/* ==========================================================================
   KazmiBooks — Main Design System
   ========================================================================== */

:root{
  --kb-primary:#2563EB;
  --kb-primary-dark:#1D4ED8;
  --kb-secondary:#0EA5E9;
  --kb-accent:#10B981;
  --kb-warning:#F59E0B;
  --kb-danger:#EF4444;
  --kb-purple:#7C3AED;
  --kb-bg:#F8FAFC;
  --kb-card:#FFFFFF;
  --kb-text:#0F172A;
  --kb-text-muted:#64748B;
  --kb-border:#E2E8F0;
  --kb-radius-sm:10px;
  --kb-radius:16px;
  --kb-radius-lg:24px;
  --kb-shadow-sm:0 2px 8px rgba(15,23,42,.06);
  --kb-shadow:0 8px 30px rgba(15,23,42,.08);
  --kb-shadow-lg:0 20px 60px rgba(15,23,42,.12);
  --kb-gradient:linear-gradient(135deg,var(--kb-primary) 0%,var(--kb-secondary) 50%,var(--kb-purple) 100%);
  --kb-header-h:78px;
  --font-heading:'Montserrat',sans-serif;
  --font-body:'Poppins',sans-serif;
  --kb-transition:all .3s cubic-bezier(.4,0,.2,1);
}

[data-theme="dark"]{
  --kb-bg:#0F172A;
  --kb-card:#1E293B;
  --kb-text:#F1F5F9;
  --kb-text-muted:#94A3B8;
  --kb-border:#334155;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--kb-bg);
  color:var(--kb-text);
  transition:background .35s ease,color .35s ease;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;line-height:1.25;margin:0 0 .5em;color:var(--kb-text);}
p{line-height:1.7;color:var(--kb-text-muted);margin:0 0 1em;}
a{text-decoration:none;color:inherit;}
ul{list-style:none;margin:0;padding:0;}
button{font-family:var(--font-body);cursor:pointer;border:none;background:none;color:inherit;}
img{max-width:100%;height:auto;display:block;}
:focus-visible{outline:2px solid var(--kb-primary);outline-offset:2px;}

.kb-container{max-width:1280px;margin:0 auto;padding:0 24px;}
.kb-container-narrow{max-width:800px;}

/* ---------- Buttons ---------- */
.kb-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-family:var(--font-heading);font-weight:600;
  font-size:.95rem;transition:var(--kb-transition);position:relative;overflow:hidden;white-space:nowrap;
}
.kb-btn-primary{background:var(--kb-gradient);color:#fff;box-shadow:0 6px 20px rgba(37,99,235,.35);}
.kb-btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(37,99,235,.45);}
.kb-btn-outline{background:transparent;border:1.5px solid var(--kb-border);color:var(--kb-text);}
.kb-btn-outline:hover{border-color:var(--kb-primary);color:var(--kb-primary);}
.kb-btn-sm{padding:9px 18px;font-size:.85rem;}
.kb-btn-lg{padding:16px 34px;font-size:1.05rem;}
.kb-btn-block{width:100%;}
.kb-btn::after{
  content:'';position:absolute;inset:0;background:rgba(255,255,255,.35);
  transform:scale(0);border-radius:50%;opacity:0;transition:transform .5s,opacity .8s;
}
.kb-btn:active::after{transform:scale(3);opacity:1;transition:0s;}

.kb-chip{
  display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:999px;
  background:rgba(255,255,255,.7);backdrop-filter:blur(8px);border:1px solid var(--kb-border);
  font-weight:500;font-size:.88rem;transition:var(--kb-transition);
}
.kb-chip:hover{background:var(--kb-primary);color:#fff;transform:translateY(-3px);border-color:var(--kb-primary);}

/* ==========================================================================
   Header
   ========================================================================== */
.kb-reading-progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--kb-gradient);z-index:9999;transition:width .1s;}

.kb-announcement-bar{background:var(--kb-gradient);color:#fff;font-size:.85rem;font-weight:500;}
.kb-announcement-inner{display:flex;align-items:center;justify-content:center;gap:10px;padding:8px 24px;position:relative;}
.kb-announcement-close{position:absolute;right:24px;color:#fff;opacity:.8;}
.kb-announcement-close:hover{opacity:1;}

