* { box-sizing: border-box; }

:root {
  --bg: #0c0e14;
  --panel: #12151f;
  --panel2: #171b28;
  --border: #232636;
  --text: #cdd6ee;
  --dim: #5a6480;
  --cyan: #7fd4ff;
  --green: #5ad4a0;
  --amber: #e6b455;
}

html, body {
  margin: 0; height: 100%;
  background: var(--bg); color: var(--text);
  font: 13px "Cascadia Mono", "Consolas", monospace;
  overflow: hidden;
}

/* themed scrollbars */
* { scrollbar-width: thin; scrollbar-color: #2c3145 var(--panel); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--panel); }
::-webkit-scrollbar-thumb {
  background: #262b3d;
  border-radius: 5px;
  border: 2px solid var(--panel);
}
::-webkit-scrollbar-thumb:hover { background: #34506e; }
::-webkit-scrollbar-corner { background: var(--panel); }

body { display: flex; flex-direction: column; }

/* ---------------------------------------------------------------- topbar */

#topbar {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 10px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.logo { font-size: 15px; letter-spacing: 2px; color: var(--cyan); font-weight: bold; }
.logo span { color: var(--dim); font-weight: normal; }
.logo .bar { color: var(--dim); font-weight: normal; width: 6px; overflow: hidden; white-space: nowrap; display: inline-flex; transform: translate(-2px, 0px); }

#topbar label { display: flex; align-items: center; gap: 5px; color: var(--dim); white-space: nowrap; }
.chip {
  background: var(--panel2); border: 1px solid var(--border);
  padding: 2px 8px; color: var(--amber); min-width: 1.5em; text-align: center;
}
.spacer { flex: 1; }

input[type=text], input[type=number], select {
  background: var(--panel2); color: var(--text);
  border: 1px solid var(--border); padding: 3px 6px;
  font: inherit;
}
input[type=number] { width: 58px; }

button {
  background: var(--panel2); color: var(--text);
  border: 1px solid var(--border); padding: 4px 10px;
  font: inherit; cursor: pointer;
}
button:hover { background: #212739; border-color: #34405e; }
button.accent { color: var(--cyan); border-color: #2b4a63; }
button.wide { width: 100%; margin-top: 8px; }

.transport button { color: var(--green); font-size: 13px; }

#scope { border: 1px solid var(--border); background: var(--bg); }

/* ---------------------------------------------------------------- layout */

main { flex: 1; display: flex; min-height: 0; }

aside {
  width: 250px; min-width: 250px;
  background: var(--panel);
  overflow-y: auto;
  padding: 8px;
  display: flex; flex-direction: column; gap: 12px;
}
#left  { border-right: 1px solid var(--border); }
#right { border-left: 1px solid var(--border); width: 290px; min-width: 290px; }

#center { flex: 1; min-width: 0; position: relative; }
#tracker { display: block; outline: none; }

section h3 {
  margin: 0 0 6px;
  font-size: 11px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--dim);
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
}

.list { max-height: 180px; overflow-y: auto; margin-bottom: 6px; }
.listItem {
  padding: 3px 8px; cursor: pointer; color: var(--dim);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.listItem:hover { background: var(--panel2); }
.listItem.sel { background: #1d2740; color: var(--cyan); }

.btnRow { display: flex; gap: 4px; margin-top: 4px; }
.btnRow button { flex: 1; padding: 3px 4px; }

/* ------------------------------------------------------------ param rows */

.prow {
  display: flex; align-items: center; gap: 6px;
  margin: 3px 0;
}
.prow label { width: 92px; min-width: 92px; color: var(--dim); font-size: 12px; }
.prow input[type=range] { flex: 1; min-width: 0; accent-color: var(--cyan); height: 14px; }
.prow input[type=text] { flex: 1; min-width: 0; }
.prow select { flex: 1; }
.pval { width: 52px; text-align: right; color: var(--amber); font-size: 12px; }

/* ------------------------------------------------------- visuals / editor */

#paneDivider {
  flex: 0 0 5px; height: 5px;
  cursor: ns-resize;
  background: var(--border);
  border-top: 1px solid #2c3145;
}
#paneDivider:hover, #paneDivider.dragging { background: #34506e; }
#paneDivider[hidden] { display: none; }

#bottomPane {
  display: flex; flex-direction: column;
  height: 280px; min-height: 0; flex: 0 0 auto;
  background: var(--panel);
}
#bottomPane.collapsed { height: auto; }

#paneBar {
  flex: 0 0 26px;
  display: flex; align-items: center; gap: 10px;
  padding: 0 8px;
  background: var(--panel2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  font-size: 11px; color: var(--dim);
}
#paneBar button, #paneBar select { padding: 1px 8px; font-size: 11px; }
#editorApply.pending { color: var(--amber); border-color: #6e5a2b; }
#editorHint { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

#paneBody { flex: 1; display: flex; min-height: 0; }
#paneBody[hidden] { display: none; }
#editorArea { flex: 1; display: flex; min-width: 0; }
#visualPane {
  flex: 0 0 500px;   /* width overridden inline via the vertical divider */
  border-right: 1px solid var(--border);
}

#visDivider {
  flex: 0 0 5px;
  cursor: ew-resize;
  background: var(--border);
}
#visDivider:hover, #visDivider.dragging { background: #34506e; }
#visDivider[hidden] { display: none; }
#visualCanvas { width: 100%; height: 100%; display: block; background: #000; }
.editorSub { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.editorSub[hidden] { display: none; }
#shaderCode, #soundCode, #uiCode {
  flex: 1; min-height: 0;
  background: #0d0f16; color: #cdd6ee;
  border: 0; outline: none; resize: none;
  font: 12px "Cascadia Mono", "Consolas", monospace;
  line-height: 1.45;
  padding: 8px 10px;
  white-space: pre; overflow: auto;
  tab-size: 2;
}
#shaderErr, #soundErr, #uiErr {
  color: #e06080; font-size: 11px;
  padding: 3px 10px; min-height: 18px; max-height: 64px;
  overflow-y: auto; white-space: pre-wrap;
  border-top: 1px solid var(--border);
}
button.on { background: #1d2740; color: var(--cyan); border-color: #34506e; }

/* ---------------------------------------------------------------- footer */

footer {
  display: flex; align-items: center; gap: 12px;
  padding: 5px 12px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  color: var(--dim);
}
#prog { width: 220px; accent-color: var(--green); }

/* ------------------------------------------------------------------ help */

#helpOverlay[hidden] { display: none; }
#helpOverlay, .modal {
  position: fixed; inset: 0;
  background: rgba(5, 7, 12, 0.82);
  display: flex; align-items: center; justify-content: center;
  z-index: 10;
}
.modal[hidden] { display: none; }
.dlgBox {
  background: var(--panel);
  border: 1px solid #34405e;
  padding: 20px 26px;
  min-width: 300px;
}
.dlgBox h2 { margin: 0 0 14px; color: var(--cyan); font-size: 14px; letter-spacing: 2px; }
.dlgBox .prow label { width: 64px; min-width: 64px; }
.dlgBox .btnRow { margin-top: 16px; }
.helpBox {
  background: var(--panel);
  border: 1px solid #34405e;
  padding: 22px 30px;
  max-width: 560px;
}
.helpBox h2 { margin: 0 0 12px; color: var(--cyan); font-size: 15px; letter-spacing: 2px; }
.helpBox table { border-collapse: collapse; }
.helpBox td { padding: 3px 14px 3px 0; vertical-align: top; }
.helpBox td:first-child { color: var(--amber); white-space: nowrap; }
.helpBox p { color: var(--dim); margin-bottom: 0; }