/* seafect.com 静的版 — 自前の CSS（テーマ由来のものは含まない）
   書体は OS のもの。見出しの英字（BUY / MESSAGE 等）だけ明朝系。 */

:root {
  --accent: #2dccd3;
  --accent-text: #0a7c82; /* 文字に使う水色（白〜#f2f2f2 の地で 4.5:1 以上）。--accent は飾り用に残す */
  --ink: #0e101c;
  --text: #111;
  --muted: #555;
  --line: #ddd;
  --paper: #f5f5f5;
  --paper-2: #f2f2f2;
  --header-h: 100px;
  --font-sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic Medium", "Yu Gothic", YuGothic, Meiryo, system-ui, sans-serif;
  --font-serif: "Times New Roman", Georgia, "Hiragino Mincho ProN", "Yu Mincho", YuMincho, serif;
}

*, *::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(--font-sans);
  font-size: 14px;
  line-height: 2;
  letter-spacing: 0.08em;
  color: var(--text);
  background: #fff;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { opacity: 0.8; }
h1, h2, h3, h4, h5 { margin: 0; font-weight: 700; line-height: 1.5; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ── ヘッダー ────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--header-h);
  background: #fff;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px;
}
.site-header__brand { display: flex; align-items: center; gap: 70px; }
.site-header__logo { display: block; width: 310px; }
.site-header__logo img { width: 100%; height: auto; }
.site-header__tagline { font-size: 13px; letter-spacing: 0.15em; color: #222; margin: 0; }
.site-nav ul { display: flex; gap: 38px; }
.site-nav a { font-size: 14px; letter-spacing: 0.1em; color: #222; }
.menu-button {
  display: none; width: 44px; height: 44px; border: 0; background: none; cursor: pointer; padding: 0;
  position: relative;
}
.menu-button span { position: absolute; left: 10px; right: 10px; height: 3px; background: #000; border-radius: 1px; transition: transform .2s, opacity .2s; }
.menu-button span:nth-child(1) { top: 13px; }
.menu-button span:nth-child(2) { top: 21px; }
.menu-button span:nth-child(3) { top: 29px; }
.menu-open .menu-button span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.menu-open .menu-button span:nth-child(2) { opacity: 0; }
.menu-open .menu-button span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.drawer {
  position: fixed; top: var(--header-h); right: 0; bottom: 0; width: min(80vw, 320px); z-index: 49;
  background: #fff; border-left: 1px solid var(--line);
  transform: translateX(100%); visibility: hidden; transition: transform .25s, visibility 0s .25s; overflow-y: auto;
}
.menu-open .drawer { transform: none; visibility: visible; transition: transform .25s; }
.drawer a { display: block; padding: 18px 24px; border-bottom: 1px solid #eee; font-size: 15px; }
.drawer-backdrop { position: fixed; inset: var(--header-h) 0 0; background: rgba(0,0,0,.3); z-index: 48; display: none; }
.menu-open .drawer-backdrop { display: block; }

/* ── 共通の部品 ──────────────────────────── */
.container { max-width: 1320px; margin: 0 auto; padding: 0 16px; }
.container--m { max-width: 1056px; }
.container--s { max-width: 992px; }
.container--xs { max-width: 832px; }
.section-title-en {
  font-family: var(--font-serif); font-weight: 400; font-size: 40px; line-height: 1.2;
  color: var(--accent-text); text-align: center; letter-spacing: 0.05em; margin: 20px 0 4px;
}
.section-title-jp { text-align: center; font-size: 14px; margin: 0 0 40px; }
.btn {
  display: inline-block; min-width: 200px; padding: 0 24px; height: 50px; line-height: 50px;
  background: #555; color: #fff; text-align: center; font-size: 14px;
}
.btn--outline {
  display: block; width: 260px; height: 60px; line-height: 58px; margin: 0 auto;
  border: 1px solid #212121; background: transparent; color: var(--accent-text); text-align: center; font-size: 14px;
  transition: transform .3s;
}
.btn--outline:hover { transform: translateY(-5px); }
.spacer { height: 60px; }

