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/* ==========================================================================
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;
}
}
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