:root{
  /* Core Brand */
  --pb-primary:#0F172A;       /* Deep Navy - Trust */
  --pb-primary-600:#1E293B;   /* Slightly lighter navy for hover */
  --pb-primary-050:#F1F5F9;   /* Very light grey-blue for backgrounds */
  
  /* Accent & Highlights */
  --pb-accent:#FBBF24;        /* Warm Yellow - Highlights */
  --pb-accent-050:#FEF3C7;    /* Light yellow background */
  
  /* Status Colors */
  --pb-success:#10B981;       
  --pb-success-050:#E7F8F1;   
  --pb-warn:#F59E0B;          
  --pb-warn-050:#FEF4E2;      

  /* Text & Borders */
  --ink:#0F172A;              /* Deep Navy text */
  --ink-2:#1E293B;            
  --muted:#64748B;            
  --line:#E2E8F0;             /* Light border */

  /* Surfaces */
  --surface:#FFFFFF;          
  --bg:#F8FAFC;               /* Light grey-blue background */
  --bg-2:#F1F5F9;             
  
  /* Radii & Shadows */
  --r-sm:8px; --r:12px; --r-lg:16px; --r-xl:24px; --r-full:999px;
  --sh-1:0 1px 2px rgba(15,23,41,.04), 0 1px 3px rgba(15,23,41,.06);
  --sh-2:0 4px 12px rgba(15,23,41,.06), 0 2px 4px rgba(15,23,41,.04);
  --sh-3:0 12px 32px rgba(15,23,41,.10), 0 4px 8px rgba(15,23,41,.05);
  --sh-brand:0 8px 24px rgba(15,23,42,.20); /* Navy shadow */
  
  /* Typography & Layout */
  --f-sans:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --max:1200px; --nav-h:64px; --t:180ms cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--f-sans);color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased}
img,svg,video{max-width:100%;display:block}
a{color:var(--pb-primary);text-decoration:none}
a:hover{text-decoration:underline}
button{font:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0 0 .4em;letter-spacing:-.02em;line-height:1.2;color:var(--ink)}
h1{font-size:clamp(28px,4.5vw,44px);font-weight:800}
h2{font-size:clamp(22px,3vw,30px);font-weight:700}
h3{font-size:18px;font-weight:700}
h4{font-size:15px;font-weight:700}
p{margin:0 0 1em}
small,.small{font-size:13px}
.muted{color:var(--muted)}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
.section{padding:64px 0}
.section--alt{background:linear-gradient(180deg,#fff 0%,var(--bg-2) 100%)}
.section__head{text-align:center;margin-bottom:40px}
.section__head p{color:var(--muted);max-width:560px;margin:6px auto 0}
.section__title{font-size:22px;font-weight:700;margin:32px 0 16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:var(--r-full);border:1px solid transparent;font-weight:600;font-size:14.5px;line-height:1;transition:var(--t);text-decoration:none;white-space:nowrap}
.btn--primary{background:var(--pb-primary);color:#fff;box-shadow:var(--sh-brand)}
.btn--primary:hover{background:var(--pb-primary-600);color:#fff;text-decoration:none;transform:translateY(-1px)}
.btn--ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{background:var(--bg);text-decoration:none}
.btn--ghost.is-active{background:var(--pb-primary-050);color:var(--pb-primary);border-color:var(--pb-primary)}
.btn--sm{padding:8px 14px;font-size:13.5px}
.btn--lg{padding:14px 26px;font-size:16px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.icon-btn{width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:18px;color:var(--ink);transition:var(--t)}
.icon-btn:hover{background:var(--pb-primary-050);border-color:var(--pb-primary);color:var(--pb-primary)}
.icon-btn.is-on{background:var(--pb-warn-050);border-color:var(--pb-warn);color:var(--pb-warn)}
.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:var(--r-full);font-size:11.5px;font-weight:700;letter-spacing:.02em}
.badge--free{background:var(--pb-success-050);color:var(--pb-success)}
.badge--premium{background:var(--pb-accent-050);color:#C53B3B}
.badge--done{background:var(--pb-success-050);color:var(--pb-success)}
.badge--progress{background:var(--pb-primary-050);color:var(--pb-primary)}
.pill{display:inline-flex;padding:5px 12px;border-radius:var(--r-full);background:var(--pb-primary-050);color:var(--pb-primary);font-size:12.5px;font-weight:600;letter-spacing:.02em}
.nav{position:sticky;top:0;z-index:40;height:var(--nav-h);background:rgba(255,255,255,.85);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav__inner{max-width:var(--max);margin:0 auto;padding:0 20px;height:100%;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:18px;color:var(--ink);letter-spacing:-.02em}
.brand__mark{width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,var(--pb-primary),var(--pb-accent));display:grid;place-items:center;color:#fff;font-size:15px;font-weight:900}
.brand:hover{text-decoration:none}
.nav__links{display:flex;gap:4px;margin-left:8px}
.nav__link{padding:8px 14px;border-radius:var(--r-full);font-size:14.5px;font-weight:500;color:var(--ink-2);transition:var(--t)}
.nav__link:hover{background:var(--bg);text-decoration:none}
.nav__link.is-active{background:var(--pb-primary-050);color:var(--pb-primary)}
.nav__right{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav__search{display:flex;align-items:center;gap:8px;padding:8px 14px;border-radius:var(--r-full);background:var(--bg);border:1px solid var(--line);width:220px;color:var(--muted);font-size:14px;transition:var(--t)}
.nav__search:focus-within{border-color:var(--pb-primary);background:#fff;width:260px}
.nav__search input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--ink)}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--pb-primary-050);color:var(--pb-primary);display:grid;place-items:center;font-weight:700;font-size:14px}
.nav__burger{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;align-items:center;justify-content:center}
.bottom-nav{display:none;position:fixed;bottom:0;left:0;right:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-top:1px solid var(--line);padding:6px 8px calc(6px + env(safe-area-inset-bottom))}
.bottom-nav__item{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 4px;color:var(--muted);font-size:11px;font-weight:600;border-radius:var(--r)}
.bottom-nav__item svg{width:22px;height:22px}
.bottom-nav__item.is-active{color:var(--pb-primary);background:var(--pb-primary-050)}
.bottom-nav__item:hover{text-decoration:none;color:var(--pb-primary)}
.hero{position:relative;overflow:hidden;padding:80px 0 60px;background:radial-gradient(1200px 500px at 80% -10%, var(--pb-primary-050) 0%, transparent 60%),radial-gradient(800px 400px at 0% 20%, var(--pb-accent-050) 0%, transparent 55%),#fff}
.hero__inner{max-width:var(--max);margin:0 auto;padding:0 20px;text-align:center}
.hero__title{margin:18px 0 14px;font-size:clamp(34px,6vw,60px);font-weight:900;letter-spacing:-.03em}
.hero__sub{color:var(--muted);font-size:clamp(15px,1.6vw,18px);max-width:600px;margin:0 auto 28px}
.hero__cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.hero__stats{display:flex;justify-content:center;gap:48px;margin-top:56px;flex-wrap:wrap}
.hero__stats div{text-align:center}
.hero__stats strong{display:block;font-size:26px;font-weight:800;color:var(--ink)}
.hero__stats span{color:var(--muted);font-size:13px}
.class-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.class-card{position:relative;display:flex;flex-direction:column;gap:6px;padding:28px 24px 24px;border-radius:var(--r-xl);background:#fff;border:1px solid var(--line);box-shadow:var(--sh-1);transition:var(--t);color:var(--ink);overflow:hidden}
.class-card::before{content:"";position:absolute;inset:0 auto auto 0;width:100%;height:5px;background:var(--accent,var(--pb-primary))}
.class-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);text-decoration:none;border-color:transparent}
.class-card__no{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.class-card__num{font-size:56px;font-weight:900;letter-spacing:-.04em;color:var(--accent,var(--pb-primary));line-height:1}
.class-card__tag{color:var(--ink-2);font-weight:500;margin-top:6px}
.class-card__meta{color:var(--muted);font-size:13px;margin-top:auto;padding-top:18px}
.class-card__arrow{position:absolute;right:20px;bottom:20px;font-size:22px;color:var(--accent,var(--pb-primary));transition:var(--t)}
.class-card:hover .class-card__arrow{transform:translateX(4px)}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.feature{background:#fff;border-radius:var(--r-lg);padding:22px;border:1px solid var(--line);transition:var(--t)}
.feature:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:transparent}
.feature__icon{font-size:26px;display:inline-block;margin-bottom:8px}
.feature h3{margin-bottom:4px;font-size:16px}
.feature p{margin:0;color:var(--muted);font-size:14px}
.cta-band{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;padding:32px 36px;border-radius:var(--r-xl);background:linear-gradient(135deg,var(--pb-primary) 0%,#7C6EF0 100%);color:#fff;box-shadow:var(--sh-3)}
.cta-band h2{color:#fff;margin-bottom:4px}
.cta-band p{margin:0;color:rgba(255,255,255,.85)}
.cta-band .btn--primary{background:#fff;color:var(--pb-primary);box-shadow:none}
.cta-band .btn--primary:hover{background:#F2F0FF}
.page-head{padding:36px 0 28px;background:#fff;border-bottom:1px solid var(--line)}
.page-head--compact{padding:24px 0 20px}
.page-head h1{margin:10px 0 6px}
.chapter-no{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--pb-primary);background:var(--pb-primary-050);padding:3px 10px;border-radius:var(--r-full);margin-right:10px;vertical-align:middle;text-transform:uppercase}
.breadcrumb{color:var(--muted);font-size:13.5px;display:flex;gap:6px;flex-wrap:wrap}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--pb-primary)}
.subject-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.subject-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;color:var(--ink);display:flex;flex-direction:column;gap:6px;transition:var(--t)}
.subject-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);text-decoration:none}
.subject-card__icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-weight:800;font-size:20px;margin-bottom:6px}
.subject-card h3{font-size:16px;margin:0}
.subject-card p{margin:0;color:var(--muted);font-size:13px}
.subject-card__pct{font-size:12px;color:var(--muted);margin-top:4px}
.chapter-layout{display:grid;grid-template-columns:260px 1fr;gap:32px;padding-top:32px;padding-bottom:64px;align-items:start}
.chapter-nav{position:sticky;top:calc(var(--nav-h) + 20px);background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:18px}
.chapter-nav h3{font-size:13px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-bottom:12px}
.chapter-nav ol{list-style:none;margin:0;padding:0}
.chapter-nav li{margin-bottom:2px}
.chapter-nav a{display:flex;gap:10px;padding:8px 10px;border-radius:var(--r);color:var(--ink-2);font-size:13.5px;line-height:1.35;transition:var(--t)}
.chapter-nav a:hover{background:var(--bg);text-decoration:none}
.chapter-nav li.is-active a{background:var(--pb-primary-050);color:var(--pb-primary);font-weight:600}
.chapter-nav a span{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--bg);display:grid;place-items:center;font-size:11.5px;font-weight:700;color:var(--muted)}
.chapter-nav li.is-active a span{background:var(--pb-primary);color:#fff}
.resource-group{margin-bottom:36px}
.resource-group__head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.resource-group__head h2{font-size:18px;margin:0}
.resource-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.resource-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:18px;display:flex;flex-direction:column;gap:12px;transition:var(--t)}
.resource-card:hover{border-color:var(--pb-primary);box-shadow:var(--sh-2)}
.resource-card--mini{padding:14px;text-decoration:none;color:var(--ink)}
.resource-card--mini h4{margin:0;font-size:14px}
.resource-card__body h3{font-size:15px;margin-bottom:6px;line-height:1.35}
.resource-card__body p{color:var(--muted);font-size:13px;margin:0 0 10px}
.resource-card__badges{display:flex;gap:6px;flex-wrap:wrap}
.resource-card__foot{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:auto}
.progress{height:6px;background:var(--bg-2);border-radius:var(--r-full);overflow:hidden}
.progress__bar{height:100%;background:linear-gradient(90deg,var(--pb-primary),var(--pb-accent));border-radius:var(--r-full);transition:width .4s ease}
.viewer-head{padding:20px 0;background:#fff;border-bottom:1px solid var(--line)}
.viewer-head h1{font-size:22px;margin:8px 0 12px}
.viewer-head__actions{display:flex;gap:8px;flex-wrap:wrap}
.viewer-wrap{background:#1B1F2A;padding:20px;display:flex;flex-direction:column;gap:12px;align-items:center;min-height:70vh}
.viewer-toolbar{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);padding:6px;border-radius:var(--r-full);color:#fff;font-size:13px}
.viewer-toolbar button{background:transparent;border:0;color:#fff;width:32px;height:32px;border-radius:50%;display:grid;place-items:center}
.viewer-toolbar button:hover{background:rgba(255,255,255,.15)}
.viewer-progress{width:120px;height:4px;background:rgba(255,255,255,.15);border-radius:2px;overflow:hidden;margin-left:6px}
#progBar{height:100%;width:0;background:var(--pb-accent);transition:width .3s}
.pdf-viewer{background:#fff;box-shadow:0 20px 60px rgba(0,0,0,.4);max-width:min(900px,100%);max-height:78vh;overflow:auto;border-radius:6px}
.viewer-foot{padding:32px 20px 80px}
.prev-next{display:flex;justify-content:space-between;gap:12px;margin-bottom:32px;flex-wrap:wrap}
.paywall{text-align:center;padding:64px 20px;max-width:520px;margin:48px auto;background:#fff;border-radius:var(--r-xl);border:1px solid var(--line);box-shadow:var(--sh-2)}
.paywall h2{margin-bottom:8px}
.paywall p{color:var(--muted);margin-bottom:20px}
.auth-shell{min-height:100vh;display:grid;place-items:center;padding:32px 20px;background:radial-gradient(1000px 500px at 80% 0%, var(--pb-primary-050) 0%, transparent 55%),radial-gradient(800px 400px at 0% 30%, var(--pb-accent-050) 0%, transparent 60%),var(--bg)}
.auth-card{width:100%;max-width:440px;background:#fff;border-radius:var(--r-xl);padding:36px;box-shadow:var(--sh-3);border:1px solid var(--line)}
.auth-card__brand{display:flex;justify-content:center;margin-bottom:20px}
.auth-card h1{font-size:24px;text-align:center;margin-bottom:6px}
.auth-card__sub{text-align:center;color:var(--muted);font-size:14px;margin-bottom:26px}
.auth-card label{display:block;font-size:13.5px;font-weight:600;margin:14px 0 6px;color:var(--ink-2)}
.auth-card input,.auth-card select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r);font-size:14.5px;background:#fff;transition:var(--t)}
.auth-card input:focus,.auth-card select:focus{outline:0;border-color:var(--pb-primary);box-shadow:0 0 0 4px var(--pb-primary-050)}
.auth-card .btn{width:100%;margin-top:22px}
.auth-card__foot{text-align:center;margin-top:18px;font-size:13.5px;color:var(--muted)}
.auth-card__err{background:#FEF2F2;color:#B91C1C;border:1px solid #FECACA;padding:10px 14px;border-radius:var(--r);font-size:13.5px;margin-bottom:6px}
.auth-card__err ul{margin:0;padding-left:18px}
.dash-hero{background:linear-gradient(135deg,#fff 60%,var(--pb-primary-050) 100%);border-radius:var(--r-xl);padding:32px;margin-bottom:28px;border:1px solid var(--line)}
.dash-hero h1{font-size:clamp(22px,3vw,32px);margin-bottom:6px}
.dash-hero p{color:var(--muted);margin:0}
.dash-grid{display:grid;gap:20px;grid-template-columns:2fr 1fr;margin-bottom:28px}
.dash-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:22px}
.dash-card h3{font-size:14px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-bottom:14px}
.continue-card{display:flex;gap:20px;align-items:center;padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);flex-wrap:wrap}
.continue-card__art{width:70px;height:70px;border-radius:16px;background:var(--pb-primary-050);color:var(--pb-primary);display:grid;place-items:center;font-size:28px;font-weight:800;flex-shrink:0}
.continue-card__body{flex:1;min-width:200px}
.continue-card__body h4{margin:0;font-size:16px;line-height:1.3}
.continue-card__body p{margin:2px 0 10px;color:var(--muted);font-size:13px}
.streak{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;margin-top:10px}
.streak__d{aspect-ratio:1;border-radius:8px;background:var(--bg-2);display:grid;place-items:center;font-size:11px;color:var(--muted);font-weight:600}
.streak__d.is-on{background:var(--pb-success);color:#fff}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px}
.stat{background:var(--bg);border-radius:var(--r);padding:14px}
.stat strong{display:block;font-size:22px;font-weight:800;color:var(--ink)}
.stat span{font-size:12.5px;color:var(--muted)}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px}
.cat{padding:16px;border-radius:var(--r);background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;gap:6px;color:var(--ink);transition:var(--t)}
.cat:hover{border-color:var(--pb-primary);text-decoration:none;transform:translateY(-2px)}
.cat__icon{font-size:22px}
.cat h4{margin:0;font-size:14px}
.cat small{color:var(--muted)}
.admin-form{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;max-width:900px}
.admin-form label{display:block;font-size:13.5px;font-weight:600;margin:14px 0 6px;color:var(--ink-2)}
.admin-form input,.admin-form select,.admin-form textarea{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:var(--r);font-size:14.5px;font-family:inherit;background:#fff;transition:var(--t)}
.admin-form input:focus,.admin-form select:focus,.admin-form textarea:focus{outline:0;border-color:var(--pb-primary);box-shadow:0 0 0 4px var(--pb-primary-050)}
.admin-form .check{display:flex;align-items:center;gap:8px;font-weight:600;margin-top:14px}
.admin-form .check input{width:auto}
.admin-form .btn{margin-top:22px}
.grid{display:grid;gap:16px}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line)}
.table th,.table td{padding:12px 14px;text-align:left;font-size:13.5px;border-bottom:1px solid var(--line)}
.table th{background:var(--bg);font-weight:700;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.05em}
.table tr:last-child td{border-bottom:0}
.table tr:hover td{background:var(--bg)}
.empty{text-align:center;padding:48px 20px;color:var(--muted);background:#fff;border:1px dashed var(--line);border-radius:var(--r-lg)}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:12px 20px;border-radius:var(--r-full);font-size:14px;font-weight:500;box-shadow:var(--sh-3);opacity:0;pointer-events:none;transition:var(--t);z-index:100}
.toast.is-on{opacity:1;transform:translateX(-50%) translateY(0)}
.footer{background:#0B1020;color:#B7BECF;padding:48px 0 24px;margin-top:64px}
.footer a{color:#B7BECF}
.footer a:hover{color:#fff}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;max-width:var(--max);margin:0 auto;padding:0 20px}
.footer h4{color:#fff;font-size:14px;margin-bottom:14px}
.footer ul{list-style:none;padding:0;margin:0}
.footer li{margin-bottom:8px;font-size:14px}
.footer__bottom{border-top:1px solid #1E2538;margin-top:32px;padding-top:20px;max-width:var(--max);margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px;display:flex;justify-content:space-between;font-size:13px;color:#6B7280;flex-wrap:wrap;gap:8px}
@media (max-width:960px){
  .chapter-layout{grid-template-columns:1fr}
  .chapter-nav{position:static}
  .dash-grid{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .section{padding:44px 0}
  .nav__links{display:none}
  .nav__search{display:none}
  .nav__burger{display:flex}
  .bottom-nav{display:flex}
  body{padding-bottom:72px}
  .footer{margin-bottom:72px}
  .footer__grid{grid-template-columns:1fr 1fr}
  .hero{padding:48px 0 40px}
  .hero__stats{gap:28px}
  .cta-band{padding:24px;flex-direction:column;align-items:flex-start}
  .class-card__num{font-size:44px}
  .dash-hero{padding:22px}
}
.nav__drawer{position:fixed;top:var(--nav-h);left:0;right:0;bottom:0;z-index:39;background:rgba(15,23,41,.4);display:none}
.nav__drawer.is-open{display:block}
.nav__drawer-inner{background:#fff;padding:16px;max-height:80%;overflow:auto;border-bottom:1px solid var(--line);border-radius:0 0 20px 20px}
.nav__drawer a{display:block;padding:12px 14px;border-radius:var(--r);color:var(--ink);font-weight:500}
.nav__drawer a:hover{background:var(--bg);text-decoration:none}

