Glow Button

---
interface Props {
  color?: string;
  href?: string;
  type?: 'button' | 'submit' | 'reset';
  size?: 'sm' | 'md' | 'lg';
  disabled?: boolean;
}

const { color = '#6366f1', href, type = 'button', size = 'md', disabled = false } = Astro.props;
const Tag = href ? 'a' : 'button';
---
<Tag 
  href={href} 
  type={href ? undefined : type}
  disabled={disabled}
  class={`glow-btn glow-btn--${size}`} 
  style={`--btn-color: ${color}`}
>
  <span class="glow-btn__content"><slot /></span>
</Tag>

<style>
  .glow-btn {
    --glow-color: var(--btn-color);
    --glow-opacity: 0.4;
    
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-sans, inherit);
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #fff;
    background: var(--btn-color);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    text-decoration: none;
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    user-select: none;
    z-index: 1;
    
    /* Layered Glow */
    box-shadow: 
      0 0 10px color-mix(in srgb, var(--glow-color), transparent 60%),
      0 0 20px color-mix(in srgb, var(--glow-color), transparent 80%);
  }

  .glow-btn__content {
    position: relative;
    z-index: 2;
  }

  .glow-btn::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--btn-color);
    border-radius: inherit;
    z-index: -1;
    opacity: 0;
    filter: blur(8px);
    transition: opacity 0.3s ease;
  }

  .glow-btn::after {
    content: '';
    position: absolute;
    inset: -8px;
    background: var(--btn-color);
    border-radius: 14px;
    opacity: 0;
    filter: blur(25px);
    transition: opacity 0.4s ease;
    z-index: -2;
  }

  .glow-btn:hover:not(:disabled) {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 
      0 0 20px color-mix(in srgb, var(--glow-color), transparent 40%),
      0 0 40px color-mix(in srgb, var(--glow-color), transparent 70%);
  }

  .glow-btn:hover:not(:disabled)::before {
    opacity: 0.4;
  }

  .glow-btn:hover:not(:disabled)::after {
    opacity: 0.7;
    animation: animate-glow 2.5s ease-in-out infinite;
  }

  .glow-btn:active:not(:disabled) {
    transform: translateY(1px) scale(0.98);
  }

  .glow-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(1);
    box-shadow: none;
  }

  @keyframes animate-glow {
    0%, 100% { opacity: 0.5; filter: blur(20px); transform: scale(1); }
    50% { opacity: 0.8; filter: blur(30px); transform: scale(1.1); }
  }

  /* Sizes */
  .glow-btn--sm { padding: 0.5rem 1.4rem; font-size: 0.75rem; }
  .glow-btn--md { padding: 0.8rem 2.2rem; font-size: 0.875rem; }
  .glow-btn--lg { padding: 1.1rem 3rem; font-size: 1rem; }
</style>