/* ── トップ：ヒーロー（2枚を CSS だけで切り替え） ── */
.hero { position: relative; height: 100vh; min-height: 560px; max-height: 1000px; overflow: hidden; background: #333; }
.hero__slide { position: absolute; inset: 0; }
.hero__slide img { width: 100%; height: 100%; object-fit: cover; }
.hero__slide::after { content: ""; position: absolute; inset: 0; background: rgba(0,0,0,.3); }
.hero__caption {
  margin: 0;
  position: absolute; inset: 0; z-index: 2; display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 34px; font-weight: 400; letter-spacing: 0.1em; text-align: center; padding: 0 24px;
  text-shadow: 0 1px 8px rgba(0,0,0,.25);
}
.hero__slide--2 { opacity: 0; animation: hero-fade 14s infinite; }
@keyframes hero-fade {
  0%, 42% { opacity: 0; }
  50%, 92% { opacity: 1; }
  100% { opacity: 0; }
}
@media (prefers-reduced-motion: reduce) { .hero__slide--2 { animation: none; } }

/* ── トップ：導入（写真6枚＋文） ── */
.intro { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; padding: 90px 8px 60px; max-width: 1320px; margin: 0 auto; }
.intro h2 { font-size: 18px; margin-bottom: 18px; }
.intro p { line-height: 2.85; }

/* ── 商品 4 列 ── */
.products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 50px; max-width: 1320px; margin: 0 auto; padding: 0 8px; }
.products--flush { gap: 0; padding: 0; }
.product { text-align: center; }
.product img { width: 100%; }
.product h3 { font-size: 18px; margin: 50px 0 10px; }
.product__price { margin-bottom: 12px; }

/* ── トップ：MESSAGE ── */
.message { position: relative; display: grid; grid-template-columns: 1fr 1.35fr; align-items: center; max-width: 1320px; margin: 0 auto; }
.message::before { content: ""; position: absolute; left: 384px; right: 0; top: 0; bottom: 0; background: var(--paper); }
.message__text { position: relative; z-index: 1; padding: 100px 32px 100px 32px; }
.message__text .section-title-en { text-align: left; margin: 0; font-size: 36px; }
.message__text h2 { font-size: 40px; font-weight: 400; line-height: 1.4; margin-bottom: 60px; letter-spacing: 0.06em; }
.message__text p { font-size: 14px; line-height: 1.75; margin: 0; }
.message__image { position: relative; z-index: 1; padding: 120px 48px 60px 32px; }
.message__image img { width: 100%; }

/* ── トップ：横長写真 ── */
.band { height: 460px; overflow: hidden; }
.band img { width: 100%; height: 100%; object-fit: cover; object-position: center 60%; }

/* ── トップ：LINE UP 画像リンク ── */
.lineup-link { display: block; max-width: 800px; margin: 0 auto; }
.lineup-link img { width: 100%; }

/* ── FAQ（トップ・FAQ ページ共通） ── */
.faq-section { background: #f8f8f8; padding: 70px 0 120px; }
.faq-list { max-width: 1024px; margin: 0 auto; padding: 0 16px; }
.faq-item { background: #fff; border: 1px solid #eee; padding: 32px 30px; margin-bottom: 10px; }
.faq-item h2, .faq-item h3 { font-size: 18px; margin-bottom: 6px; letter-spacing: 0.05em; }
.faq-item p { margin: 0; line-height: 1.7; }
.faq-page .faq-list { max-width: 992px; }
.faq-page .faq-item { margin-bottom: 20px; }
.faq-page .faq-item p { line-height: 2.1; }

/* ── お問い合わせ（2色） ── */
.contact { display: grid; grid-template-columns: 1fr 1fr; }
.contact__cell { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 270px; padding: 20px; color: #fff; background: #333; }
.contact__cell:nth-child(2) { background: #212121; }
.contact__cell p { font-size: 18px; margin: 0 0 10px; }
.contact__btn { display: block; width: 240px; height: 90px; line-height: 88px; border: 1px solid #fff; text-align: center; font-size: 18px; }
.contact__qr { display: inline-block; vertical-align: top; width: 180px; height: 180px; background: #fff; padding: 10px; box-sizing: border-box; }
.contact__qr img { display: block; width: 100%; height: 100%; }

