/* 洗剤ずかん — スマホを先に。日本語は端末のフォント。空色を基本に、暗い表示にも対応 */
:root {
  --bg: #F4F7FA; --surface: #FDFEFF; --surface-2: #EDF2F6; --ink: #18232E; --muted: #566472; --line: #DCE4EB; --line-strong: #C3CFDA;
  --primary: #1D6AA5; --primary-press: #155585; --on-primary: #F7FBFE; --primary-soft: #E2EEF8; --primary-ink: #17578A;
  --ok: #1F7A63; --ok-soft: #DFF1EA; --bad: #A9452F; --bad-soft: #F7E4DE; --note: #FBF4E2; --note-line: #EAD8A8; --note-ink: #6A5220;
  --ion-anion: #2E6FB0; --ion-nonion: #1E8473; --ion-cation: #8A4FA8; --ion-amphoteric: #A56A12;
  --shadow: 0 1px 2px rgba(20, 40, 60, .06), 0 6px 18px rgba(20, 40, 60, .06);
  --r: 16px; --r-s: 12px; --tab-h: 64px;
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
  color: var(--ink); background: var(--bg);
  -webkit-text-size-adjust: 100%; text-size-adjust: 100%;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F1419; --surface: #172028; --surface-2: #1E2832; --ink: #E3EAF1; --muted: #9AA8B6; --line: #2A3540; --line-strong: #394654;
    --primary: #6FB3E8; --primary-press: #8CC4EE; --on-primary: #0B1620; --primary-soft: #1A2C3B; --primary-ink: #93C8F0;
    --ok: #6CCBAF; --ok-soft: #173029; --bad: #F0937E; --bad-soft: #3A2420; --note: #2A2416; --note-line: #4A3F20; --note-ink: #E6D29E;
    --ion-anion: #7DB1E8; --ion-nonion: #6CCBB7; --ion-cation: #C79BE0; --ion-amphoteric: #E3B062;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 18px rgba(0, 0, 0, .25);
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: 12px; }
body { margin: 0; line-height: 1.75; font-size: 16px; padding-bottom: calc(var(--tab-h) + env(safe-area-inset-bottom)); -webkit-tap-highlight-color: transparent; }
a { color: var(--primary-ink); text-underline-offset: 3px; }
button, input, select { font: inherit; color: inherit; }
h1, h2, h3 { line-height: 1.4; letter-spacing: .01em; }
h1 { font-size: 1.45rem; margin: .4em 0 .3em; }
h2 { font-size: 1.15rem; margin: 1.8em 0 .6em; }
h3 { font-size: 1rem; margin: 1.2em 0 .4em; }
p { margin: .5em 0; }
.wrap { width: 100%; max-width: 780px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.ic { width: 1.1em; height: 1.1em; flex: none; vertical-align: -.18em; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 8px; top: 8px; z-index: 100; background: var(--surface); padding: 8px 12px; border-radius: 8px; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--primary) 50%, transparent); outline-offset: 2px; }

/* PR（上に細く1行） */
.pr { background: var(--surface-2); color: var(--muted); font-size: .75rem; text-align: center; padding: 3px 12px; line-height: 1.5; }
.pr a { color: inherit; }

/* ヘッダー */
.hd { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; }
.hd .wrap { display: flex; align-items: center; gap: 10px; min-height: 54px; }
.logo { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.08rem; color: var(--ink); text-decoration: none; letter-spacing: .02em; }
.logo .mk { width: 30px; height: 30px; border-radius: 9px; background: var(--primary); color: var(--on-primary); display: grid; place-items: center; }
.logo .mk .ic { width: 20px; height: 20px; }
.hd .sp { flex: 1; }
.hd-search { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 12px; color: var(--ink); text-decoration: none; }
.hd-nav { display: none; gap: 4px; }
.hd-nav a { color: var(--ink); text-decoration: none; padding: 8px 10px; border-radius: 10px; font-size: .92rem; }
.hd-nav a:hover { background: var(--surface-2); }
@media (min-width: 860px) { .hd-nav { display: flex; } }

