color:var(--gold)}
.pj-modal-title{
  font-family:sans-serif;
  font-size:1.25rem;font-weight:800;color:#111;margin-bottom:4px;
}
.pj-modal-cat{
  font-size:0.7rem;color:var(--gold);
  text-transform:uppercase;letter-spacing:0.12em;
  margin-bottom:18px;display:block;
}
.pj-modal-imgs{
  display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:18px;
}
.pj-modal-img{
  border-radius:10px;overflow:hidden;
  border:1px solid rgba(0,0,0,0.08);
  aspect-ratio:4/3;
}
.pj-modal-img .img-ph{
  width:100%;height:100%;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  background:#f5f5f2;
}
.pj-modal-img .img-ph span{font-size:0.68rem;color:rgba(0,0,0,0.3);text-align:center;padding:0 8px}
.pj-modal-desc{font-size:0.83rem;color:rgba(0,0,0,0.5);line-height:1.7;margin-bottom:18px}
.pj-modal-tech{display:flex;flex-wrap:wrap;gap:6px}
.pj-modal-tech span{
  font-size:0.66rem;font-weight:500;letter-spacing:0.06em;
  padding:3px 10px;border-radius:100px;
  background:rgba(184,134,11,0.07);
  border:1px solid rgba(184,134,11,0.2);
  color:rgba(139,100,8,0.9);
}
@media(max-width:540px){.pj-grid{grid-template-columns:repeat(2,1fr)}}