/* 露天風呂パートナー
   石の灰と墨色を基調に、差し色は湯の青緑。写真が主役なので装飾は控えめに。 */
:root {
  --ink: #2b3431;
  --ink-2: #4d5753;
  --stone: #8b8f86;
  --line: #ddd8cd;
  --paper: #f7f5ef;
  --white: #fff;
  --yu: #2f7a73;       /* 湯の青緑：ボタン・リンク */
  --yu-dark: #235e58;
  --yu-pale: #e6f0ee;
  --warm: #9a6a3f;     /* 木の色：見出しの小さな飾り */
  --ng: #a4472f;
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI", "Meiryo", system-ui, sans-serif;
  --wrap: 1040px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.9; -webkit-text-size-adjust: 100%; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--yu); }
strong { font-weight: 700; }
h1, h2, h3 { font-family: var(--serif); font-weight: 700; line-height: 1.45; letter-spacing: .02em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }

/* ---------- ヘッダー ---------- */
.hd { position: sticky; top: 0; z-index: 20; background: rgba(247,245,239,.96); border-bottom: 1px solid var(--line); backdrop-filter: saturate(1.2) blur(6px); }
.hd-in { max-width: var(--wrap); margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.logo { display: flex; align-items: center; gap: 10px; font-family: var(--serif); font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; letter-spacing: .05em; }
.logo-mark { width: 26px; height: 26px; border-radius: 50% 46% 52% 44%; background: radial-gradient(circle at 35% 35%, #b9bcb3, #6f746b); box-shadow: inset 0 -6px 0 rgba(47,122,115,.55); }
.hd-cta { background: var(--yu); color: #fff; text-decoration: none; font-weight: 700; font-size: .9rem; padding: 8px 14px; border-radius: 999px; white-space: nowrap; }
.gnav { max-width: var(--wrap); margin: 0 auto; padding: 0 16px 8px; display: flex; gap: 18px; overflow-x: auto; font-size: .88rem; scrollbar-width: none; }
.gnav::-webkit-scrollbar { display: none; }
.gnav a { color: var(--ink-2); text-decoration: none; white-space: nowrap; padding: 2px 0; }
.gnav a[aria-current] { color: var(--ink); border-bottom: 2px solid var(--yu); }
.crumbs { max-width: var(--wrap); margin: 0 auto; padding: 12px 16px 0; font-size: .8rem; color: var(--stone); }
.crumbs a { color: var(--stone); }

/* ---------- ファーストビュー ---------- */
.hero { position: relative; background: var(--ink); color: #fff; overflow: hidden; }
.hero img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; opacity: .62; }
.hero-in { position: relative; max-width: var(--wrap); margin: 0 auto; padding: 96px 16px 72px; }
.hero .kicker { color: #d9e8e5; }
.hero h1 { font-size: clamp(1.9rem, 5.4vw, 3.1rem); margin: 8px 0 16px; text-shadow: 0 2px 16px rgba(0,0,0,.35); }
.hero p.lead { max-width: 34em; font-size: 1.05rem; text-shadow: 0 1px 8px rgba(0,0,0,.4); }
.hero .btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.hero-small .hero-in { padding: 64px 16px 48px; }
.hero-small h1 { font-size: clamp(1.6rem, 4.6vw, 2.5rem); }

.kicker { font-size: .85rem; letter-spacing: .12em; color: var(--warm); font-weight: 700; margin: 0; }

/* ---------- ボタン ---------- */
.btn { display: inline-block; text-decoration: none; font-weight: 700; padding: 14px 26px; border-radius: 999px; border: 0; cursor: pointer; font-size: 1rem; font-family: var(--sans); line-height: 1.4; text-align: center; }
.btn-main { background: var(--yu); color: #fff; box-shadow: 0 4px 0 var(--yu-dark); }
.btn-main:hover { background: var(--yu-dark); }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.7); }
.btn-line { background: #fff; color: var(--yu); border: 1px solid var(--yu); }

/* ---------- セクション ---------- */
.sec { padding: 64px 0; }
.sec.alt { background: var(--white); }
.h2 { font-size: clamp(1.45rem, 3.6vw, 2rem); margin: 6px 0 20px; }
.h2::after { content: ""; display: block; width: 40px; height: 3px; background: var(--warm); margin-top: 14px; }
.h3 { font-size: 1.2rem; margin: 28px 0 8px; }
.sec p { margin: 0 0 1em; }

