/* レイアウト：細い帯（PR）→ ヘッダー → 入力と結果の2列（スマホは1列）→ 読み物の欄が縦に続く */
:root {
  --bg: #FFFFFF;
  --surface: #F6F9FC;
  --tint: #E3EEF8;
  --line: #D6E0EB;
  --fg: #1C2A3A;
  --muted: #4A5A6C;
  --navy: #13315C;
  --on-navy: #FFFFFF;
  --yellow: #F5C518;
  --on-yellow: #13315C;
  --good: #1F7A4D;
  --warn: #A3540A;
  --input-bg: #FFFFFF;
  --input-line: #8C9BAD;
  --f-display: "M PLUS Rounded 1c", "Hiragino Maru Gothic ProN", "Noto Sans JP", sans-serif;
  --f-body: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0F1823; --surface: #16212E; --tint: #1B2C42; --line: #2B3B4E;
    --fg: #E6EDF5; --muted: #A9B7C7; --navy: #9CC2F0; --on-navy: #0F1823;
    --yellow: #F5C518; --on-yellow: #13315C; --good: #6FD3A0; --warn: #F2B266;
    --input-bg: #0F1823; --input-line: #5E7186; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0F1823; --surface: #16212E; --tint: #1B2C42; --line: #2B3B4E;
  --fg: #E6EDF5; --muted: #A9B7C7; --navy: #9CC2F0; --on-navy: #0F1823;
  --yellow: #F5C518; --on-yellow: #13315C; --good: #6FD3A0; --warn: #F2B266;
  --input-bg: #0F1823; --input-line: #5E7186; color-scheme: dark;
}
* { box-sizing: border-box; }
html { padding-top: env(safe-area-inset-top, 0px); padding-bottom: env(safe-area-inset-bottom, 0px); }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--f-body); font-size: 16px; line-height: 1.75; }
a { color: var(--navy); }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; }
.wrap { max-width: 1080px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.pr { background: var(--navy); color: var(--on-navy); font-size: 12px; text-align: center; padding-block: 6px; }
header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-block: 12px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { width: 40px; height: 40px; border-radius: 50%; }
.brand b { font-family: var(--f-display); font-weight: 800; font-size: 19px; color: var(--navy); line-height: 1.2; display: block; }
.brand small { font-size: 12px; color: var(--muted); }
header.site nav { display: flex; gap: 4px; flex-wrap: wrap; }
header.site nav a { text-decoration: none; font-size: 14px; font-weight: 500; padding: 10px 12px; }
main { padding-block: 20px 56px; display: flex; flex-direction: column; gap: 40px; }
.crumb { font-size: 13px; color: var(--muted); display: flex; gap: 6px; flex-wrap: wrap; }
.intro { display: flex; flex-direction: column; gap: 10px; max-width: 46em; }
h1 { margin: 0; font-family: var(--f-display); font-weight: 800; font-size: clamp(26px, 4.4vw, 36px); line-height: 1.35; color: var(--navy); text-wrap: balance; }
h2 { margin: 0; font-family: var(--f-display); font-weight: 800; font-size: clamp(20px, 3vw, 24px); color: var(--navy); line-height: 1.4; text-wrap: balance; }
h3 { margin: 0; font-size: 17px; color: var(--navy); }
p { margin: 0; }
.lead { color: var(--muted); }

/* ツール本体 */
.tool { display: flex; flex-wrap: wrap; gap: 24px; align-items: flex-start; }
.panel { flex: 1 1 380px; min-width: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 24px; display: flex; flex-direction: column; gap: 22px; }
.step { display: flex; flex-direction: column; gap: 14px; }
.step-head { display: flex; align-items: baseline; gap: 10px; }
.step-no { font-family: var(--f-display); font-weight: 800; font-size: 13px; color: var(--on-yellow); background: var(--yellow); border-radius: 999px; padding: 2px 10px; flex: none; }
.step-head h2 { font-size: 18px; }
.seg { display: flex; border: 1px solid var(--input-line); border-radius: 12px; overflow: hidden; }
.seg label { flex: 1; text-align: center; font-size: 14px; font-weight: 700; padding: 12px 8px; cursor: pointer; color: var(--navy); background: var(--input-bg); min-height: 44px; display: flex; align-items: center; justify-content: center; }
.seg label + label { border-left: 1px solid var(--input-line); }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg input:checked + span { color: var(--on-navy); }
.seg label:has(input:checked) { background: var(--navy); color: var(--on-navy); }
.seg label:has(input:focus-visible) { outline: 3px solid var(--yellow); outline-offset: -3px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field > label { font-size: 14px; font-weight: 700; }
.field .opt { font-weight: 400; color: var(--muted); font-size: 12px; margin-left: 4px; }
.inrow { display: flex; align-items: center; gap: 8px; }
.inrow input, select { flex: 1; min-width: 0; font: inherit; font-size: 18px; padding: 10px 12px; border: 1px solid var(--input-line); border-radius: 10px; background: var(--input-bg); color: var(--fg); font-variant-numeric: tabular-nums; }
select { font-size: 16px; width: 100%; }
.unit { font-size: 14px; color: var(--muted); flex: none; min-width: 4.5em; }
.hint { font-size: 12px; color: var(--muted); line-height: 1.6; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 420px) { .grid2 { grid-template-columns: minmax(0, 1fr); } }

