<div class="site-container">
  <div class="site-banner">
    A demo showing neon box-shadow in action
  </div>
  <header class="site-header">
    <div class="site-header-inner site-section-inner">
      <div class="site-branding">
        <h1 class="site-name">SiteName</h1>
      </div>
      <nav class="site-nav site-nav--main">
        <ul>
          <li><a href="">About</a></li>
          <li><a href="" class="active">Store</a></li>
          <li><a href="">Contact</a></li>
        </ul>
        <button class="btn neon-shadow-inset">

          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 -960 960 960" class="icon">
            <path d="M120-240v-80h720v80H120Zm0-200v-80h720v80H120Zm0-200v-80h720v80H120Z" />
          </svg>
          <span>Menu</span>
        </button>
      </nav>
    </div>

    <div class="site-hero">
      <div class="site-hero-inner site-section-inner">
        <h2>Bring Nature Home with Artful Elegance</h2>
        <p>Discover our unique, handcrafted flowerpots designed to add charm and character to every corner of your space.</p>
        <button class="btn btn--lg neon-shadow">
          <span>Know more</span>

          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 -960 960 960" class="icon">
            <path d="M647-440H160v-80h487L423-744l57-56 320 320-320 320-57-56 224-224Z" />
          </svg>

        </button>
      </div>
    </div>
  </header>

  <main class="site-main">
  <div class="site-main-inner site-section-inner">
    <div class="card-grid site-subsection">
      <div class="card">
        Simple card
      </div>
      <div class="card">
        Simple card
      </div>
      <div class="neon-shadow card card--new">
        Highlighted card
      </div>
      <div class="card">
        Simple card
      </div>
      <div class="card">
        Simple card
      </div>
      <div class="card">
        Simple card
      </div>
      <div class="neon-shadow card card--new">
        Highlighted card
      </div>
      <div class="card">
        Simple card
      </div>
      <div class="card">
        Simple card
      </div>
    </div>
    <div class="site-subsection">
    <button class="btn neon-shadow">Load more...</button>
    </div>
  </div>
  </main>
  <footer class="site-footer">
    <div class="site-footer-inner site-section-inner">
      This can be the site footer...
    </div>
  </footer>
</div>

@import url("https://fonts.googleapis.com/css2?family=Nunito&display=swap");

:root {
  --glow-hue: 340;

  /* Dark Variants */
  --color-pri-900: hsl(var(--glow-hue) 10% 5%);
  --color-pri-800: hsl(var(--glow-hue) 10% 10%);
  --color-pri-700: hsl(var(--glow-hue) 10% 20%);
  --color-pri-600: hsl(var(--glow-hue) 10% 25%);
  --color-pri-500: hsl(var(--glow-hue) 10% 30%);

  /* Light Variants */
  --color-sec-900: hsl(var(--glow-hue) 30% 95%);
  --color-sec-800: hsl(var(--glow-hue) 25% 85%);
  --color-sec-700: hsl(var(--glow-hue) 20% 75%);
  --color-sec-600: hsl(var(--glow-hue) 15% 65%);

  /* Accent Variants */
  --color-acc-900: hsl(var(--glow-hue) 70% 50%);
  --color-acc-800: hsl(var(--glow-hue) 70% 60%);
  --color-acc-700: hsl(var(--glow-hue) 70% 40%);

  /* Neutral Variants */
  --color-neu-900: hsl(var(--glow-hue) 10% 50%);
  --color-neu-800: hsl(var(--glow-hue) 10% 60%);

  /* Shadow & Neon Effects */
  --color-shadow-neon: 0 0 2px hsl(var(--glow-hue) 70% 50% / 20%),
    0 0 4px hsl(var(--glow-hue) 70% 50% / 25%),
    0 0 8px hsl(var(--glow-hue) 70% 50% / 30%);
  --color-shadow-neon-hover: 0 0 8px hsl(var(--glow-hue) 70% 70% / 20%),
    0 0 15px hsl(var(--glow-hue) 70% 70% / 25%),
    0 0 30px hsl(var(--glow-hue) 70% 70% / 30%);
  --color-shadow-neon-inset: 
    0 0 0 1px hsl(var(--glow-hue) 70% 50% / 30%),
    0 0 2px hsl(var(--glow-hue) 70% 50% / 25%),
    0 0 4px hsl(var(--glow-hue) 70% 50% / 20%),
    0 0 8px hsl(var(--glow-hue) 70% 50% / 30%),
    inset 0 0 2px hsl(var(--glow-hue) 70% 50% / 25%),
    inset 0 0 4px hsl(var(--glow-hue) 70% 50% / 20%),
    inset 0 0 8px hsl(var(--glow-hue) 70% 50% / 30%);
  --color-shadow-neon-inset-hover: 
    0 0 0 1px hsl(var(--glow-hue) 100% 100% / 30%),
    0 0 4px hsl(var(--glow-hue) 100% 70% / 25%),
    0 0 8px hsl(var(--glow-hue) 100% 70% / 20%),
    0 0 12px hsl(var(--glow-hue) 100% 70% / 30%),
    inset 0 0 4px hsl(var(--glow-hue) 100% 70% / 25%),
    inset 0 0 8px hsl(var(--glow-hue) 100% 70% / 20%),
    inset 0 0 12px hsl(var(--glow-hue) 100% 70% / 30%);
}

