/* ── Reset & Variables ─────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --brand:        #2563eb;
  --brand-hover:  #1d4ed8;
  --bg-app:       #f0f2f5;
  --bg-panel:     #ffffff;
  --bg-section:   #f8f9fb;
  --bg-input:     #eef0f3;
  --bg-hover:     #e2e5ea;
  --border:       #d0d5dd;
  --border-focus: #2563eb;
  --text:         #111827;
  --text-muted:   #6b7280;
  --text-dim:     #9ca3af;
  --accent:       #2563eb;
  --danger:       #ef4444;
  --panel-w:      300px;
  --radius:       8px;
  --radius-sm:    5px;
  --transition:   150ms ease;
}

html, body { height: 100%; overflow: hidden; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; font-size: 13px; color: var(--text); background: var(--bg-app); }

/* ── App layout ────────────────────────────────── */
#app {
  display: flex;
  height: 100dvh;
  overflow: hidden;
}

/* ── Panel ─────────────────────────────────────── */
#panel {
  width: var(--panel-w);
  min-width: var(--panel-w);
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width var(--transition), min-width var(--transition);
  z-index: 10;
}
#panel.collapsed { width: 0; min-width: 0; }
#panel.collapsed #panel-header { display: none; }

#panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
#brand { display: flex; align-items: center; gap: 10px; }
#brand-name { display: block; font-weight: 800; font-size: 13px; color: var(--text); }
#brand-sub  { display: block; font-size: 10px; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: .06em; }

#panel-toggle {
  background: none; border: none; color: var(--text-muted); cursor: pointer;
  padding: 4px; border-radius: var(--radius-sm); display: flex; align-items: center;
  transition: color var(--transition);
}
#panel-toggle:hover { color: var(--text); }

#panel-body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
#panel-body::-webkit-scrollbar { width: 4px; }
#panel-body::-webkit-scrollbar-track { background: transparent; }
#panel-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ── Control groups ────────────────────────────── */
.control-group {
  background: var(--bg-section);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.group-title {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  margin-bottom: 2px;
}

/* ── Drop zone ─────────────────────────────────── */
#drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 20px 12px;
  text-align: center;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  color: var(--text-muted);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
  user-select: none;
}
#drop-zone:hover, #drop-zone.drag-over {
  border-color: var(--brand);
  color: var(--text);
  background: rgba(37,99,235,.07);
}
#drop-zone svg { color: var(--text-dim); margin-bottom: 4px; }
#drop-zone strong { color: var(--text); font-size: 13px; }
#drop-zone .hint { font-size: 11px; color: var(--text-dim); }

#image-info {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  border: 1px solid var(--border);
  word-break: break-all;
}

/* ── Toggle ────────────────────────────────────── */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  gap: 8px;
}
.toggle-label { flex: 1; font-size: 12px; color: var(--text); user-select: none; }
.toggle-wrap { flex-shrink: 0; position: relative; }
.toggle-wrap input { position: absolute; opacity: 0; width: 0; height: 0; }
.toggle-track {
  display: block;
  width: 36px; height: 20px;
  background: var(--bg-input);
  border-radius: 10px;
  border: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
  position: relative;
}
.toggle-track::after {
  content: '';
  position: absolute;
  left: 3px; top: 3px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--text-dim);
  transition: left var(--transition), background var(--transition);
}
.toggle-wrap input:checked + .toggle-track { background: var(--brand); border-color: var(--brand); }
.toggle-wrap input:checked + .toggle-track::after { left: 19px; background: #fff; }
.toggle-wrap input:focus-visible + .toggle-track { outline: 2px solid var(--brand); outline-offset: 2px; }

/* ── Sub-controls ──────────────────────────────── */
.sub-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 4px;
  border-top: 1px solid var(--border);
}

/* ── Color trigger ─────────────────────────────── */
.color-trigger-row { display: flex; flex-direction: column; gap: 5px; }
.field-label { font-size: 11px; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: .05em; }

#color-trigger {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 6px;
  cursor: pointer;
  transition: border-color var(--transition);
}
#color-trigger:hover { border-color: var(--brand); }
#color-swatch {
  width: 22px; height: 22px;
  border-radius: 4px;
  border: 1px solid rgba(255,255,255,.15);
  flex-shrink: 0;
  background: #000;
}
#color-hex {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 12px;
  font-family: monospace;
  cursor: text;
}

