/* ============================================================
   EPISTEMEUS Library — app.css
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --navy:#17284d;--navy2:#1f3452;--navy3:#223763;
  --gold:#d8a63c;--gold2:#e5c158;--gold-l:#f5f0e6;
  --bg:#f8f7f4;--surface:#fff;--surface2:#f1f0ec;
  --border:#e2e0da;--border2:#c9c5bc;
  --text:#1a1a1a;--text2:#5c5c5c;--text3:#8a8a8a;
  --sh-sm:0 1px 3px rgba(0,0,0,.06);
  --sh:0 4px 12px rgba(0,0,0,.07);
  --sh-lg:0 12px 36px rgba(0,0,0,.1);
  --r:8px;--r-sm:4px;
  --font:'Inter',system-ui,sans-serif;
  --font-d:'Lora',Georgia,serif;
}
html{scroll-behavior:smooth;min-height:100%}
body{
  font-family:var(--font);background:var(--bg);color:var(--text);
  line-height:1.6;-webkit-font-smoothing:antialiased;
  display:flex;flex-direction:column;min-height:100vh;
}
/* push footer to bottom: every direct child except footer is shrinkable, main grows */
body > * { flex-shrink:0 }
body > main, body > .info-page { flex:1 0 auto }
.ft { margin-top:auto }
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}
::selection{background:var(--gold);color:var(--navy)}
::-webkit-scrollbar{width:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:3px}

/* ---- UTIL ---- */
.pg{max-width:1280px;margin:0 auto;padding:0 24px}

/* ============================================================
   HEADER (Pragma-style)
   ============================================================ */
body.menu-open{overflow:hidden}
.hd-header{background:#17284d;border-bottom:2px solid #d8a63c;min-height:82px;padding:0 26px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:200}
.hd-brand{text-decoration:none;display:flex;align-items:center;min-width:0;margin-left:-12px}
.hd-brand-logo{height:72px;width:auto;max-width:400px;object-fit:contain;object-position:left center;display:block;mix-blend-mode:screen;filter:brightness(1.05) contrast(1.05)}

/* hamburger */
.hamburger-btn{display:none;flex-direction:column;justify-content:center;align-items:center;width:40px;height:40px;background:transparent;border:none;cursor:pointer;z-index:1000;padding:0}
.hb-line{display:block;position:relative;width:24px;height:2px;background:#d8a63c;border-radius:1px;transition:background .2s ease}
.hb-line::before,.hb-line::after{content:'';position:absolute;left:0;width:24px;height:2px;background:#d8a63c;border-radius:1px;transition:transform .3s ease,top .3s ease,width .3s ease}
.hb-line::before{top:-7px}
.hb-line::after{top:7px}
.hamburger-btn.active .hb-line{background:transparent}
.hamburger-btn.active .hb-line::before{width:24px;top:0;transform:rotate(45deg)}
.hamburger-btn.active .hb-line::after{width:24px;top:0;transform:rotate(-45deg)}

/* navbar bar */
.hd-navbar{background:#223763;min-height:52px;padding:0 24px;position:relative;z-index:99;display:flex;align-items:center;justify-content:center}
.hd-navbar .navbar-collapse{display:flex;align-items:center;justify-content:center;width:100%}
.hd-navbar ul#navigationPrimary{width:100%;display:flex;align-items:center;justify-content:center;list-style:none;margin:0;padding:0;gap:clamp(18px,2vw,46px)}
.hd-navbar ul#navigationPrimary>li{position:relative;list-style:none}
.hd-navbar ul#navigationPrimary>li>a,.main-menu__nav-link{position:relative;height:52px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:clamp(14px,1.1vw,16px);font-weight:500;text-decoration:none;padding:0 2px;background:none;border:none;white-space:nowrap;transition:color .2s}
.main-menu__nav-link:hover,.main-menu__nav-link:hover span,.main-menu__nav-item.active>.main-menu__nav-link,.main-menu__nav-item.dropdown.show>.main-menu__nav-link,.main-menu__nav-item.dropdown.show>.main-menu__nav-link span{color:#d8a63c}
.main-menu__nav-link:hover::after,.main-menu__nav-item.active>.main-menu__nav-link::after,.main-menu__nav-item.dropdown.show>.main-menu__nav-link::after{content:'';position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:calc(100% + 16px);height:3px;background:#d8a63c;border-radius:2px}
.main-menu__nav-link .dropdown-toggle::after{content:' ▾';font-size:9px;margin-left:4px;opacity:.7}

