/* =========================================================
   BIHAR VIDYA SAATHI — MAIN STYLESHEET
   Mobile-first, lightweight, no external framework
   ========================================================= */

:root{
  --color-primary:#2563EB;
  --color-primary-dark:#1D4ED8;
  --color-accent:#F59E0B;
  --color-dark:#111827;
  --color-bg:#F8FAFC;
  --color-white:#FFFFFF;
  --color-text:#1F2937;
  --color-text-light:#6B7280;
  --color-border:#E5E7EB;

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans Devanagari", "Noto Sans", Arial, sans-serif;

  --radius-sm:6px;
  --radius-md:12px;
  --radius-lg:18px;

  --container-max:1180px;
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:40px;
  --space-5:64px;
}

/* ---------- RESET ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--font-base);
  color:var(--color-text);
  background:var(--color-bg);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; height:auto; display:block; }
a{ color:var(--color-primary); text-decoration:none; }
a:hover{ color:var(--color-primary-dark); }
ul,ol{ padding-left:1.25em; }
h1,h2,h3,h4,h5,h6{
  color:var(--color-dark);
  line-height:1.3;
  margin:0 0 var(--space-2);
  font-weight:700;
}
h1{ font-size:clamp(1.6rem,4vw,2.4rem); }
h2{ font-size:clamp(1.35rem,3vw,1.9rem); }
h3{ font-size:1.25rem; }
p{ margin:0 0 var(--space-2); }
table{ width:100%; border-collapse:collapse; overflow-x:auto; display:block; }
button, input, textarea, select{ font-family:inherit; font-size:1rem; }

/* Visible focus states for accessibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:3px solid var(--color-accent);
  outline-offset:2px;
}
.skip-link{
  position:absolute; left:-999px; top:0; background:var(--color-dark); color:#fff;
  padding:10px 16px; z-index:9999; border-radius:0 0 8px 0;
}
.skip-link:focus{ left:0; }

.container{
  width:100%;
  max-width:var(--container-max);
  margin:0 auto;
  padding:0 var(--space-2);
}

.section{ padding:var(--space-4) 0; }
.section-title{ margin-bottom:var(--space-3); }
.section-title .eyebrow{
  display:inline-block; color:var(--color-primary); font-weight:700;
  font-size:.85rem; letter-spacing:.04em; text-transform:uppercase; margin-bottom:6px;
}

.btn{
  display:inline-block; padding:12px 22px; border-radius:var(--radius-sm);
  font-weight:600; border:2px solid transparent; cursor:pointer; transition:background .15s ease, color .15s ease, transform .1s ease;
}
.btn:hover{ transform:translateY(-1px); }
.btn-primary{ background:var(--color-primary); color:#fff; }
.btn-primary:hover{ background:var(--color-primary-dark); color:#fff; }
.btn-outline{ background:transparent; border-color:var(--color-white); color:var(--color-white); }
.btn-outline:hover{ background:var(--color-white); color:var(--color-primary); }
.btn-accent{ background:var(--color-accent); color:var(--color-dark); }

/* ---------- HEADER ---------- */
.site-header{
  background:var(--color-white);
  border-bottom:1px solid var(--color-border);
  position:sticky; top:0; z-index:1000;
}
.site-header .header-inner{
  display:flex; align-items:center; justify-content:space-between;
  gap:var(--space-2); padding:12px 0;
}
.site-branding{ display:flex; align-items:center; gap:10px; }
.site-branding img.custom-logo{ max-height:48px; width:auto; }
.site-branding .brand-text .site-title{
  font-size:1.15rem; font-weight:800; color:var(--color-dark); margin:0; line-height:1.2;
}
.site-branding .brand-text .site-tagline{
  font-size:.75rem; color:var(--color-text-light); margin:0;
}

.primary-nav{ display:none; }
.primary-nav ul{ list-style:none; display:flex; gap:6px; margin:0; padding:0; }
.primary-nav a{
  display:block; padding:10px 12px; color:var(--color-dark); font-weight:600; font-size:.95rem; border-radius:var(--radius-sm);
}
.primary-nav a:hover, .primary-nav .current-menu-item > a{ background:var(--color-bg); color:var(--color-primary); }

.header-actions{ display:flex; align-items:center; gap:8px; }
.header-search-toggle, .menu-toggle{
  background:none; border:none; cursor:pointer; padding:8px; border-radius:var(--radius-sm); color:var(--color-dark);
}
.header-search-toggle:hover, .menu-toggle:hover{ background:var(--color-bg); }

.header-search-form{
  display:none; padding:12px 0; border-top:1px solid var(--color-border);
}
.header-search-form.is-open{ display:block; }
.header-search-form form{ display:flex; gap:8px; }
.header-search-form input[type="search"]{
  flex:1; padding:10px 12px; border:1px solid var(--color-border); border-radius:var(--radius-sm);
}

