:root {
  color-scheme: dark;
  --bg: #000;
  --panel: #121212;
  --text: #fff;
  --muted: #888;
  --faint: #646464;
  --button: #8a8a8a;
  --button-hover: #a6a6a6;
  --highlight: #fff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Arial, sans-serif;
}

a,
button {
  color: inherit;
  font: inherit;
}

a {
  text-decoration: none;
}

button {
  border: 0;
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  height: 58px;
  padding: 9px 28px 0;
  background: #000;
}

.brand {
  display: grid;
  gap: 1px;
  line-height: 1;
}

.brand-name {
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.brand-line {
  font-size: 8px;
  font-weight: 800;
}

.nav {
  display: flex;
  gap: 31px;
  font-size: 18px;
  font-weight: 900;
  line-height: 1;
}

.nav a {
  transition: color 160ms ease;
}

.nav a:hover {
  color: #bfbfbf;
}

main {
  min-height: 100vh;
  background: #000;
}

.demo-screen,
.picker-screen {
  display: none;
}

.demo-screen.is-active,
.picker-screen.is-active {
  display: block;
}

.demo-screen {
  min-height: 100vh;
  padding: 82px 56px 34px;
}

.task-carousel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(210px, 1fr) minmax(270px, 1fr) minmax(220px, 1fr);
  align-items: end;
  min-height: 206px;
  gap: 42px;
}

.task-card {
  display: grid;
  justify-items: center;
  text-align: center;
  transition:
    transform 260ms ease,
    opacity 260ms ease,
    color 260ms ease,
    filter 260ms ease;
}

.task-card h1,
.task-card h2,
.task-card p {
  margin: 0;
}

.task-card h1 {
  font-size: 44px;
  font-weight: 900;
  line-height: 1.28;
}

.task-card h2 {
  font-size: 27px;
  font-weight: 900;
  line-height: 1.23;
}

.task-card.is-center h2 {
  font-size: 44px;
  line-height: 1.28;
}

.task-card p {
  max-width: 340px;
  margin-top: 23px;
  font-size: 12px;
  font-weight: 750;
  line-height: 1.35;
}

.task-card.is-center {
  grid-column: 2;
  grid-row: 1;
  color: #fff;
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: none;
}

.task-card.is-left {
  grid-column: 1;
  grid-row: 1;
  color: #7f7f7f;
  opacity: 0.86;
  transform: translateY(8px) scale(0.92);
}

.task-card.is-right {
  grid-column: 3;
  grid-row: 1;
  color: #7f7f7f;
  opacity: 0.86;
  transform: translateY(8px) scale(0.92);
}

.task-card.is-side h1,
.task-card.is-side h2 {
  font-size: 27px;
}

.controls-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 29px;
  margin-top: 25px;
}

.download-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 158px;
  height: 29px;
  border-radius: 999px;
  background: var(--button);
  color: #fff;
  font-size: 14px;
  font-weight: 850;
  transition: background 160ms ease;
}

.download-button:hover {
  background: var(--button-hover);
}

.round-button {
  display: inline-grid;
  place-items: center;
  width: 31px;
  height: 31px;
  border-radius: 50%;
  background: var(--button);
  color: #fff;
  cursor: pointer;
  font-size: 18px;
  font-weight: 900;
  line-height: 1;
  transition: background 160ms ease, transform 160ms ease;
}

.round-button:hover {
  background: var(--button-hover);
  transform: translateY(-1px);
}

.image-comparison {
  display: grid;
  grid-template-columns: minmax(280px, 389px) auto minmax(280px, 389px);
  justify-content: space-between;
  align-items: start;
  gap: 30px;
  margin-top: 42px;
}

body.mode-fine .image-comparison {
  margin-bottom: 28px;
}

.image-panel {
  margin: 0;
  text-align: center;
}

.comparison-arrow {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-top: 130px;
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: 50%;
  color: #fff;
  font-size: 18px;
  font-weight: 900;
  line-height: 1;
}

.image-stage {
  position: relative;
  width: 100%;
  height: 290px;
  overflow: hidden;
  background: #151515;
}

.image-stage img {
  width: 100%;
  height: 100%;
  object-fit: fill;
}

.box-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.det-box {
  position: absolute;
  border: 1.5px solid var(--box-color);
  pointer-events: auto;
  transition:
    border-color 120ms ease,
    box-shadow 120ms ease,
    opacity 120ms ease,
    background 120ms ease;
}

.det-box.is-muted {
  opacity: 0.22;
}

.det-box.is-highlight {
  z-index: 4;
  opacity: 1;
  border-color: var(--highlight);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.7),
    0 0 14px color-mix(in srgb, var(--box-color) 75%, white);
  background: color-mix(in srgb, var(--box-color) 12%, transparent);
}

.det-box.show-label::after {
  content: attr(data-category);
  position: absolute;
  left: -1.5px;
  bottom: calc(100% + 4px);
  max-width: 220px;
  padding: 3px 6px;
  overflow: hidden;
  border-radius: 3px;
  background: #000;
  color: #fff;
  font-size: 11px;
  font-weight: 900;
  line-height: 1.1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hierarchy-panel {
  display: none;
  width: min(940px, 100%);
  margin: 0 auto 24px;
  color: #fff;
}

body.mode-fine .hierarchy-panel {
  display: block;
}

.hierarchy-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.hierarchy-header span {
  display: block;
  margin-bottom: 4px;
  color: #7f7f7f;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hierarchy-header strong {
  display: block;
  font-size: 18px;
  font-weight: 900;
}