/* dropdown desktop — mega menu style */
.hd-navbar ul#navigationPrimary>li>ul.dropdown-menu{
  display:none;position:absolute;top:calc(100% + 6px);left:50%;transform:translateX(-50%);
  min-width:520px;z-index:999;
  background:linear-gradient(180deg,#17284d 0%,#1c2f56 100%);
  border-top:3px solid #d8a63c;border-radius:0 0 10px 10px;
  list-style:none;margin:0;padding:12px;
  box-shadow:0 16px 40px rgba(0,0,0,.4);
}
.hd-navbar ul#navigationPrimary>li.dropdown:hover>ul.dropdown-menu,
.hd-navbar ul#navigationPrimary>li.dropdown.show>ul.dropdown-menu{
  display:grid;grid-template-columns:repeat(3,1fr);gap:2px;
  animation:dropFade .25s ease;
}
@keyframes dropFade{from{opacity:0;transform:translate(-50%,-4px)}to{opacity:1;transform:translate(-50%,0)}}
.hd-navbar ul#navigationPrimary>li>ul.dropdown-menu li{list-style:none;margin:0;padding:0}
.hd-navbar ul#navigationPrimary>li>ul.dropdown-menu li a{
  display:flex;align-items:center;gap:8px;
  padding:10px 14px;line-height:1.3;font-size:13px;font-weight:500;
  color:rgba(255,255,255,.82);text-decoration:none;
  background:transparent;border-radius:6px;
  transition:all .18s;
  border:1px solid transparent;
}
.hd-navbar ul#navigationPrimary>li>ul.dropdown-menu li a:hover{
  background:rgba(216,166,60,.12);color:#d8a63c;
  border-color:rgba(216,166,60,.3);transform:translateX(2px);
}
.hd-navbar ul#navigationPrimary>li>ul.dropdown-menu li a::before{
  content:'•';color:#d8a63c;font-size:18px;opacity:.5;
}

/* ---- HERO ---- */
.hero{background:linear-gradient(135deg,var(--navy) 0%,#1b2e52 50%,#0f1f3a 100%);padding:56px 0 48px;overflow:hidden;position:relative}
.hero::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.025'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/svg%3E")}
.hero-inner{display:grid;grid-template-columns:1fr auto;gap:48px;align-items:center;position:relative;z-index:1;min-height:0}
.hero-text .pill{display:inline-flex;align-items:center;background:rgba(216,166,60,.15);border:1px solid rgba(216,166,60,.3);color:var(--gold);font-size:11px;font-weight:600;letter-spacing:.6px;text-transform:uppercase;padding:4px 12px;border-radius:100px;margin-bottom:18px}
.hero-text h1{font-family:var(--font-d);font-size:clamp(28px,4vw,52px);font-weight:700;line-height:1.1;color:#fff;margin-bottom:14px;letter-spacing:-.5px}
.hero-text h1 em{color:var(--gold);font-style:italic}
.hero-text p{color:rgba(255,255,255,.65);font-size:15px;line-height:1.7;max-width:480px;margin-bottom:28px}
.search-form{max-width:500px}
.search-wrap{display:flex;align-items:center;background:rgba(255,255,255,.1);border:1.5px solid rgba(255,255,255,.2);border-radius:50px;overflow:hidden;transition:border-color .2s,box-shadow .2s;position:relative}
.search-wrap:focus-within{border-color:var(--gold);box-shadow:0 0 0 3px rgba(216,166,60,.15)}
.search-ico{position:absolute;left:18px;stroke:rgba(255,255,255,.4);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;width:16px;height:16px;pointer-events:none}
.search-wrap input{flex:1;background:transparent;border:none;padding:13px 16px 13px 44px;color:#fff;font-size:14px;font-family:inherit;outline:none;min-width:0}
.search-wrap input::placeholder{color:rgba(255,255,255,.4)}
.search-wrap button{background:var(--gold);border:none;padding:13px 28px;color:var(--navy);font-weight:700;font-size:13px;cursor:pointer;transition:background .2s;white-space:nowrap;font-family:inherit;flex-shrink:0}
.search-wrap button:hover{background:var(--gold2)}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.tag{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);color:rgba(255,255,255,.7);font-size:12px;font-weight:500;padding:5px 14px;border-radius:100px;cursor:pointer;transition:all .2s}
.tag:hover{background:rgba(216,166,60,.2);border-color:var(--gold);color:var(--gold)}
.hero-covers{display:grid;grid-template-columns:repeat(3,100px);gap:12px;flex-shrink:0}
.hero-covers img{width:100%;aspect-ratio:2/3;object-fit:cover;border-radius:6px;box-shadow:0 6px 20px rgba(0,0,0,.25);transition:transform .3s;display:block}
.hero-covers img:hover{transform:translateY(-4px) scale(1.02)}
.hero-covers img:nth-child(2){margin-top:24px}

