.document-viewer {
  --viewer-primary: #173e35;
  --viewer-secondary: #657169;
  --viewer-accent: #d85d34;
  --viewer-background: #f5f3ed;
  --viewer-group: var(--viewer-primary);
  padding: 22px 0 56px;
  background: var(--viewer-background);
  color: #17201e;
}

.viewer-intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding-block: 18px 24px;
}

.viewer-intro h1 {
  margin: 3px 0 0;
  color: var(--viewer-primary);
  font: 500 clamp(1.75rem, 3vw, 2.7rem) / 1.05 Georgia, serif;
}

.viewer-intro > div > p:last-child {
  max-width: 620px;
  margin: 8px 0 0;
  color: #5d6865;
  font-size: .88rem;
}

.viewer-kicker {
  margin: 0;
  color: var(--viewer-secondary);
  font-size: .65rem;
  font-weight: 800;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.viewer-intro-meta {
  display: grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  min-width: 170px;
  column-gap: 7px;
}

.viewer-intro-meta strong {
  color: var(--viewer-accent);
  font: 500 2rem / 1 Georgia, serif;
}

.viewer-intro-meta span {
  font-size: .72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.viewer-intro-meta a {
  grid-column: 1 / -1;
  margin-top: 9px;
  color: var(--viewer-primary);
  font-size: .72rem;
  font-weight: 750;
}

.viewer-shell {
  width: min(1600px, calc(100% - 28px));
  margin: auto;
  overflow: hidden;
  border: 1px solid #d6ddd9;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 22px 65px #20352d19;
}

.viewer-toolbar {
  position: relative;
  z-index: 20;
  display: grid;
  grid-template-columns: auto minmax(180px, 1fr) auto auto auto;
  align-items: center;
  gap: 14px;
  min-height: 70px;
  padding: 10px 14px;
  border-bottom: 1px solid #dce2df;
  background: #fcfdfc;
}

.viewer-toolbar button,
.viewer-toolbar a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 12px;
  border: 1px solid #d3dad7;
  border-radius: 9px;
  background: #fff;
  color: #26322f;
  cursor: pointer;
  font: 750 .72rem / 1 inherit;
}

.viewer-toolbar button:hover,
.viewer-toolbar a:hover {
  border-color: var(--viewer-primary);
  color: var(--viewer-primary);
}

.viewer-toolbar button:disabled {
  opacity: .38;
  cursor: default;
}

.viewer-current-title {
  min-width: 0;
}

.viewer-current-title small,
.viewer-current-title strong {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.viewer-current-title small {
  color: var(--viewer-secondary);
  font-size: .59rem;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.viewer-current-title strong {
  margin-top: 3px;
  font-size: .9rem;
}

.viewer-toolbar-nav,
.viewer-zoom,
.viewer-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 5px;
}

.viewer-toolbar-nav a,
.viewer-toolbar-nav > span {
  display: grid;
  min-width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid #d3dad7;
  border-radius: 8px;
  color: #26322f;
  font-size: .72rem;
  font-weight: 800;
}

.viewer-toolbar-nav > span:nth-child(2) {
  min-width: 62px;
  border: 0;
}

.viewer-toolbar [aria-disabled='true'] {
  opacity: .35;
}

.viewer-zoom {
  gap: 4px;
}

.viewer-zoom button {
  min-width: 38px;
  padding: 0 9px;
}

.viewer-zoom button[data-fit-page],
.viewer-zoom button[data-fit-width] {
  min-width: 62px;
}

.viewer-zoom button[aria-pressed='true'] {
  border-color: var(--viewer-primary);
  background: color-mix(in srgb, var(--viewer-primary) 10%, white);
  color: var(--viewer-primary);
}

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

.viewer-workspace {
  position: relative;
  display: grid;
  grid-template-columns: 310px minmax(0, 1fr);
  height: min(78vh, 980px);
  min-height: 650px;
  background: #e9eeeb;
  transition: grid-template-columns .24s ease;
}

.viewer-shell.is-index-collapsed .viewer-workspace {
  grid-template-columns: 0 minmax(0, 1fr);
}

.viewer-index {
  position: relative;
  z-index: 10;
  min-width: 0;
  overflow: hidden;
  border-right: 1px solid #d6ddda;
  background: #f8faf9;
  transition: opacity .2s ease;
}

.viewer-shell.is-index-collapsed .viewer-index {
  opacity: 0;
  pointer-events: none;
}

.viewer-index > header {
  display: flex;
  min-width: 280px;
  align-items: center;
  justify-content: space-between;
  padding: 17px 16px 12px;
}

.viewer-index > header small,
.viewer-index > header strong {
  display: block;
}

.viewer-index > header small {
  color: var(--viewer-secondary);
  font-size: .58rem;
  font-weight: 800;
  letter-spacing: .11em;
  text-transform: uppercase;
}

