:root {
  --page-bg: #edf3fb;
  --panel-bg: rgba(255, 255, 255, 0.9);
  --panel-border: #1d6995;
  --text-strong: #0f4b70;
  --text-muted: #7e9aaf;
  --track: #d2e8f4;
  --shadow: 0 5px 14px rgba(17, 72, 106, 0.14);
  --radius-lg: 5px;
  --radius-md: 3px;
  --radius-sm: 3px;
  --response-axis-width: 64px;
  --response-axis-gap: 6px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: linear-gradient(180deg, #f4f8fc 0%, var(--page-bg) 100%);
  color: var(--text-strong);
}

button,
input,
select {
  font: inherit;
}

.page-shell {
  min-height: 100vh;
  padding: 14px 18px;
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 42px;
  gap: 8px;
  align-items: stretch;
}

.main-column {
  display: grid;
  gap: 8px;
}

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.selector-panel {
  padding: 14px 18px 16px;
  height: 68px;
  display: block;
  overflow: hidden;
}

.figure-panel,
.stim-panel {
  padding: 14px 18px 16px;
}

.section-header,
.section-header-inline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 2px solid rgba(29, 105, 149, 0.18);
  padding-bottom: 10px;
}

/* .selector-panel .section-header-inline {
  border-bottom: none;
  padding-bottom: 0;
} */

.selector-panel .section-header.section-header-inline {
  height: 32px;
  min-height: 32px;
  display: flex;
  align-items: center;
  border-bottom: none !important;
  padding-bottom: 0 !important;
}

.section-header-inline h1,
.section-header-inline h2,
.section-header h2,
.swim-header {
  margin: 0;
}

h1,
h2,
.swim-header,
.fish-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-strong);
}

.stim-type-list {
  display: flex;
  flex-wrap: nowrap;
  justify-content: flex-end;
  gap: 6px;
}

.stim-type-button {
  min-width: 120px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: rgba(210, 232, 244, 0.48);
  color: var(--text-muted);
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease, background-color 120ms ease;
  white-space: nowrap;
}

.stim-type-button:hover,
.stim-type-button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(17, 72, 106, 0.12);
}

.stim-type-button.is-active {
  border-color: currentColor;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.ghost-button {
  border: none;
  border-radius: 6px;
  background: #7bc1ec;
  color: #ffffff;
  padding: 4px 10px;
  cursor: pointer;
}

.ghost-button:disabled,
.gallery-arrow:disabled {
  opacity: 0.45;
  cursor: default;
}

.y-axis-panel {
  position: relative;
  align-self: stretch;
  height: 100%;
}

.y-axis-track {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 34px;
  width: 2px;
  background: var(--track);
}

.axis-cap {
  position: absolute;
  background: var(--panel-border);
}

.axis-cap-top,
.axis-cap-bottom {
  left: -8px;
  width: 18px;
  height: 2px;
}

.axis-cap-top {
  top: 0;
}

.axis-cap-bottom {
  bottom: 0;
}

.axis-cap-left,
.axis-cap-right {
  top: -8px;
  width: 2px;
  height: 18px;
}

.axis-cap-left {
  left: 0;
}

.axis-cap-right {
  right: 0;
}

.fake-slider {
  position: absolute;
  display: grid;
  place-items: center;
  background: #c2e1f3;
  border: 2px solid var(--panel-border);
  border-radius: 999px;
  color: var(--text-strong);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  user-select: none;
  touch-action: none;
}

.fake-slider-vertical {
  left: -7px;
  width: 16px;
  cursor: grab;
}

.fake-slider-vertical .fake-slider-label {
  display: inline-block;
  transform: rotate(90deg);
}

.fake-slider-horizontal {
  top: -7px;
  height: 16px;
  cursor: grab;
}

.fake-slider-label {
  pointer-events: none;
}

.scrollbar-handle {
  position: absolute;
  background: rgba(15, 75, 112, 0.42);
  border-radius: 999px;
}

.scrollbar-handle-start,
.scrollbar-handle-end {
  z-index: 1;
}

.fake-slider-vertical .scrollbar-handle {
  left: 50%;
  width: 10px;
  height: 5px;
  margin-left: -5px;
  cursor: ns-resize;
}

.fake-slider-vertical .scrollbar-handle-start {
  top: 3px;
}

.fake-slider-vertical .scrollbar-handle-end {
  bottom: 3px;
}

.fake-slider-horizontal .scrollbar-handle {
  top: 50%;
  width: 5px;
  height: 10px;
  margin-top: -5px;
  cursor: ew-resize;
}

.fake-slider-horizontal .scrollbar-handle-start {
  left: 3px;
}

.fake-slider-horizontal .scrollbar-handle-end {
  right: 3px;
}

.axis-label {
  white-space: nowrap;
  font-size: 0.95rem;
}

.axis-label-vertical {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.figure-stack {
  display: grid;
  gap: 14px;
  padding-top: 14px;
}

.response-row {
  display: grid;
  grid-template-columns: var(--response-axis-width) minmax(0, 1fr);
  gap: var(--response-axis-gap);
  align-items: stretch;
}

.neuron-label {
  position: absolute;
  top: 0;
  left: -6px;
  pointer-events: none;
}

.image-stage {
  position: relative;
  min-height: 324px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.82);
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.image-stage.is-dragging {
  cursor: grabbing;
}

.image-stage.is-disabled {
  cursor: default;
}

.image-stage-shell {
  position: relative;
}

.interval-marker-strip {
  position: absolute;
  left: 0;
  top: -9px;
  width: 100%;
  height: 8px;
  overflow: hidden;
  pointer-events: none;
}

