CSS
/* No @import here. Demos use Inter + JetBrains Mono (from
BaseLayout) and Georgia / cursive system fallbacks for the rest.
See top-of-file Fonts comment for the why. */
.ide-stage {
background: #0d1117;
/* Top padding sized so the tooltip (~280px tall, pops up from the
symbol) fully renders inside the gallery card. Without this the
card's overflow:hidden clips the top of the tip. The bottom needs
less room since the editor is anchored to flex-start. */
padding: 300px 28px 48px;
display: flex;
align-items: flex-start;
justify-content: center;
font-family: 'JetBrains Mono', ui-monospace, monospace;
}
.ide-editor {
background: #161b22;
border: 1px solid #30363d;
border-radius: 8px;
width: 100%;
max-width: 560px;
box-shadow: 0 18px 50px -16px rgba(0, 0, 0, 0.7);
}
.ide-tabs {
background: #0d1117;
border-bottom: 1px solid #30363d;
display: flex;
align-items: center;
padding: 0 14px;
height: 32px;
gap: 4px;
border-radius: 8px 8px 0 0;
}
.ide-dot {
width: 9px; height: 9px; border-radius: 50%;
background: #30363d;
}
.ide-dot:nth-child(1) { background: #ff5f57; }
.ide-dot:nth-child(2) { background: #febc2e; }
.ide-dot:nth-child(3) { background: #28c840; }
.ide-tab {
margin-left: 18px;
padding: 5px 12px;
background: #161b22;
border-radius: 6px 6px 0 0;
font-size: 11px;
color: #c9d1d9;
display: inline-flex;
align-items: center;
gap: 7px;
}
.ide-tab::before {
content: ''; width: 4px; height: 4px; border-radius: 50%;
background: #58a6ff;
}
.ide-body {
padding: 18px 0;
font-size: 13px;
/* Use a pixel line-height so the gutter and code columns advance at
the same rate — em-based line-height (1.85) combined with two
different font-sizes drifted them apart by ~2px per row and the
gutter numbers no longer matched their code lines. */
line-height: 22px;
display: flex;
color: #c9d1d9;
}
.ide-gutter {
width: 44px;
text-align: right;
padding-right: 12px;
color: #484f58;
user-select: none;
border-right: 1px solid #21262d;
/* Same font-size as the code column so digits ride the 22px baseline
in step with the code. */
font-size: 13px;
}
.ide-code { padding: 0 16px; flex: 1; min-width: 0; }
/* No white-space: pre on .ide-line. The line uses for visible
indentation, which works under white-space: normal. Setting pre
would honor the source newlines between sibling spans (especially
inside the .ide-symbol that nests the multi-line tooltip markup),
breaking each token onto its own visual row in the try-it iframe. */
.ide-line {}
.ide-kw { color: #ff7b72; }
.ide-fn { color: #d2a8ff; }
.ide-str { color: #a5d6ff; }
.ide-num { color: #79c0ff; }
.ide-cmt { color: #8b949e; font-style: italic; }
.ide-var { color: #79c0ff; }
.ide-param { color: #ffa657; }
.ide-symbol {
position: relative;
cursor: help;
/* Visible-at-rest affordance: a dashed blue underline tells users
"this token has a hover" without needing them to land on it first.
