/* できたねこ サイト共通スタイル */

:root {
  --ivory: #fdfbf7;
  --surface: #ffffff;
  --orange: #ff9f43;
  --orange-dark: #e8862a;
  --forward: #67caaf;
  --turn-right: #c998dd;
  --turn-left: #4498dd;
  --repeat: #e64c71;
  --brown: #7e5d45;
  --brown-soft: rgba(126, 93, 69, 0.7);
  --fish-gold: #fabf5a;
  --rock-gray: #8e8274;
  --border: rgba(126, 93, 69, 0.14);
  --shadow: rgba(126, 93, 69, 0.16);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1080px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ivory: #221a14;
    --surface: #2c2219;
    --orange: #ff9f43;
    --orange-dark: #ffb066;
    --forward: #6fd6bb;
    --turn-right: #d6acea;
    --turn-left: #6badea;
    --repeat: #ee7893;
    --brown: #f3e6d8;
    --brown-soft: rgba(243, 230, 216, 0.72);
    --fish-gold: #fbcc78;
    --rock-gray: #a89c8d;
    --border: rgba(243, 230, 216, 0.14);
    --shadow: rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", "Noto Sans JP", sans-serif;
  background: var(--ivory);
  color: var(--brown);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--orange-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- ヘッダー ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--ivory) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--brown);
}

.brand:hover {
  text-decoration: none;
}

.brand .brand-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.main-nav a {
  color: var(--brown);
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
}

.main-nav a:hover {
  color: var(--orange-dark);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span,
.nav-toggle::before,
.nav-toggle::after {
  content: "";
  display: block;
  width: 24px;
  height: 2px;
  margin: 6px auto;
  background: var(--brown);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }

  .main-nav.is-open {
    max-height: 320px;
  }

  .main-nav a {
    width: 100%;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
  }

  .nav-toggle.is-open span {
    opacity: 0;
  }

  .nav-toggle.is-open::before {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle.is-open::after {
    transform: translateY(-8px) rotate(-45deg);
  }
}

/* ---------- ヒーロー ---------- */

.hero {
  padding: 64px 0 40px;
}

.hero .wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 860px) {
  .hero .wrap {
    grid-template-columns: 1fr;
  }
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: color-mix(in srgb, var(--orange) 16%, var(--surface));
  color: var(--orange-dark);
  font-weight: 700;
  font-size: 0.82rem;
  padding: 8px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  line-height: 1.3;
  margin: 0 0 20px;
  font-weight: 800;
}

.hero h1 .accent {
  color: var(--orange-dark);
}

.hero p.lead {
  font-size: 1.1rem;
  color: var(--brown-soft);
  margin: 0 0 32px;
  max-width: 46ch;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.98rem;
  padding: 14px 28px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--orange);
  color: #ffffff;
  box-shadow: 0 10px 24px -8px var(--shadow);
}

.btn-primary:hover {
  background: var(--orange-dark);
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--brown);
  border: 1.5px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--orange);
  color: var(--orange-dark);
  text-decoration: none;
}

/* ---------- ボードプレビュー（ヒーロー右側の演出） ---------- */

.board-preview {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: 0 24px 48px -20px var(--shadow);
  border: 1px solid var(--border);
}

.board-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: repeat(5, 1fr);
  gap: 4px;
  aspect-ratio: 1;
  background: color-mix(in srgb, var(--brown) 8%, transparent);
  border-radius: var(--radius-md);
  padding: 8px;
}

.board-cell {
  background: var(--ivory);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.board-cell svg {
  width: 60%;
  height: 60%;
}

.board-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 16px;
  font-size: 0.82rem;
  color: var(--brown-soft);
}

.board-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.board-legend .swatch {
  width: 10px;
  height: 10px;
  border-radius: 3px;
}

/* ---------- セクション共通 ---------- */

section {
  padding: 56px 0;
}

.section-head {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 44px;
}

.section-head .eyebrow {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--orange-dark);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin: 0 0 12px;
}

.section-head p {
  color: var(--brown-soft);
  margin: 0;
}

/* ---------- 特長カード ---------- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.feature-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-icon svg {
  width: 26px;
  height: 26px;
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--brown-soft);
}

/* ---------- あそびかたステップ ---------- */

.steps {
  counter-reset: step;
  display: grid;
  gap: 16px;
}

.step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.step-num {
  counter-increment: step;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--orange);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-num::before {
  content: counter(step);
}

.step h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.step p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--brown-soft);
}

/* ---------- ステージ構成 ---------- */

.stage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.stage-card {
  border-radius: var(--radius-md);
  padding: 26px 24px;
  color: #fff;
}

.stage-card h3 {
  margin: 0 0 6px;
  font-size: 1.1rem;
}

.stage-card .range {
  font-size: 0.85rem;
  opacity: 0.85;
  font-weight: 700;
  margin-bottom: 12px;
  display: block;
}

.stage-card p {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.95;
}

.stage-card.basic {
  background: linear-gradient(135deg, var(--forward), color-mix(in srgb, var(--forward) 70%, #1e5b4d));
}

.stage-card.applied {
  background: linear-gradient(135deg, var(--turn-left), color-mix(in srgb, var(--turn-left) 65%, #143a63));
}

.stage-card.advanced {
  background: linear-gradient(135deg, var(--repeat), color-mix(in srgb, var(--repeat) 65%, #6b1626));
}

/* ---------- 保護者向け安心セクション ---------- */

.trust {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.trust-item {
  text-align: center;
  padding: 20px 12px;
}

.trust-item .num {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.trust-item h3 {
  margin: 0 0 4px;
  font-size: 0.95rem;
}

.trust-item p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--brown-soft);
}

/* ---------- お問い合わせ / CTA ---------- */

.cta-section {
  text-align: center;
}

.cta-box {
  background: linear-gradient(135deg, var(--orange), var(--fish-gold));
  border-radius: var(--radius-lg);
  padding: 56px 32px;
  color: #fff;
}

.cta-box h2 {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.cta-box p {
  margin: 0 0 28px;
  opacity: 0.95;
}

.cta-box .btn-primary {
  background: #ffffff;
  color: var(--orange-dark);
}

.cta-box .btn-primary:hover {
  background: #fff7ec;
}

/* ---------- フッター ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  font-size: 0.85rem;
  color: var(--brown-soft);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links a {
  color: var(--brown-soft);
  font-weight: 600;
}

.footer-links a:hover {
  color: var(--orange-dark);
}

/* ---------- 法務ページ（プライバシーポリシー / 利用規約） ---------- */

.legal {
  padding: 48px 0 80px;
}

.legal .wrap {
  max-width: 760px;
}

.legal h1 {
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  margin-bottom: 4px;
}

.legal .updated {
  color: var(--brown-soft);
  font-size: 0.88rem;
  margin-bottom: 40px;
}

.legal h2 {
  font-size: 1.15rem;
  margin: 40px 0 14px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.legal h2:first-of-type {
  border-top: none;
  margin-top: 0;
}

.legal p,
.legal li {
  font-size: 0.96rem;
  color: var(--brown-soft);
}

.legal ul,
.legal ol {
  padding-left: 1.4em;
}

.legal strong {
  color: var(--brown);
}

.legal .contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-top: 12px;
}

.legal .contact-card dt {
  font-weight: 700;
  color: var(--brown);
}

.legal .contact-card dd {
  margin: 0 0 12px;
}

.legal .contact-card dd:last-child {
  margin-bottom: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  margin-bottom: 24px;
}