:root {
  --panel-gap: 1rem;
  --clr-channel-r: var(--clr-danger, var(--clr-data-red, var(--pal-red, #f85149)));
  --clr-channel-g: var(--clr-status-success, var(--clr-data-green, var(--pal-green, #3fb950)));
  --clr-channel-b: var(--clr-data-blue, var(--pal-blue, #58a6ff));
  --clr-channel-c: color-mix(in oklab, var(--clr-data-blue, var(--pal-blue, #58a6ff)) 82%, white);
  --clr-channel-y: var(--clr-data-amber, var(--pal-amber, #d29922));
  --clr-channel-m: var(--clr-data-purple, var(--pal-purple, #bc8cff));
}

body {
  font-size: var(--txt-ui, 14px);
}

.header-controls { flex-shrink: 0; }

/* Shared controls live in /assets/shared/controls.css. */

main {
  display: grid;
  gap: var(--panel-gap);
}

.panel {
  overflow: hidden;
  border-radius: var(--radius);
}

.panel-header {
  margin-bottom: 0;
}

.panel-header h2 {
  margin: 0;
  font-size: var(--txt-lg, 1.03rem);
}

.panel-block {
  margin-top: 0;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: var(--txt-w-semibold, 600);
}

input[type='file'],
select {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
  color: var(--clr-text);
  padding: 10px 12px;
}

.source-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
  position: relative;
}

.workflow-symbols {
  display: none;
}

@media (min-width: 1280px) {
  .source-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 44px;
  }

  .workflow-symbols {
    display: block;
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
  }

  .workflow-symbol {
    position: absolute;
    top: var(--workflow-top, 62%);
    transform: translate(-50%, -50%);
    font-size: var(--txt-display, 2.2rem);
    font-weight: var(--txt-w-extrabold, 800);
    color: color-mix(in oklab, var(--clr-primary) 35%, var(--clr-muted));
    opacity: .75;
    text-shadow: 0 0 12px color-mix(in oklab, var(--clr-primary) 25%, transparent);
    user-select: none;
  }

  .workflow-plus-1 { left: var(--workflow-x1, 25%); }
  .workflow-plus-2 { left: var(--workflow-x2, 50%); }
  .workflow-eq { left: var(--workflow-x3, 75%); }

  .source-card {
    position: relative;
    z-index: 1;
  }
}

@media (min-width: 860px) and (max-width: 1279px) {
  .source-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.source-card {
  border: 1px solid var(--clr-border);
  border-radius: 12px;
  padding: 12px;
  background: var(--clr-surface);
  transition: border-color .12s ease, box-shadow .12s ease;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.source-card.drag-over {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--clr-primary) 35%, transparent);
}

.subpanel-header {
  padding: 0 0 .55rem;
  border-bottom: 1px solid color-mix(in oklab, var(--clr-border) 75%, transparent);
  margin-bottom: .1rem;
}

.subpanel-header h2 {
  margin: 0;
  font-size: var(--txt-base, .95rem);
  font-weight: var(--txt-w-semibold, 600);
}


.source-card-header {
  gap: 0;
  border-bottom: none;
}

.source-inline {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 96px;
  gap: 8px;
  align-items: center;
}

.mode-custom .source-inline {
  grid-template-columns: minmax(0, 1fr) 96px;
}

.file-picker-wrap {
  min-width: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px;
  align-items: center;
}

.file-picker-btn {
  margin: 0;
  white-space: nowrap;
  cursor: pointer;
}

.file-name {
  min-width: 0;
  color: var(--clr-muted);
  font-size: var(--txt-md-plus, .88rem);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.source-inline select {
  min-height: 34px;
  padding: .42rem .55rem;
  border-radius: 6px;
  font-size: var(--txt-sm-plus, .8rem);
  text-align: center;
  font-weight: var(--txt-w-bold, 700);
}

.custom-color-control {
  display: none;
  grid-template-columns: 96px;
  gap: 8px;
  align-items: center;
  position: relative;
}

.mode-custom .source-inline select {
  display: none;
}

.mode-custom .custom-color-control {
  display: grid;
}

.custom-color-swatch {
  width: 100%;
  height: 34px;
  border: 1px solid var(--clr-border);
  border-radius: 6px;
  background: var(--swatch, #808080);
  padding: 0;
  cursor: pointer;
}

