:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --panel-alt: #f0f1f4;
  --border: #d8dade;
  --text: #1f2328;
  --muted: #6b7280;
  --accent: #2f6feb;
  --accent-soft: #dbe6ff;
  --canvas-top: #dfe4ec;
  --canvas-bottom: #b9c2d0;
  --shadow: 0 1px 2px rgba(0, 0, 0, .07);
}

[data-theme="dark"] {
  --bg: #14171c;
  --panel: #1b1f26;
  --panel-alt: #21262e;
  --border: #2c323b;
  --text: #e5e8ec;
  --muted: #8b93a1;
  --accent: #5b8dff;
  --accent-soft: #23324f;
  --canvas-top: #1e232b;
  --canvas-bottom: #0e1116;
  --shadow: none;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.5 "Segoe UI", "Noto Sans KR", system-ui, sans-serif;
  overflow: hidden;
}

/* --- header --------------------------------------------------------------- */
.bar {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 46px;
  padding: 0 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: baseline; gap: 8px; }
.mark { font-weight: 700; letter-spacing: .04em; }
.sub { color: var(--muted); font-size: 12px; }

.stages { display: flex; gap: 6px; flex: 1; overflow: hidden; }

.chip {
  padding: 3px 9px;
  border: 1px solid var(--border);
  border-radius: 11px;
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}
.chip.on { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

.actions { display: flex; gap: 6px; }

button {
  font: inherit;
  cursor: pointer;
  border-radius: 5px;
  padding: 5px 11px;
  border: 1px solid var(--border);
  background: var(--panel-alt);
  color: var(--text);
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:disabled { opacity: .55; cursor: default; }
button.ghost { background: transparent; min-width: 46px; }

/* --- layout --------------------------------------------------------------- */
#workspace {
  display: flex;
  height: calc(100% - 46px);
  align-items: stretch;
}

.panel {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  min-width: 160px;
  overflow: hidden;
}
#left { width: 300px; flex: 0 0 auto; }
#right { width: 300px; flex: 0 0 auto; }
.panel.center { flex: 1 1 auto; min-width: 220px; }

.panel-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 11px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 12px;
}
.path { color: var(--muted); font-weight: 400; font-size: 11px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.panel-body { flex: 1; overflow: auto; }

.block { border-bottom: 1px solid var(--border); }
.block-head.split { display: flex; align-items: center; justify-content: space-between; }
.block-head.split button { padding: 1px 8px; font-size: 10px; min-width: 0; }

.block-head.tabs { display: flex; gap: 0; padding: 0; }
.tabs .tab {
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  padding: 6px 11px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.tabs .tab:hover { color: var(--text); }
.tabs .tab.on { color: var(--accent); border-bottom-color: var(--accent); }

.block-head {
  padding: 6px 11px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--muted);
  background: var(--panel-alt);
}

.splitter {
  flex: 0 0 5px;
  cursor: col-resize;
  background: var(--border);
}
.splitter:hover, .splitter.active { background: var(--accent); }

/* --- trees ---------------------------------------------------------------- */
ul.tree, ul.tree ul { list-style: none; margin: 0; padding: 0; }
ul.tree { padding: 4px 0 8px; }
ul.tree ul { padding-left: 13px; }

.node {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 11px;
  cursor: pointer;
  white-space: nowrap;
}
.node:hover { background: var(--panel-alt); }
.node.on { background: var(--accent-soft); color: var(--accent); }
.node .tw { width: 10px; color: var(--muted); font-size: 10px; }
.node .nm { overflow: hidden; text-overflow: ellipsis; }
.node .sz { margin-left: auto; color: var(--muted); font-size: 11px; }
.node.dim { color: var(--muted); }

/* --- pipeline stages ------------------------------------------------------ */
.stage { border-bottom: 1px solid var(--border); }
.stage:last-child { border-bottom: 0; }

.stage-head {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 6px 11px;
  cursor: pointer;
}
.stage-head:hover { background: var(--panel-alt); }
.tag {
  font-size: 10px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 3px;
  background: var(--accent-soft);
  color: var(--accent);
}
.stage-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.stage-body { padding: 2px 11px 9px; display: none; }
.stage.open .stage-body { display: block; }

.prop { margin: 5px 0; }
.prop-key { color: var(--muted); font-size: 11px; }
.prop-input {
  width: 100%;
  margin: 2px 0 0;
  padding: 5px 7px;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-family: ui-monospace, "Cascadia Mono", Menlo, monospace;
  font-size: 11px;
}
.prop-input:focus, .prop-val:focus { outline: 1px solid var(--accent); border-color: var(--accent); }
.prop-input.edited, .prop-val.edited { border-color: var(--accent); }

