# Clinic 404

> A heart monitor line crosses the screen, beats twice, draws a huge 404 and then goes flat.

- Category: [404](https://library.aimran.es/components/404)
- Built with: HTML + CSS
- Live editor: https://library.aimran.es/blocks/404-clinic
- Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham

## Where to use it

Clinic websites collect dead links fast: the profile of a doctor who left, an old booking form, a leaflet about last winter’s flu jabs. Patients who land there are often a bit worried already. A calm, well made 404 page for a medical clinic keeps them on your site and sends them back to reception in one click.

The “no pulse” joke works for a dental practice, a physio or a private clinic with a friendly tone. For oncology or a hospital, rewrite the title in something plainer. Adding the appointment phone to the message is often the most useful change.

## Code

### HTML

```html
<!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-clinic {
        --accent: #2dd4bf;
        --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-clinic *,.n4-clinic *::before,.n4-clinic *::after {
        box-sizing: border-box;
      }
      
      .n4-clinic .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-clinic .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-clinic .n4-sub {
        margin: 0;
        max-width: 34em;
        font-size: clamp(13px,2.4cqmin,18px);
        color: #a1a1a6;
        text-wrap: balance;
      }
      
      .n4-clinic .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-clinic .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-clinic .n4-cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 32px -10px var(--accent);
      }
      
      .n4-clinic .n4-cta:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 3px;
      }
      
      .n4-clinic .n4-stars,.n4-clinic .n4-stars2 {
        position: absolute;
        inset: -4%;
        pointer-events: none;
      }
      
      .n4-clinic .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-clinic-tw calc(5s / var(--k)) ease-in-out infinite alternate;
      }
      
      .n4-clinic .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-clinic-tw calc(7s / var(--k)) ease-in-out infinite alternate-reverse;
      }
      
      .n4-clinic [data-depth] {
        transition: transform .9s cubic-bezier(.2,.7,.2,1);
      }
      
      @keyframes n4-clinic-tw {
        from {
          opacity: .3;
        }
      }
      
      @keyframes n4-clinic-spin {
        to {
          transform: rotate(1turn);
        }
      }
      
      @keyframes n4-clinic-fade {
        from {
          opacity: 0;
          transform: translateY(10px);
        }
      }
      
      @media (prefers-reduced-motion:reduce) {
        .n4-clinic *,.n4-clinic *::before,.n4-clinic *::after {
          animation: none!important;
          transition: none!important;
        }
      }
      
      .n4-clinic {
        background: radial-gradient(80% 60% at 50% 38%,#07302b,#021210 70%,#010807);
        color: #eafffb;
      }
      
      .n4-clinic::before {
        content: "";
        position: absolute;
        inset: 0;
        background-image: linear-gradient(color-mix(in srgb,var(--accent) 7%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--accent) 7%,transparent) 1px,transparent 1px);
        background-size: 5cqmin 5cqmin;
        -webkit-mask: radial-gradient(circle at 50% 38%,#000 5%,transparent 70%);
        mask: radial-gradient(circle at 50% 38%,#000 5%,transparent 70%);
      }
      
      .n4-clinic .n4-copy {
        min-width: 0;
      }
      
      .n4-clinic .n4-ecg {
        flex: none;