/* ---- SECTION ---- */
section{padding:36px 0}
.sec-hd{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.sec-hd h2{font-family:var(--font-d);font-size:22px;font-weight:700;letter-spacing:-.2px}
.sec-hd h2 span{color:var(--gold)}
.see-all{background:none;border:1px solid var(--border);padding:5px 14px;border-radius:100px;font-size:12px;color:var(--text2);cursor:pointer;transition:all .2s;font-family:inherit}
.see-all:hover{border-color:var(--gold);color:var(--gold)}

/* ---- BOOK GRID & CARDS ---- */
.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:18px;align-items:stretch}
.book-card{display:flex;flex-direction:column}
.book-card .book-meta{flex:1;display:flex;flex-direction:column}
.book-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);overflow:hidden;cursor:pointer;transition:transform .25s,box-shadow .25s,border-color .2s}
.book-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:var(--gold)}
.book-cover-wrap{position:relative;aspect-ratio:2/3;background:var(--surface2);overflow:hidden}
.book-cover-wrap img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;transition:transform .35s;opacity:1}
.book-card:hover .book-cover-wrap img{transform:scale(1.04)}
.book-cover-wrap .no-cover{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:11px;color:var(--text3);font-weight:600;text-transform:uppercase;letter-spacing:.5px;padding:16px;text-align:center}
.bdg{position:absolute;top:8px;right:8px;font-size:9px;font-weight:700;padding:3px 9px;border-radius:100px;letter-spacing:.3px;text-transform:uppercase}
.bdg-ol{background:var(--gold);color:var(--navy)}
.bdg-wl{background:#2d8a4e;color:#fff}
.book-meta{padding:12px 12px 14px}
.book-meta h4{font-size:13px;font-weight:600;line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:4px}
.book-meta .au{font-size:11px;color:var(--text2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.book-meta .yr{font-size:10px;color:var(--text3);margin-top:6px;display:block}

/* ---- SKELETON ---- */
.skeleton .book-cover-wrap{background:var(--surface2)}
.sk-img{position:absolute;inset:0;background:linear-gradient(90deg,var(--surface2) 25%,#e8e6e0 50%,var(--surface2) 75%);background-size:200% 100%;animation:shimmer 1.4s infinite}
.sk-line{height:10px;border-radius:4px;background:linear-gradient(90deg,var(--surface2) 25%,#e8e6e0 50%,var(--surface2) 75%);background-size:200% 100%;animation:shimmer 1.4s infinite;margin-bottom:6px}
.sk-title{width:85%}
.sk-au{width:60%}
.sk-yr{width:35%}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* ---- RESULTS ---- */
.results-hd{display:flex;align-items:flex-start;gap:16px;padding:28px 0 20px;border-bottom:1px solid var(--border);margin-bottom:24px}
.results-hd h2{font-family:var(--font-d);font-size:22px;font-weight:700}
.results-meta{font-size:13px;color:var(--text2);margin-top:3px}
.back-btn{display:inline-flex;align-items:center;gap:6px;background:none;border:1px solid var(--border);padding:8px 16px;border-radius:var(--r-sm);font-size:13px;color:var(--text2);cursor:pointer;transition:all .2s;white-space:nowrap;flex-shrink:0;font-family:inherit}
.back-btn:hover{border-color:var(--navy);color:var(--navy)}
.load-more-btn{background:var(--navy);color:#fff;border:none;padding:11px 32px;border-radius:var(--r-sm);font-size:13px;font-weight:600;cursor:pointer;transition:opacity .2s;font-family:inherit}
.load-more-btn:hover{opacity:.85}