.viewer-index > header strong {
  color: var(--viewer-primary);
  font: 500 1.28rem Georgia, serif;
}

.viewer-index > header button {
  display: none;
  border: 0;
  background: none;
  font-size: 1.7rem;
}

.viewer-index-scroll {
  width: 310px;
  height: calc(100% - 67px);
  overflow: auto;
  padding: 0 10px 22px;
}

.viewer-group {
  margin: 6px 0;
  border: 1px solid #dce2df;
  border-radius: 10px;
  background: #fff;
}

.viewer-group summary {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  min-height: 54px;
  align-items: center;
  gap: 7px;
  padding: 9px 11px;
  cursor: pointer;
  list-style: none;
}

.viewer-group summary::-webkit-details-marker {
  display: none;
}

.viewer-group summary > span:first-child {
  display: grid;
  width: 25px;
  height: 25px;
  place-items: center;
  border-radius: 7px;
  background: color-mix(in srgb, var(--group-accent, var(--viewer-group)) 14%, white);
  color: var(--group-accent, var(--viewer-group));
}

.viewer-group summary strong,
.viewer-group summary small {
  display: block;
}

.viewer-group summary strong {
  font-size: .75rem;
}

.viewer-group summary small {
  margin-top: 2px;
  color: #6b7773;
  font-size: .58rem;
}

.viewer-group summary b {
  color: #7b8782;
  font-size: .63rem;
}

.viewer-index-items {
  display: grid;
  gap: 3px;
  padding: 0 6px 7px;
}

.viewer-index-items a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  min-height: 43px;
  align-items: center;
  gap: 8px;
  padding: 5px;
  border-radius: 8px;
  color: #35413e;
}

.viewer-index-items a:hover {
  background: #edf2f0;
}

.viewer-index-items a[aria-current='page'] {
  background: color-mix(in srgb, var(--group-accent, var(--viewer-group)) 12%, white);
  color: var(--group-accent, var(--viewer-group));
  box-shadow: inset 3px 0 var(--group-accent, var(--viewer-group));
}

.viewer-index-items img {
  width: 36px;
  height: 47px;
  border-radius: 3px;
  background: #e5e9e7;
  object-fit: cover;
}

.viewer-index-items small,
.viewer-index-items strong {
  display: block;
}

.viewer-index-items small {
  color: #74807c;
  font-size: .56rem;
  font-weight: 800;
}

.viewer-index-items strong {
  overflow: hidden;
  font-size: .69rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.viewer-ungrouped {
  padding: 8px;
}

.viewer-backdrop {
  display: none;
}

.viewer-document {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-width: 0;
  min-height: 0;
  gap: 12px;
  overflow: hidden;
  padding: 20px 24px 24px;
}

.viewer-document-heading {
  display: flex;
  width: 100%;
  max-width: 1120px;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin: 0 auto;
}

.viewer-document-heading small {
  color: var(--viewer-group);
  font-size: .61rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.viewer-document-heading h2 {
  margin: 3px 0 0;
  font: 500 clamp(1.35rem, 2vw, 2rem) / 1.1 Georgia, serif;
}

.viewer-document-heading > span {
  color: #6f7b77;
  font-size: .68rem;
  font-weight: 800;
}

.viewer-canvas {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 0;
  max-width: 1120px;
  margin: auto;
  overflow: hidden;
  border: 1px solid #293330;
  border-radius: 10px;
  background: #222a28;
  overscroll-behavior: contain;
  touch-action: none;
}

.viewer-canvas.is-fit-page {
  overflow: hidden;
}

.viewer-canvas.is-fit-width {
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-gutter: stable;
}

.viewer-canvas.is-custom-zoom {
  overflow: auto;
}

.viewer-image-stage {
  display: grid;
  box-sizing: border-box;
  width: max-content;
  min-width: 100%;
  min-height: 100%;
  place-items: center;
  padding: 18px;
}

.viewer-canvas img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 100%;
  border-radius: 3px;
  box-shadow: 0 8px 30px #0006;
  user-select: none;
  -webkit-user-drag: none;
}

.viewer-canvas img.is-measured {
  max-width: none;
  max-height: none;
}

.viewer-canvas.is-zoomed {
  cursor: grab;
}

.viewer-canvas.is-dragging {
  cursor: grabbing;
  user-select: none;
}

.solution-file-missing {
  display: grid;
  height: 100%;
  place-content: center;
  padding: 30px;
  color: #fff;
  text-align: center;
}

.solution-file-missing span {
  color: var(--viewer-accent);
  font-size: 2.2rem;
}

.solution-file-missing strong {
  margin-top: 8px;
}

.solution-file-missing p {
  margin: 6px 0;
  color: #cfd8d4;
}

.viewer-bottom-nav {
  display: none;
}

.viewer-shell:fullscreen {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  width: 100%;
  max-width: none;
  height: 100%;
  border: 0;
  border-radius: 0;
}

