:root {
  --viewer-accent: #9a8103;
  --viewer-text: #3f403c;
  --viewer-surface: #fff;
  --viewer-footer: #252622;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
}

body {
  overflow: hidden;
  background: var(--viewer-footer);
  color: var(--viewer-text);
  font-family: Arial, Helvetica, sans-serif;
}

.document-viewer__header {
  display: flex;
  min-height: 54px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px clamp(16px, 4vw, 48px);
  border-bottom: 1px solid var(--viewer-accent);
  background: var(--viewer-footer);
  color: #f7f5ef;
  font-size: 15px;
}

.document-viewer__header a {
  color: #f7f5ef;
  font-weight: 700;
  text-decoration: none;
}

.document-viewer__header a:is(:hover, :focus-visible) {
  color: #fff;
  outline: 2px solid var(--viewer-accent);
  outline-offset: 4px;
}

.document-viewer__main {
  position: relative;
  height: calc(100% - 54px);
  background: #eae7de;
}

.document-viewer__main iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--viewer-surface);
}

.document-viewer__fallback {
  position: absolute;
  top: 16px;
  left: 50%;
  z-index: -1;
  margin: 0;
  transform: translateX(-50%);
}

.document-viewer__return {
  position: fixed;
  right: 50%;
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 10;
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border: 2px solid #fff;
  background: var(--viewer-accent);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  transform: translateX(50%);
}

.document-viewer__return:is(:hover, :focus-visible) {
  background: var(--viewer-footer);
  outline: 2px solid var(--viewer-accent);
  outline-offset: 3px;
}

@media (max-width: 600px) {
  .document-viewer__header {
    min-height: 48px;
    padding: 8px 12px;
    font-size: 13px;
  }

  .document-viewer__main {
    height: calc(100% - 48px);
  }

  .document-viewer__return {
    bottom: max(10px, env(safe-area-inset-bottom));
    width: calc(100% - 24px);
  }
}