:root {
  --bg: #f5f6fa;
  --card-bg: #ffffff;
  --text: #2f3542;
  --muted: #747d8c;
  --income: #2e86de;
  --expense: #e55039;
  --accent: #10ac84;
  --border: #e1e4ea;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  padding: 24px 16px;
}

.container {
  width: 100%;
  max-width: 720px;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

h1 {
  margin: 0;
  font-size: 1.6rem;
}

h2 {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--muted);
}

#month-picker {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 0.95rem;
  background: var(--card-bg);
}

.summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.summary-card {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 14px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.summary-card .label {
  font-size: 0.8rem;
  color: var(--muted);
}

.summary-card .amount {
  font-size: 1.3rem;
  font-weight: bold;
  font-variant-numeric: tabular-nums;
}

.summary-card.income .amount { color: var(--income); }
.summary-card.expense .amount { color: var(--expense); }
.summary-card.balance .amount.minus { color: var(--expense); }

.card {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  margin-bottom: 16px;
}

.entry-form .form-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 10px;
}

.entry-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--muted);
}

.entry-form label.grow {
  flex: 1;
  min-width: 160px;
}

.entry-form input,
.entry-form select {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.95rem;
}

.entry-form input:focus,
.entry-form select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

#input-amount {
  width: 120px;
}

.add-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 9px 20px;
  font-size: 0.95rem;
  font-weight: bold;
  cursor: pointer;
}

.add-btn:hover {
  filter: brightness(1.1);
}

.chart {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.chart-row {
  display: grid;
  grid-template-columns: 90px 1fr 90px;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
}

.chart-bar-track {
  background: var(--bg);
  border-radius: 4px;
  height: 18px;
  overflow: hidden;
}

.chart-bar {
  height: 100%;
  background: var(--expense);
  border-radius: 4px;
  transition: width 0.4s ease;
}

.chart-amount {
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.entry-count {
  font-weight: normal;
  font-size: 0.85rem;
}

.entry-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.entry-list li {
  display: grid;
  grid-template-columns: 90px 70px 1fr 110px 32px;
  align-items: center;
  gap: 8px;
  padding: 10px 4px;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}

.entry-list li:last-child {
  border-bottom: none;
}

.entry-date {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.entry-category {
  background: var(--bg);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.8rem;
  text-align: center;
}

.entry-memo {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.entry-amount {
  text-align: right;
  font-weight: bold;
  font-variant-numeric: tabular-nums;
}

.entry-amount.income { color: var(--income); }
.entry-amount.expense { color: var(--expense); }

.delete-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px;
}

.delete-btn:hover {
  color: var(--expense);
}

.empty-message {
  color: var(--muted);
  text-align: center;
  margin: 8px 0;
}

@media (max-width: 560px) {
  .summary {
    grid-template-columns: 1fr;
  }
  .entry-list li {
    grid-template-columns: 80px 1fr 90px 28px;
  }
  .entry-category {
    display: none;
  }
}