*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg-primary:#192a51;
  --bg-secondary:#1f325c;
  --bg-tertiary:#2a406e;
  --bg-elevated:#334a7a;
  --border-primary:#967aa1;
  --border-secondary:#6d5a7a;
  --text-primary:#f5e6e8;
  --text-secondary:#d5c6e0;
  --text-muted:#aaa1c8;
  --accent:#f5e6e8;
  --accent-dim:#d5c6e0;
  --accent-glow:rgba(245,230,232,0.12);
  --danger:#ef4444;
  --warning:#f59e0b;
  --radius-sm:4px;
  --radius-md:6px;
  --radius-lg:8px;
  --font-sans:'IBM Plex Sans',-apple-system,BlinkMacSystemFont,sans-serif;
  --font-mono:'JetBrains Mono','SF Mono','Fira Code',monospace;
  --transition:150ms ease;
}
html{font-size:15px}
body{
  font-family:var(--font-sans);
  background:var(--bg-primary);
  color:var(--text-primary);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  min-height:100vh;
}
#app{max-width:1400px;margin:0 auto;padding:0 24px}
::selection{background:var(--accent);color:#fff}

/* Top Bar */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 0;border-bottom:1px solid var(--border-primary);
  gap:24px;flex-wrap:wrap;
}
.topbar-left{flex-shrink:0}
.logo-area{display:flex;align-items:center;gap:12px}
.logo-icon{color:var(--accent);flex-shrink:0}
.logo-text{
  font-family:var(--font-mono);font-size:1.1rem;font-weight:600;
  color:var(--text-primary);display:block;line-height:1.2;
}
.logo-desc{
  font-size:0.78rem;color:var(--text-muted);display:block;line-height:1.2;
  white-space:nowrap;
}
.topbar-right{display:flex;gap:8px;flex-wrap:wrap}
.tag{
  font-family:var(--font-mono);font-size:0.7rem;padding:3px 10px;
  border-radius:var(--radius-sm);border:1px solid var(--border-primary);
  color:var(--text-secondary);letter-spacing:0.02em;
  white-space:nowrap;
}
.tag-canvas{border-color:rgba(34,197,94,0.3);color:var(--accent)}
.tag-pixel{border-color:rgba(245,158,11,0.3);color:var(--warning)}
.tag-quant{border-color:rgba(59,130,246,0.3);color:#3b82f6}

/* Workspace */
.workspace{
  display:grid;grid-template-columns:1fr 1fr;gap:24px;
  padding:24px 0;min-height:60vh;
}
@media(max-width:900px){.workspace{grid-template-columns:1fr}}

.panel{
  background:var(--bg-secondary);border:1px solid var(--border-primary);
  border-radius:var(--radius-lg);display:flex;flex-direction:column;
  min-height:400px;
}
.panel-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 18px;border-bottom:1px solid var(--border-secondary);
  flex-wrap:wrap;gap:8px;
}
.panel-title{
  font-family:var(--font-sans);font-size:0.85rem;font-weight:500;
  color:var(--text-primary);letter-spacing:0.01em;
}
.panel-controls{display:flex;align-items:center;gap:8px}

/* Select */
.select-sm{
  background:var(--bg-tertiary);color:var(--text-primary);
  border:1px solid var(--border-primary);border-radius:var(--radius-sm);
  padding:3px 24px 3px 8px;font-size:0.78rem;font-family:var(--font-mono);
  cursor:pointer;appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' fill='%239090a8'%3E%3Cpath d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 6px center;
}
.select-sm:focus{outline:none;border-color:var(--accent)}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--bg-tertiary);color:var(--text-secondary);
  border:1px solid var(--border-primary);border-radius:var(--radius-sm);
  padding:5px 12px;font-size:0.78rem;font-family:var(--font-sans);
  cursor:pointer;transition:all var(--transition);white-space:nowrap;
}
.btn:hover{background:var(--bg-elevated);color:var(--text-primary);border-color:var(--text-muted)}
.btn:disabled{opacity:0.4;cursor:default;pointer-events:none}
.btn-sm{padding:4px 10px;font-size:0.75rem}
.btn-xs{padding:2px 8px;font-size:0.7rem;font-family:var(--font-mono)}

/* Dropdown */
.dropdown-wrapper{position:relative}
.dropdown-menu{
  position:absolute;top:calc(100% + 4px);right:0;z-index:20;
  background:var(--bg-elevated);border:1px solid var(--border-primary);
  border-radius:var(--radius-md);min-width:200px;overflow:hidden;
  box-shadow:0 8px 24px rgba(0,0,0,0.4);
}
.dropdown-item{
  display:block;width:100%;text-align:left;padding:8px 14px;
  background:none;border:none;color:var(--text-secondary);font-size:0.8rem;
  font-family:var(--font-sans);cursor:pointer;transition:all var(--transition);
}
.dropdown-item:hover{background:var(--bg-tertiary);color:var(--text-primary)}

/* Dropzone */
.dropzone{
  flex:1;display:flex;align-items:center;justify-content:center;
  margin:18px;border:1.5px dashed var(--border-primary);
  border-radius:var(--radius-lg);cursor:pointer;min-height:260px;
  transition:all var(--transition);position:relative;overflow:hidden;
}
.dropzone:hover{border-color:var(--accent);background:var(--accent-glow)}
.dropzone.drag-over{border-color:var(--accent);background:var(--accent-glow)}
.dropzone-content{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  padding:32px;text-align:center;pointer-events:none;
}
.dropzone-icon{color:var(--text-muted)}
.dropzone-text{font-size:0.85rem;color:var(--text-secondary)}
.dropzone-link{color:var(--accent);text-decoration:underline;cursor:pointer}
.dropzone-hint{font-size:0.72rem;color:var(--text-muted);font-family:var(--font-mono)}
.dropzone-preview{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
}
.dropzone-preview img{max-width:100%;max-height:100%;object-fit:contain}
.hidden{display:none!important}

/* Image Metadata */
.image-metadata{
  margin:0 18px 12px;padding:10px 14px;
  background:var(--bg-tertiary);border-radius:var(--radius-md);
  border:1px solid var(--border-secondary);
}
.meta-row{
  display:flex;justify-content:space-between;align-items:center;
  padding:3px 0;font-size:0.78rem;font-family:var(--font-mono);
}
.meta-label{color:var(--text-muted)}
.meta-value{color:var(--text-primary)}

/* Processing Bar */
.processing-bar{
  margin:0 18px 18px;height:4px;background:var(--bg-tertiary);
  border-radius:2px;overflow:hidden;position:relative;
}
.processing-bar-fill{
  height:100%;width:0;background:var(--accent);border-radius:2px;
  transition:width 200ms ease;
}
.processing-text{
  position:absolute;top:8px;left:0;font-size:0.7rem;
  font-family:var(--font-mono);color:var(--text-muted);
}

/* Palette Placeholder */
.palette-placeholder{
  flex:1;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:12px;padding:48px;
}
.palette-placeholder-text{font-size:0.85rem;color:var(--text-muted)}

/* Palette Grid */
.palette-grid{
  flex:1;padding:18px;display:grid;gap:12px;
  grid-template-columns:1fr 1fr;
}
@media(max-width:500px){.palette-grid{grid-template-columns:1fr}}

.color-swatch{
  display:flex;gap:12px;align-items:stretch;
  border:1px solid var(--border-secondary);
  border-radius:var(--radius-md);overflow:hidden;
  cursor:pointer;transition:all var(--transition);
  background:var(--bg-tertiary);
}
.color-swatch:hover{border-color:var(--accent);background:var(--bg-elevated)}
.color-swatch.copied{border-color:var(--accent);background:var(--accent-glow);animation:copy-flash 400ms ease}
.color-preview{
  width:48px;flex-shrink:0;position:relative;
}
.color-preview-copy{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(0,0,0,0.5);opacity:0;transition:opacity var(--transition);
  color:#fff;font-size:0.7rem;font-family:var(--font-mono);
}
.color-swatch:hover .color-preview-copy{opacity:1}
.color-info{
  flex:1;padding:8px 8px 8px 0;display:flex;flex-direction:column;
  gap:1px;justify-content:center;min-width:0;
}
.color-hex{
  font-family:var(--font-mono);font-size:0.82rem;font-weight:500;
  color:var(--text-primary);letter-spacing:0.01em;
}
.color-rgb,.color-hsl{
  font-family:var(--font-mono);font-size:0.65rem;color:var(--text-muted);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

