11 CSS Header Designs 06 / 11

Header with Announcement Bar

A marketing alert banner stacked above the nav inside one sticky flex-direction:column wrapper, so banner and nav move as a single unit.

Pure CSS MIT licensed
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The code

<div class="csh-06">
  <input type="checkbox" id="csh-06-dismiss" class="csh-06__dismiss">
  <div class="csh-06__stack">
    <div class="csh-06__announce">
      <div class="csh-06__announce-inner">
        <div class="csh-06__spark"></div>
        <b>FREE SHIP</b>
        <span>Free shipping on orders over $50 — ends Sunday. <a href="#">Shop the sale →</a></span>
        <label class="csh-06__close" for="csh-06-dismiss" aria-label="Dismiss announcement">
          <svg viewBox="0 0 24 24" width="13" height="13" fill="none" stroke="currentColor" stroke-width="2.5"><path d="M5 5l14 14M19 5L5 19"/></svg>
        </label>
      </div>
    </div>
    <nav class="csh-06__nav">
      <div class="csh-06__bar">
        <a href="#" class="csh-06__logo"><span>✦</span>Larder</a>
        <div class="csh-06__links">
          <a href="#">Shop</a>
          <a href="#">Bestsellers</a>
          <a href="#">Recipes</a>
          <a href="#">Gifts</a>
          <a href="#" class="csh-06__cart">Cart <b>3</b></a>
        </div>
      </div>
    </nav>
  </div>

  <section class="csh-06__hero">
    <div class="csh-06__grid"></div>
    <div>
      <h1>One sticky stack.<br><em>Banner + nav.</em></h1>
      <p>flex-direction: column · they move as one · tap ✕ to dismiss</p>
    </div>
  </section>
</div>
@import url('https://fonts.googleapis.com/css2?family=Cabinet+Grotesk:wght@400;700;800;900&family=Martian+Mono:wght@400;500&display=swap');
@import url('https://api.fontshare.com/v2/css?f[]=cabinet-grotesk@400,700,800,900&display=swap');

.csh-06, .csh-06 *, .csh-06 *::before, .csh-06 *::after { box-sizing: border-box; margin: 0; padding: 0; }
.csh-06 ::selection{background:var(--tomato);color:#fff}
.csh-06 ::-moz-selection{background:var(--tomato);color:#fff}

.csh-06{
  --cream:#fff8ee;
  --ink:#181410;
  --tomato:#e8420c;
  --berry:#b91c5c;
  --gold:#d4a017;
  font-family:'Cabinet Grotesk','Martian Mono',sans-serif;
  background:var(--cream);color:var(--ink);
  min-height:100vh;position:relative;overflow-x:hidden;
}

/* The announcement bar + nav live in ONE vertical flex wrapper that is
   sticky as a unit, so they always move together and content never gets
   covered. Dismissing the bar slides the whole stack up smoothly. */
.csh-06__stack{position:sticky;top:0;z-index:50;display:flex;flex-direction:column}

.csh-06__announce{
  background:linear-gradient(90deg,var(--tomato),var(--berry));
  color:#fff;overflow:hidden;
  display:grid;grid-template-rows:1fr;
  transition:grid-template-rows .5s cubic-bezier(.76,0,.24,1);
}
.csh-06__announce-inner{min-height:0;display:flex;align-items:center;justify-content:center;gap:14px;padding:11px 48px 11px 20px;position:relative;font-family:'Martian Mono',monospace;font-size:.74rem;letter-spacing:.04em}
.csh-06__announce-inner b{font-family:'Cabinet Grotesk',sans-serif;font-weight:800;background:#fff;color:var(--tomato);padding:2px 8px;border-radius:4px;font-size:.72rem;letter-spacing:0}
.csh-06__announce-inner a{color:#fff;text-decoration:underline;text-underline-offset:3px;font-weight:500}
.csh-06__spark{position:absolute;left:0;top:0;height:100%;width:100%;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);
  background-size:50% 100%;background-repeat:no-repeat;animation:csh-06-sweep 4s linear infinite}
@keyframes csh-06-sweep{0%{background-position:-60% 0}100%{background-position:160% 0}}
.csh-06__close{position:absolute;right:14px;top:50%;transform:translateY(-50%);width:26px;height:26px;border-radius:7px;border:none;background:rgba(255,255,255,.18);color:#fff;cursor:pointer;display:grid;place-items:center;transition:background .25s}
.csh-06__close:hover{background:rgba(255,255,255,.32)}
/* dismissed state — checkbox hack collapses the announcement row to 0 */
.csh-06__dismiss{position:absolute;opacity:0;pointer-events:none}
.csh-06__dismiss:checked ~ .csh-06__stack .csh-06__announce{grid-template-rows:0fr}