/* ── フッター ── */
.site-footer__brand { background: var(--paper-2); text-align: center; padding: 100px 16px; }
.site-footer__logo { display: inline-block; width: 310px; }
.site-footer__brand p { margin: 40px 0 0; font-size: 16px; letter-spacing: 0.15em; }
.site-footer__menu { padding: 36px 16px 10px; }
.site-footer__menu ul { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 40px; }
.site-footer__menu a { font-size: 14px; }
.site-footer__copy { text-align: center; font-size: 12px; padding: 20px 16px 40px; margin: 0; letter-spacing: 0.1em; }
.totop {
  position: fixed; right: 0; bottom: 60px; z-index: 40; width: 60px; height: 60px; background: #000; color: #fff;
  display: flex; align-items: center; justify-content: center;
}
.totop::before { content: ""; width: 10px; height: 10px; border-top: 1px solid #fff; border-left: 1px solid #fff; transform: translateY(3px) rotate(45deg); }

/* ── 下層：ページの頭（写真＋見出し＋タブ） ── */
.page-header { position: relative; height: 550px; overflow: hidden; display: flex; align-items: center; justify-content: center; }
.page-header img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.page-header::after { content: ""; position: absolute; inset: 0; background: rgba(255,255,255,.4); }
.page-header--dark::after { background: rgba(0,0,0,.15); }
.page-header--plain::after { background: rgba(255,255,255,.25); }
.page-header h1 { position: relative; z-index: 1; font-size: 40px; font-weight: 400; letter-spacing: 0.1em; color: var(--ink); text-align: center; padding: 0 16px; }
.page-header--dark h1 { color: #fff; }
.page-header__sub { position: relative; z-index: 1; margin: 6px 0 0; font-size: 14px; }
.page-header__center { position: relative; z-index: 1; text-align: center; }
.page-tabs { position: absolute; left: 50%; bottom: 0; transform: translateX(-50%); z-index: 2; display: flex; width: 800px; max-width: 100%; }
.page-tabs a { flex: 1; height: 60px; line-height: 60px; text-align: center; font-size: 14px; color: #000; background: rgba(255,255,255,.7); }
.page-tabs a:hover { color: #fff; background: #333; opacity: 1; }
.page-tabs a.is-active { color: #fff; background: #000; }
.page-tabs--2 { width: 400px; }

/* ── 下層：本文の基本 ── */
.article { max-width: 832px; margin: 0 auto; padding: 100px 16px 120px; }
.article h2 { font-size: 22px; margin: 40px 0 14px; }
.article p { line-height: 2.1; margin: 0 0 8px; }
.article a { text-decoration: underline; text-underline-offset: 2px; overflow-wrap: anywhere; }
.lead { text-align: center; padding: 70px 16px 40px; }
.lead h2 { font-size: 24px; font-weight: 400; letter-spacing: 0.1em; margin-bottom: 36px; }
.lead p { max-width: 800px; margin: 0 auto; line-height: 1.75; text-align: left; }

