/* style.css */
:root {
  --primary: #0f4c81; /* Corporate Blue */
  --primary-light: #e0f2fe;
  --secondary: #475569;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --text-dark: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --accent: #0284c7;
  --line-green: #06c755;
  --line-hover: #05b04b;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  color: var(--text-dark);
  background-color: var(--bg-light);
  line-height: 1.7;
}
a { text-decoration: none; color: var(--accent); transition: 0.2s; }
a:hover { opacity: 0.8; }
ul { list-style: none; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.bg-white { background: var(--bg-white); }

/* Header */
.header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}
.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}
.logo { font-size: 1.3rem; font-weight: 700; color: var(--primary); letter-spacing: 1px; border-left: 4px solid var(--primary); padding-left: 12px;}
.nav-menu { display: flex; gap: 30px; }
.nav-menu a { color: var(--text-dark); font-weight: 600; font-size: 0.95rem; }
.nav-menu a:hover, .nav-menu a.active { color: var(--primary); }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #0a2540 100%);
  color: white;
  padding: 120px 0;
  text-align: center;
}
.hero h1 { font-size: 2.5rem; margin-bottom: 20px; letter-spacing: 2px; line-height: 1.4; }
.hero p { font-size: 1.1rem; max-width: 700px; margin: 0 auto 30px; color: #cbd5e1; }

/* Buttons */
.btn-line {
  display: inline-block;
  background: var(--line-green);
  color: white;
  padding: 16px 45px;
  border-radius: 4px;
  font-weight: bold;
  font-size: 1.15rem;
  box-shadow: 0 4px 15px rgba(6,199,85,0.3);
  letter-spacing: 1px;
}
.btn-line:hover { background: var(--line-hover); transform: translateY(-2px); color: white; box-shadow: 0 6px 20px rgba(6,199,85,0.4); }
.btn-outline {
  display: inline-block;
  border: 2px solid var(--primary);
  color: var(--primary);
  padding: 12px 30px;
  border-radius: 4px;
  font-weight: 600;
}
.btn-outline:hover { background: var(--primary); color: white; }

/* Grid / Cards */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.card { background: var(--bg-white); border: 1px solid var(--border); padding: 35px; border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,0.02); }
.card h3 { color: var(--primary); border-bottom: 2px solid var(--primary-light); padding-bottom: 12px; margin-bottom: 15px; font-size: 1.3rem;}

/* Page Header (Subpages) */
.page-header { background: linear-gradient(90deg, #1e293b 0%, #0f172a 100%); color: white; padding: 70px 0; text-align: center; }
.page-header h1 { font-size: 2.2rem; letter-spacing: 2px; }
.page-header p { color: #94a3b8; margin-top: 10px; }

/* Content Area (Subpages) */
.content-area { background: var(--bg-white); padding: 50px; border-radius: 8px; border: 1px solid var(--border); margin-top: -40px; position: relative; box-shadow: 0 10px 30px rgba(0,0,0,0.05); margin-bottom: 60px;}
.content-area h2 { color: var(--primary); margin-top: 40px; margin-bottom: 20px; font-size: 1.6rem; border-left: 5px solid var(--primary); padding-left: 15px; }
.content-area h2:first-child { margin-top: 0; }
.content-area p { margin-bottom: 20px; color: var(--secondary); font-size: 1.05rem; }
.content-area ul { margin-bottom: 20px; padding-left: 20px; }
.content-area ul li { color: var(--secondary); margin-bottom: 10px; list-style-type: disc; }

/* Footer */
.footer { background: #0b1120; color: #cbd5e1; padding: 70px 0 30px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 50px; margin-bottom: 50px; }
.footer h4 { color: white; margin-bottom: 25px; font-size: 1.15rem; border-bottom: 1px solid #1e293b; padding-bottom: 12px; }
.footer ul li { margin-bottom: 12px; font-size: 0.95rem; }
.footer ul a { color: #94a3b8; }
.footer ul a:hover { color: white; }
.copyright { text-align: center; border-top: 1px solid #1e293b; padding-top: 25px; font-size: 0.85rem; color: #64748b; }
.legal-warning { font-size: 0.8rem; color: #94a3b8; line-height: 1.8; margin-top: 20px; padding: 20px; background: rgba(255,255,255,0.03); border: 1px solid #1e293b; border-radius: 4px; }

/* Mobile */
@media (max-width: 768px) {
  .hero { padding: 80px 0; }
  .hero h1 { font-size: 1.8rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .content-area { padding: 30px 20px; }
}

/* Form Styles */
.contact-form {
  max-width: 750px;
  margin: 0 auto;
  background: #f8fafc;
  padding: 50px;
  border-radius: 8px;
  border: 1px solid var(--border);
  box-shadow: 0 4px 15px rgba(0,0,0,0.02);
}
.form-group {
  margin-bottom: 25px;
}
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-dark);
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 15px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.3s;
  background: white;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  padding: 10px 0;
}
.checkbox-group label {
  font-weight: normal;
  display: flex;
  align-items: center;
  cursor: pointer;
  background: white;
  padding: 10px 15px;
  border: 1px solid var(--border);
  border-radius: 4px;
}
.checkbox-group label:hover {
  border-color: var(--primary);
}
.checkbox-group input {
  margin-right: 8px;
  cursor: pointer;
}