/* Mobile nav (slide-down) */
.mobile-nav{ display:none; background:var(--color-white); border-top:1px solid var(--color-border); }
.mobile-nav.is-open{ display:block; }
.mobile-nav ul{ list-style:none; margin:0; padding:8px 0; }
.mobile-nav a{ display:block; padding:12px var(--space-2); color:var(--color-dark); font-weight:600; border-bottom:1px solid var(--color-border); }

@media (min-width:960px){
  .primary-nav{ display:block; }
  .menu-toggle{ display:none; }
  .mobile-nav{ display:none !important; }
}

/* ---------- HERO ---------- */
.hero{
  background:linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color:#fff; padding:var(--space-5) 0;
}
.hero .hero-grid{ display:grid; gap:var(--space-3); align-items:center; }
.hero h1{ color:#fff; }
.hero p.hero-sub{ color:#DBEAFE; font-size:1.05rem; }
.hero .hero-actions{ display:flex; gap:12px; flex-wrap:wrap; margin-top:var(--space-2); }
.hero .hero-media img{ border-radius:var(--radius-lg); box-shadow:0 20px 40px rgba(0,0,0,.25); }
@media (min-width:860px){
  .hero .hero-grid{ grid-template-columns:1.1fr .9fr; }
}

/* ---------- FEATURE CARDS ---------- */
.cards-grid{
  display:grid; gap:var(--space-2);
  grid-template-columns:repeat(auto-fit, minmax(230px,1fr));
}
.feature-card{
  background:var(--color-white); border:1px solid var(--color-border);
  border-radius:var(--radius-md); padding:var(--space-3);
  transition:box-shadow .15s ease, transform .15s ease;
}
.feature-card:hover{ box-shadow:0 10px 24px rgba(17,24,39,.08); transform:translateY(-2px); }
.feature-card .icon{
  width:44px; height:44px; border-radius:10px; background:var(--color-bg);
  display:flex; align-items:center; justify-content:center; color:var(--color-primary); margin-bottom:12px;
}

/* ---------- ARTICLE / POST CARDS ---------- */
.post-card{
  background:var(--color-white); border:1px solid var(--color-border); border-radius:var(--radius-md);
  overflow:hidden; display:flex; flex-direction:column; height:100%;
}
.post-card .post-thumb{ aspect-ratio:16/9; overflow:hidden; background:var(--color-border); }
.post-card .post-thumb img{ width:100%; height:100%; object-fit:cover; }
.post-card .post-body{ padding:var(--space-2); display:flex; flex-direction:column; gap:8px; flex:1; }
.post-card .post-category{
  color:var(--color-primary); font-weight:700; font-size:.75rem; text-transform:uppercase; letter-spacing:.03em;
}
.post-card .post-title{ font-size:1.05rem; margin:0; }
.post-card .post-title a{ color:var(--color-dark); }
.post-card .post-excerpt{ color:var(--color-text-light); font-size:.92rem; margin:0; }
.post-card .post-meta{ font-size:.8rem; color:var(--color-text-light); margin-top:auto; }
.post-card .post-readmore{ font-weight:700; font-size:.9rem; }

.posts-grid{ display:grid; gap:var(--space-2); grid-template-columns:repeat(auto-fill, minmax(260px,1fr)); }

/* ---------- CATEGORY CHIPS ---------- */
.category-grid{ display:grid; gap:12px; grid-template-columns:repeat(auto-fill, minmax(160px,1fr)); }
.category-chip{
  display:block; background:var(--color-white); border:1px solid var(--color-border); border-radius:var(--radius-md);
  padding:16px; text-align:center; font-weight:700; color:var(--color-dark);
}
.category-chip:hover{ border-color:var(--color-primary); color:var(--color-primary); }

/* ---------- SINGLE ARTICLE ---------- */
.breadcrumbs{ font-size:.85rem; color:var(--color-text-light); margin-bottom:var(--space-2); }
.breadcrumbs a{ color:var(--color-text-light); }
.breadcrumbs a:hover{ color:var(--color-primary); }

.article-header .article-category{ color:var(--color-primary); font-weight:700; text-transform:uppercase; font-size:.8rem; }
.article-meta{
  display:flex; flex-wrap:wrap; gap:16px; color:var(--color-text-light); font-size:.88rem;
  border-top:1px solid var(--color-border); border-bottom:1px solid var(--color-border); padding:12px 0; margin:var(--space-2) 0;
}
.article-featured-image{ border-radius:var(--radius-md); overflow:hidden; margin-bottom:var(--space-2); }

.share-buttons{ display:flex; gap:8px; flex-wrap:wrap; margin:var(--space-2) 0; }
.share-buttons a{
  padding:8px 14px; border-radius:20px; background:var(--color-bg); border:1px solid var(--color-border); font-size:.85rem; font-weight:600; color:var(--color-dark);
}

.toc-box{
  background:var(--color-white); border:1px solid var(--color-border); border-left:4px solid var(--color-primary);
  border-radius:var(--radius-sm); padding:var(--space-2); margin:var(--space-2) 0;
}
.toc-box summary{ font-weight:700; cursor:pointer; }
.toc-box ul{ margin:10px 0 0; }