/* 下のタブ（スマホ） */
.tabs { position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; background: var(--surface); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom); }
.tabs ul { display: grid; grid-template-columns: repeat(5, 1fr); list-style: none; margin: 0 auto; padding: 0; max-width: 640px; }
.tabs a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; height: var(--tab-h); font-size: .7rem; color: var(--muted); text-decoration: none; }
.tabs a .ic { width: 24px; height: 24px; padding: 3px; border-radius: 999px; box-sizing: content-box; }
.tabs a[aria-current="page"] { color: var(--primary-ink); font-weight: 700; }
.tabs a[aria-current="page"] .ic { background: var(--primary-soft); }
@media (min-width: 860px) { .tabs { display: none; } body { padding-bottom: 0; } }

/* パンくず */
.crumbs { font-size: .8rem; color: var(--muted); margin: 12px 0 0; display: flex; flex-wrap: wrap; gap: 4px; }
.crumbs a { color: var(--muted); }

/* 入口（トップ） */
.hero { padding: 26px 0 8px; }
.hero h1 { font-size: 1.6rem; margin: 0 0 .25em; }
.hero .lead { color: var(--muted); margin: 0 0 14px; }
.search { position: relative; }
.search input { width: 100%; height: 52px; border-radius: 14px; border: 1.5px solid var(--line-strong); background: var(--surface); padding: 0 14px 0 44px; font-size: 1rem; }
.search input:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 18%, transparent); }
.search > .ic { position: absolute; left: 14px; top: 16px; width: 20px; height: 20px; color: var(--muted); }
.sugg { list-style: none; margin: 6px 0 0; padding: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; }
.sugg:empty { display: none; }
.sugg a { display: flex; gap: 10px; align-items: center; padding: 10px 14px; text-decoration: none; color: var(--ink); border-top: 1px solid var(--line); }
.sugg li:first-child a { border-top: 0; }
.sugg a:hover, .sugg a[aria-selected="true"] { background: var(--surface-2); }
.sugg .b { font-size: .78rem; color: var(--muted); display: block; }
.stats { display: flex; gap: 18px; margin: 14px 0 0; font-size: .85rem; color: var(--muted); flex-wrap: wrap; }
.stats b { color: var(--ink); font-size: 1.15rem; margin-right: 2px; }

.doors { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 18px 0; }
.door { display: flex; flex-direction: column; gap: 4px; padding: 14px; border-radius: var(--r); background: var(--surface); border: 1px solid var(--line); text-decoration: none; color: var(--ink); box-shadow: var(--shadow); min-height: 112px; }
.door .ic { width: 28px; height: 28px; color: var(--primary); }
.door b { font-size: .98rem; }
.door span { font-size: .8rem; color: var(--muted); line-height: 1.5; }
@media (min-width: 640px) { .doors { grid-template-columns: repeat(4, 1fr); } }

/* チップ・印 */
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
.chip { display: inline-flex; align-items: center; gap: 4px; border-radius: 999px; padding: 3px 10px; font-size: .8rem; background: var(--surface-2); color: var(--ink); border: 1px solid var(--line); text-decoration: none; white-space: nowrap; }
a.chip:hover { border-color: var(--line-strong); }
.chip.none { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.chip.has { background: var(--surface-2); color: var(--muted); }
.chip.ion { border-color: transparent; color: var(--surface); font-weight: 600; }
.ion-anion { background: var(--ion-anion) !important; }
.ion-nonion { background: var(--ion-nonion) !important; }
.ion-cation { background: var(--ion-cation) !important; }
.ion-amphoteric { background: var(--ion-amphoteric) !important; }
.scroll-x { display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; padding: 2px 0 8px; margin: 0 -16px; padding-left: 16px; padding-right: 16px; }
.scroll-x::-webkit-scrollbar { display: none; }

/* カード・行 */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 16px; box-shadow: var(--shadow); margin: 12px 0; }
.rows { list-style: none; margin: 8px 0; padding: 0; display: grid; gap: 8px; }
.row { display: grid; grid-template-columns: 64px 1fr; gap: 12px; align-items: start; padding: 12px; border-radius: var(--r-s); background: var(--surface); border: 1px solid var(--line); }
.row a.nm { color: var(--ink); text-decoration: none; font-weight: 700; line-height: 1.45; display: block; }
.row a.nm:hover { text-decoration: underline; }
.row .br { font-size: .78rem; color: var(--muted); }
.thumb { width: 64px; height: 64px; border-radius: 10px; background: var(--surface-2); display: grid; place-items: center; overflow: hidden; color: var(--muted); }
.thumb img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.thumb .ic { width: 28px; height: 28px; }
.meter { display: flex; align-items: center; gap: 8px; font-size: .8rem; color: var(--muted); margin-top: 4px; }
.meter .bar { flex: 1; max-width: 180px; height: 8px; border-radius: 999px; background: var(--surface-2); position: relative; overflow: hidden; }
.meter .bar i { position: absolute; left: 0; top: 0; bottom: 0; background: var(--primary); border-radius: 999px; }
.meter b { color: var(--ink); }

