html.project-transition-lock,
body.project-transition-lock {
  overflow: hidden !important;
}

.project-demo-back {
  position: fixed;
  z-index: 2147483000;
  top: max(1rem, env(safe-area-inset-top));
  left: max(1rem, env(safe-area-inset-left));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  min-height: 2.7rem;
  padding: .68rem 1rem;
  border-radius: 999px;
  border: 2px solid rgba(255, 248, 238, .82);
  background: rgba(35, 35, 41, .74);
  color: #fff8ee !important;
  font: 900 .9rem/1.1 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: .01em;
  text-decoration: none !important;
  box-shadow: 0 18px 44px rgba(0, 0, 0, .28), inset 0 1px 0 rgba(255,255,255,.18);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.project-demo-back:hover { transform: translateY(-1px); }
.project-demo-back.secure {
  width: 2.75rem;
  min-width: 2.75rem;
  padding: 0;
  gap: 0;
  border-color: rgba(32, 211, 194, .46);
  background:
    linear-gradient(135deg, rgba(11, 22, 38, .94), rgba(16, 28, 46, .86)),
    radial-gradient(circle at 15% 15%, rgba(32, 211, 194, .18), transparent 42%);
  color: #ecfffb !important;
  font-size: 0;
  font-family: "Plus Jakarta Sans", Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 800;
  box-shadow: 0 16px 42px rgba(0, 0, 0, .34), inset 0 1px 0 rgba(255,255,255,.12);
  text-shadow: 0 1px 10px rgba(32, 211, 194, .24);
}
.project-demo-back.secure::before {
  content: "←";
  font-size: 1.12rem;
  line-height: 1;
}
.project-demo-back.secure:hover {
  border-color: rgba(32, 211, 194, .7);
  background:
    linear-gradient(135deg, rgba(12, 30, 48, .96), rgba(18, 39, 62, .9)),
    radial-gradient(circle at 15% 15%, rgba(32, 211, 194, .22), transparent 42%);
}
.project-demo-back.secure:focus-visible {
  outline: 3px solid rgba(32, 211, 194, .38);
  outline-offset: 3px;
}
@media (min-width: 1500px) {
  .project-demo-back.secure {
    width: auto;
    min-width: 0;
    padding: .68rem 1rem;
    gap: .45rem;
    font-size: .9rem;
  }
  .project-demo-back.secure::before { content: none; }
}

.project-transition-overlay {
  position: fixed;
  inset: 0;
  z-index: 2147483646;
  display: grid;
  place-items: center;
  pointer-events: none;
  overflow: hidden;
  color: #fff8ee;
  background: #211819;
  opacity: 1;
  animation: projectOverlayIn .16s ease-out both;
}
.project-transition-overlay::before,
.project-transition-overlay::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.project-transition-overlay::before {
  opacity: .22;
  background-image:
    linear-gradient(rgba(255,248,238,.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,248,238,.12) 1px, transparent 1px);
  background-size: 44px 44px;
}
.project-transition-overlay::after {
  opacity: .55;
  background: linear-gradient(135deg, rgba(155,44,44,.35), transparent 48%), linear-gradient(245deg, rgba(254,243,199,.16), transparent 46%);
}
.project-transition-stage {
  position: relative;
  z-index: 1;
  width: min(24rem, 84vw);
  height: min(18rem, 58vw);
  min-height: 16rem;
  display: grid;
  place-items: center;
  animation: projectStageIn .56s cubic-bezier(.16,1,.3,1) both;
}
.project-transition-title {
  position: absolute;
  left: 50%;
  bottom: .65rem;
  transform: translateX(-50%);
  width: max-content;
  max-width: 90vw;
  font: 1000 1.7rem/1 "Nunito Sans", system-ui, sans-serif;
  letter-spacing: 0;
  text-shadow: 0 12px 26px rgba(0,0,0,.26);
}

.project-transition-overlay.project-securedoc-combined {
  background: #211819;
}

