body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(to bottom, #00c853, #b2ff59);
  color: #333;
}

.splash-screen {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: linear-gradient(to bottom right, #00c853, #b2ff59);
  color: white;
  text-align: center;
  padding: 2rem;
}

.splash-screen h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.splash-screen p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.splash-screen button {
  padding: 0.75rem 2rem;
  border: none;
  background: white;
  color: #00c853;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
}

.app {
  padding: 1rem;
}

header h1 {
  font-size: 1.5rem;
  margin: 0;
}

.balance-section {
  background: white;
  border-radius: 12px;
  padding: 1rem;
  margin-top: 1rem;
}

.balance-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.action-buttons {
  margin-top: 1rem;
  display: flex;
  gap: 1rem;
}

.action-buttons button {
  flex: 1;
  padding: 0.5rem;
  border-radius: 8px;
  background: #eee;
  border: none;
  font-weight: bold;
}

.tiles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}

.tile {
  background: white;
  padding: 1rem;
  border-radius: 12px;
  text-align: center;
}

.tile img {
  width: 30px;
  height: 30px;
  margin-bottom: 0.5rem;
}

.payment-section {
  text-align: center;
  margin-top: 1rem;
}

#payBtn {
  font-size: 2rem;
  padding: 1rem;
  border-radius: 50%;
  background: black;
  color: white;
  border: none;
}

.payment-history {
  margin-top: 2rem;
}

.history-item {
  background: white;
  padding: 1rem;
  border-radius: 8px;
  margin-top: 0.5rem;
  cursor: pointer;
}

.modal, .receipt {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.7);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-content, .receipt-content {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  width: 90%;
  max-width: 400px;
  text-align: center;
}

.modal-content input, .modal-content select {
  display: block;
  width: 100%;
  margin: 1rem 0;
  padding: 0.5rem;
  border-radius: 8px;
  border: 1px solid #ccc;
}

.receipt-content .circle {
  width: 60px;
  height: 60px;
  background: red;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto 1rem;
}

.check {
  font-weight: bold;
  margin: 1rem 0;
  font-size: 1.2rem;
}

.receipt-details p {
  margin: 0.5rem 0;
}