/* ============================================================
   Zoomable SVG Viewer - pyshine.com
   Allows zooming, panning, and dragging individual SVG diagrams
   in blog posts without affecting the rest of the page.
   ============================================================ */

/* Container that wraps each SVG image */
.svg-viewer {
  position: relative;
  margin: 1.5em 0;
  border: 1px solid var(--border-color, #e0e0e0);
  border-radius: 8px;
  overflow: hidden;
  background: var(--card-bg, #ffffff);
  box-shadow: 0 2px 8px var(--shadow-color, rgba(0, 0, 0, 0.08));
  transition: box-shadow 0.3s ease;
}

.svg-viewer:hover {
  box-shadow: 0 4px 16px var(--shadow-color, rgba(0, 0, 0, 0.14));
}

/* The scrollable/draggable content area */
.svg-viewer-content {
  overflow: auto;
  cursor: default;
  position: relative;
  min-height: 200px;
  max-height: 80vh;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 0, 0, 0.2) transparent;
  /* Ensure horizontal overflow is visible */
  overflow-x: auto;
  overflow-y: auto;
}

.svg-viewer-content::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

.svg-viewer-content::-webkit-scrollbar-track {
  background: transparent;
}

.svg-viewer-content::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 3px;
}

.svg-viewer-content::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.35);
}

/* The inner wrapper that gets width changes for zoom */
.svg-viewer-inner {
  transition: width 0.2s ease-out;
  display: inline-block;
  min-width: 100%;
}

.svg-viewer-inner img {
  display: block;
  max-width: none; /* Allow image to exceed container when zoomed */
  width: 100%;
  height: auto;
}

/* Drag state cursor */
.svg-viewer-content.dragging {
  cursor: grabbing !important;
}

.svg-viewer-content.draggable {
  cursor: grab;
}

/* Control bar - toolbar strip above the image content */
.svg-viewer-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color, #e0e0e0);
  z-index: 10;
  opacity: 1;
  transition: opacity 0.3s ease;
}

/* Zoom buttons */
.svg-viewer-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--text-color, #333);
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1;
  padding: 0;
  transition: background 0.2s ease, color 0.2s ease, transform 0.1s ease;
  -webkit-user-select: none;
  user-select: none;
}

.svg-viewer-btn:hover {
  background: var(--bg-secondary, #f0f0f0);
  color: var(--heading-color, #000);
}

.svg-viewer-btn:active {
  transform: scale(0.92);
  background: var(--border-color, #ddd);
}

.svg-viewer-btn:focus-visible {
  outline: 2px solid #4a90d9;
  outline-offset: 1px;
}

/* Reset button icon */
.svg-viewer-btn--reset {
  font-size: 14px;
}

/* Zoom level display */
.svg-viewer-zoom-level {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary, #666);
  min-width: 36px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  -webkit-user-select: none;
  user-select: none;
  letter-spacing: -0.3px;
}

/* Separator between buttons and zoom level */
.svg-viewer-separator {
  width: 1px;
  height: 18px;
  background: var(--border-color, #e0e0e0);
  margin: 0 2px;
}

/* Dark theme support */
[data-theme="dark"] .svg-viewer {
  border-color: var(--border-color, #333);
  background: var(--card-bg, #1a1a1a);
}

[data-theme="dark"] .svg-viewer-controls {
  background: rgba(30, 30, 30, 0.95);
  border-bottom-color: var(--border-color, #444);
}

[data-theme="dark"] .svg-viewer-btn {
  color: var(--text-color, #ccc);
}

[data-theme="dark"] .svg-viewer-btn:hover {
  background: var(--bg-secondary, #333);
  color: var(--heading-color, #fff);
}

[data-theme="dark"] .svg-viewer-zoom-level {
  color: var(--text-secondary, #999);
}

[data-theme="dark"] .svg-viewer-content::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .svg-viewer-content::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.35);
}

/* Mobile responsiveness */
@media (max-width: 768px) {
  .svg-viewer-controls {
    padding: 4px 8px;
    gap: 3px;
  }

  .svg-viewer-btn {
    width: 32px;
    height: 32px;
    font-size: 18px;
  }

  .svg-viewer-btn--reset {
    font-size: 16px;
  }

  .svg-viewer-zoom-level {
    font-size: 12px;
    min-width: 40px;
  }

  .svg-viewer-content {
    max-height: 60vh;
  }
}

/* Print styles - hide controls when printing */
@media print {
  .svg-viewer-controls {
    display: none !important;
  }

  .svg-viewer {
    border: none;
    box-shadow: none;
  }

  .svg-viewer-inner {
    width: 100% !important;
  }

  .svg-viewer-content {
    overflow: visible;
    max-height: none;
  }
}