.image-viewport {
  position: absolute;
  inset: 0;
  transform-origin: top left;
  pointer-events: none;
}

.figure-overlay-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.figure-image,
.swim-image {
  display: block;
  width: 100%;
}

.figure-image {
  position: absolute;
  inset: 0;
  height: 100%;
  object-fit: fill;
}

.raster-image {
  z-index: 2;
}

.stim-overlay {
  z-index: 1;
}

.image-placeholder,
.swim-empty {
  display: grid;
  place-items: center;
  min-height: 100%;
  color: var(--text-muted);
  background:
    linear-gradient(135deg, rgba(184, 218, 238, 0.22), rgba(255, 255, 255, 0.72)),
    repeating-linear-gradient(-45deg, rgba(29, 105, 149, 0.06) 0 12px, transparent 12px 24px);
  text-align: center;
  padding: 24px;
}

.hidden {
  display: none !important;
}

.time-axis-panel {
  display: grid;
  gap: 10px;
  margin-left: calc(var(--response-axis-width) + var(--response-axis-gap));
}

.time-axis-track {
  position: relative;
  height: 2px;
  background: var(--track);
}

.time-axis-track,
.y-axis-track {
  user-select: none;
}

.time-axis-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.time-axis-start {
  font-size: 0.92rem;
}

.swim-panel {
  border-top: 2px solid rgba(29, 105, 149, 0.18);
  padding-top: 14px;
  margin-left: calc(var(--response-axis-width) + var(--response-axis-gap));
}

.swim-stage {
  position: relative;
  min-height: 44px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.swim-canvas,
.swim-image,
.swim-empty {
  position: absolute;
  inset: 0;
}

.swim-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.stim-gallery-shell {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 34px;
  gap: 10px;
  align-items: start;
  padding-top: 14px;
}

.gallery-arrow {
  border: none;
  background: transparent;
  color: var(--text-strong);
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  align-self: start;
  margin-top: 26px;
}

.stim-gallery {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scroll-behavior: smooth;
  scrollbar-width: none;
  padding: 4px 2px 2px;
}

.stim-gallery::-webkit-scrollbar {
  display: none;
}

.stim-card {
  flex: 0 0 92px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  align-self: flex-start;
  border-radius: var(--radius-sm);
  padding: 4px 4px 8px;
  border: 2px solid transparent;
  cursor: pointer;
  text-align: center;
  color: var(--text-strong);
  background: transparent;
}

.stim-card img,
.stim-card .stim-thumb-fallback {
  width: 94%;
  aspect-ratio: 1 / 1;
  margin: 0 auto;
  border-radius: 4px;
  object-fit: cover;
  background: rgba(255, 255, 255, 0.92);
  border: 2px solid var(--track);
}

.stim-thumb-fallback {
  display: grid;
  place-items: center;
  color: var(--text-muted);
  font-size: 0.72rem;
  padding: 8px;
  border: 1px dashed rgba(29, 105, 149, 0.25);
}

.stim-card span {
  display: block;
  min-height: 2.6em;
  font-size: 0.92rem;
  padding-top: 4px;
  line-height: 1.3;
}

.stim-card.is-active img,
.stim-card.is-active .stim-thumb-fallback {
  box-shadow: inset 0 0 0 5px var(--stim-accent, currentColor), 0 0 0 5px var(--stim-accent, currentColor);
}

/* .stim-card.is-active span {
  color: #ffffff;
  font-weight: 700;
} */

.fish-panel {
  position: relative;
  display: block;
  align-self: stretch;
  height: 100%;
  min-height: 0;
  padding: 8px 4px;
  overflow: hidden;
}

.fish-list-shell {
  position: absolute;
  left: 4px;
  right: 4px;
  top: var(--fish-list-top, 32px);
  bottom: 8px;
  display: grid;
  grid-template-rows: 22px minmax(0, 1fr) 22px;
  gap: 4px;
  min-height: 0;
}

.fish-arrow {
  border: none;
  background: transparent;
  color: var(--text-strong);
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  display: grid;
  place-items: center;
}

.fish-arrow:disabled {
  opacity: 0.35;
  cursor: default;
}

.fish-title {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  writing-mode: horizontal-tb;
  justify-self: center;
  margin-bottom: 0;
  font-size: 0.95rem;
  line-height: 1;
  white-space: nowrap;
}

.fish-list {
  overflow-y: auto;
  scrollbar-width: none;
  min-height: 0;
  padding: 2px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.fish-list::-webkit-scrollbar {
  display: none;
}

.fish-item {
  min-width: 32px;
  padding: 6px 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-strong);
  cursor: pointer;
}

.fish-item.is-active {
  font-weight: 700;
}

.status-banner {
  margin-bottom: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: #fff3cd;
  color: #845d09;
  border: 1px solid #f0d27d;
}

@media (max-width: 960px) {
  .page-shell {
    padding: 9px;
  }

  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .fish-panel {
    grid-template-columns: auto 1fr;
    grid-template-rows: 1fr;
    align-items: center;
    min-height: 90px;
  }

  .fish-title {
    position: static;
    top: auto;
    left: auto;
    transform: none;
    writing-mode: horizontal-tb;
    margin-bottom: 0;
    margin-right: 8px;
  }

  .fish-list {
    position: static;
    left: auto;
    right: auto;
    top: auto;
    bottom: auto;
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    justify-content: flex-start;
    padding: 0 2px;
  }

  .fish-item {
    min-width: 56px;
    padding: 8px 10px;
  }

  .stim-type-list {
    justify-content: flex-start;
  }
}