/* 数字のミカタ 計算ツール。スマホを基準にし、色は YouTube「数字のミカタ」と同じ（remotion/src/theme.ts） */
:root {
  --navy: #1d2b4f;
  --ink: #24324f;
  --sub: #5b6b88;
  --blue: #2f6fed;
  --orange: #ff7a1a;
  --orange-ink: #c2410c;
  --yellow: #ffd400;
  --cream: #fff6e5;
  --bg: #fbfaf7;
  --card: #ffffff;
  --line: #e4e1d8;
  --bar: #c9d6f2;
  --radius: 14px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  overflow-wrap: anywhere;
}
a { color: var(--blue); }
h1 { font-size: 1.55rem; line-height: 1.4; margin: 0.4em 0 0.3em; color: var(--navy); }
h2 { font-size: 1.2rem; margin: 2em 0 0.5em; padding-left: 0.6em; border-left: 5px solid var(--orange); color: var(--navy); line-height: 1.4; }
h3 { font-size: 1.02rem; margin: 1.4em 0 0.3em; color: var(--navy); }

.site-header { background: var(--navy); padding: 10px 16px; }
.brand { display: flex; align-items: center; gap: 8px; color: #fff; text-decoration: none; max-width: 760px; margin: 0 auto; }
.brand-mark { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 8px; background: var(--yellow); color: var(--navy); font-weight: 800; }
.brand-name { font-weight: 800; font-size: 1.05rem; }
.brand-tag { font-size: 0.78rem; opacity: 0.8; }
.crumbs { max-width: 760px; margin: 0 auto; padding: 8px 16px 0; font-size: 0.82rem; color: var(--sub); }
.crumbs a { color: var(--sub); }
.wrap { max-width: 760px; margin: 0 auto; padding: 4px 16px 40px; }

.lead { margin: 0 0 4px; }
.meta { font-size: 0.8rem; color: var(--sub); margin: 0 0 14px; }
.small { font-size: 0.85rem; color: var(--sub); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin: 14px 0; box-shadow: 0 1px 2px rgb(29 43 79 / 6%); }

/* 入力 */
.field { display: block; border: 0; margin: 0 0 16px; padding: 0; }
.field > span:first-child, .field legend { display: block; font-weight: 700; margin-bottom: 6px; color: var(--navy); }
.field small { display: block; color: var(--sub); font-size: 0.82rem; margin-top: 4px; line-height: 1.5; }
.num { display: flex; align-items: center; gap: 8px; }
input[type="number"], select {
  width: 100%;
  min-height: 48px;
  font: inherit;
  font-size: 1.15rem;
  padding: 8px 12px;
  border: 2px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
}
select { font-size: 1rem; }
input[type="number"]:focus, select:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgb(47 111 237 / 18%); }
.unit { flex: none; font-weight: 700; }
.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg label { flex: 1 1 0; min-width: 84px; }
.seg-col { flex-direction: column; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span { display: flex; align-items: center; justify-content: center; text-align: center; min-height: 46px; padding: 8px 10px; border: 2px solid var(--line); border-radius: 10px; background: #fff; cursor: pointer; line-height: 1.4; }
.seg-col span { justify-content: flex-start; text-align: left; }
.seg input:checked + span { border-color: var(--blue); background: #eef3ff; color: var(--navy); font-weight: 700; }
.seg input:focus-visible + span { box-shadow: 0 0 0 3px rgb(47 111 237 / 25%); }
.check { display: flex; gap: 10px; align-items: flex-start; margin: 0 0 16px; font-size: 0.92rem; line-height: 1.5; cursor: pointer; }
.check input { width: 22px; height: 22px; flex: none; margin-top: 1px; accent-color: var(--blue); }
.check[hidden] { display: none; }
.btn { display: block; width: 100%; min-height: 52px; border: 0; border-radius: 12px; background: #d9480f; color: #fff; font: inherit; font-size: 1.2rem; font-weight: 800; cursor: pointer; }
.btn:active { transform: translateY(1px); }