/* ═══════════════════════════════════════════════════════════
   NEW HERO + VALUE CARDS + ADVANTAGE GRID
   ═══════════════════════════════════════════════════════════ */
.hero--new{position:relative;overflow:hidden;padding:64px 0 80px;background:radial-gradient(1400px 600px at 90% -20%,#EEECFD 0%,transparent 55%),radial-gradient(900px 500px at 0% 40%,#FFEEEE 0%,transparent 55%),#fff}
.hero__split{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:center;position:relative;z-index:2}
.hero__left{max-width:620px}
.hero--new .hero__title{font-size:clamp(40px,6vw,76px);font-weight:900;letter-spacing:-.035em;line-height:1.02;margin:20px 0;background:linear-gradient(135deg,var(--ink) 0%,var(--ink) 60%,var(--pb-primary) 130%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero--new .hero__sub{font-size:clamp(15px,1.5vw,18px);color:var(--muted);max-width:540px;margin:0 0 28px;line-height:1.6}
.hero--new .hero__cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:44px}
.hero--new .hero__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-top:24px;border-top:1px solid var(--line);margin-top:0}
.hero--new .hero__stats strong{display:block;font-size:22px;font-weight:800;color:var(--ink);letter-spacing:-.02em}
.hero--new .hero__stats span{color:var(--muted);font-size:12.5px}
.hero__right{position:relative;z-index:2}
.hero__video{position:relative;aspect-ratio:4/3;border-radius:28px;overflow:hidden;box-shadow:0 30px 80px rgba(91,75,224,.22),0 8px 20px rgba(15,23,41,.08);border:4px solid #fff;background:linear-gradient(135deg,var(--pb-primary) 0%,var(--pb-accent) 100%)}
.hero__video-poster{position:absolute;inset:0;background-size:cover;background-position:center;display:grid;place-items:center;cursor:pointer;background-color:var(--pb-primary)}
.hero__video-poster::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,41,.1),rgba(15,23,41,.35))}
.hero__video-play{position:relative;z-index:2;width:84px;height:84px;border-radius:50%;background:rgba(255,255,255,.95);display:grid;place-items:center;font-size:26px;color:var(--pb-primary);box-shadow:0 20px 40px rgba(0,0,0,.25);animation:pb-pulse 2.4s ease-in-out infinite;padding-left:6px}
@keyframes pb-pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}
.hero__video-embed{position:absolute;inset:0}
.hero__video-embed iframe,.hero__video-embed video{width:100%;height:100%;border:0}
.hero__visual{position:relative;aspect-ratio:1/1;max-width:460px;margin-left:auto}
.hero__visual-img{position:absolute;border-radius:24px;background-size:cover;background-position:center;box-shadow:0 24px 60px rgba(15,23,41,.15);border:6px solid #fff}
.hero__visual-img--a{inset:0 30% 30% 0;transform:rotate(-3deg)}
.hero__visual-img--b{inset:25% 0 0 35%;transform:rotate(3deg)}
.hero__visual-blob{position:absolute;border-radius:50%;filter:blur(40px);opacity:.55}
.hero__visual-blob--a{inset:5% 15% 55% 5%;background:var(--pb-primary)}
.hero__visual-blob--b{inset:45% 50% 10% 15%;background:var(--pb-accent)}
.hero__visual-blob--c{inset:55% 5% 5% 55%;background:#74B9FF}
.hero__visual-emoji{position:absolute;font-size:42px;filter:drop-shadow(0 6px 14px rgba(15,23,41,.2));animation:pb-float 6s ease-in-out infinite}
.hero__visual-emoji--1{top:8%;left:12%}
.hero__visual-emoji--2{top:22%;right:18%;animation-delay:.6s}
.hero__visual-emoji--3{top:48%;left:8%;animation-delay:1.2s;font-size:52px;color:var(--pb-primary);font-weight:900}
.hero__visual-emoji--4{bottom:22%;right:12%;animation-delay:1.8s}
.hero__visual-emoji--5{bottom:8%;left:42%;animation-delay:2.4s}
@keyframes pb-float{0%,100%{transform:translateY(0) rotate(-4deg)}50%{transform:translateY(-14px) rotate(4deg)}}
.hero__bg{position:absolute;inset:0;z-index:1;pointer-events:none;overflow:hidden}
.hero__bg-blob{position:absolute;border-radius:50%;filter:blur(80px);opacity:.35}
.hero__bg-blob--1{width:400px;height:400px;top:-100px;right:10%;background:#A29BFE}
.hero__bg-blob--2{width:300px;height:300px;bottom:-80px;left:5%;background:#FAB1A0}
.hero__bg-blob--3{width:250px;height:250px;top:40%;right:-60px;background:#74B9FF;opacity:.25}
.section__head h2 em{font-style:normal;color:var(--pb-primary);background:linear-gradient(135deg,var(--pb-primary),var(--pb-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.cards-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.value-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px 26px;transition:var(--t);position:relative;overflow:hidden}
.value-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--pb-primary),var(--pb-accent));transform:scaleX(0);transform-origin:left;transition:transform .35s ease}
.value-card:hover{transform:translateY(-4px);box-shadow:0 20px 40px rgba(15,23,41,.08);border-color:transparent}
.value-card:hover::before{transform:scaleX(1)}
.value-card__icon{width:56px;height:56px;border-radius:16px;background:var(--pb-primary-050);display:grid;place-items:center;font-size:26px;margin-bottom:18px}
.value-card h3{font-size:19px;font-weight:700;margin:0 0 8px;letter-spacing:-.01em}
.value-card p{color:var(--muted);font-size:14.5px;margin:0;line-height:1.55}
.advantage-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px}
.advantage-card{background:#fff;border-radius:24px;padding:26px;border:1px solid var(--line);transition:var(--t);text-align:left}
.advantage-card:hover{transform:translateY(-4px);box-shadow:0 24px 48px rgba(15,23,41,.1);border-color:transparent}
.advantage-card__img{aspect-ratio:16/10;border-radius:16px;background-size:cover;background-position:center;margin-bottom:20px}
.advantage-card__icon{width:72px;height:72px;border-radius:20px;background:linear-gradient(135deg,var(--pb-primary-050),var(--pb-accent-050));display:grid;place-items:center;font-size:34px;margin-bottom:20px}
.advantage-card h3{font-size:20px;font-weight:800;margin:0 0 8px;letter-spacing:-.015em}
.advantage-card p{color:var(--muted);font-size:15px;margin:0;line-height:1.55}
@media(max-width:960px){.hero__split{grid-template-columns:1fr;gap:40px}.hero__right{max-width:520px;margin:0 auto;width:100%}.hero__visual{margin:0 auto}.hero--new .hero__stats{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.hero--new{padding:40px 0 56px}.hero--new .hero__title{font-size:clamp(36px,9vw,52px)}.hero--new .hero__cta{flex-direction:column;align-items:stretch}.hero--new .hero__cta .btn{width:100%}.hero__visual-emoji{font-size:32px}.hero__visual-emoji--3{font-size:40px}.cards-3,.advantage-grid{grid-template-columns:1fr}}


