/* ============================================================
   CERTIFICATIONS EXPLORER — Page Styles
   Extends the global design system in style.css
============================================================ */

.certifications-page {
  --cert-hero-h: 320px;
  background-color: var(--clr-neutral-50, #ffffff);
}

/* ---- 1. Blueprint Grid Background ---- */
.certifications-section {
  position: relative;
  padding: 80px 0;
  overflow: hidden;
}

.certifications-section::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  /* Very subtle blueprint grid at 2% opacity */
  background-image:
    linear-gradient(rgba(162, 35, 142, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(162, 35, 142, 0.02) 1px, transparent 1px),
    linear-gradient(rgba(162, 35, 142, 0.015) 2px, transparent 2px),
    linear-gradient(90deg, rgba(162, 35, 142, 0.015) 2px, transparent 2px);
  background-size: 24px 24px, 24px 24px, 120px 120px, 120px 120px;
  z-index: 0;
}

.certifications-section > .container-max {
  position: relative;
  z-index: 1;
  max-width: 1320px;
}

/* ---- 2. Common Hero (reusing about-hero layout) ---- */
.about-hero.certifications-hero {
  height: var(--cert-hero-h);
  min-height: var(--cert-hero-h);
  max-height: var(--cert-hero-h);
  background-color: var(--clr-primary);
  border-bottom: 1px solid rgba(137, 27, 120, 0.35);
}

/* ---- 3. Explorer Grid ---- */
.certifications-explorer {
  display: grid;
  grid-template-columns: 32% 68%;
  gap: 30px;
  height: 720px;
  align-items: stretch;
}

/* ---- 4. Left Navigation Panel ---- */
.certifications-nav-panel {
  background: #ffffff;
  border-radius: 20px;
  padding: 30px;
  box-shadow: 
    0 15px 35px rgba(36, 55, 70, 0.04), 
    0 5px 15px rgba(36, 55, 70, 0.02);
  border: 1px solid var(--clr-neutral-200);
  display: flex;
  flex-direction: column;
  height: 100%;
  position: sticky;
  top: 120px; /* offset for sticky main header */
  z-index: 10;
}

.certifications-nav-panel__header {
  margin-bottom: 20px;
}

.certifications-nav-panel__title {
  font-family: var(--font-display, var(--font-heading));
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--clr-neutral-800);
  margin: 0 0 8px;
}

.certifications-nav-panel__desc {
  font-size: 0.875rem;
  color: var(--clr-neutral-600);
  line-height: 1.5;
  margin: 0;
}

.certifications-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
  flex-grow: 1;
  width: 100%;
  padding-right: 4px;
}

/* Custom scrollbar for left panel list */
.certifications-list::-webkit-scrollbar {
  width: 5px;
}
.certifications-list::-webkit-scrollbar-track {
  background: transparent;
}
.certifications-list::-webkit-scrollbar-thumb {
  background: var(--clr-neutral-300);
  border-radius: 10px;
}
.certifications-list::-webkit-scrollbar-thumb:hover {
  background: var(--clr-neutral-400);
}

/* ---- 5. Vertical Navigation Card ---- */
.certification-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  background: #ffffff;
  border: 1.5px solid var(--clr-neutral-300);
  border-radius: 16px;
  cursor: pointer;
  width: 100%;
  min-height: 72px;
  text-align: left;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
  z-index: 2;
  flex-shrink: 0;
}

.certification-card__content {
  display: flex;
  align-items: center;
  gap: 16px;
  pointer-events: none;
}

.certification-card__icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--clr-primary-light);
  color: var(--clr-primary);
  border-radius: 10px;
  font-size: 1.2rem;
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.certification-card__text {
  display: flex;
  flex-direction: column;
}

.certification-card__title {
  font-family: var(--font-display, var(--font-heading));
  font-size: 0.925rem;
  font-weight: 700;
  color: var(--clr-neutral-800);
  margin: 0;
  line-height: 1.35;
  transition: color 0.3s ease;
}

.certification-card__description {
  font-size: 0.775rem;
  color: var(--clr-neutral-500);
  margin-top: 3px;
  line-height: 1.3;
  transition: color 0.3s ease;
}

