Announcement Banner

A slim top-of-page bar for announcements, launches or promos.

ThemeMode
Theme tokens add once per site, shared by every block
:root {
  color-scheme: light dark;
  --color-primary: light-dark(#18181b, #fafafa);
  --color-accent: light-dark(#4f46e5, #818cf8);
  --color-bg: light-dark(#ffffff, #0b0b0d);
  --color-surface: light-dark(#f7f7f8, #161619);
  --color-text: light-dark(#0a0a0c, #f5f5f6);
  --color-text-muted: light-dark(#52525b, #a1a1aa);
  --color-border: light-dark(#e4e4e7, #26262b);
  --font-heading: 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.375rem;
  --text-4xl: 3.5rem;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 700;
  --leading-tight: 1.1;
  --leading-normal: 1.6;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
  --radius: 0.625rem;
  --shadow: 0 1px 2px rgb(10 10 12 / 0.05), 0 4px 12px rgb(10 10 12 / 0.06), 0 16px 40px rgb(10 10 12 / 0.06);
  --container-width: 1120px;
}
Theme tokens add once per site, shared by every block
:root {
  color-scheme: light dark;
  --color-primary: light-dark(#4f46e5, #818cf8);
  --color-accent: light-dark(#a855f7, #c084fc);
  --color-bg: light-dark(#ffffff, #0c0c18);
  --color-surface: light-dark(#f5f5ff, #16162b);
  --color-text: light-dark(#111127, #ececf6);
  --color-text-muted: light-dark(#5a5a72, #9d9dbd);
  --color-border: light-dark(#e4e4f2, #28284a);
  --font-heading: 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.375rem;
  --text-4xl: 3.5rem;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 700;
  --leading-tight: 1.1;
  --leading-normal: 1.6;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
  --radius: 0.75rem;
  --shadow: 0 1px 2px rgb(79 70 229 / 0.06), 0 6px 16px rgb(79 70 229 / 0.10), 0 20px 48px rgb(79 70 229 / 0.10);
  --container-width: 1120px;
}
Theme tokens add once per site, shared by every block
:root {
  color-scheme: light dark;
  --color-primary: light-dark(#0d9488, #2dd4bf);
  --color-accent: light-dark(#f97316, #fb923c);
  --color-bg: light-dark(#fbfaf8, #171412);
  --color-surface: light-dark(#f3f0ea, #221e1a);
  --color-text: light-dark(#292524, #ece7e0);
  --color-text-muted: light-dark(#6b6560, #a8a099);
  --color-border: light-dark(#e5dfd6, #37312a);
  --font-heading: Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.375rem;
  --text-4xl: 3.5rem;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 700;
  --leading-tight: 1.15;
  --leading-normal: 1.6;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
  --radius: 1rem;
  --shadow: 0 2px 6px rgb(90 75 60 / 0.06), 0 10px 28px rgb(90 75 60 / 0.10);
  --container-width: 1120px;
}
HTML
<div class="s-banner-accent">
  <p class="bn-text"><span class="bn-pill">New</span> Version 2.0 is out with 40 new blocks. <a href="#">See what changed →</a></p>
</div>
CSS block only, works with any theme's tokens
.s-banner-accent {
  background: linear-gradient(90deg, var(--color-primary), color-mix(in srgb, var(--color-primary) 60%, var(--color-accent)));
  color: var(--color-bg);
  font-family: var(--font-body);
  padding: var(--space-sm) var(--space-lg);
  text-align: center;
}
.s-banner-accent .bn-text {
  margin: 0;
  font-size: var(--text-base);
}
.s-banner-accent .bn-pill {
  display: inline-block;
  margin-right: var(--space-sm);
  padding: 0.1rem var(--space-sm);
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-bg) 22%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-bg) 30%, transparent);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.s-banner-accent a {
  color: inherit;
  font-weight: var(--weight-medium);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.s-banner-accent a:hover {
  text-decoration-thickness: 2px;
}
Theme tokens add once per site, shared by every block
:root {
  color-scheme: light dark;
  --color-primary: light-dark(#18181b, #fafafa);
  --color-accent: light-dark(#4f46e5, #818cf8);
  --color-bg: light-dark(#ffffff, #0b0b0d);
  --color-surface: light-dark(#f7f7f8, #161619);
  --color-text: light-dark(#0a0a0c, #f5f5f6);
  --color-text-muted: light-dark(#52525b, #a1a1aa);
  --color-border: light-dark(#e4e4e7, #26262b);
