/* ============================================
   SWINGCORE JAPAN — MVP Stylesheet
   海外ブランド風 / レスポンシブ対応
   ============================================ */
:root {
  --ink: #101511;
  --ink-soft: #3d453f;
  --paper: #f7f5f0;
  --white: #ffffff;
  --green: #0e3b2e;
  --green-deep: #092820;
  --lime: #b4f04c;
  --copper: #c8a24a;
  --line: #e3e0d8;
  --radius: 14px;
  --maxw: 1160px;
  --font-display: "Oswald", "Noto Sans JP", sans-serif;
  --font-body: "Noto Sans JP", "Inter", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img, svg, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(9, 40, 32, .92);
  backdrop-filter: blur(10px);
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.header-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.logo {
  font-family: var(--font-display);
  font-size: 1.35rem; font-weight: 700; letter-spacing: .16em;
}
.logo span { color: var(--lime); }
.logo small {
  display: block; font-family: var(--font-body);
  font-size: .58rem; font-weight: 500; letter-spacing: .32em;
  color: rgba(255,255,255,.65); margin-top: -4px;
}
.gnav ul { display: flex; gap: 30px; align-items: center; }
.gnav a {
  font-size: .85rem; font-weight: 500; letter-spacing: .08em;
  padding: 6px 0; position: relative; transition: color .2s;
}
.gnav a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; background: var(--lime); transition: width .25s;
}
.gnav a:hover::after, .gnav a.current::after { width: 100%; }
.gnav .nav-cta a {
  background: var(--lime); color: var(--green-deep);
  padding: 10px 22px; border-radius: 999px; font-weight: 700;
}
.gnav .nav-cta a::after { display: none; }
.gnav .nav-cta a:hover { opacity: .85; }

.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer;
  width: 44px; height: 44px; position: relative; z-index: 110;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px; background: #fff;
  margin: 5px auto; transition: transform .25s, opacity .25s;
}
body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative; color: var(--white);
  background:
    radial-gradient(1000px 500px at 85% 15%, rgba(180,240,76,.16), transparent 60%),
    linear-gradient(160deg, #0b2f25 0%, #092820 45%, #051a14 100%);
  padding: 180px 0 110px;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(800px 600px at 30% 40%, #000, transparent 75%);
}
.hero-inner { position: relative; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.hero-eyebrow {
  display: inline-block; font-size: .78rem; letter-spacing: .3em;
  color: var(--lime); border: 1px solid rgba(180,240,76,.4);
  padding: 6px 16px; border-radius: 999px; margin-bottom: 26px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 5.2rem);
  line-height: 1.05; letter-spacing: .02em; text-transform: uppercase;
}
.hero h1 em { font-style: normal; color: var(--lime); }
.hero .hero-lead {
  margin-top: 26px; max-width: 560px;
  font-size: 1.02rem; color: rgba(255,255,255,.82);
}
.hero-actions { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-weight: 700; font-size: .95rem; letter-spacing: .06em;
  padding: 15px 34px; border-radius: 999px;
  transition: transform .15s, opacity .2s, box-shadow .2s;
  border: 0; cursor: pointer;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--lime); color: var(--green-deep); box-shadow: 0 8px 24px rgba(180,240,76,.25); }
.btn-outline { border: 1.5px solid rgba(255,255,255,.5); color: #fff; }
.btn-outline:hover { border-color: var(--lime); color: var(--lime); }
.btn-dark { background: var(--green); color: #fff; }
.btn-store { background: var(--green); color: #fff; width: 100%; padding: 18px; font-size: 1.05rem; }
.btn-store:hover { background: var(--green-deep); }
.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section.alt { background: var(--white); }
.section-head { margin-bottom: 54px; }
.section-head .en {
  font-family: var(--font-display); text-transform: uppercase;
  font-size: clamp(1.9rem, 4vw, 2.8rem); letter-spacing: .04em; line-height: 1.1;
}
.section-head .en::after {
  content: ""; display: block; width: 56px; height: 4px;
  background: var(--lime); margin-top: 14px; border-radius: 2px;
}
.section-head .ja { margin-top: 14px; color: var(--ink-soft); font-size: .95rem; letter-spacing: .06em; }
.section-head.center { text-align: center; }
.section-head.center .en::after { margin-inline: auto; }

/* ---------- Feature grid ---------- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 36px 30px;
  transition: transform .2s, box-shadow .2s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(16,21,17,.08); }
.feature-card .icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: var(--green); color: var(--lime);
  display: grid; place-items: center; margin-bottom: 22px;
}
.feature-card h3 { font-size: 1.08rem; margin-bottom: 10px; letter-spacing: .04em; }
.feature-card p { font-size: .9rem; color: var(--ink-soft); }

