A collapsed Thought for 12s row whose chevron turns as the reasoning panel opens, the muted thoughts blur in beside a hairline rule, and the answer below slides down to make room.
Also known as: thought for seconds animation, reasoning dropdown ui, collapsible thinking block, chain of thought ui.
Two requests can both read count = 4 before either one writes, so the limit check passes twice. A lock would work, but a conditional UPDATE is simpler.
Move the check into the UPDATE itself, so the database settles the race:
<div class="aia-thought-for-disclosure" role="status" aria-label="Thought for 12 seconds">
<div class="aia-thought-for-disclosure-head">
<svg class="aia-thought-for-disclosure-clock" viewBox="0 0 24 24" aria-hidden="true"><circle cx="12" cy="12" r="8.5"/><path d="M12 7.5V12l3 2"/></svg>
<span>Thought for 12s</span>
<svg class="aia-thought-for-disclosure-chev" viewBox="0 0 24 24" aria-hidden="true"><path d="m9.5 6 6 6-6 6"/></svg>
</div>
<div class="aia-thought-for-disclosure-panel">
<p class="aia-thought-for-disclosure-body">Two requests can both read count = 4 before either one writes, so the limit check passes twice. A lock would work, but a conditional UPDATE is simpler.</p>
</div>
<p class="aia-thought-for-disclosure-answer">Move the check into the UPDATE itself, so the database settles the race:</p>
</div>.aia-thought-for-disclosure {
--c: var(--aia-color, #7c5cff);
font-size: var(--aia-size, 16px);
font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
line-height: 1.4;
width: 24em;
max-width: 100%;
height: 9.5em;
}
.aia-thought-for-disclosure-head {
display: inline-flex;
align-items: center;
gap: 0.45em;
font-size: 0.95em;
font-weight: 500;
animation: aia-thought-for-disclosure-head 9s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}
.aia-thought-for-disclosure-head svg {
fill: none;
stroke: currentColor;
stroke-width: 2;
stroke-linecap: round;
stroke-linejoin: round;
}
.aia-thought-for-disclosure-clock {
width: 1.1em;
height: 1.1em;
}
.aia-thought-for-disclosure-chev {
width: 1em;
height: 1em;
animation: aia-thought-for-disclosure-chev 9s infinite;
}
.aia-thought-for-disclosure-panel {
overflow: hidden;
max-height: 0;
animation: aia-thought-for-disclosure-open 9s infinite;
}
.aia-thought-for-disclosure-body {
margin: 0.6em 0 0.3em 0.55em;
padding-left: 0.9em;
border-left: 1px solid color-mix(in srgb, currentColor 18%, transparent);
font-size: 0.9em;
line-height: 1.55;
color: color-mix(in srgb, currentColor 58%, transparent);
animation: aia-thought-for-disclosure-body 9s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}
.aia-thought-for-disclosure-answer {
margin: 0.55em 0 0;
line-height: 1.5;
}
@keyframes aia-thought-for-disclosure-head {
0%, 12%, 88%, 100% { opacity: 0.55; }
20%, 78% { opacity: 0.9; }
}
@keyframes aia-thought-for-disclosure-chev {
0%, 12% { transform: rotate(0deg); animation-timing-function: cubic-bezier(0.3, 1.5, 0.5, 1); }
20%, 76% { transform: rotate(90deg); animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1); }
84%, 100% { transform: rotate(0deg); }
}
@keyframes aia-thought-for-disclosure-open {
0%, 12% { max-height: 0; animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1); }
26%, 76% { max-height: 6.5em; animation-timing-function: cubic-bezier(0.6, 0, 0.3, 1); }
88%, 100% { max-height: 0; }
}
@keyframes aia-thought-for-disclosure-body {
0%, 15% { opacity: 0; transform: translateY(-0.4em); filter: blur(0.15em); }
30%, 72% { opacity: 1; transform: none; filter: blur(0); }
80%, 100% { opacity: 0; transform: translateY(-0.2em); filter: blur(0.15em); }
}
@media (prefers-reduced-motion: reduce) {
.aia-thought-for-disclosure-head,
.aia-thought-for-disclosure-chev,
.aia-thought-for-disclosure-panel,
.aia-thought-for-disclosure-body { animation: none; }
.aia-thought-for-disclosure-chev { transform: rotate(90deg); }
.aia-thought-for-disclosure-panel { max-height: none; }
}
@media (prefers-reduced-motion: reduce) {
.aia-thought-for-disclosure, .aia-thought-for-disclosure *, .aia-thought-for-disclosure::before, .aia-thought-for-disclosure::after, .aia-thought-for-disclosure *::before, .aia-thought-for-disclosure *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}--aia-color on the element or a parent.
Currently previewing #3b82f6.--aia-size. Every other dimension is in
em, so the whole thing scales together. Currently previewing 16px.transition or animation
shorthand. Staggered delays are relative, so they keep their rhythm.