@charset "utf-8";

/* ===========================================================
   ナチュラフ株式会社 コーポレートサイト
   外部依存なし（Webフォント・JSライブラリ・ビルド不要）
   =========================================================== */

:root {
  --ink:        #0E1C24;
  --ink-soft:   #4A6270;
  --ink-faint:  #8AA0AB;
  --line:       #DFE9E4;
  --bg:         #FFFFFF;
  --bg-soft:    #F1F7F3;
  --bg-deep:    #0E1C24;
  --navy:       #1B4A6B;
  --accent:     #2F6E58;

  /* 見出し・本文とも Noto Sans JP。ウェイトの差だけで強弱をつける
     読み込みに失敗してもOS標準ゴシックで崩れずに表示される */
  --display: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Meiryo", sans-serif;
  --sans:    "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Meiryo", sans-serif;

  --gut: clamp(20px, 6vw, 80px);
  --maxw: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
  background: var(--bg);
  letter-spacing: .02em;
  font-feature-settings: "palt" 1;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

/* ---------- レイアウト ---------- */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gut); }
.section { padding-block: clamp(72px, 12vw, 140px); }
.section--soft { background: var(--bg-soft); }

/* ---------- ヘッダー ---------- */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease;
}
.header--scrolled { border-bottom-color: var(--line); }
/* 暗いセクションに重なったときに白帯が浮かないよう、やや透過を強める */
@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
  .header { background: rgba(255,255,255,.72); }
}
.header__inner {
  max-width: var(--maxw); margin-inline: auto; padding: 14px var(--gut);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark { width: 40px; height: 40px; border-radius: 50%; }
.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__en {
  font-family: var(--display); font-weight: 700; font-size: 15px; letter-spacing: .16em;
}
.brand__ja { font-size: 10px; letter-spacing: .18em; color: var(--ink-faint); }

.nav { display: flex; align-items: center; gap: clamp(16px, 2.4vw, 34px); }
.nav a {
  font-size: 13px; letter-spacing: .12em; color: var(--ink-soft);
  position: relative; padding-block: 6px; transition: color .25s ease;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 1px;
  background: var(--accent); transform: scaleX(0); transform-origin: right;
  transition: transform .35s cubic-bezier(.22,1,.36,1);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav a[aria-current="page"] { color: var(--ink); }
.nav a[aria-current="page"]::after { transform: scaleX(1); }

/* 言語切り替え */
.nav__lang {
  font-size: 11px !important; letter-spacing: .14em;
  color: var(--ink-faint) !important;
  padding-left: 16px !important; margin-left: 2px;
  border-left: 1px solid var(--line);
}
.nav__lang::after { display: none; }
.nav__lang:hover { color: var(--ink) !important; }

.nav__cta {
  border: 1px solid var(--ink); border-radius: 999px;
  padding: 9px 20px !important; color: var(--ink) !important;
  transition: background .3s ease, color .3s ease;
}
.nav__cta::after { display: none; }
.nav__cta:hover { background: var(--ink); color: #fff !important; }

/* 狭い画面ではヘッダーを2段にし、ナビを下段へ回す */
@media (max-width: 900px) {
  .header__inner {
    flex-direction: column; align-items: stretch; gap: 12px;
    padding-block: 12px 10px;
  }
  .brand { align-self: flex-start; }
  .brand__mark { width: 34px; height: 34px; }
  .brand__en { font-size: 13px; letter-spacing: .18em; }
  .nav {
    justify-content: flex-start; flex-wrap: wrap; gap: 8px 18px;
  }
  .nav a { font-size: 12px; letter-spacing: .08em; }
  .nav__cta { padding: 7px 16px !important; }
  /* 言語切り替えは右端へ。折り返したときに区切り線だけ浮かないよう外す */
  .nav__lang {
    margin-left: auto; padding-left: 0 !important;
    border-left: none;
  }
  .nav__link--shop { display: none; }
}