.kb-header{
  position:sticky;top:0;z-index:1000;height:var(--kb-header-h);display:flex;flex-direction:column;
  background:rgba(248,250,252,.75);backdrop-filter:blur(16px) saturate(160%);
  border-bottom:1px solid rgba(226,232,240,.6);transition:var(--kb-transition);
}
[data-theme="dark"] .kb-header{background:rgba(15,23,42,.75);border-color:rgba(51,65,85,.6);}
.kb-header.kb-scrolled{box-shadow:var(--kb-shadow-sm);}

.kb-header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--kb-header-h);gap:24px;}

.kb-logo-text{font-family:var(--font-heading);font-weight:800;font-size:1.5rem;color:var(--kb-text);}
.kb-logo-text span{color:var(--kb-primary);}
.custom-logo{max-height:48px;width:auto;}

.kb-primary-nav{flex:1;display:flex;justify-content:center;}
.kb-nav-menu{display:flex;align-items:center;gap:6px;position:relative;}
.kb-menu-item{position:relative;}
.kb-menu-link{
  display:flex;align-items:center;gap:4px;padding:10px 16px;border-radius:999px;
  font-weight:500;font-size:.94rem;transition:var(--kb-transition);
}
.kb-menu-link:hover{background:rgba(37,99,235,.08);color:var(--kb-primary);}
.kb-caret{font-size:.75rem;transition:transform .25s;}
.kb-has-mega:hover .kb-caret{transform:rotate(180deg);}

.kb-mega-panel{
  position:absolute;top:calc(100% + 14px);left:50%;transform:translateX(-50%) translateY(10px);
  width:min(880px,90vw);background:var(--kb-card);border-radius:var(--kb-radius);box-shadow:var(--kb-shadow-lg);
  border:1px solid var(--kb-border);opacity:0;visibility:hidden;transition:var(--kb-transition);z-index:200;
}
.kb-has-mega:hover .kb-mega-panel{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);}
.kb-mega-panel-inner{padding:28px;}
.kb-mega-columns{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.kb-mega-col > .kb-menu-link{font-family:var(--font-heading);font-weight:700;color:var(--kb-primary);padding:6px 0;margin-bottom:6px;border-bottom:2px solid var(--kb-border);}
.kb-mega-subcol{display:flex;flex-direction:column;gap:2px;}
.kb-mega-subcol .kb-menu-link{padding:7px 4px;font-size:.88rem;border-radius:8px;}
.kb-mega-subcol .kb-menu-link:hover{background:var(--kb-bg);padding-left:10px;}

.kb-header-actions{display:flex;align-items:center;gap:10px;}
.kb-icon-btn{
  width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:1.15rem;background:transparent;transition:var(--kb-transition);position:relative;
}
.kb-icon-btn:hover{background:rgba(37,99,235,.08);color:var(--kb-primary);}
.kb-notif-dot{position:absolute;top:8px;right:9px;width:8px;height:8px;border-radius:50%;background:var(--kb-danger);}
.kb-icon-sun{display:none;}
[data-theme="dark"] .kb-icon-moon{display:none;}
[data-theme="dark"] .kb-icon-sun{display:inline;}
.kb-show-mobile{display:none;}

/* Search panel */
.kb-search-panel{
  max-height:0;overflow:hidden;transition:max-height .35s ease;border-top:1px solid transparent;
}
.kb-search-panel.kb-open{max-height:300px;border-color:var(--kb-border);}
.kb-search-form{
  display:flex;align-items:center;gap:12px;padding:18px 0;font-size:1.1rem;
}
.kb-search-form input{
  flex:1;border:none;background:transparent;font-size:1.1rem;color:var(--kb-text);font-family:var(--font-body);
}
.kb-search-form input:focus{outline:none;}
.kb-search-suggestions{padding-bottom:16px;display:none;}
.kb-search-suggestions.kb-has-results{display:block;}
.kb-suggestion-item{display:flex;align-items:center;gap:12px;padding:10px 8px;border-radius:10px;transition:var(--kb-transition);}
.kb-suggestion-item:hover{background:var(--kb-bg);}
.kb-suggestion-thumb{width:44px;height:44px;border-radius:8px;object-fit:cover;background:var(--kb-bg);flex-shrink:0;}
.kb-suggestion-title{font-weight:500;font-size:.92rem;}
.kb-suggestion-type{font-size:.75rem;color:var(--kb-text-muted);text-transform:capitalize;}

