/* Light-mode main background: green tint (override theme white) */
:root:not([data-r-output-format="print"])[data-r-theme-variant="relearn-light"] {
  --MAIN-BG-color: rgba(125, 201, 3, 0.1);
}
html:not([data-r-output-format="print"])[data-r-theme-variant="relearn-light"] body {
  background-color: rgba(125, 201, 3, 0.1) !important;
}

/* Font family: Tahoma */
:root {
  --MAIN-font: Tahoma, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --MAIN-TITLES-font: Tahoma, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* Topbar: subtle separation from content */
#R-topbar {
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}
:root[data-r-theme-variant="relearn-dark"] #R-topbar {
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08);
}

/* Prevent horizontal scrollbar */
html { overflow-x: hidden; }
/* Hide main content until scroll-top-on-load has run (avoids visible jump from title to top) */
html.scroll-loading #R-body-inner { visibility: hidden; }

/* Topbar: theme toggle button */
#theme-toggle-btn { cursor: pointer; padding: 0.5em 0.75em; }

/* Sidebar (menu) button: only on mobile */
#sidebar-toggle-btn { display: none; }
@media (max-width: 47.999rem) {
  #sidebar-toggle-btn { display: inline-flex !important; }
}

#theme-toggle-btn .theme-icon-light,
#theme-toggle-btn .theme-icon-dark { pointer-events: none; }

/* Layout: content width and vertical rhythm (scale: 0.5rem, 1rem, 1.25rem, 1.5rem, 2rem) */
@media (min-width: 48rem) {
  #R-body-inner .flex-block-wrapper > article {
    max-width: 52rem;
    margin-left: auto;
    margin-right: auto;
  }
}
.tool-page .headline h1,
.headline h1 { margin-bottom: 0.5rem; }
.tool-page .lead {
  margin: 0 0 1.25rem;
  opacity: 0.9;
  font-size: 0.95rem;
}
.tool-content { margin-bottom: 1.5rem; }
.tool-content p { margin: 0 0 0.5em; }
.tool-form-wrapper {
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  padding: 1.25rem;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.02);
  border: 1px solid rgba(0, 0, 0, 0.06);
}
:root[data-r-theme-variant="relearn-dark"] .tool-form-wrapper {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
}

/* Tool pages: form, result, copy, examples, FAQ (Relearn theme) */
.tool-page .tool-header { margin-bottom: 1rem; }
.tool-page .tool-header h1,
.tool-page .headline h1,
.headline h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  font-weight: bold;
  letter-spacing: 0.02em;
}
.tool-form { margin-bottom: 1rem; }
.tool-form { margin-bottom: 1rem; }
.tool-form label { display: block; margin-bottom: 0.25em; font-weight: bold; }
.tool-form input, .tool-form select, .tool-form textarea {
  width: 100%; max-width: 20rem; padding: 0.5em 0.6em; min-height: 44px;
  border: 1px solid rgba(0, 0, 0, 0.2); border-radius: 6px;
  font: inherit; background: var(--VARIABLE-BOX-background-color, #fff);
  color: rgba(0, 0, 0, 0.8);
}
:root[data-r-theme-variant="relearn-dark"] .tool-form input,
:root[data-r-theme-variant="relearn-dark"] .tool-form select,
:root[data-r-theme-variant="relearn-dark"] .tool-form textarea {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.95) !important;
}
:root[data-r-theme-variant="relearn-dark"] .tool-form input[type="number"] {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.95) !important;
}
.tool-form input[type="number"] { max-width: 5rem; }
.tool-form .form-row { margin-bottom: 1rem; }
.tool-form textarea { min-height: 6rem; }
.tool-form input[type="color"] { max-width: 4rem; height: 44px; padding: 2px; cursor: pointer; }
.tool-form input[type="checkbox"] { width: 1rem; height: 1rem; max-width: none; min-height: 1rem; }
.input-with-picker { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.input-with-picker input[type="text"] { flex: 1; min-width: 8rem; }
.tool-form .rgb-inputs { display: flex; align-items: center; gap: 0.25rem; }
.tool-form .rgb-inputs input[type="number"] { max-width: 4rem; }
.tool-form .hsl-inputs { display: flex; align-items: center; gap: 0.25rem; }
.tool-form .hsl-inputs input[type="number"] { max-width: 4rem; }

