feat: refactor components to use slots, implement CSS-controlled SVG graphics, and enhance theming system

- Refactored InitialSection.astro to use named slot (extraContent) instead of prop for flexible HTML/JSX content injection from parent components
- Updated index.astro to utilize extraContent slot in InitialSection component
- Replaced decorative background div in Layout.astro with inline SVG element, enabling dynamic color control via CSS variable (--naliia-n-bg-color)
- Added .bg-svg class and --bg-svg-color variable in global.css for customizable SVG decorative background
- Converted navbar logo from img to inline SVG with CSS-controlled gradient using linearGradient definition
- Implemented gradient variables (--navbar-n-naliia-start, --navbar-n-naliia-end) for theme-aware logo coloring
- Configured vertical gradient (bottom-to-top) with pink color at bottom for navbar logo
- Added data-theme attribute support in Layout.astro for light/dark theme switching
- Extended global.css with comprehensive color palette (pink, yellow, mistyRose variants) and semantic tokens
- Refactored all color references to use CSS custom properties for consistent theming
- Updated Footer.astro logo from img to inline SVG with gradient support matching navbar implementation
- Replaced hardcoded color values in navbar.css and footer.css with semantic token variables
- Added [data-theme='dark'] selector in global.css to support future dark mode implementation
- Created reusable CSS variables for borders, backgrounds, and text colors across components
- Improved pricing card layout with enhanced visual hierarchy and gradient-based pricing tiers
- Restructured index.astro pricing section with improved feature presentation and layout

src/styles/index.css

@@ -32,7 +32,7 @@
 }
 
 .offer-card {
-    border: 1px solid rgba(255, 255, 255, 0.2);
+    border: var(--main-border);
     border-radius: var(--space-lg-24px);
 
     height: 200px;
@@ -65,74 +65,66 @@
 
 .pricing-cards-container {
     display: flex;
-    flex-direction: row;
+    flex-direction: column;
     justify-content: center;
     align-items: center;
     gap: var(--space-lg-24px);
 }
 
-.pricing-card {
-    border-radius: var(--space-lg-24px);
+.best-plan-card {
+    border-top-left-radius: var(--space-2xl-48px);
+    border-top-right-radius: var(--space-2xl-48px);
 
-    padding: var(--space-3xl-64px) var(--space-xl-32px);
+    display: flex;
+    align-items: center;
+    gap: var(--space-2xl-48px);
+    padding: var(--space-xl-32px);
+
+    height: 372px;
+    width: 100%;
+    box-shadow: 0px 4px 16px rgba(0, 0, 0, 0.1);
+    background-color: var(--pricingcard-bgcolor);
+    box-sizing: border-box;
+}
+
+.price-container {
+    height: 100%;
+    width: 50%;
 
     display: flex;
     flex-direction: column;
     justify-content: space-between;
-    gap: var(--space-2xl-48px);
+    border-top-left-radius: var(--space-2xl-48px);
 
-    min-height: 650px;
-    width: 380px;
-    box-shadow: 0px 4px 16px rgba(0, 0, 0, 0.1);
-    background-color: #363636;
-}
+    & .plan-type {
+        font-weight: bold;
+        background-color: var(--pricingcard-plantype-bgcolor);
+        color: var(--pricingcard-plantype-txtcolor);
+        padding: var(--space-sm-8px) var(--space-md-16px);
+        border-radius: var(--space-md-16px);
+        width: fit-content;
+        display: flex;
+        align-items: center;
+        justify-content: center;
+    }
 
-.pricing-card-content {
-    display: flex;
-    flex-direction: column;
-    gap: var(--space-2xl-48px);
-}
-
-.more-details {
-    font-size: var(--font-desktop-base);
-    line-height: var(--line-height-desktop-base);
-    color: white;
-    text-align: left;
-    cursor: pointer;
-    text-decoration: underline;
-}
-
-.best-plan-card {
-    border: 4px solid #e54c75;
-    height: 680px;
-}
-
-.pricing-card .plan-type {
-    font-weight: bold;
-    background-color: #e54c75;
-    padding: var(--space-sm-8px) var(--space-md-16px);
-    border-radius: var(--space-md-16px);
-    width: fit-content;
-    display: flex;
-    align-items: center;
-    justify-content: center;
+    & a {
+        color: var(--pricingcard-value-txtcolor);
+    }
 }
 
 .price-and-description {
     display: flex;
     flex-direction: column;
-    gap: var(--space-sm-8px);
-}
 
-.features-container {
-    display: flex;
-    flex-direction: column;
-    gap: var(--space-sm-8px);
+    & h4,
+    h6,
+    p {
+        color: var(--pricingcard-value-txtcolor);
+    }
 
-    && li {
-        color: white;
-        font-size: var(--font-desktop-base);
-        line-height: var(--line-height-desktop-base);
+    & .price-title {
+        text-decoration: underline;
     }
 }
 
@@ -163,8 +155,45 @@
     font-size: var(--font-desktop-sm);
     font-weight: normal;
     line-height: var(--line-height-desktop-sm);
-    color: white;
     text-align: center;
     cursor: pointer;
     text-decoration: underline;
 }
+
+.divider {
+    width: 1px;
+    height: 95%;
+    background-color: rgba(255, 255, 255, 0.2);
+}
+
+.features-container {
+    height: 100%;
+    width: 100%;
+
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-md-16px);
+
+    & .features-subtitle {
+        font-weight: bold;
+        font-size: var(--font-desktop-base);
+        color: var(--pricingcard-features-subtitlecolor);
+    }
+}
+
+.features-list {
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-md-16px);
+
+    & .basic-features,
+    .webapp-features,
+    .ai-features {
+        display: flex;
+        flex-direction: column;
+    }
+
+    & p {
+        color: var(--pricingcard-features-txtcolor);
+    }
+}