/* Shared styles for blog post pages (blog/*.html).
   Tokens, nav and footer mirror index.html — keep them in sync. */
:root {
  --bg-light: #f5f5f7;
  --bg-white: #ffffff;
  --bg-dark:  #041e33;

  --ink:    #1d1d1f;
  --text-2: #6e6e73;

  --ink-dark:    #f5f5f7;
  --text-dark-2: #93a8ba;

  --navy:      #00233f;
  --navy-link: #003c66;

  --border-soft: #d2d2d7;
  --border-dark: #12304a;

  --font-display: 'Schibsted Grotesk', 'SF Pro Display', 'Inter Tight', Inter, 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-text:    'SF Pro Text', Inter, 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono:    'SF Mono', 'JetBrains Mono', ui-monospace, Menlo, Monaco, monospace;

  --r-lg:   12px;
  --r-pill: 980px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg-white);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.374px;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── LANGUAGE BLOCKS ── */
html[lang="ja"] .lang-en,
html:not([lang="ja"]) .lang-ja { display: none !important; }

/* ── NAV ── */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 32px;
  height: 52px;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  z-index: 100;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.3px;
  color: var(--ink);
  text-decoration: none;
}

.nav-right { display: flex; align-items: center; gap: 22px; }

.nav-cta {
  background: var(--navy);
  color: #fff;
  padding: 7px 16px;
  border-radius: var(--r-pill);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.15s;
}

.nav-cta:hover { opacity: 0.85; }

.lang-toggle {
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-pill);
  padding: 2px;
}

.lang-toggle button {
  border: none;
  background: transparent;
  font-family: var(--font-text);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  color: var(--text-2);
  padding: 6px 11px;
  border-radius: var(--r-pill);
  cursor: pointer;
  white-space: nowrap;
}

.lang-toggle button.active {
  background: var(--bg-white);
  color: var(--ink);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

/* ── ARTICLE ── */
.post {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 72px 24px 100px;
}

.post-back {
  display: inline-block;
  font-size: 14px;
  color: var(--text-2);
  text-decoration: none;
  margin-bottom: 40px;
  transition: color 0.15s;
}

.post-back:hover { color: var(--ink); }

.post-eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 16px;
}

.post h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 44px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.post-date {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-2);
  padding-bottom: 32px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-soft);
}

.post-body h2 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 40px 0 12px;
}

.post-body p { line-height: 1.75; margin-bottom: 20px; }
.post-body ul { padding-left: 1.3em; margin-bottom: 20px; line-height: 1.75; }
.post-body a { color: var(--navy-link); }
.post-body .video {
  position: relative;
  aspect-ratio: 16 / 9;
  margin: 12px 0 10px;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: #000;
}
.post-body .video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.post-body .video-caption { font-size: 14px; color: var(--text-2); margin-bottom: 28px; }
.post-figure { margin: 12px 0 32px; }
.post-figure img { display: block; width: 100%; height: auto; border-radius: var(--r-lg); margin: 0; }
.post-figure figcaption { font-size: 14px; color: var(--text-2); margin-top: 10px; }
.post-figure--framed img { border: 1px solid var(--border-soft); }
.post-body img { max-width: 100%; height: auto; border-radius: var(--r-lg); margin: 12px 0 24px; }

html[lang="ja"] body { letter-spacing: 0; }
html[lang="ja"] .post h1 { font-size: clamp(26px, 4vw, 34px); line-height: 1.4; letter-spacing: 0.01em; word-break: auto-phrase; }
html[lang="ja"] .post-eyebrow { letter-spacing: 0.1em; }
html[lang="ja"] .post-body p,
html[lang="ja"] .post-body ul { line-height: 1.95; }

/* ── FOOTER ── */
footer {
  padding: 36px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  background: var(--bg-dark);
  border-top: 1px solid var(--border-dark);
}

footer img { height: 28px; width: auto; display: block; }

.footer-copy { font-size: 13px; color: var(--text-dark-2); }

@media (max-width: 768px) {
  nav { padding: 0 16px; }
  .nav-cta { display: none; }
  .post { padding: 48px 20px 72px; }
  footer { padding: 24px 20px; flex-direction: column; text-align: center; }
}