/* --------------------
   Global Styles
-------------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #f9f9f9;
}

/* --------------------
   Navbar
-------------------- */
header {
  background: #ffffff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: #ffb400; /* 主カラーをイエロー基調に変更 */
  text-decoration: none;
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: 1.25rem;
}

.nav-menu a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-menu a:hover {
  color: #ffb400;
}

/* --------------------
   Landing Section
-------------------- */
.section.landing {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  padding: 4rem 1rem;
  background: linear-gradient(135deg, #fff9db 0%, #ffffff 100%); /* パステルイエローのグラデーション */
  text-align: center;
}

.content h1 {
  font-size: clamp(1.5rem, 3vw + 1rem, 2rem);
  margin-bottom: 1.5rem;
  line-height: 1.4;
}

.subtitle {
  font-size: 1rem;
  color: #555;
  margin-bottom: 1rem;
}

.short-desc {
  max-width: 600px;
  margin: 0 auto 2rem;
  font-size: 0.95rem;
  color: #444;
}

/* --------------------
   CTA Buttons
-------------------- */
.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 0.5rem;
  background: #ffb400; /* イエローのボタン */
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s ease;
}

.btn:hover {
  background: #d99800; /* 少し濃いイエロー */
}

/* --------------------
   Footer
-------------------- */
footer {
  background: #ffffff;
  border-top: 1px solid #eee;
  text-align: center;
  padding: 1rem 0;
  font-size: 0.85rem;
  color: #666;
}

/* --------------------
   Responsive
-------------------- */
@media (max-width: 768px) {
  .nav-menu {
    gap: 0.75rem;
  }

  .nav-menu a {
    font-size: 0.9rem;
  }

  .content h1 {
    font-size: 1.25rem;
  }
}