  --font-heading: 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.375rem;
  --text-4xl: 3.5rem;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 700;
  --leading-tight: 1.1;
  --leading-normal: 1.6;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
  --radius: 0.625rem;
  --shadow: 0 1px 2px rgb(10 10 12 / 0.05), 0 4px 12px rgb(10 10 12 / 0.06), 0 16px 40px rgb(10 10 12 / 0.06);
  --container-width: 1120px;
}
Theme tokens add once per site, shared by every block
:root {
  color-scheme: light dark;
  --color-primary: light-dark(#4f46e5, #818cf8);
  --color-accent: light-dark(#a855f7, #c084fc);
  --color-bg: light-dark(#ffffff, #0c0c18);
  --color-surface: light-dark(#f5f5ff, #16162b);
  --color-text: light-dark(#111127, #ececf6);
  --color-text-muted: light-dark(#5a5a72, #9d9dbd);
  --color-border: light-dark(#e4e4f2, #28284a);
  --font-heading: 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.375rem;
  --text-4xl: 3.5rem;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 700;
  --leading-tight: 1.1;
  --leading-normal: 1.6;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
  --radius: 0.75rem;
  --shadow: 0 1px 2px rgb(79 70 229 / 0.06), 0 6px 16px rgb(79 70 229 / 0.10), 0 20px 48px rgb(79 70 229 / 0.10);
  --container-width: 1120px;
}
Theme tokens add once per site, shared by every block
:root {
  color-scheme: light dark;
  --color-primary: light-dark(#0d9488, #2dd4bf);
  --color-accent: light-dark(#f97316, #fb923c);
  --color-bg: light-dark(#fbfaf8, #171412);
  --color-surface: light-dark(#f3f0ea, #221e1a);
  --color-text: light-dark(#292524, #ece7e0);
  --color-text-muted: light-dark(#6b6560, #a8a099);
  --color-border: light-dark(#e5dfd6, #37312a);
  --font-heading: Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.375rem;
  --text-4xl: 3.5rem;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 700;
  --leading-tight: 1.15;
  --leading-normal: 1.6;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
  --radius: 1rem;
  --shadow: 0 2px 6px rgb(90 75 60 / 0.06), 0 10px 28px rgb(90 75 60 / 0.10);
  --container-width: 1120px;
}
HTML
<div class="s-banner-dismissible">
  <div class="bn-inner">
    <p class="bn-text"><span class="bn-dot"></span>Launch week: get 30% off any plan through Friday.</p>
    <div class="bn-actions">
      <a class="bn-cta" href="#">Claim the deal</a>
      <button class="bn-close" aria-label="Dismiss">✕</button>
    </div>
  </div>
</div>
CSS block only, works with any theme's tokens
.s-banner-dismissible {
  background: linear-gradient(90deg, var(--color-text), color-mix(in srgb, var(--color-text) 80%, var(--color-primary)));
  color: var(--color-bg);
  font-family: var(--font-body);
  padding: var(--space-sm) var(--space-lg);
}
.s-banner-dismissible .bn-inner {
  max-width: var(--container-width);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}
.s-banner-dismissible .bn-text {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin: 0;
  font-size: var(--text-base);
}
.s-banner-dismissible .bn-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 999px;
  background: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 30%, transparent);
}
.s-banner-dismissible .bn-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.s-banner-dismissible .bn-cta {
  padding: var(--space-xs) var(--space-md);
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-decoration: none;
  transition: transform 0.15s ease;
}
.s-banner-dismissible .bn-cta:hover {
  transform: translateY(-1px);
}
.s-banner-dismissible .bn-close {
  background: none;
  border: none;
  color: inherit;
  font-size: var(--text-lg);
  line-height: 1;
  cursor: pointer;
  opacity: 0.7;
  padding: 0;
  transition: opacity 0.15s ease;
}
.s-banner-dismissible .bn-close:hover {
  opacity: 1;
}
@media (max-width: 560px) {
  .s-banner-dismissible .bn-inner {
    flex-direction: column;
    gap: var(--space-sm);
  }
}

Baseline 2023 — works in every up-to-date browser.

  • color-mix()Newly availableMixing colors without a preprocessor

Plus universally supported features: logical properties, custom properties. Baseline status is pulled from each feature's reference snippet.

ESC