Fix CSS cascade layers and header layout

- Rewrite globals.css to work properly with Tailwind 4 cascade layers
  - Remove conflicting * { padding: 0 } reset that broke Tailwind utilities
  - Organize styles into @layer base, @layer components, @layer utilities
- Fix newsletter centering (was off due to CSS layer conflicts)
- Fix header overlap on products pages (proper pt-[72px] spacing)
- Add solid header background (bg-white/80) instead of transparent
- Fix logo/nav positioning on desktop

Verified fixes with Playwright screenshots at 1280x800 and 390x844

src/app/globals.css

@@ -2,61 +2,11 @@
 
 /* ============================================
    MANOONOILS DESIGN SYSTEM
-   Inspired by premium skincare brands
+   Tailwind 4 compatible - uses CSS layers
    ============================================ */
 
-:root {
-  /* Primary Colors */
-  --color-white: #ffffff;
-  --color-background: #fafafa;
-  --color-background-alt: #f5f5f5;
-  --color-foreground: #1a1a1a;
-  --color-foreground-muted: #666666;
-  --color-foreground-subtle: #999999;
-  
-  /* Accent Colors */
-  --color-accent: #e8f0f5;
-  --color-accent-dark: #a8c5d8;
-  --color-accent-blue: #e8f0f5;
-  --color-gold: #c9a962;
-  --color-gold-light: #d4b978;
-  
-  /* UI Colors */
-  --color-border: #e5e5e5;
-  --color-border-dark: #d1d1d1;
-  --color-cta: #000000;
-  --color-cta-hover: #333333;
-  --color-overlay: rgba(0, 0, 0, 0.4);
-  
-  /* Spacing */
-  --space-xs: 4px;
-  --space-sm: 8px;
-  --space-md: 16px;
-  --space-lg: 24px;
-  --space-xl: 32px;
-  --space-2xl: 48px;
-  --space-3xl: 64px;
-  --space-4xl: 96px;
-  --space-5xl: 128px;
-  
-  /* Typography */
-  --font-display: 'DM Sans', sans-serif;
-  --font-body: 'Inter', sans-serif;
-  
-  /* Transitions */
-  --transition-fast: 150ms ease;
-  --transition-base: 250ms ease;
-  --transition-slow: 350ms ease;
-  
-  /* Shadows */
-  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
-  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
-  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
-  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
-}
-
 @theme inline {
-  /* Colors - reference :root variables */
+  /* Colors - reference CSS variables */
   --color-white: var(--color-white);
   --color-background: var(--color-background);
   --color-background-alt: var(--color-background-alt);
@@ -79,6 +29,43 @@
   --font-body: var(--font-body);
 }
 
+/* ============================================
+   CSS VARIABLES
+   ============================================ */
+
+:root {
+  --color-white: #ffffff;
+  --color-background: #fafafa;
+  --color-background-alt: #f5f5f5;
+  --color-foreground: #1a1a1a;
+  --color-foreground-muted: #666666;
+  --color-foreground-subtle: #999999;
+  
+  --color-accent: #e8f0f5;
+  --color-accent-dark: #a8c5d8;
+  --color-accent-blue: #e8f0f5;
+  --color-gold: #c9a962;
+  --color-gold-light: #d4b978;
+  
+  --color-border: #e5e5e5;
+  --color-border-dark: #d1d1d1;
+  --color-cta: #000000;
+  --color-cta-hover: #333333;
+  --color-overlay: rgba(0, 0, 0, 0.4);
+  
+  --font-display: 'DM Sans', sans-serif;
+  --font-body: 'Inter', sans-serif;
+  
+  --transition-fast: 150ms ease;
+  --transition-base: 250ms ease;
+  --transition-slow: 350ms ease;
+  
+  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
+  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
+  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
+  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
+}
+
 /* ============================================
    FONT IMPORTS
    ============================================ */
@@ -98,307 +85,276 @@
 }
 
 /* ============================================
-   BASE STYLES
+   BASE STYLES (in Tailwind base layer)
    ============================================ */
 
