/* =================================== 
   INLINE DOCUMENT VIEWER
   Modern Same-Page PDF Display
   =================================== */

.document-viewer-inline {
  display: none;
  width: 100%;
  min-height: calc(100vh - 80px);
  background: var(--bg-primary);
  opacity: 0;
  transform: translateY(-20px);
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
              transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  /* Remove extra top spacing to avoid double-offset with fixed site header */
  margin-top: 0;
  padding: 0;
  position: relative;
  z-index: 1000;
  /* JS precisely scrolls to viewer; avoid double offset here */
  scroll-margin-top: 0;
  /* Smooth animation performance */
  will-change: transform, opacity;
}

.document-viewer-inline.active {
  display: block !important;
  opacity: 1 !important;
  transform: translateY(0) !important;
}

/* Focus Mode: near full-screen under the site header */
.document-viewer-inline.focus-mode {
  position: fixed;
  left: 0;
  right: 0;
  top: var(--site-header-offset, 80px);
  bottom: 0;
  margin: 0;
  padding: 0;
  z-index: 1100;
}

.document-viewer-inline.focus-mode .document-viewer-content-inline {
  height: calc(100vh - var(--site-header-offset, 80px) - var(--viewer-header-height, 88px));
  max-height: none;
  padding: 1rem 1rem calc(1rem + var(--viewer-header-height, 88px));
}

.document-viewer-inline.focus-mode .viewer-frame {
  border-radius: 12px;
}

.document-viewer-header-inline {
  background: linear-gradient(135deg, rgba(0, 123, 255, 0.1) 0%, rgba(0, 212, 255, 0.05) 100%);
  border-bottom: 2px solid rgba(0, 212, 255, 0.3);
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  position: sticky; /* keep controls visible */
  z-index: 1001;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  width: 100%;
}

/* New variant: header docked near bottom of the viewer area */
.document-viewer-header-bottom {
  bottom: 0;
  top: auto;
  border-top: 2px solid rgba(0, 212, 255, 0.15);
  border-bottom: none;
}

.document-viewer-title-section {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex: 1;
  min-width: 250px;
}

.document-viewer-back {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border: none;
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

.document-viewer-back:hover {
  transform: translateX(-5px);
  box-shadow: 0 6px 20px rgba(0, 123, 255, 0.5);
}

.document-viewer-back i {
  transition: transform 0.3s ease;
}

.document-viewer-back:hover i {
  transform: translateX(-3px);
}

.document-viewer-title-inline {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.document-viewer-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.document-viewer-download-inline,
.document-viewer-newtab-inline {
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.3s ease;
  white-space: nowrap;
}

/* Small icon buttons for controls */
.viewer-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 2px solid rgba(255, 255, 255, 0.18);
  color: var(--text-primary);
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s ease;
}
.viewer-btn:hover {
  transform: translateY(-1px);
  background: rgba(0, 123, 255, 0.18);
  border-color: rgba(0, 123, 255, 0.35);
  box-shadow: 0 6px 16px rgba(0, 123, 255, 0.25);
}
.viewer-btn:focus-visible,
.document-viewer-back:focus-visible,
.document-viewer-download-inline:focus-visible,
.document-viewer-newtab-inline:focus-visible {
  outline: 3px solid var(--accent-secondary);
  outline-offset: 2px;
}

/* Loading overlay inside viewer content */
.viewer-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: none;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-secondary);
  z-index: 2;
}
.viewer-spinner {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.25);
  border-top-color: var(--accent-primary);
  animation: spin 0.9s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.document-viewer-content-inline { position: relative; }

.document-viewer-download-inline:hover {
  background: var(--success);
  border-color: var(--success);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.4);
}

.document-viewer-newtab-inline:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
}

.document-viewer-content-inline {
  width: 100%;
  min-height: 360px;
  /* Leave extra bottom space for bottom toolbar (dynamic by measured toolbar height) */
  padding: 2rem 2rem calc(2rem + var(--viewer-header-height, 5.5rem));
  background: var(--bg-primary);
  /* Enable inner scroll if content exceeds viewport to avoid layout thrash */
  overflow: auto;
}

/* Rounded certificate frame inside the screen */
.viewer-frame {
  width: 100%;
  height: 100%;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border: 1.5px solid rgba(255,255,255,0.12);
  padding: 12px; /* small margin inside the frame */
  box-shadow: 0 14px 40px rgba(0,0,0,0.35), inset 0 0 0 1px rgba(0, 212, 255, 0.12);
}

.viewer-frame .document-viewer-embed,
.viewer-frame .document-viewer-iframe {
  border-radius: 12px; /* inner rounding for the certificate */
  border: 2px solid rgba(0, 212, 255, 0.18);
}
.document-viewer-embed {
  width: 100% !important;
  height: 100% !important;
  border-radius: 12px;
  background: white;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  border: 2px solid rgba(0, 212, 255, 0.2);
  display: block !important;
  min-height: 600px;
}

.document-viewer-iframe {
  width: 100% !important;
  height: 100% !important;
  border-radius: 12px;
  background: white;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  border: 2px solid rgba(0, 212, 255, 0.2);
  min-height: 600px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .document-viewer-header-inline {
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    top: var(--site-header-offset, 64px);
  }
  
  .document-viewer-title-section {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .document-viewer-title-inline {
    font-size: 1.25rem;
  }
  
  .document-viewer-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .document-viewer-download-inline,
  .document-viewer-newtab-inline {
    width: 100%;
    justify-content: center;
  }
  
  .document-viewer-content-inline {
    padding: 1rem;
    min-height: 320px;
  }
}

@media (max-width: 480px) {
  .document-viewer-back {
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
  }
  
  .document-viewer-title-inline {
    font-size: 1.1rem;
  }
  
  .document-viewer-download-inline,
  .document-viewer-newtab-inline {
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
  }
}