.result { flex: 1 1 420px; min-width: 0; display: flex; flex-direction: column; gap: 14px; }
.res-card { background: var(--tint); border-radius: 16px; padding: 24px; display: flex; flex-direction: column; gap: 18px; }
.res-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.badge { font-size: 12px; background: var(--bg); color: var(--fg); border-radius: 6px; padding: 3px 10px; }
.big { display: flex; flex-direction: column; gap: 2px; }
.big .k { font-size: 14px; color: var(--muted); }
.big .v { font-family: var(--f-display); font-weight: 800; font-size: clamp(40px, 7vw, 54px); line-height: 1.1; color: var(--navy); font-variant-numeric: tabular-nums; }
.big .v small { font-size: 20px; margin-left: 2px; }
.big .range { font-size: 14px; color: var(--fg); }
.tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.tile { background: var(--bg); border-radius: 12px; padding: 12px 14px; display: flex; flex-direction: column; gap: 2px; }
.tile .k { font-size: 12px; color: var(--muted); }
.tile .v { font-size: 20px; font-weight: 700; color: var(--navy); font-variant-numeric: tabular-nums; }
.tile .v small { font-size: 13px; margin-left: 1px; }
.tile .sub { font-size: 11px; color: var(--muted); font-variant-numeric: tabular-nums; }
@media (max-width: 460px) { .tiles { grid-template-columns: minmax(0, 1fr); } .tile { flex-direction: row; justify-content: space-between; align-items: baseline; flex-wrap: wrap; } }
.jis { font-size: 13px; color: var(--fg); background: var(--bg); border-radius: 12px; padding: 12px 14px; }
.jis b { font-variant-numeric: tabular-nums; }
.yagi { display: flex; gap: 12px; align-items: flex-start; }
.yagi img { width: 72px; height: 72px; border-radius: 50%; flex: none; }
.bubble { background: var(--bg); border-radius: 14px; padding: 12px 14px; font-size: 15px; line-height: 1.7; color: var(--fg); position: relative; }
.err { color: var(--warn); font-weight: 700; }
.note { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; font-size: 13px; line-height: 1.8; color: var(--fg); display: flex; flex-direction: column; gap: 4px; }
.note b { color: var(--navy); }

/* 読み物の欄 */
section.read { display: flex; flex-direction: column; gap: 16px; }
.cols { display: flex; flex-wrap: wrap; gap: 16px; }
.box { flex: 1 1 300px; min-width: 0; border: 1px solid var(--line); border-radius: 14px; padding: 18px; display: flex; flex-direction: column; gap: 8px; }
.box .fig { font-family: var(--f-display); font-weight: 800; font-size: 26px; color: var(--navy); font-variant-numeric: tabular-nums; }
.box .src { font-size: 12px; color: var(--muted); }
.tipwrap { display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap; }
.tipwrap > img { width: 88px; height: 88px; border-radius: 50%; flex: none; }
.tipwrap .cols { flex: 1 1 420px; min-width: 0; }
.text { max-width: 46em; display: flex; flex-direction: column; gap: 10px; }
ol.how { margin: 0; padding-left: 1.4em; display: flex; flex-direction: column; gap: 12px; max-width: 46em; }
ol.how b { color: var(--navy); }
.label-demo { overflow-x: auto; }
ul.tips { margin: 0; padding-left: 1.2em; display: flex; flex-direction: column; gap: 10px; max-width: 46em; }
ul.tips b { color: var(--navy); }
table { border-collapse: collapse; font-size: 14px; min-width: 420px; }
th, td { border-bottom: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 13px; }
td.num { font-variant-numeric: tabular-nums; white-space: nowrap; }
tr.hl td { background: var(--tint); font-weight: 700; }
.search { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; max-width: 560px; }
.search input { flex: 1 1 220px; min-width: 0; font: inherit; padding: 10px 12px; border: 1px solid var(--input-line); border-radius: 10px; background: var(--input-bg); color: var(--fg); }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 18px; border-radius: 10px; font-weight: 700; font-size: 15px; text-decoration: none; border: none; cursor: pointer; font-family: inherit; }
.btn-y { background: var(--yellow); color: var(--on-yellow); }
.btn-n { background: var(--navy); color: var(--on-navy); }
.btn[aria-disabled="true"] { opacity: .5; pointer-events: none; }
.next { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 20px; display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.next img { width: 64px; height: 64px; border-radius: 50%; flex: none; }
.next div { flex: 1 1 260px; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.pill { align-self: flex-start; font-size: 12px; font-weight: 700; color: var(--on-yellow); background: var(--yellow); padding: 2px 10px; border-radius: 999px; }
.products { display: flex; flex-wrap: wrap; gap: 14px; }
.prod { flex: 1 1 220px; min-width: 0; border: 1px solid var(--line); border-radius: 14px; padding: 14px; display: flex; flex-direction: column; gap: 8px; }
.ph { height: 130px; background: var(--surface); border: 1px dashed var(--line); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 13px; color: var(--muted); }
details { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
summary { font-weight: 700; color: var(--navy); cursor: pointer; }
details p { margin-top: 8px; font-size: 15px; }
.faq { display: flex; flex-direction: column; gap: 10px; max-width: 52em; }
.srcs { font-size: 13px; color: var(--fg); display: flex; flex-direction: column; gap: 6px; max-width: 52em; padding-left: 1.2em; margin: 0; }
footer { background: var(--navy); color: var(--on-navy); }
footer .wrap { padding-block: 28px; display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; align-items: center; }
footer a { color: var(--on-navy); font-size: 14px; padding-block: 8px; }
footer nav { display: flex; flex-wrap: wrap; gap: 0 18px; }
@media (prefers-reduced-motion: no-preference) { .big .v { transition: color .2s; } }