/* Raw Colors */
.raw-colors{margin:0 18px 18px}
.section-subtitle{
  font-size:0.78rem;font-weight:500;color:var(--text-secondary);
  margin-bottom:8px;padding-top:8px;border-top:1px solid var(--border-secondary);
}
.raw-colors-list{display:flex;flex-wrap:wrap;gap:6px}
.raw-color-chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px 3px 3px;
  background:var(--bg-tertiary);border:1px solid var(--border-secondary);
  border-radius:var(--radius-sm);font-size:0.7rem;font-family:var(--font-mono);
  color:var(--text-muted);
}
.raw-color-chip .color-dot{
  width:12px;height:12px;border-radius:2px;flex-shrink:0;
}
.raw-color-chip .raw-count{color:var(--text-muted);font-size:0.65rem}

/* Under Hood */
.under-hood{
  border-top:1px solid var(--border-primary);
  padding:48px 0;
}
.under-hood-inner{max-width:900px}
.under-hood-title{
  font-family:var(--font-mono);font-size:0.85rem;font-weight:600;
  color:var(--text-primary);margin-bottom:4px;
}
.under-hood-subtitle{font-size:0.85rem;color:var(--text-muted);margin-bottom:32px}

/* Pipeline */
.pipeline{
  display:flex;align-items:center;gap:0;flex-wrap:wrap;
  margin-bottom:32px;
}
.pipeline-step{
  display:flex;align-items:center;gap:8px;
}
.step-label{
  font-family:var(--font-mono);font-size:0.72rem;
  padding:6px 14px;border:1px solid var(--border-primary);
  border-radius:var(--radius-md);color:var(--text-secondary);
  background:var(--bg-secondary);white-space:nowrap;
}
.pipeline-step:first-child .step-label{border-color:rgba(34,197,94,0.3);color:var(--accent)}
.pipeline-step:last-child .step-label{border-color:rgba(34,197,94,0.3);color:var(--accent);background:var(--accent-glow)}
.step-arrow{color:var(--text-muted);flex-shrink:0}

/* Code Block */
.code-block{
  background:var(--bg-secondary);border:1px solid var(--border-primary);
  border-radius:var(--radius-lg);overflow:hidden;margin-bottom:32px;
}
.code-block-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:8px 16px;border-bottom:1px solid var(--border-secondary);
}
.code-block-title{
  font-family:var(--font-mono);font-size:0.72rem;color:var(--text-muted);
}
.code-block pre{margin:0;padding:16px;overflow-x:auto}
.code-block code{
  font-family:var(--font-mono);font-size:0.78rem;line-height:1.7;color:var(--text-primary);
}
.code-kw{color:#c792ea}
.code-fn{color:#82aaff}
.code-num{color:#f78c6c}
.code-prop{color:#ffcb6b}
.code-cm{color:#546e7a;font-style:italic}

/* Explanation Grid */
.explanation-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
@media(max-width:768px){.explanation-grid{grid-template-columns:1fr}}
.explanation-card{
  background:var(--bg-secondary);border:1px solid var(--border-secondary);
  border-radius:var(--radius-md);padding:18px;
}
.explanation-card h4{
  font-size:0.82rem;font-weight:500;color:var(--text-primary);margin-bottom:8px;
}
.explanation-card p{
  font-size:0.78rem;color:var(--text-secondary);line-height:1.6;
}
.inline-code{
  font-family:var(--font-mono);font-size:0.72rem;background:var(--bg-tertiary);
  padding:1px 5px;border-radius:3px;color:var(--accent);
}

/* Footer */
.footer{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 0;border-top:1px solid var(--border-secondary);
  font-size:0.72rem;color:var(--text-muted);font-family:var(--font-mono);
  flex-wrap:wrap;gap:8px;
}

/* Toast */
.toast-container{
  position:fixed;bottom:24px;right:24px;z-index:100;
  display:flex;flex-direction:column;gap:8px;
}
.toast{
  background:var(--bg-elevated);border:1px solid var(--border-primary);
  border-radius:var(--radius-md);padding:10px 18px;
  font-size:0.78rem;font-family:var(--font-mono);color:var(--text-primary);
  box-shadow:0 8px 24px rgba(0,0,0,0.4);
  animation:toast-in 200ms ease;
}
@keyframes toast-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@keyframes copy-flash{0%{border-color:var(--accent);box-shadow:inset 0 0 0 0 var(--accent-glow)}50%{box-shadow:inset 0 0 0 2px var(--accent)}100%{border-color:var(--accent);box-shadow:inset 0 0 0 0 var(--accent-glow)}}