* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #000;
  color: #ff4d00;
  font-family:
    Impact,
    Arial Black,
    sans-serif;
  overflow-x: hidden;
}

.marquee {
  width: 100%;
  overflow: hidden;
  border-bottom: 4px solid #ff4d00;
}

.marquee-track {
  display: inline-block;
  white-space: nowrap;
  font-size: 2rem;
  animation: scroll 7s linear infinite;
  padding: 10px 0;
}

@keyframes scroll {
  from {
    transform: translateX(300%);
  }
  to {
    transform: translateX(-100%);
  }
}

.container {
  max-width: 800px;
  margin: 60px auto;
  padding: 20px;
}

.title {
  font-size: 5rem;
  line-height: 0.9;
  text-transform: uppercase;
}

.title span {
  font-family:
    Impact,
    Arial Black,
    sans-serif;
  font-size: 5rem;
}

.input-group {
  margin: 40px 0;
  display: flex;
  gap: 10px;
}

input {
  flex: 1;
  padding: 15px;
  background: #000;
  border: 3px solid #ff4d00;
  color: #ff4d00;
  font-family: monospace;
  font-size: 1rem;
  outline: none;
}

input::placeholder {
  color: rgba(255, 77, 0, 0.5);
}

button {
  padding: 15px 25px;
  background: #ff4d00;
  color: #000;
  border: none;
  font-weight: bold;
  cursor: pointer;
  transition: transform 0.1s ease;
}

button:hover {
  transform: scale(1.1) rotate(-2deg);
}

ul {
  list-style: none;
}

li {
  text-transform: uppercase;
  padding: 15px;
  margin-bottom: 10px;
  border: 2px solid #ff4d00;
  display: flex;
  justify-content: center;
  text-align: center;
  align-items: center;
  letter-spacing: 1.5px;
  line-height: 1.4;
  font-size: 1.6rem;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

@keyframes moveParticles {
  from {
    transform: translate(0, 0);
  }
  to {
    transform: translate(-100px, -100px);
  }
}

.delete-btn {
  background: transparent;
  border: 2px solid #ff4d00;
  color: #ff4d00;
  padding: 5px 10px;
  cursor: pointer;
  position: absolute;
  right: 10px;
  transform-origin: center right;
}

.delete-btn:hover {
  background: #ff4d00;
  color: #000;
  position: absolute;
  right: 10px;
  z-index: 1;
  transform: scale(1.15);
}

.completed {
  color: #000;
  transform: scale(1.02);
  transition: transform 0.2s ease;
}
.completed .delete-btn {
  background: #000;
  color: #ff4d00;
  border-color: #000;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 200%;
  height: 200%;

  background-image:
    radial-gradient(#ff4d00 2px, transparent 2px),
    radial-gradient(#ff4d00 3px, transparent 3px);

  background-size:
    60px 60px,
    120px 120px;
  background-position:
    0 0,
    20px 20px;

  opacity: 0.5;

  animation: moveParticles 20s linear infinite;

  pointer-events: none;
  z-index: -1;
}

li::before {
  content: "CLICK IF TASK IS COMPLETED";
  position: absolute;
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%);

  font-family: monospace;
  font-size: 0.7rem;
  letter-spacing: 2px;

  color: #ff4d00;

  overflow: hidden;
  white-space: nowrap;
  border-right: 2px solid #ff4d00;

  width: 0;
  animation:
    typing 2s steps(30, end) forwards,
    blink 0.6s step-end infinite;

  z-index: 2;
}
li.completed::before {
  content: "TASK COMPLETED";
  color: #000;
  border-right: 2px solid #000;

  width: 0;
  animation:
    typing 1s steps(20, end) forwards,
    blink 0.6s step-end infinite;
}

li::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 200%;
  height: 200%;
  background: #ff4d00;

  transform: translate(-50%, -50%) scale(0);
  transform-origin: center;

  transition: transform 0.7s ease;

  z-index: 0;
}
li.completed::after {
  transform: translate(-50%, -50%) scale(1);
}

.completed::after {
  width: 200%;
  height: 200%;
  transform: translate(-50%, -50%) scale(1);
}

li > * {
  position: relative;
  z-index: 1;
}
@keyframes typing {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

@keyframes blink {
  50% {
    border-color: transparent;
  }
}