/* Mobile menu */
.kb-mobile-menu{
  position:fixed;top:0;right:-100%;width:min(340px,85vw);height:100vh;background:var(--kb-card);
  z-index:1100;transition:right .35s cubic-bezier(.4,0,.2,1);overflow-y:auto;padding:90px 24px 24px;
  box-shadow:var(--kb-shadow-lg);
}
.kb-mobile-menu.kb-open{right:0;}
.kb-mobile-nav-menu{display:flex;flex-direction:column;gap:2px;}

/* Mobile accordion: Notes -> Class -> Subject (Biology, Chemistry, Physics,
   Mathematics, English, Urdu, Tarjama tul Quran, Computer, ...) */
.kb-mobile-row{display:flex;align-items:stretch;border-bottom:1px solid var(--kb-border);}
.kb-mobile-link{flex:1;display:block;padding:14px 10px;font-weight:500;color:var(--kb-text);}
.kb-mobile-expand{
  width:44px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  color:var(--kb-text-muted);transition:transform .25s ease;
}
.kb-mobile-has-children.kb-mobile-open > .kb-mobile-row > .kb-mobile-expand{transform:rotate(180deg);color:var(--kb-primary);}

.kb-mobile-sub{
  max-height:0;overflow:hidden;transition:max-height .3s ease;
  background:var(--kb-bg);border-radius:var(--kb-radius-sm);
}
.kb-mobile-has-children.kb-mobile-open > .kb-mobile-sub{max-height:2000px;}

/* Level 0 — top-level (e.g. "Notes") */
.kb-mobile-lvl-0 > .kb-mobile-row > .kb-mobile-link{font-family:var(--font-heading);font-weight:700;color:var(--kb-text);}

/* Level 1 — Class groups (e.g. "9th Class", "10th Class") */
.kb-mobile-lvl-1 > .kb-mobile-row{padding-left:14px;border-left:3px solid var(--kb-secondary);}
.kb-mobile-lvl-1 > .kb-mobile-row > .kb-mobile-link{font-weight:600;color:var(--kb-secondary);}

/* Level 2 — Subjects (Biology, Chemistry, Physics, Mathematics, English,
   Urdu, Tarjama tul Quran, Computer) */
.kb-mobile-lvl-2 > .kb-mobile-row{padding-left:28px;border-left:3px solid var(--kb-accent);}
.kb-mobile-lvl-2 > .kb-mobile-row > .kb-mobile-link{font-weight:500;font-size:.92rem;color:var(--kb-text-muted);}
.kb-mobile-lvl-2 > .kb-mobile-row > .kb-mobile-link:hover{color:var(--kb-accent);}
.kb-mobile-lvl-2:last-child > .kb-mobile-row{border-bottom:none;}
.kb-mobile-auth{display:flex;flex-direction:column;gap:10px;margin-top:20px;}
.kb-mobile-overlay{
  position:fixed;inset:0;background:rgba(15,23,42,.5);z-index:1050;opacity:0;visibility:hidden;
  transition:var(--kb-transition);backdrop-filter:blur(2px);
}
.kb-mobile-overlay.kb-open{opacity:1;visibility:visible;}

@media (max-width:1024px){
  .kb-primary-nav{display:none;}
  .kb-show-mobile{display:flex;}
  .kb-hide-mobile{display:none;}
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.kb-hero{position:relative;padding:70px 0 40px;overflow:hidden;}
.kb-hero-bg{position:absolute;inset:0;z-index:0;overflow:hidden;}
.kb-shape{position:absolute;border-radius:50%;filter:blur(60px);opacity:.35;animation:kbFloat 10s ease-in-out infinite;}
.kb-shape-1{width:340px;height:340px;background:var(--kb-primary);top:-100px;left:-80px;}
.kb-shape-2{width:280px;height:280px;background:var(--kb-purple);top:100px;right:-60px;animation-delay:-3s;}
.kb-shape-3{width:220px;height:220px;background:var(--kb-accent);bottom:-60px;left:30%;animation-delay:-6s;}
.kb-shape-4{width:180px;height:180px;background:var(--kb-secondary);bottom:40px;right:20%;animation-delay:-1.5s;}

@keyframes kbFloat{
  0%,100%{transform:translate(0,0) scale(1);}
  50%{transform:translate(20px,-30px) scale(1.08);}
}