/* ── Color picker popover ──────────────────────── */
#color-picker {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
  position: relative;
  z-index: 100;
}

#sv-square {
  width: 100%;
  aspect-ratio: 5/3;
  border-radius: 5px;
  position: relative;
  cursor: crosshair;
  flex-shrink: 0;
  overflow: visible;
}

#sv-cursor {
  position: absolute;
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,.5);
  transform: translate(-50%, -50%);
  pointer-events: none;
  top: 0; left: 0;
}

#hue-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

#eyedropper-btn {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
#eyedropper-btn:hover { color: var(--text); border-color: var(--brand); background: rgba(37,99,235,.12); }
#eyedropper-btn.active { color: var(--brand); border-color: var(--brand); background: rgba(37,99,235,.2); }

#hue-slider-wrap { flex: 1; }
#hue-slider {
  width: 100%;
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(to right,
    hsl(0,100%,50%), hsl(30,100%,50%), hsl(60,100%,50%), hsl(90,100%,50%),
    hsl(120,100%,50%), hsl(150,100%,50%), hsl(180,100%,50%), hsl(210,100%,50%),
    hsl(240,100%,50%), hsl(270,100%,50%), hsl(300,100%,50%), hsl(330,100%,50%), hsl(360,100%,50%));
  position: relative;
  cursor: pointer;
}
#hue-cursor {
  position: absolute;
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,.5);
  top: -1px;
  transform: translateX(-50%);
  pointer-events: none;
}

#rgb-fields {
  display: flex;
  gap: 6px;
}
.rgb-field {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}
.rgb-field input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 12px;
  text-align: center;
  padding: 4px 2px;
  outline: none;
}
.rgb-field input:focus { border-color: var(--brand); }
.rgb-field span { font-size: 10px; color: var(--text-muted); font-weight: 700; }

/* ── Sliders ────────────────────────────────────── */
.slider-row { display: flex; flex-direction: column; gap: 5px; }
.slider-header { display: flex; justify-content: space-between; font-size: 12px; }
.slider-header span:first-child { color: var(--text); }
.slider-header span:last-child  { color: var(--brand); font-weight: 700; font-variant-numeric: tabular-nums; }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%; height: 4px;
  background: var(--bg-input);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--brand);
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,.4);
  cursor: pointer;
  transition: background var(--transition);
}
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--brand);
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,.4);
  cursor: pointer;
}
input[type="range"]:focus-visible::-webkit-slider-thumb { outline: 2px solid var(--brand); outline-offset: 2px; }

/* ── Shape selector ────────────────────────────── */
#shape-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
}
.shape-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 7px 4px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
  font-size: 10px;
  font-weight: 600;
}
.shape-btn svg { width: 22px; height: 22px; }
.shape-btn:hover { color: var(--text); border-color: var(--brand); background: rgba(37,99,235,.08); }
.shape-btn.active { color: #fff; border-color: var(--brand); background: var(--brand); }

/* ── Custom mask ────────────────────────────────── */
.file-label {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-input);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-muted);
  transition: border-color var(--transition), color var(--transition);
}
.file-label:hover { border-color: var(--brand); color: var(--text); }

/* ── Actions ────────────────────────────────────── */
.actions-group { gap: 8px; }
.btn-primary {
  display: flex; align-items: center; justify-content: center; gap: 7px;
  width: 100%;
  background: var(--brand);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 10px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition), opacity var(--transition);
}
.btn-primary:hover:not(:disabled) { background: var(--brand-hover); }
.btn-primary:disabled { opacity: .4; cursor: not-allowed; }

.btn-ghost {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius);
  padding: 7px;
  font-size: 12px;
  cursor: pointer;
  width: 100%;
  transition: color var(--transition), border-color var(--transition);
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-dim); }

/* ── Viewer ─────────────────────────────────────── */
#viewer {
  flex: 1;
  position: relative;
  overflow: hidden;
  background:
    repeating-conic-gradient(#dde2e8 0% 25%, #ebeef2 0% 50%)
    0 0 / 20px 20px;
}

#viewer-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transform-origin: 0 0;
}

#gl-canvas {
  display: block;
  image-rendering: auto;
  cursor: grab;
}
#gl-canvas.panning { cursor: grabbing; }
#gl-canvas.eyedropper-mode { cursor: crosshair; }

#empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-dim);
  pointer-events: none;
}
#empty-state p { font-size: 14px; }
#empty-state .hint { font-size: 12px; }

#webgl-error {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-muted);
  background: var(--bg-app);
}

#viewer-info {
  position: absolute;
  bottom: 10px;
  right: 12px;
  font-size: 10px;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}

/* ── Expand button (when panel collapsed) ──────── */
#panel-expand {
  position: absolute;
  top: 12px; left: 12px;
  z-index: 20;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px;
  color: var(--text-muted);
  cursor: pointer;
  display: none;
  align-items: center;
  transition: color var(--transition);
}
#panel-expand:hover { color: var(--text); }
#panel.collapsed ~ #panel-expand { display: flex; }

/* ── Modal ──────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
  padding: 20px;
}
.modal-box {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  max-width: 480px;
  width: 100%;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,.15);
}
.modal-box h2 { font-size: 17px; margin-bottom: 14px; }
.modal-box p { line-height: 1.6; color: var(--text-muted); font-size: 13px; margin-bottom: 10px; }
.modal-box hr { border: none; border-top: 1px solid var(--border); margin: 14px 0; }
.modal-box a { color: var(--brand); text-decoration: none; }
.modal-box a:hover { text-decoration: underline; }
.attribution { font-size: 12px; }
.mt-sm { margin-top: 8px; }

.modal-close {
  position: absolute; top: 12px; right: 14px;
  background: none; border: none; color: var(--text-muted);
  font-size: 18px; cursor: pointer; line-height: 1;
  padding: 4px;
  transition: color var(--transition);
}
.modal-close:hover { color: var(--text); }

/* ── Utilities ──────────────────────────────────── */
.hidden { display: none !important; }
.hint { font-size: 11px; color: var(--text-muted); }

/* ── Field row ──────────────────────────────────── */
.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

/* ── Background selector ────────────────────────── */
.bg-selector {
  display: flex;
  gap: 5px;
  align-items: center;
}
.bg-btn {
  width: 28px; height: 28px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  background: var(--bg-input);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition);
  padding: 2px;
  overflow: hidden;
  flex-shrink: 0;
}
.bg-btn:hover   { border-color: var(--text-muted); }
.bg-btn.active  { border-color: var(--brand); }
.bg-swatch {
  display: block;
  width: 100%; height: 100%;
  border-radius: 2px;
}
#bg-custom-color { display: none; }

/* ── DPI row ─────────────────────────────────────── */
.dpi-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
input[type="number"] {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 12px;
  padding: 4px 6px;
  outline: none;
  width: 70px;
  text-align: center;
  -moz-appearance: textfield;
}
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { opacity: 0.5; }
input[type="number"]:focus { border-color: var(--brand); }

/* ── Physical info (DPI/meters) ─────────────────── */
.physical-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
}
.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
}
.info-row span:first-child { color: var(--text-muted); }
.info-row span:last-child  { color: var(--text); font-weight: 700; font-variant-numeric: tabular-nums; }
.meters-value { color: var(--brand) !important; font-size: 12px !important; }

/* ── CMYK presets ────────────────────────────────── */
.cmyk-btns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  margin-top: 2px;
}
.cmyk-btn {
  padding: 5px 2px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  transition: color var(--transition), border-color var(--transition);
}
.cmyk-btn:hover { color: var(--text); border-color: var(--brand); }

/* ── Knockout slots ──────────────────────────────── */
.ko-slot { display: flex; flex-direction: column; gap: 4px; }
.ko-enable-row {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}
.ko-enable-row .toggle-wrap { flex-shrink: 0; }
.ko-slot-label { font-size: 12px; color: var(--text); }
.ko-color-row  {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
input[type="color"].ko-native-color {
  width: 44px; height: 26px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-input);
  cursor: pointer;
  padding: 2px;
  flex-shrink: 0;
}

/* ── Select ──────────────────────────────────────── */
select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 12px;
  padding: 5px 8px;
  outline: none;
  cursor: pointer;
  width: 100%;
}
select:focus { border-color: var(--brand); }

