/* =========================================================
   マネーものさし — 共通スタイル
   コンセプト: 精密計器 / 方眼紙  配色: 藍 × 琥珀
   ========================================================= */

:root {
  /* light palette */
  --ground: #e9ecf0;
  --surface: #ffffff;
  --surface-2: #f3f5f8;
  --ink: #141a24;
  --ink-soft: #5b6673;
  --line: #d7dde4;
  --accent: #2b45c4;      /* indigo */
  --accent-ink: #223aad;
  --signal: #a9640f;      /* amber (text-safe on light) */
  --signal-bg: #f6ead4;
  --good: #1c7a4f;
  --bad: #bf4630;
  --grid: rgba(20, 26, 36, .05);
  --shadow: 0 1px 2px rgba(20, 26, 36, .05), 0 14px 30px rgba(20, 26, 36, .06);

  --font-jp: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  --font-head: "Zen Kaku Gothic New", "Noto Sans JP", "Hiragino Kaku Gothic ProN", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas, "Roboto Mono", monospace;
  --wrap: 1000px;
  --radius: 12px;
}

:root:not([data-theme="light"]) {
  @media (prefers-color-scheme: dark) {
    --ground: #0b0f16;
    --surface: #141b26;
    --surface-2: #1b2431;
    --ink: #eaeef4;
    --ink-soft: #8b96a5;
    --line: #29323f;
    --accent: #8296ff;
    --accent-ink: #a9b6ff;
    --signal: #e6ac5c;
    --signal-bg: #33291a;
    --good: #4fbd85;
    --bad: #f0836a;
    --grid: rgba(255, 255, 255, .045);
    --shadow: 0 18px 44px rgba(0, 0, 0, .40);
  }
}
:root[data-theme="dark"] {
  --ground: #0b0f16;
  --surface: #141b26;
  --surface-2: #1b2431;
  --ink: #eaeef4;
  --ink-soft: #8b96a5;
  --line: #29323f;
  --accent: #8296ff;
  --accent-ink: #a9b6ff;
  --signal: #e6ac5c;
  --signal-bg: #33291a;
  --good: #4fbd85;
  --bad: #f0836a;
  --grid: rgba(255, 255, 255, .045);
  --shadow: 0 18px 44px rgba(0, 0, 0, .40);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-jp);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--accent-ink); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-color: var(--accent); }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 2px; border-radius: 4px; }
img { max-width: 100%; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */
.site-head {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-head .bar {
  max-width: var(--wrap); margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; gap: 18px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 800; }
.brand .mark {
  font-family: var(--font-mono); font-weight: 700; color: var(--accent);
  border: 1.5px solid var(--accent); border-radius: 7px; padding: 2px 7px; font-size: 13px; letter-spacing: -.03em;
}
.brand .name { font-size: 16px; letter-spacing: .02em; }
.site-head nav { margin-left: auto; display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.site-head nav a {
  color: var(--ink-soft); text-decoration: none; font-size: 13.5px; font-weight: 600;
  padding: 6px 10px; border-radius: 8px;
}
.site-head nav a:hover { color: var(--ink); background: var(--surface-2); }
.theme-btn {
  margin-left: 6px; background: var(--surface); border: 1px solid var(--line); color: var(--ink-soft);
  width: 34px; height: 34px; border-radius: 9px; cursor: pointer; font-size: 15px; line-height: 1;
  display: inline-flex; align-items: center; justify-content: center;
}
.theme-btn:hover { color: var(--ink); border-color: var(--accent); }

/* ---------- hero (home) ---------- */
.hero {
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 26px 26px;
}
.hero .wrap { padding-top: 64px; padding-bottom: 56px; }
.hero .eyebrow {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--accent-ink); margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(30px, 6vw, 52px); line-height: 1.2; margin: 0 0 16px; letter-spacing: .01em;
  text-wrap: balance; max-width: 16em;
}
.hero .lead { font-size: clamp(15px, 2.4vw, 18px); color: var(--ink-soft); max-width: 34em; margin: 0; }

/* ---------- section ---------- */
section { padding: 46px 0; }
.section-label {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-soft); margin: 0 0 18px; display: flex; align-items: center; gap: 12px;
}
.section-label::after { content: ""; flex: 1; height: 1px; background: var(--line); }
h1, h2, h3, .hero h1, .tool-head h1 { font-family: var(--font-head); font-weight: 900; letter-spacing: .01em; }
h2 { font-size: clamp(22px, 4vw, 28px); margin: 0 0 8px; letter-spacing: .01em; }

/* ---------- tool cards ---------- */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.tool-card {
  position: relative; display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; text-decoration: none; color: inherit; transition: transform .12s ease, border-color .12s ease, box-shadow .12s ease;
}
.tool-card:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: var(--shadow); }
.tool-card .tag {
  align-self: flex-start; font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em;
  color: var(--accent-ink); background: color-mix(in srgb, var(--accent) 10%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--line)); padding: 3px 9px; border-radius: 999px;
}
.tool-card h3 { font-size: 19px; margin: 14px 0 6px; }
.tool-card p { margin: 0 0 16px; color: var(--ink-soft); font-size: 14px; }
.tool-card .sample {
  margin-top: auto; font-family: var(--font-mono); font-size: 13px; color: var(--ink-soft);
  border-top: 1px dashed var(--line); padding-top: 12px; display: flex; justify-content: space-between; gap: 8px;
}
.tool-card .sample b { color: var(--signal); font-weight: 700; }
.tool-card .go { position: absolute; top: 22px; right: 22px; color: var(--ink-soft); font-family: var(--font-mono); }
.tool-card:hover .go { color: var(--accent); }