/* Conversion layout: one row = From table | To table | controls (no wrap) */
.conversion-layout { display: flex; gap: 0.75rem; flex-wrap: nowrap; align-items: flex-start; overflow-x: auto; }
.conversion-from-col,
.conversion-to-col { display: flex; flex-direction: column; gap: 0.05rem; flex-shrink: 0; max-width: 12rem; }
.conversion-from-col .conversion-table-label,
.conversion-to-col .conversion-table-label { font-weight: bold; margin: 0; }
.conversion-controls-col { display: flex; flex-direction: column; gap: 0; min-width: 0; flex: 1; min-width: 10rem; padding-top: calc(1.25em + 0.05rem); }
.conversion-controls-col .form-row { margin-bottom: 0.75rem; }
.conversion-controls-col .form-row:first-child { margin-top: 0; }
.conversion-controls-col .btn { min-height: 44px; padding: 0.5em 1em; width: auto; max-width: 20rem; align-self: flex-start; }
.conversion-controls-col .tool-result { margin-top: 1.25rem; margin-bottom: 0.5rem; }
.conversion-controls-col .copy-row { margin-top: 0.5rem; }
.tool-form-wrapper.file-converter-hub .conversion-controls-col { min-height: 0; }
.file-converter-drop-row { width: 100%; margin-bottom: 1rem; }

/* Unit conversion: two one-column tables (From / To) */
.tool-form .unit-tables-wrapper { display: flex; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.tool-form .conversion-from-col .unit-tables-wrapper,
.tool-form .conversion-to-col .unit-tables-wrapper { margin-bottom: 0; }
.tool-form .unit-tables-row { margin-bottom: 0; }
.tool-form .unit-table,
.conversion-from-col .unit-table,
.conversion-to-col .unit-table { border-collapse: collapse; width: 100%; max-width: 12rem; }
.tool-form .unit-table td,
.conversion-from-col .unit-table td,
.conversion-to-col .unit-table td { padding: 0.35em 0.6em; border: 1px solid rgba(0, 0, 0, 0.2); }
:root[data-r-theme-variant="relearn-dark"] .tool-form .unit-table td,
:root[data-r-theme-variant="relearn-dark"] .conversion-from-col .unit-table td,
:root[data-r-theme-variant="relearn-dark"] .conversion-to-col .unit-table td { border-color: rgba(255, 255, 255, 0.2); }
.tool-form .unit-table .unit-row,
.conversion-from-col .unit-table .unit-row,
.conversion-to-col .unit-table .unit-row { cursor: pointer; }
.tool-form .unit-table .unit-row:hover,
.conversion-from-col .unit-table .unit-row:hover,
.conversion-to-col .unit-table .unit-row:hover { background: rgba(0, 0, 0, 0.06); }
:root[data-r-theme-variant="relearn-dark"] .tool-form .unit-table .unit-row:hover,
:root[data-r-theme-variant="relearn-dark"] .conversion-from-col .unit-table .unit-row:hover,
:root[data-r-theme-variant="relearn-dark"] .conversion-to-col .unit-table .unit-row:hover { background: rgba(255, 255, 255, 0.08); }
.tool-form .unit-table .unit-row.selected td,
.conversion-from-col .unit-table .unit-row.selected td,
.conversion-to-col .unit-table .unit-row.selected td { background: rgba(125, 201, 3, 0.25); font-weight: 600; }
:root[data-r-theme-variant="relearn-dark"] .tool-form .unit-table .unit-row.selected td,
:root[data-r-theme-variant="relearn-dark"] .conversion-from-col .unit-table .unit-row.selected td,
:root[data-r-theme-variant="relearn-dark"] .conversion-to-col .unit-table .unit-row.selected td { background: rgba(125, 201, 3, 0.2); }