/* 結果 */
.result { border: 2px solid var(--navy); scroll-margin-top: 12px; }
.r-label { margin: 0; font-weight: 700; color: var(--sub); }
.r-big { margin: 0; font-size: 1.3rem; font-weight: 800; color: var(--navy); line-height: 1.3; }
.r-big strong { font-size: 2.8rem; color: var(--orange-ink); letter-spacing: -0.01em; }
.r-big-sm { font-size: 1.4rem; }
.r-sub { margin: 6px 0 12px; font-weight: 600; }
.r-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 0 0 6px; }
.r-grid div { background: var(--cream); border-radius: 10px; padding: 8px 10px; }
.r-grid div[hidden] { display: none; }
#r-age-box, #r-support-box { grid-column: 1 / -1; }
.r-grid dt { font-size: 0.78rem; color: var(--sub); line-height: 1.4; }
.r-grid dd { margin: 2px 0 0; font-weight: 800; color: var(--navy); line-height: 1.4; }
.r-h { margin-top: 18px; }
.r-grid .wide { grid-column: 1 / -1; }
.r-warn { margin: 0 0 12px; padding: 8px 10px; border-radius: 10px; background: #fff1e6; border-left: 4px solid var(--orange); font-size: 0.9rem; line-height: 1.6; }
.r-warn[hidden] { display: none; }
.chart svg { display: block; width: 100%; height: auto; font-size: 10px; fill: var(--sub); }
.chart .g { stroke: var(--line); stroke-width: 1; }
.chart .ln { fill: none; stroke: var(--blue); stroke-width: 2.5; stroke-linejoin: round; }
.chart .dot { fill: var(--orange); stroke: #fff; stroke-width: 2; }
.dot-key { color: var(--orange); }
.walls { padding-left: 1.2em; margin: 6px 0 0; font-size: 0.92rem; }
.walls li { margin: 0.35em 0; }
.walls strong { color: var(--orange-ink); }
.steps { padding-left: 1.3em; margin: 0; }
.bars { list-style: none; padding: 0; margin: 6px 0; font-size: 0.82rem; }
.bars li { display: grid; grid-template-columns: 7.6em 1fr 3.8em; align-items: center; gap: 6px; padding: 1px 4px; border-radius: 6px; }
.b-label { white-space: nowrap; color: var(--sub); }
.b-bar { background: #f1efe9; border-radius: 4px; height: 12px; overflow: hidden; }
.b-bar span { display: block; height: 100%; background: var(--bar); border-radius: 4px; }
.b-val { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.bars li.on { background: #fff1e6; font-weight: 800; }
.bars li.on .b-label, .bars li.on .b-val { color: var(--orange-ink); }
.bars li.on .b-bar span { background: var(--orange); }

.share { border-top: 1px dashed var(--line); margin-top: 14px; padding-top: 10px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.share-label { width: 100%; margin: 0; font-size: 0.82rem; color: var(--sub); }
.btn-share { display: inline-flex; align-items: center; min-height: 40px; padding: 0 12px; border: 1px solid var(--line); border-radius: 999px; background: #fff; color: var(--ink); font: inherit; font-size: 0.88rem; text-decoration: none; cursor: pointer; }

/* 解説 */
.explain ul, .explain ol { padding-left: 1.3em; }
.explain li { margin: 0.3em 0; }
.table-wrap { overflow-x: auto; margin: 10px 0; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; font-size: 0.85rem; min-width: 520px; width: 100%; background: #fff; }
caption { text-align: left; font-weight: 700; padding: 4px 0; color: var(--navy); }
th, td { border: 1px solid var(--line); padding: 6px 8px; text-align: center; white-space: nowrap; }
thead th, tbody th { background: var(--cream); }
.sources ul { padding-left: 1.2em; font-size: 0.9rem; }
.tool-list { list-style: none; padding: 0; display: grid; gap: 10px; }
.tool-list a { display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; text-decoration: none; color: var(--ink); }
.tool-list strong { display: block; color: var(--navy); font-size: 1.05rem; }
.tool-list span { display: block; font-size: 0.88rem; color: var(--sub); line-height: 1.5; }
.tool-list em { display: inline-block; margin-top: 6px; font-style: normal; font-size: 0.75rem; background: var(--cream); padding: 1px 8px; border-radius: 999px; color: var(--orange-ink); }
.tool-list-big a { border-left: 5px solid var(--orange); }
.yt { margin: 24px 0 0; padding: 14px 16px; border-radius: var(--radius); background: var(--navy); color: #fff; }
.yt p { margin: 0 0 6px; }
.yt a { color: var(--yellow); font-weight: 700; }
.hero { padding: 10px 0 4px; }
.hero h1 { font-size: 1.7rem; }
.hl { background: linear-gradient(transparent 62%, var(--yellow) 62%); }
.info { display: grid; grid-template-columns: 6em 1fr; gap: 6px 10px; }
.info dt { font-weight: 700; color: var(--navy); }
.info dd { margin: 0; }
.contact-box { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; }

.site-footer { background: #f1efe9; padding: 18px 16px 28px; text-align: center; }
.site-footer nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 16px; max-width: 760px; margin: 0 auto; }
.site-footer nav a { color: var(--ink); font-size: 0.88rem; min-height: 32px; display: inline-flex; align-items: center; }
.foot-note { font-size: 0.78rem; color: var(--sub); margin: 8px 0 0; }

@media (min-width: 640px) {
  h1 { font-size: 1.85rem; }
  .card { padding: 22px; }
  .r-grid { grid-template-columns: repeat(2, 1fr); }
  .tool-list-big { grid-template-columns: 1fr 1fr; }
}