.sd-simple-transition,
.sd-simple-paper,
.sd-simple-check {
  position: absolute;
}
.sd-simple-transition {
  left: 50%;
  top: 42%;
  width: 14rem;
  height: 12rem;
  transform: translate(-50%, -50%);
}
.sd-simple-paper {
  width: 8.4rem;
  height: 10.6rem;
  left: 50%;
  top: 50%;
  border: 3px solid rgba(255,248,238,.9);
  border-radius: .85rem;
  background: rgba(250,247,245,.9);
  box-shadow: 0 22px 44px rgba(0,0,0,.26);
  transform-origin: center;
}
.sd-simple-paper.back {
  opacity: .52;
  filter: saturate(.9);
}
.sd-simple-paper.left {
  transform: translate(-72%, -48%) rotate(-10deg) scale(.94);
  animation: sdPaperLeft .58s cubic-bezier(.16,1,.3,1) both;
}
.sd-simple-paper.right {
  transform: translate(-28%, -48%) rotate(10deg) scale(.94);
  animation: sdPaperRight .58s cubic-bezier(.16,1,.3,1) both;
}
.sd-simple-paper.main {
  z-index: 2;
  transform: translate(-50%, -48%) scale(.9);
  animation: sdPaperMain .58s .06s cubic-bezier(.16,1,.3,1) both;
}
.sd-simple-paper.main span {
  position: absolute;
  left: 1.1rem;
  right: 1.1rem;
  height: .58rem;
  border-radius: 999px;
  background: #9b2c2c;
}
.sd-simple-paper.main span:nth-child(1) { top: 1.35rem; }
.sd-simple-paper.main span:nth-child(2) { top: 2.65rem; opacity: .38; }
.sd-simple-paper.main span:nth-child(3) { top: 3.95rem; opacity: .24; }
.sd-simple-paper.main i {
  position: absolute;
  left: 1.1rem;
  right: 1.1rem;
  bottom: 1.15rem;
  height: 1.7rem;
  border-radius: .55rem;
  background: rgba(155,44,44,.12);
}
.sd-simple-check {
  z-index: 3;
  left: 50%;
  top: 50%;
  width: 4.35rem;
  height: 4.35rem;
  display: grid;
  place-items: center;
  border: 3px solid #fff8ee;
  border-radius: 50%;
  background: #9b2c2c;
  box-shadow: 0 16px 32px rgba(0,0,0,.24);
  transform: translate(1.8rem, -.3rem) scale(.72);
  opacity: 0;
  animation: sdCheckIn .46s .28s cubic-bezier(.16,1,.3,1) both;
}
.sd-simple-check::before {
  content: "";
  width: 1.55rem;
  height: .82rem;
  border: solid #fef3c7;
  border-width: 0 0 .36rem .36rem;
  transform: translateY(-.08rem) rotate(-45deg);
}

.project-transition-overlay.mode-to-portfolio .project-transition-stage { animation: projectReverse .82s cubic-bezier(.2,.8,.2,1) both; }
@keyframes projectOverlayIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes projectStageIn { from { opacity: 0; transform: translateY(.7rem) scale(.97); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes sdPaperLeft { from { opacity: 0; transform: translate(-60%, -42%) rotate(-4deg) scale(.9); } to { opacity: .52; transform: translate(-72%, -48%) rotate(-10deg) scale(.94); } }
@keyframes sdPaperRight { from { opacity: 0; transform: translate(-40%, -42%) rotate(4deg) scale(.9); } to { opacity: .52; transform: translate(-28%, -48%) rotate(10deg) scale(.94); } }
@keyframes sdPaperMain { from { opacity: 0; transform: translate(-50%, -42%) scale(.9); } to { opacity: 1; transform: translate(-50%, -48%) scale(1); } }
@keyframes sdCheckIn { to { opacity: 1; transform: translate(1.8rem, -.3rem) scale(1); } }
@keyframes projectReverse { 0%{ opacity:1; transform:scale(1); filter:none; } 100%{ opacity:0; transform:scale(.86) translateY(1.8rem); filter:blur(8px); } }
@media (max-width: 700px) {
  .project-transition-stage { width: 84vw; height: 17rem; }
  .project-transition-title { font-size: 1.35rem; }
  .sd-simple-transition { width: 12rem; height: 10.8rem; }
  .sd-simple-paper { width: 7rem; height: 9rem; }
  .sd-simple-check { width: 3.65rem; height: 3.65rem; transform: translate(1.35rem, -.15rem) scale(.72); }
  @keyframes sdCheckIn { to { opacity: 1; transform: translate(1.35rem, -.15rem) scale(1); } }
  html.project-transition-lock,
body.project-transition-lock {
  overflow: hidden !important;
}

.project-demo-back { top: .75rem; left: .75rem; padding: .62rem .86rem; font-size: .82rem; }
}
@media (prefers-reduced-motion: reduce) { .project-transition-overlay { display:none !important; } }