/* ---- SIDEBAR ---- */
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:400;display:none;backdrop-filter:blur(2px)}
.overlay.show{display:block}
.sidebar{position:fixed;top:0;right:-100%;width:100%;max-width:860px;height:100%;background:var(--bg);z-index:401;overflow-y:auto;transition:right .35s cubic-bezier(.22,1,.36,1);box-shadow:-6px 0 32px rgba(0,0,0,.12)}
.sidebar.show{right:0}
.sidebar-actions{position:sticky;top:0;display:flex;gap:8px;justify-content:flex-end;padding:12px 16px 0;background:var(--bg);z-index:10}
.sidebar-share, .sidebar-close{width:36px;height:36px;border-radius:50%;background:var(--surface);border:1px solid var(--border);font-size:14px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;color:var(--text2)}
.sidebar-share:hover{background:var(--gold);color:var(--navy);border-color:var(--gold)}
.sidebar-close{font-size:16px}
.sidebar-close:hover{background:var(--navy);color:#fff;border-color:var(--navy);transform:rotate(90deg)}
.sb-body{padding:24px 36px 48px}
.sb-loading{display:flex;align-items:center;justify-content:center;height:300px}
.sb-top{display:flex;gap:32px;margin-bottom:32px}
.sb-cover{flex-shrink:0;width:200px}
.sb-cover img{width:100%;border-radius:var(--r);box-shadow:var(--sh-lg);opacity:1}
.sb-cover .nc{width:100%;aspect-ratio:2/3;background:var(--surface2);border-radius:var(--r);display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--text3);font-weight:600;padding:16px;text-align:center}
.sb-info h1{font-family:var(--font-d);font-size:28px;font-weight:700;line-height:1.2;margin-bottom:6px}
.sb-info .sb-au{font-size:15px;color:var(--text2);margin-bottom:20px}
.sb-meta{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px;margin-bottom:24px}
.sb-meta-item{background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--gold);border-radius:var(--r-sm);padding:10px 14px}
.sb-meta-item .lbl{font-size:10px;text-transform:uppercase;letter-spacing:.8px;color:var(--text3);font-weight:600}
.sb-meta-item .val{font-size:13px;font-weight:600;margin-top:3px;word-break:break-all}
.sb-desc{margin-bottom:28px}
.sb-desc h3{font-size:12px;text-transform:uppercase;letter-spacing:.8px;color:var(--text3);font-weight:700;margin-bottom:10px}
.sb-desc p{font-size:14px;line-height:1.75;color:#444}
.sb-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:28px}
.sb-tag{background:var(--gold-l);color:#8b7a4e;font-size:11px;font-weight:600;padding:4px 12px;border-radius:100px;cursor:pointer;transition:background .2s}
.sb-tag:hover{background:var(--gold);color:var(--navy)}
.sb-actions{display:flex;flex-wrap:wrap;gap:8px;padding:20px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin-bottom:28px}
.sb-similar h3{font-family:var(--font-d);font-size:18px;font-weight:700;margin-bottom:16px}
.sb-similar .book-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:12px}
.sb-similar .book-meta h4{font-size:12px}

/* ---- BUTTONS ---- */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:var(--r-sm);font-size:13px;font-weight:600;border:none;cursor:pointer;transition:all .2s;font-family:inherit;text-decoration:none}
.btn-primary{background:var(--navy);color:#fff}
.btn-primary:hover{background:var(--navy2)}
.btn-gold{background:var(--gold);color:var(--navy)}
.btn-gold:hover{background:var(--gold2)}
.btn-outline{background:transparent;border:1.5px solid var(--border);color:var(--text2)}
.btn-outline:hover{border-color:var(--navy);color:var(--navy)}
.btn-ghost{background:transparent;border:1.5px solid rgba(255,255,255,.2);color:rgba(255,255,255,.7)}
.btn-ghost:hover{border-color:rgba(255,255,255,.5);color:#fff}