.certification-card__arrow {
  color: var(--clr-neutral-400);
  font-size: 1.1rem;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  margin-left: 10px;
  flex-shrink: 0;
}

/* Card Hover State */
.certification-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(162, 35, 142, 0.12);
  border-color: var(--clr-primary);
}

.certification-card:hover .certification-card__arrow {
  transform: translateX(4px);
  color: var(--clr-primary);
}

/* Card Active/Selected State */
.certification-card.is-active {
  background-color: var(--clr-primary);
  border-color: var(--clr-primary);
  border-left: 5px solid var(--clr-secondary);
  box-shadow: 0 12px 24px rgba(162, 35, 142, 0.2);
}

.certification-card.is-active .certification-card__title {
  color: #ffffff;
}

.certification-card.is-active .certification-card__description {
  color: rgba(255, 255, 255, 0.75);
}

.certification-card.is-active .certification-card__icon-wrapper {
  background-color: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.certification-card.is-active .certification-card__arrow {
  color: #ffffff;
}

/* ---- 6. Right PDF Viewer Panel ---- */
.certifications-viewer-panel {
  background: #ffffff;
  border-radius: 20px;
  box-shadow: 
    0 15px 35px rgba(36, 55, 70, 0.04), 
    0 5px 15px rgba(36, 55, 70, 0.02);
  border: 1px solid var(--clr-neutral-200);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
}

/* Top Toolbar */
.viewer-toolbar {
  padding: 16px 24px;
  border-bottom: 1px solid var(--clr-neutral-200);
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  z-index: 20;
}

.viewer-info {
  display: flex;
  flex-direction: column;
  max-width: 50%;
}

.viewer-title {
  font-family: var(--font-display, var(--font-heading));
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-neutral-800);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.viewer-description {
  font-size: 0.8rem;
  color: var(--clr-neutral-500);
  margin-top: 2px;
}

.viewer-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Button scaling interactions */
.viewer-control-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-neutral-100);
  border: 1px solid var(--clr-neutral-200);
  border-radius: 8px;
  color: var(--clr-neutral-700);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
  font-size: 1.1rem;
}

.viewer-control-btn:hover {
  background: var(--clr-primary-light);
  color: var(--clr-primary);
  border-color: var(--clr-primary-light);
  transform: scale(1.08);
}

.viewer-control-btn:active {
  transform: scale(0.92);
}

.viewer-page-indicator {
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--clr-neutral-700);
  padding: 0 8px;
  min-width: 80px;
  text-align: center;
  user-select: none;
}

.viewer-divider {
  width: 1px;
  height: 24px;
  background-color: var(--clr-neutral-300);
  margin: 0 4px;
}

/* Canvas Area */
.viewer-content-area {
  flex-grow: 1;
  background: var(--clr-neutral-200);
  position: relative;
  overflow: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 24px;
  min-height: 0;
}

/* Custom Scrollbars for PDF View Area */
.viewer-content-area::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.viewer-content-area::-webkit-scrollbar-track {
  background: var(--clr-neutral-200);
}
.viewer-content-area::-webkit-scrollbar-thumb {
  background: var(--clr-neutral-400);
  border-radius: 4px;
}
.viewer-content-area::-webkit-scrollbar-thumb:hover {
  background: var(--clr-neutral-500);
}

.viewer-canvas-wrapper {
  position: relative;
  background: #ffffff;
  box-shadow: 
    0 15px 35px rgba(0, 0, 0, 0.1),
    0 5px 15px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
  transform-origin: top center;
  transition: transform 0.2s ease-out;
}

.viewer-canvas-wrapper canvas {
  display: block;
  max-width: 100%;
  height: auto !important;
  border-radius: 4px;
}

/* ---- 7. Loading Spinner & Error Overlay ---- */
.viewer-spinner {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 15px;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.viewer-spinner.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.viewer-spinner__spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--clr-neutral-200);
  border-top-color: var(--clr-primary);
  border-radius: 50%;
  animation: viewerSpin 1s infinite linear;
}