-* {
+@layer base {
-  box-sizing: border-box;
+  html {
-  margin: 0;
+    scroll-behavior: smooth;
-  padding: 0;
+  }
-}
+  
-
+  body {
-html {
+    background: var(--color-background);
-  scroll-behavior: smooth;
+    color: var(--color-foreground);
-}
+    font-family: var(--font-body);
-
+    font-size: 16px;
-body {
+    line-height: 1.6;
-  background: var(--color-background);
+    -webkit-font-smoothing: antialiased;
-  color: var(--color-foreground);
+    -moz-osx-font-smoothing: grayscale;
-  font-family: var(--font-body);
+  }
-  font-size: 16px;
+  
-  line-height: 1.6;
+  h1, h2, h3, h4, h5, h6 {
-  -webkit-font-smoothing: antialiased;
+    font-family: var(--font-display);
-  -moz-osx-font-smoothing: grayscale;
+    font-weight: 500;
+    line-height: 1.2;
+    letter-spacing: -0.02em;
+  }
+  
+  h1 {
+    font-size: clamp(2rem, 5vw, 3.5rem);
+  }
+  
+  h2 {
+    font-size: clamp(1.5rem, 4vw, 2.5rem);
+  }
+  
+  h3 {
+    font-size: clamp(1.25rem, 3vw, 1.75rem);
+  }
+  
+  input, textarea, select {
+    font-family: var(--font-body);
+    font-size: 16px;
+  }
+  
+  input:focus, textarea:focus, select:focus {
+    outline: none;
+    border-color: var(--color-foreground);
+  }
+  
+  :focus-visible {
+    outline: 2px solid var(--color-foreground);
+    outline-offset: 2px;
+  }
 }
 
 /* ============================================
-   TYPOGRAPHY
+   COMPONENTS
    ============================================ */
 
