:root {
  --bg: #f7f8f7;
  --fg: #1f2421;
  --muted: #6b7570;
  --primary: #0f9d58;
  --primary-dark: #0b7a44;
  --danger: #c0392b;
  --card: #fff;
  --border: #e2e6e3;
  --warn: #d97706;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121412;
    --fg: #e8eae8;
    --muted: #9aa39e;
    --card: #1c1f1d;
    --border: #2c302e;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--fg);
  font-size: 16px;
  padding-bottom: env(safe-area-inset-bottom);
}
.app-header {
  background: var(--primary);
  color: #fff;
  padding: 12px 16px calc(12px + env(safe-area-inset-top)) 16px;
  padding-top: calc(12px + env(safe-area-inset-top));
  position: sticky;
  top: 0;
  z-index: 10;
}
.app-header h1 { margin: 0 0 8px; font-size: 18px; }
.tabs { display: flex; gap: 4px; }
.tab {
  flex: 1;
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 0;
  padding: 8px 0;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
}
.tab.is-active { background: #fff; color: var(--primary-dark); font-weight: 700; }

main { max-width: 720px; margin: 0 auto; padding: 12px; }
.panel { display: none; }
.panel.is-active { display: block; }

.date-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.date-row button {
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--fg);
  border-radius: 6px;
  font-size: 18px;
  cursor: pointer;
}
.date-row input { flex: 1; }

input, select, textarea, button {
  font: inherit;
  color: inherit;
}
input[type="text"], input[type="number"], input[type="password"], input[type="date"], select, textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
}
label { display: block; font-size: 13px; color: var(--muted); }
label input, label select, label textarea { margin-top: 4px; color: var(--fg); }

.balance-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}
.balance-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 4px 0;
}
.balance-row span { color: var(--muted); }
.balance-row strong { font-size: 22px; font-variant-numeric: tabular-nums; }
.balance-total strong { font-size: 28px; }
.balance-card hr { border: 0; border-top: 1px solid var(--border); margin: 8px 0; }
.balance-card.deficit .balance-total strong { color: var(--primary); }
.balance-card.surplus .balance-total strong { color: var(--warn); }
.hint { color: var(--muted); font-size: 13px; margin: 8px 0 0; }

.block {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}
.block h2 { margin: 0 0 8px; font-size: 16px; }
.muted { color: var(--muted); font-size: 13px; margin: 0 0 8px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.meal-add {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.photo-btn {
  flex: 1 1 auto;
  background: var(--primary);
  color: #fff;
  padding: 12px;
  text-align: center;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
}
button {
  background: var(--primary);
  color: #fff;
  border: 0;
  padding: 10px 14px;
  border-radius: 6px;
  cursor: pointer;
}
button.secondary {
  background: var(--card);
  color: var(--fg);
  border: 1px solid var(--border);
}
button.danger { background: var(--danger); color: #fff; }

.meal-list { list-style: none; padding: 0; margin: 0; }
.meal-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.meal-list li:last-child { border-bottom: 0; }
.meal-list .name { flex: 1; }
.meal-list .name small { display: block; color: var(--muted); font-size: 12px; }
.meal-list .kcal { font-weight: 700; font-variant-numeric: tabular-nums; }
.meal-list button.del {
  background: transparent;
  color: var(--muted);
  padding: 6px 8px;
}

.status {
  margin: 8px 0;
  padding: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
}
.status.error { border-color: var(--danger); color: var(--danger); }

.history-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  font-size: 13px;
}
.history-table th, .history-table td {
  padding: 8px;
  text-align: right;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}
.history-table th:first-child, .history-table td:first-child { text-align: left; }
.history-table tr:last-child td { border-bottom: 0; }
.history-table .deficit { color: var(--primary); }
.history-table .surplus { color: var(--warn); }

dialog {
  border: 0;
  border-radius: 12px;
  padding: 16px;
  background: var(--card);
  color: var(--fg);
  max-width: 90vw;
  width: 360px;
}
dialog::backdrop { background: rgba(0,0,0,0.4); }
dialog h3 { margin: 0 0 12px; }
dialog label { margin-bottom: 10px; }
.dialog-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 12px; }
#meal-photo-preview img { width: 100%; border-radius: 6px; margin: 8px 0; }

.checkbox { display: flex; align-items: center; gap: 6px; margin-top: 8px; font-size: 13px; }
.checkbox input { width: auto; margin-top: 0; }