/* NEW HERO + VALUE + ADVANTAGE */
.hero__left{max-width:620px}
.hero--new .hero__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-top:24px;border-top:1px solid var(--line)}
.hero--new .hero__stats strong{display:block;font-size:22px;font-weight:800;color:var(--ink)}
.hero__right{position:relative;z-index:2}
.hero__video-play{position:relative;z-index:2;width:84px;height:84px;border-radius:50%;background:rgba(255,255,255,.95);display:grid;place-items:center;font-size:26px;color:var(--pb-primary);animation:pb-pulse 2.4s ease-in-out infinite;padding-left:6px}
.hero__video-embed{position:absolute;inset:0}
.hero__visual-emoji--1{top:8%;left:12%}
.value-card:hover::before{transform:scaleX(1)}
.value-card h3{font-size:19px;font-weight:700;margin:0 0 8px}
.advantage-card{background:#fff;border-radius:24px;padding:26px;border:1px solid var(--line);transition:var(--t)}
.advantage-card h3{font-size:20px;font-weight:800;margin:0 0 8px}
@media(max-width:640px){.hero--new{padding:40px 0 56px}.hero--new .hero__title{font-size:clamp(36px,9vw,52px)}.hero--new .hero__cta{flex-direction:column}.hero--new .hero__cta .btn{width:100%}.hero__visual-emoji{font-size:32px}.hero__visual-emoji--3{font-size:40px}.cards-3,.advantage-grid{grid-template-columns:1fr}}

/* ═══════════════════════════════════════════════════════════
   GEN-Z HERO UPGRADE — countdown, stickers, trust ribbon, ticker

/* Countdown pill */
.countdown-pill{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 16px;border-radius:999px;
  background:#fff;border:1px solid var(--line);
  box-shadow:0 4px 12px rgba(15,23,41,.06);
  font-size:13.5px;font-weight:600;color:var(--ink);
  margin-bottom:20px;
}
.countdown-pill__dot{
  width:8px;height:8px;border-radius:50%;background:#EF4444;
  box-shadow:0 0 0 0 rgba(239,68,68,.7);
  animation:pb-live 1.6s ease-out infinite;
}
@keyframes pb-live{
  0%{box-shadow:0 0 0 0 rgba(239,68,68,.7)}
  100%{box-shadow:0 0 0 10px rgba(239,68,68,0)}
}
.countdown-pill__label{color:var(--muted)}
.countdown-pill__time{
  font-variant-numeric:tabular-nums;
  color:var(--pb-primary);font-weight:800;
  letter-spacing:-.01em;
}

/* Big colored headline */
.hero__title--genz{
  font-size:clamp(48px,8vw,104px);
  font-weight:900;
  letter-spacing:-.045em;
  line-height:.92;
  margin:8px 0 20px;
}
.hero__title--genz .word{
  display:inline-block;
  -webkit-background-clip:text;
  background-clip:text;
}
.hero__title--genz .word--purple{
  background:linear-gradient(135deg,#5B4BE0,#8B7CFF);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:transparent;
}
.hero__title--genz .word--ink{
  color:var(--ink);
  -webkit-text-fill-color:var(--ink);
}
.hero__title--genz .word--coral{
  background:linear-gradient(135deg,#FF6B6B,#FF9F68);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:transparent;
}

/* Sub-headline */
.hero__sub--genz{
  font-size:clamp(15px,1.5vw,17px);
  line-height:1.55;
}

/* Trust ribbon */
.trust-ribbon{
  display:flex;flex-wrap:wrap;gap:14px 24px;
  margin-top:26px;padding-top:22px;
  border-top:1px dashed var(--line);
  font-size:13.5px;font-weight:600;color:var(--ink-2);
}
.trust-ribbon span{white-space:nowrap}

/* Floating sticker chips */
.hero__stickers{
  position:absolute;inset:0;pointer-events:none;z-index:3;
}
.sticker{
  position:absolute;
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;border-radius:999px;
  font-size:12.5px;font-weight:800;letter-spacing:.02em;
  box-shadow:0 10px 24px rgba(15,23,41,.12);
  animation:pb-sticker-float 5s ease-in-out infinite;
}
.sticker--hot{top:12%;left:6%;background:linear-gradient(135deg,#FF6B6B,#FF8F6B);color:#fff;transform:rotate(-6deg);animation-delay:0s}
.sticker--free{top:70%;left:3%;background:#10B981;color:#fff;transform:rotate(5deg);animation-delay:1.2s}
.sticker--india{top:18%;right:8%;background:#fff;color:var(--ink);border:1px solid var(--line);transform:rotate(6deg);animation-delay:.6s}
.sticker--new{top:78%;right:12%;background:linear-gradient(135deg,var(--pb-primary),#8B7CFF);color:#fff;transform:rotate(-5deg);animation-delay:1.8s}
@keyframes pb-sticker-float{
  0%,100%{transform:translateY(0) rotate(var(--r,0deg))}
  50%{transform:translateY(-10px) rotate(var(--r,0deg))}
}

/* Live ticker */
.live-ticker{
  margin-top:12px;padding:10px 14px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  display:flex;align-items:center;gap:10px;
  box-shadow:0 4px 16px rgba(15,23,41,.05);
  overflow:hidden;
}
.live-ticker__dot{
  width:8px;height:8px;border-radius:50%;background:#EF4444;
  flex-shrink:0;
  box-shadow:0 0 0 0 rgba(239,68,68,.7);
  animation:pb-live 1.6s ease-out infinite;
}
.live-ticker__label{
  font-size:11px;font-weight:800;letter-spacing:.1em;
  color:#EF4444;flex-shrink:0;
}
.live-ticker__marquee{
  overflow:hidden;flex:1;min-width:0;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);
}
.live-ticker__track{
  display:inline-flex;gap:24px;white-space:nowrap;
  animation:pb-marquee 40s linear infinite;
}
.live-item{
  font-size:13px;color:var(--ink-2);
}
@keyframes pb-marquee{
  0%{transform:translateX(0)}
  100%{transform:translateX(-50%)}
}

/* Mobile tweaks */
@media (max-width:760px){
  .hero__title--genz{font-size:clamp(40px,11vw,64px)}
  .sticker{font-size:11.5px;padding:6px 12px}
  .sticker--hot{top:8%;left:4%}
  .sticker--free{top:auto;bottom:18%;left:4%}
  .sticker--india{top:8%;right:4%}
  .sticker--new{top:auto;bottom:14%;right:4%}
  .trust-ribbon{gap:10px 18px;font-size:12.5px}
  .live-ticker__track{animation-duration:30s}
}

/* Video size fix */
.hero__video{
  position:relative;
  width:100%;
  max-width:560px;
  aspect-ratio:4/3;
  border-radius:24px;
  overflow:hidden;
  background:#000;
  box-shadow:0 30px 80px rgba(91,75,224,.22);
  border:4px solid #fff;
  margin-left:auto;
}
.hero__video video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
@media (max-width:960px){
  .hero__video{max-width:100%;margin:0 auto}
}

/* ── HARD OVERRIDE — hero video sizing ────────────────── */
.hero--new .hero__video{
  position:relative !important;
  width:100% !important;
  max-width:520px !important;
  aspect-ratio:4 / 3 !important;
  height:auto !important;
  border-radius:24px !important;
  overflow:hidden !important;
  background:#000 !important;
  border:4px solid #fff !important;
  margin-left:auto !important;
  box-shadow:0 30px 80px rgba(91,75,224,.22) !important;
}
.hero--new .hero__video video{
  position:absolute !important;
  inset:0 !important;
  width:100% !important;
  height:100% !important;
  object-fit:cover !important;
  display:block !important;
}
.hero--new .hero__right{
  min-width:0 !important;
  max-width:100% !important;
}
@media (max-width:960px){
  .hero--new .hero__video{max-width:100% !important;margin:0 auto !important}
}

/* ── Hero horizontal breathing room ── */
@media (min-width: 961px){
  .hero--new .hero__inner{padding-right:56px}
  .hero--new .hero__right{max-width:520px}
}
/* ═══════════════════════════════════════════════════════════
   PDF VIEWER — smooth continuous scroll
   ═══════════════════════════════════════════════════════════ */

.pdf-scroller {
  scrollbar-width: thin;
  scrollbar-color: #4B5563 #1B1F2A;
}
.pdf-scroller::-webkit-scrollbar {
  width: 10px;
}
.pdf-scroller::-webkit-scrollbar-track {
  background: #1B1F2A;
}
.pdf-scroller::-webkit-scrollbar-thumb {
  background: #4B5563;
  border-radius: 5px;
}
.pdf-scroller::-webkit-scrollbar-thumb:hover {
  background: #6B7280;
}

.pdf-page {
  transition: box-shadow 180ms ease;
}
.pdf-page:hover {
  box-shadow: 0 12px 32px rgba(0,0,0,.45);
}

/* Toolbar — sticky top, centered */
.viewer-toolbar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.1);
  padding: 6px 10px;
  border-radius: 999px;
  color: #fff;
  font-size: 13px;
  backdrop-filter: blur(8px);
}
.viewer-toolbar button {
  background: transparent;
  border: 0;
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background 180ms;
}
.viewer-toolbar button:hover {
  background: rgba(255,255,255,.18);
}
.viewer-toolbar #pageInfo {
  min-width: 60px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.viewer-progress {
  width: 120px;
  height: 4px;
  background: rgba(255,255,255,.15);
  border-radius: 2px;
  overflow: hidden;
  margin-left: 6px;
}
#progBar {
  height: 100%;
  width: 0;
  background: #FF6B6B;
  transition: width .2s ease;
}

/* Mobile tuning */
@media (max-width: 760px) {
  .pdf-page {
    margin-bottom: 12px !important;
  }
  .viewer-toolbar {
    font-size: 12px;
    padding: 4px 8px;
  }
  .viewer-progress {
    width: 80px;
  }
  
