/* Variables de base */
:root {
    --primary-color: #89cff0; /* Pastel Blue */
    --secondary-color: #ffa07a; /* Light Salmon */
    --background-color: #fefefe; /* Soft White */
    --text-color: #333; /* Dark Gray */
    --card-color: #f0f4f8; /* Light Gray Blue */
    --btn-danger: #ff6f61; /* Coral Red */
    --light-gray: #dcdcdc;
  }
  
  /* Global styles */
  body {
    font-family: 'Arial', sans-serif;
    background-color: var(--background-color);
    margin: 0;
    padding: 0;
    color: var(--text-color);
    line-height: 1.6;
  }
  
  /* Container */
  .container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
  }
  
  /* Header */
  .header {
    text-align: center;
    margin-bottom: 20px;
  }
  
  .header h1 {
    font-size: 2rem;
    color: var(--primary-color);
  }
  
  .header p {
    font-size: 1.2rem;
    color: var(--text-color);
  }
  
  /* Balance Section */
  .balance-section {
    background: var(--card-color);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    text-align: center;
    margin-bottom: 20px;
  }
  
  .balance-section h2 {
    font-size: 1.5rem;
  }
  
  .balance {
    font-size: 2rem;
    font-weight: bold;
    color: var(--secondary-color);
  }
  
  /* Transaction Form */
  .transaction-form {
    background: var(--card-color);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
  }
  
  .transaction-form h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
  }
  
  .form-group {
    margin-bottom: 15px;
  }
  
  .form-group label {
    display: block;
    margin-bottom: 5px;
  }
  
  .form-group input,
  .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--light-gray);
    border-radius: 4px;
    font-size: 1rem;
  }
  
  .btn {
    background-color: var(--primary-color);
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
  }
  
  .btn:hover {
    background-color: #76b7e5;
  }
  
  .btn-danger {
    background-color: var(--btn-danger);
  }
  
  .btn-danger:hover {
    background-color: #e55a4e;
  }
  
  /* Export Buttons */
  .export-buttons {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-bottom: 20px;
  }
  
  /* Transaction History */
  .transaction-history {
    background: var(--card-color);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  .transaction-history h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
  }
  
  .transaction-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .transaction-list li {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--light-gray);
  }
  
  .transaction-list li:last-child {
    border-bottom: none;
  }
  
  .transaction-list .amount {
    font-weight: bold;
  }
  
  .transaction-list .donation {
    color: green;
  }
  
  .transaction-list .expense {
    color: red;
  }