-h1, h2, h3, h4, h5, h6 {
+@layer components {
-  font-family: var(--font-display);
-  font-weight: 500;
-  line-height: 1.2;
-  letter-spacing: -0.02em;
-}
-
-h1 {
-  font-size: clamp(2rem, 5vw, 3.5rem);
-}
-
-h2 {
-  font-size: clamp(1.5rem, 4vw, 2.5rem);
-}
-
-h3 {
-  font-size: clamp(1.25rem, 3vw, 1.75rem);
-}
-
-.text-display {
-  font-family: var(--font-display);
-  font-weight: 500;
-  letter-spacing: -0.02em;
-}
-
-.text-body {
-  font-family: var(--font-body);
-}
-
-.text-uppercase {
-  text-transform: uppercase;
-  letter-spacing: 0.05em;
-}
-
-.text-caption {
-  font-size: 12px;
-  text-transform: uppercase;
-  letter-spacing: 0.1em;
-  font-weight: 500;
-}
-
-.text-muted {
-  color: var(--color-foreground-muted);
-}
-
-.text-subtle {
-  color: var(--color-foreground-subtle);
-}
-
-/* ============================================
-   UTILITY CLASSES
-   ============================================ */
-
-.container {
-  width: 100%;
-  max-width: 1400px;
-  margin-left: auto;
-  margin-right: auto;
-  padding-left: 24px;
-  padding-right: 24px;
-}
-
-@media (min-width: 640px) {
   .container {
-    padding-left: 32px;
+    width: 100%;
-    padding-right: 32px;
+    max-width: 1400px;
+    margin-left: auto;
+    margin-right: auto;
+    padding-left: 24px;
+    padding-right: 24px;
   }
-}
+  
-
+  @media (min-width: 640px) {
-@media (min-width: 1024px) {
+    .container {
-  .container {
+      padding-left: 32px;
-    padding-left: 48px;
+      padding-right: 32px;
-    padding-right: 48px;
+    }
+  }
+  
+  @media (min-width: 1024px) {
+    .container {
+      padding-left: 48px;
+      padding-right: 48px;
+    }
+  }
+  
+  .container-narrow {
+    max-width: 1200px;
+  }
+  
+  .container-wide {
+    max-width: 1600px;
+  }
+  
+  .btn {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    padding: 14px 32px;
+    font-size: 13px;
+    font-weight: 500;
+    text-transform: uppercase;
+    letter-spacing: 0.05em;
+    border: none;
+    cursor: pointer;
+    transition: all var(--transition-base);
+  }
+  
+  .btn-primary {
+    background: var(--color-cta);
+    color: var(--color-white);
+  }
+  
+  .btn-primary:hover {
+    background: var(--color-cta-hover);
+  }
+  
+  .btn-secondary {
+    background: transparent;
+    color: var(--color-foreground);
+    border: 1px solid var(--color-border-dark);
+  }
+  
+  .btn-secondary:hover {
+    background: var(--color-foreground);
+    color: var(--color-white);
+    border-color: var(--color-foreground);
+  }
+  
+  .link-underline {
+    position: relative;
+    text-decoration: none;
+  }
+  
+  .link-underline::after {
+    content: '';
+    position: absolute;
+    bottom: -2px;
+    left: 0;
+    width: 0;
+    height: 1px;
+    background: currentColor;
+    transition: width var(--transition-base);
+  }
+  
+  .link-underline:hover::after {
+    width: 100%;
+  }
+  
+  .text-display {
+    font-family: var(--font-display);
+    font-weight: 500;
+    letter-spacing: -0.02em;
+  }
+  
+  .text-body {
+    font-family: var(--font-body);
+  }
+  
+  .text-uppercase {
+    text-transform: uppercase;
+    letter-spacing: 0.05em;
+  }
+  
+  .text-caption {
+    font-size: 12px;
+    text-transform: uppercase;
+    letter-spacing: 0.1em;
+    font-weight: 500;
+  }
+  
+  .text-muted {
+    color: var(--color-foreground-muted);
+  }
+  
+  .text-subtle {
+    color: var(--color-foreground-subtle);
+  }
+  
+  .flex-center {
+    display: flex;
+    align-items: center;
+    justify-content: center;
   }
-}
-
-.container-narrow {
-  max-width: 1200px;
-}
-
-.container-wide {
-  max-width: 1600px;
-}
-
-/* Section spacing */
-.section {
-  padding-top: var(--space-4xl);
-  padding-bottom: var(--space-4xl);
-}
-
-.section-sm {
-  padding-top: var(--space-2xl);
-  padding-bottom: var(--space-2xl);
-}
-
-/* Flex utilities */
-.flex-center {
-  display: flex;
-  align-items: center;
-  justify-content: center;
 }
 
 /* ============================================
-   INTERACTIVE ELEMENTS
+   UTILITIES
    ============================================ */
 