.custom-color-swatch:hover {
  border-color: var(--clr-primary);
}

.custom-color-fields {
  display: none;
  gap: 6px;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: 220px;
  padding: 8px;
  border: 1px solid color-mix(in oklab, var(--clr-border) 75%, transparent);
  border-radius: 8px;
  background: color-mix(in oklab, var(--clr-panel) 92%, var(--clr-surface));
  box-shadow: var(--shadow-panel);
  z-index: 12;
}

.custom-color-control.open .custom-color-fields {
  display: grid;
}

.custom-color-native {
  width: 100%;
  height: 44px;
  border: 1px solid var(--clr-border);
  border-radius: 6px;
  background: var(--clr-surface);
  padding: 3px;
  cursor: pointer;
}

.custom-color-native::-webkit-color-swatch-wrapper {
  padding: 0;
}

.custom-color-native::-webkit-color-swatch,
.custom-color-native::-moz-color-swatch {
  border: 0;
  border-radius: 4px;
}

.custom-color-hex {
  min-height: 34px;
  border-radius: 6px;
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
  color: var(--clr-text);
  font-size: var(--txt-sm-plus, .8rem);
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  text-transform: uppercase;
  letter-spacing: .02em;
  padding: .4rem .5rem;
}

.custom-color-hex:focus {
  outline: 2px solid color-mix(in oklab, var(--clr-primary) 55%, transparent);
  outline-offset: 1px;
}

.custom-rgb-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
}

.custom-rgb-field {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.custom-rgb-label {
  font-size: var(--txt-2xs, .68rem);
  font-weight: var(--txt-w-bold, 700);
  color: var(--clr-muted);
  text-align: center;
  line-height: 1;
}

.custom-rgb-input {
  min-height: 30px;
  border-radius: 6px;
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
  color: var(--clr-text);
  text-align: center;
  font-size: var(--txt-sm, .76rem);
  font-variant-numeric: tabular-nums;
  padding: .32rem .4rem;
}

.custom-rgb-input:focus {
  outline: 2px solid color-mix(in oklab, var(--clr-primary) 55%, transparent);
  outline-offset: 1px;
}

.custom-rgb-input::-webkit-outer-spin-button,
.custom-rgb-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.custom-rgb-input[type='number'] {
  appearance: textfield;
  -moz-appearance: textfield;
}

.custom-palette-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.palette-chip {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  border: 1px solid color-mix(in oklab, var(--clr-border) 72%, transparent);
  background: var(--chip, #808080);
  padding: 0;
  cursor: pointer;
}

.palette-chip:hover {
  border-color: var(--clr-primary);
}

.source-inline select.channel-r {
  border-color: color-mix(in oklab, var(--clr-channel-r) 52%, var(--clr-border));
  background: color-mix(in oklab, var(--clr-channel-r) 16%, var(--clr-surface));
  color: color-mix(in oklab, var(--clr-channel-r) 85%, var(--clr-text));
}

.source-inline select.channel-g {
  border-color: color-mix(in oklab, var(--clr-channel-g) 52%, var(--clr-border));
  background: color-mix(in oklab, var(--clr-channel-g) 16%, var(--clr-surface));
  color: color-mix(in oklab, var(--clr-channel-g) 85%, var(--clr-text));
}

.source-inline select.channel-b {
  border-color: color-mix(in oklab, var(--clr-channel-b) 52%, var(--clr-border));
  background: color-mix(in oklab, var(--clr-channel-b) 16%, var(--clr-surface));
  color: color-mix(in oklab, var(--clr-channel-b) 85%, var(--clr-text));
}

.source-inline select.channel-c {
  border-color: color-mix(in oklab, var(--clr-channel-c) 52%, var(--clr-border));
  background: color-mix(in oklab, var(--clr-channel-c) 16%, var(--clr-surface));
  color: color-mix(in oklab, var(--clr-channel-c) 85%, var(--clr-text));
}

.source-inline select.channel-y {
  border-color: color-mix(in oklab, var(--clr-channel-y) 52%, var(--clr-border));
  background: color-mix(in oklab, var(--clr-channel-y) 16%, var(--clr-surface));
  color: color-mix(in oklab, var(--clr-channel-y) 85%, var(--clr-text));
}

.source-inline select.channel-m {
  border-color: color-mix(in oklab, var(--clr-channel-m) 52%, var(--clr-border));
  background: color-mix(in oklab, var(--clr-channel-m) 16%, var(--clr-surface));
  color: color-mix(in oklab, var(--clr-channel-m) 85%, var(--clr-text));
}

