* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: #f4f7f6;
  display: flex;
  justify-content: center;
  padding: 40px 20px;
}

.container {
  background: white;
  width: 100%;
  max-width: 400px;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

h2 {
  text-align: center;
  color: #333;
  margin-bottom: 20px;
}

.balance-card {
  background: #2c3e50;
  color: white;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  margin-bottom: 30px;
}

h3 {
  font-size: 16px;
  color: #666;
  margin-top: 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid #eee;
  padding-bottom: 5px;
}

.balance-card h3 {
  color: #ecf0f1;
  border: none;
}

.input-group {
  margin-bottom: 15px;
}

label {
  display: block;
  margin-bottom: 5px;
  font-size: 14px;
  color: #444;
}

input,
select {
  width: 100%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 14px;
}

button {
  width: 100%;
  padding: 12px;
  background: #27ae60;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  font-weight: bold;
  margin-top: 10px;
}
  
button:hover {
  opacity: 0.8;
}

ul {
  list-style-type: none;
  margin-top: 15px;
}

li {
  background: #f9f9f9;
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-left: 5px solid #ccc;
}

li.income {
  border-left-color: #27ae60;
  color: #27ae60;
}

li.expense {
  border-left-color: #e74c3c;
  color: #e74c3c;
}

li.empty-state {
  border-left: none;
  justify-content: center;
  color: #7f8c8d;
  font-style: italic;
  background: #f3f6f8;
}

.delete-btn {
  background: #e74c3c;
  color: white;
  border: none;
  padding: 5px 10px;
  cursor: pointer;
  border-radius: 3px;
  width: auto;
  margin-top: 0;
}

.transaction-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.transaction-amount {
  font-weight: 600;
}

/* --- Modal Styles --- */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.modal-overlay.show {
  display: flex;
}

.modal-content {
  background-color: white;
  padding: 25px;
  border-radius: 8px;
  width: 90%;
  max-width: 350px;
  text-align: center;
  position: relative;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  animation: slideDown 0.3s ease-out;
}

.close-btn {
  position: absolute;
  top: 10px;
  right: 15px;
  font-size: 24px;
  font-weight: bold;
  color: #888;
  cursor: pointer;
}

.close-btn:hover {
  color: #333;
}

.modal-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
  gap: 15px;
}

.confirm-btn {
  background-color: #e74c3c;
  margin-top: 0;
}

.confirm-btn:hover {
  background-color: #c0392b;
}

.cancel-btn {
  background-color: #ecf0f1;
  color: #333;
  margin-top: 0;
}

.cancel-btn:hover {
  background-color: #bdc3c7;
}

@keyframes slideDown {
  from {
    transform: translateY(-30px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}