:root {
  --bg: #0d1117;
  --bg-elev: #161b22;
  --bg-elev-2: #1c232c;
  --border: #2a313c;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #ff8a3d;
  --accent-dim: #a85a28;
  --ok: #3fb950;
  --danger: #f85149;
  --radius: 10px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 0.75rem; }
.brand-mark { font-size: 1.8rem; color: var(--accent); }
.brand h1 { margin: 0; font-size: 1.25rem; font-weight: 600; }
.brand .accent { color: var(--accent); }
.tagline { margin: 0.15rem 0 0; color: var(--text-dim); font-size: 0.85rem; }

.header-actions { display: flex; align-items: center; gap: 1.1rem; flex-wrap: wrap; }

.github-link {
  display: flex; align-items: center; gap: 0.4rem; color: var(--text-dim); text-decoration: none;
  font-size: 0.85rem; border: 1px solid var(--border); border-radius: 999px; padding: 0.3rem 0.75rem;
}
.github-link:hover { color: var(--text); border-color: var(--accent); }

.engine-status { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: var(--text-dim); }
.status-dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.status-dot--off { background: var(--text-dim); }
.status-dot--loading { background: var(--accent); animation: pulse 1s infinite; }
.status-dot--on { background: var(--ok); }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

main.layout {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: start;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem 2rem;
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
}

.col { display: grid; gap: 1.25rem; align-content: start; }

@media (max-width: 860px) {
  main.layout { grid-template-columns: 1fr; }
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
}

.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.75rem; gap: 0.75rem; flex-wrap: wrap; }
.card-head h2, .card-head h3 { margin: 0; font-size: 1rem; font-weight: 600; }

.toggle { display: flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; color: var(--text-dim); cursor: pointer; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--accent); background: rgba(255,138,61,0.06); }
.dropzone p { margin: 0.25rem 0; }
.dropzone .hint { color: var(--text-dim); font-size: 0.8rem; }

.file-preview { display: flex; gap: 1.25rem; margin-top: 1rem; flex-wrap: wrap; align-items: flex-start; }
.file-preview img { max-width: 220px; max-height: 220px; border-radius: 8px; border: 1px solid var(--border); object-fit: contain; background: #000; }
.meta-grid { display: grid; grid-template-columns: auto auto; gap: 0.15rem 0.75rem; font-size: 0.85rem; margin: 0; }
.meta-grid dt { color: var(--text-dim); }
.meta-grid dd { margin: 0; }

.batch-queue { list-style: none; margin: 1rem 0 0; padding: 0; display: grid; gap: 0.4rem; }
.batch-queue li { display: flex; align-items: center; justify-content: space-between; background: var(--bg-elev-2); border: 1px solid var(--border); border-radius: 8px; padding: 0.4rem 0.6rem; font-size: 0.85rem; }
.batch-status { font-size: 0.75rem; padding: 0.1rem 0.5rem; border-radius: 999px; background: var(--bg-elev); color: var(--text-dim); }
.batch-status--done { color: var(--ok); }
.batch-status--error { color: var(--danger); }
.batch-status--processing { color: var(--accent); }

.mode-switch { display: flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.mode-btn { background: none; border: none; color: var(--text-dim); padding: 0.35rem 0.9rem; font-size: 0.8rem; cursor: pointer; }
.mode-btn.active { background: var(--accent); color: #1a1005; font-weight: 600; }

.op-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; }
.op-select, select, input[type="text"], input[type="number"] {
  background: var(--bg-elev-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 0.4rem 0.6rem; font-size: 0.85rem;
}
.op-hint { color: var(--text-dim); font-size: 0.8rem; }

.op-params { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 0.75rem 1rem; }
.op-params label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.8rem; color: var(--text-dim); }
.op-params label.checkbox { flex-direction: row; align-items: center; }
.op-params input[type="range"] { accent-color: var(--accent); }

.stack-row { margin-top: 1rem; border-top: 1px dashed var(--border); padding-top: 0.85rem; }
.stack-list { list-style: decimal; padding-left: 1.4rem; margin: 0.6rem 0; display: grid; gap: 0.3rem; font-size: 0.85rem; }
.stack-list li { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.stack-list button { background: none; border: none; color: var(--danger); cursor: pointer; font-size: 0.8rem; }
.stack-preview { display: block; background: var(--bg-elev-2); border: 1px solid var(--border); border-radius: 8px; padding: 0.5rem 0.7rem; font-size: 0.78rem; color: var(--accent); overflow-x: auto; white-space: pre; }

.multi-extras { margin-top: 1rem; display: grid; gap: 0.75rem; }
.multi-extras .file-slot { display: flex; align-items: center; gap: 0.6rem; font-size: 0.85rem; }

.output-row { display: flex; align-items: center; gap: 1.1rem; flex-wrap: wrap; margin-bottom: 0.9rem; }
.output-row label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.8rem; color: var(--text-dim); }
#qualityWrap { flex-direction: row; align-items: center; }

.btn {
  border: none; border-radius: 8px; padding: 0.5rem 1rem; font-size: 0.85rem; cursor: pointer;
  font-weight: 600; transition: opacity 0.15s; display: inline-flex; align-items: center; gap: 0.4rem;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #1a1005; }
.btn-secondary { background: var(--bg-elev-2); color: var(--text); border: 1px solid var(--border); }
.btn:hover:not(:disabled) { opacity: 0.85; }

.result { display: flex; gap: 1.25rem; align-items: flex-start; margin-bottom: 1rem; flex-wrap: wrap; }
.result img { max-width: 320px; max-height: 320px; border-radius: 8px; border: 1px solid var(--border); background: #000; object-fit: contain; }
.result-actions { display: flex; flex-direction: column; gap: 0.5rem; align-items: flex-start; }

.batch-outputs { margin-bottom: 1rem; }
.batch-output-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.4rem; }
.batch-output-list li { display: flex; align-items: center; gap: 0.6rem; background: var(--bg-elev-2); border: 1px solid var(--border); border-radius: 8px; padding: 0.4rem 0.6rem; font-size: 0.82rem; }
.batch-output-list img { width: 40px; height: 40px; object-fit: cover; border-radius: 4px; background: #000; }
.batch-output-list .grow { flex: 1; }

.log {
  background: #010409; border: 1px solid var(--border); border-radius: 8px; padding: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.78rem; color: #7ee787;
  max-height: 220px; overflow-y: auto; white-space: pre-wrap; margin: 0;
}

.app-footer { text-align: center; color: var(--text-dim); font-size: 0.8rem; padding: 1rem 1.5rem 2rem; }
.app-footer a { color: var(--accent); text-decoration: none; }
.app-footer a:hover { text-decoration: underline; }
.hint { color: var(--text-dim); font-size: 0.8rem; }

@media (max-width: 640px) {
  .app-header { flex-direction: column; align-items: flex-start; }
}