/* Color picker: box + panel always ON THE PAGE (in the layout, no popup) */
#color-picker-container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  flex-shrink: 0;
}
.color-picker-swatch {
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 4px;
  flex-shrink: 0;
  background: #f00;
  pointer-events: none;
}
:root[data-r-theme-variant="relearn-dark"] .color-picker-swatch {
  border-color: rgba(255, 255, 255, 0.3);
}
.color-picker-panel {
  padding: 0.5rem;
  background: var(--VARIABLE-BOX-background-color, #fff);
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 4px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}
:root[data-r-theme-variant="relearn-dark"] .color-picker-panel {
  background: rgba(30, 30, 30, 0.98);
  border-color: rgba(255, 255, 255, 0.2);
}
.color-picker-gradient {
  display: block;
  width: 200px;
  height: 200px;
  cursor: crosshair;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}
.color-picker-hue-strip {
  display: block;
  width: 200px;
  height: 14px;
  cursor: pointer;
  border-radius: 4px;
}

/* Color page: Hex row, then sliders | palette, then Convert button full width */
.color-layout { display: flex; flex-direction: column; gap: 1rem; }
.color-hex-row { margin-bottom: 0; }
.color-sliders-picker-block { display: flex; flex-direction: column; align-items: flex-start; gap: 0.75rem; }
.color-sliders-picker-row { display: flex; gap: 0.5rem; align-items: flex-start; flex-wrap: wrap; }
.color-sliders-col { display: flex; flex-direction: column; gap: 1rem; min-width: 14rem; flex-shrink: 0; }
.color-actions-picker-col { flex-shrink: 0; }
.color-actions-picker-col #color-picker-container { width: 100%; }
.color-convert-row { width: 100%; }
.color-convert-row .btn { width: 100%; }
.color-slider-row { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.color-slider-row label { min-width: 2rem; font-weight: bold; }
.color-slider-row input[type="range"] { flex: 1; min-width: 6rem; max-width: 12rem; }
.color-slider-row input[type="number"] { max-width: 4rem; }
.color-result-boxes { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 1rem; }
.color-result-box { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.color-result-box .color-result-label { font-weight: bold; min-width: 3rem; }
.color-result-box .color-result-value { flex: 1; min-width: 8rem; max-width: 20rem; padding: 0.5em 0.6em; min-height: 44px; font-family: ui-monospace, monospace; background: var(--VARIABLE-BOX-background-color, #f5f5f5); border: 1px solid rgba(0,0,0,0.2); border-radius: 4px; box-sizing: border-box; }
:root[data-r-theme-variant="relearn-dark"] .color-result-box .color-result-value { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.2); color: rgba(255,255,255,0.95); }
.color-result-box .copy-btn { flex-shrink: 0; }
.tool-result.color-result-wrapper { display: block; margin-top: 1rem; }
.tool-result.color-result-wrapper .color-result-boxes { margin-top: 0; }

/* Result row: value box (same width as inputs) + unit to the right */
.tool-result {
  margin: 1rem 0; display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap;
  font-family: ui-monospace, monospace;
}
.tool-result-value {
  width: 100%; max-width: 20rem; padding: 0.5em 0.6em; min-height: 44px;
  background: var(--VARIABLE-BOX-background-color, #f5f5f5); border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 6px; color: rgba(0, 0, 0, 0.9); box-sizing: border-box;
}
:root[data-r-theme-variant="relearn-dark"] .tool-result-value {
  border-color: rgba(255, 255, 255, 0.2); background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.95);
}
.tool-result-unit { color: inherit; margin-left: 0.5rem; }
:root[data-r-theme-variant="relearn-dark"] .tool-result,
:root[data-r-theme-variant="relearn-dark"] .tool-result .tool-result-value {
  color: rgba(255, 255, 255, 0.95);
}
.tool-result-unit:empty { display: none; }
/* Wider result value for UUID (fits 36 chars on one row on desktop) */
@media (min-width: 768px) {
  .tool-result--wide .tool-result-value { max-width: 32rem; }
}
/* Multi-row result (e.g. feet-inches calculator, discount, gcd-lcm) */
.tool-result-row {
  flex-basis: 100%;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}
.tool-result-row:last-child { margin-bottom: 0; }
.tool-result-row .tool-result-value { flex: 0 1 auto; }
.tool-result-row-nowrap { flex-wrap: nowrap; }
/* Second line for feet & inches (e.g. 6 ft 2 in) when converting to feet */
.tool-result-feet-inches {
  flex-basis: 100%;
  margin-top: 0.35rem;
  font-size: 0.95em;
  opacity: 0.9;
}
/* Compact feet format (e.g. 6′2″) below feet & inches */
.tool-result-feet-prime {
  flex-basis: 100%;
  margin-top: 0.2rem;
  font-size: 0.95em;
  opacity: 0.9;
}

