*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0a0a0b;
  --bg-card:#121213;
  --bg-card-hover:#1a1a1d;
  --border:#222226;
  --border-active:#555559;
  --text:#e8e8ea;
  --text-dim:#78787d;
  --text-muted:#555559;
  --accent:#c8a86e;
  --accent-glow:rgba(200,168,110,0.15);
  --accent-dim:rgba(200,168,110,0.08);
  --danger:#e04a4a;
  --radius:12px;
  --radius-sm:8px;
  --transition:200ms ease;
}
html{height:100%}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--bg);
  color:var(--text);
  min-height:100%;
  -webkit-font-smoothing:antialiased;
}
.app{max-width:920px;margin:0 auto;padding:40px 24px 80px}
.header{text-align:center;margin-bottom:48px}
.header-title{
  font-size:32px;font-weight:600;letter-spacing:-0.5px;
  background:linear-gradient(135deg,#fff 0%,var(--accent) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.header-subtitle{color:var(--text-dim);font-size:15px;margin-top:8px;font-weight:400}

.upload-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:32px}
.upload-card{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);overflow:hidden;
  transition:border-color var(--transition),box-shadow var(--transition);
}
.upload-card:has(.upload-zone.drag-over){
  border-color:var(--accent);
  box-shadow:0 0 0 1px var(--accent-glow),0 0 24px var(--accent-glow);
}
.upload-card:has(.has-image){
  border-color:rgba(200,168,110,0.3);
}
.upload-label{
  display:flex;align-items:center;gap:8px;
  padding:12px 14px 8px;font-size:13px;font-weight:500;color:var(--text-dim);
}
.upload-label-icon{
  width:22px;height:22px;display:flex;align-items:center;justify-content:center;
  border-radius:6px;background:var(--accent-dim);
  font-size:11px;font-weight:600;color:var(--accent);
}
.upload-zone{
  position:relative;margin:2px 10px 10px;
  border:1px dashed var(--border);border-radius:var(--radius-sm);
  min-height:180px;cursor:pointer;
  transition:border-color var(--transition),background var(--transition);
  display:flex;align-items:center;justify-content:center;
}
.upload-zone:hover{border-color:var(--border-active);background:var(--bg-card-hover)}
.upload-zone.drag-over{
  border-color:var(--accent);background:var(--accent-dim);
}
.upload-input{position:absolute;inset:0;opacity:0;cursor:pointer;z-index:2}
.upload-placeholder{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  padding:32px 16px;text-align:center;pointer-events:none;
}
.upload-icon{color:var(--text-muted);opacity:0.6}
.upload-text{font-size:13px;color:var(--text-dim);font-weight:500}
.upload-hint{font-size:11px;color:var(--text-muted)}

.preview-container{
  position:relative;width:100%;height:200px;display:none;overflow:hidden;
}
.preview-container.active{display:block}
.preview-image{width:100%;height:100%;object-fit:cover;border-radius:6px}
.preview-remove{
  position:absolute;top:6px;right:6px;width:28px;height:28px;
  border-radius:50%;border:none;background:rgba(0,0,0,0.7);
  color:#fff;font-size:18px;cursor:pointer;display:flex;
  align-items:center;justify-content:center;line-height:1;
  transition:background var(--transition);
}
.preview-remove:hover{background:var(--danger)}
.upload-status{height:2px;margin:0 10px 8px;border-radius:2px;overflow:hidden;transition:all var(--transition)}
.upload-status.loading{background:var(--accent-dim)}
.upload-status.loading::after{
  content:'';display:block;height:100%;width:30%;
  background:var(--accent);border-radius:2px;
  animation:statusPulse 1.5s ease infinite;
}
@keyframes statusPulse{
  0%{transform:translateX(-100%)}100%{transform:translateX(400%)}
}

.generate-btn{
  display:flex;align-items:center;justify-content:center;gap:10px;
  width:100%;padding:16px 24px;border:none;border-radius:var(--radius);
  font-size:16px;font-weight:600;cursor:pointer;
  background:linear-gradient(135deg,var(--accent),#d4b87a);
  color:#0a0a0b;transition:opacity var(--transition),transform var(--transition);
  position:relative;overflow:hidden;
}
.generate-btn:hover:not(:disabled){opacity:0.92;transform:translateY(-1px)}
.generate-btn:active:not(:disabled){transform:translateY(0)}
.generate-btn:disabled{opacity:0.25;cursor:not-allowed}
.generate-btn.loading .generate-btn-text{visibility:hidden}
.generate-btn.loading .generate-btn-icon{visibility:hidden}
.generate-btn-spinner{display:none;position:absolute;width:20px;height:20px;border:2px solid rgba(0,0,0,0.2);border-top-color:#0a0a0b;border-radius:50%;animation:spin 0.7s linear infinite}
.generate-btn.loading .generate-btn-spinner{display:block}
@keyframes spin{to{transform:rotate(360deg)}}

.loading-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,0.85);
  display:flex;align-items:center;justify-content:center;z-index:100;
  backdrop-filter:blur(8px);
}
.loading-content{text-align:center}
.spinner{width:40px;height:40px;border:3px solid rgba(200,168,110,0.15);border-top-color:var(--accent);border-radius:50%;animation:spin 0.8s linear infinite;margin:0 auto 32px}
.loading-steps{display:flex;flex-direction:column;gap:16px;text-align:left}
.loading-step{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--text-dim);transition:color var(--transition)}
.loading-step.active{color:var(--text)}
.loading-step.done{color:var(--accent)}
.step-indicator{
  width:18px;height:18px;border-radius:50%;border:2px solid var(--text-muted);
  flex-shrink:0;position:relative;transition:all var(--transition);
}
.loading-step.active .step-indicator{border-color:var(--accent);border-top-color:transparent;animation:spin 0.8s linear infinite}
.loading-step.done .step-indicator{border-color:var(--accent);background:var(--accent)}
.loading-step.done .step-indicator::after{content:'✓';position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:11px;color:#0a0a0b;font-weight:700}

.result-section{margin-top:40px}
.result-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.result-title{font-size:20px;font-weight:600}
.result-actions{display:flex;gap:8px}
.action-btn{
  display:flex;align-items:center;gap:6px;padding:8px 16px;
  border:1px solid var(--border);border-radius:var(--radius-sm);
  background:var(--bg-card);color:var(--text);font-size:13px;font-weight:500;
  cursor:pointer;transition:all var(--transition);
}
.action-btn:hover{background:var(--bg-card-hover);border-color:var(--border-active)}
.action-btn--outline{background:transparent}
.result-image-wrapper{
  border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--border);background:var(--bg-card);
}
.result-image{width:100%;height:auto;display:block}

.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(100px);
  padding:12px 24px;border-radius:var(--radius-sm);
  background:var(--bg-card);border:1px solid var(--border);
  font-size:14px;color:var(--text);opacity:0;
  transition:all 300ms ease;z-index:200;pointer-events:none;
  white-space:nowrap;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.error{border-color:var(--danger);color:var(--danger)}

@media(max-width:720px){
  .app{padding:24px 16px 60px}
  .upload-grid{grid-template-columns:1fr;gap:12px}
  .header{margin-bottom:32px}
  .header-title{font-size:24px}
  .result-header{flex-direction:column;align-items:flex-start;gap:12px}
  .result-actions{width:100%}
  .action-btn{flex:1;justify-content:center}
}