* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: #f0f4f8;
  color: #333;
  padding: 24px 16px;
}

.app {
  max-width: 640px;
  margin: 0 auto;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  font-size: 28px;
}

h2 {
  font-size: 18px;
  margin-bottom: 12px;
}

.summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

.card .label {
  font-size: 13px;
  color: #888;
  margin-bottom: 6px;
}

.card .value {
  font-size: 20px;
  font-weight: 700;
}

.card.income .value { color: #2e7d32; }
.card.expense .value { color: #c62828; }
.card.balance .value { color: #1565c0; }

.entry {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
  margin-bottom: 24px;
}

.row {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.row select,
.row input {
  flex: 1;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
}

.row button {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  background: #1565c0;
  color: #fff;
  font-size: 14px;
  cursor: pointer;
}

.row button:hover {
  background: #0d47a1;
}

.records {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

.records ul {
  list-style: none;
}

.record {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid #f0f0f0;
}

.record:last-child {
  border-bottom: none;
}

.record .meta {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.record .category {
  font-weight: 600;
}

.record .note {
  font-size: 13px;
  color: #888;
}

.record .date {
  font-size: 12px;
  color: #aaa;
}

.record .amount {
  font-weight: 700;
}

.record .amount.income { color: #2e7d32; }
.record .amount.expense { color: #c62828; }

.record .delete {
  border: none;
  background: #eee;
  color: #666;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
}

.record .delete:hover {
  background: #fdecea;
  color: #c62828;
}

.empty {
  text-align: center;
  color: #aaa;
  padding: 20px 0;
}