/* ── 製品ページ ── */
.product-section { max-width: 1056px; margin: 0 auto; padding: 60px 16px 40px; }
.product-section h2 { font-size: 44px; letter-spacing: 0.06em; margin: 40px 0 40px; }
.point-label { font-family: var(--font-sans); font-weight: 300; font-size: 28px; color: var(--accent-text); letter-spacing: 0.1em; margin: 40px 0 30px; }
.product-section h3 { font-size: 24px; letter-spacing: 0.05em; padding-bottom: 20px; margin-bottom: 40px; position: relative; }
.product-section h3::after { content: ""; position: absolute; left: 0; bottom: 0; width: 80px; border-bottom: 1px solid #000; }
.product-section h4 { font-size: 18px; margin: 0 0 14px; line-height: 1.6; }
.product-section p { line-height: 2.85; margin: 0 0 1.4em; }
.cols { display: grid; grid-template-columns: 1fr 450px; gap: 50px; align-items: start; }
.cols--img-left { grid-template-columns: 490px 1fr; }
.cols img { width: 100%; }
.usage { border: 1px solid var(--line); padding: 30px 30px 20px; margin: 40px 0 50px; }
.usage__label { padding-left: 46px; }
.usage__body { border-left: 1px solid #eee; margin-left: 30px; padding-left: 20px; }
.usage__list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 40px; max-width: 760px; }
.usage__list li { position: relative; padding-left: 16px; font-size: 13px; line-height: 3; }
.usage__list li::before { content: "◦"; position: absolute; left: 0; }
.usage__note { font-size: 14px; }
.voices { border: 1px solid var(--line); background: #fafafa; padding: 22px 30px; margin-bottom: 30px; }
.voices p { margin: 0; }
.scenes-label { border: 1px solid var(--line); background: #fafafa; padding: 22px 30px; margin: 10px 0 30px; }
.scenes { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; margin-bottom: 20px; }
.scene { text-align: center; }
.scene img { width: 150px; height: 150px; margin: 0 auto 16px; object-fit: cover; }
.scene p { line-height: 1.6; margin: 0; }
.highlight { border: 1px solid var(--line); background: #fafafa; padding: 22px 30px; margin: 40px 0 30px; }
.highlight p { margin: 0; }
.ingredients { max-width: 800px; margin: 30px auto 80px; }
.ingredients caption { font-weight: 700; font-size: 18px; padding-bottom: 14px; }
.ingredients table { width: 100%; border-collapse: collapse; }
.ingredients td { border: 1px solid #ccc; padding: 14px 16px; font-size: 16px; }
.ingredients td:first-child { width: 34%; background: var(--paper); }
.dev-story { background: var(--paper); max-width: 1024px; margin: 0 auto; padding: 100px 110px 80px; }
.dev-story .cols { gap: 10px; align-items: center; }
.dev-story h2 { font-size: 24px; margin: 0 0 16px; }
.dev-story p { line-height: 2.85; margin: 0 0 20px; }
.dev-story .btn--outline { margin: 0 0 0 auto; }
.lineup { padding: 100px 0 100px; }
.lineup .products { max-width: 1024px; }
.lineup .product h3 { margin-top: 70px; }

/* ── 開発ストーリー ── */
.story { max-width: 1248px; margin: 0 auto; padding: 0 16px 80px; }
.story__block { margin: 60px 0; }
.story__head { display: flex; align-items: center; gap: 20px; border: 1px solid #000; padding: 22px 30px; margin-bottom: 50px; }
.story__num { flex: none; width: 160px; height: 44px; line-height: 44px; background: #000; color: #fff; font-size: 18px; text-align: center; }
.story__head h2 { font-size: 24px; letter-spacing: 0.05em; }
.story__body h3 { font-size: 18px; margin: 0 0 14px; }
.story__body p { line-height: 2.85; margin: 0 0 20px; }
.story__cols { display: grid; grid-template-columns: 1fr 450px; gap: 40px; align-items: start; }
.story__cols img { width: 100%; }
.points { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px; }
.point { background: var(--paper); padding: 40px; font-size: 12px; }
.point__num { display: block; color: var(--accent-text); font-size: 12px; margin-bottom: 28px; }
.point h4 { font-size: 18px; padding-bottom: 20px; margin-bottom: 40px; position: relative; }
.point h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 80px; border-bottom: 1px solid #000; }
.point p { font-size: 12px; line-height: 2.4; margin: 0; }