        display: block;
        width: max(100cqw,min(196cqmin,1300px));
        height: auto;
        margin-bottom: 1cqmin;
        overflow: visible;
        animation: n4-clinic-in calc(1s / var(--k)) ease-out both;
      }
      
      .n4-clinic .n4-ecg path {
        fill: none;
        stroke-linecap: round;
        stroke-linejoin: round;
      }
      
      .n4-clinic .n4-base {
        stroke: color-mix(in srgb,var(--accent) 38%,transparent);
        stroke-width: 3.5;
      }
      
      .n4-clinic .n4-trail {
        stroke: color-mix(in srgb,var(--accent) 70%,#fff);
        stroke-width: 4.5;
        filter: drop-shadow(0 0 4px var(--accent)) drop-shadow(0 0 12px color-mix(in srgb,var(--accent) 60%,transparent));
        animation: n4-clinic-trail calc(5s / var(--k)) linear infinite;
      }
      
      .n4-clinic .n4-beam {
        stroke: #fff;
        stroke-width: 7;
        filter: drop-shadow(0 0 4px #fff) drop-shadow(0 0 14px var(--accent));
        animation: n4-clinic-beam calc(5s / var(--k)) linear infinite;
      }
      
      .n4-clinic .n4-title {
        font-size: clamp(22px,5.6cqmin,48px);
        font-weight: 700;
        letter-spacing: -.03em;
      }
      
      .n4-clinic .n4-sub {
        color: #8fb3ad;
      }
      
      .n4-clinic .n4-cta {
        background: var(--accent);
        color: #021210;
      }
      
      .n4-clinic .n4-copy>:not(.n4-ecg) {
        animation: n4-clinic-fade calc(1s / var(--k)) calc(.4s / var(--k)) cubic-bezier(.2,.7,.2,1) both;
      }
      
      @keyframes n4-clinic-in {
        from {
          opacity: 0;
        }
      }
      
      @keyframes n4-clinic-trail {
        from {
          stroke-dasharray: 180 3000;
          stroke-dashoffset: 180;
        }
        to {
          stroke-dasharray: 180 3000;
          stroke-dashoffset: -1000;
        }
      }
      
      @keyframes n4-clinic-beam {
        from {
          stroke-dasharray: 1 3000;
          stroke-dashoffset: 1;
        }
        to {
          stroke-dasharray: 1 3000;
          stroke-dashoffset: -1000;
        }
      }
    </style>
  </head>
  <body>
    <main class="n4-clinic">
      <div class="n4-copy">
        <svg class="n4-ecg" viewBox="0 0 1200 300" aria-hidden="true">
          <path class="n4-base" d="M0 150 H40 q10 -16 20 0 H86 l6 10 l9 -126 l10 150 l7 -34 H150 q18 -30 36 0 H232 q10 -16 20 0 H278 l6 10 l9 -126 l10 150 l7 -34 H342 q16 -26 32 0 H414 L484 40 V260 V150 H556 V100 C556 26 652 26 652 100 V200 C652 274 556 274 556 200 V150 V200 C556 274 652 274 652 200 V150 H716 L786 40 V260 V150 H1200"/>
          <path class="n4-trail" pathLength="1000" d="M0 150 H40 q10 -16 20 0 H86 l6 10 l9 -126 l10 150 l7 -34 H150 q18 -30 36 0 H232 q10 -16 20 0 H278 l6 10 l9 -126 l10 150 l7 -34 H342 q16 -26 32 0 H414 L484 40 V260 V150 H556 V100 C556 26 652 26 652 100 V200 C652 274 556 274 556 200 V150 V200 C556 274 652 274 652 200 V150 H716 L786 40 V260 V150 H1200"/>
          <path class="n4-beam" pathLength="1000" d="M0 150 H40 q10 -16 20 0 H86 l6 10 l9 -126 l10 150 l7 -34 H150 q18 -30 36 0 H232 q10 -16 20 0 H278 l6 10 l9 -126 l10 150 l7 -34 H342 q16 -26 32 0 H414 L484 40 V260 V150 H556 V100 C556 26 652 26 652 100 V200 C652 274 556 274 556 200 V150 V200 C556 274 652 274 652 200 V150 H716 L786 40 V260 V150 H1200"/>
        </svg>
        <span class="n4-tag">ER · Diagnosis 404</span>
        <h1 class="n4-title">This page has no pulse.</h1>
        <p class="n4-sub">We ran every test and there’s nothing more we can do. You, on the other hand, are doing great.</p>
        <a class="n4-cta" href="/">Back to reception</a>
      </div>
    </main>
  </body>
</html>
```