.viewer-shell:fullscreen .viewer-workspace {
  height: auto;
  min-height: 0;
}

.viewer-shell:fullscreen .viewer-toolbar {
  min-height: 70px;
}

.viewer-shell:fullscreen .viewer-document {
  min-height: 0;
  padding-bottom: 16px;
}

.mode-document .viewer-current-title small,
.mode-document .viewer-document-heading small,
.mode-document .viewer-group summary small {
  display: none;
}

.mode-items .viewer-document-heading > span {
  display: none;
}

@media (max-width: 1050px) {
  .viewer-toolbar {
    grid-template-columns: auto minmax(100px, 1fr) auto auto auto;
    gap: 8px;
  }

  .toolbar-label {
    display: none;
  }

  .viewer-workspace {
    grid-template-columns: 260px minmax(0, 1fr);
  }

  .viewer-index-scroll {
    width: 260px;
  }

  .viewer-document {
    padding-inline: 16px;
  }

  .viewer-intro {
    padding-inline: 8px;
  }
}

@media (max-width: 760px) {
  .document-viewer {
    padding: 0 0 68px;
  }

  .viewer-intro {
    display: none;
  }

  .viewer-shell {
    width: 100%;
    overflow: visible;
    border-inline: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .viewer-toolbar {
    position: sticky;
    top: 0;
    z-index: 25;
    grid-template-columns: auto minmax(38px, 1fr) auto auto;
    gap: 4px;
    min-height: 58px;
    padding: 7px 8px;
  }

  .viewer-icon-button span:last-child,
  .viewer-toolbar-nav,
  .toolbar-label {
    display: none;
  }

  .viewer-current-title small {
    display: none;
  }

  .viewer-current-title strong {
    font-size: .7rem;
  }

  .viewer-zoom {
    gap: 2px;
  }

  .viewer-zoom button {
    min-width: 32px;
    min-height: 36px;
    padding: 0 5px;
    font-size: .66rem;
  }

  .viewer-zoom button[data-fit-page],
  .viewer-zoom button[data-fit-width] {
    min-width: 44px;
  }

  .viewer-toolbar-actions {
    gap: 3px;
  }

  .viewer-toolbar-actions button,
  .viewer-toolbar-actions a {
    min-width: 35px;
    min-height: 36px;
    padding: 0 6px;
  }

  .viewer-workspace,
  .viewer-shell.is-index-collapsed .viewer-workspace {
    display: block;
    height: calc(100vh - 210px);
    height: calc(100dvh - 210px);
    min-height: 0;
  }

  .viewer-document {
    height: 100%;
    gap: 8px;
    padding: 9px 8px 10px;
  }

  .viewer-document-heading {
    margin: 0 3px;
  }

  .viewer-document-heading h2 {
    font-size: 1.15rem;
  }

  .viewer-canvas {
    height: 100%;
    min-height: 0;
  }

  .viewer-image-stage {
    padding: 7px;
  }

  .viewer-index {
    position: fixed;
    z-index: 50;
    inset: 0 auto 0 0;
    width: min(88vw, 360px);
    border: 0;
    opacity: 1;
    box-shadow: 12px 0 45px #13201b52;
    pointer-events: auto;
    transform: translateX(-105%);
    transition: transform .22s ease;
  }

  .viewer-shell.is-index-open .viewer-index {
    transform: translateX(0);
  }

  .viewer-index > header {
    display: flex;
    width: 100%;
    min-width: 0;
    padding: 16px;
  }

  .viewer-index > header button {
    display: block;
    cursor: pointer;
  }

  .viewer-index-scroll {
    width: 100%;
    height: calc(100% - 67px);
    padding-bottom: 90px;
  }

  .viewer-backdrop {
    position: fixed;
    z-index: 45;
    inset: 0;
    display: block;
    background: #10191699;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s;
  }

  .viewer-shell.is-index-open .viewer-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .viewer-bottom-nav {
    position: fixed;
    z-index: 35;
    top: auto;
    right: 8px;
    bottom: 8px;
    left: 8px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 4px;
    padding: 5px;
    border: 1px solid #d7ddda;
    border-radius: 13px;
    background: #fffffff2;
    box-shadow: 0 10px 30px #1827212e;
    backdrop-filter: blur(10px);
  }

  .viewer-bottom-nav a,
  .viewer-bottom-nav > span,
  .viewer-bottom-nav button {
    display: flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    gap: 5px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: #26332f;
    font: 800 .71rem / 1 inherit;
  }

  .viewer-bottom-nav button {
    background: var(--viewer-primary);
    color: #fff;
  }

  .viewer-bottom-nav [aria-disabled='true'] {
    opacity: .35;
  }

  .viewer-shell:fullscreen {
    box-sizing: border-box;
    padding-bottom: 68px;
  }

  .viewer-shell:fullscreen .viewer-workspace {
    height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .viewer-workspace,
  .viewer-index,
  .viewer-backdrop {
    transition: none;
  }
}