Improve hero layout, gallery grid, and anchor scroll offset.

Stack hero actions in a row, center the fifth gallery item, and offset in-page navigation for the sticky header.

css/styles.css

@@ -1,4 +1,3 @@
-
 :root {
   --brand: #f78f1e;
   --brand-deep: #d96f12;
@@ -13,6 +12,9 @@
   --muted: #8b9298;
   --max-width: 72rem;
   --header-height: 5rem;
+  --notice-bar-height: 1.875rem;
+  --site-header-height: calc(var(--header-height) + var(--notice-bar-height));
+  --sticky-offset: calc((var(--site-header-height) + 0.5rem) * 0.5);
   --radius: 0.5rem;
   --radius-lg: 0.75rem;
 }
@@ -27,6 +29,10 @@ html {
   scroll-behavior: smooth;
 }
 
+main > section[id] {
+  scroll-margin-top: var(--sticky-offset);
+}
+
 @media (prefers-reduced-motion: reduce) {
   html {
     scroll-behavior: auto;
@@ -35,7 +41,11 @@ html {
 
 body {
   margin: 0;
-    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
+  font-family:
+    system-ui,
+    -apple-system,
+    "Segoe UI",
+    sans-serif;
   font-size: 1rem;
   line-height: 1.6;
   color: var(--text);
@@ -68,7 +78,6 @@ a:hover {
   margin-inline: auto;
 }
 
-
 .site-notice {
   padding-block: 0.375rem;
   text-align: center;
@@ -145,7 +154,6 @@ a:hover {
   color: var(--text);
 }
 
-
 .btn {
   display: inline-flex;
   align-items: center;
@@ -157,7 +165,10 @@ a:hover {
   font-weight: 600;
   line-height: 1.4;
   cursor: pointer;
-    transition: background 0.15s, border-color 0.15s, color 0.15s;
+  transition:
+    background 0.15s,
+    border-color 0.15s,
+    color 0.15s;
 }
 
 .btn--primary {
@@ -184,7 +195,6 @@ a:hover {
   background: var(--surface);
 }
 
-
 .hero {
   position: relative;
   padding-block: clamp(3rem, 8vw, 6rem);
@@ -196,8 +206,16 @@ a:hover {
   position: absolute;
   inset: 0;
   background:
-        radial-gradient(ellipse 80% 60% at 50% -20%, rgba(247, 143, 30, 0.18), transparent),
+    radial-gradient(
-        radial-gradient(ellipse 50% 40% at 100% 50%, rgba(0, 154, 218, 0.1), transparent);
+      ellipse 80% 60% at 50% -20%,
+      rgba(247, 143, 30, 0.18),
+      transparent
+    ),
+    radial-gradient(
+      ellipse 50% 40% at 100% 50%,
+      rgba(0, 154, 218, 0.1),
+      transparent
+    );
   pointer-events: none;
 }
 
@@ -243,7 +261,7 @@ a:hover {
   display: flex;
   flex-wrap: wrap;
   gap: 0.5rem 0.75rem;
-    margin: 0 0 1.25rem;
+  margin: 0;
   padding: 0;
   list-style: none;
 }
@@ -267,13 +285,13 @@ a:hover {
 }
 
 .hero__sub {
-    margin: 0 0 2rem;
+  margin: 2rem 0 2rem;
   font-size: clamp(1rem, 2vw, 1.125rem);
   color: var(--muted);
   line-height: 1.7;
 }
 
-.hero__actions {
+.hero__actions-row {
   display: flex;
   flex-wrap: wrap;
   align-items: flex-end;
@@ -304,7 +322,6 @@ a:hover {
   justify-content: center;
 }
 
-
 .section {
   padding-block: clamp(3rem, 6vw, 5rem);
 }
@@ -326,7 +343,6 @@ a:hover {
   color: var(--muted);
 }
 
-
 .about p {
   margin: 0 0 1rem;
   max-width: 42rem;
@@ -337,7 +353,6 @@ a:hover {
   margin-bottom: 0;
 }
 
-
 .pillars {
   display: flex;
   flex-wrap: wrap;
@@ -382,7 +397,6 @@ a:hover {
   background: var(--accent);
 }
 
-
 .features-grid {
   display: grid;
   grid-template-columns: repeat(2, 1fr);
@@ -404,7 +418,12 @@ a:hover {
 
 .feature-card--lead {
   border-color: rgba(247, 143, 30, 0.4);
-    background: linear-gradient(135deg, rgba(247, 143, 30, 0.08), rgba(0, 154, 218, 0.05), var(--surface));
+  background: linear-gradient(
+    135deg,
+    rgba(247, 143, 30, 0.08),
+    rgba(0, 154, 218, 0.05),
+    var(--surface)
+  );
 }
 
 .feature-card__icon {
@@ -441,7 +460,6 @@ a:hover {
   margin-top: 0.375rem;
 }
 
-
 .steps {
   display: grid;
   grid-template-columns: repeat(3, 1fr);
@@ -493,7 +511,6 @@ a:hover {
   color: var(--muted);
 }
 
-
 .roadmap {
   display: grid;
   grid-template-columns: repeat(3, 1fr);
@@ -529,7 +546,6 @@ a:hover {
   color: var(--muted);
 }
 
-
 .gallery {
   display: grid;
   grid-template-columns: repeat(2, 1fr);
@@ -542,6 +558,14 @@ a:hover {
   }
 }
 
+@media (min-width: 40.01rem) {
+  .gallery__item--last {
+    grid-column: 1 / -1;
+    justify-self: center;
+    width: calc((100% - 1.25rem) / 2);
+  }
+}
+
 .gallery__item {
   margin: 0;
 }
@@ -640,7 +664,6 @@ body:has(.lightbox:target) {
   border-color: var(--accent);
 }
 
-
 .cta-block {
   text-align: center;
   padding: 2.5rem 1.5rem;
@@ -669,7 +692,6 @@ body:has(.lightbox:target) {
   font-size: 0.875rem;
 }
 
-
 .contact-grid {
   display: grid;
   grid-template-columns: repeat(2, 1fr);
@@ -711,7 +733,6 @@ body:has(.lightbox:target) {
   color: var(--muted);
 }
 
-
 .site-footer {
   padding-block: 2rem 2.5rem;
   border-top: 1px solid var(--border);