.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 760px) { .g2, .g3 { grid-template-columns: 1fr; } }

.card { background: var(--white); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.sec.alt .card { background: var(--paper); }
.card img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.card .cb { padding: 16px 18px 18px; }
.card h3 { font-size: 1.08rem; margin: 0 0 6px; }
.card p { font-size: .95rem; margin: 0; }

.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: 36px; align-items: center; }
.split.rev > :first-child { order: 2; }
.split img { border-radius: 10px; }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; gap: 20px; } .split.rev > :first-child { order: 0; } }

.photos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.photos img { aspect-ratio: 1 / 1; object-fit: cover; border-radius: 6px; width: 100%; }
@media (max-width: 760px) { .photos { grid-template-columns: repeat(2, 1fr); } }
.cap { font-size: .8rem; color: var(--stone); margin-top: 8px; }

/* ---------- 表 ---------- */
.tbl-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 16px 0; }
table.tbl { border-collapse: collapse; width: 100%; min-width: 640px; background: var(--white); font-size: .93rem; }
.tbl th, .tbl td { border: 1px solid var(--line); padding: 10px 12px; vertical-align: top; text-align: left; }
.tbl thead th { background: var(--ink); color: #fff; font-weight: 700; }
.tbl tbody th { background: #f0ede4; white-space: nowrap; }
.tbl .hl { background: var(--yu-pale); }

/* ---------- リスト ---------- */
.checks { list-style: none; padding: 0; margin: 0 0 1em; }
.checks li { position: relative; padding-left: 1.7em; margin: .4em 0; }
.checks li::before { content: ""; position: absolute; left: .2em; top: .62em; width: .7em; height: .38em; border-left: 2px solid var(--yu); border-bottom: 2px solid var(--yu); transform: rotate(-45deg); }
.checks.ng li::before { border: 0; width: .8em; height: 2px; background: var(--ng); transform: none; top: .9em; }

.fit { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.fit > div { background: var(--white); border-radius: 10px; padding: 20px; border-top: 4px solid var(--yu); }
.fit > div.no { border-top-color: var(--ng); }
.fit h3 { margin: 0 0 10px; font-size: 1.1rem; }
@media (max-width: 760px) { .fit { grid-template-columns: 1fr; } }

.steps-list { counter-reset: s; list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.steps-list li { counter-increment: s; background: var(--white); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px 16px 64px; position: relative; }
.steps-list li::before { content: counter(s); position: absolute; left: 18px; top: 16px; width: 32px; height: 32px; border-radius: 50%; background: var(--ink); color: #fff; font-family: var(--serif); display: grid; place-items: center; }
.steps-list strong { display: block; }

.note-box { background: var(--yu-pale); border-left: 4px solid var(--yu); padding: 14px 18px; border-radius: 0 8px 8px 0; margin: 20px 0; font-size: .95rem; }
.note-box p:last-child { margin: 0; }
.todo { color: var(--stone); font-size: .9rem; }

/* ---------- よくある質問 ---------- */
.faq details { background: var(--white); border: 1px solid var(--line); border-radius: 8px; margin: 0 0 10px; }
.faq summary { cursor: pointer; padding: 14px 44px 14px 18px; font-weight: 700; position: relative; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; position: absolute; right: 16px; top: 13px; color: var(--yu); }
.faq details[open] summary::after { content: "－"; }
.faq details > div { padding: 0 18px 14px; }

/* ---------- 誘導の帯 ---------- */
.cta-band { background: var(--ink); color: #fff; border-radius: 12px; padding: 24px; margin: 36px 0; display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.cta-band p { margin: 0; flex: 1 1 280px; }

/* ---------- 読みもの ---------- */
.article { background: var(--white); }
.article .wrap { max-width: 760px; padding-top: 32px; padding-bottom: 48px; }
.article h1 { font-size: clamp(1.6rem, 4.4vw, 2.2rem); margin: 8px 0 18px; }
.article h2 { font-size: 1.4rem; margin: 44px 0 14px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.article h3 { font-size: 1.12rem; margin: 28px 0 8px; }
.article .eyecatch { border-radius: 10px; margin: 0 0 24px; aspect-ratio: 16 / 9; object-fit: cover; width: 100%; }
.toc { background: var(--paper); border-radius: 10px; padding: 16px 20px; margin: 0 0 28px; font-size: .95rem; }
.toc strong { display: block; margin-bottom: 4px; }
.toc ul { margin: 0; padding-left: 1.2em; }