/* ---- MODAL ---- */
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.65);z-index:600;display:none;align-items:center;justify-content:center;padding:20px;backdrop-filter:blur(4px)}
.modal-bg.show{display:flex}
.modal{background:var(--surface);border-radius:12px;width:100%;max-width:920px;max-height:92vh;display:flex;flex-direction:column;box-shadow:0 24px 64px rgba(0,0,0,.2);overflow:hidden}
.modal-hd{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--border);flex-shrink:0}
.modal-hd h3{font-weight:700;font-size:16px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding-right:16px}
.modal-hd button{background:none;border:none;font-size:22px;cursor:pointer;color:var(--text3);width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:background .15s;flex-shrink:0}
.modal-hd button:hover{background:var(--surface2);color:var(--text)}
.modal-bd{flex:1;min-height:420px;position:relative;overflow:hidden}
.modal-bd iframe{position:absolute;inset:0;width:100%;height:100%;border:none}
.modal-load{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:var(--bg)}
.modal-ft{display:flex;align-items:center;gap:8px;padding:12px 20px;border-top:1px solid var(--border);flex-wrap:wrap;flex-shrink:0}
.modal-ft .btn{padding:8px 16px;font-size:12px}

/* ---- READER (mobile-optimized) ---- */
.reader{position:fixed;inset:0;z-index:700;background:#1a1a1a;display:none;flex-direction:column}
.reader.show{display:flex}
.reader-hd{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 14px;background:#1f1f1f;
  border-bottom:1px solid rgba(255,255,255,.08);flex-shrink:0;
  gap:10px;min-height:56px;
}
.reader-hd h3{
  color:#fff;font-size:14px;font-weight:600;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  flex:1;text-align:center;margin:0 8px;
}
.reader-back, .reader-switch{
  display:flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.1);border:none;color:#fff;
  padding:9px 14px;border-radius:8px;
  cursor:pointer;font-size:13px;font-weight:600;
  transition:background .2s;font-family:inherit;
  flex-shrink:0;
}
.reader-back svg, .reader-switch svg{flex-shrink:0}
.reader-back:hover, .reader-switch:hover{background:rgba(255,255,255,.18)}
.reader-back:active{background:var(--gold);color:var(--navy)}
.reader-switch{background:var(--gold);color:var(--navy)}
.reader-switch:hover{background:var(--gold2)}
.reader-bd{flex:1;position:relative;overflow:hidden}
.reader-bd iframe{width:100%;height:100%;border:none;display:block}
.reader-load{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:14px;background:#1a1a1a;color:rgba(255,255,255,.6);font-size:13px}
.reader-load .spinner{border-color:rgba(255,255,255,.15);border-top-color:var(--gold)}

@media(max-width:600px){
  .reader-hd{padding:8px 10px;min-height:52px;gap:6px}
  .reader-hd h3{font-size:13px;margin:0 4px}
  .reader-back, .reader-switch{padding:8px 10px;font-size:12px}
  .reader-back span, .reader-switch span{display:none}
  .reader-back{background:rgba(216,166,60,.2);color:var(--gold)}
}

/* ---- SPINNER ---- */
.spinner{width:28px;height:28px;border:2.5px solid var(--border);border-top-color:var(--gold);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---- EMPTY ---- */
.empty{grid-column:1/-1;text-align:center;padding:60px 20px;color:var(--text3);font-size:14px}
.empty .spinner{margin:0 auto 12px}

/* ---- SIDEBAR EXTRA ---- */
.sb-badges{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.sb-badge{display:inline-flex;align-items:center;gap:5px;padding:4px 12px;border-radius:100px;font-size:11px;font-weight:700;letter-spacing:.3px;text-transform:uppercase}
.sb-badge-free{background:#e6f4ea;color:#2d8a4e}
.sb-badge-dl{background:#e8f0fe;color:#1a4fbe}
.sb-badge-wl{background:#2d8a4e;color:#fff}
.sb-divider{border:none;border-top:1px solid var(--border);margin:20px 0}
.sb-info-row{display:flex;align-items:center;justify-content:space-between;padding:9px 0;border-bottom:1px solid var(--border);font-size:13px}
.sb-info-row:last-child{border-bottom:none}
.sb-info-row .lbl{color:var(--text3);font-weight:500}
.sb-info-row .val{color:var(--text);font-weight:600;text-align:right}
.sb-info-table{margin-bottom:24px}