.copy-row { margin-top: 0.5rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tool-form .btn + .btn { margin-left: 1rem; }
.copy-row .btn { min-height: 48px; padding: 0.6em 1.2em; border: 1px solid rgba(0, 0, 0, 0.2); }
:root[data-r-theme-variant="relearn-dark"] .copy-row .btn { border-color: rgba(255, 255, 255, 0.2); }
.btn {
  min-height: 48px; padding: 0.6em 1.2em; border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 6px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1); }
:root[data-r-theme-variant="relearn-dark"] .btn { border-color: rgba(255, 255, 255, 0.2); }
:root[data-r-theme-variant="relearn-dark"] .btn:hover { box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25); }
.btn-primary { background: var(--VARIABLE-COLOR-primary, #2563eb); color: #fff; border-color: var(--VARIABLE-COLOR-primary, #2563eb); }
:root[data-r-theme-variant="relearn-dark"] .btn-primary { background: var(--VARIABLE-COLOR-primary, #3b82f6); border-color: var(--VARIABLE-COLOR-primary, #3b82f6); color: #fff; }
.btn-secondary { background: rgba(0, 0, 0, 0.06); }
:root[data-r-theme-variant="relearn-dark"] .btn-secondary { background: rgba(255, 255, 255, 0.12); }
.disclaimer-box { margin: 1rem 0; padding: 1rem; border: 2px solid var(--VARIABLE-BOX-color, #2c5282); border-radius: 4px; font-size: 0.9rem; }
.examples, .faq {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--VARIABLE-BOX-border-color, #e8e8e8);
  border-radius: 0 0 8px 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.examples h2, .faq h2 { margin-top: 0; margin-bottom: 0.75rem; }
:root[data-r-theme-variant="relearn-dark"] .examples,
:root[data-r-theme-variant="relearn-dark"] .faq { box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15); }
.examples ul, .faq details { margin: 0.5em 0; }
.faq summary {
  cursor: pointer;
  font-weight: bold;
  padding: 0.25em 0;
  padding-left: 1.25em;
  position: relative;
}
.faq summary::before {
  content: "\25B6";
  position: absolute;
  left: 0;
  font-size: 0.75em;
  transition: transform 0.2s;
}
.faq details[open] summary::before { transform: rotate(90deg); }
.tool-form-placeholder { opacity: 0.8; font-style: italic; }

