20 CSS Hamburger Menus 01 / 20

Pure CSS Hamburger Menu (No JavaScript)

Zero-JS checkbox state machine driving a circular clip-path reveal.

Pure CSS MIT licensed
Live Demo Open in tab
Open in playground

The code

<div class="chm-01">
  <div class="chm-01__scene">
    <div class="chm-01__field"></div>
    <div class="chm-01__grid"></div>
    <div class="chm-01__grain"></div>

    <input type="checkbox" id="chm-01-toggle" class="chm-01__toggle">
    <label class="chm-01__trigger" for="chm-01-toggle" aria-label="Toggle menu">
      <span class="chm-01__bars"><span></span><span></span><span></span></span>
    </label>

    <nav class="chm-01__panel">
      <div class="chm-01__eyebrow">Index / Navigation</div>
      <ul class="chm-01__menu">
        <li><a href="#"><span class="chm-01__idx">01</span>Atelier</a></li>
        <li><a href="#"><span class="chm-01__idx">02</span>Manifesto</a></li>
        <li><a href="#"><span class="chm-01__idx">03</span>Signals</a></li>
        <li><a href="#"><span class="chm-01__idx">04</span>Archive</a></li>
        <li><a href="#"><span class="chm-01__idx">05</span>Contact</a></li>
      </ul>
      <div class="chm-01__foot">
        <a href="#">Instagram</a><a href="#">Are.na</a><a href="#">[email protected]</a>
      </div>
    </nav>

    <div class="chm-01__stage">
      <div class="chm-01__hero">
        <h1>ZERO<br><em>JAVASCRIPT</em></h1>
        <p>Checkbox state machine · CSS sibling logic</p>
      </div>
    </div>
    <div class="chm-01__zero">PURE_CSS // 2030</div>
  </div>
</div>
@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,[email protected],300..800&family=Space+Mono:wght@400;700&display=swap');