/* ---- FOOTER ---- */
.ft{background:#0f1f3a;margin-top:64px;padding:48px 0 20px;color:rgba(255,255,255,.65)}
.ft-in{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.07)}
.ft-brand .ft-logo{height:52px;mix-blend-mode:screen;filter:brightness(1.1);margin-bottom:12px}
.ft-brand p{font-size:13px;color:rgba(255,255,255,.45);line-height:1.7;max-width:280px}
.ft-col h4{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--gold);margin-bottom:14px}
.ft-col a{display:block;font-size:13px;color:rgba(255,255,255,.5);margin-bottom:9px;transition:color .2s}
.ft-col a:hover{color:var(--gold)}
.ft-bt{padding-top:18px;font-size:12px;color:rgba(255,255,255,.3)}

/* ---- RESPONSIVE ---- */
@media(max-width:900px){
  .hero-covers{display:none}
  .hero-inner{grid-template-columns:1fr}
  .ft-in{grid-template-columns:1fr 1fr;gap:28px}
  .sb-top{flex-direction:column;gap:20px}
  .sb-cover{width:160px}
  .sb-body{padding:24px 20px 40px}
  .sb-info h1{font-size:22px}
}

/* ============================================================
   MOBILE NAV (≤ 900px) — refined drawer
   ============================================================ */
@media(max-width:900px){
  .hamburger-btn{display:flex}
  .hd-header{min-height:68px;padding:12px 18px;border-bottom:3px solid #d8a63c;z-index:1001}
  .hd-brand-logo{height:54px;max-width:240px}

  /* Important: nav container must be ABOVE backdrop */
  .hd-navbar{position:static;min-height:0;background:transparent;padding:0;display:block;z-index:1000}

  /* full-height drawer */
  .hd-navbar .navbar-collapse{
    display:block;
    position:fixed;top:0;right:-100%;width:min(340px,88vw);
    height:100vh;
    background:linear-gradient(170deg,#1a2d57 0%,#17284d 100%);
    overflow-y:auto;
    z-index:1002;
    box-shadow:-8px 0 40px rgba(0,0,0,.45);
    transition:right .32s cubic-bezier(.4,0,.2,1);
    padding-bottom:32px;
    visibility:hidden;
  }
  .hd-navbar .navbar-collapse.show{
    right:0;
    visibility:visible;
  }

  /* backdrop — use a real fixed element via body::before */
  body.menu-open::before{
    content:'';
    position:fixed;inset:0;
    background:rgba(0,0,0,.55);
    z-index:1000;
    backdrop-filter:blur(2px);
    -webkit-backdrop-filter:blur(2px);
    animation:fadeIn .2s ease;
  }
  @keyframes fadeIn{from{opacity:0}to{opacity:1}}
  body.menu-open{overflow:hidden}

  /* drawer header spacer */
  .hd-navbar .navbar-collapse::before{
    content:'';display:block;height:68px;background:rgba(0,0,0,.2);
    border-bottom:2px solid #d8a63c;margin-bottom:8px;
  }

  .hd-navbar ul#navigationPrimary{
    flex-direction:column;align-items:stretch;width:100%;gap:0;
    padding:8px 0;list-style:none;margin:0;
  }
  .hd-navbar ul#navigationPrimary>li{
    width:100%;position:relative;
  }
  .hd-navbar ul#navigationPrimary>li>a,.main-menu__nav-link{
    width:100%;height:auto;display:flex;align-items:center;justify-content:space-between;
    padding:13px 22px;font-size:15px;font-weight:500;line-height:1.4;
    color:rgba(255,255,255,.88);text-decoration:none;letter-spacing:.01em;
    border-left:3px solid transparent;
    transition:background .18s ease,color .18s ease,border-color .18s ease,padding-left .18s ease;
  }
  .hd-navbar ul#navigationPrimary>li>a:hover,.main-menu__nav-link:hover,
  .hd-navbar ul#navigationPrimary>li>a:active{
    background:rgba(216,166,60,.08);color:#d8a63c;border-left-color:#d8a63c;
  }
  .main-menu__nav-link::after{display:none}

