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Luna UI
Luna UI
alert / flash webcore y2k
(1) system message
HTML
<div class="tv-webcore-message" role="status">
  <span class="tv-webcore-message-text"><span class="tv-webcore-message-count">(1)</span> system message</span>
  <svg class="tv-webcore-message-bubble" viewBox="0 0 32 20" aria-hidden="true"><path d="M4 1.5h24a2.5 2.5 0 0 1 2.5 2.5v7a2.5 2.5 0 0 1-2.5 2.5H15l-6 5v-5H4A2.5 2.5 0 0 1 1.5 11V4A2.5 2.5 0 0 1 4 1.5z" fill="none" stroke="currentColor" stroke-width="1.5" /></svg>
  <button class="tv-webcore-message-close" type="button" aria-label="Dismiss"></button>
</div>
CSS
/* A system message strip: inset label, optional speech bubble and a square dismiss key. */
.tv-webcore-message {
  --tv-webcore-message-face: var(--tv-webcore-lilac, #a49bf3);
  --tv-webcore-message-ink: var(--tv-webcore-paper, #ffffff);
  display: flex;
  align-items: center;
  gap: 10px;
  box-sizing: border-box;
  width: 100%;
  max-width: 24rem;
  margin: 0 auto;
  padding: 6px;
  border: 2px solid var(--tv-webcore-navy, #2c2b9f);
  background: var(--tv-webcore-message-face, #a49bf3);
  color: var(--tv-webcore-message-ink, #ffffff);
  font-family: "Lucida Console", "Courier New", ui-monospace, monospace;
}

.tv-webcore-message-text {
  flex: 1;
  min-width: 0;
  padding: 7px 10px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--tv-webcore-message-ink, #ffffff) 75%, transparent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-align: center;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.tv-webcore-message-bubble {
  display: none;
  flex-shrink: 0;
  width: 32px;
  height: 20px;
}

.tv-webcore-message-close {
  position: relative;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--tv-webcore-navy, #2c2b9f);
  background: var(--tv-webcore-paper, #ffffff);
  cursor: pointer;
}

.tv-webcore-message-close::before,
.tv-webcore-message-close::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 2px;
  background: var(--tv-webcore-navy, #2c2b9f);
  transform: translate(-50%, -50%) rotate(45deg);
}

.tv-webcore-message-close::after {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.tv-webcore-message-close:hover {
  background: var(--tv-webcore-pink, #f7b5e4);
}

.tv-webcore-message-close:focus-visible {
  outline: 2px dashed var(--tv-webcore-message-ink, #ffffff);
  outline-offset: 2px;
}

.tv-webcore-message--pink {
  --tv-webcore-message-face: var(--tv-webcore-pink, #f7b5e4);
  --tv-webcore-message-ink: var(--tv-webcore-navy, #2c2b9f);
}

/* Plain: grey face, big navy type, a speech bubble and a lilac key. */
.tv-webcore-message--plain {
  --tv-webcore-message-face: var(--tv-webcore-grey, #d9d9e5);
  --tv-webcore-message-ink: var(--tv-webcore-navy, #2c2b9f);
  border-color: var(--tv-webcore-lilac, #a49bf3);
}

.tv-webcore-message--plain .tv-webcore-message-text {
  padding-inline: 6px;
  border: 0;
  font-size: 20px;
  text-align: left;
}

.tv-webcore-message--plain .tv-webcore-message-count {
  display: none;
}

.tv-webcore-message--plain .tv-webcore-message-bubble {
  display: block;
}

.tv-webcore-message--plain .tv-webcore-message-close {
  background: var(--tv-webcore-lilac, #a49bf3);
}
Markdown MIT License
Usage & credits
Use when
Site notices, new-post or guestbook alerts, playful status lines above content.
Avoid when
Errors people must act on, or more than one sentence of text.
Requires
Wire the dismiss button yourself; it has an accessible label but no behaviour.