}
  /* ── Avatar dropdown menu ────────────────────────────── */
.avatar-menu {
  position: relative;
  display: inline-block;
}
.avatar-menu .avatar {
  border: 0;
  padding: 0;
  cursor: pointer;
}
.avatar-menu__panel {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 240px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(15,23,41,.15);
  overflow: hidden;
  z-index: 100;
  animation: pbDropdown 160ms ease;
}
@keyframes pbDropdown {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.avatar-menu.is-open .avatar-menu__panel {
  display: block;
}
.avatar-menu__header {
  padding: 14px 16px;
  background: linear-gradient(135deg, var(--pb-primary-050), var(--pb-accent-050));
  border-bottom: 1px solid var(--line);
}
.avatar-menu__name {
  font-weight: 700;
  font-size: 14.5px;
  color: var(--ink);
}
.avatar-menu__email {
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 2px;
  word-break: break-all;
}
.avatar-menu__panel a,
.avatar-menu__panel button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--ink-2);
  text-decoration: none;
  border: 0;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  transition: background 120ms;
}
.avatar-menu__panel a:hover,
.avatar-menu__panel button:hover {
  background: var(--bg);
}
.avatar-menu__divider {
  height: 1px;
  background: var(--line);
  margin: 4px 0;
}
.avatar-menu__panel form {
  margin: 0;
}
.avatar-menu__panel form button {
  color: #B91C1C;
  font-weight: 600;
}

/* ═══════════════════════════════════════════════════════════
   CLASS CARDS v2 — chapter counts, chips, popular badge
   ═══════════════════════════════════════════════════════════ */

.class-card--v2 {
  padding: 26px 22px 24px;
  min-height: 260px;
  display: flex;
  flex-direction: column;
}

.class-card--v2 .class-card__popular {
  position: absolute;
  top: 14px;
  right: 14px;
  background: linear-gradient(135deg, #FF6B6B, #FF9F68);
  color: #fff;
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: .04em;
  padding: 4px 10px;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(255,107,107,.35);
}

.class-card--v2 .class-card__num {
  margin-bottom: 2px;
}

.class-card--v2 .class-card__tag {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 16px;
}

.class-card__stats {
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
  font-size: 12.5px;
  color: var(--muted);
  flex-wrap: wrap;
}
.class-card__stats strong {
  display: block;
  font-size: 16px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -.02em;
}
.class-card__stats span {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 60px;
}

.class-card__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 4px;
}
.chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background: var(--bg);
  color: var(--ink-2);
  font-size: 11.5px;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid var(--line);
  white-space: nowrap;
}
.chip--more {
  background: transparent;
  color: var(--muted);
  border-style: dashed;
}

/* Arrow repositions at the bottom-right on v2 cards */
.class-card--v2 .class-card__arrow {
  bottom: 20px;
  right: 20px;
  font-size: 20px;
  font-weight: 700;
}

/* ═══════════════════════════════════════════════════════════
   HERO ACTIVITY PILLS — floating trust signals
   ═══════════════════════════════════════════════════════════ */

.hero__activity-pills {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 3;
}

.activity-pill {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: #fff;
  color: var(--ink);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: -.01em;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(15,23,41,.10), 0 2px 6px rgba(15,23,41,.06);
  border: 1px solid var(--line);
  white-space: nowrap;
  animation: pb-pill-float 7s ease-in-out infinite;
}

.activity-pill--a {
  top: 12%;
  right: 4%;
  animation-delay: 0s;
}
.activity-pill--b {
  top: 46%;
  right: 8%;
  animation-delay: 1.5s;
  background: linear-gradient(135deg, #F2F0FF, #FFEEEE);
  border-color: transparent;
}
.activity-pill--c {
  top: 82%;
  right: 2%;
  animation-delay: 3s;
  background: linear-gradient(135deg, #E7F8F1, #EEECFD);
  border-color: transparent;
}

@keyframes pb-pill-float {
  0%, 100% { transform: translateY(0) translateX(0); }
  25%      { transform: translateY(-8px) translateX(4px); }
  50%      { transform: translateY(-4px) translateX(8px); }
  75%      { transform: translateY(-10px) translateX(2px); }
}

/* Mobile: hide pills (avoid clutter) */
@media (max-width: 900px) {
  .hero__activity-pills { display: none; }
}

/* ── Hero trust strip ──────────────────────────────────── */
.hero__trust-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 22px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--muted);
}
.hero__trust-strip span {
  white-space: nowrap;
}
.hero__trust-strip__dot {
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--muted);
  opacity: .5;
}
@media (max-width: 640px) {
  .hero__trust-strip {
    font-size: 12.5px;
    gap: 8px;
  }
}

/* ════════════════════════════════════════════════════════════
   PadhloBro — Smart Study Tracker (Gen-Z)
   Scoped under .pb-tracker / .pb-* — no bleed into existing UI.
   ════════════════════════════════════════════════════════════ */

.pb-tracker { --pb-trk-radius: 20px; }
.pb-tracker .container { max-width: 1080px; padding: 0 18px; }

.pb-toast-inline { max-width:1080px; margin:16px auto 0; padding:14px 18px; border-radius:14px; font-weight:600; }
.pb-toast-inline--success { background:#E7F8F1; color:#065F46; }

/* ── HEADER ─────────────────────────────────────────────── */
.pb-trk-head { display:flex; justify-content:space-between; align-items:flex-start; gap:20px; flex-wrap:wrap; margin:20px 0 24px; }
.pb-trk-head__title { margin:6px 0 2px; font-size:30px; line-height:1.15; letter-spacing:-0.02em; }
.pb-trk-head__sub { color:var(--muted,#64748B); margin:0; font-size:14px; }
.pb-trk-head__actions { display:flex; gap:8px; }

/* ── STATS GRID ─────────────────────────────────────────── */
.pb-trk-stats { display:grid; grid-template-columns:repeat(4,1fr); gap:14px; margin-bottom:18px; }
@media (max-width:760px){ .pb-trk-stats { grid-template-columns:repeat(2,1fr); } }

.pb-card { background:#fff; border:1px solid #EEF1F6; border-radius:var(--pb-trk-radius); padding:16px 18px; position:relative; overflow:hidden; box-shadow:0 1px 2px rgba(15,23,41,.03); }
.pb-card--primary { background:linear-gradient(135deg,var(--pb-primary,#5B4BE0) 0%,var(--pb-accent,#FF6B6B) 120%); color:#fff; border:none; }
.pb-card--primary .pb-card__label,
.pb-card--primary .pb-card__meta { color:rgba(255,255,255,.85); }
.pb-card--primary .pb-card__big { color:#fff; }
.pb-card__label { font-size:12px; font-weight:700; text-transform:uppercase; letter-spacing:.06em; color:var(--muted,#64748B); margin-bottom:6px; }
.pb-card__big { font-size:34px; font-weight:800; line-height:1; letter-spacing:-0.03em; color:#0F1729; }
.pb-card__meta { font-size:12px; color:var(--muted,#64748B); margin-top:8px; }
.pb-card__meta--dim { opacity:.7; }
.pb-card__progress { height:6px; background:rgba(15,23,41,.06); border-radius:999px; margin-top:10px; overflow:hidden; }
.pb-card--primary .pb-card__progress { background:rgba(255,255,255,.25); }
.pb-card__progress-bar { height:100%; background:linear-gradient(90deg,var(--pb-primary,#5B4BE0),var(--pb-accent,#FF6B6B)); border-radius:999px; transition:width .5s cubic-bezier(.2,.9,.3,1); }
.pb-card--primary .pb-card__progress-bar { background:#fff; }

/* ── XP BAR ─────────────────────────────────────────────── */
.pb-xp { background:#fff; border:1px solid #EEF1F6; border-radius:var(--pb-trk-radius); padding:14px 18px; margin-bottom:14px; }
.pb-xp__head { display:flex; justify-content:space-between; font-size:13px; font-weight:700; color:#0F1729; margin-bottom:8px; }
.pb-xp__level { letter-spacing:-0.01em; }
.pb-xp__count { color:var(--muted,#64748B); }
.pb-xp__bar { height:10px; background:linear-gradient(90deg,#FFF1F1,#F1EFFF); border-radius:999px; overflow:hidden; position:relative; }
.pb-xp__fill { height:100%; background:linear-gradient(90deg,var(--pb-primary,#5B4BE0),var(--pb-accent,#FF6B6B)); border-radius:999px; transition:width .6s cubic-bezier(.2,.9,.3,1); }
.pb-xp__total { font-size:11px; color:var(--muted,#64748B); margin-top:6px; text-align:right; }

/* ── MOTIVATION ─────────────────────────────────────────── */
.pb-motiv { text-align:center; font-size:14px; font-weight:600; color:#0F1729; padding:12px; background:linear-gradient(135deg,#FFF7F7,#F4F1FF); border-radius:14px; margin-bottom:18px; }

/* ── ALERTS ─────────────────────────────────────────────── */
.pb-alert { border-radius:16px; padding:14px 18px; margin-bottom:18px; }
.pb-alert--warn { background:#FFF7ED; border:1px solid #FED7AA; color:#9A3412; }
.pb-alert__head { display:flex; justify-content:space-between; align-items:center; font-weight:700; font-size:14px; margin-bottom:10px; }
.pb-alert__list { list-style:none; padding:0; margin:0; font-size:13px; }
.pb-alert__list li { padding:6px 0; display:flex; align-items:center; gap:8px; }
.pb-alert__more { opacity:.7; font-style:italic; }
.pb-dot { display:inline-block; width:8px; height:8px; border-radius:50%; flex:0 0 auto; }

.pb-btn-sm { background:#fff; border:1px solid #FED7AA; color:#9A3412; font-weight:700; font-size:12px; padding:6px 12px; border-radius:10px; cursor:pointer; transition:transform .1s ease; }
.pb-btn-sm:active { transform:scale(.96); }
.pb-btn-sm:disabled { opacity:.6; cursor:wait; }

/* ── SECTIONS ───────────────────────────────────────────── */
.pb-section { margin:28px 0; }
.pb-section__head { display:flex; justify-content:space-between; align-items:baseline; margin-bottom:14px; }
.pb-section__head h2 { margin:0; font-size:20px; letter-spacing:-0.02em; }
.pb-section__date, .pb-section__hint { font-size:13px; color:var(--muted,#64748B); }

/* ── TASK LIST ──────────────────────────────────────────── */
.pb-task-list { list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:10px; }
.pb-task { display:flex; gap:14px; align-items:flex-start; padding:14px 16px; background:#fff; border:1px solid #EEF1F6; border-left:4px solid var(--accent,var(--pb-primary)); border-radius:14px; cursor:pointer; transition:transform .12s ease, box-shadow .12s ease; position:relative; }
.pb-task:hover { transform:translateY(-1px); box-shadow:0 4px 14px rgba(15,23,41,.06); }
.pb-task.is-done { opacity:.55; }
.pb-task.is-done .pb-task__subject,
.pb-task.is-done .pb-task__row2 { text-decoration:line-through; }
.pb-task__check { flex:0 0 auto; width:24px; height:24px; border-radius:8px; border:2px solid #D6DBE5; background:#fff; cursor:pointer; transition:all .15s ease; display:grid; place-items:center; margin-top:2px; }
.pb-task.is-done .pb-task__check { background:var(--pb-success,#10B981); border-color:var(--pb-success,#10B981); }
.pb-task.is-done .pb-task__check::after { content:"✔"; color:#fff; font-weight:800; font-size:14px; }
.pb-task__body { flex:1; min-width:0; }
.pb-task__row1 { display:flex; justify-content:space-between; gap:10px; align-items:baseline; }
.pb-task__subject { font-weight:700; color:#0F1729; font-size:14px; }
.pb-task__xp { font-size:11px; font-weight:700; color:var(--pb-primary,#5B4BE0); background:#F1EFFF; padding:3px 8px; border-radius:999px; }
.pb-task__row2 { font-size:13px; color:#334155; margin-top:2px; }
.pb-task__row3 { font-size:12px; color:var(--muted,#64748B); margin-top:4px; display:flex; align-items:center; gap:8px; }
.pb-tag { font-size:10px; font-weight:700; letter-spacing:.05em; padding:2px 6px; border-radius:6px; }
.pb-tag--rev { background:#FEF3C7; color:#92400E; }

.pb-xp-pulse { position:absolute; right:16px; top:50%; transform:translateY(-50%); font-weight:800; color:var(--pb-success,#10B981); font-size:13px; animation:pb-xp-pulse .9s ease forwards; pointer-events:none; }
@keyframes pb-xp-pulse { 0%{opacity:0; transform:translate(0,-50%);} 30%{opacity:1;} 100%{opacity:0; transform:translate(10px,-90%);} }