.preview-wrap {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--clr-border);
  background: var(--clr-chart-bg);
}

.source-card canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 0;
  border: 0;
  background: transparent;
}

.preview-actions {
  position: absolute;
  top: 8px;
  right: 8px;
  display: inline-flex;
  gap: 6px;
  z-index: 3;
}



.icon-trash,
.icon-trash svg {
  width: 14px;
  height: 14px;
  display: block;
}



.drop-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  text-align: center;
  font-size: var(--txt-sm, .78rem);
  color: var(--clr-muted);
  pointer-events: none;
}

.source-card.has-image:not(.has-sample) .drop-overlay {
  display: none;
}

.source-card.has-sample .drop-overlay {
  inset: 1px;
  color: color-mix(in oklab, white 86%, var(--clr-text));
  font-size: var(--txt-sm, .76rem);
  font-weight: var(--txt-w-semibold, 600);
  border-radius: 9px;
  text-shadow: 0 1px 1px color-mix(in oklab, black 30%, transparent);
  background:
    linear-gradient(
      180deg,
      color-mix(in oklab, black 12%, transparent) 0%,
      color-mix(in oklab, black 34%, transparent) 100%
    );
}

.output-card .preview-wrap {
  margin-top: auto;
}

.image-modal {
  width: auto;
  height: auto;
  display: flex;
  flex-direction: column;
  max-width: none;
  max-height: none;
  border: none;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  margin: 0;
  padding: 0;
}

#image-modal-overlay {
  z-index: 2200;
  align-items: center;
  padding-top: 0;
  background: var(--clr-overlay-strong);
  backdrop-filter: blur(2px);
}

.image-modal-controls {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.modal-view-group {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.is-hidden {
  display: none !important;
}

.modal-view-label {
  margin: 0;
  font-size: var(--txt-sm, .76rem);
  color: var(--clr-muted);
}

.mode-toggle,
.view-control .shared-segmented-group,
.modal-view-group .shared-segmented-group {
  margin-left: 0;
}

.shared-segmented-sm {
  border-radius: 6px;
}

.image-modal-body {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  min-height: 0;
  position: relative;
}

.btn-modal-nav {
  flex: 0 0 auto;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
}

#btn-image-prev {
  left: 10px;
}

#btn-image-next {
  right: 10px;
}

#image-modal-canvas {
  width: auto;
  height: auto;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 760px) {
  .image-modal {
    width: auto;
    height: auto;
    border-radius: 8px;
  }

  .image-modal-controls {
    gap: 6px;
  }

  .modal-view-label {
    display: none;
  }

  .shared-segmented-sm .btn-ghost {
    min-width: 66px;
  }

  .btn-modal-nav.shared-nav-btn {
    width: 30px;
    height: 30px;
    flex-basis: 30px;
  }

  #btn-image-prev { left: 6px; }
  #btn-image-next { right: 6px; }

}

.mode-actions-row {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 12px 14px;
}

.mode-view-cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap:  1.5rem;
  flex: 1 1 auto;
}

.mode-control {
  min-width: 0;
  max-width: none;
}

.view-control {
  min-width: 0;
  width: auto;
}

.custom-presets-col {
  min-width: 0;
}

.custom-presets-col {
  margin-top: 0;
  display: none;
}

.mode-custom .custom-presets-col {
  display: block;
}

.custom-presets-label {
  display: block;
  color: var(--clr-muted);
  font-size: var(--txt-sm, .76rem);
  font-weight: var(--txt-w-semibold, 600);
  margin-bottom: 4px;
}

.custom-presets {
  margin-left: 0;
}

.controls-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.status-row {
  padding-top: .5rem;
}

.output-edit-panel {
  display: grid;
  gap: 12px;
  padding: .75rem 1rem;
  border: 1px solid color-mix(in oklab, var(--clr-border) 75%, transparent);
  border-radius: var(--radius);
  background: color-mix(in oklab, var(--clr-panel) 90%, var(--clr-surface));
}

.output-edit-header {
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: -.75rem -1rem 0;
  padding: .7rem 1rem .55rem;
  border-bottom: 1px solid color-mix(in oklab, var(--clr-border) 75%, transparent);
}

.output-edit-header h2 {
  margin: 0;
}

.output-edit-hint {
  margin-top: -4px;
}

.output-edit-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 16px;
}

.hint {
  margin: 0;
  color: var(--clr-muted);
  font-size: var(--txt-md-plus, 0.92rem);
}