@media (max-width: 380px) {
  .nav { gap: 8px 13px; }
  .nav a { font-size: 11px; }
}

/* ---------- ヒーロー ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--bg-soft);
  padding-block: clamp(56px, 9vw, 104px) clamp(56px, 9vw, 104px);
}
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%; pointer-events: none;
  filter: blur(60px); opacity: .5;
}
.hero::before {
  width: 46vw; height: 46vw; max-width: 620px; max-height: 620px;
  right: -10vw; top: -14vw;
  background: radial-gradient(circle, #C8E2D5 0%, rgba(200,226,213,0) 70%);
}
.hero::after {
  width: 38vw; height: 38vw; max-width: 480px; max-height: 480px;
  left: -12vw; bottom: -16vw;
  background: radial-gradient(circle, #CBDCE8 0%, rgba(203,220,232,0) 70%);
}
.hero__inner { position: relative; z-index: 1; }
.hero__eyebrow {
  font-family: var(--display); font-weight: 500; font-size: 12px; letter-spacing: .32em;
  color: var(--accent); margin: 0 0 28px;
}
.hero__title {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(28px, 6vw, 64px);
  line-height: 1.5; letter-spacing: .005em; margin: 0;
}
.hero__title .thin { color: var(--ink-soft); }
.hero__lead {
  margin: clamp(28px, 4.5vw, 44px) 0 0; max-width: 32em;
  color: var(--ink-soft); font-size: clamp(14px, 1.6vw, 16px);
}

/* ---------- ページヘッダー（下層） ---------- */
.pagehead {
  background: var(--bg-soft); padding-block: clamp(64px, 11vw, 120px) clamp(48px, 8vw, 84px);
  border-bottom: 1px solid var(--line);
}
.pagehead__en {
  font-family: var(--display); font-weight: 500; font-size: 11px; letter-spacing: .32em;
  color: var(--accent); margin: 0 0 16px;
}
.pagehead__ja {
  font-family: var(--display); font-weight: 700; letter-spacing: .01em;
  font-size: clamp(24px, 4vw, 38px); margin: 0; line-height: 1.45;
}

/* ---------- 見出し ---------- */
.head { margin-bottom: clamp(40px, 6vw, 72px); }
.head__en {
  font-family: var(--display); font-weight: 500; font-size: 11px; letter-spacing: .32em;
  color: var(--accent); margin: 0 0 14px;
}
.head__ja {
  font-family: var(--display); font-weight: 700; letter-spacing: .02em;
  font-size: clamp(21px, 3.2vw, 32px); margin: 0; line-height: 1.55;
}
.head__note { margin: 20px 0 0; color: var(--ink-soft); font-size: 14px; max-width: 40em; }

/* ---------- 事業カード ---------- */
.cards { display: grid; gap: clamp(20px, 3vw, 32px); grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card {
  position: relative; background: var(--bg); border: 1px solid var(--line);
  border-radius: 4px; padding: clamp(30px, 4vw, 48px);
  display: flex; flex-direction: column;
  transition: transform .45s cubic-bezier(.22,1,.36,1), box-shadow .45s ease, border-color .45s ease;
}
.card:hover { transform: translateY(-5px); box-shadow: 0 18px 44px -28px rgba(14,28,36,.38); border-color: #C8DAD0; }
.card__no {
  font-family: var(--display); font-weight: 500; font-size: 12px; letter-spacing: .26em;
  color: var(--ink-faint); display: block; margin-bottom: 20px;
}
.card__title {
  font-family: var(--display); font-weight: 700; font-size: clamp(17px, 2vw, 20px);
  letter-spacing: .02em; margin: 0 0 16px; line-height: 1.6;
}
.card__body { margin: 0; font-size: 14px; color: var(--ink-soft); }
.card__link {
  display: inline-flex; align-items: center; gap: 9px;
  margin-top: auto; padding-top: 24px; align-self: flex-start;
  font-size: 12px; letter-spacing: .12em; color: var(--accent);
}
.card__link::after {
  content: ""; width: 20px; height: 1px; background: currentColor;
  transition: width .3s ease;
}
.card:hover .card__link::after, .card__link:hover::after { width: 32px; }