.skip { position: absolute; left: -9999px; top: 0; background: var(--yellow); color: var(--on-yellow); padding: 8px 12px; z-index: 20; }
.skip:focus { left: 8px; top: 8px; }
.prose { max-width: 46em; display: flex; flex-direction: column; gap: 14px; }
.prose h2 { margin-top: 18px; }
.prose ul, .prose ol { margin: 0; padding-left: 1.3em; display: flex; flex-direction: column; gap: 6px; }
.prose dl { margin: 0; display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 8px 16px; }
.prose dt { color: var(--muted); font-size: 14px; }
.prose dd { margin: 0; }
@media (max-width: 480px) { .prose dl { grid-template-columns: minmax(0, 1fr); } .prose dd { margin-bottom: 8px; } }
.hero { background: var(--tint); }
.hero .wrap { padding-block: 48px; display: flex; flex-wrap: wrap; gap: 32px; align-items: center; }
.hero-text { flex: 999 1 460px; min-width: 0; display: flex; flex-direction: column; gap: 16px; }
.hero-text h1 { font-size: clamp(28px, 5vw, 42px); }
.hero-img { flex: 1 1 220px; display: flex; justify-content: center; }
.hero-img img { width: 220px; height: 220px; border-radius: 50%; }
.cards { display: flex; flex-wrap: wrap; gap: 16px; }
.card { flex: 1 1 300px; min-width: 0; border: 1px solid var(--line); border-radius: 16px; padding: 22px; display: flex; flex-direction: column; gap: 10px; text-decoration: none; color: var(--fg); background: var(--bg); }
a.card:hover { border-color: var(--navy); }
.tag { align-self: flex-start; font-size: 12px; font-weight: 700; color: var(--navy); background: var(--tint); padding: 3px 10px; border-radius: 6px; }
.card b { font-size: 18px; color: var(--navy); }
.card .go { font-size: 14px; font-weight: 700; color: var(--navy); }
.card.soon { border-style: dashed; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 14px; border: 1px solid var(--input-line); border-radius: 999px; background: var(--input-bg); color: var(--navy); font-size: 14px; font-weight: 700; cursor: pointer; }
.chip input:checked + span { background: var(--navy); color: var(--on-navy); border-color: var(--navy); }
.chip input:focus-visible + span { outline: 3px solid var(--yellow); outline-offset: 2px; }
.field-label { font-size: 14px; font-weight: 700; }
.place-note { font-size: 14px; color: var(--fg); }
.devlist { display: flex; flex-direction: column; gap: 10px; }
.dev { background: var(--bg); border-radius: 12px; padding: 14px; display: flex; flex-direction: column; gap: 6px; }
.dev b { color: var(--navy); font-size: 16px; }
.dev-nums { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 14px; }
.dev-nums em { font-style: normal; font-weight: 700; font-size: 20px; color: var(--navy); font-variant-numeric: tabular-nums; }
.dev-safe { font-size: 12px; color: var(--muted); line-height: 1.6; }
.acbox p { margin: 0; font-size: 14px; background: var(--bg); border-radius: 12px; padding: 12px 14px; }
.acbox b { font-variant-numeric: tabular-nums; color: var(--navy); }
.tiles.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 460px) { .tiles.two { grid-template-columns: minmax(0, 1fr); } }
.linkbtn { background: none; border: none; padding: 0; color: var(--navy); text-decoration: underline; font: inherit; cursor: pointer; text-align: left; }
.tipwrap > .tips { flex: 1 1 420px; min-width: 0; }

.formula { background: var(--tint); border-radius: 14px; padding: 20px; font-weight: 700; color: var(--navy); }
footer nav a { margin-right: 4px; }

img { max-width: 100%; }
[hidden] { display: none !important; }