.csh-06__nav{background:rgba(255,248,238,.9);backdrop-filter:blur(14px);border-bottom:2px solid var(--ink)}
.csh-06__bar{display:flex;align-items:center;justify-content:space-between;padding:0 clamp(20px,5vw,48px);height:72px;max-width:1280px;margin:0 auto}
.csh-06__logo{font-weight:900;font-size:1.5rem;letter-spacing:-.03em;text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:9px}
.csh-06__logo span{width:30px;height:30px;background:var(--ink);color:var(--gold);display:grid;place-items:center;border-radius:8px;font-size:1rem;transform:rotate(-6deg)}
.csh-06__links{display:flex;gap:6px;align-items:center}
.csh-06__links a{position:relative;text-decoration:none;color:var(--ink);font-weight:700;font-size:.95rem;padding:8px 14px;transition:color .25s}
.csh-06__links a::after{content:'';position:absolute;left:14px;right:14px;bottom:2px;height:3px;background:var(--gold);transform:scaleX(0);transform-origin:left;transition:transform .3s cubic-bezier(.7,0,.2,1)}
.csh-06__links a:hover::after{transform:scaleX(1)}
.csh-06__links a.csh-06__cart{font-family:'Martian Mono',monospace;font-size:.78rem;font-weight:500;background:var(--ink);color:var(--cream);padding:11px 20px;border-radius:30px;text-decoration:none;display:flex;align-items:center;gap:8px;transition:transform .3s cubic-bezier(.34,1.56,.64,1),color .3s}
.csh-06__links a.csh-06__cart::after{display:none}
.csh-06__links a.csh-06__cart:hover{transform:translateY(-2px);color:var(--cream)}
.csh-06__cart b{background:var(--tomato);color:#fff;width:18px;height:18px;border-radius:50%;display:grid;place-items:center;font-size:.6rem}

.csh-06__hero{position:relative;z-index:1;min-height:80vh;display:grid;place-items:center;text-align:center;padding:8vh 24px}
.csh-06__hero h1{font-size:clamp(2.6rem,10vw,6.5rem);font-weight:900;line-height:.92;letter-spacing:-.04em}
.csh-06__hero h1 em{font-style:normal;color:var(--tomato)}
.csh-06__hero p{font-family:'Martian Mono',monospace;margin-top:22px;font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;color:rgba(24,20,16,.55)}
.csh-06__grid{position:absolute;inset:0;z-index:0;opacity:.5;pointer-events:none;
  background-image:linear-gradient(rgba(24,20,16,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(24,20,16,.05) 1px,transparent 1px);background-size:48px 48px;
  -webkit-mask-image:radial-gradient(circle at 50% 40%,black,transparent 75%);mask-image:radial-gradient(circle at 50% 40%,black,transparent 75%)}

@media (max-width:720px){.csh-06__links a:not(.csh-06__cart){display:none}.csh-06__announce-inner{font-size:.66rem;padding-right:44px}}
@media (prefers-reduced-motion: reduce){.csh-06__spark{animation:none !important}.csh-06__announce,.csh-06__cart,.csh-06__links a::after{transition:none !important}}

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