<form class="lf-prop" aria-label="Animated gradient sign in">
  <div class="lf-prop-inner">
    <h2 class="lf-prop-title">Sign in</h2>
    <p class="lf-prop-sub">A small bit of magic, every time.</p>
    <label class="lf-prop-field">
      <span>Email</span>
      <input
        type="email"
        name="email"
        autocomplete="email"
        placeholder="[email protected]"
        required
      />
    </label>
    <label class="lf-prop-field">
      <span>Password</span>
      <input
        type="password"
        name="password"
        autocomplete="current-password"
        placeholder="••••••••"
        required
      />
    </label>
    <button type="submit" class="lf-prop-btn">Sign in</button>
  </div>
</form>

@property --lf-prop-angle {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}
.lf-prop {
  position: relative;
  width: 100%;
  max-width: 320px;
  border-radius: 16px;
  padding: 1.5px;
  background: conic-gradient(
    from var(--lf-prop-angle, 0deg),
    #7c6cff,
    #ff6c8a,
    #2eb88a,
    #f5b454,
    #7c6cff
  );
  animation: lfPropSpin 5s linear infinite;
}
@keyframes lfPropSpin {
  to {
    --lf-prop-angle: 360deg;
  }
}
.lf-prop::before {
  content: "";
  position: absolute;
  inset: -22px;
  z-index: -1;
  background: inherit;
  filter: blur(28px);
  opacity: 0.45;
  border-radius: inherit;
}
.lf-prop-inner {
  background: #15151d;
  border-radius: 14.5px;
  padding: 24px 22px;
  display: grid;
  gap: 12px;
}
.lf-prop-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: #f0eeff;
}
.lf-prop-sub {
  margin: -6px 0 4px;
  font-size: 12px;
  color: #b8b6d4;
}
.lf-prop-field {
  display: grid;
  gap: 5px;
  font-size: 11px;
  color: #b8b6d4;
}
.lf-prop-field input {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13px;
  color: #f0eeff;
  outline: none;
  transition:
    border-color 0.15s,
    box-shadow 0.15s;
}
.lf-prop-field input:focus {
  border-color: #7c6cff;
  box-shadow: 0 0 0 3px rgba(124, 108, 255, 0.15);
}
.lf-prop-btn {
  margin-top: 4px;
  padding: 11px;
  background: #f0eeff;
  color: #15151d;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.12s;
}
.lf-prop-btn:hover {
  transform: translateY(-1px);
}

@media (prefers-reduced-motion: reduce) {
  .lf-prop,
  .lf-prop * {
    animation: none !important;
  }
}