/* ---------- tool page ---------- */
.crumb { font-size: 13px; color: var(--ink-soft); padding: 22px 0 0; }
.crumb a { color: var(--ink-soft); }
.tool-head { padding: 12px 0 8px; }
.tool-head h1 { font-size: clamp(26px, 5vw, 38px); margin: 8px 0 10px; letter-spacing: .01em; text-wrap: balance; }
.tool-head .lead { color: var(--ink-soft); max-width: 40em; margin: 0; }

.tool-layout { display: grid; grid-template-columns: 1fr; gap: 20px; align-items: start; padding-bottom: 8px; }
@media (min-width: 820px) { .tool-layout { grid-template-columns: 1fr 1fr; } }

.panel {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow);
}
.panel h2 { font-size: 15px; letter-spacing: .04em; color: var(--ink-soft); margin: 0 0 18px;
  font-family: var(--font-mono); text-transform: uppercase; }

.field { margin-bottom: 18px; }
.field:last-child { margin-bottom: 0; }
label { display: block; font-weight: 700; font-size: 14px; margin-bottom: 8px; }
.hint { font-weight: 400; color: var(--ink-soft); font-size: 12px; }
.inputline { position: relative; display: flex; align-items: center; }
.inputline .unit { position: absolute; right: 14px; color: var(--ink-soft); font-size: 14px; pointer-events: none; }
input[type="number"], select {
  width: 100%; font-family: var(--font-mono); font-size: 20px; font-weight: 700;
  padding: 13px 46px 13px 14px; border: 1.5px solid var(--line); border-radius: 10px;
  background: var(--surface-2); color: var(--ink); font-variant-numeric: tabular-nums; -moz-appearance: textfield;
}
select { padding-right: 14px; font-size: 15px; font-family: var(--font-jp); }
input[type="number"]::-webkit-outer-spin-button, input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input:focus-visible, select:focus-visible { border-color: var(--accent); }

.segment { display: flex; gap: 8px; flex-wrap: wrap; }
.segment label {
  flex: 1 1 auto; text-align: center; margin: 0; cursor: pointer; user-select: none;
  border: 1.5px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 13.5px; background: var(--surface-2);
}
.segment input { position: absolute; opacity: 0; pointer-events: none; }
.segment label:has(input:checked) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, var(--surface)); color: var(--accent-ink); }

/* readout */
.readout { display: flex; flex-direction: column; }
.readout .lead-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); }
.readout .amount {
  font-family: var(--font-mono); font-weight: 800; font-size: clamp(34px, 9vw, 52px);
  color: var(--signal); font-variant-numeric: tabular-nums; letter-spacing: -.02em; line-height: 1.1; margin: 6px 0;
}
.readout .amount .yen { font-size: .48em; color: var(--ink-soft); margin-right: 4px; }
.readout .sub { color: var(--ink-soft); font-size: 14px; font-family: var(--font-mono); }
.readout .pill {
  align-self: flex-start; margin-top: 12px; font-family: var(--font-mono); font-weight: 700; font-size: 13px;
  padding: 5px 12px; border-radius: 999px; background: color-mix(in srgb, var(--good) 15%, var(--surface)); color: var(--good);
}

table.breakdown { width: 100%; border-collapse: collapse; margin-top: 22px; font-size: 14px; }
table.breakdown caption { text-align: left; font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; color: var(--ink-soft); margin-bottom: 8px; }
table.breakdown th, table.breakdown td { padding: 11px 2px; border-bottom: 1px solid var(--line); text-align: left; }
table.breakdown td.num { text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-weight: 700; }
table.breakdown tr.minus td.num { color: var(--bad); }
table.breakdown tr.total td { border-bottom: none; border-top: 2px solid var(--ink); font-weight: 800; padding-top: 14px; }

/* prose / FAQ / SEO copy */
.prose { max-width: 46em; }
.prose h2 { margin-top: 8px; }
.prose h3 { font-size: 17px; margin: 26px 0 6px; }
.prose p { color: var(--ink); }
.faq { border-top: 1px solid var(--line); }
.faq details {
  border-bottom: 1px solid var(--line); padding: 6px 0;
}
.faq summary { cursor: pointer; font-weight: 700; padding: 14px 4px; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; position: absolute; right: 6px; color: var(--accent); font-family: var(--font-mono); }
.faq details[open] summary::after { content: "－"; }
.faq details p { margin: 0 4px 14px; color: var(--ink-soft); }

.note {
  margin-top: 22px; font-size: 12.5px; color: var(--ink-soft); line-height: 1.8;
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px;
}
.note strong { color: var(--ink); }

/* related */
.related .tool-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }

/* footer */
.site-foot { border-top: 1px solid var(--line); background: var(--surface); margin-top: 40px; }
.site-foot .wrap { padding: 34px 20px; display: flex; flex-wrap: wrap; gap: 24px 40px; justify-content: space-between; }
.site-foot .brand { margin-bottom: 8px; }
.site-foot .col h4 { font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); margin: 0 0 10px; }
.site-foot .col a { display: block; color: var(--ink-soft); text-decoration: none; font-size: 14px; padding: 3px 0; }
.site-foot .col a:hover { color: var(--ink); }
.site-foot .copy { width: 100%; border-top: 1px solid var(--line); padding-top: 16px; font-size: 12px; color: var(--ink-soft); }
.disclaimer { font-size: 11.5px; color: var(--ink-soft); line-height: 1.7; margin-top: 10px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }