:root {
  --green: #22c55e;
  --teal: #14b8a6;
  --blue: #3b82f6;
  --grad: linear-gradient(135deg, #22c55e 0%, #14b8a6 50%, #3b82f6 100%);
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --bg: #f8fafc;
  --white: #ffffff;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,.08);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { background: #fff; }
body {
  font-family: 'Hiragino Sans', 'Noto Sans JP', 'Yu Gothic', sans-serif;
  color: var(--text);
  background: transparent;
  line-height: 1.7;
  font-size: 16px;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }

/* ===== HEADER ===== */
header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 150px;
}
.logo {
  font-size: 1.4rem; font-weight: 800; letter-spacing: -.5px;
  background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  font-size: .9rem; color: var(--muted); font-weight: 500;
  transition: color .2s;
}
.nav-links a:hover { color: var(--teal); }
.nav-cta {
  background: var(--grad); color: #fff !important;
  padding: 8px 20px; border-radius: 999px;
  font-weight: 600; font-size: .85rem;
  -webkit-text-fill-color: #fff;
  transition: opacity .2s;
}
.nav-cta:hover { opacity: .85; }
.nav-login {
  border: 1.5px solid var(--teal); color: var(--teal) !important;
  padding: 7px 18px; border-radius: 999px;
  font-weight: 600; font-size: .85rem;
  -webkit-text-fill-color: var(--teal);
  transition: background .2s, color .2s;
}
.nav-login:hover { background: var(--teal); color: #fff !important; -webkit-text-fill-color: #fff; }

/* ===== FOOTER ===== */
footer {
  background: var(--text); color: #94a3b8;
  padding: 48px 24px 32px;
}
.footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; flex-wrap: wrap; gap: 40px;
  justify-content: space-between; align-items: flex-start;
}
.footer-brand .logo { font-size: 1.2rem; }
.footer-brand p { font-size: .82rem; margin-top: 8px; color: #64748b; }
.footer-links { display: flex; gap: 48px; flex-wrap: wrap; }
.footer-col h4 { font-size: .8rem; color: #cbd5e1; font-weight: 700; margin-bottom: 12px; letter-spacing: .05em; text-transform: uppercase; }
.footer-col a { display: block; font-size: .85rem; color: #64748b; margin-bottom: 8px; transition: color .2s; }
.footer-col a:hover { color: var(--teal); }
.footer-bottom {
  max-width: 1100px; margin: 32px auto 0;
  border-top: 1px solid #334155; padding-top: 20px;
  font-size: .8rem; color: #475569; text-align: center;
}

/* ===== CONTAINERS ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; position: relative; z-index: 1; }
.section-sm { padding: 48px 0; position: relative; z-index: 1; }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(160deg, rgba(240,253,244,.75) 0%, rgba(240,253,250,.75) 50%, rgba(239,246,255,.75) 100%);
  padding: 60px 24px 70px;
  text-align: center;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-block;
  background: var(--grad); color: #fff;
  font-size: .78rem; font-weight: 700;
  padding: 4px 14px; border-radius: 999px;
  margin-bottom: 20px; letter-spacing: .05em;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900; line-height: 1.25;
  letter-spacing: -.03em; margin-bottom: 20px;
}
.hero h1 span { background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 1.1rem; color: var(--muted); max-width: 560px; margin: 0 auto 36px; }
.btn-group { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  background: var(--grad); color: #fff;
  padding: 14px 32px; border-radius: 999px;
  font-weight: 700; font-size: 1rem;
  box-shadow: 0 4px 20px rgba(20,184,166,.35);
  transition: transform .2s, box-shadow .2s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(20,184,166,.4); }
.btn-outline {
  border: 2px solid var(--teal); color: var(--teal);
  padding: 12px 30px; border-radius: 999px;
  font-weight: 700; font-size: 1rem;
  transition: background .2s, color .2s;
}
.btn-outline:hover { background: var(--teal); color: #fff; }

/* ===== CARDS ===== */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.card {
  background: rgba(255,255,255,0.82); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s;
  backdrop-filter: blur(4px);
}
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,.12); }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--grad); display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 20px;
}
.card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.card p { font-size: .9rem; color: var(--muted); }