.prop-val {
  margin: 2px 0 0;
  padding: 5px 7px;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: ui-monospace, "Cascadia Mono", Menlo, monospace;
  font-size: 11px;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 190px;
  min-height: 64px;
  overflow: auto;
  width: 100%;
  resize: vertical;
  color: var(--text);
}

/* --- canvas --------------------------------------------------------------- */
[hidden] { display: none !important; }

.canvas-wrap { position: relative; flex: 1; min-height: 0; }
#scene { display: block; width: 100%; height: 100%; touch-action: none; }

.legend {
  position: absolute;
  top: 10px;
  left: 10px;
  max-height: calc(100% - 60px);
  overflow: auto;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  box-shadow: var(--shadow);
  font-size: 11px;
}
.legend-head {
  font-size: 10px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--muted); padding-bottom: 3px;
}
.legend-row { display: flex; align-items: center; gap: 6px; padding: 1px 0; cursor: pointer; }
.legend-row:hover { color: var(--accent); }
.legend-row.off { opacity: .42; text-decoration: line-through; }
.swatch { width: 10px; height: 10px; border-radius: 2px; flex: 0 0 auto; }
.legend-row .n { margin-left: auto; color: var(--muted); }

.viewtools {
  position: absolute;
  top: 10px;
  right: 10px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  box-shadow: var(--shadow);
  font-size: 11px;
}
.viewtools label { display: flex; align-items: center; gap: 6px; }
.viewtools input[type="range"] { width: 96px; accent-color: var(--accent); }
.viewtools .val { color: var(--muted); min-width: 34px; }
.viewtools button { padding: 2px 8px; font-size: 11px; min-width: 0; }

.hint {
  position: absolute;
  bottom: 8px;
  left: 10px;
  color: var(--muted);
  font-size: 11px;
  pointer-events: none;
}

.dropzone {
  position: absolute;
  inset: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--accent);
  border-radius: 8px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  font-size: 14px;
  text-align: center;
  pointer-events: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  background: color-mix(in srgb, var(--panel) 72%, transparent);
  font-size: 12px;
}
.spinner {
  width: 15px; height: 15px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- log / preview -------------------------------------------------------- */
.console { border-top: 1px solid var(--border); max-height: 32%; display: flex; flex-direction: column; }
.console-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 4px 11px; background: var(--panel-alt);
  font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted);
}
.console-head button { padding: 0 7px; min-width: 0; line-height: 1.4; }

#log, .preview {
  margin: 0;
  padding: 8px 11px;
  overflow: auto;
  font-family: ui-monospace, "Cascadia Mono", Menlo, monospace;
  font-size: 11px;
  white-space: pre-wrap;
  word-break: break-word;
}
#log { flex: 1; }
.preview { max-height: 360px; color: var(--muted); }
#runlog { color: var(--text); }
.err { color: #e5484d; }


/* --- narrow screens -------------------------------------------------------
   Three side-by-side panels do not fit a phone, and a drag splitter is no use
   on touch, so the panels become one at a time behind a tab bar. */
.mobile-tabs { display: none; }

@media (max-width: 900px) {
  .bar { height: auto; padding: 8px 10px; gap: 10px; flex-wrap: wrap; }
  .sub, .stages { display: none; }
  .actions { margin-left: auto; }
  button { padding: 6px 10px; }

  .mobile-tabs {
    display: flex;
    background: var(--panel);
    border-bottom: 1px solid var(--border);
  }
  .mtab {
    flex: 1;
    border: 0;
    border-radius: 0;
    border-bottom: 2px solid transparent;
    background: transparent;
    color: var(--muted);
    padding: 9px 4px;
    font-size: 12px;
  }
  .mtab.on { color: var(--accent); border-bottom-color: var(--accent); }

  #workspace { height: calc(100% - 96px); }
  .splitter { display: none; }

  /* one panel at a time, full width */
  #left, #right, .panel.center { display: none; width: 100% !important; flex: 1 1 auto; }
  #workspace.show-left #left,
  #workspace.show-right #right,
  #workspace.show-middle .panel.center { display: flex; }

  .legend { max-width: 55%; font-size: 10px; }
  .viewtools { top: auto; bottom: 8px; right: 8px; font-size: 10px; }
  .viewtools input[type="range"] { width: 74px; }
  .hint { display: none; }
  .prop-val { max-height: 130px; }
  .preview { max-height: 45vh; }
}