world-game/src/components/ui/Button.svelte

<script>
  export let variant = 'primary' // primary, secondary, outline
  export let size = 'medium' // small, medium, large
  export let disabled = false
  export let href = null
</script>

{#if href}
  <a
    {href}
    class="btn btn--{variant} btn--{size}"
    class:disabled
    on:click
  >
    <slot />
  </a>
{:else}
  <button
    class="btn btn--{variant} btn--{size}"
    {disabled}
    on:click
  >
    <slot />
  </button>
{/if}

<style>
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 2rem;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.9rem;
  }

  .btn--primary {
    background: #04fea0;
    color: #000;
    border-color: #04fea0;
  }

  .btn--primary:hover {
    background: #03d98c;
    border-color: #03d98c;
  }

  .btn--secondary {
    background: #000;
    color: #04fea0;
    border-color: #04fea0;
  }

  .btn--secondary:hover {
    background: #04fea0;
    color: #000;
  }

  .btn--outline {
    background: transparent;
    color: #fff;
    border-color: #fff;
  }

  .btn--outline:hover {
    background: #fff;
    color: #000;
  }

  .btn--small {
    padding: 0.5rem 1.5rem;
    font-size: 0.8rem;
  }

  .btn--medium {
    padding: 0.75rem 2rem;
    font-size: 0.9rem;
  }

  .btn--large {
    padding: 1rem 2.5rem;
    font-size: 1rem;
  }

  .btn:disabled,
  .btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
  }
</style>