/* 一覧のタイル */
.tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 10px 0; }
.tile { display: block; padding: 12px 14px; border-radius: var(--r-s); background: var(--surface); border: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.tile b { display: block; font-size: .92rem; line-height: 1.45; }
.tile span { font-size: .78rem; color: var(--muted); }
@media (min-width: 640px) { .tiles { grid-template-columns: repeat(3, 1fr); } }

/* 商品ページ */
.p-head { display: grid; grid-template-columns: 112px 1fr; gap: 14px; align-items: start; margin: 14px 0 6px; }
.p-head .thumb { width: 112px; height: 112px; border-radius: 14px; }
.p-head h1 { font-size: 1.25rem; margin: 0 0 4px; }
.p-head .mk { font-size: .85rem; color: var(--muted); }
.buy { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 8px; margin: 12px 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 46px; padding: 0 16px; border-radius: 12px; border: 1.5px solid var(--line-strong); background: var(--surface); color: var(--ink); font-weight: 700; text-decoration: none; cursor: pointer; }
.btn.primary { background: var(--primary); color: var(--on-primary); border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-press); }
.btn.small { min-height: 36px; padding: 0 12px; font-size: .85rem; border-radius: 10px; }
.btn.rakuten { border-color: #BF0000; color: #BF0000; }
.btn.amazon { border-color: #C77700; color: #9A5B00; }
.btn.yahoo { border-color: #FF0033; color: #D0002A; }
@media (prefers-color-scheme: dark) { .btn.rakuten { color: #FF8A8A; border-color: #FF8A8A; } .btn.amazon { color: #FFC266; border-color: #FFC266; } .btn.yahoo { color: #FF8AA0; border-color: #FF8AA0; } }
.kv { display: grid; grid-template-columns: 7.5em 1fr; gap: 0; margin: 8px 0; border-top: 1px solid var(--line); }
.kv dt, .kv dd { margin: 0; padding: 10px 4px; border-bottom: 1px solid var(--line); }
.kv dt { color: var(--muted); font-size: .85rem; }
.kv dd { font-size: .95rem; overflow-wrap: anywhere; }
@media (max-width: 420px) { .kv { grid-template-columns: 1fr; } .kv dt { border-bottom: 0; padding-bottom: 0; } }
.surfbar { display: flex; height: 14px; border-radius: 999px; overflow: hidden; background: var(--surface-2); margin: 10px 0 4px; }
.surfbar i { display: block; height: 100%; }
.range { position: relative; height: 34px; margin: 10px 0 2px; }
.range .track { position: absolute; left: 0; right: 0; top: 14px; height: 6px; border-radius: 999px; background: var(--surface-2); }
.range .iqr { position: absolute; top: 14px; height: 6px; background: var(--primary-soft); }
.range .pin { position: absolute; top: 6px; width: 4px; height: 22px; border-radius: 2px; background: var(--primary); transform: translateX(-2px); }
.range-lbl { display: flex; justify-content: space-between; font-size: .75rem; color: var(--muted); }
.flags { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin: 8px 0; }
.flag { display: flex; align-items: center; gap: 8px; padding: 9px 12px; border-radius: 10px; background: var(--surface-2); font-size: .9rem; }
.flag.no { background: var(--ok-soft); color: var(--ok); }
.flag .ic { width: 18px; height: 18px; }
.note { background: var(--note); border: 1px solid var(--note-line); color: var(--note-ink); border-radius: var(--r-s); padding: 10px 14px; font-size: .88rem; margin: 12px 0; }
.src { font-size: .8rem; color: var(--muted); }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }

