.btn{white-space:nowrap;-webkit-user-select:none;user-select:none;justify-content:center;align-items:center;gap:var(--spacing-2);cursor:pointer;border-radius:var(--radius-md);font-weight:var(--font-weight-semibold);box-shadow:var(--shadow-sm);border:1px solid #0000;outline:none;font-family:inherit;text-decoration:none;transition:transform .15s cubic-bezier(.16,1,.3,1),background .15s,border-color .15s,box-shadow .15s,color .15s;display:inline-flex;position:relative}.btn:hover:not(:disabled){transform:translateY(-1.5px)}.btn:active:not(:disabled){box-shadow:var(--shadow-xs);transform:translateY(0)}.btn:focus-visible{outline:none;box-shadow:0 0 0 3px #2563eb4d}.btn:disabled{cursor:not-allowed;opacity:.55;box-shadow:none;transform:none!important}.btn-full-width{width:100%}.btn-sm{padding:var(--spacing-1_5)var(--spacing-3);font-size:var(--font-size-xs);height:32px}.btn-md{padding:var(--spacing-2)var(--spacing-4);font-size:var(--font-size-sm);height:40px}.btn-lg{padding:var(--spacing-2_5)var(--spacing-5);font-size:var(--font-size-base);height:48px}.btn-xl{padding:var(--spacing-3)var(--spacing-6);font-size:var(--font-size-lg);height:56px}.btn-primary{background:linear-gradient(135deg,var(--primary-500)0%,var(--primary-700)100%);color:#fff;border:1px solid var(--primary-600);box-shadow:0 4px 12px #2563eb40,inset 0 1px #fff3}.btn-primary:hover:not(:disabled){background:linear-gradient(135deg,var(--primary-400)0%,var(--primary-600)100%);border-color:var(--primary-500);color:#fff;box-shadow:0 6px 18px #2563eb59,inset 0 1px #ffffff4d}.btn-secondary{background:linear-gradient(180deg,var(--bg-surface)0%,var(--bg-surface-hover)100%);color:var(--text-primary);border:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.btn-secondary:hover:not(:disabled){background:var(--bg-surface-hover);border-color:var(--border-color-hover);color:var(--text-primary);box-shadow:var(--shadow-md)}.btn-success{background:linear-gradient(135deg,var(--success-500)0%,var(--success-700)100%);color:#fff;border:1px solid var(--success-600);box-shadow:0 4px 12px #22c55e40,inset 0 1px #fff3}.btn-success:hover:not(:disabled){background:linear-gradient(135deg,var(--success-400)0%,var(--success-600)100%);border-color:var(--success-500);color:#fff;box-shadow:0 6px 18px #22c55e59,inset 0 1px #ffffff4d}.btn-error{background:linear-gradient(135deg,var(--error-500)0%,var(--error-700)100%);color:#fff;border:1px solid var(--error-600);box-shadow:0 4px 12px #ef444440,inset 0 1px #fff3}.btn-error:hover:not(:disabled){background:linear-gradient(135deg,var(--error-400)0%,var(--error-600)100%);border-color:var(--error-500);color:#fff;box-shadow:0 6px 18px #ef444459,inset 0 1px #ffffff4d}.btn-warning{background:linear-gradient(135deg,var(--warning-400)0%,var(--warning-600)100%);color:#fff;border:1px solid var(--warning-500);box-shadow:0 4px 12px #f59e0b40,inset 0 1px #fff3}.btn-warning:hover:not(:disabled){background:linear-gradient(135deg,var(--warning-300)0%,var(--warning-500)100%);border-color:var(--warning-400);color:#fff;box-shadow:0 6px 18px #f59e0b59,inset 0 1px #ffffff4d}.btn-outline{color:var(--text-primary);border:1px solid var(--border-color);box-shadow:none;background:0 0}.btn-outline:hover:not(:disabled){background:var(--bg-surface-hover);border-color:var(--primary-500);color:var(--primary-600);box-shadow:var(--shadow-sm)}.btn-ghost{color:var(--text-secondary);box-shadow:none;background:0 0;border:1px solid #0000}.btn-ghost:hover:not(:disabled){background:var(--bg-surface-hover);color:var(--text-primary);box-shadow:none}.btn-link{color:var(--primary-600);box-shadow:none;background:0 0;border:1px solid #0000;text-decoration:underline}.btn-link:hover:not(:disabled){color:var(--primary-700);box-shadow:none;background:0 0;text-decoration:none;transform:translateY(-1px)}.btn-loading{pointer-events:none;position:relative}.btn-spinner{border:2px solid;border-right-color:#0000;border-radius:50%;width:16px;height:16px;animation:.8s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.btn-content{align-items:center;gap:var(--spacing-2);display:inline-flex}.btn-content-hidden{visibility:hidden}.btn-icon{justify-content:center;align-items:center;font-size:1.05em;display:inline-flex}.btn-icon-left{margin-right:var(--spacing-1)}.btn-icon-right{margin-left:var(--spacing-1)}@media (max-width:768px){.btn-lg{padding:var(--spacing-2)var(--spacing-4);font-size:var(--font-size-sm);height:44px}.btn-xl{padding:var(--spacing-2_5)var(--spacing-5);font-size:var(--font-size-base);height:48px}}