.btn{border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden;font-family:inherit}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:white;box-shadow:0 4px 15px rgba(102,126,234,.4)}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px rgba(102,126,234,.6)}.btn-secondary{background:linear-gradient(135deg,#f093fb,#f5576c);color:white;box-shadow:0 4px 15px rgba(245,87,108,.4)}.btn-secondary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px rgba(245,87,108,.6)}.btn-danger{background:linear-gradient(135deg,#fa709a,#fee140);color:white}.btn-ghost{background:rgba(255,255,255,.1);color:white;border:1px solid rgba(255,255,255,.2)}.btn-ghost:hover:not(:disabled){background:rgba(255,255,255,.2)}.btn-sm{padding:8px 16px;font-size:14px}.btn-md{padding:12px 24px;font-size:16px}.btn-lg{padding:16px 32px;font-size:18px}