/* Home: certificate previews + "View certificate" lightbox. */

.cert-card.has-cert-file {
  padding-top: 1.25rem;
}

/* Keep interactive parts above the card's decorative rings (::after, z-index 1). */
.cert-thumb,
.cert-view-btn {
  position: relative;
  z-index: 2;
}

.cert-thumb {
  display: block;
  width: 100%;
  height: 170px;
  margin: 0 0 1.25rem;
  padding: 0.5rem;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  cursor: zoom-in;
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.cert-thumb:hover,
.cert-thumb:focus-visible {
  border-color: var(--accent-copper);
  box-shadow: 0 6px 18px -6px rgba(15, 23, 42, 0.18);
}

.cert-thumb:focus-visible,
.cert-view-btn:focus-visible {
  outline: 2px solid var(--accent-copper);
  outline-offset: 2px;
}

.cert-thumb-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.cert-thumb-pdf {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 100%;
  color: var(--accent-copper);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.cert-view-btn {
  white-space: nowrap;
  text-decoration: underline !important;
  text-underline-offset: 3px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1rem;
  padding: 0.35rem 0.25rem;
  background: none;
  border: none;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-copper-dark);
  text-decoration: none;
  cursor: pointer;
}

.cert-view-btn:hover {
  color: var(--accent-copper);
}

/* Lightbox */
.cert-lightbox {
  /* The theme's global reset removes the dialog's default auto margins, so centre it explicitly. */
  position: fixed;
  inset: 0;
  margin: auto;
  height: fit-content;
  width: min(920px, calc(100vw - 2rem));
  max-height: calc(100vh - 2rem);
  max-height: calc(100dvh - 2rem);
  padding: 0;
  border: none;
  border-radius: var(--border-radius-lg);
  background-color: var(--bg-white);
  box-shadow: var(--shadow-premium);
  overflow: hidden;
}

.cert-lightbox::backdrop {
  background-color: rgba(11, 19, 41, 0.78);
}

.cert-lightbox[open] {
  display: flex;
  flex-direction: column;
}

.cert-lightbox-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem 1.1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.cert-lightbox-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-heading);
  margin: 0;
}

.cert-lightbox-issuer {
  margin: 0.2rem 0 0;
  font-size: 0.85rem;
  color: var(--text-light);
}

.cert-lightbox-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.cert-lightbox-open {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1rem;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-navy);
  border: 1.5px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.cert-lightbox-open:hover {
  border-color: var(--accent-copper);
  color: var(--accent-copper-dark);
}

.cert-lightbox-close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  background-color: var(--bg-light);
  color: var(--primary-navy);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.cert-lightbox-close:hover,
.cert-lightbox-close:focus-visible {
  background-color: var(--accent-copper);
  color: var(--text-white);
}

.cert-lightbox-body {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 1.25rem;
  background-color: var(--bg-light);
  text-align: center;
}

.cert-lightbox-img {
  display: block;
  max-width: 100%;
  max-height: calc(100vh - 11rem);
  max-height: calc(100dvh - 11rem);
  width: auto;
  height: auto;
  margin: 0 auto;
  background-color: var(--bg-white);
  box-shadow: var(--shadow-md);
}

html.cert-lightbox-lock {
  overflow: hidden;
}

@media (max-width: 640px) {
  .cert-thumb {
    height: 140px;
  }

  .cert-lightbox {
    width: calc(100vw - 1rem);
    border-radius: var(--border-radius-md);
  }

  .cert-lightbox-head {
    padding: 0.9rem 0.9rem 0.9rem 1.1rem;
  }

  .cert-lightbox-title {
    font-size: 1.05rem;
  }

  .cert-lightbox-open {
    display: none;
  }

  .cert-lightbox-body {
    padding: 0.75rem;
  }
}

/* Desktop: 5 per row; extra certificates wrap onto centred rows. Smaller screens keep the theme's grid. */
@media (min-width: 993px) {
  .certifications-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
  }

  .certifications-grid > .cert-card {
    flex: 0 0 calc((100% - 4 * 1.5rem) / 5);
    max-width: calc((100% - 4 * 1.5rem) / 5);
  }
}