.base64-tool {
  display: grid;
  gap: 24px;
}

.base64-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 10px;
}

.base64-panel {
  display: grid;
  gap: 14px;
  min-width: 0;
  padding: 16px;
  background: rgb(255 255 255 / 76%);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.base64-panel textarea {
  width: 100%;
  min-height: 340px;
  padding: 14px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.95rem;
  line-height: 1.55;
  outline: none;
  resize: vertical;
}

.base64-panel textarea:focus {
  border-color: var(--focus);
  box-shadow: 0 0 0 4px rgb(22 119 255 / 14%);
}

.utility-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.check-option,
.file-button {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 12px;
  color: var(--text);
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-weight: 800;
}

.check-option {
  gap: 8px;
}

.check-option input {
  width: 18px;
  min-height: 18px;
  padding: 0;
  accent-color: var(--accent);
}

.file-button {
  cursor: pointer;
}

.file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.base64-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.base64-stats div {
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.base64-stats dt {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 850;
  text-transform: uppercase;
}

.base64-stats dd {
  margin: 4px 0 0;
  font-weight: 850;
}

.seo-content h3 {
  margin: 0;
  font-size: 1.04rem;
}

.seo-content p {
  margin: 8px 0 0;
  color: var(--muted);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.faq-grid article {
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

@media (max-width: 860px) {
  .base64-grid,
  .base64-stats,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .base64-panel textarea {
    min-height: 260px;
  }

  .utility-row .primary-button,
  .utility-row .action-button,
  .panel-heading .action-button {
    width: 100%;
  }
}