.kb-hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center;padding-bottom:50px;}
.kb-eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;
  background:rgba(37,99,235,.1);color:var(--kb-primary);font-weight:600;font-size:.82rem;margin-bottom:20px;
}
.kb-hero-heading{font-size:clamp(2rem,4.5vw,3.4rem);margin-bottom:18px;letter-spacing:-.02em;}
.kb-hero-sub{font-size:1.1rem;max-width:520px;margin-bottom:30px;}

.kb-hero-search{
  display:flex;align-items:center;gap:12px;background:var(--kb-card);border-radius:999px;
  padding:8px 8px 8px 24px;box-shadow:var(--kb-shadow);max-width:560px;margin-bottom:26px;border:1px solid var(--kb-border);
}
.kb-hero-search i{color:var(--kb-text-muted);font-size:1.2rem;}
.kb-hero-search input{flex:1;border:none;background:transparent;font-size:1rem;color:var(--kb-text);font-family:var(--font-body);}
.kb-hero-search input:focus{outline:none;}

.kb-hero-quick-links{display:flex;flex-wrap:wrap;gap:10px;}

.kb-hero-visual{position:relative;height:420px;}
.kb-hero-orb{
  position:absolute;inset:10%;border-radius:50%;background:var(--kb-gradient);opacity:.18;filter:blur(30px);
  animation:kbPulse 4s ease-in-out infinite;
}
@keyframes kbPulse{0%,100%{transform:scale(1);}50%{transform:scale(1.1);}}
.kb-floating-card{
  position:absolute;display:flex;align-items:center;gap:10px;padding:14px 20px;border-radius:16px;
  background:var(--kb-card);box-shadow:var(--kb-shadow-lg);font-weight:600;font-size:.9rem;
  animation:kbFloatCard 6s ease-in-out infinite;border:1px solid var(--kb-border);
}
.kb-floating-card i{font-size:1.4rem;color:var(--kb-primary);}
.kb-fc-1{top:8%;left:0;animation-delay:0s;}
.kb-fc-2{top:45%;right:0;animation-delay:-2s;}
.kb-fc-2 i{color:var(--kb-accent);}
.kb-fc-3{bottom:6%;left:12%;animation-delay:-4s;}
.kb-fc-3 i{color:var(--kb-warning);}
@keyframes kbFloatCard{0%,100%{transform:translateY(0);}50%{transform:translateY(-16px);}}

.kb-stats-grid{
  position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  background:var(--kb-card);border-radius:var(--kb-radius-lg);padding:36px 20px;box-shadow:var(--kb-shadow);
  border:1px solid var(--kb-border);
}
.kb-stat-card{text-align:center;}
.kb-stat-number{display:block;font-family:var(--font-heading);font-weight:800;font-size:2.2rem;background:var(--kb-gradient);-webkit-background-clip:text;background-clip:text;color:transparent;}
.kb-stat-label{color:var(--kb-text-muted);font-weight:500;font-size:.9rem;}

/* ==========================================================================
   Sections / Grids
   ========================================================================== */
.kb-section{padding:64px 0;}
.kb-section-alt{background:var(--kb-card);}
.kb-section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px;flex-wrap:wrap;gap:14px;}
.kb-section-head-center{flex-direction:column;text-align:center;}
.kb-section-title{font-size:1.7rem;display:flex;align-items:center;gap:10px;margin:0;}
.kb-section-title i{color:var(--kb-primary);}
.kb-view-all{font-weight:600;color:var(--kb-primary);display:flex;align-items:center;gap:6px;transition:var(--kb-transition);}
.kb-view-all:hover{gap:10px;}

.kb-grid{display:grid;gap:24px;}
.kb-grid-2{grid-template-columns:repeat(2,1fr);}
.kb-grid-3{grid-template-columns:repeat(3,1fr);}
.kb-grid-4{grid-template-columns:repeat(4,1fr);}