/* Utility Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Utility Classes */
.site-section-inner,
.site-main-inner {
  margin-inline: auto;
  max-width: 960px;
  padding-inline: 2rem;
}

.site-main-inner {
  padding-bottom: 4rem;
}

.site-subsection + .site-subsection {
  margin-top: 2rem;
}

/* Base Elements */
body {
  background: var(--color-pri-800);
  color: var(--color-sec-800);
  font-family: "Nunito", sans-serif;
  margin: 0;
}

a {
  color: var(--color-acc-900);
  text-decoration: none;
}

/* Grid Layout */
.card-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(3, 1fr);
}

.card {
  align-items: center;
  background-color: var(--color-pri-900);
  border-radius: 0.5em;
  color: hsl(var(--glow-hue) 10% 50% / 20%);
  display: flex;
  height: 200px;
  justify-content: center;
  width: 100%;
}

/* Navigation */
.site-nav ul {
  display: flex;
  gap: 1em;
  margin: 0;
  padding: 0;
}

.site-nav li {
  display: block;
  padding: 0;
}

.site-nav--main {
  align-items: center;
  display: flex;
  gap: 1.5em;
}

.site-nav--main a {
  color: currentcolor;
}

.site-nav--main a:hover,
.site-nav--main a.active {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.site-nav--main a.active {
  color: hsl(var(--glow-hue) 100% 60%);
}

/* Header & Banner */
.site-banner {
  background-color: var(--color-acc-900);
  color: var(--color-sec-900);
  padding: .5em 1em;
  text-align: center;
}

.site-header-inner {
  align-items: center;
  display: flex;
  justify-content: space-between;
  padding-block: 1em;
}

.site-name {
  color: var(--color-sec-700);
  font-size: 1.2em;
  margin: 0;
}

/* Hero Section */
.site-hero-inner {
  color: var(--color-sec-700);
  padding-block: 3em;
}

.site-hero-inner p {
  font-size: 1.2em;
  max-width: 30em;
}

.site-hero-inner p + .btn {
  margin-top: 1em;
}

.site-hero-inner h2 {
  color: var(--color-sec-900);
}

/* Card Variations */
.card--new {
  position: relative;
}

.card--new::after {
  background-color: hsl(var(--glow-hue) 100% 20%);
  color: hsl(var(--glow-hue) 100% 90%);
  content: "New";
  font-size: 0.75rem;
  line-height: 1;
  padding: 0.25rem 0.4rem;
  position: absolute;
  right: -1em;
  text-transform: uppercase;
  top: 1em;
}

/* Buttons */
.btn {
  align-items: center;
  background-color: var(--color-pri-900);
  border: 0;
  border-radius: .5rem;
  color: inherit;
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  gap: .5rem;
  justify-content: center;
  line-height: 1;
  padding: .75em 1em;
}

.btn--lg {
  font-size: 1.5rem;
  font-weight: bold;
  padding-inline: 1.5rem;
}

/* Effects & Hover States */
.neon-shadow {
  box-shadow: var(--color-shadow-neon);
  transition: all 0.3s ease;
}

.neon-shadow:hover {
  box-shadow: var(--color-shadow-neon-hover);
}

.neon-shadow-inset {
  box-shadow: var(--color-shadow-neon-inset);
  transition: all 0.3s ease;
}

.neon-shadow-inset:hover {
  box-shadow: var(--color-shadow-neon-inset-hover);
}

/* Footer */
.site-footer {
  background-color: var(--color-pri-900);
}

.site-footer-inner {
  padding-block: 2rem;
}

/* Icons */
.icon {
  fill: currentColor;
  width: 1.5rem;
}