/* ── EMPTY ──────────────────────────────────────────────── */
.pb-empty { background:#fff; border:1px dashed #D6DBE5; border-radius:16px; padding:40px 20px; text-align:center; }
.pb-empty__emoji { font-size:44px; margin-bottom:8px; }
.pb-empty__title { font-weight:700; margin:0; color:#0F1729; }
.pb-empty__sub { font-size:13px; color:var(--muted,#64748B); margin:6px 0 0; }

/* ── SUBJECTS ───────────────────────────────────────────── */
.pb-subj-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:12px; }
.pb-subj { background:#fff; border:1px solid #EEF1F6; border-radius:16px; padding:14px 16px; }
.pb-subj__head { display:flex; justify-content:space-between; align-items:baseline; margin-bottom:8px; }
.pb-subj__name { font-weight:700; color:#0F1729; font-size:14px; }
.pb-subj__pct { font-weight:800; color:var(--accent,var(--pb-primary)); font-size:14px; }
.pb-subj__bar { height:8px; background:#F1F5F9; border-radius:999px; overflow:hidden; }
.pb-subj__fill { height:100%; background:var(--accent,var(--pb-primary)); border-radius:999px; transition:width .5s ease; }
.pb-subj__meta { font-size:12px; color:var(--muted,#64748B); margin-top:8px; }

/* ── WEEKLY ─────────────────────────────────────────────── */
.pb-week { display:grid; grid-template-columns:repeat(7,1fr); gap:8px; }
@media (max-width:560px){ .pb-week { gap:5px; } }
.pb-week__day { background:#fff; border:1px solid #EEF1F6; border-radius:14px; padding:10px 6px; text-align:center; transition:transform .12s ease; }
.pb-week__day.is-today { border-color:var(--pb-primary,#5B4BE0); background:#F6F4FF; box-shadow:0 0 0 3px rgba(91,75,224,.08); }
.pb-week__day.is-off { background:#F8FAFC; opacity:.7; }
.pb-week__dow { font-size:11px; font-weight:700; text-transform:uppercase; color:var(--muted,#64748B); letter-spacing:.05em; }
.pb-week__num { font-size:16px; font-weight:800; color:#0F1729; margin:2px 0 6px; }
.pb-week__pill { font-size:11px; font-weight:700; padding:3px 6px; border-radius:8px; background:#F1F5F9; color:#475569; }
.pb-week__pill--done { background:#E7F8F1; color:#065F46; }
.pb-week__pill--off { background:transparent; color:#94A3B8; }
.pb-week__pill--empty { background:transparent; color:#CBD5E1; }

/* ── EXAM FORM ──────────────────────────────────────────── */
.pb-exam-form { display:flex; gap:10px; align-items:center; flex-wrap:wrap; background:#fff; border:1px solid #EEF1F6; border-radius:14px; padding:14px; }
.pb-exam-form input[type=date] { flex:1; min-width:180px; padding:10px 12px; border-radius:10px; border:1px solid #D6DBE5; font-size:14px; }

/* ════════════════════════════════════════════════════════════
   MASTERY VIEW
   ════════════════════════════════════════════════════════════ */
.pb-mast-head { display:flex; justify-content:space-between; gap:20px; flex-wrap:wrap; margin:10px 0 24px; align-items:flex-start; }
.pb-mast-head__subject { display:inline-block; font-size:11px; font-weight:800; letter-spacing:.08em; text-transform:uppercase; padding:4px 10px; border-radius:999px; color:#fff; background:var(--accent,var(--pb-primary)); margin-bottom:8px; }
.pb-mast-head__title { margin:0 0 8px; font-size:26px; line-height:1.2; letter-spacing:-0.02em; }
.pb-mast-head__weight { display:flex; align-items:center; gap:10px; font-size:13px; color:var(--muted,#64748B); }
.pb-weight { letter-spacing:3px; color:var(--pb-accent,#FF6B6B); font-size:16px; }
.pb-weight__label { font-weight:600; }
.pb-mast-head__xp { text-align:right; background:linear-gradient(135deg,#FFF7F7,#F4F1FF); border-radius:14px; padding:12px 18px; }
.pb-mast-head__xp-num { font-size:22px; font-weight:800; color:var(--pb-primary,#5B4BE0); letter-spacing:-0.02em; }
.pb-mast-head__xp-lbl { font-size:11px; color:var(--muted,#64748B); text-transform:uppercase; letter-spacing:.05em; margin-top:2px; }

.pb-boss-banner { display:flex; align-items:center; gap:14px; background:linear-gradient(135deg,#FFFBEB,#FEF3C7); border:1px solid #FDE68A; border-radius:18px; padding:16px 20px; margin-bottom:20px; }
.pb-boss-banner__emoji { font-size:34px; }
.pb-boss-banner__title { font-weight:800; color:#92400E; font-size:16px; letter-spacing:-0.01em; }
.pb-boss-banner__sub { font-size:12px; color:#B45309; margin-top:2px; }

.pb-mast-flow { list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:10px; }
.pb-mast-step { display:flex; gap:14px; align-items:center; padding:16px 18px; background:#fff; border:1px solid #EEF1F6; border-radius:16px; transition:transform .12s ease, box-shadow .15s ease; }
.pb-mast-step:hover { transform:translateY(-1px); box-shadow:0 4px 14px rgba(15,23,41,.05); }
.pb-mast-step.is-on { background:linear-gradient(135deg,#F0FDF4,#ECFDF5); border-color:#A7F3D0; }
.pb-mast-step.is-locked { opacity:.55; cursor:not-allowed; }
.pb-mast-step__check { flex:0 0 auto; width:28px; height:28px; border-radius:9px; border:2px solid #D6DBE5; background:#fff; cursor:pointer; display:grid; place-items:center; color:#fff; font-weight:800; font-size:15px; transition:all .15s ease; }
.pb-mast-step.is-on .pb-mast-step__check { background:var(--pb-success,#10B981); border-color:var(--pb-success,#10B981); }
.pb-mast-step__check:disabled { cursor:not-allowed; }
.pb-mast-step__body { display:flex; gap:14px; align-items:center; flex:1; }
.pb-mast-step__icon { font-size:24px; width:38px; height:38px; display:grid; place-items:center; background:#F8FAFC; border-radius:12px; flex:0 0 auto; }
.pb-mast-step.is-on .pb-mast-step__icon { background:#fff; }
.pb-mast-step__label { font-weight:700; color:#0F1729; font-size:15px; }
.pb-mast-step__sub { font-size:12px; color:var(--muted,#64748B); margin-top:2px; }

.pb-mast-footer { display:flex; justify-content:space-between; gap:10px; margin:30px 0 10px; }

/* ── BOSS FLASH ─────────────────────────────────────────── */
.pb-boss-flash { position:fixed; inset:0; display:grid; place-items:center; pointer-events:none; z-index:9999; opacity:0; animation:pb-boss-in .5s ease forwards; }
.pb-boss-flash__emoji { font-size:96px; filter:drop-shadow(0 20px 40px rgba(255,107,107,.5)); animation:pb-boss-zoom .8s cubic-bezier(.2,1.2,.4,1); }
.pb-boss-flash__txt { position:absolute; top:60%; font-weight:800; font-size:20px; color:#0F1729; background:#fff; padding:12px 22px; border-radius:999px; box-shadow:0 12px 40px rgba(15,23,41,.15); }
.pb-boss-flash.is-out { animation:pb-boss-out .6s ease forwards; }
@keyframes pb-boss-in { to { opacity:1; } }
@keyframes pb-boss-out { to { opacity:0; } }
@keyframes pb-boss-zoom { 0%{transform:scale(.4) rotate(-15deg);} 60%{transform:scale(1.15) rotate(5deg);} 100%{transform:scale(1) rotate(0);} }
/* Nav: hot Tracker pill */
.nav__link--hot {
  background: linear-gradient(135deg, var(--pb-primary) 0%, var(--pb-accent) 120%);
  color: #fff !important;
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: -0.01em;
  box-shadow: 0 4px 14px rgba(255,107,107,.28);
  transition: transform .12s ease, box-shadow .12s ease;
}
.nav__link--hot:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(255,107,107,.35); text-decoration: none; }
.nav__link--hot.is-active { box-shadow: 0 0 0 3px rgba(255,107,107,.25); }
/* ════════════════════════════════════════════════════════════
   PadhloBro — StudyForge
   Scoped under .pb-forge / .pb-* — no bleed into existing UI.
   ════════════════════════════════════════════════════════════ */

/* ── INDEX GRID ─────────────────────────────────────────── */
.pb-forge-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:14px; }
.pb-forge-card { display:block; background:#fff; border:1px solid #EEF1F6; border-radius:18px; padding:16px 18px; text-decoration:none; color:inherit; transition:transform .14s ease, box-shadow .14s ease; }
.pb-forge-card:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(15,23,41,.08); text-decoration:none; }
.pb-forge-card__head { display:flex; justify-content:space-between; align-items:center; margin-bottom:10px; }
.pb-forge-card__subject { font-size:10px; font-weight:800; letter-spacing:.06em; text-transform:uppercase; color:#fff; padding:3px 9px; border-radius:999px; }
.pb-forge-card__status { font-size:10px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; color:#64748B; padding:3px 8px; border-radius:999px; background:#F1F5F9; }
.pb-forge-card__status--ready { background:#E7F8F1; color:#065F46; }
.pb-forge-card__status--generating,
.pb-forge-card__status--parsing { background:#FEF4E2; color:#92400E; }
.pb-forge-card__status--failed { background:#FEE2E2; color:#B91C1C; }
.pb-forge-card__title { font-size:15px; margin:4px 0 4px; color:#0F1729; letter-spacing:-0.01em; font-weight:700; }
.pb-forge-card__chapter { font-size:12px; color:#64748B; margin:0 0 10px; }
.pb-forge-card__meta { display:flex; gap:10px; font-size:11.5px; color:#475569; font-weight:600; margin-bottom:8px; }
.pb-forge-card__date { font-size:11px; color:#94A3B8; }

/* ── FORM ───────────────────────────────────────────────── */
.pb-forge-form { background:#fff; border:1px solid #EEF1F6; border-radius:20px; padding:24px; max-width:800px; margin:0 auto; }
.pb-forge-tabs { display:flex; gap:6px; margin-bottom:20px; padding:4px; background:#F1F5F9; border-radius:12px; }
.pb-forge-tabs--sticky { position:sticky; top:8px; z-index:10; background:#fff; padding:8px; border-radius:14px; box-shadow:0 2px 8px rgba(15,23,41,.06); flex-wrap:wrap; }
.pb-forge-tab { flex:1; padding:10px 14px; background:transparent; border:none; border-radius:9px; font-weight:600; font-size:13.5px; color:#64748B; cursor:pointer; transition:all .15s; min-width:0; }
.pb-forge-tab:hover { color:#0F1729; }
.pb-forge-tab.is-active { background:#fff; color:#0F1729; box-shadow:0 1px 3px rgba(15,23,41,.08); }
.pb-forge-panel { display:none; margin-top:16px; }
.pb-forge-panel.is-active { display:block; animation:pbFadeIn .25s ease; }
@keyframes pbFadeIn { from { opacity:0; transform:translateY(4px); } to { opacity:1; transform:translateY(0); } }
.pb-forge-label { display:block; font-size:12px; font-weight:700; text-transform:uppercase; letter-spacing:.05em; color:#64748B; margin-bottom:6px; }
.pb-forge-hint { font-weight:500; text-transform:none; letter-spacing:0; }
.pb-forge-form textarea,
.pb-forge-form input[type=text],
.pb-forge-form select { width:100%; padding:11px 13px; border:1px solid #D6DBE5; border-radius:11px; font-size:14px; font-family:inherit; background:#fff; transition:border-color .15s; }
.pb-forge-form textarea { resize:vertical; min-height:180px; line-height:1.55; }
.pb-forge-form textarea:focus,
.pb-forge-form input[type=text]:focus,
.pb-forge-form select:focus { outline:none; border-color:var(--pb-primary); box-shadow:0 0 0 3px rgba(91,75,224,.1); }
.pb-forge-grid-2 { display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-top:14px; }
@media (max-width:640px){ .pb-forge-grid-2 { grid-template-columns:1fr; } }
.pb-forge-dropzone { display:flex; flex-direction:column; align-items:center; justify-content:center; gap:8px; padding:32px 20px; border:2px dashed #D6DBE5; border-radius:14px; background:#F8FAFC; cursor:pointer; transition:all .15s; text-align:center; }
.pb-forge-dropzone:hover,
.pb-forge-dropzone.is-hover { border-color:var(--pb-primary); background:#F4F1FF; }
.pb-forge-dropzone__icon { font-size:40px; }
.pb-forge-dropzone__text { font-weight:600; color:#0F1729; }
.pb-forge-dropzone__hint { font-size:12px; color:#64748B; }
.pb-forge-submit { display:flex; justify-content:flex-end; gap:10px; margin-top:20px; }
.pb-forge-note { font-size:12.5px; color:#64748B; text-align:center; margin-top:14px; }