### CSS

```css
.n4-clinic {
  --accent: #2dd4bf;
  --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-clinic *,.n4-clinic *::before,.n4-clinic *::after {
  box-sizing: border-box;
}

.n4-clinic .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-clinic .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-clinic .n4-sub {
  margin: 0;
  max-width: 34em;
  font-size: clamp(13px,2.4cqmin,18px);
  color: #a1a1a6;
  text-wrap: balance;
}

.n4-clinic .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-clinic .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-clinic .n4-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -10px var(--accent);
}

.n4-clinic .n4-cta:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.n4-clinic .n4-stars,.n4-clinic .n4-stars2 {
  position: absolute;
  inset: -4%;
  pointer-events: none;
}

.n4-clinic .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-clinic-tw calc(5s / var(--k)) ease-in-out infinite alternate;
}

.n4-clinic .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-clinic-tw calc(7s / var(--k)) ease-in-out infinite alternate-reverse;
}

.n4-clinic [data-depth] {
  transition: transform .9s cubic-bezier(.2,.7,.2,1);
}

@keyframes n4-clinic-tw {
  from {
    opacity: .3;
  }
}

@keyframes n4-clinic-spin {
  to {
    transform: rotate(1turn);
  }
}

@keyframes n4-clinic-fade {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
}

@media (prefers-reduced-motion:reduce) {
  .n4-clinic *,.n4-clinic *::before,.n4-clinic *::after {
    animation: none!important;
    transition: none!important;
  }
}

.n4-clinic {
  background: radial-gradient(80% 60% at 50% 38%,#07302b,#021210 70%,#010807);
  color: #eafffb;
}

.n4-clinic::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(color-mix(in srgb,var(--accent) 7%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--accent) 7%,transparent) 1px,transparent 1px);
  background-size: 5cqmin 5cqmin;
  -webkit-mask: radial-gradient(circle at 50% 38%,#000 5%,transparent 70%);
  mask: radial-gradient(circle at 50% 38%,#000 5%,transparent 70%);
}

.n4-clinic .n4-copy {
  min-width: 0;
}

.n4-clinic .n4-ecg {
  flex: none;
  display: block;
  width: max(100cqw,min(196cqmin,1300px));
  height: auto;
  margin-bottom: 1cqmin;
  overflow: visible;
  animation: n4-clinic-in calc(1s / var(--k)) ease-out both;
}

.n4-clinic .n4-ecg path {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.n4-clinic .n4-base {
  stroke: color-mix(in srgb,var(--accent) 38%,transparent);
  stroke-width: 3.5;
}

.n4-clinic .n4-trail {
  stroke: color-mix(in srgb,var(--accent) 70%,#fff);
  stroke-width: 4.5;
  filter: drop-shadow(0 0 4px var(--accent)) drop-shadow(0 0 12px color-mix(in srgb,var(--accent) 60%,transparent));
  animation: n4-clinic-trail calc(5s / var(--k)) linear infinite;
}

.n4-clinic .n4-beam {
  stroke: #fff;
  stroke-width: 7;
  filter: drop-shadow(0 0 4px #fff) drop-shadow(0 0 14px var(--accent));
  animation: n4-clinic-beam calc(5s / var(--k)) linear infinite;
}

.n4-clinic .n4-title {
  font-size: clamp(22px,5.6cqmin,48px);
  font-weight: 700;
  letter-spacing: -.03em;
}

.n4-clinic .n4-sub {
  color: #8fb3ad;
}

.n4-clinic .n4-cta {
  background: var(--accent);
  color: #021210;
}

.n4-clinic .n4-copy>:not(.n4-ecg) {
  animation: n4-clinic-fade calc(1s / var(--k)) calc(.4s / var(--k)) cubic-bezier(.2,.7,.2,1) both;
}

@keyframes n4-clinic-in {
  from {
    opacity: 0;
  }
}

@keyframes n4-clinic-trail {
  from {
    stroke-dasharray: 180 3000;
    stroke-dashoffset: 180;
  }
  to {
    stroke-dasharray: 180 3000;
    stroke-dashoffset: -1000;
  }
}

@keyframes n4-clinic-beam {
  from {
    stroke-dasharray: 1 3000;
    stroke-dashoffset: 1;
  }
  to {
    stroke-dasharray: 1 3000;
    stroke-dashoffset: -1000;
  }
}
```

