/* ========== Base ========== */
:root{
  --bg:#ffffff;
  --fg:#111;
  --muted:#666;
  --line:#e8e8e8;
  --card:#fafafa;
  --max:1100px;
  --radius:14px;
  --shadow: 0 10px 30px rgba(0,0,0,.06);
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
body{
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
  color:var(--fg);
  background:var(--bg);
  line-height:1.7;
}

img{ max-width:100%; height:auto; display:block; }
a{ color:inherit; text-decoration:none; }
p{ margin:0 0 1em; color:var(--muted); }

.container{
  width:min(100%, calc(var(--max) + 40px));
  margin:0 auto;
  padding:0 20px;
}

.section{
  padding:64px 0;
  border-top:1px solid var(--line);
}

.h1{
  font-size:clamp(28px, 4vw, 44px);
  letter-spacing:-0.02em;
  line-height:1.2;
  margin:0 0 12px;
}
.h2{
  font-size:clamp(20px, 2.6vw, 28px);
  margin:0 0 14px;
}
.small{ font-size:14px; color:var(--muted); }
.badge{
  display:inline-block;
  font-size:12px;
  padding:6px 10px;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--muted);
  background:#fff;
  margin-bottom: 10px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:12px 16px;
  border-radius:999px;
  border:1px solid var(--fg);
  background:var(--fg);
  color:#fff;
  font-weight:600;
  gap:10px;
}
.btn.ghost{
  background:transparent;
  color:var(--fg);
}

.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  overflow:hidden;
}
@media (max-width: 980px){
  .section{
    padding:32px 0;
  }
}
/* ========== Header / Nav ========== */
.header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.9);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
}
.navbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 0;
  gap:16px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size: 13px;
  letter-spacing:0.02em;
}
.brand img{ width:150px; height:auto; }
@media (max-width: 980px){
	.brand img{ width:120px; height:auto; }
	.navbar{padding:10px 0;	}
}
.navlinks{
  display:flex;
  align-items:center;
  gap:18px;
  font-weight:600;
}
.navlinks a{
  padding:8px 10px;
  border-radius:10px;
}
.navlinks a:hover{
  background:#f2f2f2;
}

/* Mobile menu */
#nav-toggle{ display:none; }
.burger{
  display:none;
  width:42px; height:42px;
  border:1px solid var(--line);
  border-radius:12px;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  background:#fff;
}
.burger span{
  width:18px;
  height:2px;
  background:var(--fg);
  position:relative;
  display:block;
}
.burger span::before,
.burger span::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:var(--fg);
}
.burger span::before{ top:-6px; }
.burger span::after{ top:6px; }

@media (max-width: 820px){
  .burger{ display:flex; }
  .navlinks{
    position:fixed;
    inset:72px 16px auto 16px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:8px;
    padding:14px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:16px;
    box-shadow:var(--shadow);
  }
  .navlinks a{ background:#fafafa; border:1px solid var(--line); }
  #nav-toggle:checked ~ .navlinks{ display:flex; }
}

/* ========== Hero ========== */
.hero{
  padding:70px 0 40px;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap:22px;
  align-items:stretch;
}
.hero-kv{
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  background:#f6f6f6;
  box-shadow:var(--shadow);
  min-height:520px;
}
.hero-kv img{
  width:100%;
  height:100%;
  object-fit:cover;
  min-height:320px;
}
.hero-box{
  padding:22px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:#fff;
  box-shadow:var(--shadow);
}
.hero-cta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:14px;
}

@media (max-width: 980px){
  .hero-grid{ grid-template-columns:1fr; }
  .hero {
      padding: 20px 0 20px;
  }
}

/* ========== Grid / Product list ========== */
.grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:16px;
}
@media (max-width: 980px){
  .grid{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px){
  .grid{ grid-template-columns: repeat(2, 1fr); }
}


.product-card .thumb{
  background:#efefef;
}
.product-card .thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.product-card .body{
  padding:14px;
}
.price{
  font-weight:800;
  color:var(--fg);
}
.muted{ color:var(--muted); }
.product-title {
display:flex;
justify-content:space-between;
gap:10px;
align-items:baseline;
}
@media (max-width: 560px){
 .product-title {
display:block;
 }
}

/* ========== Product detail ========== */
.product-detail{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:22px;
  align-items:start;
}
@media (max-width: 980px){
  .product-detail{ grid-template-columns:1fr; }
}
.product-image{
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  background:#f2f2f2;
  box-shadow:var(--shadow);
}
.product-info{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:#fff;
  box-shadow:var(--shadow);
  padding:30px;
}
.product-info h1{
  font-size:clamp(22px, 3vw, 30px);
  margin:0 0 8px;
}
.kvline{
  height:1px;
  background:var(--line);
  margin:14px 0;
}
.price {
  font-size:24px;
}
.back-link {
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-top:24px;
}
@media (max-width: 980px){
.price {
    font-size: 20px;
}
}

/* ========== Footer ========== */
.footer{
  padding:26px 0;
  border-top:1px solid var(--line);
  color:var(--muted);
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
}

/* ========== Footer Social ========== */
.footer-social{
  display:flex;
  align-items:center;
}

.footer-social a{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
  border-radius:999px;
  transition: background .2s ease;
}

.footer-social a:hover{
  background:#f2f2f2;
}

.ig-icon{
  width:18px;
  height:18px;
  fill:none;
  stroke: var(--muted);
  stroke-width:1.6;
  transition: stroke .2s ease;
}

.footer-social a:hover .ig-icon{
  stroke: var(--fg);
}