.certificate-document-section {
  position: relative;
  overflow: hidden;
  padding: 24px 0 104px;
  background:
    radial-gradient(ellipse at 12% 20%, rgba(204, 0, 0, 0.055), transparent 34%),
    linear-gradient(180deg, #fff 0%, var(--surface) 100%);
}

.certificate-document-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 28px;
}

.certificate-document-heading h2 {
  margin: 6px 0 8px;
}

.certificate-document-heading p {
  margin: 0;
  color: var(--muted);
}

.certificate-document-actions {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  gap: 10px;
}

.certificate-button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 0.94rem;
  font-weight: 650;
  text-decoration: none;
  transition: transform var(--transition), background-color var(--transition), box-shadow var(--transition);
}

.certificate-button svg {
  width: 17px;
  height: 17px;
}

.certificate-button:hover {
  transform: translateY(-2px);
}

.certificate-button:focus-visible {
  outline: 3px solid rgba(204, 0, 0, 0.3);
  outline-offset: 3px;
}

.certificate-button-primary {
  color: var(--white);
  background: var(--red);
  box-shadow: 0 6px 16px rgba(204, 0, 0, 0.18);
}

.certificate-button-primary:hover {
  color: var(--white);
  background: var(--red-dark);
  box-shadow: 0 9px 20px rgba(204, 0, 0, 0.24);
}

.certificate-button-secondary {
  color: var(--text);
  border-color: var(--border);
  background: var(--white);
}

.certificate-button-secondary:hover {
  color: var(--red-dark);
  border-color: rgba(204, 0, 0, 0.35);
  background: #fffafa;
}

.certificate-viewer {
  overflow: hidden;
  border: 1px solid rgba(13, 27, 42, 0.12);
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: 0 18px 56px rgba(13, 27, 42, 0.12);
}

.certificate-viewer-bar {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(110deg, #fff 0%, #f8f9fc 100%);
}

.certificate-file {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 13px;
}

.certificate-file-icon {
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 12px;
  color: var(--red);
  background: rgba(204, 0, 0, 0.08);
}

.certificate-file-icon svg {
  width: 21px;
  height: 21px;
}

.certificate-file strong,
.certificate-file span:not(.certificate-file-icon) {
  display: block;
}

.certificate-file strong {
  overflow: hidden;
  color: var(--text);
  font-size: 0.98rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.certificate-file div > span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.84rem;
}

.certificate-verified {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 7px;
  color: #166534;
  font-size: 0.86rem;
  font-weight: 600;
}

.certificate-verified svg {
  width: 18px;
  height: 18px;
}

.certificate-viewer-canvas {
  padding: 16px;
  background:
    radial-gradient(ellipse at center, rgba(13, 27, 42, 0.035), transparent 70%),
    #eef1f5;
}

.certificate-viewer-canvas iframe {
  display: block;
  width: 100%;
  height: clamp(540px, 78vh, 940px);
  border: 1px solid rgba(13, 27, 42, 0.1);
  border-radius: 10px;
  background: var(--white);
  box-shadow: 0 4px 18px rgba(13, 27, 42, 0.08);
}

.certificate-viewer-image {
  display: none;
}

.certificate-viewer-image img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(13, 27, 42, 0.1);
  border-radius: 10px;
  background: var(--white);
  box-shadow: 0 4px 18px rgba(13, 27, 42, 0.08);
}

@media (max-width: 768px) {
  .certificate-document-section {
    padding: 8px 0 72px;
  }

  .certificate-document-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 22px;
  }

  .certificate-viewer-bar {
    min-height: 68px;
    padding: 12px 16px;
  }

  .certificate-viewer-canvas {
    padding: 10px;
  }

  .certificate-viewer-canvas iframe {
    display: none;
  }

  .certificate-viewer-image {
    display: block;
  }
}

@media (max-width: 480px) {
  .certificate-document-actions {
    display: grid;
    width: 100%;
    grid-template-columns: 1fr 1fr;
  }

  .certificate-button {
    gap: 7px;
    padding: 0 10px;
    font-size: 0.84rem;
  }

  .certificate-viewer {
    border-radius: 14px;
  }

  .certificate-verified {
    font-size: 0;
  }

  .certificate-verified svg {
    width: 20px;
    height: 20px;
  }

  .certificate-viewer-canvas {
    padding: 6px;
  }

  .certificate-viewer-image img {
    border-radius: 8px;
  }
}