: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(212, 175, 55, 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: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 400;
  color: #0a0a0a;
  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: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  color: #0a0a0a;
  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, 0.04);
}

/* 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: var(--font-display);
  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)
  }
}