/* Image tools: file input + drop zone */
.image-file-input { position: absolute; width: 0.1px; height: 0.1px; opacity: 0; overflow: hidden; clip: rect(0, 0, 0, 0); }
.image-drop-zone {
  display: flex; align-items: center; justify-content: center; gap: 1rem; flex-wrap: wrap;
  min-height: 120px; padding: 1.5rem; margin-bottom: 1rem;
  border: 2px dashed rgba(0, 0, 0, 0.25); border-radius: 8px;
  background: var(--VARIABLE-BOX-background-color, #f9f9f9);
  cursor: pointer; text-align: center; font-size: 0.95rem; color: rgba(0, 0, 0, 0.7);
  transition: border-color 0.2s, background 0.2s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.image-drop-zone .image-drop-zone-text { flex: 1; min-width: 10rem; }
.image-upload-thumbnail {
  max-width: 120px; max-height: 120px; width: auto; height: auto;
  object-fit: contain; border-radius: 6px; border: 1px solid rgba(0, 0, 0, 0.15);
}
:root[data-r-theme-variant="relearn-dark"] .image-upload-thumbnail { border-color: rgba(255, 255, 255, 0.2); }
.image-drop-zone--has-preview { text-align: left; }
.image-drop-zone--has-preview .image-drop-zone-text { text-align: center; }
.image-drop-zone:hover,
.image-drop-zone:focus { outline: none; border-color: rgba(0, 0, 0, 0.4); background: rgba(0, 0, 0, 0.03); }
.image-drop-zone--over { border-color: var(--VARIABLE-COLOR-primary, #2563eb); background: rgba(37, 99, 235, 0.06); }
.image-drop-zone--error { border-color: #b91c1c; background: rgba(185, 28, 28, 0.08); color: #b91c1c; }
:root[data-r-theme-variant="relearn-dark"] .image-drop-zone {
  border-color: rgba(255, 255, 255, 0.25); background: rgba(255, 255, 255, 0.05); color: rgba(255, 255, 255, 0.85);
}
:root[data-r-theme-variant="relearn-dark"] .image-drop-zone:hover,
:root[data-r-theme-variant="relearn-dark"] .image-drop-zone:focus {
  border-color: rgba(255, 255, 255, 0.4); background: rgba(255, 255, 255, 0.08);
}
:root[data-r-theme-variant="relearn-dark"] .image-drop-zone--over {
  border-color: var(--VARIABLE-COLOR-primary, #3b82f6); background: rgba(59, 130, 246, 0.12);
}
:root[data-r-theme-variant="relearn-dark"] .image-drop-zone--error {
  border-color: #f87171; background: rgba(248, 113, 113, 0.12); color: #fca5a5;
}
.tool-result img.image-preview { max-width: 100%; max-height: 320px; display: block; border-radius: 4px; }
.tool-result canvas.image-output { max-width: 100%; display: block; border-radius: 4px; }

/* File upload card: format badge + filename (after selecting a file) */
.file-upload-card {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  margin-top: 0.5rem;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 6px;
  background: var(--VARIABLE-BOX-background-color, #f5f5f5);
  font-size: 0.95rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}
.file-upload-card__badge {
  flex-shrink: 0;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  background: rgba(0, 0, 0, 0.08);
  color: rgba(0, 0, 0, 0.85);
}
.file-upload-card__title {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: rgba(0, 0, 0, 0.85);
}
:root[data-r-theme-variant="relearn-dark"] .file-upload-card {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.06);
}
:root[data-r-theme-variant="relearn-dark"] .file-upload-card__badge {
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.95);
}
:root[data-r-theme-variant="relearn-dark"] .file-upload-card__title {
  color: rgba(255, 255, 255, 0.9);
}

/* File preview inside drop zone: icon + filename */
.file-upload-in-zone {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  min-width: 0;
}
.file-upload-icon {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  color: rgba(0, 0, 0, 0.65);
}
.file-upload-icon svg {
  display: block;
  width: 48px;
  height: 48px;
}
.file-upload-in-zone__name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.95rem;
  color: rgba(0, 0, 0, 0.85);
}
.file-upload-in-zone__remove {
  flex-shrink: 0;
  margin-left: auto;
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.08);
  color: rgba(0, 0, 0, 0.7);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.file-upload-in-zone__remove:hover {
  background: rgba(0, 0, 0, 0.14);
  color: rgba(0, 0, 0, 0.9);
}
:root[data-r-theme-variant="relearn-dark"] .file-upload-in-zone__remove {
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.85);
}
:root[data-r-theme-variant="relearn-dark"] .file-upload-in-zone__remove:hover {
  background: rgba(255, 255, 255, 0.25);
  color: #fff;
}
:root[data-r-theme-variant="relearn-dark"] .file-upload-icon {
  color: rgba(255, 255, 255, 0.8);
}
:root[data-r-theme-variant="relearn-dark"] .file-upload-in-zone__name {
  color: rgba(255, 255, 255, 0.9);
}

