feat: page transitions, scroll progress bar, and staggered value cards

src/layouts/MainLayout.astro

@@ -42,7 +42,11 @@ const {
       rel="stylesheet"
     />
   </head>
-  <body>
+  <body class="page-ready">
+
+    <!-- Scroll progress bar -->
+    <div class="scroll-progress" id="scrollProgress" role="progressbar" aria-label="Progreso de lectura" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100"></div>
+
     <SiteHeader activeNav={activeNav} />
     <main>
       <slot />
@@ -68,17 +72,49 @@ const {
           { threshold: 0.1, rootMargin: '0px 0px -48px 0px' }
         );
 
-        document.querySelectorAll('.reveal, .reveal-left, .reveal-scale, .gold-line, .section-eyebrow').forEach((el) => {
+        document.querySelectorAll('.reveal, .reveal-left, .reveal-scale, .gold-line, .section-eyebrow, .value-card-animate').forEach((el) => {
           io.observe(el);
         });
-      }
 
-      // ─── HEADER SCROLL ELEVATION ─────────────────
+        // ─── SCROLL PROGRESS ────────────────────────
-      const header = document.querySelector('.site-header') as HTMLElement | null;
+        const progressBar = document.getElementById('scrollProgress') as HTMLElement | null;
-      if (header) {
+        if (progressBar) {
-        window.addEventListener('scroll', () => {
+          const updateProgress = () => {
-          header.classList.toggle('is-scrolled', window.scrollY > 16);
+            const scrollTop = window.scrollY;
-        }, { passive: true });
+            const docHeight = document.documentElement.scrollHeight - window.innerHeight;
+            const progress = docHeight > 0 ? (scrollTop / docHeight) * 100 : 0;
+            progressBar.style.width = `${progress}%`;
+            progressBar.setAttribute('aria-valuenow', String(Math.round(progress)));
+          };
+          window.addEventListener('scroll', updateProgress, { passive: true });
+          updateProgress();
+        }
+
+        // ─── PAGE TRANSITIONS ───────────────────────
+        // Fade IN: page loads → body gets .page-ready → CSS handles fade-in
+        document.body.classList.add('page-ready');
+
+        // Fade OUT: intercept internal navigation links
+        const handleNavClick = (e: MouseEvent) => {
+          const target = e.target as HTMLElement;
+          const anchor = target.closest('a');
+          if (!anchor) return;
+
+          const href = anchor.getAttribute('href');
+          if (!href || href.startsWith('#') || href.startsWith('http') || href.startsWith('mailto') || href.startsWith('tel') || anchor.target === '_blank') return;
+
+          e.preventDefault();
+          document.body.classList.remove('page-ready');
+          setTimeout(() => {
+            window.location.href = href;
+          }, 300);
+        };
+
+        document.addEventListener('click', handleNavClick);
+
+      } else {
+        // Reduced motion: show immediately, no transitions
+        document.body.classList.add('page-ready');
       }
     </script>
   </body>

src/pages/nosotros.astro

@@ -63,17 +63,17 @@ import MainLayout from '../layouts/MainLayout.astro';
         <h2 class="text-headline-lg reveal" style="--reveal-delay: 150;">Valores que nos definen</h2>
       </div>
       <div class="grid-3">
-        <div class="value-card">
+        <div class="value-card value-card-animate" data-value-delay="0">
           <span class="material-symbols-outlined text-primary icon-lg">verified</span>
           <h3 class="text-headline-md">Calidad</h3>
           <p class="text-body-sm text-muted leading-relaxed">Innegociable. Desde la frescura del producto hasta el último detalle del servicio de sala.</p>
         </div>
-        <div class="value-card">
+        <div class="value-card value-card-animate" data-value-delay="150">
           <span class="material-symbols-outlined text-primary icon-lg">history_edu</span>
           <h3 class="text-headline-md">Tradición</h3>
           <p class="text-body-sm text-muted leading-relaxed">Honramos las técnicas clásicas que han forjado la gran cocina, aplicándolas con respeto.</p>
         </div>
-        <div class="value-card">
+        <div class="value-card value-card-animate" data-value-delay="300">
           <span class="material-symbols-outlined text-primary icon-lg">architecture</span>
           <h3 class="text-headline-md">Vanguardia</h3>
           <p class="text-body-sm text-muted leading-relaxed">Innovamos en presentaciones y texturas para sorprender a los paladares contemporáneos.</p>
@@ -147,4 +147,39 @@ import MainLayout from '../layouts/MainLayout.astro';
     }
     .quote-card-desktop { display: block !important; }
   }
+
+  /* ─── VALUE CARD TIMELINE ANIMATION ──────────── */
+  .value-card-animate {
+    opacity: 0;
+    transform: translateY(20px) rotate(var(--card-tilt, 0deg));
+    transition:
+      opacity 600ms cubic-bezier(0.22, 1, 0.36, 1),
+      transform 600ms cubic-bezier(0.22, 1, 0.36, 1);
+    transition-delay: calc(var(--value-delay, 0) * 1ms);
+  }
+
+  .value-card-animate.visible {
+    opacity: 1;
+    transform: translateY(0) rotate(0deg);
+  }
+
+  .value-card-animate:nth-child(1) { --card-tilt: 0deg; }
+  .value-card-animate:nth-child(2) { --card-tilt: 0deg; }
+  .value-card-animate:nth-child(3) { --card-tilt: 0deg; }
+
+  /* subtle stacking effect */
+  @media (min-width: 48rem) {
+    .value-card-animate:nth-child(1) { --card-tilt: -1.5deg; }
+    .value-card-animate:nth-child(2) { --card-tilt: 0deg; }
+    .value-card-animate:nth-child(3) { --card-tilt: 1.5deg; }
+  }
 </style>
+
+<script>
+  // Override IntersectionObserver to also handle value-card timing
+  const valueCards = document.querySelectorAll('.value-card-animate');
+  valueCards.forEach((card) => {
+    const delay = (card as HTMLElement).dataset.valueDelay || '0';
+    (card as HTMLElement).style.setProperty('--value-delay', delay);
+  });
+</script>

src/styles/animations.css

@@ -255,3 +255,33 @@
     transition-duration: 0.01ms !important;
   }
 }
+
+/* ─── PAGE TRANSITIONS ────────────────────────── */
+
+body {
+  opacity: 0;
+  transition: opacity 400ms cubic-bezier(0.22, 1, 0.36, 1);
+}
+
+body.page-ready {
+  opacity: 1;
+}
+
+/* ─── SCROLL PROGRESS ────────────────────────── */
+
+.scroll-progress {
+  position: fixed;
+  top: 0;
+  left: 0;
+  height: 2px;
+  width: 0%;
+  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-container) 100%);
+  z-index: 9999;
+  transition: width 100ms linear;
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .scroll-progress {
+    display: none;
+  }
+}