/* ---------- Cards ---------- */
.kb-card{
  background:var(--kb-card);border-radius:var(--kb-radius);overflow:hidden;border:1px solid var(--kb-border);
  transition:var(--kb-transition);box-shadow:var(--kb-shadow-sm);display:flex;flex-direction:column;
}
.kb-card:hover{transform:translateY(-6px);box-shadow:var(--kb-shadow-lg);border-color:transparent;}
.kb-card-thumb{position:relative;display:block;aspect-ratio:16/10;overflow:hidden;background:var(--kb-bg);}
.kb-card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.kb-card:hover .kb-card-thumb img{transform:scale(1.08);}
.kb-card-thumb-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:2.6rem;color:var(--kb-border);}
.kb-badge{
  position:absolute;top:12px;left:12px;padding:5px 12px;border-radius:999px;font-size:.72rem;font-weight:700;
  color:#fff;backdrop-filter:blur(6px);
}
.kb-badge-primary{background:rgba(37,99,235,.9);}
.kb-badge-accent{background:rgba(16,185,129,.9);}
.kb-badge-danger{background:rgba(239,68,68,.9);position:static;display:inline-flex;align-items:center;gap:4px;}
.kb-card-body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.kb-card-tag{font-size:.75rem;font-weight:700;color:var(--kb-primary);text-transform:uppercase;letter-spacing:.03em;}
.kb-card-title{font-size:1.05rem;margin:0;}
.kb-card-title a{transition:color .2s;}
.kb-card-title a:hover{color:var(--kb-primary);}
.kb-card-title-lg{font-size:1.5rem;}
.kb-card-excerpt{font-size:.88rem;margin:0;}
.kb-card-meta{display:flex;flex-wrap:wrap;gap:14px;font-size:.78rem;color:var(--kb-text-muted);margin:4px 0;}
.kb-card-meta i{margin-right:3px;}
.kb-card-actions{display:flex;gap:10px;margin-top:auto;}
.kb-card-actions .kb-btn{flex:1;}
.kb-card-job-head{display:flex;justify-content:space-between;align-items:center;padding:18px 20px 0;}
.kb-card-job{padding-bottom:20px;}
.kb-card-job .kb-card-title{padding:0 20px;margin-top:12px;}
.kb-card-org,.kb-card-qualification{padding:0 20px;font-size:.85rem;margin:0;display:flex;align-items:center;gap:6px;}
.kb-card-job .kb-card-actions{padding:14px 20px 0;}
.kb-card-deadline{font-size:.82rem;color:var(--kb-danger);font-weight:600;}
.kb-card-featured{grid-column:1/-1;display:grid;grid-template-columns:1.1fr .9fr;margin-bottom:24px;}
.kb-card-featured .kb-card-thumb{aspect-ratio:auto;height:100%;}

.kb-class-card{
  background:var(--kb-card);border-radius:var(--kb-radius);padding:28px 22px;text-align:center;
  border:1px solid var(--kb-border);transition:var(--kb-transition);box-shadow:var(--kb-shadow-sm);
}
.kb-class-card:hover{transform:translateY(-6px);box-shadow:var(--kb-shadow-lg);}
.kb-class-icon{
  width:64px;height:64px;border-radius:18px;background:var(--kb-gradient);display:flex;align-items:center;
  justify-content:center;margin:0 auto 16px;font-size:1.7rem;color:#fff;
}
.kb-class-card h3{margin-bottom:4px;}
.kb-class-card p{font-size:.85rem;margin-bottom:14px;}
.kb-class-cta{color:var(--kb-primary);font-weight:600;font-size:.85rem;display:inline-flex;align-items:center;gap:6px;}

/* Class card as an accordion trigger + subject sub-list -------------- */
.kb-class-card-expandable{padding:0;overflow:hidden;}
.kb-class-card-toggle{
  width:100%;background:none;border:0;padding:28px 22px;font:inherit;color:inherit;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;text-align:center;
}
.kb-class-cta-caret{transition:transform .25s ease;}
.kb-class-card-toggle[aria-expanded="true"] .kb-class-cta-caret{transform:rotate(180deg);}
.kb-class-card-toggle[aria-expanded="true"] .kb-class-cta{color:var(--kb-accent);}

.kb-class-subject-list{
  list-style:none;margin:0;padding:4px 16px 20px;display:grid;grid-template-columns:1fr 1fr;gap:8px;
}
.kb-class-subject-list[hidden]{display:none;}
.kb-subject-pill{
  --kb-subject-color:var(--kb-primary);
  display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:var(--kb-radius-sm);
  font-size:.82rem;font-weight:600;text-decoration:none;color:var(--kb-subject-color);
  background:color-mix(in srgb, var(--kb-subject-color) 12%, transparent);
  border:1px solid color-mix(in srgb, var(--kb-subject-color) 30%, transparent);
  transition:var(--kb-transition);
}
.kb-subject-pill i{font-size:1.1rem;flex-shrink:0;}
.kb-subject-pill:hover,.kb-subject-pill:focus-visible{
  background:var(--kb-subject-color);color:#fff;transform:translateY(-2px);box-shadow:var(--kb-shadow-sm);
}
[data-theme="dark"] .kb-subject-pill{background:color-mix(in srgb, var(--kb-subject-color) 22%, transparent);}

