/* Reset some default styling */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f9f9f9;
  color: #333;
  line-height: 1.6;
  padding: 0 1rem;
}

header {
  text-align: center;
  padding: 2rem 1rem;
  background-color: #2c3e50;
  color: #fff;
  border-radius: 0 0 10px 10px;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

main {
  max-width: 1000px;
  margin: 2rem auto;
}

.form-section,
.summary-section,
.history-section,
.chart-section {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.form-section h2,
.history-section h2,
.chart-section h2 {
  margin-bottom: 1rem;
  color: #2c3e50;
}

form {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

form input,
form select {
  flex: 1 1 200px;
  padding: 0.6rem;
  border: 1px solid #ccc;
  border-radius: 8px;
}

form button {
  background-color: #2ecc71;
  color: white;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}

form button:hover {
  background-color: #27ae60;
}

/* Summary Cards */
.summary-section {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  text-align: center;
}

.card {
  flex: 1 1 30%;
  padding: 1rem;
  border-radius: 10px;
  background: #ecf0f1;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.income-card {
  border-left: 5px solid #2ecc71;
}

.expense-card {
  border-left: 5px solid #e74c3c;
}

.balance-card {
  border-left: 5px solid #3498db;
}

.card h3 {
  margin-bottom: 0.5rem;
}

#transaction-list {
  list-style: none;
}

#transaction-list li {
  padding: 0.8rem 1rem;
  background: #f0f3f5;
  border-left: 5px solid #bdc3c7;
  border-radius: 8px;
  margin-bottom: 0.7rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Chart Section */
.chart-section canvas {
  max-width: 100%;
  height: auto;
}

/* Footer */
footer {
  text-align: center;
  padding: 1rem 0;
  margin-top: 2rem;
  color: #555;
}

  @media (max-width: 600px) {
      form {
        grid-template-columns: 1fr;
      }

      .summary-section {
        flex-direction: column;
      }

      form input, form select, form button {
        font-size: 0.9rem;
        padding: 0.6rem;
      }

      h1 {
        font-size: 1.5rem;
      }

      h2 {
        font-size: 1.25rem;
      }
    }