/* ── HANDWRITTEN NOTES ──────────────────────────────────── */
.pb-notes-toolbar { display:flex; align-items:center; gap:8px; margin-bottom:14px; flex-wrap:wrap; background:#fff; border:1px solid #EEF1F6; padding:10px 12px; border-radius:12px; }
.pb-notes-toolbar__label { font-size:12px; font-weight:700; color:#64748B; margin-right:4px; }
.pb-style-chip { width:34px; height:34px; border-radius:9px; background:#fff; border:1.5px solid #E6E8F0; cursor:pointer; font-size:18px; font-weight:700; transition:all .15s; }
.pb-style-chip.is-active { border-color:var(--pb-primary); box-shadow:0 0 0 3px rgba(91,75,224,.12); }
.pb-style-chip:hover { transform:scale(1.06); }
.pb-notes-toolbar__print { margin-left:auto; background:#F1F5F9; border:none; padding:8px 14px; border-radius:9px; font-size:12.5px; font-weight:700; color:#475569; cursor:pointer; transition:background .15s; }
.pb-notes-toolbar__print:hover { background:#E2E8F0; }
.pb-notes-paper {
  padding:26px 34px;
  border-radius:12px;
  line-height:1.85;
  font-size:22px;
  box-shadow:0 6px 26px rgba(15,23,41,.07);
  background-image: repeating-linear-gradient(transparent, transparent 34px, rgba(15,23,41,.06) 34px, rgba(15,23,41,.06) 35px);
  background-position: 0 20px;
  transform: rotate(-0.25deg);
  white-space: pre-wrap;
  word-wrap: break-word;
}
@media (max-width:640px) { .pb-notes-paper { font-size:18px; line-height:1.7; padding:20px 22px; background-image:repeating-linear-gradient(transparent, transparent 28px, rgba(15,23,41,.06) 28px, rgba(15,23,41,.06) 29px); } }
@media print {
  .pb-forge-tabs, .pb-notes-toolbar, .nav, .bottom-nav, footer { display:none !important; }
  .pb-notes-paper { box-shadow:none; transform:none; }
}

/* ── MCQ LIST ───────────────────────────────────────────── */
.pb-mcq-list { list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:16px; }
.pb-mcq { background:#fff; border:1px solid #EEF1F6; border-radius:16px; padding:18px 20px; }
.pb-mcq__q { font-size:15px; font-weight:600; color:#0F1729; margin-bottom:12px; line-height:1.55; }
.pb-mcq__num { display:inline-block; font-size:11px; font-weight:800; background:var(--pb-primary-050,#EEECFD); color:var(--pb-primary,#5B4BE0); padding:2px 8px; border-radius:6px; margin-right:8px; letter-spacing:.04em; }
.pb-mcq__opts { display:grid; grid-template-columns:1fr; gap:8px; }
.pb-mcq__opt { display:flex; align-items:flex-start; gap:12px; padding:11px 14px; background:#F8FAFC; border:1.5px solid #E6E8F0; border-radius:11px; cursor:pointer; font-size:14px; text-align:left; transition:all .14s; font-family:inherit; }
.pb-mcq__opt:hover { background:#F1F5F9; border-color:#CBD5E1; }
.pb-mcq__opt.is-correct { background:#E7F8F1; border-color:#10B981; }
.pb-mcq__opt.is-wrong { background:#FEE2E2; border-color:#EF4444; }
.pb-mcq__letter { font-weight:800; color:#64748B; flex:0 0 auto; }
.pb-mcq__opt.is-correct .pb-mcq__letter { color:#065F46; }
.pb-mcq__opt.is-wrong .pb-mcq__letter { color:#B91C1C; }
.pb-mcq__feedback { margin-top:12px; padding:12px 14px; border-radius:11px; background:#F8FAFC; font-size:13.5px; }
.pb-mcq__verdict { font-weight:700; margin-bottom:4px; }
.pb-mcq__expl { color:#475569; }

/* ── FLASHCARDS ─────────────────────────────────────────── */
.pb-flash-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:14px; }
.pb-flash { perspective:1000px; cursor:pointer; height:170px; }
.pb-flash__inner { position:relative; width:100%; height:100%; transition:transform .5s cubic-bezier(.2,.9,.3,1); transform-style:preserve-3d; }
.pb-flash.is-flipped .pb-flash__inner { transform:rotateY(180deg); }
.pb-flash__face { position:absolute; inset:0; backface-visibility:hidden; -webkit-backface-visibility:hidden; border-radius:16px; padding:16px; display:flex; flex-direction:column; justify-content:center; align-items:center; text-align:center; box-shadow:0 4px 16px rgba(15,23,41,.06); }
.pb-flash__front { background:linear-gradient(135deg,#EEECFD,#F4F1FF); border:1.5px solid #DAD5F8; }
.pb-flash__back { background:linear-gradient(135deg,#E7F8F1,#F0FDF4); border:1.5px solid #A7F3D0; transform:rotateY(180deg); }
.pb-flash__label { font-size:10px; font-weight:800; letter-spacing:.08em; text-transform:uppercase; color:#64748B; margin-bottom:8px; }
.pb-flash__text { font-weight:600; color:#0F1729; font-size:14px; line-height:1.45; }
.pb-flash__hint { font-size:11px; color:#94A3B8; margin-top:8px; }

/* ── BOARD QUESTIONS ────────────────────────────────────── */
.pb-board-list { list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:14px; }
.pb-board { background:#fff; border:1px solid #EEF1F6; border-radius:16px; padding:18px 20px; }
.pb-board__head { margin-bottom:10px; }
.pb-board__marks { display:inline-block; font-size:11px; font-weight:800; background:#FEF4E2; color:#92400E; padding:3px 10px; border-radius:999px; letter-spacing:.04em; }
.pb-board__q { font-size:15px; color:#0F1729; line-height:1.55; margin-bottom:12px; font-weight:500; }
.pb-board__reveal summary { cursor:pointer; font-weight:700; color:var(--pb-primary,#5B4BE0); font-size:13px; user-select:none; padding:6px 0; }
.pb-board__reveal summary:hover { text-decoration:underline; }
.pb-board__answer { margin-top:10px; padding:14px 16px; background:#F8FAFC; border-radius:11px; font-size:13.5px; line-height:1.6; color:#0F1729; }
.pb-board__hint { margin-top:10px; font-size:12.5px; color:#64748B; padding:10px 14px; background:#FEF4E2; border-radius:9px; border-left:3px solid #F59E0B; }

/* ── AUDIO ──────────────────────────────────────────────── */
.pb-audio { background:#fff; border:1px solid #EEF1F6; border-radius:16px; padding:20px; }
.pb-audio__controls { display:flex; gap:10px; align-items:center; margin-bottom:16px; flex-wrap:wrap; }
.pb-audio__rate { padding:6px 10px; border-radius:8px; border:1px solid #D6DBE5; font-size:12.5px; font-weight:600; }
.pb-audio__script { padding:16px 18px; background:#F8FAFC; border-radius:11px; font-size:14px; line-height:1.7; color:#334155; max-height:420px; overflow-y:auto; }

/* ── PRACTICE MODE ──────────────────────────────────────── */
.pb-practice-bar { position:sticky; top:8px; z-index:10; background:#fff; border:1px solid #EEF1F6; border-radius:14px; padding:12px 16px; margin-bottom:20px; box-shadow:0 2px 8px rgba(15,23,41,.06); }
.pb-practice-bar__progress { height:8px; background:#F1F5F9; border-radius:999px; overflow:hidden; margin-bottom:8px; }
.pb-practice-bar__fill { height:100%; width:0; background:linear-gradient(90deg,var(--pb-primary),var(--pb-accent)); border-radius:999px; transition:width .35s ease; }
.pb-practice-bar__meta { display:flex; justify-content:space-between; font-size:12.5px; font-weight:700; color:#475569; }
.pb-practice-bar__score { color:#64748B; font-weight:600; }
.pb-practice-list { list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:18px; }
.pb-practice-q { background:#fff; border:1px solid #EEF1F6; border-radius:18px; padding:20px 22px; }
.pb-practice-q__head { display:flex; justify-content:space-between; align-items:center; margin-bottom:10px; }
.pb-practice-q__num { font-size:12px; font-weight:800; background:var(--pb-primary-050,#EEECFD); color:var(--pb-primary,#5B4BE0); padding:3px 10px; border-radius:8px; letter-spacing:.04em; }
.pb-practice-q__diff { color:var(--pb-accent,#FF6B6B); letter-spacing:2px; font-size:13px; }
.pb-practice-q__text { font-size:15.5px; font-weight:600; color:#0F1729; line-height:1.55; margin-bottom:14px; }
.pb-practice-q__opts { display:grid; grid-template-columns:1fr; gap:9px; }
@media (min-width:560px){ .pb-practice-q__opts { grid-template-columns:1fr 1fr; } }
.pb-practice-opt { display:flex; align-items:flex-start; gap:12px; padding:12px 15px; background:#F8FAFC; border:1.5px solid #E6E8F0; border-radius:12px; cursor:pointer; font-size:14px; text-align:left; transition:all .14s; font-family:inherit; }
.pb-practice-opt:hover { background:#F1F5F9; border-color:#CBD5E1; }
.pb-practice-opt.is-correct { background:#E7F8F1; border-color:#10B981; }
.pb-practice-opt.is-wrong { background:#FEE2E2; border-color:#EF4444; }
.pb-practice-opt__letter { font-weight:800; color:#64748B; flex:0 0 auto; }
.pb-practice-opt.is-correct .pb-practice-opt__letter { color:#065F46; }
.pb-practice-opt.is-wrong .pb-practice-opt__letter { color:#B91C1C; }
.pb-practice-q__fb { margin-top:14px; padding:12px 15px; border-radius:11px; font-size:13.5px; }
.pb-practice-q__fb.is-ok { background:#E7F8F1; color:#065F46; font-weight:600; }
.pb-practice-q__fb.is-no { background:#FEE2E2; color:#991B1B; }
.pb-practice-done { text-align:center; padding:40px 24px; background:#fff; border:1px solid #EEF1F6; border-radius:20px; margin-top:20px; }
.pb-practice-done__emoji { font-size:52px; margin-bottom:8px; }
.pb-practice-done h2 { margin:0 0 8px; letter-spacing:-0.02em; }
.pb-practice-done p { color:#475569; margin:0 0 20px; }
.pb-practice-done__actions { display:flex; justify-content:center; gap:10px; flex-wrap:wrap; }
/* ── StudyForge — Generation Progress Panel ──────────────── */
.pb-gen-panel {
  background: linear-gradient(135deg,#F4F1FF,#EEF7FF);
  border:1.5px solid #DAD5F8;
  border-radius:18px;
  padding:20px 22px;
  margin-bottom:20px;
}
.pb-gen-panel__head { display:flex; justify-content:space-between; align-items:baseline; margin-bottom:14px; }
.pb-gen-panel__title { font-weight:800; color:#0F1729; font-size:15px; letter-spacing:-0.01em; }
.pb-gen-panel__eta { font-size:12.5px; color:#64748B; font-weight:600; }
.pb-gen-panel__bar { height:10px; background:rgba(91,75,224,.10); border-radius:999px; overflow:hidden; margin-bottom:16px; }
.pb-gen-panel__fill { height:100%; width:0; background:linear-gradient(90deg,var(--pb-primary),var(--pb-accent)); border-radius:999px; transition:width .5s cubic-bezier(.2,.9,.3,1); }
.pb-gen-panel__steps { list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:8px; }
.pb-gen-step { display:flex; align-items:center; gap:10px; font-size:14px; font-weight:600; color:#64748B; padding:8px 10px; border-radius:10px; transition:all .18s; }
.pb-gen-step__dot { width:12px; height:12px; border-radius:50%; background:#CBD5E1; flex:0 0 auto; transition:all .18s; }
.pb-gen-step.is-running { background:#fff; color:#0F1729; box-shadow:0 1px 3px rgba(15,23,41,.05); }
.pb-gen-step.is-running .pb-gen-step__dot { background:var(--pb-primary); animation:pbPulse 1s ease-in-out infinite; }
.pb-gen-step.is-done { color:#065F46; }
.pb-gen-step.is-done .pb-gen-step__dot { background:var(--pb-success); }
.pb-gen-step.is-done .pb-gen-step__dot::after { content:"✔"; color:#fff; font-weight:800; font-size:10px; display:grid; place-items:center; width:100%; height:100%; }
.pb-gen-step.is-failed { color:#B91C1C; }
.pb-gen-step.is-failed .pb-gen-step__dot { background:#EF4444; }
.pb-gen-panel__hint { font-size:12.5px; color:#64748B; margin:14px 0 0; text-align:center; }
@keyframes pbPulse {
  0%,100% { transform:scale(1); opacity:1; }
  50% { transform:scale(1.35); opacity:.65; }
}