/* FAQ */
.kb-faq-list{display:flex;flex-direction:column;gap:12px;}
.kb-faq-item{background:var(--kb-card);border:1px solid var(--kb-border);border-radius:var(--kb-radius-sm);overflow:hidden;}
.kb-faq-question{width:100%;text-align:left;padding:18px 20px;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-family:var(--font-heading);}
.kb-faq-question i{transition:transform .3s;color:var(--kb-primary);}
.kb-faq-item.kb-open .kb-faq-question i{transform:rotate(45deg);}
.kb-faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 20px;}
.kb-faq-item.kb-open .kb-faq-answer{max-height:200px;padding-bottom:18px;}

/* Newsletter CTA */
.kb-newsletter-cta{background:var(--kb-gradient);padding:60px 0;text-align:center;color:#fff;}
.kb-newsletter-cta h2{color:#fff;}
.kb-newsletter-cta p{color:rgba(255,255,255,.85);margin-bottom:24px;}
.kb-newsletter-form{display:flex;gap:10px;max-width:440px;margin:0 auto;}
.kb-newsletter-form input{flex:1;padding:14px 18px;border-radius:999px;border:none;font-family:var(--font-body);}
.kb-newsletter-form input:focus{outline:2px solid #fff;}
.kb-newsletter-form-lg input{padding:16px 22px;}

/* ---------- Floating buttons ---------- */
.kb-floating-buttons{position:fixed;bottom:26px;right:26px;display:flex;flex-direction:column;gap:12px;z-index:900;}
.kb-float-btn{
  width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:1.4rem;color:#fff;box-shadow:var(--kb-shadow-lg);transition:var(--kb-transition);
}
.kb-float-btn:hover{transform:scale(1.1);}
.kb-float-whatsapp{background:#25D366;}
.kb-float-telegram{background:#229ED9;}
.kb-float-top{background:var(--kb-text);opacity:0;visibility:hidden;transform:translateY(10px);}
.kb-float-top.kb-visible{opacity:1;visibility:visible;transform:translateY(0);}

/* ==========================================================================
   Footer
   ========================================================================== */
.kb-footer{background:var(--kb-text);color:#CBD5E1;margin-top:40px;}
[data-theme="dark"] .kb-footer{background:#020617;}
.kb-footer-top{padding:60px 0 40px;}
.kb-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.kb-footer-logo{font-size:1.4rem;display:inline-block;margin-bottom:14px;}
.kb-footer-col p{color:#94A3B8;font-size:.9rem;}
.kb-footer-title{color:#fff;font-size:1rem;margin-bottom:18px;}
.kb-footer-links{display:flex;flex-direction:column;gap:10px;}
.kb-footer-links a{color:#94A3B8;font-size:.9rem;transition:color .2s;}
.kb-footer-links a:hover{color:#fff;}
.kb-social-icons{display:flex;gap:10px;margin-top:16px;}
.kb-social-icons a{
  width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.08);display:flex;
  align-items:center;justify-content:center;transition:var(--kb-transition);
}
.kb-social-icons a:hover{background:var(--kb-primary);transform:translateY(-3px);}
.kb-footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;}
.kb-footer-bottom-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;font-size:.85rem;}
.kb-footer-legal{display:flex;gap:20px;}
.kb-footer-legal a:hover{color:#fff;}

/* ==========================================================================
   Page Layout / Breadcrumbs / Archive header
   ========================================================================== */
.kb-page-wrap{padding:36px 0 70px;}
.kb-breadcrumbs{margin-bottom:20px;}
.kb-breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.85rem;color:var(--kb-text-muted);}
.kb-breadcrumb-sep{font-size:.7rem;}
.kb-breadcrumbs a{color:var(--kb-text-muted);}
.kb-breadcrumbs a:hover{color:var(--kb-primary);}

