:root { --bg:#0b0d10; --panel:#12161b; --muted:#9aa4b2; --accent:#4f46e5; --accent2:#22c55e; --danger:#ef4444; }
* { box-sizing: border-box; }
body { margin:0; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial; background:var(--bg); color:#e5e7eb; }
header { padding:16px 20px; border-bottom:1px solid #1f2937; display:flex; gap:16px; align-items:center; }
.title { font-size:18px; font-weight:700; letter-spacing:0.2px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }

.container { padding:16px; max-width:1400px; margin:0 auto; display:grid; gap:12px; }
.panel { background:var(--panel); border:1px solid #1f2937; border-radius:14px; padding:12px; box-shadow: 0 8px 24px rgba(0,0,0,.25); }

.dropzone { border:1.5px dashed #334155; border-radius:12px; padding:22px; text-align:center; background:#0f1318; cursor:pointer; }
.dropzone.drag { border-color:var(--accent); background:rgba(79,70,229,0.1); }

.toolbar { display:flex; flex-wrap:wrap; gap:8px; align-items:center; }
.toolbar.spread { justify-content:space-between; }
.toolbar .group { display:flex; gap:8px; align-items:center; }
.toolbar .group.wrap { flex-wrap:wrap; }
.toolbar .group.right { margin-left:auto; gap:8px; }

button, .btn { background:#1f2937; color:#e5e7eb; border:1px solid #334155; padding:6px 10px; border-radius:10px; cursor:pointer; font-weight:600; text-decoration:none; font-size:13px; }
button:hover, .btn:hover { border-color:#475569; }
.btn-success { background:var(--accent2); border-color:var(--accent2); color:#04140a; }
.btn-danger { background:var(--danger); border-color:var(--danger); }
select, textarea, input { background:#0f1318; color:#e5e7eb; border:1px solid #263041; border-radius:10px; padding:6px 8px; font-size:13px; }
input#levelName { width:180px; }
.checkbox { display:inline-flex; align-items:center; gap:6px; user-select:none; }

/* Tool emphasis */
.tool.active { outline: 2px solid var(--accent); background: rgba(79,70,229,0.15); box-shadow: 0 0 0 3px rgba(79,70,229,0.25) inset; }

/* Steps layout */
.steps { display:grid; gap:12px; }
.steps.one   { grid-template-columns: 1fr; }
.steps.two   { grid-template-columns: 1fr 1fr; }
.steps.all   { grid-template-columns: repeat(auto-fill, minmax(360px, 1fr)); }

.step { border:1px solid #1f2937; border-radius:14px; overflow:hidden; background:#0f1318; display:flex; flex-direction:column; }
.step-header { display:flex; align-items:center; justify-content:space-between; gap:12px; padding:8px 10px; border-bottom:1px solid #1f2937; background:#0e1217; }
.step-body { display:grid; gap:10px; padding:10px; grid-template-columns: 1fr; }

.image-wrap { position:relative; width:100%; background:#0b0e12; border:1px solid #1f2937; border-radius:12px; }
.image-wrap img { display:block; width:100%; height:auto; } /* scale horizontally; page scrolls vertically if needed */
.image-wrap canvas { position:absolute; left:0; top:0; pointer-events:auto; }

/* Preview split */
.preview-wrap { display:none; border:1px solid #1f2937; border-radius:12px; overflow:hidden; }
.preview-split { display:grid; grid-template-columns: 1fr 1fr; gap:0; }
.preview-split.single { grid-template-columns: 1fr; }
.preview-split .pane { background:#0b0e12; border-right:1px solid #1f2937; }
.preview-split .pane:last-child { border-right:none; }
.preview-split img { display:block; width:100%; height:auto; }
.preview-meta { margin:0; background:#0b0e12; border-top:1px solid #1f2937; padding:6px; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas; font-size:11px; color:var(--muted); max-height:24vh; overflow:auto; }

/* Layout variants */
.step.layout-work-new .step-body { grid-template-columns: 1fr 1fr; }
.step.layout-work-new .preview-wrap { display:block; }
.step.layout-work-new .preview-split { grid-template-columns: 1fr; }
.step.layout-work-new .prev-original { display:none; }

.step.layout-split-only .image-wrap { display:none; }
.step.layout-split-only .preview-wrap { display:block; }

/* Compact params ribbon */
.params { padding:8px; }
.params::before { content:"Parameters"; display:block; color:var(--muted); margin:0 0 6px 2px; font-size:12px; }
.params .rows { display:flex; flex-wrap:nowrap; gap:8px; overflow-x:auto; padding-bottom:2px; }
.param { display:flex; align-items:center; gap:8px; background:#0f1318; border:1px solid #1f2937; border-radius:10px; padding:6px 8px; white-space:nowrap; }
.param label { font-size:12px; color:#cbd5e1; min-width:80px; }
.param input[type=range] { width:160px; }
.param .val { width:48px; text-align:right; color:var(--muted); font-variant-numeric: tabular-nums; font-size:12px; }
.param select { max-width:160px; }

/* Gallery */
.gallery-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:10px; }
.gallery-grid { display:grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap:10px; }
.thumb { position:relative; border:1px solid #1f2937; border-radius:12px; background:#0f1318; overflow:hidden; }
.thumb .name-row { display:flex; align-items:center; justify-content:space-between; gap:6px; padding:8px; font-weight:600; font-size:13px; }
.thumb img { display:block; width:100%; height:120px; object-fit:cover; background:#0b0e12; }
.thumb .meta-row { display:flex; align-items:center; justify-content:space-between; font-size:12px; padding:6px 8px; color:var(--muted); }
.thumb .actions { display:flex; gap:6px; padding:8px; }
.thumb .icon-btn { background:#111827; border:1px solid #1f2937; border-radius:8px; padding:6px 8px; cursor:pointer; }
.thumb .icon-btn.danger { border-color:#7f1d1d; background:#1f0f13; color:#fecaca; }

/* Hints */
#hintPanel { display:flex; flex-direction:column; gap:4px; }
.hint-title { font-weight:700; }
.hint-text em { color:#cbd5e1; }

/* JSON ribbon + modal */
.meta { position: relative; }
.meta .json-ribbon {
  display:flex; align-items:center; gap:8px;
  margin:8px 0;
}
.meta .json-toggle { cursor:pointer; font-size:12px; padding:4px 8px; border:1px solid #334155; border-radius:8px; background:#0f1318; }
.meta .json-area { display:none; }
.meta .json-area.show { display:block; }
.meta textarea { width:100%; min-height:120px; max-height:40vh; overflow:auto; }

#jsonModal.backdrop { position:fixed; inset:0; background:rgba(0,0,0,.6); display:none; align-items:center; justify-content:center; z-index:50; }
#jsonModal .box { width:min(960px, 96vw); height:min(80vh, 96vh); background:#0f1318; border:1px solid #1f2937; border-radius:12px; padding:10px; display:flex; flex-direction:column; gap:8px; }
#jsonModal .box header { display:flex; justify-content:space-between; align-items:center; }
#jsonModal textarea { flex:1; width:100%; height:100%; resize:none; }