/* Nav: StudyForge pill */
.nav__link--forge {
  background: linear-gradient(135deg,#5B4BE0 0%,#8B5CF6 120%);
  color: #fff !important;
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: -0.01em;
  box-shadow: 0 4px 14px rgba(91,75,224,.28);
  transition: transform .12s ease, box-shadow .12s ease;
  margin-left: 6px;
}
.nav__link--forge:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(91,75,224,.35); text-decoration: none; }
.nav__link--forge.is-active { box-shadow: 0 0 0 3px rgba(91,75,224,.25); }
/* ════════════════════════════════════════════════════════════
   PadhloBro — Revision Mode
   ════════════════════════════════════════════════════════════ */

/* Revision calendar grid */
.pb-rev-cal {
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(80px, 1fr));
  gap:8px;
}
.pb-rev-cal__day {
  background:#fff;
  border:1.5px solid #EEF1F6;
  border-radius:14px;
  padding:10px 8px;
  text-align:center;
  transition:transform .12s, box-shadow .12s;
  position:relative;
}
.pb-rev-cal__day:hover { transform:translateY(-1px); box-shadow:0 4px 12px rgba(15,23,41,.06); }
.pb-rev-cal__dow { font-size:10px; font-weight:700; text-transform:uppercase; color:#94A3B8; letter-spacing:.05em; }
.pb-rev-cal__num { font-size:18px; font-weight:800; color:#0F1729; line-height:1.1; margin:2px 0 4px; }
.pb-rev-cal__pill {
  font-size:11px;
  font-weight:700;
  padding:3px 6px;
  border-radius:8px;
  background:#F1F5F9;
  color:#475569;
  display:inline-block;
}
.pb-rev-cal__type {
  font-size:9px;
  font-weight:700;
  letter-spacing:.05em;
  text-transform:uppercase;
  color:#64748B;
  margin-top:4px;
}
.pb-rev-cal__day.is-today {
  border-color:var(--pb-primary);
  background:#F6F4FF;
  box-shadow:0 0 0 3px rgba(91,75,224,.10);
}
.pb-rev-cal__day.is-done { opacity:.65; }
.pb-rev-cal__day.is-done .pb-rev-cal__pill { background:#E7F8F1; color:#065F46; }
.pb-rev-cal__day--pyq   { border-left:3px solid #F59E0B; }
.pb-rev-cal__day--mock  { border-left:3px solid #EF4444; }
.pb-rev-cal__day--weak  { border-left:3px solid #F97316; }
.pb-rev-cal__day--light { border-left:3px solid #10B981; }
.pb-rev-cal__day--revision { border-left:3px solid #5B4BE0; }

/* Feedback grid */
.pb-fb-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(220px, 1fr));
  gap:12px;
}
.pb-fb {
  background:#fff;
  border:1.5px solid #EEF1F6;
  border-radius:16px;
  padding:14px 16px;
  position:relative;
  overflow:hidden;
}
.pb-fb::before {
  content:"";
  position:absolute;
  left:0; top:0; bottom:0;
  width:4px;
  background:var(--accent, var(--pb-primary));
}
.pb-fb__name { font-weight:700; color:#0F1729; font-size:14px; margin-bottom:10px; }
.pb-fb__opts { display:flex; gap:6px; }
.pb-fb__opts button {
  flex:1;
  background:#F8FAFC;
  border:1.5px solid #E6E8F0;
  border-radius:10px;
  padding:8px 0;
  font-size:20px;
  cursor:pointer;
  transition:all .12s;
}
.pb-fb__opts button:hover { background:#F1F5F9; transform:translateY(-1px); }
.pb-fb__opts button.is-active {
  background:var(--accent-050, #EEECFD);
  border-color:var(--accent, var(--pb-primary));
}

/* Feedback log */
.pb-fb-log { list-style:none; padding:0; margin:0; }
.pb-fb-log li { padding:8px 0; font-size:13px; color:#334155; display:flex; align-items:center; gap:8px; }
.pb-fb-log li strong { color:#0F1729; }
/* ════════════════════════════════════════════════════════════
   PadhloBro CRM — Assignments
   ════════════════════════════════════════════════════════════ */

/* Filter chips */
.pb-crm-chips { display:flex; flex-wrap:wrap; gap:6px; margin-bottom:16px; }
.pb-crm-chip {
  display:inline-flex; align-items:center; gap:6px;
  padding:8px 14px;
  background:#fff;
  border:1.5px solid #EEF1F6;
  border-radius:999px;
  font-size:13px; font-weight:600; color:#475569;
  text-decoration:none;
  transition:all .12s;
}
.pb-crm-chip:hover { border-color:#CBD5E1; text-decoration:none; }
.pb-crm-chip.is-active { background:var(--pb-primary); color:#fff; border-color:var(--pb-primary); }
.pb-crm-chip.is-active span { background:rgba(255,255,255,.25); color:#fff; }
.pb-crm-chip--warn.is-active { background:var(--pb-accent); border-color:var(--pb-accent); }
.pb-crm-chip span { font-size:11px; font-weight:800; background:#F1F5F9; color:#64748B; padding:1px 7px; border-radius:8px; }
.pb-crm-chip__sep { flex-basis:100%; height:0; }

/* Search */
.pb-crm-search { margin-bottom:20px; }
.pb-crm-search input {
  width:100%; max-width:420px;
  padding:11px 14px;
  border:1.5px solid #EEF1F6; border-radius:12px;
  font-size:14px; font-family:inherit; background:#fff;
}
.pb-crm-search input:focus { outline:none; border-color:var(--pb-primary); box-shadow:0 0 0 3px rgba(91,75,224,.10); }

/* List */
.pb-crm-list { list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:8px; }
.pb-crm-row {
  display:flex; align-items:center; gap:14px;
  padding:14px 16px;
  background:#fff; border:1.5px solid #EEF1F6; border-radius:14px;
  transition:transform .12s, box-shadow .12s, opacity .12s;
  cursor:pointer;
}
.pb-crm-row:hover { transform:translateY(-1px); box-shadow:0 4px 14px rgba(15,23,41,.06); }
.pb-crm-row.is-done { opacity:.55; }
.pb-crm-row.is-done .pb-crm-row__title { text-decoration:line-through; }

.pb-crm-check {
  flex:0 0 auto;
  width:22px; height:22px;
  border-radius:8px;
  border:2px solid #D6DBE5;
  background:#fff;
  cursor:pointer;
  transition:all .15s;
  display:grid; place-items:center;
}
.pb-crm-check[data-status="done"] { background:var(--pb-success); border-color:var(--pb-success); }
.pb-crm-check[data-status="done"]::after { content:"✔"; color:#fff; font-weight:800; font-size:13px; }
.pb-crm-check:hover { border-color:var(--pb-primary); }

.pb-crm-row__body { flex:1; min-width:0; }
.pb-crm-row__top { display:flex; align-items:center; gap:8px; margin-bottom:3px; }
.pb-crm-row__title { font-weight:700; color:#0F1729; font-size:14.5px; text-decoration:none; letter-spacing:-0.005em; }
.pb-crm-row__title:hover { color:var(--pb-primary); }
.pb-crm-row__meta { font-size:12.5px; color:#64748B; display:flex; align-items:center; gap:6px; flex-wrap:wrap; }
.pb-crm-row__subj { font-weight:700; }
.pb-crm-row__subj::before { content:"· "; color:var(--accent, #5B4BE0); font-weight:900; margin-right:2px; }

.pb-crm-prio { font-size:10px; font-weight:800; padding:2px 7px; border-radius:6px; text-transform:uppercase; letter-spacing:.05em; }
.pb-crm-prio--low    { background:#E7F8F1; color:#065F46; }
.pb-crm-prio--high   { background:#FEF4E2; color:#92400E; }
.pb-crm-prio--urgent { background:#FEE2E2; color:#991B1B; }

.pb-crm-due { font-size:12px; font-weight:700; color:#64748B; padding:4px 10px; border-radius:8px; background:#F8FAFC; white-space:nowrap; }
.pb-crm-due.is-today   { background:#FEF4E2; color:#92400E; }
.pb-crm-due.is-overdue { background:#FEE2E2; color:#991B1B; }

/* Form */
.pb-crm-form { background:#fff; border:1.5px solid #EEF1F6; border-radius:20px; padding:24px; max-width:760px; }
.pb-crm-form > label { display:block; margin-bottom:16px; }
.pb-crm-form textarea,
.pb-crm-form input[type=text],
.pb-crm-form input[type=date],
.pb-crm-form input[type=number],
.pb-crm-form select {
  width:100%; padding:11px 13px; border:1.5px solid #D6DBE5; border-radius:11px;
  font-size:14px; font-family:inherit; background:#fff; transition:border-color .15s;
}
.pb-crm-form textarea { resize:vertical; min-height:80px; line-height:1.55; }
.pb-crm-form textarea:focus,
.pb-crm-form input:focus,
.pb-crm-form select:focus { outline:none; border-color:var(--pb-primary); box-shadow:0 0 0 3px rgba(91,75,224,.10); }

/* Kanban */
.pb-kb { display:grid; grid-template-columns:repeat(4, 1fr); gap:14px; align-items:start; }
@media (max-width:900px){ .pb-kb { grid-template-columns:repeat(2, 1fr); } }
@media (max-width:560px){ .pb-kb { grid-template-columns:1fr; } }
.pb-kb__col { background:#F8FAFC; border-radius:16px; padding:12px; min-height:200px; }
.pb-kb__head { display:flex; justify-content:space-between; align-items:center; margin-bottom:10px; padding:0 4px; }
.pb-kb__title { font-size:13px; font-weight:800; color:#0F1729; letter-spacing:-0.005em; text-transform:uppercase; }
.pb-kb__count { font-size:11px; font-weight:800; background:#fff; color:#64748B; padding:2px 8px; border-radius:8px; }
.pb-kb__drop { min-height:80px; display:flex; flex-direction:column; gap:8px; transition:background .15s; border-radius:12px; padding:4px; }
.pb-kb__drop.is-hover { background:#EEECFD; }
.pb-kb__card {
  background:#fff; border-radius:12px; padding:12px;
  cursor:grab;
  box-shadow:0 1px 3px rgba(15,23,41,.05);
  transition:transform .12s, box-shadow .12s, opacity .15s;
  user-select:none;
}
.pb-kb__card:hover { transform:translateY(-1px); box-shadow:0 6px 16px rgba(15,23,41,.08); }
.pb-kb__card.is-dragging { opacity:.35; transform:rotate(2deg); cursor:grabbing; }
.pb-kb__card-head { display:flex; justify-content:space-between; align-items:center; gap:6px; margin-bottom:8px; }
.pb-kb__subj { font-size:10px; font-weight:800; letter-spacing:.05em; text-transform:uppercase; color:var(--accent, var(--pb-primary)); }
.pb-kb__title { display:block; font-weight:700; color:#0F1729; font-size:14px; line-height:1.35; margin-bottom:6px; text-decoration:none; letter-spacing:-0.005em; }
.pb-kb__title:hover { color:var(--pb-primary); }
.pb-kb__chapter { font-size:11.5px; color:#64748B; margin-bottom:6px; }
.pb-kb__due { font-size:11.5px; font-weight:700; color:#64748B; padding:3px 8px; border-radius:6px; background:#F1F5F9; display:inline-block; }
.pb-kb__due.is-today   { background:#FEF4E2; color:#92400E; }
.pb-kb__due.is-overdue { background:#FEE2E2; color:#991B1B; }
.pb-kb__empty { text-align:center; padding:24px 12px; color:#94A3B8; font-size:12.5px; font-style:italic; border:1.5px dashed #CBD5E1; border-radius:10px; }
/* Nav: Assignments CRM pill */
.nav__link--crm {
  background: linear-gradient(135deg,#10B981 0%,#059669 120%);
  color: #fff !important;
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: -0.01em;
  box-shadow: 0 4px 14px rgba(16,185,129,.28);
  transition: transform .12s ease, box-shadow .12s ease;
  margin-left: 6px;
}
.nav__link--crm:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(16,185,129,.35); text-decoration: none; }
.nav__link--crm.is-active { box-shadow: 0 0 0 3px rgba(16,185,129,.25); }
/* ════════════════════════════════════════════════════════════
   PadhloBro — Chapter Tests
   ════════════════════════════════════════════════════════════ */

