*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#0a0a0a;color:#fff;min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:2rem}.btn{background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;border:none;padding:12px 24px;border-radius:8px;cursor:pointer;font-size:1rem;transition:transform .2s,box-shadow .2s}.btn:hover{transform:translateY(-2px);box-shadow:0 4px 20px rgba(99,102,241,.4)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.card-preview{width:206px;height:281px;border-radius:8px;background:#1a1a1a;border:1px solid #333}.upload-zone{border:2px dashed #444;border-radius:12px;padding:3rem;text-align:center;cursor:pointer;transition:border-color .2s}.upload-zone:hover{border-color:#6366f1}