Update navbar visibility and use titulosib.png logo image

frontend/src/views/LandingView.vue

@@ -4,8 +4,7 @@
     <nav class="nav-minimal" :class="{ 'scrolled': scrolled }">
       <div class="nav-inner">
         <div class="brand">
-          <img src="/icono.png" alt="SIB Logo" class="brand-icon" />
-          <span class="brand-name">SIB</span>
+          <img src="/titulosib.png" alt="SIB Logo" class="brand-logo-img" />
         </div>
         <div class="nav-links">
           <button class="nav-btn" @click="scrollToInstall">{{ t('landing.hero.howToInstall') }}</button>
@@ -94,8 +93,7 @@
     <footer class="footer-minimal">
       <div class="footer-inner">
         <div class="footer-logo">
-          <img src="/icono.png" alt="SIB" class="footer-icon" />
-          <span>SIB System</span>
+          <img src="/titulosib.png" alt="SIB" class="footer-logo-img" />
         </div>
         <p class="footer-rights">{{ t('landing.footer.rights') }}</p>
       </div>
@@ -153,17 +151,20 @@ const scrollToInstall = () => {
   top: 0;
   left: 0;
   right: 0;
-  height: 80px;
+  height: 90px;
   z-index: 1000;
-  transition: all 0.3s ease;
+  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
   display: flex;
   align-items: center;
+  background: linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, transparent 100%);
 }
 
 .nav-minimal.scrolled {
-  background: rgba(0, 0, 0, 0.8);
-  backdrop-filter: blur(20px);
-  height: 70px;
+  background: rgba(0, 0, 0, 0.85);
+  backdrop-filter: blur(25px);
+  -webkit-backdrop-filter: blur(25px);
+  height: 75px;
+  border-bottom: 1px solid rgba(255,255,255,0.05);
 }
 
 .nav-inner {
@@ -176,21 +177,10 @@ const scrollToInstall = () => {
   padding: 0 24px;
 }
 
-.brand {
-  display: flex;
-  align-items: center;
-  gap: 12px;
-}
-
-.brand-icon {
-  width: 32px;
-  height: 32px;
-}
-
-.brand-name {
-  font-size: 24px;
-  font-weight: 800;
-  letter-spacing: -0.04em;
+.brand-logo-img {
+  height: 50px;
+  width: auto;
+  object-fit: contain;
 }
 
 .nav-links {
@@ -416,18 +406,15 @@ const scrollToInstall = () => {
   align-items: center;
 }
 
-.footer-logo {
-  display: flex;
-  align-items: center;
-  gap: 12px;
-  font-weight: 700;
-  color: rgba(255, 255, 255, 0.4);
+.footer-logo-img {
+  height: 35px;
+  width: auto;
+  filter: brightness(0.7);
+  transition: filter 0.3s ease;
 }
 
-.footer-icon {
-  width: 24px;
-  height: 24px;
-  filter: grayscale(1) opacity(0.5);
+.footer-logo-img:hover {
+  filter: brightness(1);
 }
 
 .footer-rights {