1 files changed, 162 insertions, 0 deletions
diff --git a/assets/css/scroll-to-top.css b/assets/css/scroll-to-top.css
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+++ b/assets/css/scroll-to-top.css
@@ -0,0 +1,162 @@
+/* ==========================================================================
+   scroll-to-top.css — floating "back to top" control
+   Loaded by assets/js/scroll-to-top.js on www and sibling *.sillylaird.ca hosts.
+   Self-contained so sibling pages that do not load site.css still look right.
+   Selectors are more specific than site.css's `a:hover` so the global link
+   glow / scale does not leak onto the control.
+   ========================================================================== */
+
+a.scroll-to-top {
+  --stt-bg: var(--bg, #000000);
+  --stt-ink: var(--gold, #8b0000);
+  --stt-border: var(--border, #3a0000);
+  --stt-hover: var(--accent-cyan, #8b0000);
+  position: fixed;
+  right: max(0.85rem, env(safe-area-inset-right, 0px));
+  bottom: max(1.1rem, env(safe-area-inset-bottom, 0px));
+  z-index: 10050;
+  box-sizing: border-box;
+  width: 2.75rem;
+  height: 2.75rem;
+  margin: 0;
+  padding: 0.2rem 0 0.15rem;
+  display: inline-flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 0.05rem;
+  border: 1px solid var(--stt-border);
+  border-radius: 6px;
+  background: var(--stt-bg);
+  color: var(--stt-ink);
+  font-family: "JetBrains Mono", "IBM Plex Mono", "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
+  font-size: 0.58rem;
+  font-weight: 700;
+  letter-spacing: 0.14em;
+  line-height: 1;
+  text-decoration: none;
+  text-transform: uppercase;
+  text-shadow: none;
+  box-shadow:
+    0 0 0 1px rgba(160, 0, 0, .18),
+    0 0 14px -2px rgba(160, 0, 0, .4),
+    inset 0 0 10px rgba(160, 0, 0, .12);
+  opacity: 0;
+  visibility: hidden;
+  pointer-events: none;
+  transform: translateY(10px);
+  transition:
+    opacity .2s ease,
+    visibility .2s ease,
+    transform .2s ease,
+    color .15s ease,
+    border-color .15s ease,
+    box-shadow .25s ease,
+    background-color .15s ease;
+  touch-action: manipulation;
+  -webkit-tap-highlight-color: transparent;
+}
+
+a.scroll-to-top.is-visible {
+  opacity: 1;
+  visibility: visible;
+  pointer-events: auto;
+  transform: none;
+}
+
+a.scroll-to-top .scroll-to-top-caret {
+  font-size: 0.85rem;
+  letter-spacing: 0;
+  line-height: 1;
+  transform: translateY(1px);
+}
+
+a.scroll-to-top .scroll-to-top-label {
+  font-size: 0.52rem;
+  letter-spacing: 0.16em;
+}
+
+a.scroll-to-top:hover,
+a.scroll-to-top:focus-visible {
+  background: var(--stt-bg);
+  color: var(--stt-hover);
+  text-decoration: none;
+  text-shadow:
+    0 0 6px rgba(255, 0, 0, .85),
+    0 0 14px rgba(139, 0, 0, .45);
+  border-color: rgba(255, 0, 0, .75);
+  border-radius: 6px;
+  transform: none;
+  box-shadow:
+    0 0 0 1px rgba(255, 0, 0, .45),
+    0 0 16px rgba(139, 0, 0, .4),
+    0 0 32px -6px rgba(139, 0, 0, .35),
+    inset 0 0 10px rgba(139, 0, 0, .08);
+}
+
+a.scroll-to-top:focus-visible {
+  outline: 2px solid var(--stt-hover);
+  outline-offset: 2px;
+}
+
+a.scroll-to-top:active {
+  transform: translateY(1px);
+}
+
+/* Light theme — www uses body.light-mode; blog uses data-blog-theme */
+body.light-mode a.scroll-to-top,
+html[data-blog-theme="light"] a.scroll-to-top {
+  --stt-bg: #fff8f1;
+  --stt-ink: #8b0000;
+  --stt-border: #e8c8c8;
+  --stt-hover: #5a0000;
+  box-shadow:
+    0 1px 0 rgba(255, 255, 255, .95) inset,
+    0 8px 22px rgba(139, 0, 0, .16);
+}
+
+body.light-mode a.scroll-to-top:hover,
+body.light-mode a.scroll-to-top:focus-visible,
+html[data-blog-theme="light"] a.scroll-to-top:hover,
+html[data-blog-theme="light"] a.scroll-to-top:focus-visible {
+  background: #ffffff;
+  color: #5a0000;
+  text-shadow: none;
+  border-color: #8b0000;
+  box-shadow:
+    0 0 0 1px rgba(139, 0, 0, .35),
+    0 8px 22px rgba(139, 0, 0, .22);
+}
+
+/* When the visit-counter has no footer to live in, it docks bottom-right.
+   Lift it so the two chips do not sit on top of each other. */
+body.has-scroll-to-top #site-visit-counter[data-stt-docked="1"] {
+  bottom: 4.65rem;
+}
+
+@media (max-width: 520px) {
+  a.scroll-to-top {
+    width: 2.55rem;
+    height: 2.55rem;
+    right: max(0.65rem, env(safe-area-inset-right, 0px));
+    bottom: max(0.85rem, env(safe-area-inset-bottom, 0px));
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  a.scroll-to-top,
+  a.scroll-to-top.is-visible,
+  a.scroll-to-top:hover,
+  a.scroll-to-top:focus-visible,
+  a.scroll-to-top:active {
+    transition: none;
+    transform: none;
+  }
+}
+
+@media print {
+  a.scroll-to-top,
+  .footer-back-to-top {
+    display: none !important;
+  }
+}