.hierarchy-toggle {
  display: flex;
  gap: 7px;
}

.hierarchy-mode {
  min-width: 64px;
  height: 28px;
  border: 1px solid #777;
  border-radius: 999px;
  background: transparent;
  color: #aaa;
  cursor: pointer;
  font-size: 12px;
  font-weight: 850;
}

.hierarchy-mode.is-active,
.hierarchy-mode:hover {
  border-color: #fff;
  color: #000;
  background: #fff;
}

.hierarchy-content {
  min-height: 142px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 10px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.03);
  color: #8f8f8f;
  font-size: 13px;
  font-weight: 760;
}

.tree-view {
  display: grid;
  gap: 14px;
}

.tree-row {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.tree-label {
  color: #777;
  font-size: 11px;
  font-weight: 900;
  text-transform: uppercase;
}

.tree-nodes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  position: relative;
}

.tree-node,
.tree-more,
.tree-empty {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 5px;
  padding: 3px 10px;
  color: #fff;
  background: #050505;
  font-size: 12px;
  font-weight: 850;
  line-height: 1.15;
}

.tree-node.is-path {
  border-color: #fff;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.18);
}

.tree-node.is-target {
  border-color: #fff;
  background: #fff;
  color: #000;
}

.tree-node.is-dim {
  opacity: 0.34;
}

.tree-more,
.tree-empty {
  border-color: transparent;
  color: #aaa;
  background: transparent;
}

.graph-view {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.graph-card {
  min-height: 112px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  padding: 13px;
  background: rgba(255, 255, 255, 0.045);
}

.graph-card.is-target {
  border-color: #fff;
  background: #fff;
  color: #000;
}

.graph-card span {
  display: block;
  margin-bottom: 9px;
  color: inherit;
  opacity: 0.56;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.graph-card strong {
  display: block;
  font-size: 13px;
  line-height: 1.45;
}

figcaption {
  min-height: 22px;
  margin-top: 17px;
  color: #fff;
  font-size: 14px;
  font-weight: 850;
}

.text-button {
  padding: 0;
  background: transparent;
  cursor: pointer;
  font-weight: 850;
}

.text-button:hover {
  text-decoration: underline;
}

.picker-screen {
  min-height: 100vh;
  padding-top: 58px;
}

.picker-spacer {
  height: 119px;
  background: #000;
}

.picker-panel {
  min-height: calc(100vh - 177px);
  padding: 18px 7px 28px;
  background: var(--panel);
}

.picker-panel h1 {
  margin: 0 0 16px 21px;
  color: #fff;
  font-size: 14px;
  font-weight: 850;
}

.picker-back {
  float: left;
  margin: 1px 0 0 0;
  padding: 0;
  background: transparent;
  color: #fff;
  cursor: pointer;
  font-size: 11px;
}

.thumb-grid {
  clear: both;
  display: grid;
  grid-template-columns: repeat(6, minmax(120px, 1fr));
  grid-auto-flow: dense;
  gap: 7px;
  align-items: stretch;
}

.image-choice {
  position: relative;
  min-height: 108px;
  padding: 0;
  overflow: hidden;
  border: 2px solid transparent;
  background: #000;
  cursor: pointer;
}

.image-choice.is-wide {
  grid-column: span 2;
}

.image-choice.is-tall {
  grid-row: span 2;
}

.image-choice.is-selected {
  border-color: #fff;
}

.image-choice img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 180ms ease, filter 180ms ease;
}

.image-choice:hover img,
.image-choice.is-selected img {
  filter: brightness(1.08);
  transform: scale(1.025);
}

.status {
  position: fixed;
  right: 14px;
  bottom: 12px;
  z-index: 70;
  max-width: min(360px, calc(100vw - 28px));
  border-radius: 999px;
  padding: 7px 12px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 12px;
  font-weight: 750;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.status.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .site-header {
    align-items: center;
    height: auto;
    min-height: 58px;
    padding: 9px 20px;
  }

  .nav {
    gap: 16px;
    font-size: 15px;
  }

  .demo-screen {
    padding: 78px 20px 34px;
  }

  .task-carousel {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .task-card,
  .task-card.is-center,
  .task-card.is-left,
  .task-card.is-right {
    grid-column: 1;
    position: relative;
    transform: none;
  }

  .task-card.is-left,
  .task-card.is-right {
    display: none;
  }

  .image-comparison {
    grid-template-columns: 1fr;
    justify-content: center;
    gap: 16px;
  }

  .image-panel {
    max-width: 520px;
    margin: 0 auto;
    width: 100%;
  }

  .comparison-arrow {
    width: 28px;
    height: 28px;
    margin: 0 auto;
    transform: rotate(90deg);
  }

  .image-stage {
    height: auto;
  }

  .thumb-grid {
    grid-template-columns: repeat(3, minmax(90px, 1fr));
  }
}

@media (max-width: 560px) {
  .brand-line {
    display: none;
  }

  .nav {
    gap: 11px;
    font-size: 13px;
  }

  .task-card h1 {
    font-size: 36px;
  }

  .controls-row {
    gap: 12px;
  }

  .thumb-grid {
    grid-template-columns: repeat(2, minmax(100px, 1fr));
  }
}