:root {
  --green: #3a9b4e;
  --green-dark: #2e7d3e;
  --green-light: #e9f7ec;
  --accent: #f0a500;
  --ink: #1f2a23;
  --muted: #5d6b62;
  --bg: #ffffff;
  --bg-soft: #f4faf5;
  --radius: 18px;
  --shadow: 0 12px 32px rgba(46, 125, 62, 0.12);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(46, 125, 62, 0.08);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
}

.brand img { width: 34px; height: 34px; border-radius: 9px; }

.site-nav { display: flex; align-items: center; gap: 22px; }

.site-nav a { color: var(--muted); font-weight: 600; font-size: 0.95rem; transition: color 0.2s; }

.site-nav a:hover { color: var(--green); }

.nav-cta {
  background: var(--green);
  color: #fff !important;
  padding: 8px 18px;
  border-radius: 999px;
}

.nav-cta:hover { background: var(--green-dark); }

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 40px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 80px 24px 90px;
}

.eyebrow {
  display: inline-block;
  color: var(--green-dark);
  background: var(--green-light);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero-copy h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.accent { color: var(--green); }

.lead {
  margin: 22px 0 32px;
  font-size: 1.08rem;
  color: var(--muted);
}

.cta-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }

.requirement { margin-top: 16px; font-size: 0.85rem; color: var(--muted); }

/* App Store badge (Apple 公式バッジ) */
.appstore-badge {
  display: inline-block;
  transition: transform 0.15s;
}

.appstore-badge img { height: 52px; width: auto; }

.appstore-badge:hover { transform: translateY(-2px); }

.appstore-badge.large img { height: 60px; }

.ghost-btn {
  border: 2px solid var(--green);
  color: var(--green-dark);
  font-weight: 700;
  padding: 11px 22px;
  border-radius: 12px;
  transition: background 0.2s, color 0.2s;
}

.ghost-btn:hover { background: var(--green); color: #fff; }

/* Hero visual */
.hero-visual { position: relative; display: flex; justify-content: center; }

.hero-visual img {
  position: relative;
  width: 100%;
  max-width: 380px;
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.phone-glow {
  position: absolute;
  inset: -20px;
  background: radial-gradient(circle at center, rgba(58, 155, 78, 0.25), transparent 65%);
  filter: blur(20px);
  z-index: 0;
}

/* ---------- Sections ---------- */
.section-title {
  text-align: center;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 48px;
}

.features { background: var(--bg-soft); padding: 80px 24px; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1040px;
  margin: 0 auto;
}

.feature-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 34px 28px;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.feature-card:hover { transform: translateY(-4px); }

.feature-icon {
  width: 58px; height: 58px;
  display: grid; place-items: center;
  font-size: 1.7rem;
  background: var(--green-light);
  border-radius: 14px;
  margin-bottom: 18px;
}

.feature-card h3 { font-size: 1.25rem; margin-bottom: 10px; }

.feature-card p { color: var(--muted); font-size: 0.98rem; }

/* How it works */
.how { padding: 90px 24px; max-width: 1040px; margin: 0 auto; }

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.steps li { position: relative; padding-top: 12px; }

.step-num {
  display: grid; place-items: center;
  width: 46px; height: 46px;
  background: var(--green);
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
  border-radius: 50%;
  margin-bottom: 16px;
}

.steps h3 { font-size: 1.2rem; margin-bottom: 8px; }

.steps p { color: var(--muted); }

/* Final CTA */
.final-cta {
  text-align: center;
  background: linear-gradient(160deg, var(--green) 0%, var(--green-dark) 100%);
  color: #fff;
  padding: 80px 24px;
}

.final-icon {
  width: 88px; height: 88px;
  border-radius: 20px;
  margin: 0 auto 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

.final-cta h2 { font-size: clamp(1.5rem, 4vw, 2rem); margin-bottom: 30px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #cdd6cf; padding: 40px 24px; }

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1040px;
  margin: 0 auto 18px;
}

.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: #fff; }

.footer-brand img { width: 30px; height: 30px; border-radius: 8px; }

.footer-links { display: flex; gap: 22px; }

.footer-links a { color: #cdd6cf; font-size: 0.92rem; transition: color 0.2s; }

.footer-links a:hover { color: #fff; }

.credit { text-align: center; font-size: 0.85rem; color: #aeb8b0; margin-bottom: 8px; }

.credit a { color: #cdd6cf; text-decoration: underline; }

.credit a:hover { color: #fff; }

.credit-mark { color: #cdd6cf; font-weight: 600; }

.copyright { text-align: center; font-size: 0.8rem; color: #8a958c; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 50px; }
  .hero-copy .cta-row { justify-content: center; }
  .hero-visual { order: -1; }
  .hero-visual img { max-width: 280px; }
  .feature-grid, .steps { grid-template-columns: 1fr; }
  .step-num { margin-left: auto; margin-right: auto; }
}

@media (max-width: 560px) {
  .site-nav { gap: 14px; }
  .site-nav a:not(.nav-cta) { display: none; }
}