:root{
  --bg:#ffffff; --bg-elev:#f7f9fc; --text:#1f2a37; --muted:#6b7280;
  --accent:#2457a4; --cta:#0ea5e9; --link:#2563eb; --card:#ffffff; --border:#e5e7eb;
}
*{box-sizing:border-box} html,body{margin:0;padding:0}
body{background:var(--bg); color:var(--text); font:16px/1.6 Inter, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, sans-serif}

.wrap{max-width:1100px;margin:0 auto;padding:0 16px}

.site-header{position:sticky;top:0;background:var(--bg);border-bottom:1px solid var(--border);z-index:50}
.site-header .wrap{display:flex;align-items:center;gap:16px;min-height:64px}
.brand{display:flex;align-items:center;gap:12px}
.site-title{font-weight:800;letter-spacing:0.2px;text-decoration:none;color:var(--text);font-size:20px}
.site-title .accent{color:var(--accent)}
.primary-nav{margin-left:auto}
.primary-nav .menu{display:flex;gap:16px;list-style:none;margin:0;padding:0}
.primary-nav a{color:var(--text);text-decoration:none;padding:8px 10px;border-radius:10px}
.primary-nav a:hover{background:var(--bg-elev)}

.menu-toggle{display:none;margin-left:auto;background:transparent;border:1px solid var(--border);color:var(--text);padding:6px 10px;border-radius:10px}

.site-main .wrap{padding:24px 16px}

/* KB HERO */
.kb-hero{background:var(--accent);color:#fff;padding:48px 0;margin:0 0 16px 0}
.kb-hero-inner{max-width:900px;margin:0 auto;text-align:center;padding:0 16px}
.kb-hero h1{margin:0 0 16px 0;font-size:36px;font-weight:800}
.kb-hero .search-form{display:flex;max-width:720px;margin:0 auto;gap:8px}
.kb-hero .search-field{flex:1;background:#fff;border:0;color:#111827;padding:14px 16px;border-radius:999px;box-shadow:0 1px 2px rgba(0,0,0,.08)}
.kb-hero .search-submit{background:#111827;color:#fff;border:none;padding:14px 20px;border-radius:999px;font-weight:700}

/* TOPICS GRID */
.kb-section-title{font-size:18px;margin:12px 0 12px 0}
.topics-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(420px,1fr));gap:16px}
.topic-card{display:flex;align-items:flex-start;gap:16px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px;text-decoration:none;color:var(--text);box-shadow:0 1px 0 rgba(0,0,0,.04)}
.topic-card:hover{border-color:#d1d5db;box-shadow:0 2px 0 rgba(0,0,0,.08)}
.topic-icon{width:44px;height:44px;border:1px solid var(--border);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--accent);background:var(--bg-elev);flex-shrink:0}
.topic-title{font-weight:700;margin-bottom:4px}
.topic-desc{color:var(--muted);font-size:14px}
.topic-count{margin-left:auto;color:var(--muted);font-size:13px}

/* Posts grid below (blog area) */
.posts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:10px;box-shadow:0 1px 0 rgba(0,0,0,.04)}
.card-title{font-size:18px;margin:0 0 4px 0}
.card-title a{color:var(--text);text-decoration:none}
.card-meta{color:var(--muted);font-size:13px}
.card-excerpt{color:var(--text)}
.card-cta{margin-top:auto;align-self:flex-start;color:#fff;background:var(--accent);text-decoration:none;padding:8px 10px;border-radius:10px;font-weight:600}
.card-cta:hover{filter:brightness(1.05)}

/* Single */
.single .single-head{margin-bottom:16px;border-bottom:1px solid var(--border);padding-bottom:8px}
.single-title{font-size:32px;letter-spacing:.2px;margin:0 0 6px}
.single-meta{color:var(--muted);font-size:14px}
.single-content{font-size:17px;line-height:1.75}
.single-content h2, .single-content h3, .single-content h4{margin-top:1.6em}
.single-content a{color:var(--link)}
.single-foot{margin-top:24px;border-top:1px solid var(--border);padding-top:12px}

.tbk-badges{margin-top:8px}
.tbk-badge{display:inline-block;padding:4px 8px;border:1px solid var(--border);border-radius:999px;background:var(--bg-elev);color:var(--accent);font-weight:700;font-size:12px;letter-spacing:.2px}

/* Archive (category list) */
.kb-archive-head{margin-top:8px;margin-bottom:8px}
.kb-archive-title{font-size:28px;margin:0 0 4px}
.kb-archive-desc{color:var(--muted)}
.kb-articles{list-style:none;margin:0;padding:0;border:1px solid var(--border);border-radius:14px;overflow:hidden;background:var(--card)}
.kb-article{padding:14px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;gap:12px}
.kb-article:last-child{border-bottom:0}
.kb-article-link{text-decoration:none;color:var(--text);font-weight:600}
.kb-article-link:hover{color:var(--accent)}
.kb-date{color:var(--muted);font-size:13px}

/* Search form generic */
.search-form{display:flex;gap:8px}
.search-field{flex:1;background:var(--bg-elev);border:1px solid var(--border);color:var(--text);padding:10px 12px;border-radius:10px}
.search-submit{background:var(--accent);color:#fff;border:none;padding:10px 12px;border-radius:10px;font-weight:700}

.site-footer{border-top:1px solid var(--border);background:var(--bg-elev);padding:16px 0;margin-top:24px}

@media (max-width:760px){
  .primary-nav{display:none}
  .menu-toggle{display:block}
  .topics-grid{grid-template-columns:1fr}
}


/* Load more */
.kb-load{display:flex;justify-content:center;align-items:center;gap:10px;margin:16px 0}
.load-more{background:var(--accent);color:#fff;border:none;padding:10px 16px;border-radius:10px;font-weight:700;cursor:pointer}
.load-more:disabled{opacity:.6;cursor:not-allowed}
.spinner{color:var(--muted)}


/* Excerpt under titles in category list */
.kb-excerpt{color:var(--muted);font-size:14px;margin-top:2px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.kb-sentinel{height:48px;display:block}
.kb-sentinel.loading{background:linear-gradient(90deg, rgba(0,0,0,0) 0%, rgba(37,99,235,0.08) 50%, rgba(0,0,0,0) 100%);background-size:200% 100%;animation:tbkShine 1.2s linear infinite}
@keyframes tbkShine{0%{background-position:200% 0}100%{background-position:-200% 0}}