:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --surface-2: #f0efec;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #6f6d68;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.12);
  --accent: #17704d;
  --accent-ink: #ffffff;
  --profit: #2a78d6;
  --loss: #eb6834;
  --s1: #2a78d6;
  --s2: #eb6834;
  --s3: #1baf7a;
  --warn-bg: #fff4e0;
  --warn-border: #eda100;
  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #262624;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #9a988f;
    --grid: #2c2c2a;
    --axis: #45453f;
    --border: rgba(255, 255, 255, 0.12);
    --accent: #5cc79c;
    --accent-ink: #0b0b0b;
    --profit: #3987e5;
    --loss: #d95926;
    --s1: #3987e5;
    --s2: #d95926;
    --s3: #199e70;
    --warn-bg: #2e2412;
    --warn-border: #c98500;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
}
a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }
img, svg { max-width: 100%; }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }

/* header / footer */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 4px 16px; padding-top: 10px; padding-bottom: 10px; }
.site-name { font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: 2px 14px; font-size: 15px; }
.site-nav a { color: var(--ink-2); text-decoration: none; padding: 4px 0; }
.site-nav a[aria-current="page"] { color: var(--ink); font-weight: 700; border-bottom: 2px solid var(--accent); }
.site-footer { margin-top: 64px; padding: 24px 0 32px; border-top: 1px solid var(--border); background: var(--surface); font-size: 14px; color: var(--ink-2); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.footer-nav a { color: var(--ink-2); }
.footer-note { margin: 12px 0 4px; }
.copyright { margin: 0; color: var(--muted); }

/* typography */
main { padding-top: 24px; }
h1 { font-size: 26px; line-height: 1.4; margin: 8px 0 12px; }
h2 { font-size: 21px; line-height: 1.45; margin: 40px 0 12px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
h3 { font-size: 18px; margin: 28px 0 8px; }
p { margin: 0 0 14px; }
.lead { font-size: 17px; color: var(--ink-2); }
.prose { max-width: 760px; }
.prose li { margin-bottom: 6px; }
.note { font-size: 14px; color: var(--ink-2); }
.article-meta { font-size: 13px; color: var(--muted); margin: 0 0 4px; }
.back-link { margin-top: 40px; }
code, kbd { font-family: ui-monospace, Consolas, monospace; font-size: 0.92em; background: var(--surface-2); padding: 1px 5px; border-radius: 4px; }
.formula { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 16px; margin: 0 0 16px; }
.callout { background: var(--warn-bg); border-left: 4px solid var(--warn-border); padding: 12px 16px; border-radius: 6px; margin: 0 0 16px; }
.callout p:last-child { margin-bottom: 0; }

/* cards on top page */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin: 16px 0 8px; }
.card { display: block; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; color: var(--ink); text-decoration: none; }
.card:hover { border-color: var(--accent); }
.card h2 { border: 0; margin: 0 0 6px; padding: 0; font-size: 19px; }
.card p { margin: 0; color: var(--ink-2); font-size: 15px; }

.article-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.article-list a { display: block; padding: 14px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); text-decoration: none; }
.article-list a:hover { border-color: var(--accent); }
.al-title { display: block; font-weight: 700; color: var(--ink); }
.al-desc { display: block; font-size: 14px; color: var(--ink-2); line-height: 1.6; margin-top: 2px; }

/* buttons & forms */
.button, button {
  font: inherit; font-size: 15px; cursor: pointer;
  display: inline-block; padding: 9px 16px; border-radius: 8px;
  border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink);
  text-decoration: none; line-height: 1.4;
}
.button.secondary, button.secondary { background: transparent; color: var(--accent); }
button:focus-visible, .button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
label { font-size: 14px; color: var(--ink-2); }
input[type="number"], input[type="date"], input[type="text"], select {
  font: inherit; font-size: 16px; width: 100%; padding: 8px 10px;
  border: 1px solid var(--axis); border-radius: 8px; background: var(--surface); color: var(--ink);
}
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
legend { font-size: 14px; color: var(--ink-2); padding: 0; margin-bottom: 4px; }
.radio-row { display: flex; flex-wrap: wrap; gap: 4px 16px; }
.radio-row label { font-size: 15px; color: var(--ink); display: inline-flex; align-items: center; gap: 6px; }
.check { display: flex; align-items: flex-start; gap: 8px; font-size: 14px; color: var(--ink); }
.check input { margin-top: 5px; }

/* tool panels */
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; margin: 16px 0; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px 18px; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field .hint { font-size: 12px; color: var(--muted); line-height: 1.5; }
.input-unit { display: flex; align-items: center; gap: 6px; }
.input-unit span { font-size: 14px; color: var(--ink-2); white-space: nowrap; }

.dropzone {
  border: 2px dashed var(--axis); border-radius: var(--radius); padding: 28px 16px; text-align: center;
  background: var(--surface); transition: border-color .15s, background .15s;
}
.dropzone.dragover { border-color: var(--accent); background: var(--surface-2); }
.dropzone p { margin: 0 0 10px; }
.dropzone .actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.privacy-badge { font-size: 13px; color: var(--ink-2); margin-top: 10px; }
.status { font-size: 14px; color: var(--ink-2); min-height: 1.5em; margin: 8px 0 0; }
.status.error { color: #c0392b; }
@media (prefers-color-scheme: dark) { .status.error { color: #ff8a80; } }

.filters { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: flex-end; }
.filters .field { min-width: 150px; }

