A total eclipse of this page
What you were looking for has slipped behind the Moon. It will be back, just not here.
Back to homeHTML + CSS404
Total eclipse 404
A 404 page where the zero is the Moon hiding the Sun, with a slow corona and a flashing diamond ring.
Settings
1x
Code
<!doctype html>
<html lang="es">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="robots" content="noindex" />
<title>404 · Page not found</title>
<style>
body { margin: 0; background: #000; }
.n4-eclipse {
--accent: #f5c77e;
--k: 1;
position: fixed;
inset: 0;
z-index: 0;
overflow: hidden;
container-type: size;
display: grid;
place-items: center;
background: #000;
color: #f5f5f7;
font-family: -apple-system,BlinkMacSystemFont,"SF Pro Display","Inter","Segoe UI",system-ui,sans-serif;
-webkit-font-smoothing: antialiased;
text-align: center;
line-height: 1.4;
}
.n4-eclipse *,.n4-eclipse *::before,.n4-eclipse *::after {
box-sizing: border-box;
}
.n4-eclipse .n4-copy {
position: relative;
z-index: 5;
display: flex;
flex-direction: column;
align-items: center;
gap: 1.6cqmin;
width: 100%;
max-width: 680px;
padding: 0 6cqw;
}
.n4-eclipse .n4-title {
margin: 0;
font-size: clamp(17px,4.2cqmin,36px);
font-weight: 600;
letter-spacing: -.02em;
line-height: 1.15;
text-wrap: balance;
}
.n4-eclipse .n4-sub {
margin: 0;
max-width: 34em;
font-size: clamp(13px,2.4cqmin,18px);
color: #a1a1a6;
text-wrap: balance;
}
.n4-eclipse .n4-tag {
font: 600 clamp(10px,1.9cqmin,13px)/1 ui-monospace,"SF Mono",Menlo,Consolas,monospace;
letter-spacing: .16em;
text-transform: uppercase;
color: var(--accent);
}
.n4-eclipse .n4-cta {
margin-top: 1.8cqmin;
display: inline-flex;
align-items: center;
gap: .5em;
padding: .85em 1.5em;
border-radius: 999px;
background: #f5f5f7;
color: #000;
font-size: clamp(13px,2.2cqmin,16px);
font-weight: 600;
text-decoration: none;
transition: transform .3s cubic-bezier(.25,.1,.25,1),box-shadow .3s cubic-bezier(.25,.1,.25,1);
}
.n4-eclipse .n4-cta:hover {
transform: translateY(-2px);
box-shadow: 0 12px 32px -10px var(--accent);
}
.n4-eclipse .n4-cta:focus-visible {
outline: 2px solid var(--accent);
outline-offset: 3px;
}
.n4-eclipse .n4-stars,.n4-eclipse .n4-stars2 {
position: absolute;
inset: -4%;
pointer-events: none;
}
.n4-eclipse .n4-stars {
background-image: radial-gradient(1px 1px at 8% 12%,#fff 60%,transparent),radial-gradient(1px 1px at 22% 68%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 35% 24%,#fff 60%,transparent),radial-gradient(1px 1px at 48% 82%,#fff 60%,transparent),radial-gradient(1px 1px at 57% 9%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 66% 44%,#fff 60%,transparent),radial-gradient(1px 1px at 74% 72%,#fff 60%,transparent),radial-gradient(1px 1px at 86% 18%,#fff 60%,transparent),radial-gradient(1.5px 1.5px at 93% 58%,#fff 60%,transparent),radial-gradient(1px 1px at 14% 42%,#fff 60%,transparent),radial-gradient(1px 1px at 40% 55%,#fff 60%,transparent),radial-gradient(1px 1px at 81% 90%,#fff 60%,transparent),radial-gradient(1px 1px at 4% 88%,#fff 60%,transparent),radial-gradient(1px 1px at 62% 30%,#fff 60%,transparent);
opacity: .75;
animation: n4-eclipse-tw calc(5s / var(--k)) ease-in-out infinite alternate;
}
.n4-eclipse .n4-stars2 {
background-image: radial-gradient(2px 2px at 18% 30%,rgba(255,255,255,.9) 50%,transparent),radial-gradient(1.5px 1.5px at 72% 20%,rgba(255,255,255,.8) 50%,transparent),radial-gradient(2px 2px at 30% 85%,rgba(255,255,255,.7) 50%,transparent),radial-gradient(1.5px 1.5px at 88% 70%,rgba(255,255,255,.8) 50%,transparent),radial-gradient(2px 2px at 52% 60%,rgba(255,255,255,.6) 50%,transparent),radial-gradient(1.5px 1.5px at 6% 55%,rgba(255,255,255,.8) 50%,transparent);
opacity: .55;
animation: n4-eclipse-tw calc(7s / var(--k)) ease-in-out infinite alternate-reverse;
}
.n4-eclipse [data-depth] {
transition: transform .9s cubic-bezier(.2,.7,.2,1);
}
@keyframes n4-eclipse-tw {
from {
opacity: .3;
}
}