/* ── 会社概要 ── */
.company-section { max-width: 832px; margin: 0 auto; padding: 60px 16px 40px; }
.company-section h2 { font-size: 24px; font-weight: 400; text-align: center; letter-spacing: 0.1em; margin-bottom: 40px; }
.company-table { display: grid; grid-template-columns: 160px 1fr; border: 1px solid var(--line); border-bottom: 0; margin: 0; }
.company-table dt, .company-table dd { margin: 0; padding: 14px 24px; border-bottom: 1px solid var(--line); font-size: 14px; line-height: 1.8; }
.company-table dt { background: #fafafa; text-align: center; display: flex; align-items: center; justify-content: center; }
.access { text-align: center; }
.access p { margin: 0 0 10px; }
.access__map { display: inline-block; margin: 10px 0 40px; border: 1px solid #212121; padding: 0 30px; height: 50px; line-height: 48px; font-size: 14px; }
.company-links { border-top: 1px solid #eee; border-bottom: 1px solid #eee; padding: 30px 0; margin-top: 70px; }
.company-links h2 { text-align: left; font-size: 18px; font-weight: 700; margin: 0 0 30px; }
.company-links li { position: relative; padding-left: 16px; }
.company-links li::before { content: "◦"; position: absolute; left: 0; }
.company-links a { color: var(--accent-text); }

/* ── 404 ── */
.notfound { text-align: center; padding: 120px 16px 160px; }
.notfound h1 { font-size: 28px; font-weight: 400; margin-bottom: 30px; }
.notfound p { margin-bottom: 40px; }

/* ── スマホ ──────────────────────────────── */
@media (max-width: 1023px) {
  .site-header { padding: 0 24px; }
  .site-header__brand { gap: 30px; }
  .site-header__tagline { display: none; }
  .site-nav { display: none; }
  .menu-button { display: block; }
  .page-tabs { width: 100%; }
  .page-tabs a { font-size: 13px; }
  .intro { grid-template-columns: 1fr; gap: 40px; padding: 60px 16px 40px; }
  .products { grid-template-columns: 1fr 1fr; gap: 40px 24px; }
  .message { grid-template-columns: 1fr; }
  .message::before { left: 0; }
  .message__text { padding: 60px 24px 30px; }
  .message__image { padding: 0 24px 60px; }
  .cols, .cols--img-left, .story__cols { grid-template-columns: 1fr; gap: 30px; }
  .cols img, .story__cols img { max-width: 450px; margin: 0 auto; }
  .usage__list { grid-template-columns: 1fr; }
  .scenes { grid-template-columns: repeat(3, 1fr); }
  .dev-story { padding: 60px 24px; }
  .points { grid-template-columns: 1fr 1fr; }
  .contact { grid-template-columns: 1fr; }
}
@media (max-width: 639px) {
  body { font-size: 16px; }
  .site-header { padding: 0 16px; }
  .site-header__logo { width: 250px; }
  .hero { height: min(calc(100vh - var(--header-h)), 640px); min-height: 420px; }
  .hero__caption { font-size: 26px; }
  .section-title-en { font-size: 36px; }
  .products { grid-template-columns: 1fr; gap: 50px; }
  .products .product img { max-width: 320px; margin: 0 auto; }
  .lineup .products { padding: 0 16px; }
  .message__text h2 { font-size: 32px; margin-bottom: 30px; }
  .band { height: 300px; }
  .faq-item { padding: 24px 20px; }
  .faq-item h2, .faq-item h3 { font-size: 17px; }
  .page-header { height: 440px; }
  .page-header h1 { font-size: 32px; }
  .page-tabs a { height: 70px; line-height: 70px; }
  .lead h2 { font-size: 22px; }
  .product-section h2 { font-size: 40px; }
  .product-section h3 { font-size: 22px; }
  .scenes { grid-template-columns: 1fr 1fr; }
  .scene img { width: 100%; height: auto; }
  .story__head { flex-direction: column; align-items: flex-start; padding: 24px; }
  .story__head h2 { font-size: 22px; }
  .points { grid-template-columns: 1fr; }
  .company-table { grid-template-columns: 110px 1fr; }
  .company-table dt, .company-table dd { padding: 14px 12px; font-size: 15px; }
  .site-footer__logo { width: 250px; }
  .site-footer__brand { padding: 70px 16px; }
  .site-footer__menu ul { flex-direction: column; align-items: center; gap: 10px; }
  .article { padding: 60px 16px 80px; }
  .intro p, .product-section p, .story__body p, .dev-story p, .message__text p { line-height: 2; }
  .point p { font-size: 14px; }
  .contact__cell { min-height: 220px; }
  .contact__btn { width: 220px; height: 70px; line-height: 68px; }
}