Make hero scroll linear - direct 1:1 scroll to height/opacity

app/composables/useHeroScroll.ts

@@ -1,41 +1,35 @@
 /**
  * Composable for home page hero scroll behavior
- * Starts with full-screen hero, collapses to fixed header on scroll
+ * Linear: hero shrinks 1:1 with scroll, from full screen to fixed header
  */
 export const useHeroScroll = () => {
   const scrollY = ref(0)
 
-  // Hero height = viewport height minus some space (e.g., 80px for visual balance)
+  // Hero height = viewport height minus some space
   const heroBaseHeight = ref(0)
   const collapsedHeight = 100 // Fixed header height when collapsed
 
   // Calculate hero height based on viewport
   const updateHeroHeight = () => {
     if (import.meta.client) {
-      heroBaseHeight.value = window.innerHeight - 80 // Nearly full screen
+      heroBaseHeight.value = window.innerHeight - 80
     }
   }
 
-  // How much to collapse (0 = full hero, 1 = fully collapsed)
+  // Linear: height = base - scroll, clamped to min
+  const heroHeight = computed(() => {
+    return Math.max(collapsedHeight, heroBaseHeight.value - scrollY.value)
+  })
+
+  // Linear progress 0..1
   const collapseProgress = computed(() => {
     const maxScroll = heroBaseHeight.value - collapsedHeight
     if (maxScroll <= 0) return 1
     return Math.min(1, Math.max(0, scrollY.value / maxScroll))
   })
 
-  // Current hero height (animated)
-  const heroHeight = computed(() => {
-    const maxScroll = heroBaseHeight.value - collapsedHeight
-    return Math.max(collapsedHeight, heroBaseHeight.value - scrollY.value)
-  })
-
-  // Is fully collapsed to fixed header?
-  const isCollapsed = computed(() => collapseProgress.value >= 1)
-
-  // Padding for content below hero
-  const contentPaddingTop = computed(() => {
-    return heroHeight.value
-  })
+  // Is fully collapsed?
+  const isCollapsed = computed(() => heroHeight.value <= collapsedHeight)
 
   const onScroll = () => {
     if (import.meta.client) {
@@ -69,7 +63,6 @@ export const useHeroScroll = () => {
     heroHeight,
     collapseProgress,
     isCollapsed,
-    contentPaddingTop,
     collapsedHeight
   }
 }