@keyframes n4-eclipse-spin {
to {
transform: rotate(1turn);
}
}
@keyframes n4-eclipse-fade {
from {
opacity: 0;
transform: translateY(10px);
}
}
@media (prefers-reduced-motion:reduce) {
.n4-eclipse *,.n4-eclipse *::before,.n4-eclipse *::after {
animation: none!important;
transition: none!important;
}
}
.n4-eclipse {
background: radial-gradient(90% 70% at 50% 42%,#0d0c14,#000 70%);
}
.n4-eclipse .n4-num {
margin: 0 0 1cqmin;
display: flex;
align-items: center;
font-size: clamp(84px,30cqmin,300px);
font-weight: 700;
letter-spacing: -.05em;
line-height: .9;
}
.n4-eclipse .n4-num b {
background: linear-gradient(180deg,#fff 15%,#57575c 95%);
-webkit-background-clip: text;
background-clip: text;
color: transparent;
animation: n4-eclipse-rise calc(1.4s / var(--k)) cubic-bezier(.2,.7,.2,1) both;
}
.n4-eclipse .n4-num b:last-child {
animation-delay: calc(.15s / var(--k));
}
.n4-eclipse .n4-moon {
position: relative;
width: .7em;
height: .7em;
margin: 0 .06em;
border-radius: 50%;
background: radial-gradient(circle at 42% 38%,#121214,#000 60%);
box-shadow: 0 0 0 .006em rgba(255,255,255,.95),0 0 .04em .012em #fff,0 0 .14em .03em color-mix(in srgb,var(--accent) 80%,#fff),0 0 .5em .12em color-mix(in srgb,var(--accent) 40%,transparent),0 0 1.1em .35em color-mix(in srgb,var(--accent) 16%,transparent);
animation: n4-eclipse-glow calc(6s / var(--k)) ease-in-out infinite;
}
.n4-eclipse .n4-moon::before {
content: "";
position: absolute;
inset: -.22em;
border-radius: 50%;
background: conic-gradient(from 20deg,transparent 0 6%,color-mix(in srgb,var(--accent) 55%,#fff) 10%,transparent 18% 40%,rgba(255,255,255,.55) 47%,transparent 55% 72%,color-mix(in srgb,var(--accent) 45%,#fff) 80%,transparent 88%);
-webkit-mask: radial-gradient(circle,transparent 54%,#000 57%,transparent 76%);
mask: radial-gradient(circle,transparent 54%,#000 57%,transparent 76%);
filter: blur(.018em);
opacity: .9;
animation: n4-eclipse-spin calc(18s / var(--k)) linear infinite;
}
.n4-eclipse .n4-moon::after {
content: "";
position: absolute;
top: 9%;
right: 11%;
width: .05em;
height: .05em;
border-radius: 50%;
background: #fff;
box-shadow: 0 0 .05em .03em #fff,0 0 .22em .06em color-mix(in srgb,var(--accent) 70%,#fff);
animation: n4-eclipse-diamond calc(5s / var(--k)) ease-in-out infinite;
}
.n4-eclipse .n4-title,.n4-eclipse .n4-sub,.n4-eclipse .n4-cta {
animation: n4-eclipse-fade calc(1s / var(--k)) calc(.5s / var(--k)) cubic-bezier(.2,.7,.2,1) both;
}
@keyframes n4-eclipse-rise {
from {
opacity: 0;
transform: translateY(.12em);
filter: blur(.04em);
}
}
@keyframes n4-eclipse-glow {
50% {
filter: brightness(1.25);
}
}
@keyframes n4-eclipse-diamond {
0%,100% {
opacity: .2;
transform: scale(.5);
}
45%,55% {
opacity: 1;
transform: scale(1.6);
}
}
</style>
</head>
<body>
<main class="n4-eclipse">
<div class="n4-stars" aria-hidden="true"></div>
<div class="n4-copy">
<p class="n4-num" aria-hidden="true"><b>4</b><span class="n4-moon"></span><b>4</b></p>
<h1 class="n4-title">A total eclipse of this page</h1>
<p class="n4-sub">What you were looking for has slipped behind the Moon. It will be back, just not here.</p>
<a class="n4-cta" href="/">Back to home</a>
</div>
</main>
</body>
</html>
Prompt for AI
Paste it into ChatGPT, Claude or Cursor and it will adapt the block to your project with these settings, even if you don’t use React.
More in 404
Where to use it
Someone who lands on a broken link usually leaves within seconds. A custom 404 page with something worth looking at buys you those seconds, and the button sends people to your home page instead of out the door. This eclipse suits a photography studio, an architecture firm or any brand that likes dark, quiet visuals.
It is a complete page in HTML and CSS: upload the 404.html to your server and it works. Change the gold accent to your brand color first, then rewrite the title in your own voice. If your site is bright and playful, another design will fit better.