Refine sign now spacing and bump to 1.2.16

frontend/src/index.css

@@ -1069,17 +1069,17 @@ select {
   gap: 8px;
 }
 
-.sign-form-card > .field + .btn-inline-toggle {
-  margin-top: 10px;
+.sign-certificate-field {
+  margin-bottom: 14px;
 }
 
-.sign-form-card > .btn-inline-toggle + .btn-full {
-  margin-top: 10px;
+.sign-details-toggle {
+  margin-bottom: 16px;
 }
 
-.sign-form-card > .btn-inline-toggle + .field,
-.sign-form-card > .info-box + .btn-full {
-  margin-top: 6px;
+.sign-form-card > .info-box + .sign-place-button,
+.sign-place-button {
+  margin-top: 0;
 }
 
 .sign-form-card form { display: flex; flex-direction: column; gap: 14px; }

frontend/src/pages/signatures/SignaturesPage.jsx

@@ -286,7 +286,7 @@ export default function SignaturesPage() {
               )}
               {uploadingDocument && <small className="field-hint">Subiendo documento...</small>}
             </div>
-            <div className="field">
+            <div className="field sign-certificate-field">
               <label><Shield size={14} /> Certificado digital</label>
               <select name="certificateId" value={form.certificateId} onChange={handleChange} required>
                 <option value="">Selecciona un certificado...</option>
@@ -296,7 +296,7 @@ export default function SignaturesPage() {
             </div>
             <button
               type="button"
-              className="btn btn-ghost btn-inline-toggle"
+              className="btn btn-ghost btn-inline-toggle sign-details-toggle"
               onClick={() => setShowAdvancedOptions((current) => !current)}
             >
               {showAdvancedOptions ? <EyeOff size={16} /> : <Eye size={16} />}
@@ -322,7 +322,7 @@ export default function SignaturesPage() {
                 </div>
               </>
             )}
-            <button className="btn btn-primary btn-full" onClick={handleGoToPlace}>
+            <button className="btn btn-primary btn-full sign-place-button" onClick={handleGoToPlace}>
               <MapPin size={16} /> Elegir posición de firma →
             </button>
           </div>