.kb-archive-header{background:var(--kb-card);border-bottom:1px solid var(--kb-border);padding:28px 0;margin-bottom:8px;}
.kb-archive-title{font-size:1.8rem;margin:8px 0 0;}
.kb-archive-title span{color:var(--kb-primary);}
.kb-archive-desc{color:var(--kb-text-muted);margin-top:8px;}

.kb-content-layout{display:grid;grid-template-columns:1fr 320px;gap:36px;align-items:start;}
.kb-content-main-full{grid-column:1/-1;}

.kb-filters-bar{margin-bottom:26px;}
.kb-filters-form{display:flex;gap:12px;flex-wrap:wrap;}
.kb-filter-select{
  padding:11px 16px;border-radius:999px;border:1px solid var(--kb-border);background:var(--kb-card);
  color:var(--kb-text);font-family:var(--font-body);font-size:.88rem;
}

.kb-empty-state{text-align:center;padding:60px 20px;color:var(--kb-text-muted);}
.kb-empty-state i{font-size:3rem;display:block;margin-bottom:14px;color:var(--kb-border);}

.kb-pagination{display:flex;justify-content:center;gap:8px;margin-top:36px;}
.kb-pagination .page-numbers{
  width:42px;height:42px;display:flex;align-items:center;justify-content:center;border-radius:50%;
  background:var(--kb-card);border:1px solid var(--kb-border);font-weight:600;transition:var(--kb-transition);
}
.kb-pagination .page-numbers.current,.kb-pagination .page-numbers:hover{background:var(--kb-primary);color:#fff;border-color:var(--kb-primary);}

/* ---------- Single pages ---------- */
.kb-single-title{font-size:2rem;margin-bottom:12px;}
.kb-single-head{margin-bottom:20px;}
.kb-single-thumb{border-radius:var(--kb-radius);overflow:hidden;margin-bottom:24px;}
.kb-single-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:28px;padding:18px;background:var(--kb-card);border-radius:var(--kb-radius);border:1px solid var(--kb-border);}
.kb-share-buttons{display:flex;gap:8px;margin-left:auto;}
.kb-share-buttons a{width:38px;height:38px;border-radius:50%;background:var(--kb-bg);display:flex;align-items:center;justify-content:center;transition:var(--kb-transition);}
.kb-share-buttons a:hover{background:var(--kb-primary);color:#fff;}
.kb-single-content{font-size:1rem;line-height:1.8;}
.kb-single-content h2,.kb-single-content h3{margin-top:1.4em;}
.kb-single-content img{border-radius:var(--kb-radius-sm);}
.kb-single-content table{width:100%;border-collapse:collapse;margin:1.5em 0;}
.kb-single-content table td,.kb-single-content table th{border:1px solid var(--kb-border);padding:10px;}
.kb-report-link{margin-top:20px;font-size:.85rem;}
.kb-report-link a{color:var(--kb-danger);display:inline-flex;align-items:center;gap:6px;}
.kb-related-section{margin-top:50px;}
.kb-details-table{width:100%;border-collapse:collapse;margin:20px 0;background:var(--kb-card);border-radius:var(--kb-radius-sm);overflow:hidden;border:1px solid var(--kb-border);}
.kb-details-table th,.kb-details-table td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--kb-border);}
.kb-details-table th{width:180px;color:var(--kb-text-muted);font-weight:600;}
.kb-tags{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:20px;}
.kb-tags a{padding:6px 14px;border-radius:999px;background:var(--kb-card);border:1px solid var(--kb-border);font-size:.82rem;}
.kb-page-links{margin-top:20px;font-weight:600;}

/* ---------- Sidebar ---------- */
.kb-sidebar{display:flex;flex-direction:column;gap:24px;}
.kb-widget{background:var(--kb-card);border:1px solid var(--kb-border);border-radius:var(--kb-radius);padding:22px;}
.kb-widget-title{font-size:1.05rem;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--kb-border);}
.kb-sidebar-list{display:flex;flex-direction:column;gap:14px;}
.kb-sidebar-list li a{display:flex;gap:12px;align-items:center;}
.kb-sidebar-thumb{width:52px;height:52px;border-radius:10px;overflow:hidden;background:var(--kb-bg);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:1.3rem;color:var(--kb-border);}
.kb-sidebar-list-text{display:flex;flex-direction:column;gap:3px;}
.kb-sidebar-list-title{font-size:.9rem;font-weight:500;line-height:1.35;}
.kb-sidebar-list-meta{font-size:.76rem;color:var(--kb-text-muted);}
.kb-sidebar-tags{display:flex;flex-wrap:wrap;gap:8px;}
.kb-sidebar-tags a{padding:7px 14px;border-radius:999px;background:var(--kb-bg);font-size:.82rem;transition:var(--kb-transition);}
.kb-sidebar-tags a:hover{background:var(--kb-primary);color:#fff;}
.kb-ad{display:flex;align-items:center;justify-content:center;background:var(--kb-bg);border-radius:var(--kb-radius-sm);min-height:90px;color:var(--kb-text-muted);font-size:.8rem;border:1px dashed var(--kb-border);}
.kb-ad-header-wrap{margin:16px auto;}

