/* ==========================================================
   子どもの成長曲線チェッカー — 共通トークン & ベーススタイル
   ========================================================== */
:root {
  --teal: #1FA89B;
  --teal-dark: #14897E;
  --teal-deep: #0E6F66;
  --teal-soft: #E2F4F1;
  --teal-tint: #F0FAF8;
  --coral: #F0685C;
  --coral-dark: #E3544A;
  --coral-soft: #FDEDE9;
  --cream: #FCF6E6;
  --cream-deep: #FAF0D8;
  --sky: #EAF6FA;
  --sky-deep: #D9EEF5;
  --ink: #3D4A52;
  --ink-soft: #5C6B74;
  --ink-faint: #8B989F;
  --line: #E4ECEE;
  --yellow: #F4C443;
  --pink: #F2A4B4;
  --band-pink: #F8D8DD;
  --band-blue: #CCDFF1;
  --band-teal: #BCE5DD;
  --white: #FFFFFF;
  --font-round: 'M PLUS Rounded 1c', 'Zen Maru Gothic', 'Hiragino Maru Gothic ProN', sans-serif;
  --radius-card: 18px;
  --radius-pill: 999px;
  --shadow-card: 0 6px 22px rgba(31, 122, 112, 0.08);
  --shadow-pop: 0 12px 34px rgba(31, 122, 112, 0.14);
  --maxw: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  font-family: var(--font-round);
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.btn-cta {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  background: linear-gradient(180deg, var(--coral), var(--coral-dark));
  color: #fff; font-weight: 800; letter-spacing: 0.04em;
  border-radius: var(--radius-pill);
  padding: 16px 38px; font-size: 18px;
  box-shadow: 0 8px 20px rgba(227, 84, 74, 0.32), inset 0 -3px 0 rgba(0,0,0,0.08);
  transition: transform .18s ease, box-shadow .18s ease;
}
.btn-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(227, 84, 74, 0.4), inset 0 -3px 0 rgba(0,0,0,0.08); }
.btn-cta .arrow { transition: transform .18s ease; }
.btn-cta:hover .arrow { transform: translateX(4px); }

.btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  white-space: nowrap;
  background: #fff; color: var(--teal-dark); font-weight: 800;
  border: 2px solid var(--teal); border-radius: var(--radius-pill);
  padding: 14px 32px; font-size: 17px;
  box-shadow: 0 6px 16px rgba(31, 168, 155, 0.14);
  transition: transform .18s ease, background .18s ease;
}
.btn-ghost:hover { transform: translateY(-2px); background: var(--teal-tint); }

.sec-title {
  text-align: center; font-size: 32px; font-weight: 800; color: var(--teal-dark);
  letter-spacing: 0.02em; line-height: 1.4; margin-bottom: 14px;
  text-wrap: pretty;
}
.sec-title .accent { color: var(--coral); font-size: 1.25em; }

.check-item { display: flex; align-items: flex-start; gap: 9px; font-size: 15px; }
.check-item .ck {
  flex: none; width: 20px; height: 20px; margin-top: 4px;
  border-radius: 50%; background: var(--teal);
  display: grid; place-items: center;
}
.check-item .ck::after {
  content: ""; width: 9px; height: 5px; margin-top: -2px;
  border-left: 2.5px solid #fff; border-bottom: 2.5px solid #fff;
  transform: rotate(-45deg);
}

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.94); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  height: 68px; display: flex; align-items: center; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 21px; color: var(--teal); letter-spacing: 0.01em; }
.brand .logo-mark { width: 34px; height: 34px; flex: none; }
.main-nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.main-nav a {
  font-size: 14.5px; font-weight: 700; color: var(--ink-soft);
  padding: 8px 12px; border-radius: 10px; transition: color .15s, background .15s;
}
.main-nav a:hover { color: var(--teal-dark); background: var(--teal-tint); }
.header-cta {
  display: inline-flex; align-items: center;
  background: linear-gradient(180deg, var(--coral), var(--coral-dark));
  color: #fff; font-weight: 800; font-size: 14px;
  padding: 10px 22px; border-radius: var(--radius-pill);
  box-shadow: 0 5px 12px rgba(227, 84, 74, 0.3);
  transition: transform .15s;
  white-space: nowrap;
}
.header-cta:hover { transform: translateY(-1px); }

.hamburger { display: none; margin-left: auto; width: 44px; height: 44px; border-radius: 12px; position: relative; z-index: 220; }
.hamburger span {
  display: block; width: 22px; height: 2.5px; background: var(--teal-dark);
  border-radius: 2px; margin: 5px auto; transition: transform .25s, opacity .2s;
}
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

.mobile-menu {
  display: none; position: fixed; inset: 0; z-index: 210;
  background: rgba(255,255,255,0.98);
  padding: 96px 32px 32px;
  flex-direction: column; gap: 6px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 18px; font-weight: 800; color: var(--ink);
  padding: 14px 8px; border-bottom: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
}
.mobile-menu a::after { content: "→"; color: var(--teal); font-size: 16px; }
.mobile-menu .menu-cta { margin-top: 24px; }
.mobile-menu .menu-cta::after { content: none; }

.site-footer { background: var(--teal-deep); color: #D7EFEB; padding: 40px 0 32px; }
.site-footer .inner { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; display: flex; flex-wrap: wrap; gap: 18px; align-items: center; justify-content: space-between; }
.site-footer .brand { color: #fff; font-size: 18px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 13.5px; font-weight: 700; }
.site-footer nav a:hover { color: #fff; }
.site-footer .copyright { width: 100%; font-size: 12px; color: #9DCDC6; text-align: center; margin-top: 10px; }

@media (max-width: 960px) {
  .main-nav, .site-header .header-cta { display: none; }
  .hamburger { display: block; }
}
@media (max-width: 640px) {
  body { font-size: 15px; }
  .sec-title { font-size: 24px; }
  .btn-cta { padding: 15px 30px; font-size: 16px; }
}