/* stat tiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 16px 0; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; }
.tile .t-label { font-size: 13px; color: var(--ink-2); line-height: 1.4; }
.tile .t-value { font-size: 24px; font-weight: 650; line-height: 1.3; margin-top: 2px; }
.tile .t-sub { font-size: 12px; color: var(--muted); line-height: 1.5; }
.hero { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; margin-top: 16px; }
.hero .t-label { font-size: 14px; color: var(--ink-2); }
.hero .t-value { font-size: 44px; font-weight: 650; line-height: 1.2; }
.hero .t-sub { font-size: 13px; color: var(--muted); }

/* insights */
.insights { margin: 0; padding-left: 1.2em; }
.insights li { margin-bottom: 6px; }

/* charts */
.chart-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px 10px; margin: 16px 0; position: relative; }
.chart-card h3 { margin: 0 0 2px; font-size: 16px; }
.chart-card .sub { font-size: 13px; color: var(--muted); margin: 0 0 8px; }
.chart { width: 100%; position: relative; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart text { fill: var(--muted); font-size: 11px; font-family: var(--font); }
.chart .grid line { stroke: var(--grid); stroke-width: 1; }
.chart .baseline { stroke: var(--axis); stroke-width: 1; }
.chart .zero { stroke: var(--axis); stroke-width: 1; }
.chart .line { fill: none; stroke: var(--profit); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .area { fill: var(--profit); opacity: 0.1; }
.chart .crosshair { stroke: var(--axis); stroke-width: 1; }
.chart .dot { fill: var(--profit); stroke: var(--surface); stroke-width: 2; }
.chart .bar-profit { fill: var(--profit); }
.chart .bar-loss { fill: var(--loss); }
.chart .bar:hover, .chart .bar.active { opacity: 0.8; }
.chart .hit { fill: transparent; cursor: crosshair; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 13px; color: var(--ink-2); margin: 0 0 6px; }
.legend .sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.sw-profit { background: var(--profit); }
.sw-loss { background: var(--loss); }
.tooltip {
  position: absolute; pointer-events: none; z-index: 5;
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,.12); padding: 8px 10px; font-size: 13px; line-height: 1.5;
  white-space: nowrap; color: var(--ink);
}
.tooltip .tt-value { font-weight: 700; font-size: 14px; }
.tooltip .tt-label { color: var(--ink-2); }
.tooltip[hidden] { display: none; }

/* figures in articles */
.fig { margin: 20px 0 24px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px 10px; }
.fig .fig-title { font-weight: 600; font-size: 15px; margin: 0 0 6px; }
.fig figcaption { font-size: 13px; color: var(--ink-2); line-height: 1.6; margin-top: 4px; }
.fig-chart { min-height: 120px; }
.chart .mark { fill: var(--ink); stroke: var(--surface); stroke-width: 2; }

/* 流れ図(JSなし。横に並べ、スマホでは縦に並べる) */
.flow { list-style: none; padding: 0; margin: 4px 0 6px; display: flex; gap: 28px; flex-wrap: nowrap; }
.flow li { flex: 1 1 0; position: relative; background: var(--surface-2); border-radius: 8px; padding: 10px 12px; margin: 0; }
.flow li + li::before { content: "→"; position: absolute; left: -22px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 18px; }
.flow .flow-step { display: block; font-weight: 650; font-size: 15px; line-height: 1.5; }
.flow .flow-sub { display: block; font-size: 13px; color: var(--ink-2); line-height: 1.55; margin-top: 2px; }
@media (max-width: 640px) {
  .flow { flex-direction: column; gap: 26px; }
  .flow li + li::before { content: "↓"; left: 50%; top: -24px; transform: translateX(-50%); }
}

/* tables */
.table-wrap { overflow-x: auto; margin: 8px 0 16px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; background: var(--surface); }
th, td { padding: 7px 10px; border-bottom: 1px solid var(--grid); text-align: left; white-space: nowrap; }
th { font-weight: 600; color: var(--ink-2); background: var(--surface-2); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
details { margin: 8px 0 16px; }
summary { cursor: pointer; color: var(--accent); font-size: 14px; }

/* results of sizer */
.result-main { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.r-big { font-size: 40px; font-weight: 650; line-height: 1.2; }
.binding { font-size: 13px; color: var(--ink-2); }
.warn { background: var(--warn-bg); border-left: 4px solid var(--warn-border); padding: 10px 14px; border-radius: 6px; font-size: 14px; margin: 12px 0 0; }
.warn[hidden] { display: none; }

@media (max-width: 600px) {
  h1 { font-size: 22px; }
  h2 { font-size: 19px; }
  .hero .t-value { font-size: 34px; }
  .r-big { font-size: 34px; }
  .panel { padding: 14px; }
}

/* くらし自動化ノート: コードブロック */
pre {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; margin: 0 0 16px; overflow-x: auto; line-height: 1.55;
}
pre code { background: none; padding: 0; border-radius: 0; font-size: 13.5px; white-space: pre; }
.code-label { font-size: 13px; color: var(--muted); margin: 0 0 4px; }

/* NotionのID取り出しツール */
textarea {
  font: inherit; font-size: 15px; width: 100%; min-height: 84px; padding: 8px 10px; resize: vertical;
  border: 1px solid var(--axis); border-radius: 8px; background: var(--surface); color: var(--ink);
  font-family: ui-monospace, Consolas, monospace;
}
textarea:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.id-results { display: grid; gap: 12px; margin-top: 12px; }
.id-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; }
.id-card h3 { margin: 0 0 4px; font-size: 16px; }
.id-card .id-where { font-size: 13px; color: var(--ink-2); margin: 0 0 8px; }
.id-line { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; margin: 4px 0; }
.id-line .id-kind { font-size: 12px; color: var(--muted); min-width: 7.5em; }
.id-line code { font-size: 14px; word-break: break-all; white-space: normal; }
.id-line button { font-size: 13px; padding: 3px 10px; }