/* ---------- 写真 ---------- */
.figure { margin: 0; overflow: hidden; border-radius: 4px; background: var(--bg-soft); }
.figure img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform 1.2s cubic-bezier(.22,1,.36,1);
}
.figure--wide { aspect-ratio: 16 / 9; }
/* 本文の流れを邪魔しない大きさに抑える */
@media (max-width: 700px) { .figure--band { aspect-ratio: 3 / 2; } }

/* テキストと写真の2カラム（写真は控えめに） */
.split {
  display: grid; gap: clamp(28px, 5vw, 56px);
  grid-template-columns: 1.25fr 0.75fr; align-items: center;
}
.split .head { margin-bottom: 0; }
.split .figure { aspect-ratio: 4 / 3; max-width: 360px; margin-left: auto; }
/* 事業案内の各セクション用（写真をもう少し大きく） */
.split--wide { grid-template-columns: 1fr 1fr; align-items: center; }
.split--wide .figure { aspect-ratio: 4 / 3; max-width: none; }

@media (max-width: 820px) {
  .split, .split--wide { grid-template-columns: 1fr; }
  .split .figure, .split--wide .figure {
    aspect-ratio: 16 / 9; max-width: 460px; margin-left: 0;
  }
}

/* カード上部のサムネイル（写真つきカードのみ余白を内側に移す） */
.card { overflow: hidden; }
.card--photo { padding: 0; }
.card__figure { aspect-ratio: 16 / 9; margin: 0; overflow: hidden; background: var(--bg-soft); }
.card__figure img { width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform 1.2s cubic-bezier(.22,1,.36,1); }
.card--photo:hover .card__figure img { transform: scale(1.04); }
.card__inner { padding: clamp(26px, 3.4vw, 40px); display: flex; flex-direction: column; flex: 1; }

/* 2カラムブロックの直後に続く要素の間隔 */
.split + .cards,
.split + .dl,
.split + .linklist { margin-top: clamp(40px, 6vw, 72px); }

/* ---------- 定義リスト（会社概要） ---------- */
.dl { border-top: 1px solid var(--line); margin: 0; }
.dl + .linklist { margin-top: clamp(32px, 4vw, 48px); }
.dl__row {
  display: grid; grid-template-columns: 200px 1fr; gap: 0 32px;
  border-bottom: 1px solid var(--line); padding-block: clamp(18px, 2.4vw, 26px);
}
.dl dt {
  font-size: 13px; letter-spacing: .14em; color: var(--ink-soft); margin: 0;
  padding-top: .25em;
}
.dl dd { margin: 0; font-size: 15px; }
.dl dd ul { margin: 0; padding-left: 1.2em; }
.dl dd li { margin-bottom: .3em; }
.dl dd li:last-child { margin-bottom: 0; }
@media (max-width: 700px) {
  .dl__row { grid-template-columns: 1fr; gap: 6px; }
  .dl dt { font-size: 12px; color: var(--ink-faint); }
}

/* ---------- お知らせ ---------- */
.news { border-top: 1px solid var(--line); }
.news__item {
  display: grid; grid-template-columns: 140px 1fr; gap: 0 28px; align-items: baseline;
  border-bottom: 1px solid var(--line); padding-block: 26px;
  transition: background .3s ease, padding-inline .3s ease;
}
a.news__item:hover { background: var(--bg-soft); padding-inline: 16px; }
.news__date { font-family: var(--display); font-weight: 500; font-size: 13px; letter-spacing: .06em; color: var(--ink-faint); }
.news__title { font-size: 15px; letter-spacing: .06em; }
@media (max-width: 640px) {
  .news__item { grid-template-columns: 1fr; gap: 6px; }
}

