:root {
  color-scheme: light;
  --air-red: #da0e2b;
  --air-aubergine: #6f1d53;
  --ink: #20232a;
  --line: #e3ddd4;
  --paper: #f4f1eb;
}

* { box-sizing: border-box; }

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

body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

.document-shell {
  height: 100%;
  display: grid;
  grid-template-rows: 76px minmax(0, 1fr);
}

.document-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 0 clamp(22px, 5vw, 76px);
  background: #fff;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 5px 18px rgba(32, 35, 42, .08);
}

.document-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--air-red) 0 62%, #9e7947 62% 100%);
}

.document-logo {
  display: block;
  width: 158px;
  height: auto;
}

.document-title {
  padding-left: 22px;
  border-left: 1px solid var(--line);
}

.document-title strong {
  display: block;
  font-size: 16px;
  line-height: 1.2;
}

.document-title span {
  display: block;
  margin-top: 3px;
  font-size: 11px;
  letter-spacing: .12em;
  color: #746d70;
  text-transform: uppercase;
}

.view-chip {
  margin-left: auto;
  padding: 7px 11px;
  border-radius: 999px;
  background: #f8eef2;
  color: var(--air-aubergine);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.close-link {
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  padding: 10px 15px;
  border: 1px solid #cfc7be;
  border-radius: 7px;
  background: #fff;
}

.close-link:hover {
  color: var(--air-red);
  border-color: var(--air-red);
}

.viewer {
  min-height: 0;
  background: #dad7d1;
}

.viewer iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
}

@media (max-width: 680px) {
  .document-shell { grid-template-rows: 66px minmax(0, 1fr); }
  .document-header { padding: 0 16px; gap: 12px; }
  .document-logo { width: 124px; }
  .document-title { display: none; }
  .view-chip { font-size: 9px; padding: 6px 8px; }
  .close-link { padding: 8px 11px; }
}