/* ── Presets ─────────────────────────────────────── */
.preset-save-row, .preset-load-row {
  display: flex;
  gap: 5px;
  align-items: center;
}
.preset-save-row input[type="text"] {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 12px;
  padding: 5px 8px;
  outline: none;
}
.preset-save-row input[type="text"]:focus { border-color: var(--brand); }
.preset-save-row input[type="text"]::placeholder { color: var(--text-dim); }
.preset-load-row select { flex: 1; }
.btn-icon {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  padding: 5px 9px;
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.btn-icon:hover { color: var(--text); border-color: var(--text-dim); }
.btn-icon.danger:hover { color: var(--danger); border-color: var(--danger); }

/* ── Export format row ───────────────────────────── */
.export-format-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.export-format-row select { flex: 1; }
.export-format-row .field-label { white-space: nowrap; }

/* ── DPI indicator (floating, top of viewer) ────── */
#dpi-indicator {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 8;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  pointer-events: none;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(0,0,0,.1);
  background: rgba(255,255,255,.92);
  transition: opacity .3s;
}
.dpi-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
  display: block;
}

/* Green — OK */
#dpi-indicator.dpi-ok   { color: #15803d; border-color: rgba(34,197,94,.4); }
#dpi-indicator.dpi-ok   .dpi-dot {
  background: #22c55e;
  box-shadow: 0 0 7px #22c55e;
  animation: blink-green 1.8s ease-in-out infinite;
}
/* Red — bad */
#dpi-indicator.dpi-low  { color: #dc2626; border-color: rgba(239,68,68,.4); }
#dpi-indicator.dpi-low  .dpi-dot {
  background: #ef4444;
  box-shadow: 0 0 7px #ef4444;
  animation: blink-red 0.9s ease-in-out infinite;
}
/* Amber — no metadata */
#dpi-indicator.dpi-unknown { color: #92400e; border-color: rgba(245,158,11,.4); }
#dpi-indicator.dpi-unknown .dpi-dot {
  background: #f59e0b;
  box-shadow: 0 0 6px #f59e0b;
  animation: blink-green 2.4s ease-in-out infinite;
}

@keyframes blink-green {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.25; }
}
@keyframes blink-red {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.15; }
}

/* ── Secondary button ────────────────────────────── */
.btn-secondary {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  font-size: 11px;
  cursor: pointer;
  width: 100%;
  text-align: center;
  transition: color var(--transition), border-color var(--transition);
}
.btn-secondary:hover { color: var(--text); border-color: var(--text-dim); }

/* ── Mode selector ──────────────────────────────── */
#mode-selector {
  display: flex;
  gap: 3px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3px;
}
.mode-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px 4px;
  background: none;
  border: none;
  border-radius: calc(var(--radius) - 2px);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.mode-btn:not(.active):hover { color: var(--text); background: var(--bg-hover); }
.mode-btn.active { background: var(--brand); color: #fff; }

/* ── Serigraphy section ─────────────────────────── */
.seri-tabs {
  display: flex;
  gap: 4px;
}
.seri-tab {
  flex: 1;
  padding: 6px 4px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.seri-tab:hover { color: var(--text); border-color: var(--text-dim); }
.seri-tab.active { background: var(--brand); border-color: var(--brand); color: #fff; }

#seri-chips {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.seri-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px;
}
.seri-thumb {
  width: 56px;
  height: 56px;
  border-radius: 4px;
  flex-shrink: 0;
  border: 1px solid var(--border);
  image-rendering: pixelated;
}
.seri-chip-color {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,.2);
  align-self: flex-start;
  margin-top: 2px;
}
.seri-chip-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.seri-chip-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
}
.seri-chip-hex {
  font-size: 11px;
  font-family: monospace;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.seri-chip-pct {
  font-size: 10px;
  color: var(--text-muted);
  flex-shrink: 0;
  font-weight: 700;
}
.seri-export-btn { font-size: 11px; padding: 4px 8px; }

/* ── Simulated process per-chip angle controls ── */
.seri-angle-row {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.seri-angle-btns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3px;
}
.seri-angle-btn { font-size: 9px; padding: 4px 2px; }
.seri-angle-btn.active {
  color: var(--brand);
  border-color: var(--brand);
  background: rgba(37,99,235,.12);
}

/* ── Responsive ─────────────────────────────────── */
@media (max-width: 640px) {
  :root { --panel-w: 100%; }
  #app { flex-direction: column; }
  #panel {
    width: 100%;
    min-width: 100%;
    height: auto;
    max-height: 55vh;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  #viewer { flex: 1; min-height: 0; }
}