Disabled Button Style: CSS Button Style & Animation

Disabled Button Style

A hatched, locked 'Continue' button that stays disabled until the terms box is ticked, then the stripes slide away. Pressing it early pulses the checkbox to show what is missing. Uses :has().

Also known as: css button disabled style, disabled button css, enable button on checkbox.

I agree to the terms

Color Base size 18px Dark background Hold hover state

HTML

<div class="btn-disabled-state">
  <label class="btn-disabled-state-terms"><input class="btn-disabled-state-input" type="checkbox"><span class="btn-disabled-state-box"></span>I agree to the terms</label>
  <button class="btn-disabled-state-btn" type="button">
    <svg viewBox="0 0 24 24" aria-hidden="true"><rect class="btn-disabled-state-lock" x="5.5" y="11" width="13" height="9" rx="2"/><path class="btn-disabled-state-lock" d="M8.5 11V8a3.5 3.5 0 0 1 7 0v3"/><path class="btn-disabled-state-arrow" d="M5 12h13M13 6.5l5.5 5.5-5.5 5.5"/></svg>
    Continue
  </button>
</div>

CSS

.btn-disabled-state {
  --c: var(--btn-color, #3b82f6);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9em;
  font: 500 var(--btn-size, 18px)/1.2 system-ui, sans-serif;
}
.btn-disabled-state-terms {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-size: 0.9em;
  cursor: pointer;
}
.btn-disabled-state-input {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}
.btn-disabled-state-box {
  position: relative;
  width: 1.15em;
  height: 1.15em;
  border-radius: 0.3em;
  box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--c) 55%, transparent);
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}
.btn-disabled-state-box::after {
  content: "";
  position: absolute;
  left: 0.38em;
  top: 0.16em;
  width: 0.3em;
  height: 0.58em;
  border: solid #fff;
  border-width: 0 0.13em 0.13em 0;
  transform: rotate(45deg) scale(0);
  transition: transform 0.25s cubic-bezier(0.3, 1.6, 0.5, 1);
}
.btn-disabled-state-btn {
  --c: var(--btn-color, #3b82f6);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.75em 1.6em;
  border: 0;
  border-radius: 0.6em;
  font: 600 var(--btn-size, 18px)/1.1 system-ui, sans-serif;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  width: 9.5em;
  font-size: 1em;
  background-color: color-mix(in srgb, var(--c) 10%, #e5e7eb);
  color: color-mix(in srgb, var(--c) 25%, #6b7280);
  cursor: not-allowed;
  transition: background-color 0.35s ease, color 0.35s ease, box-shadow 0.35s ease, transform 0.2s ease;}
.btn-disabled-state-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: repeating-linear-gradient(-45deg, transparent 0 0.45em, color-mix(in srgb, var(--c) 10%, rgba(107, 114, 128, 0.18)) 0.45em 0.9em);
  transition: transform 0.5s cubic-bezier(0.65, 0, 0.35, 1), opacity 0.5s ease;
}
.btn-disabled-state-btn svg {
  width: 1.15em;
  height: 1.15em;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.btn-disabled-state-arrow {
  opacity: 0;
  transform: translateX(-30%);
  transform-box: fill-box;
  transition: opacity 0.3s ease, transform 0.35s cubic-bezier(0.3, 1.5, 0.5, 1);
}
.btn-disabled-state-lock { transition: opacity 0.2s ease; }
.btn-disabled-state-input:focus-visible + .btn-disabled-state-box,
.btn-disabled-state-btn:focus-visible {
  outline: 2px solid var(--c);
  outline-offset: 0.2em;
}
.btn-disabled-state:has(.btn-disabled-state-btn:active) .btn-disabled-state-input:not(:checked) + .btn-disabled-state-box {
  animation: btn-disabled-state-nudge 0.6s ease-out;
}
.btn-disabled-state-input:checked + .btn-disabled-state-box {
  background-color: var(--c);
  box-shadow: inset 0 0 0 2px var(--c);
}
.btn-disabled-state-input:checked + .btn-disabled-state-box::after { transform: rotate(45deg) scale(1); }
.btn-disabled-state:has(.btn-disabled-state-input:checked) .btn-disabled-state-btn {
  background-color: var(--c);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 0.4em 1em -0.4em var(--c);
}
.btn-disabled-state:has(.btn-disabled-state-input:checked) .btn-disabled-state-btn::before {
  transform: translateX(100%);
  opacity: 0;
}
.btn-disabled-state:has(.btn-disabled-state-input:checked) .btn-disabled-state-lock { opacity: 0; }
.btn-disabled-state:has(.btn-disabled-state-input:checked) .btn-disabled-state-arrow {
  opacity: 1;
  transform: none;
  transition-delay: 0.1s;
}
.btn-disabled-state:has(.btn-disabled-state-input:checked) .btn-disabled-state-btn:active { transform: scale(0.96); }
@keyframes btn-disabled-state-nudge {
  0% { box-shadow: inset 0 0 0 2px var(--c), 0 0 0 0 color-mix(in srgb, var(--c) 60%, transparent); }
  100% { box-shadow: inset 0 0 0 2px var(--c), 0 0 0 0.6em transparent; }
}

@media (prefers-reduced-motion: reduce) {
  .btn-disabled-state, .btn-disabled-state *, .btn-disabled-state::before, .btn-disabled-state::after, .btn-disabled-state *::before, .btn-disabled-state *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

Customizing this snippet

Color: set --btn-color on the element or a parent. Currently previewing #3b82f6.
Base size: set --btn-size. Every other dimension is in em, so the whole thing scales together. Currently previewing 18px.
Speed: change the duration on the transition or animation shorthand. Staggered delays are relative, so they keep their rhythm.
Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.

Disabled Button Style

HTML

CSS

Customizing this snippet

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