:root {
  --green: #0F6B4B;
  --green-dark: #0A4E37;
  --gold: #C8A24B;
  --cream: #F8F5EE;
  --white: #FFFFFF;
  --text: #2E2E2E;
  --text-soft: #666666;
  --border: #E6E6E6;
  --grad-green: linear-gradient(135deg, #0F6B4B, #0A4E37);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.resource-detail-hero {
  padding: 64px 0 48px;
  background:
    radial-gradient(circle at top left, rgba(15, 107, 75, 0.12), transparent 40%),
    linear-gradient(180deg, #f8f5ee 0%, #ffffff 100%);
  text-align: center;
}

.resource-detail-hero h1 {
  max-width: 820px;
  margin: 0 auto 12px;
  color: var(--green-dark);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.15;
}

.resource-meta-title {
  max-width: 720px;
  margin: 0 auto 12px;
  color: var(--green);
  font-weight: 600;
  font-size: 0.95rem;
}

.resource-lead {
  max-width: 720px;
  margin: 0 auto 22px;
  color: var(--text-soft);
  font-size: 1.02rem;
}

.resource-stat-row {
  display: flex;
  gap: 22px;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.resource-stat-row strong {
  color: var(--green-dark);
}

.resource-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.resource-viewer-section {
  padding: 0 0 64px;
}

.resource-viewer-section .container {
  max-width: 1100px;
}

.pdf-viewer {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #111;
  box-shadow: 0 18px 50px rgba(10, 78, 55, 0.12);
}

.pdf-viewer:fullscreen,
.pdf-viewer:-webkit-full-screen,
.pdf-viewer.is-expanded {
  width: 100%;
  height: 100%;
  border-radius: 0;
  display: flex;
  flex-direction: column;
  background: #0b0b0b;
}

/* Mobile / iOS fallback when Fullscreen API is unavailable */
.pdf-viewer.is-expanded {
  position: fixed;
  inset: 0;
  z-index: 10000;
  width: 100vw;
  height: 100dvh;
  height: 100vh;
  border: 0;
  box-shadow: none;
}

html.pdf-fs-open,
body.pdf-fs-open {
  overflow: hidden;
}

.pdf-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: #163d30;
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 5;
  flex-shrink: 0;
}

.pdf-toolbar-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.pdf-toolbar button,
.pdf-download-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  min-width: 36px;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.pdf-toolbar button:hover,
.pdf-download-link:hover {
  background: rgba(200, 162, 75, 0.9);
  border-color: transparent;
  color: #0a4e37;
}

.pdf-toolbar input[type="number"],
.pdf-toolbar input[type="search"] {
  min-height: 36px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.25);
  color: #fff;
  font: inherit;
  font-size: 0.85rem;
}

.pdf-toolbar input[type="number"] {
  width: 64px;
}

.pdf-toolbar input[type="search"] {
  width: min(180px, 36vw);
}

.pdf-page-indicator {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  font-size: 0.85rem;
}

.pdf-search-status {
  min-width: 52px;
  font-size: 0.78rem;
  opacity: 0.85;
}

.pdf-stage {
  position: relative;
  min-height: min(70vh, 720px);
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  touch-action: pan-x pan-y;
  padding: 12px 8px 24px;
  background:
    linear-gradient(180deg, #1a1a1a, #0f0f0f);
}

.pdf-viewer:fullscreen .pdf-stage,
.pdf-viewer:-webkit-full-screen .pdf-stage,
.pdf-viewer.is-expanded .pdf-stage {
  flex: 1;
  min-height: 0;
  height: auto;
}

.pdf-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  text-align: center;
  color: rgba(255, 255, 255, 0.75);
  font-weight: 500;
  z-index: 2;
  background: rgba(15, 15, 15, 0.72);
}

.pdf-loading.is-hidden {
  display: none;
}

#pdfCanvas {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
  background: #fff;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

.pdf-text-layer {
  display: none;
}

.resource-description-section {
  padding: 24px 0 72px;
}

.resource-description-section .narrow {
  max-width: 820px;
}

.resource-description-section h2 {
  margin-bottom: 18px;
  color: var(--green-dark);
  font-size: 2rem;
}

.resource-description p {
  margin-bottom: 14px;
  color: var(--text-soft);
  font-size: 1.02rem;
}

.related-resources-section {
  padding: 72px 0 96px;
  background: var(--cream);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.related-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--white);
}

.related-card h3 {
  margin-bottom: 10px;
  color: var(--green-dark);
  font-size: 1.25rem;
}

.related-card p {
  margin-bottom: 14px;
  color: var(--text-soft);
  font-size: 0.92rem;
}

@media (max-width: 860px) {
  .resource-viewer-section {
    padding: 0 0 48px;
  }

  .resource-viewer-section .container {
    padding-left: 12px;
    padding-right: 12px;
  }

  .pdf-viewer {
    border-radius: 12px;
  }

  .pdf-toolbar {
    justify-content: flex-start;
    gap: 8px;
    padding: 10px;
  }

  .pdf-toolbar-group {
    gap: 6px;
  }

  .pdf-toolbar button,
  .pdf-download-link {
    min-height: 40px;
    padding: 0 10px;
    font-size: 0.8rem;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .pdf-stage {
    min-height: 55vh;
    padding: 8px 4px 16px;
  }
}

@media (max-width: 560px) {
  .resource-detail-hero {
    padding: 48px 0 36px;
  }

  .pdf-toolbar-search {
    width: 100%;
  }

  .pdf-toolbar input[type="search"] {
    flex: 1;
    width: auto;
    min-width: 0;
  }

  .pdf-toolbar .pdf-toolbar-desktop-only {
    display: none;
  }

  .pdf-stage {
    min-height: 62vh;
  }
}