:root {
  --bg:#0b0f14;
  --card:#0f151d;
  --fg:#e8f1ff;
  --muted:#9bb0c6;
  --accent:#00d0ff;
  --accent2:#ff7ab5;
  --max:1120px;
  --radius:18px;
}

* {
  box-sizing:border-box;
}

html,
body {
  margin:0;
  background:linear-gradient(180deg,#071019, #0b1220 40%, #0b0f14);
  color:var(--fg);
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
}

a {
  color:var(--accent);
  text-decoration:none;
}

a:hover {
  text-decoration:underline;
}

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

/* HEADER */
header {
  position:sticky;
  top:0;
  backdrop-filter:saturate(140%) blur(8px);
  background:rgba(9,16,26,.6);
  border-bottom:1px solid rgba(255,255,255,.06);
  z-index:40;
}

nav {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.brand {
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  letter-spacing:.4px;
}

.brand .dot {
  width:10px;
  height:10px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  display:inline-block;
}

.menu {
  display:flex;
  gap:18px;
  align-items:center;
}

/* BUTTONS */
.btn,
button.btn {
  display:inline-flex;
  align-items:center;
  gap:8px;
  border:1px solid rgba(255,255,255,.14);
  padding:10px 14px;
  border-radius:999px;
  background:transparent;
  color:var(--fg);
  font-weight:600;
  cursor:pointer;
}

.btn.primary {
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  border:0;
  color:#001018;
}

/* HERO */
.hero {
  display:grid;
  grid-template-columns:1.15fr 1fr;
  gap:28px;
  align-items:center;
  padding:56px 0;
}

.kicker {
  color:var(--accent);
  font-weight:700;
  letter-spacing:.3px;
  font-size:14px;
  text-transform:uppercase;
}

h1 {
  font-size:48px;
  line-height:1.05;
  margin:.3em 0 .4em;
}

.lead {
  font-size:18px;
  color:var(--muted);
}

.cta {
  display:flex;
  gap:12px;
  margin-top:18px;
}

.hero-img {
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:0 30px 70px rgba(0,0,0,.35);
  border:1px solid rgba(255,255,255,.06);
}

.hero-img img {
  width:100%;
  height:auto;
  display:block;
}

/* SECTIONS */
section {
  padding:48px 0;
  border-top:1px solid rgba(255,255,255,.06);
}

h2 {
  font-size:28px;
  margin:0 0 18px;
}

.muted {
  color:var(--muted);
}

.grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}

.card {
  background:var(--card);
  border:1px solid rgba(255,255,255,.06);
  border-radius:var(--radius);
  overflow:hidden;
}

.card img {
  width:100%;
  display:block;
}

.card .pad {
  padding:16px;
}

.eyebrow {
  font-size:12px;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:.2px;
}

.h3 {
  font-size:18px;
  font-weight:700;
  margin:6px 0 8px;
}

/* SUBSCRIBE */
.subscribe-input {
  flex:1;
  min-width:240px;
  padding:12px 14px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.18);
  background:#0b1220;
  color:var(--fg);
}

.subscribe-note {
  margin-top:8px;
}

/* FOOTER */
footer {
  padding:32px 0 56px;
  color:var(--muted);
}

.cols {
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:18px;
}

.cols ul {
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  gap:10px;
}

/* MODAL */
dialog {
  border:0;
  border-radius:16px;
  padding:0;
  background:#000a;
}

.modal {
  width:min(960px, 92vw);
  background:#000;
  border-radius:16px;
  overflow:hidden;
}

.modal header {
  position:relative;
  background:#000;
  padding:10px;
}

.modal header button {
  position:absolute;
  right:10px;
  top:10px;
}

.modal .frame {
  aspect-ratio:16/9;
  width:100%;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero {
    grid-template-columns:1fr;
    gap:18px;
  }

  h1 {
    font-size:38px;
  }

  .grid {
    grid-template-columns:1fr;
  }

  .cols {
    grid-template-columns:1fr 1fr;
  }
}
/* 言語切替の基本スタイル */
.lang-switch {
  display:inline-flex;
  align-items:center;
  gap:4px;
  margin-left:8px;
  font-size:13px;
}

.lang-switch .lang {
  color:var(--muted);
  text-decoration:none;
}

.lang-switch .lang.active {
  font-weight:800;
  color:var(--accent);
}

.lang-sep {
  color:var(--muted);
  font-size:12px;
}

/* スマホ（幅600px以下）での調整 */
@media (max-width: 600px) {
  nav {
    flex-wrap:wrap;
    align-items:flex-start;
  }

  .menu {
    width:100%;
    justify-content:flex-start;
    flex-wrap:wrap;
    gap:8px 12px;
    font-size:13px;
  }

  .menu .btn {
    padding:8px 10px;
    font-size:13px;
  }

  .lang-switch {
    margin-left:auto;      /* 右に寄せる */
    font-size:12px;
  }

  .lang-switch .lang {
    padding:2px 4px;
  }
}