.chm-01, .chm-01 *, .chm-01 *::before, .chm-01 *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
.chm-01 {
  --ink:#0a0a0f;
  --paper:#f4f1ea;
  --accent:#ff3d2e;
  --accent2:#00e0c6;
  --glass:rgba(244,241,234,0.04);
  min-height: 460px;display:grid;place-items:stretch;
  font-family:'Bricolage Grotesque',sans-serif;
  background:var(--ink);
  color:var(--paper);
  position:relative;
}
.chm-01__scene{position:relative;width:100%;min-height:460px;height:100%;overflow:hidden}
.chm-01__field{position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(circle at 18% 22%, rgba(255,61,46,0.18), transparent 42%),
    radial-gradient(circle at 82% 78%, rgba(0,224,198,0.16), transparent 45%),
    var(--ink);
}
.chm-01__grid{position:absolute;inset:0;z-index:0;opacity:.5;
  background-image:
    linear-gradient(rgba(244,241,234,0.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(244,241,234,0.04) 1px,transparent 1px);
  background-size:54px 54px;
  -webkit-mask-image:radial-gradient(circle at 50% 50%,black,transparent 80%);
  mask-image:radial-gradient(circle at 50% 50%,black,transparent 80%);
}
.chm-01__grain{position:absolute;inset:0;z-index:1;pointer-events:none;opacity:.06;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}
.chm-01__stage{position:relative;z-index:2;min-height:460px;display:grid;place-items:center}
.chm-01__toggle{position:absolute;opacity:0;pointer-events:none}
.chm-01__trigger{
  position:absolute;top:24px;right:24px;z-index:40;
  width:64px;height:64px;border-radius:50%;
  display:grid;place-items:center;cursor:pointer;
  background:var(--glass);
  border:1px solid rgba(244,241,234,0.12);
  backdrop-filter:blur(14px);
  transition:transform .5s cubic-bezier(.16,1,.3,1),border-color .4s;
}
.chm-01__trigger:hover{transform:scale(1.06);border-color:var(--accent)}
.chm-01__bars{width:26px;height:16px;position:relative;display:block}
.chm-01__bars span{position:absolute;left:0;height:2px;width:100%;background:var(--paper);border-radius:2px;
  transition:transform .5s cubic-bezier(.7,0,.2,1),width .5s,opacity .35s,background .4s}
.chm-01__bars span:nth-child(1){top:0}
.chm-01__bars span:nth-child(2){top:7px;width:70%}
.chm-01__bars span:nth-child(3){top:14px}
.chm-01__toggle:checked ~ .chm-01__trigger .chm-01__bars span:nth-child(1){transform:translateY(7px) rotate(45deg);background:var(--accent)}
.chm-01__toggle:checked ~ .chm-01__trigger .chm-01__bars span:nth-child(2){opacity:0;width:0}
.chm-01__toggle:checked ~ .chm-01__trigger .chm-01__bars span:nth-child(3){transform:translateY(-7px) rotate(-45deg);background:var(--accent)}
.chm-01__toggle:checked ~ .chm-01__trigger{border-color:var(--accent)}
.chm-01__panel{
  position:absolute;inset:0;z-index:30;
  display:flex;flex-direction:column;justify-content:center;
  padding:0 9%;
  background:rgba(10,10,15,0.82);
  backdrop-filter:blur(26px) saturate(140%);
  -webkit-clip-path:circle(0% at calc(100% - 56px) 56px);
  clip-path:circle(0% at calc(100% - 56px) 56px);
  transition:clip-path .8s cubic-bezier(.76,0,.24,1),-webkit-clip-path .8s cubic-bezier(.76,0,.24,1);
  pointer-events:none;
}
.chm-01__toggle:checked ~ .chm-01__panel{
  -webkit-clip-path:circle(160% at calc(100% - 56px) 56px);
  clip-path:circle(160% at calc(100% - 56px) 56px);
  pointer-events:auto;
}
.chm-01__eyebrow{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.5em;text-transform:uppercase;color:var(--accent2);margin-bottom:24px;opacity:0;transition:opacity .4s}
.chm-01__toggle:checked ~ .chm-01__panel .chm-01__eyebrow{opacity:1;transition-delay:.45s}
.chm-01__menu{list-style:none}
.chm-01__menu li{overflow:hidden}
.chm-01__menu a{
  font-size:clamp(1.4rem,4.5vw,2.8rem);font-weight:300;line-height:1.05;
  color:var(--paper);text-decoration:none;display:inline-block;
  transform:translateY(120%);transition:transform .7s cubic-bezier(.16,1,.3,1),color .3s;
}
.chm-01__menu a .chm-01__idx{font-family:'Space Mono',monospace;font-size:.7rem;vertical-align:super;color:var(--accent);margin-right:.6em;font-weight:700}
.chm-01__menu a:hover{color:var(--accent)}
.chm-01__toggle:checked ~ .chm-01__panel .chm-01__menu li:nth-child(1) a{transform:translateY(0);transition-delay:.42s}
.chm-01__toggle:checked ~ .chm-01__panel .chm-01__menu li:nth-child(2) a{transform:translateY(0);transition-delay:.50s}
.chm-01__toggle:checked ~ .chm-01__panel .chm-01__menu li:nth-child(3) a{transform:translateY(0);transition-delay:.58s}
.chm-01__toggle:checked ~ .chm-01__panel .chm-01__menu li:nth-child(4) a{transform:translateY(0);transition-delay:.66s}
.chm-01__toggle:checked ~ .chm-01__panel .chm-01__menu li:nth-child(5) a{transform:translateY(0);transition-delay:.74s}
.chm-01__foot{margin-top:30px;font-family:'Space Mono',monospace;font-size:11px;color:rgba(244,241,234,0.5);display:flex;gap:18px;flex-wrap:wrap;opacity:0;transition:opacity .4s}
.chm-01__toggle:checked ~ .chm-01__panel .chm-01__foot{opacity:1;transition-delay:.85s}
.chm-01__foot a{color:inherit;text-decoration:none}
.chm-01__foot a:hover{color:var(--accent2)}
.chm-01__hero{text-align:center;padding:0 24px}
.chm-01__hero h1{font-size:clamp(2.2rem,8vw,5rem);font-weight:800;letter-spacing:-.04em;line-height:.9}
.chm-01__hero h1 em{font-style:normal;color:var(--accent);font-weight:300}
.chm-01__hero p{font-family:'Space Mono',monospace;margin-top:18px;letter-spacing:.3em;text-transform:uppercase;font-size:10px;color:rgba(244,241,234,0.55)}
.chm-01__zero{font-family:'Space Mono',monospace;position:absolute;bottom:18px;left:24px;z-index:5;font-size:10px;letter-spacing:.3em;color:rgba(244,241,234,0.4)}

@media (prefers-reduced-motion: reduce){
  .chm-01__trigger,.chm-01__bars span,.chm-01__panel,.chm-01__eyebrow,.chm-01__menu a,.chm-01__foot{transition:none !important}
}

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