.hint[data-type='error'] {
  color: var(--clr-status-error);
}

.hint[data-type='ok'] {
  color: var(--clr-status-success);
}

#output-canvas {
  width: 100%;
  height: auto;
  border-radius: 0;
  border: 0;
  background: transparent;
}

@media (max-width: 980px) {
  .mode-view-cluster {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .mode-control {
    max-width: none;
    width: 100%;
  }

  .view-control {
    width: 100%;
  }

  .view-control .shared-segmented-group {
    width: 100%;
  }

  .view-control .shared-segmented-group .btn-ghost {
    flex: 1 1 0;
  }

  .source-inline {
    grid-template-columns: 1fr;
  }

  .mode-custom .source-inline {
    grid-template-columns: minmax(0, 1fr) 96px;
  }

  .file-picker-wrap {
    grid-template-columns: 1fr;
  }

  .custom-color-control {
    grid-template-columns: 96px;
  }

  .custom-color-fields {
    width: min(220px, calc(100vw - 56px));
  }

  .output-edit-grid {
    grid-template-columns: 1fr;
  }
}


/* --- Custom Color Picker Dialog --- */
.custom-color-modal {
  position: fixed;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  padding: 0;
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
  border-radius: var(--radius);
  color: var(--clr-text);
  width: min(360px, 92vw);
  max-width: 90vw;
  max-height: min(92vh, 640px);
  overflow: hidden;
  box-shadow: var(--shadow-dialog);
}
.custom-color-modal::backdrop {
  background: var(--clr-overlay-tinted);
  backdrop-filter: blur(2px);
}
.custom-color-modal[open] {
  display: flex;
  flex-direction: column;
}
.custom-color-modal .panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--clr-border);
  padding: .7rem 1rem;
}
.custom-color-modal .panel-header h2 {
  font-size: var(--txt-base-plus, 1rem);
  margin: 0;
}
#btn-close-color {
  width: 30px;
  height: 30px;
  min-width: 30px;
  padding: 0;
}
.color-picker-body {
  padding: .75rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.custom-color-map-wrap {
  display: grid;
  gap: .35rem;
}
.custom-color-map-label,
.custom-hue-label,
.custom-palette-label {
  display: block;
  color: var(--clr-muted);
  font-size: var(--txt-sm, .76rem);
  font-weight: var(--txt-w-semibold, 600);
}
.custom-color-map {
  position: relative;
  width: 100%;
  height: 160px;
  border-radius: var(--radius);
  border: 1px solid var(--clr-border);
  background: transparent;
  cursor: crosshair;
  overflow: hidden;
}

.custom-color-map::before,
.custom-color-map::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
}

.custom-color-map::before {
  background: hsl(var(--picker-hue, 0deg), 100%, 50%);
}

.custom-color-map::after {
  background-image:
    linear-gradient(to top, #000 0%, transparent 100%),
    linear-gradient(to right, #fff 0%, rgba(255,255,255,0) 100%);
}
.custom-color-map-thumb {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  border: 2px solid #fff;
  box-shadow: var(--shadow-thumb-ring);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 2;
}
.custom-hue-wrap {
  display: grid;
  gap: .35rem;
  margin: 0;
}
.custom-hue-range {
  width: 100%;
  margin: 0;
  -webkit-appearance: none;
  appearance: none;
  height: 14px;
  border: 1px solid var(--clr-border);
  border-radius: 999px;
  background:
    linear-gradient(to right,
      #ff0000 0%, #ffff00 16.6%, #00ff00 33.3%,
      #00ffff 50%, #0000ff 66.6%, #ff00ff 83.3%, #ff0000 100%);
}
.custom-hue-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  border: 2px solid #fff;
  background: var(--clr-primary);
  box-shadow: var(--shadow-thumb-ring);
}
.custom-hue-range::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  border: 2px solid #fff;
  background: var(--clr-primary);
  box-shadow: var(--shadow-thumb-ring);
}
.custom-color-modal .custom-rgb-row {
  display: flex;
  gap: 0.5rem;
}
.custom-color-modal .custom-color-hex {
  width: 100%;
}
.custom-color-modal .custom-palette-row {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
}
.custom-color-modal .palette-chip {
  width: 20px;
  height: 20px;
  justify-self: center;
  border-radius: 999px;
  border: 0;
  box-shadow:
    0 0 0 1px var(--clr-border),
    0 0 0 1px color-mix(in oklab, var(--clr-surface) 70%, transparent) inset;
}