/* ---------- Product cards ---------- */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 28px; }
.product-card {
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
  transition: transform .2s, box-shadow .2s;
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-5px); box-shadow: 0 18px 44px rgba(16,21,17,.1); }
.product-thumb { aspect-ratio: 4/3; position: relative; overflow: hidden; }
.product-thumb .badge {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  background: var(--green-deep); color: var(--lime);
  font-size: .68rem; font-weight: 700; letter-spacing: .12em;
  padding: 5px 12px; border-radius: 999px;
}
.product-body { padding: 22px 22px 26px; display: flex; flex-direction: column; flex: 1; }
.product-body .cat { font-size: .72rem; letter-spacing: .18em; color: var(--copper); font-weight: 700; text-transform: uppercase; }
.product-body h3 { font-size: 1.05rem; margin: 8px 0 6px; line-height: 1.4; }
.product-body .desc { font-size: .84rem; color: var(--ink-soft); flex: 1; }
.product-body .price { margin-top: 14px; font-family: var(--font-display); font-size: 1.3rem; letter-spacing: .04em; }
.product-body .price small { font-size: .7rem; color: var(--ink-soft); font-family: var(--font-body); margin-left: 6px; }
.product-body .btn { margin-top: 16px; padding: 12px 20px; font-size: .85rem; }

/* ---------- Media placeholders (画像・動画エリア) ---------- */
.media-ph {
  position: relative; display: grid; place-items: center;
  background:
    radial-gradient(400px 260px at 70% 20%, rgba(180,240,76,.25), transparent 65%),
    linear-gradient(150deg, #10382c, #092820);
  color: rgba(255,255,255,.85); width: 100%; height: 100%;
}
.media-ph .ph-label {
  position: absolute; bottom: 10px; right: 12px;
  font-size: .62rem; letter-spacing: .12em; color: rgba(255,255,255,.45);
}
.video-area {
  aspect-ratio: 16/9; border-radius: var(--radius); overflow: hidden;
  position: relative; cursor: pointer;
  background:
    radial-gradient(600px 400px at 30% 30%, rgba(200,162,74,.25), transparent 60%),
    linear-gradient(140deg, #0d332a 0%, #061e17 100%);
  display: grid; place-items: center;
}
.video-area .play {
  width: 84px; height: 84px; border-radius: 50%;
  background: rgba(180,240,76,.95); display: grid; place-items: center;
  box-shadow: 0 12px 40px rgba(0,0,0,.4); transition: transform .2s;
}
.video-area:hover .play { transform: scale(1.08); }
.video-area .vlabel {
  position: absolute; bottom: 20px; left: 24px; color: rgba(255,255,255,.85);
  font-size: .85rem; letter-spacing: .1em;
}

/* ---------- Split section ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.split .visual { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3; }
.split h2 { font-family: var(--font-display); font-size: clamp(1.6rem, 3vw, 2.3rem); text-transform: uppercase; line-height: 1.2; margin-bottom: 18px; }
.split p { color: var(--ink-soft); font-size: .95rem; margin-bottom: 14px; }

/* ---------- News ---------- */
.news-list li { border-bottom: 1px solid var(--line); }
.news-list a { display: flex; gap: 28px; padding: 20px 8px; align-items: baseline; transition: background .2s; }
.news-list a:hover { background: rgba(180,240,76,.08); }
.news-list time { font-family: var(--font-display); font-size: .85rem; color: var(--copper); letter-spacing: .06em; white-space: nowrap; }
.news-list .tag {
  font-size: .68rem; font-weight: 700; letter-spacing: .1em;
  background: var(--green); color: #fff; padding: 3px 12px; border-radius: 999px; white-space: nowrap;
}

/* ---------- CTA band ---------- */
.cta-band {
  background:
    radial-gradient(700px 300px at 80% 50%, rgba(180,240,76,.2), transparent 65%),
    linear-gradient(120deg, #0e3b2e, #061e17);
  color: #fff; text-align: center; padding: 90px 24px; border-radius: 0;
}
.cta-band h2 { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.8rem); text-transform: uppercase; letter-spacing: .04em; }
.cta-band p { margin: 18px auto 34px; max-width: 560px; color: rgba(255,255,255,.8); font-size: .95rem; }

/* ---------- Page hero (subpages) ---------- */
.page-hero {
  background: linear-gradient(150deg, #0b2f25, #051a14);
  color: #fff; padding: 150px 0 70px; position: relative; overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; right: -80px; bottom: -120px;
  width: 380px; height: 380px; border-radius: 50%;
  border: 60px solid rgba(180,240,76,.08);
}
.page-hero .en { font-family: var(--font-display); font-size: clamp(2rem, 5vw, 3.4rem); text-transform: uppercase; letter-spacing: .04em; }
.page-hero .ja { color: var(--lime); font-size: .85rem; letter-spacing: .22em; margin-top: 8px; }
.breadcrumb { font-size: .75rem; color: rgba(255,255,255,.55); margin-top: 22px; letter-spacing: .06em; }
.breadcrumb a:hover { color: var(--lime); }