.article-content{ font-size:1.05rem; }
.article-content h2{ margin-top:var(--space-3); }
.article-content h3{ margin-top:var(--space-2); }
.article-content img{ border-radius:var(--radius-md); margin:var(--space-2) 0; }
.article-content blockquote{
  margin:var(--space-2) 0; padding:12px 18px; border-left:4px solid var(--color-accent); background:var(--color-bg); border-radius:0 var(--radius-sm) var(--radius-sm) 0;
}

.info-box{
  background:#EFF6FF; border:1px solid #BFDBFE; border-radius:var(--radius-md); padding:var(--space-2); margin:var(--space-3) 0;
}
.info-box h3{ margin-top:0; color:var(--color-primary-dark); }

.important-links{ background:var(--color-white); border:1px solid var(--color-border); border-radius:var(--radius-md); padding:var(--space-2); margin:var(--space-3) 0; }
.important-links .link-row{ display:flex; align-items:center; justify-content:space-between; padding:10px 0; border-bottom:1px solid var(--color-border); gap:12px; flex-wrap:wrap; }
.important-links .link-row:last-child{ border-bottom:none; }

.faq-item{ border-bottom:1px solid var(--color-border); padding:14px 0; }
.faq-item summary{ font-weight:700; cursor:pointer; list-style:none; display:flex; justify-content:space-between; align-items:center; }
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{ content:"+"; font-size:1.3rem; color:var(--color-primary); }
.faq-item[open] summary::after{ content:"–"; }
.faq-item p{ margin-top:10px; color:var(--color-text-light); }

.author-box{
  display:flex; gap:16px; align-items:flex-start; background:var(--color-white); border:1px solid var(--color-border);
  border-radius:var(--radius-md); padding:var(--space-2); margin:var(--space-3) 0;
}
.author-box img{ border-radius:50%; width:64px; height:64px; object-fit:cover; }

.disclaimer-box{
  background:#FFFBEB; border:1px solid #FDE68A; border-radius:var(--radius-md); padding:var(--space-2); font-size:.9rem; color:#92400E; margin:var(--space-3) 0;
}

/* ---------- AD SLOTS ---------- */
.ad-slot{
  text-align:center; margin:var(--space-3) auto; padding:var(--space-2); background:var(--color-white);
  border:1px dashed var(--color-border); border-radius:var(--radius-sm); color:var(--color-text-light); font-size:.85rem;
  min-height:60px; display:flex; align-items:center; justify-content:center;
}

/* ---------- SIDEBAR ---------- */
.content-layout{ display:grid; gap:var(--space-4); }
.widget{ background:var(--color-white); border:1px solid var(--color-border); border-radius:var(--radius-md); padding:var(--space-2); margin-bottom:var(--space-2); }
.widget h3{ margin-top:0; }
@media (min-width:960px){
  .content-layout{ grid-template-columns:2.2fr 1fr; }
}

/* ---------- FORMS ---------- */
.bvs-form label{ display:block; font-weight:600; margin-bottom:4px; font-size:.9rem; }
.bvs-form input, .bvs-form textarea, .bvs-form select{
  width:100%; padding:10px 12px; border:1px solid var(--color-border); border-radius:var(--radius-sm); margin-bottom:14px;
}
.bvs-form textarea{ min-height:130px; }

/* ---------- FOOTER ---------- */
.site-footer{ background:var(--color-dark); color:#D1D5DB; margin-top:var(--space-5); }
.footer-top{ padding:var(--space-4) 0; display:grid; gap:var(--space-3); grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); }
.site-footer h4{ color:#fff; font-size:1rem; margin-bottom:14px; }
.site-footer a{ color:#D1D5DB; }
.site-footer a:hover{ color:var(--color-accent); }
.site-footer ul{ list-style:none; padding:0; margin:0; }
.site-footer li{ margin-bottom:8px; }
.footer-bottom{ border-top:1px solid rgba(255,255,255,.1); padding:var(--space-2) 0; font-size:.85rem; text-align:center; }
.footer-disclaimer{ max-width:800px; margin:8px auto 0; text-align:center; color:#9CA3AF; font-size:.8rem; }
.footer-social{ display:flex; gap:10px; margin-top:10px; }
.footer-social a{ width:36px; height:36px; border-radius:50%; background:rgba(255,255,255,.08); display:flex; align-items:center; justify-content:center; }

/* ---------- 404 ---------- */
.error-404{ text-align:center; padding:var(--space-5) 0; }
.error-404 .error-actions{ display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin-top:var(--space-3); }

/* ---------- UTILITIES ---------- */
.text-center{ text-align:center; }
.mt-0{ margin-top:0; }
.pagination{ display:flex; gap:8px; justify-content:center; margin-top:var(--space-3); flex-wrap:wrap; }
.pagination a, .pagination span{ padding:8px 14px; border:1px solid var(--color-border); border-radius:var(--radius-sm); background:var(--color-white); }
.pagination .current{ background:var(--color-primary); color:#fff; border-color:var(--color-primary); }

@media (max-width:400px){
  .hero{ padding:var(--space-4) 0; }
}