:root {
  --bg: #1b1d22;
  --panel: #2a2d34;
  --panel2: #34373f;
  --fg: #e6e8ec;
  --muted: #9aa0aa;
  --accent: #4c8dff;
  --border: #3a3e47;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font: 13px/1.4 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

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

.brand {
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .2px;
  margin-right: 4px;
}

#topbar label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  white-space: nowrap;
}

#topbar label.chk { color: var(--fg); }

#topbar select {
  background: var(--panel2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 6px;
}

#topbar button, .file-btn {
  background: var(--panel2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 9px;
  cursor: pointer;
}
#topbar button:hover, .file-btn:hover { background: #41454e; }
#topbar button:disabled { opacity: .4; cursor: default; }

.file-btn {
  font-weight: 600;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.file-btn:hover { background: #3b7af0; }

#topbar a.manual-link {
  background: var(--panel2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 9px;
  text-decoration: none;
  white-space: nowrap;
}
#topbar a.manual-link:hover { background: #41454e; }

#topbar input.num {
  width: 78px;
  background: var(--panel2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 5px;
  font-variant-numeric: tabular-nums;
}

.sep {
  width: 1px;
  align-self: stretch;
  background: var(--border);
  margin: 0 2px;
}

/* ---- cube / velocity bar ---- */
#cubeBar {
  position: absolute;
  left: 50%;
  bottom: 14px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  background: rgba(34, 37, 43, .92);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,.4);
  backdrop-filter: blur(4px);
  max-width: 90%;
}
#cubeBar.hidden { display: none; }
#cubeBar button {
  background: var(--panel2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 8px;
  cursor: pointer;
  font-size: 12px;
}
#cubeBar button:hover { background: #41454e; }
#cubeBar button.playing { background: var(--accent); border-color: var(--accent); color: #fff; }
#cubeSlider { width: clamp(140px, 30vw, 360px); accent-color: var(--accent); }
#cubeLabel { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
#cubeBar .vel { color: var(--accent); font-weight: 600; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ---- frame toolbar ---- */
#framebar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 5px 10px;
  background: var(--panel2);
  border-bottom: 1px solid var(--border);
}
#framebar .rb-label {
  font-weight: 600; color: var(--muted);
  text-transform: uppercase; font-size: 11px; letter-spacing: .5px;
}
#framebar button {
  background: var(--panel); color: var(--fg);
  border: 1px solid var(--border); border-radius: 4px;
  padding: 3px 9px; cursor: pointer;
}
#framebar button:hover { background: #41454e; }
#framebar button.active { background: var(--accent); border-color: var(--accent); color: #fff; }
#framebar label { color: var(--fg); display: inline-flex; align-items: center; gap: 4px; }
#frameIndicator { color: var(--fg); font-variant-numeric: tabular-nums; min-width: 42px; text-align: center; }
#framebar .hint { color: var(--muted); font-size: 11px; }

#frameTabs { display: inline-flex; gap: 3px; flex-wrap: wrap; max-width: 52vw; }
#frameTabs:empty::before { content: '(no frames)'; color: var(--muted); font-size: 11px; }
.ftab {
  display: inline-flex; align-items: center; gap: 5px;
  background: var(--panel); color: var(--fg);
  border: 1px solid var(--border); border-radius: 4px;
  padding: 2px 6px; cursor: pointer; font-size: 11px; white-space: nowrap;
}
.ftab:hover { background: #41454e; }
.ftab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.ftab .badge {
  font-size: 9px; font-weight: 700; padding: 0 3px; border-radius: 3px;
  background: rgba(255,255,255,.18);
}
.ftab .fclose { opacity: .6; font-weight: 700; }
.ftab .fclose:hover { opacity: 1; }

/* ---- table toolbar ---- */
#tablebar {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 5px 10px; background: var(--panel2); border-bottom: 1px solid var(--border);
}
#tablebar.hidden { display: none; }
#tablebar .rb-label { font-weight: 600; color: var(--muted); text-transform: uppercase; font-size: 11px; letter-spacing: .5px; }
#tablebar label { color: var(--muted); display: inline-flex; align-items: center; gap: 4px; }
#tablebar select { background: var(--panel); color: var(--fg); border: 1px solid var(--border); border-radius: 4px; padding: 2px 5px; }
#tablebar button { background: var(--panel); color: var(--fg); border: 1px solid var(--border); border-radius: 4px; padding: 3px 9px; cursor: pointer; }
#tablebar button:hover { background: #41454e; }
#tablebar .hint { color: var(--muted); font-size: 11px; }

/* ---- region toolbar ---- */
#regionbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 5px 10px;
  background: var(--panel2);
  border-bottom: 1px solid var(--border);
}
#regionbar .rb-label {
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: .5px;
}
#regionbar label { color: var(--muted); display: inline-flex; align-items: center; gap: 4px; }
#regionbar select {
  background: var(--panel);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 5px;
}
.rb-tools { display: inline-flex; gap: 2px; }
.rb-tools button {
  background: var(--panel);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  width: 30px;
  height: 26px;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.rb-tools button:hover { background: #41454e; }
.rb-tools button.active { background: var(--accent); border-color: var(--accent); color: #fff; }
#regionbar > button {
  background: var(--panel);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 9px;
  cursor: pointer;
}
#regionbar > button:hover { background: #41454e; }
.file-btn.small { padding: 3px 9px; font-weight: 600; }