-/* Button Base */
+@layer utilities {
-.btn {
+  .section {
-  display: inline-flex;
+    padding-top: 96px;
-  align-items: center;
+    padding-bottom: 96px;
-  justify-content: center;
+  }
-  padding: 14px 32px;
+  
-  font-size: 13px;
+  .section-sm {
-  font-weight: 500;
+    padding-top: 48px;
-  text-transform: uppercase;
+    padding-bottom: 48px;
-  letter-spacing: 0.05em;
+  }
-  border: none;
+  
-  cursor: pointer;
+  ::-webkit-scrollbar {
-  transition: all var(--transition-base);
+    width: 8px;
-}
+  }
-
+  
-.btn-primary {
+  ::-webkit-scrollbar-track {
-  background: var(--color-cta);
+    background: var(--color-background-alt);
-  color: var(--color-white);
+  }
-}
+  
-
+  ::-webkit-scrollbar-thumb {
-.btn-primary:hover {
+    background: var(--color-border-dark);
-  background: var(--color-cta-hover);
+    border-radius: 4px;
-}
+  }
-
+  
-.btn-secondary {
+  ::-webkit-scrollbar-thumb:hover {
-  background: transparent;
+    background: var(--color-foreground-muted);
-  color: var(--color-foreground);
+  }
-  border: 1px solid var(--color-border-dark);
+  
-}
+  .animate-fade-in {
-
+    animation: fadeIn var(--transition-slow) forwards;
-.btn-secondary:hover {
+  }
-  background: var(--color-foreground);
+  
-  color: var(--color-white);
+  .animate-slide-up {
-  border-color: var(--color-foreground);
+    animation: slideUp var(--transition-slow) forwards;
-}
+  }
-
+  
-/* Link underline animation */
+  .animate-slide-in-right {
-.link-underline {
+    animation: slideInRight var(--transition-slow) forwards;
-  position: relative;
+  }
-  text-decoration: none;
+  
-}
+  @keyframes fadeIn {
-
+    from { opacity: 0; }
-.link-underline::after {
+    to { opacity: 1; }
-  content: '';
+  }
-  position: absolute;
+  
-  bottom: -2px;
+  @keyframes slideUp {
-  left: 0;
+    from { opacity: 0; transform: translateY(20px); }
-  width: 0;
+    to { opacity: 1; transform: translateY(0); }
-  height: 1px;
+  }
-  background: currentColor;
+  
-  transition: width var(--transition-base);
+  @keyframes slideInRight {
-}
+    from { opacity: 0; transform: translateX(100%); }
-
+    to { opacity: 1; transform: translateX(0); }
-.link-underline:hover::after {
+  }
-  width: 100%;
+  
+  @keyframes marquee {
+    0% { transform: translateX(0); }
+    100% { transform: translateX(-50%); }
+  }
+  
+  .animate-marquee {
+    animation: marquee 25s linear infinite;
+  }
+  
+  .animate-marquee-slow {
+    animation: marquee 35s linear infinite;
+  }
+  
+  .sr-only {
+    position: absolute;
+    width: 1px;
+    height: 1px;
+    padding: 0;
+    margin: -1px;
+    overflow: hidden;
+    clip: rect(0, 0, 0, 0);
+    white-space: nowrap;
+    border-width: 0;
+  }
 }
 
 /* ============================================
-   FORM ELEMENTS
+   REDUCED MOTION
    ============================================ */
 
-input, textarea, select {
-  font-family: var(--font-body);
-  font-size: 16px;
-}
-
-input:focus, textarea:focus, select:focus {
-  outline: none;
-  border-color: var(--color-foreground);
-}
-
-/* ============================================
-   SCROLLBAR
-   ============================================ */
-
-::-webkit-scrollbar {
-  width: 8px;
-}
-
-::-webkit-scrollbar-track {
-  background: var(--color-background-alt);
-}
-
-::-webkit-scrollbar-thumb {
-  background: var(--color-border-dark);
-  border-radius: 4px;
-}
-
-::-webkit-scrollbar-thumb:hover {
-  background: var(--color-foreground-muted);
-}
-
-/* ============================================
-   ANIMATIONS
-   ============================================ */
-
-@keyframes fadeIn {
-  from {
-    opacity: 0;
-  }
-  to {
-    opacity: 1;
-  }
-}
-
-@keyframes slideUp {
-  from {
-    opacity: 0;
-    transform: translateY(20px);
-  }
-  to {
-    opacity: 1;
-    transform: translateY(0);
-  }
-}
-
-@keyframes slideInRight {
-  from {
-    opacity: 0;
-    transform: translateX(100%);
-  }
-  to {
-    opacity: 1;
-    transform: translateX(0);
-  }
-}
-
-.animate-fade-in {
-  animation: fadeIn var(--transition-slow) forwards;
-}
-
-.animate-slide-up {
-  animation: slideUp var(--transition-slow) forwards;
-}
-
-.animate-slide-in-right {
-  animation: slideInRight var(--transition-slow) forwards;
-}
-
-/* Marquee Animations */
-@keyframes marquee {
-  0% {
-    transform: translateX(0);
-  }
-  100% {
-    transform: translateX(-50%);
-  }
-}
-
-.animate-marquee {
-  animation: marquee 25s linear infinite;
-}
-
-.animate-marquee-slow {
-  animation: marquee 35s linear infinite;
-}
-
-/* ============================================
-   ACCESSIBILITY
-   ============================================ */
-
-/* Focus visible styles */
-:focus-visible {
-  outline: 2px solid var(--color-foreground);
-  outline-offset: 2px;
-}
-
-/* Reduced motion */
 @media (prefers-reduced-motion: reduce) {
   *,
   *::before,
@@ -412,16 +368,3 @@ input:focus, textarea:focus, select:focus {
     scroll-behavior: auto;
   }
 }
-
-/* Screen reader only */
-.sr-only {
-  position: absolute;
-  width: 1px;
-  height: 1px;
-  padding: 0;
-  margin: -1px;
-  overflow: hidden;
-  clip: rect(0, 0, 0, 0);
-  white-space: nowrap;
-  border-width: 0;
-}