  /* subjects dropdown */
  .hd-navbar ul#navigationPrimary>li.dropdown>a .dropdown-toggle::after{
    content:'';display:inline-block;width:8px;height:8px;
    border-right:2px solid currentColor;border-bottom:2px solid currentColor;
    transform:rotate(45deg);margin-left:auto;margin-right:4px;
    transition:transform .25s;opacity:.7;
  }
  .hd-navbar ul#navigationPrimary>li.dropdown.show>a .dropdown-toggle::after{
    transform:rotate(-135deg);
  }

  /* Subjects dropdown — grid 2 column biar rapi */
  .hd-navbar ul#navigationPrimary>li>ul.dropdown-menu{
    position:static;transform:none;width:100%;margin:0;
    box-shadow:none;border:none;
    background:rgba(0,0,0,.25);
    display:none;padding:0;
  }
  .hd-navbar ul#navigationPrimary>li.dropdown:hover>ul.dropdown-menu{display:none}
  .hd-navbar ul#navigationPrimary>li.dropdown.show>ul.dropdown-menu{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:0;
    padding:6px;
    animation:dropdownIn .25s ease;
  }
  @keyframes dropdownIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}
  .hd-navbar ul#navigationPrimary>li>ul.dropdown-menu li{margin:0;list-style:none}
  .hd-navbar ul#navigationPrimary>li>ul.dropdown-menu li a{
    padding:9px 14px;font-size:13px;font-weight:500;
    color:rgba(255,255,255,.75);display:block;text-decoration:none;
    transition:all .15s;border-radius:5px;
    text-align:center;
    border:1px solid transparent;
    margin:1px;
  }
  .hd-navbar ul#navigationPrimary>li>ul.dropdown-menu li a:hover{
    color:#d8a63c;background:rgba(216,166,60,.1);
    border-color:rgba(216,166,60,.3);
  }

  /* hero & content */
  .hero{padding:28px 0 24px}
  .hero-text h1{font-size:30px}
  .hero-text p{font-size:14px}
  .book-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:14px}
  .sec-hd h2{font-size:19px}
  .sidebar{max-width:100%}
  .ft-in{grid-template-columns:1fr 1fr;gap:28px}
}

@media(max-width:600px){
  .pg{padding:0 12px}
  .hd-header{padding:10px 14px;min-height:60px}
  .hd-brand-logo{height:44px;max-width:200px}
  .hd-navbar .navbar-collapse::before{height:60px}
  .hd-header .hd-brand-name,.brand-name{font-size:20px}
  /* tighter detail panel for phones */
  .sb-top{flex-direction:row !important;gap:14px;align-items:flex-start}
  .sb-cover{width:120px;flex-shrink:0}
  .sb-info h1{font-size:18px;line-height:1.25}
  .sb-info .sb-au{font-size:13px;margin-bottom:10px}
  .sb-badges{margin-bottom:10px;flex-wrap:wrap}
  .sb-badge{padding:3px 8px;font-size:10px}
  .sb-actions{
    display:grid !important;
    grid-template-columns:1fr 1fr;
    gap:8px;padding:14px 0;margin-bottom:18px;
  }
  .sb-actions .btn{width:100%;padding:10px 12px;font-size:12px;justify-content:center;flex-direction:row}
  .sb-actions .btn-gold{grid-column:1/-1}
  .sb-info-table{margin-bottom:18px}
  .sb-info-row{flex-direction:column;align-items:flex-start;gap:3px;padding:8px 0}
  .sb-info-row .val{text-align:left}
  .hero-text h1{font-size:24px}
  .hero{padding:24px 0 20px}
  .search-wrap input{padding:11px 14px 11px 40px;font-size:13px}
  .search-wrap button{padding:11px 18px;font-size:12px}
  .hero-tags{gap:6px}
  .tag{padding:4px 10px;font-size:11px}
  .book-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .book-meta{padding:9px 10px 12px}
  .book-meta h4{font-size:12px}
  .book-meta .au{font-size:10px}
  .sec-hd h2{font-size:17px}
  .sb-body{padding:14px 14px 32px}
  .sb-info h1{font-size:19px}
  .sb-meta{grid-template-columns:1fr 1fr}
  .sb-actions{flex-direction:column}
  .sb-actions .btn{width:100%;justify-content:center}
  .modal-bd{min-height:260px}
  .ft-in{grid-template-columns:1fr;gap:24px}
}