/* 条件で探す・比べる・原因さがし */
.filters { display: grid; gap: 14px; }
.fgroup h3 { margin: 0 0 6px; font-size: .9rem; color: var(--muted); }
.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg label { position: relative; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span { display: inline-flex; align-items: center; gap: 4px; min-height: 38px; padding: 0 14px; border-radius: 999px; border: 1.5px solid var(--line-strong); background: var(--surface); font-size: .88rem; cursor: pointer; }
.seg input:checked + span { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }
.seg input:focus-visible + span { outline: 3px solid color-mix(in srgb, var(--primary) 50%, transparent); outline-offset: 2px; }
.count-bar { position: sticky; bottom: calc(var(--tab-h) + env(safe-area-inset-bottom)); z-index: 10; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(6px); padding: 10px 0; display: flex; justify-content: space-between; align-items: center; gap: 10px; border-top: 1px solid var(--line); }
@media (min-width: 860px) { .count-bar { bottom: 0; } }
.cmp { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(220px, 1fr); gap: 10px; overflow-x: auto; padding-bottom: 8px; }
.cmp .card { margin: 0; }
.cmp dl { margin: 6px 0 0; }
.cmp dt { font-size: .75rem; color: var(--muted); margin-top: 8px; }
.cmp dd { margin: 0; font-size: .9rem; }
.picked { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0; }
.picked .chip { padding-right: 4px; white-space: normal; max-width: 100%; text-align: left; }
details.full { margin: 10px 0; }
details.full summary { cursor: pointer; font-weight: 700; padding: 10px 0; }
.picked button { border: 0; background: transparent; cursor: pointer; padding: 2px 4px; border-radius: 999px; }
.cause-res li { margin: 6px 0; }
.empty { text-align: center; color: var(--muted); padding: 24px 8px; }

/* 記事 */
.article { font-size: 1rem; }
.article h2 { padding-left: 10px; border-left: 4px solid var(--primary); }
.toc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-s); padding: 10px 16px; font-size: .9rem; }

/* フッター */
.ft { margin-top: 48px; padding: 24px 0 32px; border-top: 1px solid var(--line); background: var(--surface); font-size: .82rem; color: var(--muted); }
.ft nav { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-bottom: 12px; }
.ft a { color: var(--muted); }
.ft p { margin: 6px 0; line-height: 1.6; }

