/* ────────────────────────────────────────────────────────────────────
 * Pachirin pachirin.techikoma.com 共通スタイル
 * index.html (LP) と privacy / eula / contact サブページで共有
 * ──────────────────────────────────────────────────────────────────── */

:root {
  --bg:           #0e0f12;
  --bg-alt:       #16181d;
  --bg-card:      #1a1d23;
  --bg-deep:      #08090c;
  --text:         #ececef;
  --text-dim:     #92959e;
  --text-faint:   #4a4d56;
  --border:       #24262d;
  --border-soft:  #1c1e25;
  --accent-from:  #63C9D8;
  --accent-to:    #6E68C8;
  --accent-cyan:  #5BA9E0;
  --accent-amber: #e0a03a;

  --font-display: "Noto Sans JP", "Yu Gothic UI", "Hiragino Sans", system-ui, sans-serif;
  --font-numerals: "Zen Old Mincho", "Yu Mincho", serif;
  --font-body:    "Noto Sans JP", "Yu Gothic UI", "Hiragino Sans", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", "Cascadia Code", "Consolas", ui-monospace, monospace;

  --container: 1240px;
  --gutter: clamp(20px, 4vw, 56px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.75;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
  z-index: 0;
}

.brand-dot {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-from), var(--accent-to));
  vertical-align: middle;
  margin-right: 8px;
  box-shadow: 0 0 12px rgba(99,201,216,.5);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  position: relative;
  z-index: 1;
}

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14,15,18,.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.nav-inner {
  display: flex;
  align-items: center;
  height: 60px;
  gap: 24px;
}
.nav-logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
}
.nav-logo .ja {
  font-family: var(--font-display);
  margin-left: 10px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  font-weight: 500;
}
.nav-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 22px;
}
.nav-link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 180ms ease;
}
.nav-link:hover { color: var(--text); }
.nav-link.lang-switch {
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 3px;
  color: var(--text-dim);
}
.nav-link.lang-switch:hover {
  border-color: var(--accent-from);
  color: var(--accent-from);
}
.nav-cta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--bg);
  background: linear-gradient(120deg, var(--accent-from), var(--accent-to));
  text-decoration: none;
  padding: 9px 16px;
  border-radius: 3px;
  font-weight: 700;
  transition: transform 200ms ease, box-shadow 200ms ease;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px -8px rgba(99,201,216,.6);
}
@media (max-width: 760px) { .nav-links .nav-link { display: none; } }

/* ── Document layout for sub-pages ── */
.doc {
  padding: clamp(60px, 9vw, 100px) 0 80px;
  position: relative;
}
.doc-header {
  border-bottom: 1px solid var(--border-soft);
  padding-bottom: 36px;
  margin-bottom: 56px;
}
.doc-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--accent-from);
  margin-bottom: 18px;
}
.doc-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  margin: 0 0 16px;
  letter-spacing: -0.005em;
}
.doc-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.08em;
}

.doc-body {
  max-width: 760px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}
.doc-body p { margin: 0 0 20px; color: var(--text); }
.doc-body p.lede {
  font-size: 16.5px;
  color: var(--text-dim);
  border-left: 2px solid var(--accent-from);
  padding-left: 16px;
  margin-bottom: 32px;
}
.doc-body h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  margin: 56px 0 16px;
  padding-top: 32px;
  border-top: 1px solid var(--border-soft);
  letter-spacing: -0.005em;
}
.doc-body h2:first-of-type { padding-top: 0; border-top: 0; margin-top: 32px; }
.doc-body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  margin: 32px 0 10px;
  color: var(--text);
}
.doc-body ul, .doc-body ol {
  padding-left: 24px;
  margin: 0 0 20px;
}
.doc-body li {
  margin-bottom: 8px;
  line-height: 1.8;
}
.doc-body a {
  color: var(--accent-from);
  text-decoration: none;
  border-bottom: 1px dashed var(--accent-from);
}
.doc-body a:hover { color: var(--accent-to); border-color: var(--accent-to); }
.doc-body strong { color: var(--text); font-weight: 700; }
.doc-body code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: rgba(99,201,216,.08);
  color: var(--accent-from);
  padding: 1px 6px;
  border-radius: 2px;
}
.doc-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}
.doc-body table th, .doc-body table td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.doc-body table th {
  background: var(--bg-deep);
  color: var(--text-dim);
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.doc-body hr {
  border: 0;
  border-top: 1px solid var(--border-soft);
  margin: 40px 0;
}

.doc-tail {
  margin-top: 80px;
  padding-top: 28px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.08em;
  flex-wrap: wrap;
  gap: 12px;
}
.doc-tail a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px dashed var(--border);
}
.doc-tail a:hover { color: var(--accent-from); border-color: var(--accent-from); }

/* ── Footer ── */
footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 48px;
}
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand .display {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.16em;
  font-size: 17px;
  margin-bottom: 4px;
}
.footer-brand .ja {
  font-family: var(--font-display);
  color: var(--text-dim);
  font-size: 12px;
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 12px;
  color: var(--text-faint);
  max-width: 320px;
  line-height: 1.7;
}
.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.2em;
  margin: 0 0 16px;
  text-transform: uppercase;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  color: var(--text);
  text-decoration: none;
  font-size: 13.5px;
  transition: color 180ms ease;
}
.footer-col a:hover { color: var(--accent-from); }
.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.08em;
  flex-wrap: wrap;
  gap: 12px;
}

@media (prefers-reduced-motion: reduce) {
  body { scroll-behavior: auto; }
}