/* ===== 共通デザインシステム ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --primary-xlight: #eff6ff;
  --success: #16a34a;
  --success-light: #dcfce7;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --purple: #7c3aed;
  --purple-light: #ede9fe;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.06);
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --font: 'Hiragino Kaku Gothic ProN','Hiragino Sans','Meiryo',sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: #f8faff;
  color: var(--gray-800);
  line-height: 1.7;
  font-size: 15px;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

/* ===== NAVBAR ===== */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-200);
  padding: 0 20px;
  height: 60px;
  display: flex; align-items: center; justify-content: space-between;
  box-shadow: var(--shadow-sm);
}
.navbar .logo {
  font-size: 17px; font-weight: 800;
  color: var(--primary); white-space: nowrap;
  display: flex; align-items: center; gap: 6px;
}
.navbar .logo span { color: var(--gray-800); }
.nav-links {
  display: flex; gap: 4px; align-items: center;
  list-style: none; flex-wrap: wrap;
}
.nav-links a {
  font-size: 13px; font-weight: 600;
  color: var(--gray-600); padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active {
  background: var(--primary-light); color: var(--primary);
  text-decoration: none;
}
.nav-links .btn-calc {
  background: var(--primary); color: white !important;
  border-radius: 20px; padding: 6px 14px;
}
.nav-links .btn-calc:hover { background: var(--primary-dark); }

/* ===== FOOTER ===== */
footer {
  background: var(--gray-800);
  color: var(--gray-400);
  padding: 40px 20px 24px;
  margin-top: 80px;
}
.footer-inner {
  max-width: 900px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px;
}
.footer-brand .logo { color: #60a5fa; font-size: 18px; font-weight: 800; }
.footer-brand p { font-size: 13px; margin-top: 8px; line-height: 1.7; }
footer h4 { color: white; font-size: 14px; margin-bottom: 12px; }
footer ul { list-style: none; }
footer ul li { margin-bottom: 8px; }
footer ul a { color: var(--gray-400); font-size: 13px; }
footer ul a:hover { color: white; }
.footer-bottom {
  max-width: 900px; margin: 32px auto 0;
  padding-top: 20px; border-top: 1px solid #374151;
  font-size: 12px; text-align: center;
}
.disclaimer {
  background: #374151; border-radius: var(--radius-sm);
  padding: 12px 16px; font-size: 12px;
  color: var(--gray-400); margin-bottom: 16px;
  line-height: 1.6;
}

/* ===== LAYOUT ===== */
.page-container {
  max-width: 900px; margin: 0 auto; padding: 32px 16px 80px;
}
.page-header {
  text-align: center; padding: 48px 20px 40px;
  background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%);
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: 40px;
}
.page-header .badge {
  display: inline-block;
  background: var(--primary-light); color: var(--primary-dark);
  font-size: 12px; font-weight: 700;
  padding: 4px 14px; border-radius: 99px; margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.page-header h1 {
  font-size: clamp(22px, 5vw, 36px);
  font-weight: 800; color: var(--gray-900);
  line-height: 1.3; margin-bottom: 12px;
}
.page-header h1 em { color: var(--primary); font-style: normal; }
.page-header p { color: var(--gray-600); font-size: 15px; max-width: 600px; margin: 0 auto; }

/* ===== CARDS ===== */
.card {
  background: white; border-radius: var(--radius-lg);
  box-shadow: var(--shadow); padding: 28px;
  margin-bottom: 24px;
}
.card-title {
  font-size: 17px; font-weight: 800;
  color: var(--gray-800); margin-bottom: 20px;
  display: flex; align-items: center; gap: 8px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--primary-light);
}
.card-title .icon { font-size: 22px; }

/* ===== BADGES ===== */
.badge-green {
  display: inline-flex; align-items: center; gap: 4px;
  background: var(--success-light); color: var(--success);
  font-size: 11px; font-weight: 700;
  padding: 3px 10px; border-radius: 99px;
}
.badge-blue {
  display: inline-flex; align-items: center; gap: 4px;
  background: var(--primary-light); color: var(--primary-dark);
  font-size: 11px; font-weight: 700;
  padding: 3px 10px; border-radius: 99px;
}
.badge-orange {
  display: inline-flex; align-items: center; gap: 4px;
  background: var(--warning-light); color: var(--warning);
  font-size: 11px; font-weight: 700;
  padding: 3px 10px; border-radius: 99px;
}
.badge-red {
  display: inline-flex; align-items: center; gap: 4px;
  background: var(--danger-light); color: var(--danger);
  font-size: 11px; font-weight: 700;
  padding: 3px 10px; border-radius: 99px;
}

/* ===== ALERT BOX ===== */
.alert {
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 13px; line-height: 1.7;
  margin: 16px 0;
}
.alert-info { background: var(--primary-light); color: var(--primary-dark); border-left: 3px solid var(--primary); }
.alert-success { background: var(--success-light); color: var(--success); border-left: 3px solid var(--success); }
.alert-warning { background: var(--warning-light); color: var(--warning); border-left: 3px solid var(--warning); }
.alert-danger { background: var(--danger-light); color: var(--danger); border-left: 3px solid var(--danger); }

/* ===== TABLE ===== */
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th {
  background: var(--gray-100); color: var(--gray-700);
  font-weight: 700; padding: 10px 14px;
  text-align: left; font-size: 13px;
}
.tbl td { padding: 10px 14px; border-bottom: 1px solid var(--gray-100); vertical-align: top; }
.tbl tr:last-child td { border-bottom: none; }
.tbl tr:hover td { background: var(--gray-50); }

/* ===== BUTTON ===== */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 12px 24px; border-radius: 99px;
  font-size: 15px; font-weight: 700;
  cursor: pointer; border: none;
  transition: all 0.2s; text-decoration: none;
}
.btn-primary { background: var(--primary); color: white; box-shadow: 0 4px 12px rgba(37,99,235,0.3); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); text-decoration: none; color: white; }
.btn-outline { background: white; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary-light); text-decoration: none; }
.btn-success { background: var(--success); color: white; box-shadow: 0 4px 12px rgba(22,163,74,0.3); }
.btn-success:hover { background: #15803d; transform: translateY(-1px); text-decoration: none; color: white; }
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-sm { padding: 8px 16px; font-size: 13px; }

/* ===== STEP ===== */
.steps { display: flex; flex-direction: column; gap: 0; }
.step-item {
  display: flex; gap: 16px; position: relative;
  padding-bottom: 28px;
}
.step-item:last-child { padding-bottom: 0; }
.step-item::before {
  content: '';
  position: absolute; left: 20px; top: 44px;
  width: 2px; height: calc(100% - 44px);
  background: var(--gray-200);
}
.step-item:last-child::before { display: none; }
.step-num {
  width: 40px; height: 40px; min-width: 40px;
  border-radius: 50%; background: var(--primary);
  color: white; font-weight: 800; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; z-index: 1;
}
.step-content { flex: 1; padding-top: 8px; }
.step-content h3 { font-size: 16px; font-weight: 700; color: var(--gray-800); margin-bottom: 6px; }
.step-content p { font-size: 14px; color: var(--gray-600); line-height: 1.7; }

/* ===== GRID ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* ===== MOBILE ===== */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .footer-inner { grid-template-columns: 1fr; gap: 20px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .card { padding: 20px; }
  .page-header { padding: 32px 16px 28px; }
}