/* Section and tool lists: card-style links */
.section-children {
  margin-top: 1.5rem;
  max-width: 36rem;
}
.section-children h2 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}
.section-children h2:first-child { margin-top: 0; }
.section-children .section-children-list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.section-children .section-children-list li {
  margin: 0;
  padding: 0;
}
.section-children .section-children-list li a {
  display: block;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: var(--VARIABLE-BOX-background-color, #fff);
  color: inherit;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}
.section-children .section-children-list li a:hover {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.15);
}
.section-children .section-children-list li a .section-card-desc {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.9em;
  opacity: 0.85;
  font-weight: normal;
}
:root[data-r-theme-variant="relearn-dark"] .section-children .section-children-list li a .section-card-desc {
  opacity: 0.8;
}
:root[data-r-theme-variant="relearn-dark"] .section-children .section-children-list li a {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
}
:root[data-r-theme-variant="relearn-dark"] .section-children .section-children-list li a:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Main + related sidebar + vertical ad row (baseof override) */
.main-and-ad-row { display: flex; flex-direction: column; }
.main-and-related { display: block; }
@media (min-width: 62rem) {
  .main-and-ad-row { flex-direction: row; align-items: flex-start; gap: 0; }
  /* Wrapper so main content and related sidebar share a flex row; main cannot overlap sidebar */
  .main-and-related {
    display: flex;
    flex: 1 1 0%;
    min-width: 0;
    flex-direction: row;
    align-items: flex-start;
  }
  /* Override theme #R-body-inner { flex: auto } so main shrinks and doesn't overlap sidebar */
  .main-and-related main,
  .main-and-related main#R-body-inner {
    flex: 1 1 0% !important;
    min-width: 0 !important;
    max-width: 100%;
    padding-right: 1rem;
    box-sizing: border-box;
  }
  .main-and-related main .flex-block-wrapper {
    min-width: 0 !important;
    max-width: 100% !important;
  }
  .main-and-related .related-sidebar {
    width: 200px;
    flex-shrink: 0;
    padding: 1rem 1rem 1rem 0.5rem;
    margin-right: 1rem;
    border-left: 1px solid var(--VARIABLE-BOX-border-color, rgba(0,0,0,0.08));
    box-sizing: border-box;
  }
  .main-and-ad-row .ad-sidebar-vertical { width: 220px; flex-shrink: 0; padding: 1rem 0 1rem 0.5rem; box-sizing: border-box; }
}
@media (max-width: 61.999rem) {
  .main-and-related .related-sidebar { margin: 1rem 0; padding: 1rem 0; border-top: 1px solid var(--VARIABLE-BOX-border-color, rgba(0,0,0,0.08)); border-left: none; margin-right: 0; }
  .ad-sidebar-vertical { display: none; }
}
.related-sidebar .related-title { font-size: 0.9rem; font-weight: 600; margin: 0 0 0.5rem; }
.related-sidebar .related-list { list-style: none; margin: 0; padding: 0; }
.related-sidebar .related-list li { margin: 0.35rem 0; }
.related-sidebar .related-list a { display: block; padding: 0.25rem 0; font-size: 0.9rem; }

.ad-zone.ad-skyscraper { width: 220px; min-height: 700px; background: var(--VARIABLE-BOX-background-color, #f5f5f5); border-radius: 4px; border: 1px solid rgba(0,0,0,0.08); }
:root[data-r-theme-variant="relearn-dark"] .ad-zone.ad-skyscraper { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.1); }
.ad-zone.ad-leaderboard,
.ad-zone.ad-medium {
  min-height: 120px;
  min-width: 100%;
  background: var(--VARIABLE-BOX-background-color, #f5f5f5);
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 4px;
  margin: 1.5rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ad-zone.ad-medium { min-height: 90px; }
:root[data-r-theme-variant="relearn-dark"] .ad-zone.ad-leaderboard,
:root[data-r-theme-variant="relearn-dark"] .ad-zone.ad-medium {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
}
.ad-zone .ad-placeholder { opacity: 0.8; font-size: 0.9rem; }