### React

```tsx
const css = `
.n4-clinic {
  --accent: #2dd4bf;
  --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-clinic *,.n4-clinic *::before,.n4-clinic *::after {
  box-sizing: border-box;
}

.n4-clinic .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-clinic .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-clinic .n4-sub {
  margin: 0;
  max-width: 34em;
  font-size: clamp(13px,2.4cqmin,18px);
  color: #a1a1a6;
  text-wrap: balance;
}

.n4-clinic .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-clinic .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-clinic .n4-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -10px var(--accent);
}

.n4-clinic .n4-cta:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.n4-clinic .n4-stars,.n4-clinic .n4-stars2 {
  position: absolute;
  inset: -4%;
  pointer-events: none;
}

.n4-clinic .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-clinic-tw calc(5s / var(--k)) ease-in-out infinite alternate;
}

.n4-clinic .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-clinic-tw calc(7s / var(--k)) ease-in-out infinite alternate-reverse;
}

.n4-clinic [data-depth] {
  transition: transform .9s cubic-bezier(.2,.7,.2,1);
}

@keyframes n4-clinic-tw {
  from {
    opacity: .3;
  }
}

@keyframes n4-clinic-spin {
  to {
    transform: rotate(1turn);
  }
}

@keyframes n4-clinic-fade {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
}

@media (prefers-reduced-motion:reduce) {
  .n4-clinic *,.n4-clinic *::before,.n4-clinic *::after {
    animation: none!important;
    transition: none!important;
  }
}

.n4-clinic {
  background: radial-gradient(80% 60% at 50% 38%,#07302b,#021210 70%,#010807);
  color: #eafffb;
}

.n4-clinic::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(color-mix(in srgb,var(--accent) 7%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--accent) 7%,transparent) 1px,transparent 1px);
  background-size: 5cqmin 5cqmin;
  -webkit-mask: radial-gradient(circle at 50% 38%,#000 5%,transparent 70%);
  mask: radial-gradient(circle at 50% 38%,#000 5%,transparent 70%);
}

.n4-clinic .n4-copy {
  min-width: 0;
}

.n4-clinic .n4-ecg {
  flex: none;
  display: block;
  width: max(100cqw,min(196cqmin,1300px));
  height: auto;
  margin-bottom: 1cqmin;
  overflow: visible;
  animation: n4-clinic-in calc(1s / var(--k)) ease-out both;
}

.n4-clinic .n4-ecg path {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.n4-clinic .n4-base {
  stroke: color-mix(in srgb,var(--accent) 38%,transparent);
  stroke-width: 3.5;
}

.n4-clinic .n4-trail {
  stroke: color-mix(in srgb,var(--accent) 70%,#fff);
  stroke-width: 4.5;
  filter: drop-shadow(0 0 4px var(--accent)) drop-shadow(0 0 12px color-mix(in srgb,var(--accent) 60%,transparent));
  animation: n4-clinic-trail calc(5s / var(--k)) linear infinite;
}

.n4-clinic .n4-beam {
  stroke: #fff;
  stroke-width: 7;
  filter: drop-shadow(0 0 4px #fff) drop-shadow(0 0 14px var(--accent));
  animation: n4-clinic-beam calc(5s / var(--k)) linear infinite;
}

.n4-clinic .n4-title {
  font-size: clamp(22px,5.6cqmin,48px);
  font-weight: 700;
  letter-spacing: -.03em;
}

.n4-clinic .n4-sub {
  color: #8fb3ad;
}

.n4-clinic .n4-cta {
  background: var(--accent);
  color: #021210;
}

.n4-clinic .n4-copy>:not(.n4-ecg) {
  animation: n4-clinic-fade calc(1s / var(--k)) calc(.4s / var(--k)) cubic-bezier(.2,.7,.2,1) both;
}

@keyframes n4-clinic-in {
  from {
    opacity: 0;
  }
}

@keyframes n4-clinic-trail {
  from {
    stroke-dasharray: 180 3000;
    stroke-dashoffset: 180;
  }
  to {
    stroke-dasharray: 180 3000;
    stroke-dashoffset: -1000;
  }
}

@keyframes n4-clinic-beam {
  from {
    stroke-dasharray: 1 3000;
    stroke-dashoffset: 1;
  }
  to {
    stroke-dasharray: 1 3000;
    stroke-dashoffset: -1000;
  }
}
`;

export default function NotFoundClinic() {
  return (
    <>
      <style>{css}</style>
      <div>
        <main className="n4-clinic">
          <div className="n4-copy">
            <svg className="n4-ecg" viewBox="0 0 1200 300" aria-hidden="true">
              <path className="n4-base" d="M0 150 H40 q10 -16 20 0 H86 l6 10 l9 -126 l10 150 l7 -34 H150 q18 -30 36 0 H232 q10 -16 20 0 H278 l6 10 l9 -126 l10 150 l7 -34 H342 q16 -26 32 0 H414 L484 40 V260 V150 H556 V100 C556 26 652 26 652 100 V200 C652 274 556 274 556 200 V150 V200 C556 274 652 274 652 200 V150 H716 L786 40 V260 V150 H1200" />
              <path className="n4-trail" pathLength="1000" d="M0 150 H40 q10 -16 20 0 H86 l6 10 l9 -126 l10 150 l7 -34 H150 q18 -30 36 0 H232 q10 -16 20 0 H278 l6 10 l9 -126 l10 150 l7 -34 H342 q16 -26 32 0 H414 L484 40 V260 V150 H556 V100 C556 26 652 26 652 100 V200 C652 274 556 274 556 200 V150 V200 C556 274 652 274 652 200 V150 H716 L786 40 V260 V150 H1200" />
              <path className="n4-beam" pathLength="1000" d="M0 150 H40 q10 -16 20 0 H86 l6 10 l9 -126 l10 150 l7 -34 H150 q18 -30 36 0 H232 q10 -16 20 0 H278 l6 10 l9 -126 l10 150 l7 -34 H342 q16 -26 32 0 H414 L484 40 V260 V150 H556 V100 C556 26 652 26 652 100 V200 C652 274 556 274 556 200 V150 V200 C556 274 652 274 652 200 V150 H716 L786 40 V260 V150 H1200" />
            </svg>
            <span className="n4-tag">ER · Diagnosis 404</span>
            <h1 className="n4-title">This page has no pulse.</h1>
            <p className="n4-sub">We ran every test and there’s nothing more we can do. You, on the other hand, are doing great.</p>
            <a className="n4-cta" href="/">Back to reception</a>
          </div>
        </main>
      </div>
    </>
  );
}
```

