/* page.css — 静的コンテンツページ共通スタイル */

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

/* ── TOKENS ── */
:root {
  --sans: 'Space Grotesk', sans-serif;
  --mono: 'JetBrains Mono', monospace;
  --nav-h: 60px;
  --max-w: 860px;
  --pad: clamp(1.25rem, 4vw, 2rem);
  --r: 6px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] {
  --bg: #07080d;
  --bg2: #0c0f1a;
  --surface: #111422;
  --surface-h: #171c30;
  --border: rgba(255,255,255,0.055);
  --border-h: rgba(255,255,255,0.13);
  --text: #dde0f0;
  --text2: #737890;
  --text3: #383d5a;
  --accent: #00e49a;
  --accent-d: #00b87d;
  --accent-glow: rgba(0,228,154,0.18);
  --accent-bg: rgba(0,228,154,0.07);
  --shadow: 0 2px 8px rgba(0,0,0,0.5);
  color-scheme: dark;
}
[data-theme="light"] {
  --bg: #f2f4f9;
  --bg2: #e9ecf4;
  --surface: #ffffff;
  --surface-h: #f5f7fc;
  --border: rgba(0,0,0,0.065);
  --border-h: rgba(0,0,0,0.14);
  --text: #0c0e18;
  --text2: #525670;
  --text3: #b0b5cc;
  --accent: #009e70;
  --accent-d: #007a56;
  --accent-glow: rgba(0,158,112,0.14);
  --accent-bg: rgba(0,158,112,0.07);
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  color-scheme: light;
}

/* ── NAV ── */
#site-header nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--pad);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  background: rgba(7,8,13,0.75);
}
[data-theme="light"] #site-header nav { background: rgba(242,244,249,0.8); }

.nav-logo {
  font-family: var(--sans); font-size: 1rem; font-weight: 700;
  color: var(--text); text-decoration: none; letter-spacing: -0.03em;
  display: flex; align-items: center;
  flex: 0 0 auto;
}
.nav-logo .dot { color: var(--accent); }
.nav-logo .labs { font-family: var(--mono); font-weight: 400; font-size: 0.78rem; color: var(--text2); margin-left: 1px; }

.nav-center {
  display: flex; gap: 2rem; list-style: none;
  position: absolute; left: 50%; transform: translateX(-50%);
  padding-left: 0; margin-bottom: 0;
}
.nav-center a {
  font-size: 0.82rem; font-weight: 500; color: var(--text2);
  text-decoration: none; transition: color 0.15s; letter-spacing: -0.01em;
}
.nav-center a:hover { color: var(--text); text-decoration: none; }
.nav-center a.active { color: var(--accent); }

.nav-right { display: flex; align-items: center; justify-content: flex-end; gap: 0.5rem; min-width: 0; }

.nav-page-link {
  height: 32px; padding: 0 0.75rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); text-decoration: none;
  display: none; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 0.72rem; color: var(--text2);
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.nav-page-link:hover {
  border-color: var(--border-h); color: var(--text); text-decoration: none;
}

.toggle-btn {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); cursor: pointer; color: var(--text2);
  font-size: 0.8rem; transition: border-color 0.15s, color 0.15s;
}
.toggle-btn:hover { border-color: var(--border-h); color: var(--text); }

.lang-btn {
  height: 32px; padding: 0 0.75rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); cursor: pointer;
  display: flex; align-items: center; gap: 0.35rem;
  font-family: var(--mono); font-size: 0.72rem; color: var(--text2);
  transition: border-color 0.15s, color 0.15s;
}
.lang-btn:hover { border-color: var(--border-h); color: var(--text); }

.follow-btn-nav {
  height: 32px; padding: 0 1rem;
  background: var(--accent-bg); border: 1px solid var(--accent-glow);
  border-radius: var(--r); cursor: pointer; text-decoration: none;
  display: flex; align-items: center; gap: 0.4rem;
  font-family: var(--sans); font-size: 0.78rem; font-weight: 500;
  color: var(--accent);
  transition: background 0.15s, border-color 0.15s;
}
.follow-btn-nav:hover { background: var(--accent-glow); text-decoration: none; }
.follow-label { white-space: nowrap; }

/* ── LAYOUT ── */
.page-wrap {
  max-width: var(--max-w); margin: 0 auto;
  padding: calc(var(--nav-h) + 3rem) var(--pad) 5rem;
}
.lang-content { display: none; }
body:not([data-lang]) .lang-ja,
body[data-lang="ja"] .lang-ja,
body[data-lang="en"] .lang-en { display: block; }

/* ── TYPOGRAPHY ── */
.page-label {
  font-family: var(--mono); font-size: 0.7rem; font-weight: 500;
  color: var(--accent); letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 0.75rem; display: flex; align-items: center; gap: 0.5rem;
}
.page-label::before { content: ''; width: 20px; height: 1px; background: var(--accent); }