/* ===== SECTION TITLE ===== */
.section-title { text-align: center; margin-bottom: 56px; }
.section-title h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -.02em; margin-bottom: 12px; }
.section-title p { color: var(--muted); font-size: 1rem; }

/* ===== PRICING ===== */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.price-card {
  border: 2px solid var(--border); border-radius: var(--radius);
  padding: 36px; text-align: center;
  transition: transform .2s, border-color .2s;
}
.price-card:hover { transform: translateY(-4px); border-color: var(--teal); }
.price-card.featured {
  background: var(--grad); color: #fff; border-color: transparent;
  box-shadow: 0 12px 40px rgba(20,184,166,.35);
}
.price-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; letter-spacing: .05em; }
.price-card .price { font-size: 2.6rem; font-weight: 900; letter-spacing: -.03em; }
.price-card .price span { font-size: 1rem; font-weight: 500; }
.price-card ul { list-style: none; margin: 24px 0; text-align: left; }
.price-card ul li { padding: 6px 0; font-size: .9rem; border-bottom: 1px solid rgba(0,0,0,.06); }
.price-card.featured ul li { border-bottom-color: rgba(255,255,255,.15); }
.price-card ul li::before { content: "✓　"; color: var(--teal); font-weight: 700; }
.price-card.featured ul li::before { color: #fff; }

/* ===== PAGE HEADER (内部ページ用) ===== */
.page-hero {
  background: linear-gradient(160deg, #f0fdf4 0%, #f0fdfa 60%, #eff6ff 100%);
  padding: 60px 24px 48px; text-align: center;
}
.page-hero h1 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); font-weight: 800; margin-bottom: 8px; }
.page-hero p { color: var(--muted); font-size: .95rem; }

/* ===== PROSE (規約・プライバシー等) ===== */
.prose {
  max-width: 800px; margin: 0 auto; padding: 60px 24px;
}
.prose h2 {
  font-size: 1.2rem; font-weight: 700;
  margin: 40px 0 12px; padding-left: 12px;
  border-left: 4px solid var(--teal); color: var(--text);
}
.prose h3 { font-size: 1rem; font-weight: 700; margin: 24px 0 8px; }
.prose p { color: #475569; margin-bottom: 14px; font-size: .95rem; }
.prose ul { padding-left: 1.5em; margin-bottom: 14px; }
.prose ul li { color: #475569; font-size: .95rem; margin-bottom: 6px; }
.prose table { width: 100%; border-collapse: collapse; margin-bottom: 24px; font-size: .9rem; }
.prose table th { background: var(--bg); padding: 12px 16px; border: 1px solid var(--border); font-weight: 700; text-align: left; }
.prose table td { padding: 12px 16px; border: 1px solid var(--border); color: #475569; }
.prose .updated { font-size: .82rem; color: var(--muted); margin-bottom: 32px; }

/* ===== CONTACT ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-form { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow); }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--border);
  border-radius: 8px; font-size: .95rem; font-family: inherit;
  transition: border-color .2s; outline: none; background: var(--bg);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--teal); background: #fff; }
.form-group textarea { min-height: 140px; resize: vertical; }
.btn-submit {
  width: 100%; padding: 14px; background: var(--grad); color: #fff;
  border: none; border-radius: 999px; font-size: 1rem; font-weight: 700;
  cursor: pointer; transition: opacity .2s;
}
.btn-submit:hover { opacity: .85; }
.contact-info h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; }
.contact-info p { color: var(--muted); font-size: .9rem; margin-bottom: 24px; }
.info-item { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 20px; }
.info-icon { width: 40px; height: 40px; border-radius: 10px; background: var(--grad); display: flex; align-items: center; justify-content: center; font-size: 1rem; flex-shrink: 0; }
.info-text strong { display: block; font-size: .85rem; font-weight: 700; margin-bottom: 2px; }
.info-text span { font-size: .85rem; color: var(--muted); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero { padding: 72px 20px 60px; }
  .section { padding: 56px 0; }
}