Initial changes

src/styles/components/layout/_header.scss

@@ -0,0 +1,78 @@
+/* 
+  Header component styles
+*/
+.app-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 1rem 2rem;
+  background-color: var(--tertiary-bg);
+  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
+  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
+  position: relative;
+  z-index: var(--z-header);
+  height: var(--header-height);
+
+  h1 {
+    font-size: 1.5rem;
+    font-weight: 600;
+    color: var(--text-primary);
+    letter-spacing: 0.5px;
+    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.7);
+  }
+
+  &::after {
+    content: '';
+    position: absolute;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    height: 3px;
+    background: linear-gradient(
+      90deg,
+      var(--cream-color),
+      var(--primary-color),
+      var(--smoke-color)
+    );
+    opacity: 0.7;
+  }
+
+  &::before {
+    content: '';
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    height: 1px;
+    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
+  }
+}
+
+.header-controls {
+  display: flex;
+  gap: 1rem;
+  align-items: center;
+}
+
+.search-input {
+  background-color: var(--border-dark);
+  border: 1px solid var(--border-soft);
+  border-radius: 4px;
+  color: var(--text-primary);
+  padding: 0.6rem 1rem;
+  font-size: 0.9rem;
+  transition: all var(--duration-normal) var(--easing-ease-out);
+  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.2);
+  min-width: 200px;
+
+  &:focus {
+    border-color: var(--primary-color);
+    background-color: rgba(255, 255, 255, 0.1);
+    outline: none;
+    box-shadow: 0 0 0 2px rgba(var(--primary-color), 0.3), inset 0 2px 5px rgba(0, 0, 0, 0.2);
+  }
+
+  &::placeholder {
+    color: rgba(255, 255, 255, 0.4);
+  }
+}