.page-title {
  font-size: clamp(2rem, 5vw, 3rem); font-weight: 700;
  letter-spacing: -0.04em; line-height: 1.1; color: var(--text);
  margin-bottom: 0.75rem;
}
.page-subtitle {
  font-size: 1rem; color: var(--text2); line-height: 1.7;
  margin-bottom: 3rem; max-width: 600px;
}

h2.section-heading {
  font-size: 1.2rem; font-weight: 600; color: var(--text);
  letter-spacing: -0.02em; margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem; border-bottom: 1px solid var(--border);
}
h3.sub-heading {
  font-size: 0.95rem; font-weight: 600; color: var(--text);
  margin: 1.5rem 0 0.5rem;
}

p { font-size: 0.92rem; color: var(--text2); line-height: 1.8; margin-bottom: 0.75rem; }
ul, ol { padding-left: 1.4rem; margin-bottom: 0.75rem; }
li { font-size: 0.92rem; color: var(--text2); line-height: 1.8; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── CODE BLOCKS ── */
pre {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 1rem 1.25rem;
  overflow-x: auto; margin: 0.75rem 0 1.25rem;
}
code {
  font-family: var(--mono); font-size: 0.82rem; color: var(--accent);
}
pre code { color: var(--text); font-size: 0.8rem; }

/* ── CALLOUT ── */
.callout {
  background: var(--surface); border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--r); padding: 1rem 1.25rem;
  margin: 1.25rem 0;
}
.callout.warn {
  border-left-color: #f5a623;
}
.callout p { margin: 0; }

/* ── TABLE ── */
.cmd-table { width: 100%; border-collapse: collapse; margin: 1rem 0 1.5rem; }
.cmd-table th {
  font-family: var(--mono); font-size: 0.68rem; color: var(--text3);
  text-transform: uppercase; letter-spacing: 0.1em;
  text-align: left; padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
}
.cmd-table td {
  font-size: 0.88rem; color: var(--text2);
  padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.cmd-table td code { font-size: 0.78rem; }
.cmd-table tr:last-child td { border-bottom: none; }

/* ── STEP LIST ── */
.steps { list-style: none; padding: 0; counter-reset: step; }
.steps li {
  counter-increment: step;
  display: flex; gap: 1rem; align-items: flex-start;
  margin-bottom: 1.25rem; padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}
.steps li:last-child { border-bottom: none; }
.steps li::before {
  content: counter(step);
  flex-shrink: 0;
  width: 28px; height: 28px;
  background: var(--accent-bg); border: 1px solid var(--accent-glow);
  border-radius: 50%;
  font-family: var(--mono); font-size: 0.75rem; font-weight: 600;
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
}
.steps li .step-body { flex: 1; }
.steps li .step-title { font-size: 0.9rem; font-weight: 600; color: var(--text); margin-bottom: 0.35rem; }
.steps li .step-body p { margin-bottom: 0.5rem; }

/* ── PLATFORM TABS ── */
.platform-tabs { display: flex; gap: 0.5rem; margin: 1.25rem 0 0; flex-wrap: wrap; }
.platform-tab {
  padding: 0.4rem 1rem; border-radius: var(--r);
  background: var(--surface); border: 1px solid var(--border);
  font-family: var(--mono); font-size: 0.75rem; color: var(--text2);
  cursor: pointer; transition: border-color 0.15s, color 0.15s;
}
.platform-tab.active, .platform-tab:hover {
  border-color: var(--accent); color: var(--accent); background: var(--accent-bg);
}
.platform-content { display: none; }
.platform-content.active { display: block; }

/* ── BUTTONS ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.65rem 1.4rem; border-radius: var(--r);
  background: var(--accent); color: #07080d;
  font-size: 0.88rem; font-weight: 600;
  text-decoration: none; transition: transform 0.15s, box-shadow 0.15s;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 20px var(--accent-glow); text-decoration: none; }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 1.75rem var(--pad);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
}
.footer-logo { font-family: var(--mono); font-size: 0.82rem; color: var(--text3); }
.footer-logo .dot { color: var(--accent); }
.footer-links {
  display: flex; gap: 1.5rem; flex-wrap: wrap;
}
.footer-links a {
  font-family: var(--mono); font-size: 0.68rem; color: var(--text3);
  text-decoration: none; transition: color 0.15s;
}
.footer-links a:hover { color: var(--text2); }

/* ── RESPONSIVE ── */
@media (max-width: 1100px) {
  .nav-center { display: none; }
  .nav-page-link { display: flex; }
}

@media (max-width: 640px) {
  .nav-page-link { padding: 0 0.55rem; }
  .lang-btn { padding: 0 0.55rem; }
  .follow-btn-nav {
    width: 32px; padding: 0;
    justify-content: center; flex: 0 0 32px;
  }
  .follow-label { display: none; }
  .page-wrap { padding-top: calc(var(--nav-h) + 2rem); }
}

@media (max-width: 390px) {
  #site-header nav { padding: 0 0.85rem; }
  .nav-right { gap: 0.35rem; }
  .nav-page-link { display: none; }
  .nav-logo { font-size: 0.95rem; }
}