:root {
  --background: #070b14;
  --panel: #0f1726;
  --panel-light: #151f31;
  --border: #263449;
  --text: #f3f6fb;
  --muted: #93a4bb;
  --accent: #67a6ff;
  --accent-soft: rgba(103, 166, 255, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--background);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system,
    BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 14px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 11, 20, 0.94);
}

.brand h1 {
  margin: 0;
  font-size: 21px;
}

.brand p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.model-badge {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  cursor: default;
  font-size: 13px;
  user-select: none;
}

.explorer {
  display: grid;
  grid-template-columns: 220px 260px minmax(0, 1fr);
  min-height: calc(100vh - 72px);
}

.sidebar,
.channel-panel {
  border-right: 1px solid var(--border);
  background: var(--panel);
}

.sidebar {
  padding: 24px 14px;
}

.section-label {
  margin: 0 10px 15px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.layer-list {
  display: grid;
  gap: 5px;
}

.layer-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 11px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  text-align: left;
}

.layer-button:hover,
.layer-button.active {
  border-color: var(--border);
  background: var(--accent-soft);
}

.layer-button.active {
  color: var(--accent);
}

.layer-count {
  color: var(--muted);
  font-size: 11px;
}

.channel-panel {
  padding: 24px 16px;
}

.channel-heading {
  margin: 0 0 14px;
  font-size: 17px;
}

.channel-search {
  width: 100%;
  margin-bottom: 16px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  background: #080e19;
  color: var(--text);
}

.channel-search:focus {
  border-color: var(--accent);
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 7px;
  max-height: calc(100vh - 190px);
  overflow-y: auto;
  padding-right: 4px;
}

.channel-button {
  padding: 8px 4px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #0a111e;
  color: var(--muted);
  cursor: pointer;
  font-family: ui-monospace, monospace;
  font-size: 11px;
}

.channel-button:hover,
.channel-button.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text);
}

.content {
  min-width: 0;
  padding: 26px;
}

.neuron-header {
  margin-bottom: 22px;
}

.neuron-header h2 {
  margin: 0;
  font-size: 25px;
}

.neuron-header p {
  margin: 6px 0 0;
  color: var(--muted);
}

.neuron-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(420px, 1.2fr);
  gap: 24px;
  align-items: start;
}

.activation-panel {
  position: sticky;
  top: 24px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
}

.panel-title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.image-frame {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 9px;
  background: #050810;
}

.image-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.placeholder {
  color: var(--muted);
  text-align: center;
}

.examples-panel {
  min-width: 0;
}

.examples-heading {
  margin: 0 0 14px;
  font-size: 18px;
}

.example-placeholder {
  padding: 36px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 1000px) {
  .explorer {
    grid-template-columns: 190px 230px minmax(0, 1fr);
  }

  .neuron-layout {
    grid-template-columns: 1fr;
  }

  .activation-panel {
    position: static;
  }
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    gap: 12px;
    padding: 14px 18px;
  }

  .model-badge {
    display: none;
  }

  .explorer {
    display: block;
  }

  .sidebar,
  .channel-panel {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .channel-grid {
    max-height: 220px;
    grid-template-columns: repeat(6, 1fr);
  }

  .content {
    padding: 20px 16px;
  }
}

.example-card {
  margin-bottom: 18px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
}

.example-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13px;
}

.example-header strong {
  color: var(--text);
}

.example-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.example-images figure {
  min-width: 0;
  margin: 0;
}

.example-images figcaption {
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 12px;
}

.example-images img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 8px;
  background: #050810;
  object-fit: contain;
}

.example-source {
  margin: 12px 0 0;
  color: var(--muted);
  font-family: ui-monospace, monospace;
  font-size: 11px;
}

.missing-image {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  margin: 0;
  border: 1px dashed var(--border);
  border-radius: 8px;
  color: var(--muted);
}

@media (max-width: 520px) {
  .example-images {
    grid-template-columns: 1fr;
  }
}
.enlargeable-image {
  cursor: zoom-in;
}

.enlargeable-image:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.image-modal[hidden] {
  display: none;
}

.image-modal {
  position: fixed;
  z-index: 1000;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 30px;
  background: rgba(2, 6, 15, 0.94);
  backdrop-filter: blur(8px);
}

.modal-content {
  display: grid;
  gap: 14px;
  width: min(1100px, 100%);
  max-height: calc(100vh - 60px);
}

.modal-content img {
  display: block;
  max-width: 100%;
  max-height: calc(100vh - 125px);
  margin: auto;
  border-radius: 10px;
  object-fit: contain;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
}

.modal-footer p {
  margin: 0;
}

.modal-footer a {
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
}

.modal-close {
  position: fixed;
  top: 20px;
  right: 24px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  font-size: 30px;
  line-height: 1;
}

