:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1c232c;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #9aa4af;
  --accent: #2f81f7;
  --accent-hover: #3a8df8;
  --danger: #f85149;
  --good: #3fb950;
  --code: #161b22;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--accent); }
a:hover { color: var(--accent-hover); }

header, footer, main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
}

header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.6rem;
}
header .tag {
  font-size: 0.75rem;
  background: var(--accent);
  padding: 2px 8px;
  border-radius: 999px;
  vertical-align: middle;
  letter-spacing: 0.04em;
}
header p { color: var(--muted); margin: 0.25rem 0 0.75rem; }
header nav { margin-top: 1rem; display: flex; gap: 0.25rem; border-bottom: 1px solid var(--border); }
header nav .tab {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.95rem;
  border-bottom: 2px solid transparent;
}
header nav .tab.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

footer {
  border-top: 1px solid var(--border);
  margin-top: 2rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1rem;
}
.panel h2 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 800px) {
  .grid { grid-template-columns: 1fr; }
}

.row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.5rem 0;
  flex-wrap: wrap;
}
.row label { color: var(--muted); min-width: 7em; }

.toolbar { gap: 0.5rem; }

input[type="text"], input[type="number"], select, textarea {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  font-family: inherit;
  font-size: inherit;
}
textarea {
  width: 100%;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  resize: vertical;
}
input[type="file"] { display: none; }

.btn {
  display: inline-block;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  font-size: inherit;
  text-align: center;
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
}
.btn.primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
  color: var(--muted);
  transition: border-color 0.15s, background 0.15s;
  margin-bottom: 0.75rem;
}
.dropzone.drag { border-color: var(--accent); background: rgba(47,129,247,0.08); }
.dropzone p { margin: 0.25rem 0; }
.hint { color: var(--muted); font-size: 0.85rem; }

#preview, #editor {
  display: block;
  background:
    repeating-conic-gradient(#1c232c 0% 25%, #161b22 0% 50%) 50% / 16px 16px;
  border: 1px solid var(--border);
  border-radius: 4px;
  max-width: 100%;
  height: auto;
}
.canvas-wrap {
  overflow: auto;
  max-width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px;
}
#editor {
  cursor: crosshair;
  background: #ffffff; /* white = printer media */
  image-rendering: pixelated;
}

.status {
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.status.loading { background: rgba(47,129,247,0.1); border: 1px solid var(--accent); color: var(--accent); }
.status.ready   { background: rgba(63,185,80,0.1);  border: 1px solid var(--good);   color: var(--good); }
.status.error   { background: rgba(248,81,73,0.1);  border: 1px solid var(--danger); color: var(--danger); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

code {
  background: var(--code);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}