/* Tests index — grid of chapter cards */
.pb-tests-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(240px, 1fr));
  gap:12px;
}
.pb-tests-grid--large { grid-template-columns:repeat(auto-fill, minmax(300px, 1fr)); }
.pb-tests-card {
  display:block;
  background:#fff;
  border:1.5px solid #EEF1F6;
  border-radius:16px;
  padding:16px 18px;
  text-decoration:none;
  color:inherit;
  transition:transform .12s, box-shadow .12s;
}
.pb-tests-card:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(15,23,41,.08); text-decoration:none; }
.pb-tests-card.is-locked { opacity:.6; cursor:not-allowed; }
.pb-tests-card.is-locked:hover { transform:none; box-shadow:none; }
.pb-tests-card__head { display:flex; justify-content:space-between; align-items:center; margin-bottom:8px; }
.pb-tests-card__num { font-size:11px; font-weight:800; letter-spacing:.05em; color:#64748B; text-transform:uppercase; }
.pb-tests-card__badge { font-size:10px; font-weight:800; letter-spacing:.05em; text-transform:uppercase; background:#E7F8F1; color:#065F46; padding:3px 8px; border-radius:999px; }
.pb-tests-card__badge--wait { background:#F1F5F9; color:#64748B; }
.pb-tests-card__title { font-weight:700; color:#0F1729; font-size:15px; line-height:1.35; margin:0 0 6px; }
.pb-tests-card__meta { font-size:12.5px; color:#64748B; }

/* Chapter tests view — 3 sets */
.pb-test-set {
  background:#fff;
  border:1.5px solid #EEF1F6;
  border-radius:18px;
  padding:22px;
  transition:transform .12s, box-shadow .12s;
}
.pb-test-set:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(15,23,41,.08); }
.pb-test-set.is-done { border-color:#A7F3D0; background:linear-gradient(180deg,#F0FDF4,#fff); }
.pb-test-set__head { display:flex; justify-content:space-between; align-items:center; margin-bottom:10px; }
.pb-test-set__label { font-size:11px; font-weight:800; letter-spacing:.08em; text-transform:uppercase; color:#5B4BE0; background:#EEECFD; padding:4px 10px; border-radius:999px; }
.pb-test-set__best { font-size:12px; font-weight:700; color:#065F46; background:#E7F8F1; padding:3px 8px; border-radius:8px; }
.pb-test-set__meta { font-size:13px; color:#64748B; margin-bottom:14px; display:flex; gap:6px; flex-wrap:wrap; }
.pb-test-set__attempts { font-size:12px; color:#5B4BE0; font-weight:600; margin-bottom:12px; }
.pb-test-set__actions { display:flex; gap:8px; flex-wrap:wrap; }
.pb-tests-note { margin-top:32px; padding:16px 20px; background:#F8FAFC; border-radius:14px; font-size:13px; color:#475569; line-height:1.6; }
.pb-tests-note p { margin:6px 0; }

/* Digital test view */
.pb-test-timer {
  font-family:'JetBrains Mono', ui-monospace, monospace;
  font-size:22px;
  font-weight:800;
  color:#5B4BE0;
  background:#EEECFD;
  padding:8px 18px;
  border-radius:12px;
  letter-spacing:.05em;
}
.pb-test-timer.is-low { background:#FEE2E2; color:#991B1B; animation:pbPulse 1.5s ease-in-out infinite; }

.pb-test-layout { display:grid; grid-template-columns:200px 1fr; gap:24px; align-items:start; }
@media (max-width:820px) { .pb-test-layout { grid-template-columns:1fr; } }

.pb-test-nav { position:sticky; top:16px; background:#fff; border:1.5px solid #EEF1F6; border-radius:16px; padding:16px; }
.pb-test-nav__title { font-size:12px; font-weight:800; letter-spacing:.05em; text-transform:uppercase; color:#64748B; margin-bottom:12px; }
.pb-test-nav__grid { display:grid; grid-template-columns:repeat(4, 1fr); gap:6px; }
.pb-test-nav__btn { padding:8px 0; font-size:12px; font-weight:700; background:#F8FAFC; border:1.5px solid #E6E8F0; border-radius:8px; cursor:pointer; color:#64748B; transition:all .12s; }
.pb-test-nav__btn:hover { border-color:#CBD5E1; }
.pb-test-nav__btn.is-answered { background:#E7F8F1; color:#065F46; border-color:#A7F3D0; }
.pb-test-nav__legend { margin-top:14px; font-size:11.5px; color:#64748B; }
.pb-test-nav__legend div { display:flex; align-items:center; gap:6px; margin:4px 0; }
.pb-test-nav__legend .dot { width:10px; height:10px; border-radius:3px; display:inline-block; }
.dot--answered { background:#A7F3D0; }
.dot--marked { background:#FDE68A; }

.pb-test-main { display:flex; flex-direction:column; gap:24px; }
.pb-test-section { background:#fff; border:1.5px solid #EEF1F6; border-radius:18px; padding:24px; }
.pb-test-section__head { font-size:13px; font-weight:800; letter-spacing:.12em; text-transform:uppercase; color:#0F1729; padding-bottom:12px; border-bottom:1px solid #EEF1F6; margin-bottom:20px; }

.pb-test-q { margin-bottom:28px; padding-bottom:24px; border-bottom:1px dashed #E6E8F0; }
.pb-test-q:last-child { margin-bottom:0; padding-bottom:0; border-bottom:none; }
.pb-test-q__head { display:flex; justify-content:space-between; align-items:center; margin-bottom:8px; }
.pb-test-q__num { font-weight:800; color:#0F1729; font-size:14px; }
.pb-test-q__marks { font-size:12px; font-weight:700; color:#5B4BE0; }
.pb-test-q__prompt { font-size:14.5px; line-height:1.6; color:#0F1729; margin-bottom:12px; }

.pb-test-q__opts { display:grid; gap:8px; }
.pb-test-opt {
  display:flex; align-items:flex-start; gap:10px;
  padding:11px 14px;
  background:#F8FAFC;
  border:1.5px solid #E6E8F0;
  border-radius:11px;
  cursor:pointer;
  font-size:14px;
  text-align:left;
  font-family:inherit;
  transition:all .12s;
}
.pb-test-opt:hover { border-color:#CBD5E1; }
.pb-test-opt.is-selected { background:#EEECFD; border-color:#5B4BE0; }
.pb-test-q__input { width:100%; padding:12px 14px; border:1.5px solid #D6DBE5; border-radius:11px; font-size:14px; font-family:inherit; line-height:1.5; resize:vertical; }
.pb-test-q__input:focus { outline:none; border-color:#5B4BE0; box-shadow:0 0 0 3px rgba(91,75,224,.10); }

.pb-test-submit { padding:24px; background:#F8FAFC; border-radius:16px; display:flex; gap:12px; align-items:center; justify-content:flex-end; flex-wrap:wrap; }

/* Result view */
.pb-result-hero { display:flex; gap:32px; align-items:center; padding:28px; background:linear-gradient(135deg,#F4F1FF,#FFF); border-radius:20px; margin-bottom:20px; flex-wrap:wrap; }
.pb-result-hero__ring { width:140px; height:140px; border-radius:50%; background:conic-gradient(#5B4BE0 calc(var(--pct) * 1%), #E6E8F0 0); display:grid; place-items:center; position:relative; flex-shrink:0; }
.pb-result-hero__ring::before { content:""; position:absolute; inset:12px; background:#fff; border-radius:50%; }
.pb-result-hero__pct { position:relative; font-size:34px; font-weight:800; color:#0F1729; letter-spacing:-0.02em; }
.pb-result-hero__sub { position:absolute; bottom:22px; font-size:11px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; color:#64748B; }
.pb-result-hero__marks { font-size:22px; color:#0F1729; margin-bottom:8px; }
.pb-result-hero__marks strong { font-weight:800; color:#5B4BE0; }
.pb-result-hero__msg { font-size:15px; font-weight:600; margin-bottom:8px; }
.pb-result-hero__meta { font-size:12.5px; color:#64748B; }

.pb-result-note { padding:14px 18px; background:#FEF4E2; border-radius:12px; font-size:13px; color:#92400E; margin-bottom:20px; }

.pb-result-sections { display:grid; grid-template-columns:repeat(auto-fill, minmax(140px, 1fr)); gap:12px; }
.pb-result-sec { background:#fff; border:1.5px solid #EEF1F6; border-radius:12px; padding:14px 16px; }
.pb-result-sec__label { font-size:12px; font-weight:800; color:#0F1729; letter-spacing:.05em; text-transform:uppercase; margin-bottom:4px; }
.pb-result-sec__max { font-size:13px; color:#64748B; }

.pb-weak-list { display:flex; gap:8px; flex-wrap:wrap; }
.pb-weak-chip { padding:6px 14px; background:#FEE2E2; color:#991B1B; border-radius:999px; font-size:13px; font-weight:600; }
.pb-result-reco { margin-top:16px; padding:14px 18px; background:#FEF4E2; border-radius:12px; font-size:13px; color:#92400E; }

.pb-result-q { padding:20px; background:#fff; border:1.5px solid #EEF1F6; border-radius:14px; margin-bottom:12px; }
.pb-result-q.is-correct { border-color:#A7F3D0; }
.pb-result-q.is-wrong { border-color:#FCA5A5; background:#FEF2F2; }
.pb-result-q__head { display:flex; gap:10px; align-items:center; margin-bottom:10px; flex-wrap:wrap; }
.pb-result-q__num { font-weight:800; color:#0F1729; font-size:14px; }
.pb-result-q__marks { font-size:12px; color:#64748B; }
.pb-result-q__verdict { margin-left:auto; font-size:12px; font-weight:800; letter-spacing:.05em; text-transform:uppercase; padding:3px 10px; border-radius:999px; }
.pb-result-q__verdict.is-ok { background:#E7F8F1; color:#065F46; }
.pb-result-q__verdict.is-no { background:#FEE2E2; color:#991B1B; }
.pb-result-q__prompt { font-size:14px; line-height:1.6; color:#0F1729; margin-bottom:10px; }
.pb-result-q__opts { display:grid; gap:6px; }
.pb-result-q__opt { padding:9px 12px; border-radius:9px; background:#F8FAFC; font-size:13.5px; border:1.5px solid #E6E8F0; position:relative; }
.pb-result-q__opt.is-correct { background:#E7F8F1; border-color:#A7F3D0; }
.pb-result-q__opt.is-wrong { background:#FEE2E2; border-color:#FCA5A5; }
.pb-result-q__opt .tag { font-size:10px; font-weight:800; letter-spacing:.05em; text-transform:uppercase; margin-left:8px; color:#64748B; }
.pb-result-q__opt .tag--correct { color:#065F46; }
.pb-result-q__student { margin-top:10px; padding:10px 14px; background:#F8FAFC; border-radius:10px; }
.pb-result-q__label { font-size:11px; font-weight:800; letter-spacing:.05em; text-transform:uppercase; color:#64748B; margin-bottom:4px; }
.pb-result-q__text { font-size:13.5px; color:#0F1729; white-space:pre-wrap; }
.pb-result-q__reveal { margin-top:10px; }
.pb-result-q__reveal summary { cursor:pointer; font-size:13px; font-weight:700; color:#5B4BE0; }
.pb-result-q__ans { margin-top:8px; padding:12px 14px; background:#F8FAFC; border-radius:10px; font-size:13.5px; line-height:1.55; color:#0F1729; }
.pb-result-q__scheme { margin-top:8px; font-size:12.5px; color:#64748B; padding:8px 12px; background:#FEF4E2; border-radius:8px; }
/* Nav: Tests pill */
.nav__link--tests {
  background: linear-gradient(135deg,#EF4444 0%,#DC2626 120%);
  color: #fff !important;
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: -0.01em;
  box-shadow: 0 4px 14px rgba(239,68,68,.28);
  transition: transform .12s ease, box-shadow .12s ease;
  margin-left: 6px;
}
.nav__link--tests:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(239,68,68,.35); text-decoration: none; }
.nav__link--tests.is-active { box-shadow: 0 0 0 3px rgba(239,68,68,.25); }