Ghost Dark Mode on Headline Theme

Moved to a new room, and the lighting is darker than usual. Working on my laptop made me realize… my blog was too bright! I love dark mode on my laptop, so why not on my blog too?

Some sites support it automatically, but my personal blog didn’t. So I asked ChatGPT to help me add dark mode. Now, users can read articles comfortably in darker environments, and I can switch themes anytime!

Note: Only affects code injection; safe, but backup Ghost files first at /var/lib/ghost.

Try It Out!

Click the 🌙 button at the bottom-right corner to toggle dark/light mode. ✨

Site Header (CSS Injection)

<style>
:root {
  --bg-color: #fefefe;
  --text-color: #222222;
  --heading-color: #333333;
  --code-bg: #f7f7f7;
  --code-text: #222222;
}

body.dark-mode {
  --bg-color: #1a1a1a;
  --text-color: #e5e5e5;
  --heading-color: #f5f5f5;
  --code-bg: #2a2a2a;
  --code-text: #e5e5e5;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: inherit;
  transition: color 0.3s ease;
}

body.dark-mode h1,
body.dark-mode h2,
body.dark-mode h3,
body.dark-mode h4,
body.dark-mode h5,
body.dark-mode h6,
body.dark-mode .gh-post-title {
  color: var(--heading-color) !important;
}

body.dark-mode .gh-author-name,
body.dark-mode .gh-author-name-list {
  color: #b0b0b0 !important;
}

body.dark-mode pre,
body.dark-mode code {
  background-color: var(--code-bg) !important;
  color: var(--code-text) !important;
}

body.dark-mode .language-python {
  color: var(--code-text) !important;
}

body.dark-mode .gh-head,
body.dark-mode .gh-outer {
  background-color: var(--bg-color) !important;
  color: var(--text-color) !important;
}

body.dark-mode .gh-head *,
body.dark-mode .gh-outer * {
  color: var(--text-color) !important;
}

body.dark-mode .gh-burger,
body.dark-mode .gh-nav-toggle {
  background-color: transparent !important;
}

body.dark-mode .gh-burger {
  background-color: transparent !important;
}

body.dark-mode .gh-burger::before,
body.dark-mode .gh-burger::after {
  background-color: var(--text-color) !important;
}

body.dark-mode .gh-head-actions .gh-search {
  color: var(--text-color) !important;
}

body.dark-mode .gh-head-actions .gh-search svg {
  stroke: var(--text-color) !important;
}
  
* {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

#darkModeToggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  padding: 0;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.2);
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 12px 30px rgba(0,0,0,0.25);
  color: #fff;
  font-size: 28px;
  cursor: pointer;
  z-index: 99999;
  overflow: visible;
  transition: all 0.25s ease;
}

#darkModeToggle:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 16px 35px rgba(0,0,0,0.35);
}

#darkModeToggle .ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ripple 0.6s ease-out;
  pointer-events: none;
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}
</style>

Site Footer (Button & Script Injection)

<button id="darkModeToggle">🌙</button>

<script>
  const toggleBtn = document.getElementById('darkModeToggle');
  const prefersDark = window.matchMedia('(prefers-color-scheme: dark)');

  function setTheme(mode) {
    if (mode === 'dark') {
      document.body.classList.add('dark-mode');
      toggleBtn.textContent = '☀️';
      localStorage.setItem('theme', 'dark');
    } else {
      document.body.classList.remove('dark-mode');
      toggleBtn.textContent = '🌙';
      localStorage.setItem('theme', 'light');
    }
  }

  const savedTheme = localStorage.getItem('theme');
  if (savedTheme) {
    setTheme(savedTheme);
  } else {
    setTheme(prefersDark.matches ? 'dark' : 'light');
  }

  toggleBtn.addEventListener('click', (e) => {
    const circle = document.createElement('span');
    circle.classList.add('ripple');

    const rect = toggleBtn.getBoundingClientRect();
    const size = Math.max(rect.width, rect.height);
    circle.style.width = circle.style.height = size + 'px';
    circle.style.left = (e.clientX - rect.left - size / 2) + 'px';
    circle.style.top = (e.clientY - rect.top - size / 2) + 'px';

    circle.style.backgroundColor = document.body.classList.contains('dark-mode')
      ? 'rgba(255,255,255,0.25)'
      : 'rgba(0,0,0,0.15)';

    toggleBtn.appendChild(circle);
    setTimeout(() => circle.remove(), 600);

    const isDark = document.body.classList.contains('dark-mode');
    setTheme(isDark ? 'light' : 'dark');
  });

  prefersDark.addEventListener('change', (e) => {
    if (!localStorage.getItem('theme')) {
      setTheme(e.matches ? 'dark' : 'light');
    }
  });
</script>

<script>
  window.addEventListener("load", function () {
    const nav = document.querySelector(".nav");

    setTimeout(() => {
      const dropdown = document.querySelector(".gh-dropdown");
      const more = document.querySelector(".nav-more-toggle");

      if (nav && dropdown) {
        dropdown.querySelectorAll("li").forEach(li => {
          nav.appendChild(li);
        });
        dropdown.remove();
      }

      if (more) more.remove();
    }, 100);
  });
</script>

Closing

That’s it! 🎉 Dark mode is now live on my blog. Whether you’re reading in a bright room or a dark one, you can switch themes anytime using the 🌙 / ☀️ button.