src/app/page.tsx

@@ -162,15 +162,15 @@ export default async function Homepage() {
                   Subscribe to receive exclusive offers, beauty tips, and be the first to know about new products.
                 </p>
                 {/* Newsletter Form - Centered */}
-                <form className="flex flex-col sm:flex-row items-center justify-center w-full sm:w-auto gap-0">
+                <form className="flex flex-col sm:flex-row items-stretch justify-center max-w-md mx-auto gap-0">
                   <input
                     type="email"
                     placeholder="Enter your email"
-                    className="w-full sm:w-64 md:w-80 px-5 h-14 bg-white/10 border border-white/20 border-b-0 sm:border-b border-r-0 sm:border-r border-white/20 text-white placeholder:text-white/50 focus:border-white focus:outline-none transition-colors text-base text-center sm:text-left"
+                    className="flex-1 min-w-0 px-5 h-14 bg-white/10 border border-white/20 border-b-0 sm:border-b border-r-0 sm:border-r border-white/20 text-white placeholder:text-white/50 focus:border-white focus:outline-none transition-colors text-base text-center sm:text-left rounded-t sm:rounded-l sm:rounded-tr-none"
                   />
                   <button
                     type="submit"
-                    className="w-full sm:w-auto px-8 h-14 bg-white text-black text-sm uppercase tracking-[0.1em] font-medium hover:bg-white/90 transition-colors whitespace-nowrap flex-shrink-0"
+                    className="px-8 h-14 bg-white text-black text-sm uppercase tracking-[0.1em] font-medium hover:bg-white/90 transition-colors whitespace-nowrap flex-shrink-0 rounded-b sm:rounded-r sm:rounded-bl-none"
                   >
                     Subscribe
                   </button>

src/app/products/page.tsx

@@ -24,7 +24,7 @@ export default async function ProductsPage({ params }: ProductsPageProps) {
       
       <main className="min-h-screen bg-white">
         {/* Page Header */}
-        <div className="pt-[140px] lg:pt-[160px]">
+        <div className="pt-[72px] lg:pt-[72px]">
           <div className="border-b border-[#e5e5e5]">
             <div className="container py-8 md:py-12">
               <div className="flex flex-col md:flex-row md:items-end md:justify-between gap-4">

