/*
Theme Name: NCTB Books Pro
Theme URI: https://example.com/
Author: Your Name
Description: All-in-one textbook library theme. Upload PDF books from the admin (PDF Books menu) and they open in a built-in page-flip reader on the site. Class-wise buttons, madrasa section, notices, Bengali-friendly.
Version: 2.0.0
License: GPL-2.0-or-later
Text Domain: nctb-books
*/

:root{
  --green:#12482A;
  --green-2:#1c6b3e;
  --green-soft:#e8f3ec;
  --ink:#1b1f1d;
  --muted:#5f6b64;
  --line:#dfe6e1;
  --bg:#f6f8f7;
  --white:#fff;
  --radius:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);line-height:1.7;
  font-family:"Hind Siliguri","Noto Sans Bengali","Segoe UI",system-ui,sans-serif;
}
a{color:var(--green-2);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.skip-link{position:absolute;left:-999px}
.skip-link:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:99}

/* Header */
.site-header{background:var(--green);color:#fff;position:sticky;top:0;z-index:50;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:#fff}
.brand:hover{text-decoration:none}
.brand img{width:44px;height:44px;border-radius:8px;background:#fff}
.brand-text strong{display:block;font-size:1.1rem;line-height:1.2}
.brand-text span{font-size:.78rem;opacity:.85}
.main-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:6px;flex-wrap:wrap}
.main-nav a{display:block;color:#fff;padding:8px 14px;border-radius:999px;font-weight:600;font-size:.95rem}
.main-nav a:hover,.main-nav .current-menu-item a{background:rgba(255,255,255,.18);text-decoration:none}
.menu-toggle{display:none;background:rgba(255,255,255,.15);color:#fff;border:0;border-radius:8px;padding:8px 12px;font-size:1rem;cursor:pointer}

/* Hero */
.hero{background:linear-gradient(135deg,var(--green),var(--green-2));color:#fff;padding:36px 0 44px;text-align:center}
.hero h1{margin:0 0 6px;font-size:clamp(1.5rem,4vw,2.2rem)}
.hero p{margin:0 0 18px;opacity:.9}
.search-form{display:flex;max-width:560px;margin:0 auto;background:#fff;border-radius:999px;overflow:hidden;box-shadow:0 6px 20px rgba(0,0,0,.2)}
.search-form input[type=search]{flex:1;border:0;padding:14px 20px;font-size:1rem;outline:none;font-family:inherit}
.search-form button{border:0;background:#f5b301;color:#222;font-weight:700;padding:0 24px;cursor:pointer;font-family:inherit}

/* Sections */
.section{padding:28px 0 6px}
.section-title{display:flex;align-items:center;justify-content:space-between;margin:0 0 14px;font-size:1.3rem;color:var(--green)}
.section-title a{font-size:.9rem;font-weight:600}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:18px}
.card h3{margin:0 0 12px;font-size:1.05rem;color:var(--green)}
.card p.sub{margin:-6px 0 12px;color:var(--muted);font-size:.92rem}
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}

/* Class chips */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  min-width:56px;text-align:center;padding:12px 18px;border-radius:10px;background:var(--green-soft);
  color:var(--green);font-weight:700;font-size:1.15rem;border:1px solid #cfe4d6;transition:.15s;
}
.chip:hover{background:var(--green);color:#fff;text-decoration:none;transform:translateY(-2px)}

/* Lists */
.post-list{list-style:none;margin:0;padding:0}
.post-list li{padding:10px 0;border-bottom:1px dashed var(--line)}
.post-list li:last-child{border:0}
.post-list a{color:var(--ink);font-weight:500}
.post-list a:hover{color:var(--green-2)}
.post-list time{display:block;font-size:.78rem;color:var(--muted)}

.cat-cloud{display:flex;flex-wrap:wrap;gap:8px}
.cat-cloud a{padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);font-size:.92rem}
.cat-cloud a:hover{background:var(--green);color:#fff;text-decoration:none}

.year-links{display:flex;flex-wrap:wrap;gap:10px}
.btn{display:inline-block;background:var(--green);color:#fff;padding:10px 20px;border-radius:10px;font-weight:700;border:0;cursor:pointer;font-family:inherit}
.btn:hover{background:var(--green-2);text-decoration:none;color:#fff}
.btn.alt{background:#f5b301;color:#222}

/* Posts */
.content-wrap{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;padding:24px 0}
.entry{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.entry h1{margin-top:0;color:var(--green);line-height:1.35}
.entry .meta{color:var(--muted);font-size:.85rem;margin-bottom:14px}
.entry .thumb{margin:0 0 16px;border-radius:10px;overflow:hidden}
.entry table{border-collapse:collapse;width:100%;margin:12px 0}
.entry th,.entry td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.entry th{background:var(--green-soft)}
.sidebar .widget{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:16px}
.sidebar .widget-title{margin:0 0 8px;font-size:1rem;color:var(--green)}
.sidebar ul{margin:0;padding-left:18px}

/* Download box */
.dl-box{border:2px solid var(--green);background:var(--green-soft);border-radius:var(--radius);padding:18px;margin:18px 0;text-align:center}
.dl-box h3{margin:0 0 4px;color:var(--green)}
.dl-box small{display:block;color:var(--muted);margin-bottom:12px}
.dl-box .btn{margin:4px}
.pdf-viewer{width:100%;height:640px;border:1px solid var(--line);border-radius:10px;margin-top:12px}

/* Archive */
.archive-head{padding:24px 0 0}
.archive-head h1{margin:0;color:var(--green)}
.post-card{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin-bottom:14px}
.post-card img{width:110px;height:80px;object-fit:cover;border-radius:8px;flex:none}
.post-card h2{margin:0 0 4px;font-size:1.05rem}
.post-card h2 a{color:var(--ink)}
.post-card p{margin:0;color:var(--muted);font-size:.9rem}
.pagination{display:flex;gap:6px;flex-wrap:wrap;margin:18px 0}
.pagination .page-numbers{padding:8px 14px;border:1px solid var(--line);border-radius:8px;background:#fff}
.pagination .current{background:var(--green);color:#fff;border-color:var(--green)}

/* Footer */
.site-footer{background:var(--green);color:#fff;margin-top:32px;padding:26px 0;text-align:center}
.site-footer a{color:#cfe9d8}
.footer-menu{list-style:none;margin:10px 0;padding:0;display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.site-footer small{opacity:.85}

@media (max-width:820px){
  .content-wrap{grid-template-columns:1fr}
  .menu-toggle{display:block}
  .main-nav{display:none;width:100%}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column}
  .pdf-viewer{height:480px}
}