/* =========================
   Base
========================= */
html, body {
  margin: 0;
  padding: 0;
  font-family: 'Hiragino Kaku Gothic Pro', 'Meiryo', sans-serif;
  color: #fff;
  background: #000;
}

/* =========================
   Hero
========================= */
.hero {
  position: relative;
  height: 100vh;
  background: url('../images/bg_v2.webp') no-repeat center center/cover;
}
.hero .overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.12);
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  top: 30%;
  transform: translateY(-40%);
  padding: 0 20px;
}
.hero .logo {
  max-width: 60%;
  height: auto;
  margin-bottom: 20px;
}

/* 黒帯＋影で可読性UP（h1強制改行済み） */
.hero-content h1,
.hero-content p {
  background: rgba(0,0,0,0.35);
  display: inline-block;
  padding: 10px 20px;
  border-radius: 6px;
  text-shadow: 2px 2px 6px rgba(0,0,0,0.5);
  line-height: 1.5;
  margin: 10px 0;
}
.hero-content h1 {
  margin: 20px 0;
  font-size: 2.5rem;
  font-weight: 700;
}
.hero-content p {
  font-size: 1.1rem;
}

/* =========================
   CTA Buttons
========================= */
.buttons .btn {
  margin: 0 10px;
  padding: 12px 24px;
  background: linear-gradient(90deg, #005A9C, #1E90FF);
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
  font-weight: bold;
  transition: 0.3s;
  display: inline-block;
}
.buttons .btn:hover {
  background: #fff;
  color: #005A9C;
  border: 2px solid #005A9C;
}

/* =========================
   Concept
========================= */
.concept {
  padding: 60px 20px;
  background: #111;
  text-align: center;
}
.concept h2 {
  font-size: 2rem;
  margin-bottom: 20px;
}
.concept p {
  font-size: 1.1rem;
  line-height: 1.8;
}

/* =========================
   Footer
========================= */
footer {
  padding: 24px 16px 32px;
  background: #000;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.08);
}
footer a {
  color: #fff;
  text-decoration: none;
}
footer a:hover { text-decoration: underline; }

.footer-brand p { margin: 6px 0; }

.footer-links {
  margin: 8px 0 16px;
  font-size: 0.95rem;
  opacity: 0.9;
}
.footer-links .dot { margin: 0 8px; opacity: 0.6; }

.footer-social img {
  width: 32px; height: 32px;
  display: inline-block;
  vertical-align: middle;
  transition: transform 0.2s ease;
}
.footer-social img:hover { transform: scale(1.08); }

/* =========================
   Responsive
========================= */
@media (max-width: 768px) {
  .hero .logo { max-width: 90%; }
  .hero-content h1 { font-size: 1.6rem; }
  .hero-content p  { font-size: 1rem; }
  .buttons .btn    { display: block; margin: 10px auto; max-width: 260px; }
}