/* 佐久間商店 Webサイト（最終版） */
:root{
  --bg:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --card:#ffffff;
  --line:#e5e7eb;
  --brand:#0f6b6b;
  --brand2:#0b4f4f;
  --shadow: 0 10px 30px rgba(0,0,0,.08);
  --radius: 16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", "Meiryo", sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.7;
}
a{color:inherit}
.container{
  width:min(1120px, calc(100% - 40px));
  margin-inline:auto;
}

/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.9);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 0;
  gap:14px;
}
.brand{display:flex; align-items:center; text-decoration:none}
.logo{height:44px; width:auto; display:block}
.nav{
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
}
.nav a{
  text-decoration:none;
  color:var(--text);
  font-size:14px;
  padding:8px 10px;
  border-radius:999px;
}
.nav a:hover{background:#f3f4f6}
.nav .nav-cta{
  background:var(--brand);
  color:#fff;
}
.nav .nav-cta:hover{background:var(--brand2)}
.nav .nav-ig{
  border:1px solid var(--line);
}
.menu-btn{
  display:none;
  border:1px solid var(--line);
  background:#fff;
  padding:10px 12px;
  border-radius:12px;
  font-size:18px;
}
.mobile-nav{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
}
.mobile-nav a{
  display:block;
  padding:14px 20px;
  text-decoration:none;
  border-bottom:1px solid #f3f4f6;
}
.mobile-nav.open{display:block}

/* Hero */
.hero{
  position:relative;
  min-height:72vh;
  display:flex;
  align-items:center;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(180deg, rgba(0,0,0,.35), rgba(0,0,0,.35)),
    url('assets/iwataya.jpg');
  background-size:cover;
  background-position:center;
}
.hero-inner{position:relative; padding:48px 0}
.hero-card{
  background:rgba(255,255,255,.94);
  border:1px solid rgba(255,255,255,.55);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  padding:28px;
  width:min(680px, 100%);
}
.hero h1{
  margin:0 0 12px;
  font-size:clamp(24px, 3.2vw, 40px);
  line-height:1.25;
  letter-spacing:.02em;
}
.hero .sub{
  display:block;
  margin-top:8px;
  font-weight:600;
  color:var(--brand2);
  font-size:clamp(14px, 1.6vw, 18px);
}
.lead{margin:0 0 18px; color:#111827}
.hero-actions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin:16px 0 12px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 16px;
  border-radius:999px;
  border:1px solid var(--line);
  text-decoration:none;
  background:#fff;
  font-weight:600;
}
.btn.primary{
  background:var(--brand);
  color:#fff;
  border-color:transparent;
}
.btn.primary:hover{background:var(--brand2)}
.btn:hover{background:#f9fafb}
.order-note{
  margin-top:10px;
  padding:12px 14px;
  border-radius:14px;
  background:#f9fafb;
  border:1px solid var(--line);
}
.order-row{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  font-size:15px;
}
.small{font-size:12.5px; color:var(--muted)}

/* Sections */
.section{padding:64px 0}
.section.alt{background:#fafafa; border-top:1px solid #f3f4f6; border-bottom:1px solid #f3f4f6}
.section h2{margin:0 0 10px; font-size:26px; letter-spacing:.02em}
.kicker{color:var(--brand2); font-weight:700; margin:0 0 20px}
.muted{color:var(--muted)}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
}
.grid.two{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap:22px;
  align-items:start;
}
.pillars{display:grid; gap:12px}
.pillar{
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  padding:14px;
  box-shadow: 0 6px 16px rgba(0,0,0,.04);
}
.pillar h3{margin:0 0 6px; font-size:16px}
.pillar p{margin:0; color:var(--muted); font-size:14px}

/* Product cards */
.cards{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap:14px;
  margin-top:18px;
}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
  box-shadow: 0 8px 18px rgba(0,0,0,.04);
}
.card img{
  width:100%;
  aspect-ratio: 4/3;
  object-fit:cover;
  display:block;
}
.card h3{margin:12px 12px 6px; font-size:16px}
.card p{margin:0 12px 14px; color:var(--muted); font-size:14px}

/* Stores */
.store-grid{display:grid; grid-template-columns: 1fr; gap:16px; margin-top:16px}
.store{
  display:grid;
  grid-template-columns: 1fr 1.2fr;
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
  box-shadow: 0 10px 22px rgba(0,0,0,.04);
}
.store-media img{width:100%; height:100%; object-fit:cover; display:block; min-height:260px}
.store-body{padding:18px}
.store-body h3{margin:0 0 10px; font-size:18px}
.dl{margin:0; display:grid; gap:8px}
.dl div{display:grid; grid-template-columns: 72px 1fr; gap:10px}
dt{color:var(--muted); font-weight:700}
dd{margin:0}
.map-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  text-decoration:none;
  background:#fff;
  font-weight:800;
}
.map-btn:hover{background:#f9fafb}
.map-note{margin-top:10px}

.list{margin:12px 0 0; padding-left:18px}

/* CTA */
.cta-box{
  margin-top:18px;
  padding:16px;
  border-radius:16px;
  border:1px solid var(--line);
  background:#fff;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
}
.cta-actions{display:flex; gap:10px; flex-wrap:wrap}

/* FAQ */
.faq{
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px 14px;
  background:#fff;
  margin-top:10px;
}
.faq summary{cursor:pointer; font-weight:800}
.faq p{margin:10px 0 0; color:var(--muted)}

/* Contact */
.contact-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:14px;
  margin-top:16px;
}
.contact-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  padding:16px;
  box-shadow: 0 8px 18px rgba(0,0,0,.04);
}
.contact-card h3{margin:0 0 6px}
.big{font-size:20px; font-weight:900; margin:0}

/* Footer */
.site-footer{
  background:#0b1220;
  color:#e5e7eb;
  padding:28px 0;
}
.footer-inner{display:grid; gap:16px}
.footer-brand{display:flex; align-items:center; gap:12px}
.footer-logo{height:44px; width:auto; background:#fff; border-radius:10px; padding:4px}
.footer-title{font-weight:900; letter-spacing:.04em}
.footer-cols{
  display:grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap:14px;
}
.footer-head{font-weight:900; margin-bottom:6px}
.site-footer a{color:#e5e7eb}
.footer-bottom{
  border-top:1px solid rgba(229,231,235,.2);
  padding-top:12px;
  font-size:12px;
  color:#cbd5e1;
}

/* Responsive */
@media (max-width: 980px){
  .nav{display:none}
  .menu-btn{display:inline-flex}
  .grid.two{grid-template-columns: 1fr}
  .cards{grid-template-columns: repeat(2, 1fr)}
  .store{grid-template-columns: 1fr}
  .contact-grid{grid-template-columns: 1fr}
}