:root {
  color-scheme: light;
  --pd-ink: #14202b;
  --pd-muted: #536172;
  --pd-border: #d8e1ea;
  --pd-paper: #ffffff;
  --pd-bg: #f2f6f8;
  --pd-deep: #102a43;
  --pd-accent: #177e89;
  --pd-warm: #c84b31;
}

body {
  background:
    linear-gradient(180deg, #eaf3f6 0, var(--pd-bg) 280px);
  color: var(--pd-ink);
}

.pd-site-header,
.pd-site-footer {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.pd-site-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 24px;
  padding: 18px 22px;
  border: 1px solid rgba(16, 42, 67, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 16px 40px rgba(16, 42, 67, 0.08);
  backdrop-filter: blur(10px);
}

.pd-brand {
  display: grid;
  gap: 2px;
}

.pd-brand strong {
  color: var(--pd-deep);
  font-size: 18px;
}

.pd-brand span,
.pd-site-footer {
  color: var(--pd-muted);
  font-size: 13px;
}

.pd-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pd-nav a {
  border: 1px solid var(--pd-border);
  border-radius: 7px;
  color: var(--pd-deep);
  padding: 7px 10px;
  background: var(--pd-paper);
}

.pd-nav a:hover {
  border-color: var(--pd-accent);
  color: var(--pd-accent);
  text-decoration: none;
}

.pd-site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-top: 22px;
  padding: 18px 4px 8px;
  border-top: 1px solid rgba(16, 42, 67, 0.12);
}

.pd-record-mark {
  color: var(--pd-warm);
  font-weight: 700;
}

.pd-doc-view {
  padding: 28px 20px 36px;
}

.pd-doc-view article {
  box-shadow: 0 20px 60px rgba(16, 42, 67, 0.08);
}

@media (max-width: 720px) {
  .pd-site-header,
  .pd-site-footer {
    width: calc(100% - 24px);
    align-items: flex-start;
    flex-direction: column;
  }

  .pd-doc-view {
    padding-inline: 12px;
  }
}