Sign-in Card

<form class="nuda-signin">
  <div class="nuda-signin__title">Welcome back</div>
  <div class="nuda-signin__sub">Sign in to continue</div>
  <label class="nuda-signin__field">
    <input type="email" required placeholder=" " />
    <span>Email</span>
  </label>
  <label class="nuda-signin__field">
    <input type="password" required placeholder=" " />
    <span>Password</span>
  </label>
  <button class="nuda-signin__cta" type="submit">Sign in</button>
</form>

.nuda-signin {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 16px;
  width: 100%;
  max-width: 320px;
  animation: _signinIn .55s cubic-bezier(.16,1,.3,1) both;
}

.nuda-signin__title {
  color: #fafafa;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -.01em;
}

.nuda-signin__sub {
  color: #a0a0a8;
  font-size: 12px;
  margin-bottom: 6px;
}

.nuda-signin__field {
  position: relative;
  display: block;
}

.nuda-signin__field input {
  width: 100%;
  padding: 14px 12px 8px;
  background: rgba(0,0,0,.3);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 10px;
  color: #fafafa;
  font-size: 13px;
  outline: none;
  transition: border-color .2s,box-shadow .25s;
}

.nuda-signin__field span {
  position: absolute;
  left: 12px;
  top: 13px;
  font-size: 13px;
  color: #63636e;
  pointer-events: none;
  transition: transform .25s cubic-bezier(.16,1,.3,1),color .2s,font-size .25s;
}

.nuda-signin__field input:focus,.nuda-signin__field input:not(:placeholder-shown) {
  border-color: #e4ff54;
  box-shadow: 0 0 0 3px rgba(228,255,84,.12);
}

.nuda-signin__field input:focus + span,.nuda-signin__field input:not(:placeholder-shown) + span {
  transform: translateY(-9px);
  font-size: 10px;
  color: #e4ff54;
}

.nuda-signin__cta {
  margin-top: 6px;
  padding: 10px;
  background: #e4ff54;
  color: #09090b;
  border: 0;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .15s,filter .2s;
}

.nuda-signin__cta:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

@keyframes _signinIn {
  from {
    opacity: 0;
    transform: translateY(14px) scale(.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion:reduce) {
  .nuda-signin {
    animation: none;
  }
}