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

body {
  font-family: 'Segoe UI', sans-serif;
  background: #f9f9f9;
  color: #333;
  line-height: 1.6;
}

/* Header */
header {
  background: linear-gradient(to right, black);
  padding: 20px;
  text-align: center;
}

.logo {
  color: red;
  font-size: 28px;
  font-weight: bold;
}

/* Container */
.container {
  max-width: 600px;
  margin: 30px auto;
  padding: 20px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  text-align: center;
}

input[type="number"] {
  width: 90%;
  padding: 12px;
  font-size: 16px;
  margin-bottom: 20px;
  border: 2px solid #ccc;
  border-radius: 10px;
  outline: none;
}

/* Quick Buttons */
.quick-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 20px;
}

.quick {
  flex: 1 1 100px;
  padding: 10px 15px;
  background: #eee;
  border: none;
  border-radius: 10px;
  font-weight: bold;
  cursor: pointer;
  transition: 0.3s;
  animation: fadeInScale 0.6s ease-in-out;
}

.quick:hover {
  background-color: #d90000;
  color: white;
}

.quick:active {
  animation: buttonClick 0.2s ease;
  transform: scale(0.95);
}

/* Submit Button */
.submit-btn {
  width: 40%;
  padding: 14px;
  background-color: red;
  color: white;
  font-weight: bold;
  font-size: 16px;
  border: none;
  border-radius: 30px;
  cursor: pointer;
  margin-bottom: 30px;
}

.submit-btn:hover {
  background: #cc0000;
}

/* Payment Methods */
.payment-methods h3 {
  margin: 30px 0 20px;
}

.payment-icons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.icon-block {
  width: 80px;
  text-align: center;
  transition: transform 0.3s ease;
}

.icon-block:hover {
  transform: scale(1.08);
}

.icon-block img {
  width: 50px;
  height: 50px;
}

.icon-block p {
  margin-top: 5px;
  font-size: 14px;
}

/* Footer */
footer {
  background: #111;
  color: #ccc;
  text-align: center;
  padding: 20px;
  font-size: 14px;
  margin-top: 40px;
  border-top: 4px solid red;
}

footer .co {
  color: red;
}

footer .skill {
  color: white;
}

/* Input Animation */
#amountInput.pulse {
  animation: pulseGlow 0.6s ease;
}

@keyframes fadeInScale {
  0% {
    opacity: 0;
    transform: scale(0.8);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulseGlow {
  0% {
    box-shadow: 0 0 0 rgba(255, 0, 0, 0.4);
  }
  50% {
    box-shadow: 0 0 20px rgba(255, 0, 0, 0.6);
  }
  100% {
    box-shadow: 0 0 0 rgba(255, 0, 0, 0.4);
  }
}

@keyframes buttonClick {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(0.95);
  }
  100% {
    transform: scale(1);
  }
}

/* Responsive */
@media (max-width: 480px) {
  .logo {
    font-size: 20px;
  }

  .container {
    margin: 15px;
    padding: 15px;
  }

  .quick {
    flex: 1 1 45%;
  }

  .icon-block {
    width: 60px;
  }

  .icon-block img {
    width: 40px;
    height: 40px;
  }
}