/* 顔: 預金通帳。目的「自分の固定費を公的な平均と照らし、どこから削るかを決める」から、
   家計の数字が並ぶ一番身近な紙=通帳の罫と等幅の印字を借りた。
   いつもの顔(Noto+生成り+角丸4/8px)と違う軸: ①地=通帳の薄緑の罫 ②数字は等幅の印字書体・角は0 */
:root {
  --paper: #fbfdf9;
  --rule: #d7e8d3;
  --rule-strong: #9cc29a;
  --ink: #1d2a22;
  --muted: #5a6b5f;
  --stamp: #b3261e;      /* 平均より多い=朱の印 */
  --ok: #2f6b3a;         /* 平均以下 */
  --band: #2f6b3a;       /* 通帳の表紙帯 */
  --band-ink: #f4faf2;
  --focus: #1f5fbf;
  --pr-bg: #fff8e6;
  --pr-line: #e3c67a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #121814;
    --rule: #223026;
    --rule-strong: #3b5a41;
    --ink: #e4efe4;
    --muted: #9db3a2;
    --stamp: #ff8a80;
    --ok: #8fd19a;
    --band: #1e3b25;
    --band-ink: #e4efe4;
    --focus: #8ab4ff;
    --pr-bg: #2a2413;
    --pr-line: #6b5a2a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  background-image: repeating-linear-gradient(to bottom, transparent 0 31px, var(--rule) 31px 32px);
  color: var(--ink);
  font-family: "BIZ UDPGothic", "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.9;
  font-size: 16px;
}
.num, input, .ledger td.n, .big {
  font-family: "BIZ UDGothic", "Osaka-Mono", ui-monospace, monospace;
  font-variant-numeric: tabular-nums;
}
header.band {
  background: var(--band);
  color: var(--band-ink);
  padding: 20px 16px 16px;
}
header.band .inner, main, footer { max-width: 760px; margin: 0 auto; }
header.band h1 { margin: 0; font-size: 1.5rem; line-height: 1.4; letter-spacing: .02em; }
header.band p { margin: 6px 0 0; font-size: .92rem; opacity: .9; }
main { padding: 8px 16px 40px; }
h2 { font-size: 1.25rem; margin: 40px 0 8px; border-bottom: 2px solid var(--rule-strong); line-height: 1.5; }
h3 { font-size: 1.05rem; margin: 28px 0 4px; }
a { color: var(--focus); }
.safe { font-size: .88rem; color: var(--muted); margin: 12px 0; }

.sheet {
  border: 1px solid var(--rule-strong);
  background: var(--paper);
  margin: 16px 0;
}
.sheet .row {
  display: grid;
  grid-template-columns: 1fr 9.5em;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-bottom: 1px dashed var(--rule-strong);
}
.sheet .row:last-child { border-bottom: 0; }
.sheet label { font-size: .98rem; }
.sheet label small { display: block; color: var(--muted); font-size: .78rem; line-height: 1.4; }
.sheet select, .sheet input {
  width: 100%;
  font-size: 1.05rem;
  padding: 6px 8px;
  border: 1px solid var(--rule-strong);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  text-align: right;
}
.sheet select { text-align: left; font-family: inherit; }
.sheet input:focus, .sheet select:focus, button:focus { outline: 2px solid var(--focus); outline-offset: 1px; }
.yen { position: relative; }
.yen::after { content: "円"; position: absolute; right: -1.4em; top: 50%; transform: translateY(-50%); font-size: .85rem; color: var(--muted); }
.sheet .row .yen { margin-right: 1.4em; }

button.go {
  display: block;
  width: 100%;
  margin: 12px 0;
  padding: 14px;
  font-size: 1.1rem;
  font-family: inherit;
  font-weight: 700;
  border: 0;
  border-radius: 0;
  background: var(--band);
  color: var(--band-ink);
  cursor: pointer;
}

.result { margin: 24px 0; }
.big { font-size: 2rem; line-height: 1.3; }
.big small { font-size: 1rem; }
table.ledger { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: .95rem; }
table.ledger th, table.ledger td { border-bottom: 1px solid var(--rule-strong); padding: 6px 6px; text-align: left; vertical-align: top; }
table.ledger th { font-weight: 400; color: var(--muted); font-size: .82rem; }
table.ledger td.n { text-align: right; white-space: nowrap; }
.over { color: var(--stamp); font-weight: 700; }
.under { color: var(--ok); }
.stamp {
  display: inline-block;
  border: 2px solid var(--stamp);
  color: var(--stamp);
  padding: 0 6px;
  font-size: .8rem;
  line-height: 1.6;
  transform: rotate(-4deg);
  font-weight: 700;
}
.note { font-size: .85rem; color: var(--muted); }
.pr {
  border: 1px solid var(--pr-line);
  background: var(--pr-bg);
  padding: 12px;
  margin: 16px 0;
  font-size: .95rem;
}
.pr .tag { display: inline-block; border: 1px solid currentColor; font-size: .75rem; padding: 0 4px; margin-right: 6px; }
.src { font-size: .82rem; color: var(--muted); border-top: 1px solid var(--rule-strong); padding-top: 8px; margin-top: 24px; }
.hide { display: none; }
footer { padding: 16px; font-size: .8rem; color: var(--muted); }
nav.x { margin: 8px 0 0; font-size: .9rem; }
nav.x a { color: var(--band-ink); margin-right: 12px; }

@media (max-width: 480px) {
  .sheet .row { grid-template-columns: 1fr 8em; }
  .big { font-size: 1.6rem; }
  table.ledger { font-size: .85rem; }
}
.sheet .row.sel { grid-template-columns: 5.5em 1fr; }