body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: #f4f7f6;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.container {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 700px;
  margin-bottom: 25px;
}
h2 {
  color: #333;
  margin-top: 0;
  border-bottom: 2px solid #eee;
  padding-bottom: 10px;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}
.table-scroll {
  width: 100%;
  overflow-x: auto;
}
.table-scroll table {
  min-width: 760px;
}
th,
td {
  min-width: 120px;
}
th {
  text-align: left;
  color: #666;
  font-size: 0.8rem;
  text-transform: uppercase;
  padding: 10px;
  border-bottom: 2px solid #eee;
}
td {
  padding: 12px 10px;
  border-bottom: 1px solid #f0f0f0;
}
tr:last-child td {
  border-bottom: none;
  font-weight: bold;
  background: #fafafa;
}
.amount-neg {
  color: #d32f2f;
  font-weight: bold;
}
.interest-tag {
  font-size: 0.85rem;
  color: #2e7d32;
}
.calc-group {
  margin-bottom: 15px;
}
label {
  display: block;
  font-size: 0.85rem;
  font-weight: bold;
  color: #666;
  margin-bottom: 5px;
}
input {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  box-sizing: border-box;
}
.result-area {
  background: #e8f5e9;
  padding: 15px;
  border-radius: 8px;
  margin-top: 15px;
  border: 1px solid #c8e6c9;
}

@media (max-width: 640px) {
  body {
    padding: 20px 12px;
  }

  .container {
    padding: 1.25rem;
    margin-bottom: 20px;
  }

  h2 {
    font-size: 1.2rem;
  }

  th,
  td {
    padding: 10px 8px;
    font-size: 0.92rem;
  }

  .calc-group {
    margin-bottom: 12px;
  }

  input {
    padding: 12px;
  }

  .result-area {
    padding: 14px;
  }

  .result-area div {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px;
  }
}