.modal-close:hover {
  border-color: var(--accent);
}

body.modal-open {
  overflow: hidden;
}

@media (max-width: 600px) {
  .image-modal {
    padding: 18px;
  }

  .modal-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }
}
.neuron-navigation {
  display: flex;
  gap: 9px;
  margin-top: 15px;
}

.neuron-navigation button {
  padding: 9px 13px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

.neuron-navigation button:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.neuron-navigation button:disabled {
  cursor: not-allowed;
  opacity: 0.4;
}
@media (max-width: 760px) {
  .sidebar {
    padding: 16px 12px 10px;
    overflow: hidden;
  }

  .sidebar .section-label {
    margin: 0 4px 10px;
  }

  .layer-list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 0 2px 10px;
    scrollbar-width: thin;
  }

  .layer-button {
    flex: 0 0 auto;
    width: auto;
    min-width: 118px;
  }

  .channel-panel {
    padding: 16px 14px;
  }

  .channel-grid {
    grid-template-columns:
      repeat(auto-fill, minmax(52px, 1fr));
    max-height: 210px;
  }

  .content {
    padding: 22px 14px;
  }

  .neuron-layout {
    grid-template-columns: 1fr;
  }

  .activation-panel {
    width: min(100%, 560px);
    margin: 0 auto;
  }

  .examples-panel {
    margin-top: 6px;
  }

  .neuron-navigation {
    flex-wrap: wrap;
  }
}

@media (max-width: 520px) {
  .site-header {
    min-height: 64px;
  }

  .brand h1 {
    font-size: 18px;
  }

  .brand p {
    font-size: 12px;
  }

  .neuron-header h2 {
    font-size: 22px;
  }

  .channel-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .activation-panel {
    padding: 12px;
  }

  .example-card {
    padding: 12px;
  }

  .example-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }
}

.skeleton {
  position: relative;
  overflow: hidden;
  background: #162033;
}

.skeleton::after {
  position: absolute;
  inset: 0;
  content: "";
  transform: translateX(-100%);
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.07),
    transparent
  );
  animation: skeleton-shimmer 1.4s infinite;
}

.activation-skeleton {
  width: 100%;
  height: 100%;
}

.skeleton-card {
  pointer-events: none;
}

.skeleton-line {
  width: 42%;
  height: 13px;
  margin-bottom: 15px;
  border-radius: 5px;
}

.skeleton-image {
  aspect-ratio: 1;
  border-radius: 8px;
}

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

@keyframes skeleton-shimmer {
  to {
    transform: translateX(100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .skeleton::after {
    animation: none;
  }
}

.retry-button {
  display: block;
  margin: 14px auto 0;
  padding: 9px 14px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--text);
  cursor: pointer;
}

.retry-button:hover {
  background: rgba(103, 166, 255, 0.22);
}

.retry-button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.about-button {
  padding: 8px 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
}

.about-button:hover {
  border-color: var(--accent);
  color: var(--text);
}

.about-dialog {
  width: min(620px, calc(100% - 32px));
  max-height: calc(100vh - 50px);
  overflow-y: auto;
  padding: 30px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel);
  color: var(--text);
}

.about-dialog::backdrop {
  background: rgba(2, 6, 15, 0.85);
  backdrop-filter: blur(5px);
}

.about-dialog h2 {
  margin: 0 40px 18px 0;
}

.about-dialog h3 {
  margin: 22px 0 7px;
  color: var(--accent);
  font-size: 15px;
}

.about-dialog p {
  color: var(--muted);
  line-height: 1.65;
}

.about-dialog .about-note {
  padding: 13px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
}

.about-close {
  position: absolute;
  top: 16px;
  right: 18px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 28px;
}

.dataset-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--accent);
  text-decoration: none;
}

@media (max-width: 520px) {
  .about-dialog {
    padding: 24px 20px;
  }

  .model-badge {
    display: none;
  }
}

.examples-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.examples-title-row .examples-heading {
  margin: 0;
}

.display-controls {
  display: flex;
  gap: 5px;
}

.display-controls button {
  padding: 6px 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
}

.display-controls button:first-child {
  border-radius: 7px 0 0 7px;
}

.display-controls button:last-child {
  border-radius: 0 7px 7px 0;
}

.display-controls button.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text);
}

.examples-panel[data-display-mode="full"]
.crop-example {
  display: none;
}

.examples-panel[data-display-mode="crop"]
.full-example {
  display: none;
}

.examples-panel[data-display-mode="full"]
.example-images,
.examples-panel[data-display-mode="crop"]
.example-images {
  grid-template-columns: 1fr;
}

@media (max-width: 560px) {
  .examples-title-row {
    align-items: flex-start;
    flex-direction: column;
  }
}
button:focus-visible,
a:focus-visible,
[role="button"]:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.layer-button:focus-visible,
.channel-button:focus-visible {
  position: relative;
  z-index: 1;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 28px;
  border-top: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: 12px;
}

.site-footer p {
  margin: 0;
}

.site-footer nav {
  display: flex;
  gap: 16px;
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px;
  }
}