## Prompt for AI assistants

Paste this into ChatGPT, Claude, Cursor, v0 or Lovable to adapt the block to your stack (Tailwind, Vue, Svelte…):

````text
I want to add the “Clinic 404” block (404) from AIMRAN Library to my project.

## What it is
A heart monitor line crosses the screen, beats twice, draws a huge 404 and then goes flat.

## Chosen settings
- Accent color: #2dd4bf
- Speed: 1x (from 0.5 to 2x)
- Title: "This page has no pulse."
- Message: "We ran every test and there’s nothing more we can do. You, on the other hand, are doing great."
- Button: "Back to reception"

## What I need
1. Add it to my project with the same look and animation as the reference code: same sizes, colours, radii, shadows, timings and easing.
2. It is built with plain HTML and CSS (the reference wraps it in a React component with its CSS). If my project uses something else (Vue, Svelte, Astro, plain HTML…), translate it without losing any behaviour. If I use Tailwind, turn the styles into classes; if not, keep the CSS in its own file.
3. Expose the settings above as props (or CSS variables) with those values as defaults.
4. Make it work well on phones: nothing that depends only on hover, touch targets of at least 44 px and no overflow on 320 px screens.
5. Make it look right in light and dark mode.
6. Keep it accessible: semantic HTML, roles and aria-* where needed, visible focus and keyboard support.
7. Respect prefers-reduced-motion: with reduced motion, no big animations but the same end result.

## Reference code
```tsx
const css = `
.n4-clinic {
  --accent: #2dd4bf;
  --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-clinic *,.n4-clinic *::before,.n4-clinic *::after {
  box-sizing: border-box;
}

.n4-clinic .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-clinic .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-clinic .n4-sub {
  margin: 0;
  max-width: 34em;
  font-size: clamp(13px,2.4cqmin,18px);
  color: #a1a1a6;
  text-wrap: balance;
}

.n4-clinic .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-clinic .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-clinic .n4-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -10px var(--accent);
}

.n4-clinic .n4-cta:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.n4-clinic .n4-stars,.n4-clinic .n4-stars2 {
  position: absolute;
  inset: -4%;
  pointer-events: none;
}

.n4-clinic .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-clinic-tw calc(5s / var(--k)) ease-in-out infinite alternate;
}

.n4-clinic .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-clinic-tw calc(7s / var(--k)) ease-in-out infinite alternate-reverse;
}

.n4-clinic [data-depth] {
  transition: transform .9s cubic-bezier(.2,.7,.2,1);
}

@keyframes n4-clinic-tw {
  from {
    opacity: .3;
  }
}

@keyframes n4-clinic-spin {
  to {
    transform: rotate(1turn);
  }
}

@keyframes n4-clinic-fade {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
}

@media (prefers-reduced-motion:reduce) {
  .n4-clinic *,.n4-clinic *::before,.n4-clinic *::after {
    animation: none!important;
    transition: none!important;
  }
}

.n4-clinic {
  background: radial-gradient(80% 60% at 50% 38%,#07302b,#021210 70%,#010807);
  color: #eafffb;
}

.n4-clinic::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(color-mix(in srgb,var(--accent) 7%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--accent) 7%,transparent) 1px,transparent 1px);
  background-size: 5cqmin 5cqmin;
  -webkit-mask: radial-gradient(circle at 50% 38%,#000 5%,transparent 70%);
  mask: radial-gradient(circle at 50% 38%,#000 5%,transparent 70%);
}

.n4-clinic .n4-copy {
  min-width: 0;
}

.n4-clinic .n4-ecg {
  flex: none;
  display: block;
  width: max(100cqw,min(196cqmin,1300px));
  height: auto;
  margin-bottom: 1cqmin;
  overflow: visible;
  animation: n4-clinic-in calc(1s / var(--k)) ease-out both;
}