.col-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.col-list a { display: grid; grid-template-columns: 160px 1fr; gap: 16px; background: var(--white); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; text-decoration: none; color: var(--ink); }
.col-list img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3; }
.col-list span { padding: 12px 14px 12px 0; display: flex; flex-direction: column; gap: 4px; }
.col-list small { color: var(--ink-2); font-size: .86rem; line-height: 1.7; }
@media (max-width: 560px) { .col-list a { grid-template-columns: 110px 1fr; gap: 12px; } }

/* ---------- フォーム ---------- */
.form-sec { background: var(--white); border-top: 1px solid var(--line); }
.lead-form { margin-top: 24px; display: grid; gap: 18px; }
.lead-form fieldset { border: 0; margin: 0; padding: 0; }
.lead-form legend, .fld { font-weight: 700; font-size: .95rem; }
.fld { display: grid; gap: 6px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .row2 { grid-template-columns: 1fr; } }
.req, .opt-tag { font-size: .72rem; font-weight: 700; margin-left: 8px; padding: 1px 7px; border-radius: 4px; vertical-align: 2px; }
.req { background: var(--ng); color: #fff; }
.opt-tag { background: #ebe7dd; color: var(--ink-2); }
.lead-form input[type=text], .lead-form input[type=email], .lead-form input[type=tel], .lead-form select, .lead-form textarea {
  width: 100%; font: inherit; font-weight: 400; padding: 12px 12px; border: 1px solid #c9c3b6; border-radius: 8px; background: #fff; color: var(--ink); }
.lead-form input:focus, .lead-form select:focus, .lead-form textarea:focus { outline: 2px solid var(--yu); outline-offset: 1px; }
.radios { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-top: 8px; }
@media (max-width: 560px) { .radios { grid-template-columns: 1fr; } }
.radios label { display: flex; align-items: center; gap: 8px; font-weight: 400; border: 1px solid #c9c3b6; border-radius: 8px; padding: 10px 12px; background: #fff; cursor: pointer; }
.radios label.on { border-color: var(--yu); background: var(--yu-pale); }
.agree { display: flex; gap: 10px; align-items: flex-start; font-size: .9rem; }
.agree input { margin-top: .45em; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; }
.err { display: none; color: var(--ng); font-weight: 700; margin: 0; }
.err.show { display: block; }
.lead-form .btn-main { width: 100%; font-size: 1.08rem; padding: 16px; }
.note { font-size: .85rem; color: var(--ink-2); margin: 0; }

/* ---------- フッター ---------- */
.ft { background: var(--ink); color: #d6dbd8; padding: 40px 0 96px; font-size: .9rem; }
.ft-in { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
.ft-name { font-family: var(--serif); font-size: 1.15rem; color: #fff; margin: 0 0 6px; }
.ft-nav { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 18px 0; }
.ft-nav a { color: #d6dbd8; }
.ft-copy { font-size: .8rem; color: #9aa39f; margin: 0; }

.float-cta { position: fixed; right: 16px; bottom: 16px; z-index: 30; background: var(--yu); color: #fff; text-decoration: none; font-weight: 700; padding: 12px 20px; border-radius: 999px; box-shadow: 0 6px 18px rgba(0,0,0,.2); }
@media (min-width: 761px) { .float-cta { display: none; } }

/* ---------- 置く場所：天然石の向き不向き ---------- */
.fit-box { border-radius: 10px; padding: 14px 18px; margin: 0 0 24px; border-left: 5px solid; background: var(--paper); }
.fit-box p { margin: 0; }
.fit-box .fit-label { font-size: .9rem; margin-bottom: 4px; }
.fit-good { border-color: var(--yu); } .fit-ok { border-color: #8a9a4a; } .fit-hard { border-color: var(--warm); } .fit-no { border-color: var(--ng); }
.fit-tag { display: inline-block; font-size: .78rem; font-weight: 700; color: #fff; padding: 2px 10px; border-radius: 999px; }
.fit-tag.fit-good { background: var(--yu); } .fit-tag.fit-ok { background: #7a8a3c; } .fit-tag.fit-hard { background: var(--warm); } .fit-tag.fit-no { background: var(--ng); }
.basho-card { text-decoration: none; color: var(--ink); display: block; }
.basho-card:hover { border-color: var(--yu); }
.basho-card p { margin: 6px 0 0; }