@media (prefers-reduced-motion: no-preference) {
  .door, .tile, .row { transition: transform .15s ease, border-color .15s ease; }
  .door:active, .tile:active { transform: scale(.98); }
}
.logo .lt { display: flex; flex-direction: column; line-height: 1.15; }
.logo .ln { font-weight: 800; font-size: 1.12rem; letter-spacing: .04em; }
.logo .tg { font-weight: 500; font-size: .68rem; color: var(--muted); letter-spacing: .02em; }
/* 長い会社名・商品名で横にはみ出さないように */
.row > div { min-width: 0; }
.row a.nm, .row .br, .p-head h1, .p-head .mk { overflow-wrap: anywhere; }
.chips { min-width: 0; }
.chip { max-width: 100%; overflow: hidden; text-overflow: ellipsis; }
.chip.ion { white-space: normal; overflow-wrap: anywhere; border-radius: 12px; } /* 長い界面活性剤の名前は切らずに折り返す */
.pw { font-size: .8rem; margin-top: 4px; color: var(--ink); }
.pw .muted { font-size: .72rem; }
.door.main { grid-column: 1 / -1; min-height: 0; flex-direction: row; align-items: center; gap: 12px; background: var(--primary); color: var(--on-primary); border-color: var(--primary); }
.door.main .ic { color: var(--on-primary); width: 34px; height: 34px; }
.door.main span { color: color-mix(in srgb, var(--on-primary) 85%, transparent); }
.door.main b { font-size: 1.05rem; display: block; }
/* 質問 */
.quiz { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 16px; box-shadow: var(--shadow); }
.quiz .prog { display: flex; gap: 6px; margin-bottom: 12px; }
.quiz .prog i { flex: 1; height: 5px; border-radius: 999px; background: var(--surface-2); }
.quiz .prog i.on { background: var(--primary); }
.quiz h2 { margin: 0 0 4px; font-size: 1.15rem; }
.quiz .opts { display: grid; gap: 8px; margin: 14px 0; }
.quiz .opt { display: flex; align-items: center; gap: 10px; min-height: 52px; padding: 10px 14px; border-radius: 12px; border: 1.5px solid var(--line-strong); background: var(--surface); text-align: left; cursor: pointer; font-size: .95rem; }
.quiz .opt .ic { width: 22px; height: 22px; color: var(--primary); }
.quiz .opt[aria-pressed="true"] { border-color: var(--primary); background: var(--primary-soft); font-weight: 700; }
.quiz .opt small { display: block; color: var(--muted); font-weight: 400; font-size: .78rem; }
.quiz .nav { display: flex; justify-content: space-between; gap: 8px; }
.why { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.why span { font-size: .72rem; padding: 2px 8px; border-radius: 999px; background: var(--ok-soft); color: var(--ok); }
.answers { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 12px; }
table.vs { width: 100%; border-collapse: collapse; font-size: .85rem; margin: 12px 0; background: var(--surface); border-radius: var(--r-s); overflow: hidden; table-layout: fixed; }
table.vs th, table.vs td { border-bottom: 1px solid var(--line); padding: 9px 8px; text-align: left; vertical-align: top; overflow-wrap: anywhere; }
table.vs thead th { background: var(--primary-soft); color: var(--primary-ink); font-size: .95rem; }
table.vs tbody th { color: var(--muted); font-weight: 500; width: 28%; font-size: .78rem; }
/* トップ：イラストつき */
.hero { display: grid; grid-template-columns: 1fr; gap: 6px; }
.hero-i { order: -1; display: flex; justify-content: center; }
.hero-i .ill { width: 180px; height: 180px; }
.hero .search, .hero .stats { grid-column: 1 / -1; }
@media (min-width: 720px) { .hero { grid-template-columns: 1fr 240px; align-items: center; } .hero-i { order: 0; } .hero-i .ill { width: 240px; height: 240px; } }
.ill { display: block; object-fit: contain; border-radius: 12px; }
.door .ill { width: 76px; height: 76px; margin: -4px 0 2px -4px; }
.door.main .ill { width: 92px; height: 92px; background: #fff; border-radius: 14px; margin: 0; flex: none; }
.door.main .dt { display: flex; flex-direction: column; gap: 4px; }
.tile .ill { width: 88px; height: 88px; margin: 0 auto 4px; }
.tiles.cats .tile { text-align: center; }
.t3 { display: flex; gap: 4px; margin-bottom: 8px; }
.t3 img { width: 40px; height: 40px; object-fit: contain; background: #fff; border-radius: 8px; border: 1px solid var(--line); }
/* 質問の選択肢のイラスト */
.quiz .opt img.ill { width: 56px; height: 56px; flex: none; border-radius: 10px; }
.quiz .opts.has-img { grid-template-columns: 1fr; }
.article .lead { font-size: 1.02rem; color: var(--ink); }
.points { background: var(--primary-soft); border-radius: var(--r-s); padding: 12px 16px; margin: 14px 0; }
.points b { display: flex; align-items: center; gap: 6px; color: var(--primary-ink); }
.points ul { margin: 6px 0 0; padding-left: 1.2em; }
sup.ref { font-size: .62rem; color: var(--muted); margin-left: 1px; }
.tiles.guides .tile b { font-size: .9rem; }
/* 商品ページの最初の画面の「1回あたり」 */
.pw-top { font-size: .9rem; margin: 2px 0 0; }
.pw-top b { font-size: 1.05rem; }
/* PR枠（data/pr.json）と、広告で上げた商品の印 */
.prcards { display: grid; gap: 10px; margin: 14px 0; }
.prcard a { display: block; padding: 12px; border-radius: var(--r-s); background: var(--surface); border: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.prcard a.has-img { display: grid; grid-template-columns: 64px 1fr; gap: 12px; align-items: center; }
.prcard img { width: 64px; height: 64px; object-fit: contain; border-radius: 10px; background: #fff; }
.prcard .prt { display: block; min-width: 0; }
.prcard .prt b { display: block; line-height: 1.45; overflow-wrap: anywhere; }
.prcard .prt > span:not(.prmark) { display: block; font-size: .8rem; color: var(--muted); }
.prmark { display: inline-block; font-size: .68rem; font-weight: 700; letter-spacing: .04em; line-height: 1.5; padding: 0 6px; margin-bottom: 2px; border-radius: 4px; border: 1px solid var(--muted); color: var(--muted); }