:root {
  --ink: #4a3f4f;
  --ink-soft: #85798a;
  --bg: #f7f0e8;
  --card: #fffbf6;
  --line: #eadfd4;
  --accent: #ff9d6c;
  --accent-deep: #f07f48;
  --blue: #7ab8ef;
  --font: 'M PLUS Rounded 1c', system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); line-height: 1.7; }
a { color: inherit; }
kbd { display: inline-block; font: inherit; font-size: 12px; font-weight: 700; background: #fff; border: 2px solid var(--line); border-bottom-width: 3px; border-radius: 7px; padding: 0 7px; }

/* ヘッダー */
.top { position: fixed; inset: 0 0 auto 0; z-index: 10; display: flex; justify-content: space-between; align-items: center; padding: 12px 20px; background: rgba(247, 240, 232, .75); backdrop-filter: blur(10px); }
.logo { font-weight: 800; font-size: 20px; text-decoration: none; color: var(--accent-deep); }
.logo span { color: var(--blue); margin-left: 3px; }
nav { display: flex; align-items: center; gap: 12px; }
.nav-link { font-size: 13px; font-weight: 700; color: var(--ink-soft); }
#nav-avatar { width: 32px; height: 32px; border-radius: 50%; }

/* ボタン */
.btn { display: inline-block; font-weight: 800; text-decoration: none; border-radius: 16px; transition: transform .1s, filter .1s; }
.btn:active { transform: translateY(2px); }
.btn.small { background: var(--accent); color: #fff; padding: 8px 16px; font-size: 14px; box-shadow: 0 3px 0 var(--accent-deep); }
.btn.primary { background: var(--accent); color: #fff; box-shadow: 0 5px 0 var(--accent-deep); }
.btn.primary:hover, .btn.small:hover { filter: brightness(1.05); }
.btn.big { font-size: 20px; padding: 16px 34px; }

/* ヒーロー */
.hero { position: relative; height: min(92vh, 780px); min-height: 520px; overflow: hidden; }
#hero3d { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(247, 240, 232, .92) 0%, rgba(247, 240, 232, .55) 42%, rgba(247, 240, 232, 0) 70%); pointer-events: none; }
.hero-copy { position: absolute; z-index: 2; left: max(24px, 7vw); top: 50%; transform: translateY(-45%); max-width: 660px; }
.eyebrow { display: inline-block; margin: 0 0 12px; background: #fff; color: var(--accent-deep); font-weight: 800; font-size: 13px; padding: 4px 12px; border-radius: 999px; }
.hero h1 { margin: 0 0 14px; font-size: clamp(28px, 4vw, 48px); line-height: 1.3; font-weight: 800; }
.hero h1 .nw { white-space: nowrap; }
.lead { margin: 0 0 26px; font-size: 16px; color: var(--ink); }
.cta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.cta-note { font-size: 13px; color: var(--ink-soft); font-weight: 700; }

/* セクション共通 */
section:not(.hero) { max-width: 1060px; margin: 0 auto; padding: 72px 20px 24px; }
section h2 { text-align: center; font-size: clamp(24px, 3vw, 32px); margin: 0 0 32px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.card { background: var(--card); border-radius: 22px; padding: 22px; box-shadow: 0 10px 30px rgba(120, 80, 60, .08); }
.card .icon { font-size: 34px; }
.card h3 { margin: 6px 0 6px; font-size: 18px; }
.card p { margin: 0; font-size: 14px; color: var(--ink-soft); }

.map-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.map { border-radius: 26px; padding: 28px; color: #fff; box-shadow: 0 14px 34px rgba(120, 80, 60, .12); }
.map.forest { background: linear-gradient(135deg, #7fb069, #4f82ab); }
.map.desert { background: linear-gradient(135deg, #e8b36a, #d0805a); }
.map-emoji { font-size: 42px; }
.map h3 { margin: 4px 0 8px; font-size: 22px; }
.map p { margin: 0; font-size: 15px; opacity: .95; }

.steps { list-style: none; padding: 0; margin: 0 auto; max-width: 720px; display: grid; gap: 14px; }
.steps li { display: flex; gap: 16px; align-items: center; background: var(--card); border-radius: 20px; padding: 16px 20px; }
.steps b { flex: none; width: 42px; height: 42px; border-radius: 50%; background: var(--blue); color: #fff; display: grid; place-items: center; font-size: 20px; }
.steps h3 { margin: 0; font-size: 17px; }
.steps p { margin: 0; font-size: 14px; color: var(--ink-soft); }
.keys { margin: 26px auto 0; max-width: 720px; display: flex; flex-wrap: wrap; gap: 10px 18px; justify-content: center; font-size: 14px; color: var(--ink-soft); }

.final { text-align: center; padding-bottom: 60px !important; }
.final .small { font-size: 13px; color: var(--ink-soft); margin-top: 18px; }
footer { text-align: center; font-size: 12px; color: var(--ink-soft); padding: 28px 0 36px; }

@media (max-width: 700px) {
  .hero::after { background: linear-gradient(180deg, rgba(247, 240, 232, .1) 0%, rgba(247, 240, 232, .9) 60%); }
  .hero-copy { top: auto; bottom: 28px; transform: none; right: 20px; left: 20px; }
  .nav-link { display: none; }
}