The original (transparent until hover) was a discovery failure —
users had no signal the demo had a hover tooltip at all. */
border-bottom: 1px dashed rgba(88, 166, 255, 0.55);
transition: border-color 0.2s, background 0.2s;
border-radius: 2px;
padding: 0 2px;
}
.ide-symbol::after {
/* Small info dot to the right of the symbol — second discovery cue
in case the underline gets lost in syntax highlighting. */
content: 'ⓘ';
display: inline-block;
font-size: 9px;
color: rgba(88, 166, 255, 0.6);
vertical-align: middle;
margin-left: 3px;
transition: color 0.2s;
}
.ide-symbol:hover {
border-color: #58a6ff;
background: rgba(88, 166, 255, 0.08);
}
.ide-symbol:hover::after {
color: #58a6ff;
}
.ide-tip {
position: absolute;
bottom: calc(100% + 14px);
left: -20px;
width: 380px;
background: linear-gradient(180deg, #1c2128 0%, #161b22 100%);
border: 1px solid #30363d;
border-radius: 6px;
box-shadow:
0 18px 50px -8px rgba(0, 0, 0, 0.75),
0 0 0 1px rgba(88, 166, 255, 0.06),
inset 0 1px 0 rgba(255, 255, 255, 0.04);
opacity: 0;
visibility: hidden;
transform: translateY(8px);
transition:
opacity 0.22s ease,
transform 0.22s cubic-bezier(0.22, 1, 0.36, 1),
visibility 0s linear 0.22s;
z-index: 10;
font-family: 'JetBrains Mono', ui-monospace, monospace;
pointer-events: none;
display: block;
/* Reset two properties the tip inherits from the .ide-line ancestor:
white-space: pre (which would render the source newlines between
spans as visible whitespace inside the tip) and line-height: 1.85
(the editor's loose line-height — fine for code, way too tall
inside the tooltip's prose). */
white-space: normal;
line-height: 1.5;
text-align: left;
}
.ide-symbol:hover .ide-tip {
opacity: 1;
visibility: visible;
transform: translateY(0);
transition-delay: 0s;
}
.ide-tip::after {
content: '';
position: absolute;
top: 100%;
left: 32px;
width: 10px; height: 10px;
background: #161b22;
border-right: 1px solid #30363d;
border-bottom: 1px solid #30363d;
transform: translateY(-50%) rotate(45deg);
}
.ide-tip-head {
padding: 10px 14px 9px;
border-bottom: 1px solid #21262d;
display: flex;
align-items: center;
gap: 10px;
font-size: 11px;
}
.ide-tip-badge {
background: rgba(88, 166, 255, 0.15);
color: #58a6ff;
padding: 2px 7px;
border-radius: 10px;
font-size: 9.5px;
font-weight: 600;
letter-spacing: 0.05em;
}
.ide-tip-path { color: #8b949e; font-size: 11px; }
.ide-sep { color: #484f58; margin: 0 4px; }
.ide-tip-sig {
padding: 12px 14px;
font-size: 12px;
line-height: 1.6;
border-bottom: 1px solid #21262d;
display: block;
/* Re-enable pre here so the multi-line function signature keeps its
indent. The outer .ide-tip reset this to normal so the prose
blocks (description, params, footer) don't render the source-
formatting whitespace between sibling spans. */
white-space: pre;
}
.ide-tip-desc {
padding: 12px 14px;
font-family: 'Inter', system-ui, sans-serif;
font-size: 12px;
line-height: 1.65;
color: #c9d1d9;
border-bottom: 1px solid #21262d;
display: block;
}
.ide-tip-code {
font-family: 'JetBrains Mono', ui-monospace, monospace;
background: rgba(110, 118, 129, 0.2);
color: #ffa657;
padding: 1px 5px;
border-radius: 3px;
font-size: 11px;
}
.ide-tip-params {
padding: 10px 14px;
border-bottom: 1px solid #21262d;
display: block;
}
.ide-tip-param-row {
display: grid;
grid-template-columns: 90px 1fr;
gap: 10px;
font-size: 11.5px;
padding: 3px 0;
line-height: 1.5;
}
.ide-pname { color: #ffa657; }
.ide-pdesc { color: #8b949e; font-family: 'Inter', system-ui, sans-serif; font-size: 11.5px; }
.ide-tip-foot {
padding: 9px 14px;
font-size: 10px;
color: #6e7681;
display: flex;
justify-content: space-between;
align-items: center;
}
.ide-kbd-key {
background: #21262d;
border: 1px solid #30363d;
border-bottom-width: 2px;
color: #c9d1d9;
padding: 1px 6px;
border-radius: 4px;
font-size: 10px;
margin: 0 2px;
display: inline-block;
}