:root {
  --bg: #0a1512;
  --bg-alt: #0f1d19;
  --surface: #132420;
  --text: #eef5f1;
  --text-dim: #a6c2b7;
  --primary: #1fae72;
  --primary-2: #c9a24a;
  --accent: #c9a24a;
  --border: #1e3630;
  --radius: 10px;
  --font-head: 'Playfair Display', 'Noto Serif JP', serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', Meiryo, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
h1, h2, h3 { font-family: var(--font-head); font-weight: 700; letter-spacing: .01em; }
a { color: var(--primary-2); }

/* язык */
body[data-lang="ja"] .t-en { display: none; }
body[data-lang="en"] .t-ja { display: none; }
body[data-lang="en"] { font-family: 'Noto Sans JP', system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,10,12,.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 20px; padding: 14px 24px; }
.brand { font-family: var(--font-head); font-size: 1.3rem; color: var(--text); text-decoration: none; letter-spacing: .04em; margin-right: auto; }
.main-nav ul { list-style: none; display: flex; gap: 18px; margin: 0; padding: 0; }
.main-nav a { color: var(--text-dim); text-decoration: none; font-size: .92rem; }
.main-nav a:hover { color: var(--primary-2); }
.lang-toggle {
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  border-radius: 999px; padding: 6px 14px; cursor: pointer; font-size: .85rem;
}
.lang-toggle .lang-cur { color: var(--primary-2); font-weight: 700; }
.burger { display: none; flex-direction: column; gap: 4px; background: none; border: none; cursor: pointer; padding: 6px; }
.burger span { width: 22px; height: 2px; background: var(--text); display: block; }

/* hero */
.hero { padding: 90px 0 70px; background: radial-gradient(60% 60% at 50% 0%, var(--bg-alt), var(--bg)); }
.hero-inner { text-align: center; }
.tagline { color: var(--primary-2); letter-spacing: .08em; font-size: .85rem; text-transform: uppercase; margin: 0 0 14px; }
.hero h1 { font-size: clamp(1.9rem, 4.2vw, 3.1rem); margin: 0 0 20px; }
.hero-sub { color: var(--text-dim); max-width: 640px; margin: 0 auto 30px; font-size: 1.02rem; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 24px; }
.btn { display: inline-block; padding: 13px 26px; border-radius: var(--radius); text-decoration: none; font-weight: 700; font-size: .95rem; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #0a0a0a; }
.btn-ghost { border: 1px solid var(--border); color: var(--text); }
.hero-badge { font-size: .78rem; color: var(--text-dim); max-width: 520px; margin: 0 auto; }

/* author card */
.author-section { padding: 56px 0; text-align: center; }
.author-section .eyebrow, .author-section h2 { text-align: center; }
.author-card {
  max-width: 420px; margin: 26px auto 0; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 26px;
}
.author-photo {
  width: 96px; height: 96px; border-radius: 50%; object-fit: cover;
  margin: 0 auto 16px; display: block; border: 2px solid var(--border);
}
.author-name { font-family: var(--font-head); font-weight: 700; font-size: 1.1rem; margin: 0 0 10px; }
.author-bio { color: var(--text-dim); font-size: .92rem; margin: 0 0 16px; }
.author-link { font-weight: 700; font-size: .9rem; text-decoration: none; color: var(--primary-2); }
.author-link:hover { text-decoration: underline; }

/* sections */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.eyebrow { color: var(--primary-2); text-transform: uppercase; letter-spacing: .1em; font-size: .78rem; margin: 0 0 8px; }
.section h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); margin: 0 0 18px; }
.lead { color: var(--text-dim); max-width: 760px; font-size: 1rem; }
.check-list { list-style: none; padding: 0; margin: 22px 0; display: grid; gap: 12px; }
.two-col-list { grid-template-columns: 1fr 1fr; }
.check-list li { position: relative; padding-left: 22px; color: var(--text); font-size: .95rem; }
.check-list li::before { content: "\2713"; position: absolute; left: 0; color: var(--primary-2); font-weight: 700; }
.num-list { padding-left: 20px; color: var(--text); }
.num-list li { margin-bottom: 10px; }

.callout { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; margin-top: 18px; }
.callout h3 { margin: 0 0 8px; font-size: 1.05rem; }
.callout p { margin: 0; color: var(--text-dim); font-size: .92rem; }
.callout-alt { border-color: var(--primary); }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 26px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 10px; font-size: 1.05rem; color: var(--primary-2); }
.card p { margin: 0; color: var(--text-dim); font-size: .92rem; }

.two-col { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: start; }
.side-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.side-box h3 { margin-top: 0; font-size: 1rem; }

.note { color: var(--text-dim); font-size: .82rem; margin-top: 18px; }
.caution { color: var(--accent); font-size: .9rem; margin-top: 18px; font-weight: 600; }

.table-wrap { overflow-x: auto; margin-top: 26px; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
th, td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--border); font-size: .9rem; }
th { background: var(--surface); color: var(--primary-2); font-family: var(--font-head); font-weight: 700; }
td.mname { font-weight: 700; }
td.stars { color: var(--accent); letter-spacing: 1px; white-space: nowrap; }
tr:last-child td { border-bottom: none; }

.term-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 26px; }
.term { border-left: 3px solid var(--primary); padding-left: 16px; }
.term h3 { margin: 0 0 6px; font-size: 1rem; }
.term p { margin: 0; color: var(--text-dim); font-size: .9rem; }

.faq-list { margin-top: 26px; display: grid; gap: 12px; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; }
.faq-item summary { cursor: pointer; font-weight: 700; font-family: var(--font-head); font-size: 1rem; }
.faq-item p { color: var(--text-dim); margin: 12px 0 0; font-size: .92rem; }

.site-footer { background: var(--surface); border-top: 1px solid var(--border); padding: 44px 0; }
.foot-brand { font-family: var(--font-head); font-size: 1.1rem; margin: 0 0 12px; }
.foot-disclaimer { color: var(--text-dim); font-size: .78rem; max-width: 820px; margin: 0 0 16px; }
.foot-copy { color: var(--text-dim); font-size: .78rem; margin: 0; }

@media (max-width: 860px) {
  .card-grid { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .term-grid { grid-template-columns: 1fr; }
  .two-col-list { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .main-nav { display: none; }
  .burger { display: flex; }
  .card-grid { grid-template-columns: 1fr; }
  .header-inner { padding: 12px 18px; }
  .hero { padding: 64px 0 48px; }
}