/* ---------- 記事本文 ---------- */
.prose { max-width: 40em; }
.prose p { margin: 0 0 1.9em; }
.prose h2 {
  font-family: var(--display); font-weight: 700; letter-spacing: .02em;
  font-size: clamp(18px, 2.2vw, 22px); margin: 2.6em 0 1em;
}
.prose a { color: var(--accent); border-bottom: 1px solid currentColor; }

/* ---------- 外部リンク ---------- */
/* 外部リンク一覧。定義リストと同じ罫線の引き方に揃える */
.linklist { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.linklist li { border-bottom: 1px solid var(--line); }
.linklist a {
  display: flex; align-items: center; gap: 12px;
  padding-block: clamp(16px, 2vw, 22px);
  font-size: 15px; letter-spacing: .04em; color: var(--ink);
  transition: color .25s ease;
}
.linklist a::after {
  content: "↗"; margin-left: auto; font-size: 12px; color: var(--ink-faint);
  transition: color .25s ease;
}
.linklist a:hover { color: var(--navy); }
.linklist a:hover::after { color: var(--navy); }

/* ---------- CTA ---------- */
.cta {
  background: var(--bg-deep); color: #fff;
  padding-block: clamp(64px, 11vw, 120px); text-align: center;
}
.cta__en { font-family: var(--display); font-weight: 500; font-size: 11px; letter-spacing: .32em; color: #7FB79E; margin: 0 0 18px; }
.cta__title {
  font-family: var(--display); font-weight: 700; letter-spacing: .02em;
  font-size: clamp(21px, 3.2vw, 32px); margin: 0 0 20px; line-height: 1.55;
}
.cta__lead { margin: 0 auto 40px; max-width: 32em; font-size: 14px; color: rgba(255,255,255,.62); }

.btn {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 17px 44px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.45); color: #fff;
  font-size: 13px; letter-spacing: .16em;
  transition: background .35s ease, color .35s ease, border-color .35s ease;
}
.btn::after { content: "→"; transition: transform .35s ease; }
.btn:hover { background: #fff; color: var(--ink); border-color: #fff; }
.btn:hover::after { transform: translateX(5px); }

.btn--ink { border-color: var(--ink); color: var(--ink); }
.btn--ink:hover { background: var(--ink); color: #fff; }

/* ---------- フッター ---------- */
.footer { background: var(--bg-deep); color: rgba(255,255,255,.62); padding-block: clamp(56px, 8vw, 88px) 32px; }
.footer__top {
  display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between;
  padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.12);
}
.footer__brand-en { font-family: var(--display); font-weight: 700; font-size: 17px; letter-spacing: .14em; color: #fff; margin: 0 0 12px; }
.footer__addr { margin: 0; font-size: 13px; font-style: normal; line-height: 2.1; }
.footer__nav { display: grid; gap: 12px; }
.footer__nav a { font-size: 13px; letter-spacing: .1em; transition: color .25s ease; }
.footer__nav a:hover { color: #fff; }
.footer__bottom { padding-top: 28px; font-size: 11px; letter-spacing: .1em; color: rgba(255,255,255,.4); }

/* ---------- お問い合わせ（Googleフォーム） ---------- */
.formbox { border: 1px solid var(--line); border-radius: 4px; overflow: hidden; background: var(--bg-soft); }
.formbox iframe { width: 100%; min-height: 1100px; border: 0; display: block; background: #fff; }
.formbox__fallback { padding: clamp(32px, 5vw, 56px); text-align: center; }
.formbox__fallback p { margin: 0 0 28px; color: var(--ink-soft); font-size: 14px; }

/* ---------- スクロール演出（JSなし・段階的強化） ---------- */
/* JSが有効なときだけ隠す。JSが動かない環境では最初から表示される */
.js .reveal { opacity: 0; transform: translateY(22px); }
.js .reveal.is-in { opacity: 1; transform: none; transition: opacity .9s ease, transform .9s cubic-bezier(.22,1,.36,1); }
.js .reveal.is-static { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal, .js .reveal.is-in { opacity: 1; transform: none; transition: none; }
}