#regionList {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 180px;
  overflow-y: auto;
  font: 11px/1.3 ui-monospace, Menlo, monospace;
}
#regionList li {
  padding: 3px 6px;
  border: 1px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--fg);
}
#regionList li:hover { background: var(--panel2); }
#regionList li.sel { background: rgba(76,141,255,.22); border-color: var(--accent); }
#regionList .swatch { width: 9px; height: 9px; border-radius: 2px; flex: 0 0 auto; }
#regionList .empty { color: var(--muted); cursor: default; }
#regionList li.empty:hover { background: none; }

#regionStats {
  margin: 0; white-space: pre-wrap;
  font: 11px/1.5 ui-monospace, Menlo, monospace;
  color: var(--fg);
}
#regionStats .empty { color: var(--muted); }
.modal-head #plotExport {
  font-size: 13px; background: var(--panel); color: var(--fg);
  border: 1px solid var(--border); border-radius: 4px; padding: 2px 9px; cursor: pointer;
}
.modal-head #plotExport:hover { background: #41454e; }

/* ---- workspace: canvas + sidebar ---- */
#workspace {
  flex: 1;
  display: flex;
  min-height: 0;
}

main {
  flex: 1;
  position: relative;
  overflow: hidden;
}

#sidebar {
  width: 200px;
  flex: 0 0 200px;
  background: var(--panel);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.panel h3 {
  margin: 0 0 5px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--muted);
}
.panel canvas {
  display: block;
  width: 100%;
  background: #15171b;
  border: 1px solid var(--border);
  border-radius: 4px;
  image-rendering: pixelated;
}
#colorbarCanvas { height: 18px; image-rendering: auto; }
.cbticks {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  margin-top: 2px;
}
#pixtable {
  width: 100%;
  border-collapse: collapse;
  font: 10px/1 ui-monospace, Menlo, monospace;
  table-layout: fixed;
}
#pixtable td {
  border: 1px solid var(--border);
  text-align: center;
  padding: 2px 0;
  color: var(--fg);
  overflow: hidden;
  white-space: nowrap;
}
#pixtable td.ctr { background: var(--accent); color: #fff; font-weight: 700; }

.coordsel { color: var(--muted); display: inline-flex; align-items: center; gap: 4px; }
.coordsel select {
  background: var(--panel2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 4px;
  font-size: 12px;
}

#canvasWrap {
  position: absolute;
  inset: 0;
  background:
    repeating-conic-gradient(#202227 0% 25%, #25272d 0% 50%) 50%/24px 24px;
}

#view {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  image-rendering: pixelated;
}

#dropHint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 15px;
  pointer-events: none;
  text-align: center;
  padding: 20px;
}
#canvasWrap.has-image #dropHint { display: none; }
#canvasWrap.dragover { outline: 2px dashed var(--accent); outline-offset: -8px; }

/* ---- status bar ---- */
#statusbar {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  padding: 5px 12px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
#statusbar span { white-space: nowrap; }
#stValue, #stWcs { color: var(--fg); }

/* ---- header modal ---- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
.modal.hidden { display: none; }
.modal-box {
  width: min(760px, 92vw);
  height: min(80vh, 700px);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--panel2);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}
.modal-head button {
  background: none;
  border: none;
  color: var(--fg);
  font-size: 20px;
  cursor: pointer;
  line-height: 1;
}
#headerText {
  margin: 0;
  padding: 12px;
  overflow: auto;
  font: 12px/1.45 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  white-space: pre;
  color: var(--fg);
}

/* plot modal */
.plot-box { width: min(780px, 94vw); height: auto; }
.modal-head select {
  background: var(--panel); color: var(--fg);
  border: 1px solid var(--border); border-radius: 4px; padding: 2px 6px;
}
.plot-title { color: var(--muted); font-weight: 400; margin-left: 8px; font-size: 12px; }
#plotCanvas { display: block; width: 100%; background: #15171b; }
.plot-hint { padding: 6px 12px; color: var(--muted); font-size: 11px; border-top: 1px solid var(--border); }

/* RGB modal */
.rgb-box { width: min(620px, 94vw); height: auto; }
.rgb-body { padding: 14px; }
.rgb-note { margin: 0 0 12px; color: var(--muted); font-size: 12px; }
.rgb-row { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; color: var(--muted); }
.rgb-tag { font-weight: 700; width: 16px; }
.rgb-name { flex: 1; color: var(--fg); font: 12px ui-monospace, Menlo, monospace; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rgb-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px; }
.rgb-actions button { background: var(--panel2); color: var(--fg); border: 1px solid var(--border); border-radius: 4px; padding: 5px 12px; cursor: pointer; }
.rgb-actions button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.rgb-actions button:hover { filter: brightness(1.1); }