.viewer-spinner__text {
  font-family: var(--font-display, var(--font-heading));
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--clr-neutral-800);
}

@keyframes viewerSpin {
  to { transform: rotate(360deg); }
}

.viewer-error {
  position: absolute;
  inset: 0;
  background: var(--clr-neutral-100);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 30px;
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.viewer-error.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.viewer-error__icon {
  font-size: 3rem;
  color: var(--clr-neutral-400);
  margin-bottom: 15px;
}

.viewer-error__title {
  font-family: var(--font-display, var(--font-heading));
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--clr-neutral-800);
  margin-bottom: 8px;
}

.viewer-error__desc {
  font-size: 0.875rem;
  color: var(--clr-neutral-600);
  max-width: 320px;
  line-height: 1.5;
  margin-bottom: 16px;
}

/* ---- 8. Fullscreen State ---- */
.certifications-viewer-panel.is-fullscreen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw !important;
  height: 100vh !important;
  z-index: 99999;
  border-radius: 0;
  border: none;
}

.certifications-viewer-panel.is-fullscreen .viewer-toolbar {
  border-radius: 0;
}

/* ---- 9. Accessibility Focus States ---- */
.certification-card:focus-visible,
.viewer-control-btn:focus-visible {
  outline: 3px solid var(--clr-secondary);
  outline-offset: 2px;
}

/* ---- 10. Responsive Design ---- */

/* Tablet Layout (max-width: 991.98px) */
@media (max-width: 991.98px) {
  .certifications-explorer {
    grid-template-columns: 1fr;
    height: auto;
    gap: 24px;
  }
  
  .certifications-nav-panel {
    position: static;
    height: auto;
    padding: 24px;
  }
  
  .certifications-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 10px;
    overflow-y: visible;
  }
  
  .certification-card {
    flex: 1 1 calc(50% - 5px);
  }
  
  .certifications-viewer-panel {
    height: 650px;
  }
}

/* Mobile Layout (max-width: 767.98px) */
@media (max-width: 767.98px) {
  .certifications-section {
    padding: 40px 0;
  }

  .certifications-nav-panel {
    padding: 16px;
    border-radius: 12px;
  }
  
  /* Mobile Accordion style cards */
  .certifications-list {
    flex-direction: column;
    gap: 8px;
  }
  
  .certification-card {
    flex: 1 1 100%;
    padding: 12px 16px;
    border-radius: 10px;
  }
  
  .certification-card__icon-wrapper {
    width: 34px;
    height: 34px;
    font-size: 1.05rem;
    border-radius: 8px;
  }

  .certification-card__title {
    font-size: 0.85rem;
  }

  .certification-card__description {
    font-size: 0.725rem;
    margin-top: 1px;
  }

  /* Viewer Card */
  .certifications-viewer-panel {
    height: 520px;
    border-radius: 12px;
  }

  /* Scrollable Toolbar on Mobile */
  .viewer-toolbar {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px;
    gap: 12px;
  }
  
  .viewer-info {
    max-width: 100%;
    text-align: center;
  }

  .viewer-title {
    font-size: 0.95rem;
    white-space: normal;
  }

  .viewer-description {
    font-size: 0.75rem;
  }

  .viewer-controls {
    justify-content: center;
    overflow-x: auto;
    white-space: nowrap;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }
  
  .viewer-control-btn {
    width: 32px;
    height: 32px;
    font-size: 0.95rem;
  }
  
  .viewer-page-indicator {
    font-size: 0.75rem;
    min-width: 70px;
  }

  .viewer-content-area {
    padding: 12px;
  }
}

/* ---- 11. Reduced Motion Support ---- */
@media (prefers-reduced-motion: reduce) {
  .certification-card,
  .certification-card__arrow,
  .certification-card__icon-wrapper,
  .viewer-control-btn,
  .viewer-spinner__spinner,
  .viewer-canvas-wrapper {
    transition: none !important;
    transform: none !important;
    animation: none !important;
  }
  
  .viewer-spinner__spinner {
    border-top-color: var(--clr-primary-hover);
  }
}