/* ---- SIDEBAR EXTRAS ---- */
.sb-badges{display:flex;flex-wrap:wrap;gap:6px}
.sb-badge{display:inline-block;font-size:10px;font-weight:700;padding:3px 10px;border-radius:100px;letter-spacing:.3px;text-transform:uppercase}
.sb-badge-free{background:var(--gold);color:var(--navy)}
.sb-badge-wl{background:#2d8a4e;color:#fff}
.sb-badge-dl{background:var(--surface2);color:var(--text2);border:1px solid var(--border)}
.sb-info-table{margin-bottom:20px}
.sb-info-row{display:flex;gap:12px;padding:7px 0;border-bottom:1px solid var(--border);font-size:13px;align-items:baseline}
.sb-info-row:first-child{border-top:1px solid var(--border)}
.sb-info-row .lbl{color:var(--text3);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.6px;width:90px;flex-shrink:0}
.sb-info-row .val{color:var(--text);word-break:break-word}

/* ---- LOAD MORE ---- */
#loadMoreWrap{text-align:center;padding:32px 0}

/* ---- INFO PAGES (Pragma-style) ---- */
.info-hero{background:linear-gradient(135deg,#17284d 0%,#1f3260 60%,#17284d 100%);color:#fff;padding:56px 24px 64px;position:relative;overflow:hidden;border-bottom:3px solid var(--gold)}
.info-hero::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/svg%3E")}
.info-hero-in{max-width:900px;margin:0 auto;position:relative;z-index:1}
.info-eyebrow{display:inline-flex;align-items:center;background:rgba(216,166,60,.18);border:1px solid rgba(216,166,60,.35);color:var(--gold);font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;padding:5px 14px;border-radius:100px;margin-bottom:18px}
.info-hero h1{font-family:var(--font-d);font-size:clamp(32px,4vw,46px);font-weight:700;line-height:1.15;margin-bottom:12px;color:#fff}
.info-hero p{color:rgba(255,255,255,.7);font-size:16px;line-height:1.7;max-width:680px}

.info-page{padding:48px 0 80px;background:var(--bg)}
.info-wrap{max-width:820px;margin:0 auto;padding:0 24px}
.info-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:40px 44px;box-shadow:var(--sh-sm)}
.info-page h2{font-family:var(--font-d);font-size:22px;font-weight:700;color:var(--navy);margin:32px 0 12px;padding-bottom:10px;border-bottom:2px solid var(--gold);display:inline-block}
.info-page h2:first-child{margin-top:0}
.info-page p{font-size:15px;color:#3a3a3a;line-height:1.85;margin-bottom:14px}
.info-page ul{padding-left:0;list-style:none;margin-bottom:16px}
.info-page ul li{font-size:15px;color:#3a3a3a;line-height:1.85;margin-bottom:10px;padding-left:22px;position:relative}
.info-page ul li::before{content:'';position:absolute;left:0;top:.7em;width:8px;height:8px;background:var(--gold);border-radius:50%}
.info-page ul li strong{color:var(--navy)}
.info-page a{color:var(--gold);text-decoration:underline;text-underline-offset:3px;transition:color .15s}
.info-page a:hover{color:#b8881f}
.contact-card{background:linear-gradient(135deg,#fafaf7 0%,#fff 100%);border:1px solid var(--border);border-left:4px solid var(--gold);border-radius:8px;padding:22px 26px;margin-top:18px}
.contact-card p{margin-bottom:12px;font-size:15px}
.contact-card p:last-child{margin-bottom:0}
@media(max-width:700px){
  .info-hero{padding:36px 20px 44px}
  .info-hero h1{font-size:26px}
  .info-hero p{font-size:14px}
  .info-card{padding:26px 22px}
  .info-page h2{font-size:18px}
  .info-page p,.info-page ul li{font-size:14px}
}