src/components/layout/Header.tsx

@@ -53,68 +53,66 @@ export default function Header() {
         className={`fixed top-0 left-0 right-0 z-50 transition-all duration-300 ${
           scrolled
             ? "bg-white/95 backdrop-blur-md shadow-sm"
-            : "bg-transparent"
+            : "bg-white/80 backdrop-blur-sm"
         }`}
       >
-        <div className="container">
+        <div className="relative flex items-center justify-between h-[72px]">
-          <div className="flex items-center justify-between h-[72px]">
+          {/* Mobile Menu Button */}
-            {/* Mobile Menu Button */}
+          <button
+            className="lg:hidden p-2 -ml-2 hover:bg-black/5 rounded-full transition-colors"
+            onClick={() => setMobileMenuOpen(true)}
+            aria-label="Open menu"
+          >
+            <Menu className="w-5 h-5" />
+          </button>
+
+          {/* Left side - Desktop Nav */}
+          <nav className="hidden lg:flex items-center gap-10">
+            {navLinks.map((link) => (
+              <Link
+                key={link.href}
+                href={link.href}
+                className="text-[13px] uppercase tracking-[0.05em] text-[#1a1a1a] hover:text-[#666666] transition-colors relative group"
+              >
+                {link.label}
+                <span className="absolute -bottom-1 left-0 w-0 h-[1px] bg-current transition-all duration-300 group-hover:w-full" />
+              </Link>
+            ))}
+          </nav>
+
+          {/* Logo - Centered (absolute on desktop, flex on mobile) */}
+          <Link href="/" className="flex-shrink-0 lg:absolute lg:left-1/2 lg:-translate-x-1/2">
+            <Image
+              src="https://minio-api.nodecrew.me/manoon-media/2024/09/cropped-manoon-logo_256x-1-1.png"
+              alt="ManoonOils"
+              width={150}
+              height={40}
+              className="h-7 w-auto object-contain"
+              priority
+            />
+          </Link>
+
+          {/* Right side - Icons */}
+          <div className="flex items-center gap-1">
             <button
-              className="lg:hidden p-2 -ml-2 hover:bg-black/5 rounded-full transition-colors"
+              className="p-2 hover:bg-black/5 rounded-full transition-colors hidden sm:block"
-              onClick={() => setMobileMenuOpen(true)}
+              aria-label="Account"
-              aria-label="Open menu"
             >
-              <Menu className="w-5 h-5" />
+              <User className="w-5 h-5" strokeWidth={1.5} />
             </button>
 
-            {/* Logo */}
+            <button
-            <Link href="/" className="flex-shrink-0 lg:absolute lg:left-1/2 lg:-translate-x-1/2">
+              className="p-2 hover:bg-black/5 rounded-full transition-colors relative"
-              <Image
+              onClick={toggleCart}
-                src="https://minio-api.nodecrew.me/manoon-media/2024/09/cropped-manoon-logo_256x-1-1.png"
+              aria-label="Open cart"
-                alt="ManoonOils"
+            >
-                width={150}
+              <ShoppingBag className="w-5 h-5" strokeWidth={1.5} />
-                height={40}
+              {itemCount > 0 && (
-                className="h-7 w-auto object-contain"
+                <span className="absolute -top-0.5 -right-0.5 bg-black text-white text-[10px] w-[18px] h-[18px] rounded-full flex items-center justify-center font-medium">
-                priority
+                  {itemCount > 99 ? "99+" : itemCount}
-              />
+                </span>
-            </Link>
+              )}
-
+            </button>
-            {/* Desktop Navigation - Centered */}
-            <nav className="hidden lg:flex items-center gap-10 mx-auto">
-              {navLinks.map((link) => (
-                <Link
-                  key={link.href}
-                  href={link.href}
-                  className="text-[13px] uppercase tracking-[0.05em] text-[#1a1a1a] hover:text-[#666666] transition-colors relative group"
-                >
-                  {link.label}
-                  <span className="absolute -bottom-1 left-0 w-0 h-[1px] bg-current transition-all duration-300 group-hover:w-full" />
-                </Link>
-              ))}
-            </nav>
-
-            {/* Icons */}
-            <div className="flex items-center gap-1">
-              <button
-                className="p-2 hover:bg-black/5 rounded-full transition-colors hidden sm:block"
-                aria-label="Account"
-              >
-                <User className="w-5 h-5" strokeWidth={1.5} />
-              </button>
-
-              <button
-                className="p-2 hover:bg-black/5 rounded-full transition-colors relative"
-                onClick={toggleCart}
-                aria-label="Open cart"
-              >
-                <ShoppingBag className="w-5 h-5" strokeWidth={1.5} />
-                {itemCount > 0 && (
-                  <span className="absolute -top-0.5 -right-0.5 bg-black text-white text-[10px] w-[18px] h-[18px] rounded-full flex items-center justify-center font-medium">
-                    {itemCount > 99 ? "99+" : itemCount}
-                  </span>
-                )}
-              </button>
-            </div>
           </div>
         </div>
       </header>