.n4-clinic .n4-ecg path {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.n4-clinic .n4-base {
  stroke: color-mix(in srgb,var(--accent) 38%,transparent);
  stroke-width: 3.5;
}

.n4-clinic .n4-trail {
  stroke: color-mix(in srgb,var(--accent) 70%,#fff);
  stroke-width: 4.5;
  filter: drop-shadow(0 0 4px var(--accent)) drop-shadow(0 0 12px color-mix(in srgb,var(--accent) 60%,transparent));
  animation: n4-clinic-trail calc(5s / var(--k)) linear infinite;
}

.n4-clinic .n4-beam {
  stroke: #fff;
  stroke-width: 7;
  filter: drop-shadow(0 0 4px #fff) drop-shadow(0 0 14px var(--accent));
  animation: n4-clinic-beam calc(5s / var(--k)) linear infinite;
}

.n4-clinic .n4-title {
  font-size: clamp(22px,5.6cqmin,48px);
  font-weight: 700;
  letter-spacing: -.03em;
}

.n4-clinic .n4-sub {
  color: #8fb3ad;
}

.n4-clinic .n4-cta {
  background: var(--accent);
  color: #021210;
}

.n4-clinic .n4-copy>:not(.n4-ecg) {
  animation: n4-clinic-fade calc(1s / var(--k)) calc(.4s / var(--k)) cubic-bezier(.2,.7,.2,1) both;
}

@keyframes n4-clinic-in {
  from {
    opacity: 0;
  }
}

@keyframes n4-clinic-trail {
  from {
    stroke-dasharray: 180 3000;
    stroke-dashoffset: 180;
  }
  to {
    stroke-dasharray: 180 3000;
    stroke-dashoffset: -1000;
  }
}

@keyframes n4-clinic-beam {
  from {
    stroke-dasharray: 1 3000;
    stroke-dashoffset: 1;
  }
  to {
    stroke-dasharray: 1 3000;
    stroke-dashoffset: -1000;
  }
}
`;

export default function NotFoundClinic() {
  return (
    <>
      <style>{css}</style>
      <div>
        <main className="n4-clinic">
          <div className="n4-copy">
            <svg className="n4-ecg" viewBox="0 0 1200 300" aria-hidden="true">
              <path className="n4-base" d="M0 150 H40 q10 -16 20 0 H86 l6 10 l9 -126 l10 150 l7 -34 H150 q18 -30 36 0 H232 q10 -16 20 0 H278 l6 10 l9 -126 l10 150 l7 -34 H342 q16 -26 32 0 H414 L484 40 V260 V150 H556 V100 C556 26 652 26 652 100 V200 C652 274 556 274 556 200 V150 V200 C556 274 652 274 652 200 V150 H716 L786 40 V260 V150 H1200" />
              <path className="n4-trail" pathLength="1000" d="M0 150 H40 q10 -16 20 0 H86 l6 10 l9 -126 l10 150 l7 -34 H150 q18 -30 36 0 H232 q10 -16 20 0 H278 l6 10 l9 -126 l10 150 l7 -34 H342 q16 -26 32 0 H414 L484 40 V260 V150 H556 V100 C556 26 652 26 652 100 V200 C652 274 556 274 556 200 V150 V200 C556 274 652 274 652 200 V150 H716 L786 40 V260 V150 H1200" />
              <path className="n4-beam" pathLength="1000" d="M0 150 H40 q10 -16 20 0 H86 l6 10 l9 -126 l10 150 l7 -34 H150 q18 -30 36 0 H232 q10 -16 20 0 H278 l6 10 l9 -126 l10 150 l7 -34 H342 q16 -26 32 0 H414 L484 40 V260 V150 H556 V100 C556 26 652 26 652 100 V200 C652 274 556 274 556 200 V150 V200 C556 274 652 274 652 200 V150 H716 L786 40 V260 V150 H1200" />
            </svg>
            <span className="n4-tag">ER · Diagnosis 404</span>
            <h1 className="n4-title">This page has no pulse.</h1>
            <p className="n4-sub">We ran every test and there’s nothing more we can do. You, on the other hand, are doing great.</p>
            <a className="n4-cta" href="/">Back to reception</a>
          </div>
        </main>
      </div>
    </>
  );
}
```

Give me the complete final code, ready to paste, and tell me in one line where to put it in my project.
````