/* Sidebar: category link only as wide as text so row click can toggle */
#R-sidebar ul.collapsible-menu > li > a[href],
#R-sidebar ul.collapsible-menu > li > span.padding { width: auto !important; max-width: fit-content !important; }

/* Floating scroll-to-top button (bottom right) */
.scroll-to-top-btn {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 10000;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.2);
  background: var(--VARIABLE-BOX-background-color, #f5f5f5);
  color: inherit;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
}
.scroll-to-top-btn .scroll-to-top-icon {
  width: 1.25rem;
  height: 1.25rem;
}
.scroll-to-top-btn.visible {
  opacity: 1;
  pointer-events: auto;
}
.scroll-to-top-btn { border-radius: 50%; }
.scroll-to-top-btn:hover { transform: scale(1.05); box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2); }
:root[data-r-theme-variant="relearn-dark"] .scroll-to-top-btn { border-color: rgba(255, 255, 255, 0.2); background: rgba(255, 255, 255, 0.12); }
:root[data-r-theme-variant="relearn-dark"] .scroll-to-top-btn:hover { box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4); }

/* Consent banner */
.consent-banner { position: fixed; bottom: 0; left: 0; right: 0; padding: 1rem; z-index: 9999; box-shadow: 0 -2px 10px rgba(0,0,0,0.2); }
.consent-inner { max-width: 720px; margin: 0 auto; }
.consent-inner p { margin: 0 0 0.5em; font-size: 0.9rem; }
.consent-actions { display: flex; gap: 0.5rem; margin-top: 0.5rem; flex-wrap: wrap; }
.consent-banner .btn { min-height: 48px; padding: 0.6em 1.2em; border-radius: 4px; font: inherit; cursor: pointer; border: 1px solid rgba(255, 255, 255, 0.3); }
.consent-banner .btn-primary { background: var(--VARIABLE-COLOR-primary, #2c5282); color: #fff; }
.consent-banner .btn-secondary { background: rgba(128,128,128,0.3); color: inherit; }

/* Code block copy: icon only, no box */
.block-copy-to-clipboard-button.btn,
.inline-copy-to-clipboard-button.btn {
  min-height: 0 !important;
  padding: 0 !important;
  background: transparent !important;
  border: none !important;
}
.block-copy-to-clipboard-button.btn > *,
.inline-copy-to-clipboard-button.btn > * {
  min-height: 0 !important;
  padding: 0.25em !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent !important;
  border: none !important;
}
.block-copy-to-clipboard-button.btn > *:hover,
.inline-copy-to-clipboard-button.btn > *:hover {
  background: transparent !important;
  border: none !important;
  opacity: 0.8;
}
.block-copy-to-clipboard-button .fa-fw,
.inline-copy-to-clipboard-button .fa-fw {
  font-size: 0.875rem;
  width: 1em;
  line-height: 1;
}

/* Search suggestions: less transparent so they are readable before hitting enter */
#R-sidebar .autocomplete-suggestions {
  background-color: var(--INTERNAL-MAIN-BG-color);
  opacity: 1;
}
#R-html .autocomplete-suggestion,
#R-sidebar .autocomplete-suggestion {
  opacity: 1;
}
#R-html .autocomplete-suggestion.selected,
#R-html .autocomplete-suggestion:focus,
#R-html .autocomplete-suggestion:hover {
  background-color: rgba(134, 134, 134, 0.25);
}
:root[data-r-theme-variant="relearn-dark"] #R-html .autocomplete-suggestion.selected,
:root[data-r-theme-variant="relearn-dark"] #R-html .autocomplete-suggestion:focus,
:root[data-r-theme-variant="relearn-dark"] #R-html .autocomplete-suggestion:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

/* Contact page form */
.contact-form .form-row { margin-bottom: 1rem; }
.contact-form-note { margin-top: 1rem; font-size: 0.9rem; opacity: 0.9; }