<button class="cyber-btn">
  <span class="cyber-btn__text">SİSTEMİ BAŞLAT</span>
  <span class="cyber-btn__glitch"></span>
</button>

<style>
    .cyber-btn {
  --primary-red: #ff0000;
  --dark-bg: #000000;
  
  position: relative;
  padding: 20px 40px;
  background: var(--dark-bg);
  color: #fff;
  font-family: 'Orbitron', sans-serif;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  border: 2px solid var(--primary-red);
  border-radius: 0;
  cursor: pointer;
  outline: none;
  transition: all 0.2s;
  
  clip-path: polygon(92% 0, 100% 25%, 100% 100%, 8% 100%, 0% 75%, 0 0);
  

  box-shadow: 8px 0px 0px 0px var(--primary-red);
}

.cyber-btn:hover {
  background: var(--primary-red);
  color: var(--dark-bg);
  box-shadow: -8px 0px 0px 0px #fff;
  transform: translateX(4px);
}

.cyber-btn:active {
  transform: scale(0.95);
  box-shadow: 0px 0px 0px 0px var(--primary-red);
}

.cyber-btn::after {
  content: 'R-24';
  position: absolute;
  bottom: 2px;
  right: 15px;
  font-size: 8px;
  color: var(--primary-red);
}

.cyber-btn:hover::after {
  color: var(--dark-bg);
}
</style>