:root{
  --ink:#14120F;
  --paper:#F4EFE4;
  --signal:#FF4423;
  --stone:#A39C8E;
  --line:rgba(244,239,228,.14);
}

*{margin:0;padding:0;box-sizing:border-box;font-family:'Inter',sans-serif;}

body{
  background:var(--ink);
  color:var(--paper);
  min-height:100vh;
  padding:60px 20px;
}

h1,h3{font-family:'Fraunces',serif;font-weight:500;}

.back-link{
  position:fixed;
  top:24px;
  left:24px;
  color:var(--stone);
  text-decoration:none;
  font-family:'Space Mono',monospace;
  font-size:13px;
}
.back-link:hover{color:var(--paper);}

.demo-container{
  max-width:820px;
  margin:auto;
  text-align:center;
}

.eyebrow{
  display:inline-block;
  font-family:'Space Mono',monospace;
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--signal);
  border:1px solid var(--line);
  padding:8px 16px;
  border-radius:999px;
  margin-bottom:26px;
}

h1{font-size:clamp(2rem,5vw,2.8rem);margin-bottom:16px;}

.subtitle{color:var(--stone);margin-bottom:12px;}

.flow-text{
  font-family:'Space Mono',monospace;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--signal);
  margin-bottom:48px;
}

.upload-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:24px;
  margin-bottom:36px;
}

.upload-card{
  background:#1B1712;
  padding:26px;
  border-radius:8px;
  border:1px solid var(--line);
}

.upload-label{
  display:block;
  font-family:'Space Mono',monospace;
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--stone);
  margin-bottom:14px;
}

.upload-card img{
  width:100%;
  height:280px;
  object-fit:cover;
  border-radius:6px;
  display:none;
  margin-top:16px;
}

.btn-primary{
  background:var(--signal);
  border:none;
  color:var(--paper);
  padding:16px 34px;
  font-size:16px;
  font-weight:600;
  border-radius:4px;
  cursor:pointer;
  transition:.25s ease;
}
.btn-primary:hover{
  transform:translateY(-3px);
  box-shadow:0 12px 26px rgba(255,68,35,.28);
}

.upload-btn{
  display:inline-block;
  background:transparent;
  border:1px solid var(--line);
  color:var(--paper);
  padding:13px 22px;
  border-radius:4px;
  font-weight:500;
  font-size:14px;
  cursor:pointer;
  transition:.25s ease;
}
.upload-btn:hover{
  border-color:var(--paper);
}

#loading{
  display:none;
  margin-top:40px;
  font-family:'Space Mono',monospace;
  font-size:14px;
  color:var(--signal);
}

#resultSection{
  display:none;
  margin-top:50px;
  background:#1B1712;
  padding:30px;
  border-radius:8px;
  border:1px solid var(--signal);
}

#resultPreview{
  width:100%;
  max-width:640px;
  border-radius:8px;
  margin-top:10px;
}

.result-note{
  margin-top:16px;
  color:var(--stone);
  font-size:13px;
}

@media(max-width:768px){
  h1{font-size:2rem;}
  .upload-card img{height:220px;}
}