/* ---------- Comments ---------- */
.kb-comments-section{margin-top:50px;}
.kb-comments-title{margin-bottom:22px;}
.kb-comment-list{display:flex;flex-direction:column;gap:20px;}
.comment-body{background:var(--kb-card);border:1px solid var(--kb-border);border-radius:var(--kb-radius-sm);padding:18px;}
.comment-author img{border-radius:50%;margin-right:10px;}
.kb-comment-form p{margin-bottom:14px;}
.kb-comment-form input[type="text"],.kb-comment-form input[type="email"],.kb-comment-form input[type="url"],.kb-comment-form textarea,.kb-input{
  width:100%;padding:12px 16px;border-radius:var(--kb-radius-sm);border:1px solid var(--kb-border);
  background:var(--kb-card);color:var(--kb-text);font-family:var(--font-body);
}
.kb-comment-form textarea{min-height:120px;resize:vertical;}

/* ---------- 404 ---------- */
.kb-404-wrap{display:flex;align-items:center;justify-content:center;min-height:60vh;text-align:center;padding:60px 24px;}
.kb-404-number{font-family:var(--font-heading);font-size:6rem;font-weight:800;background:var(--kb-gradient);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;}
.kb-404-content .kb-hero-search{margin:26px auto;}
.kb-404-content .kb-btn{margin-top:10px;}

/* ==========================================================================
   Animations (AOS-style fade-in on scroll)
   ========================================================================== */
[data-aos]{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease;}
[data-aos].kb-in-view{opacity:1;transform:translateY(0);}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width:1100px){
  .kb-hero-inner{grid-template-columns:1fr;}
  .kb-hero-visual{display:none;}
  .kb-content-layout{grid-template-columns:1fr;}
  .kb-sidebar{order:2;}
  .kb-footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:900px){
  .kb-grid-4{grid-template-columns:repeat(2,1fr);}
  .kb-grid-3{grid-template-columns:repeat(2,1fr);}
  .kb-stats-grid{grid-template-columns:repeat(2,1fr);}
  .kb-card-featured{grid-template-columns:1fr;}
}
@media (max-width:640px){
  .kb-grid-4,.kb-grid-3,.kb-grid-2{grid-template-columns:1fr;}
  .kb-footer-grid{grid-template-columns:1fr;}
  .kb-hero-heading{font-size:2rem;}
  .kb-container{padding:0 16px;}
  .kb-mega-columns{grid-template-columns:1fr;}
  .kb-share-buttons{margin-left:0;}
  .kb-single-actions{flex-direction:column;align-items:stretch;}
  .kb-class-card-toggle{padding:22px 16px;}
  .kb-class-subject-list{grid-template-columns:1fr;padding:4px 14px 18px;}
  .kb-filters-form{flex-direction:column;align-items:stretch;}
  .kb-filter-select{width:100%;}
}
@media (max-width:400px){
  .kb-class-subject-list{grid-template-columns:1fr;}
  .kb-subject-pill{font-size:.8rem;}
}

/* ==========================================================================
   Dark mode fine-tuning
   ========================================================================== */
[data-theme="dark"] .kb-chip{background:rgba(255,255,255,.05);}
[data-theme="dark"] .kb-hero-search,
[data-theme="dark"] .kb-filter-select,
[data-theme="dark"] .kb-input,
[data-theme="dark"] .kb-comment-form input,
[data-theme="dark"] .kb-comment-form textarea{background:var(--kb-card);color:var(--kb-text);}
[data-theme="dark"] .kb-badge-primary{background:rgba(37,99,235,.85);}