/* Okawai blog — listing + article styles. Reuses the k- design tokens from the homepage. */
.k-blog, .k-post {
  --k-primary: #0B1F3A;
  --k-accent: #00D4AA;
  --k-accent-hover: #00B894;
  --k-text-muted: #64748b;
  --k-bg-soft: #f8fafc;
  --k-border: #e5e9f0;
  --k-radius-lg: 20px;
  --k-radius-md: 14px;
  --k-shadow-lg: 0 20px 25px -5px rgba(11,31,58,0.08), 0 8px 10px -6px rgba(11,31,58,0.06);
  --k-shadow-sm: 0 1px 3px rgba(11,31,58,0.08);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  color: var(--k-primary);
}
.k-blog *, .k-post *, .k-blog *::before, .k-post *::before, .k-blog *::after, .k-post *::after {
  box-sizing: border-box;
}
.k-blog-container, .k-post-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Listing hero ---------- */
.k-blog-hero {
  padding: 80px 24px 48px;
  background: linear-gradient(180deg, var(--k-bg-soft) 0%, #fff 100%);
  text-align: center;
}
.k-blog-hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.k-blog-hero p {
  font-size: 18px;
  color: var(--k-text-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ---------- Filter chips ---------- */
.k-blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  padding: 0 24px 48px;
  max-width: 1120px;
  margin: 0 auto;
}
.k-chip {
  border: 1px solid var(--k-border);
  background: #fff;
  color: var(--k-primary);
  font-size: 14px;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}
.k-chip:hover {
  border-color: var(--k-accent);
  color: var(--k-accent-hover);
}
.k-chip.is-active {
  background: var(--k-primary);
  border-color: var(--k-primary);
  color: #fff;
}

/* ---------- Card grid ---------- */
.k-blog-grid {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px 100px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
@media (max-width: 900px) {
  .k-blog-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .k-blog-grid { grid-template-columns: 1fr; }
}
.k-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--k-border);
  border-radius: var(--k-radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.k-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--k-shadow-lg);
}
.k-card[hidden] { display: none; }
.k-card-image {
  aspect-ratio: 16/10;
  background: var(--k-bg-soft);
  overflow: hidden;
}
.k-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.k-card-body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.k-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.k-post-badge, .k-card-badge {
  display: inline-block;
  background: rgba(0,212,170,0.12);
  color: var(--k-accent-hover);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 6px;
}
.k-card-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  margin: 0;
  color: var(--k-primary);
}
.k-card-excerpt {
  font-size: 14px;
  color: var(--k-text-muted);
  line-height: 1.6;
  margin: 0;
  flex: 1;
}
.k-card-meta {
  font-size: 13px;
  color: var(--k-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}
.k-blog-empty {
  text-align: center;
  color: var(--k-text-muted);
  padding: 60px 24px;
  display: none;
}
.k-blog-empty.is-visible { display: block; }

/* ---------- Article page ---------- */
.k-post-header {
  padding: 48px 0 32px;
  background: var(--k-bg-soft);
}
.k-post-back {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--k-text-muted);
  text-decoration: none;
  margin-bottom: 20px;
}
.k-post-back:hover { color: var(--k-primary); }
.k-post-badges {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.k-post h1 {
  font-size: clamp(28px, 4.5vw, 42px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  max-width: 820px;
}
.k-post-meta {
  font-size: 14px;
  color: var(--k-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.k-post-meta-dot { opacity: 0.5; }
.k-post-cover {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  margin-top: -8px;
}
.k-post-cover img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: var(--k-radius-lg);
  display: block;
  margin-top: 32px;
}
.k-post-body {
  max-width: 720px;
  margin: 48px auto 0;
  font-size: 17px;
  line-height: 1.8;
}
.k-post-body p { margin: 0 0 22px; }
.k-post-body h2 {
  font-size: 26px;
  font-weight: 800;
  margin: 48px 0 18px;
  letter-spacing: -0.01em;
}
.k-post-body h3 {
  font-size: 21px;
  font-weight: 700;
  margin: 36px 0 14px;
}
.k-post-body ul, .k-post-body ol {
  margin: 0 0 22px;
  padding-left: 24px;
}
.k-post-body li { margin-bottom: 8px; }
.k-post-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--k-radius-md);
  margin: 12px 0;
}
.k-post-body figure { margin: 32px 0; }
.k-post-body figcaption {
  font-size: 13px;
  color: var(--k-text-muted);
  text-align: center;
  margin-top: 8px;
}
.k-post-body a { color: var(--k-accent-hover); text-decoration: underline; }
.k-post-body blockquote {
  border-left: 3px solid var(--k-accent);
  padding-left: 20px;
  margin: 28px 0;
  font-style: italic;
  color: var(--k-text-muted);
}
.k-post-body strong { color: var(--k-primary); }

.k-post-cta {
  max-width: 720px;
  margin: 60px auto 100px;
  background: var(--k-primary);
  border-radius: var(--k-radius-lg);
  padding: 40px;
  text-align: center;
}
.k-post-cta h3 {
  color: #fff;
  font-size: 24px;
  font-weight: 800;
  margin: 0 0 10px;
}
.k-post-cta p {
  color: rgba(255,255,255,0.75);
  margin: 0 0 24px;
  line-height: 1.6;
}

/* shared button (mirrors homepage .k-btn) */
.k-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.k-btn-primary {
  background: var(--k-accent);
  color: #06251f;
}
.k-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -6px rgba(0,212,170,0.45);
}