/* ---------- Product detail ---------- */
.pd-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: start; }
.pd-gallery .main { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3; }
.pd-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 12px; }
.pd-thumbs .t { aspect-ratio: 1; border-radius: 10px; overflow: hidden; border: 2px solid transparent; cursor: pointer; }
.pd-thumbs .t:hover { border-color: var(--lime); }
.pd-info .cat { font-size: .75rem; letter-spacing: .2em; color: var(--copper); font-weight: 700; text-transform: uppercase; }
.pd-info h1 { font-size: clamp(1.5rem, 3vw, 2.1rem); line-height: 1.3; margin: 10px 0 4px; }
.pd-info .en-name { font-family: var(--font-display); color: var(--ink-soft); letter-spacing: .1em; font-size: .9rem; text-transform: uppercase; }
.pd-info .price { font-family: var(--font-display); font-size: 2rem; margin: 22px 0 4px; }
.pd-info .price small { font-size: .75rem; font-family: var(--font-body); color: var(--ink-soft); margin-left: 8px; }
.pd-info .lead { color: var(--ink-soft); font-size: .93rem; margin: 18px 0 26px; }
.store-note { font-size: .75rem; color: var(--ink-soft); margin-top: 10px; text-align: center; }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 18px; font-size: .88rem; }
.spec-table th, .spec-table td { border-bottom: 1px solid var(--line); padding: 13px 10px; text-align: left; }
.spec-table th { width: 34%; color: var(--ink-soft); font-weight: 500; background: rgba(227,224,216,.25); }
.pd-points { margin: 22px 0; display: grid; gap: 12px; }
.pd-points li { display: flex; gap: 12px; align-items: flex-start; font-size: .9rem; }
.pd-points .check { color: var(--green); flex-shrink: 0; margin-top: 4px; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 56px; align-items: start; }
.contact-form { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 40px; }
.form-row { margin-bottom: 22px; }
.form-row label { display: block; font-size: .85rem; font-weight: 700; margin-bottom: 8px; }
.form-row label .req { color: #c0392b; font-size: .7rem; margin-left: 8px; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; padding: 13px 16px; font-size: .95rem; font-family: inherit;
  border: 1.5px solid var(--line); border-radius: 10px; background: var(--paper);
  transition: border-color .2s;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  outline: none; border-color: var(--green); background: #fff;
}
.form-row textarea { min-height: 150px; resize: vertical; }
.form-success {
  display: none; background: rgba(180,240,76,.18); border: 1.5px solid var(--lime);
  border-radius: 10px; padding: 20px; font-size: .9rem; margin-bottom: 20px;
}
.contact-side h3 { font-size: 1rem; margin: 26px 0 8px; }
.contact-side p { font-size: .88rem; color: var(--ink-soft); }

/* ---------- FAQ ---------- */
.faq-item { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; }
.faq-item summary {
  cursor: pointer; padding: 22px 26px; font-weight: 700; font-size: .95rem;
  display: flex; gap: 14px; align-items: baseline; list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .q { color: var(--copper); font-family: var(--font-display); font-size: 1.1rem; }
.faq-item[open] summary { border-bottom: 1px solid var(--line); }
.faq-item .a { padding: 20px 26px; font-size: .9rem; color: var(--ink-soft); display: flex; gap: 14px; }
.faq-item .a .mark { color: var(--green); font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; }

/* ---------- Footer ---------- */
.site-footer { background: var(--green-deep); color: rgba(255,255,255,.75); padding: 70px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 50px; }
.site-footer .logo { color: #fff; margin-bottom: 16px; }
.site-footer p { font-size: .8rem; }
.site-footer h4 { color: #fff; font-size: .8rem; letter-spacing: .18em; margin-bottom: 16px; text-transform: uppercase; }
.site-footer li { margin-bottom: 10px; }
.site-footer li a { font-size: .85rem; transition: color .2s; }
.site-footer li a:hover { color: var(--lime); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12); padding-top: 24px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: .72rem; color: rgba(255,255,255,.45);
}

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.on { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .features { grid-template-columns: 1fr; }
  .split, .pd-grid, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 68px 0; }
}
@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .gnav {
    position: fixed; inset: 0; background: rgba(6,30,23,.97);
    display: grid; place-items: center;
    opacity: 0; pointer-events: none; transition: opacity .25s;
  }
  body.nav-open .gnav { opacity: 1; pointer-events: auto; }
  .gnav ul { flex-direction: column; gap: 30px; text-align: center; }
  .gnav a { font-size: 1.1rem; }
  .hero { padding: 140px 0 80px; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .news-list a { flex-wrap: wrap; gap: 10px; }
  .contact-form { padding: 26px 20px; }
}