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Empty state lantern

Variant: Ease-in-out

The same placeholder with the lamp on a symmetric ease-in-out, so it eases away from one edge and eases into the other like a pendulum arm. It is the calmest reading of the three and pairs well with empty states that sit inside a dense app where a decisive sweep would compete for attention. The slot lift keeps its 90ms stagger so the cascade still reads under the slower middle.

empty-stateambientloaderplaceholdersweep

The source

A complete HTML document. Paste it into an empty .html file and it plays — no stylesheet, script, font, or image to fetch.

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Empty state lantern — Ease-in-out</title>
<style>
:root {
  /* Neutrals — fixed, never remixed. */
  --ivory: #faf9f5;
  --paper: #ffffff;
  --oat: #e3dacc;
  --slate: #141413;

  /* Knobs — the remix API. A knob exists iff declared here and used below. */
  --hue: 38.8;
  --lift: 0;
  --chroma: 1;
  --round: 1;
  --speed: 1;

  /* Accents — derived from the knobs with the family's offsets baked in,
     so one hue roll moves them together. Defaults reproduce the original hex
     (#d97757 / #b85c3e / #788c5d / #b04a3f). */
  --clay: oklch(calc(0.6724 + var(--lift)) calc(0.1308 * var(--chroma)) var(--hue));
  --clay-d: oklch(calc(0.5797 + var(--lift)) calc(0.127 * var(--chroma)) var(--hue));
  --olive: oklch(calc(0.6118 + var(--lift)) calc(0.0713 * var(--chroma)) calc(var(--hue) + 88.3));
  --rust: oklch(calc(0.5408 + var(--lift)) calc(0.1357 * var(--chroma)) calc(var(--hue) - 10.3));

  /* Clock — every duration in the document runs off --t. */
  --cycle: 5.6s;
  --t: calc(var(--cycle) / var(--speed));

  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);

  /* File-specific scratch. */
  --_slot-stagger: calc(0.09s / var(--speed));
  --_glow: color-mix(in oklab, var(--clay) 70%, var(--paper));
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--ivory);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--slate);
}

.stage {
  width: min(420px, 92vw);
  padding: clamp(16px, 5vw, 26px);
  background: var(--paper);
  border: 1px solid var(--oat);
  border-radius: calc(14px * var(--round));
  box-shadow: 0 1px 0 color-mix(in oklab, var(--oat) 55%, transparent);
}

.head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: clamp(14px, 4vw, 20px);
}

.title {
  font-size: clamp(12px, 3.4vw, 13.5px);
  letter-spacing: 0.04em;
  font-weight: 600;
  color: color-mix(in oklab, var(--slate) 74%, var(--paper));
}

.pip {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--clay);
  animation: breathe var(--t) var(--ease-in-out) infinite;
}

.rail {
  position: relative;
  height: 2px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--oat) 75%, var(--paper));
  overflow: visible;
}

.lamp {
  position: absolute;
  top: 50%;
  left: 0;
  width: 34%;
  height: 2px;
  margin-top: -1px;
  border-radius: 999px;
  background: linear-gradient(90deg,
    transparent,
    var(--clay) 45%,
    var(--rust) 55%,
    transparent);
  filter: drop-shadow(0 0 6px var(--_glow));
  animation: travel var(--t) var(--ease-in-out) infinite;
}

.slots {
  margin-top: clamp(16px, 4.5vw, 22px);
  display: grid;
  gap: clamp(9px, 2.6vw, 12px);
}

.slot {
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0.42;
  animation: lift var(--t) var(--ease-in-out) infinite;
  animation-delay: calc(var(--_i) * var(--_slot-stagger));
}
.slot:nth-child(1) { --_i: 0; }
.slot:nth-child(2) { --_i: 1; }
.slot:nth-child(3) { --_i: 2; }

.dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid color-mix(in oklab, var(--oat) 90%, var(--slate));
}

.bar {
  height: 8px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--oat) 70%, var(--paper));
}
.slot:nth-child(1) .bar { width: 62%; }
.slot:nth-child(2) .bar { width: 44%; }
.slot:nth-child(3) .bar { width: 53%; }

.foot {
  margin-top: clamp(16px, 4.5vw, 22px);
  font-size: clamp(11px, 3vw, 12px);
  color: color-mix(in oklab, var(--slate) 44%, var(--paper));
  letter-spacing: 0.02em;
}

@keyframes travel {
  0%   { transform: translateX(-40%); }
  62%, 100% { transform: translateX(310%); }
}

@keyframes lift {
  0%, 14%  { opacity: 0.42; }
  34%      { opacity: 1; }
  62%, 100% { opacity: 0.42; }
}

@keyframes breathe {
  0%, 100% { opacity: 0.35; }
  34%      { opacity: 1; }
  70%      { opacity: 0.35; }
}

@media (max-width: 380px) {
  .stage { padding: 15px; }
  .slots { gap: 9px; }
}

@media (prefers-reduced-motion: reduce) {
  .lamp {
    animation: glow calc(var(--t) * 2) ease-in-out infinite;
    left: 33%;
  }
  .slot { animation-duration: calc(var(--t) * 2); animation-timing-function: ease-in-out; }
  .pip  { animation-duration: calc(var(--t) * 2); animation-timing-function: ease-in-out; }
  @keyframes glow {
    0%, 100% { opacity: 0.35; transform: none; }
    50%      { opacity: 1; transform: none; }
  }
  @keyframes lift {
    0%, 100% { opacity: 0.45; }
    50%      { opacity: 0.9; }
  }
  @keyframes breathe {
    0%, 100% { opacity: 0.4; }
    50%      { opacity: 0.9; }
  }
}
</style>
</head>
<body>
  <div class="stage" role="img" aria-label="Empty list placeholder with a light swinging across it">
    <div class="head">
      <div class="title">Nothing here yet</div>
      <div class="pip"></div>
    </div>

    <div class="rail"><div class="lamp"></div></div>

    <div class="slots">
      <div class="slot"><span class="dot"></span><span class="bar"></span></div>
      <div class="slot"><span class="dot"></span><span class="bar"></span></div>
      <div class="slot"><span class="dot"></span><span class="bar"></span></div>
    </div>

    <div class="foot">The first item will land on this line.</div>
  </div>
</body>
</html>

The variant family

Same idea, one axis moved. Compare them side by side before you commit.