/* ============ Public site styles ============ */
:root{
  --p:#0E7C66; --acc:#F59E0B;
  --p-dark:color-mix(in srgb,var(--p) 78%,#000);
  --p-soft:color-mix(in srgb,var(--p) 10%,#fff);
  --p-soft2:color-mix(in srgb,var(--p) 18%,#fff);
  --bg:#F5F8F7; --card:#fff; --text:#13231F; --muted:#5B6B67; --border:#E2EAE7;
  --ok:#059669; --ok-soft:#E3F7EE; --bad:#DC2626; --bad-soft:#FDECEC; --warn:#B45309; --warn-soft:#FEF3C7;
  --r:14px; --shadow:0 1px 2px rgba(16,40,34,.05),0 6px 20px rgba(16,40,34,.06);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;overflow-x:hidden;font-family:'Hind Siliguri',system-ui,-apple-system,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--p);text-decoration:none}
a:hover{color:var(--p-dark)}
h1,h2,h3,h4{line-height:1.3;margin:0 0 .5em}
p{margin:0 0 1em}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
.muted{color:var(--muted)} .small{font-size:14px} .xs{font-size:12.5px}
.center{text-align:center} .mt-0{margin-top:0}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:40px}.mb-0{margin-bottom:0}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}
.flex{display:flex;gap:12px;align-items:center}.between{justify-content:space-between}.wrap{flex-wrap:wrap}.grow{flex:1}
.hide-sm{} @media(max-width:760px){.hide-sm{display:none!important}}
.hide-lg{display:none} @media(max-width:760px){.hide-lg{display:initial}}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:10px;border:1.5px solid transparent;font:inherit;font-weight:600;font-size:15.5px;cursor:pointer;transition:.15s;white-space:nowrap;line-height:1.3}
.btn-primary{background:var(--p);color:#fff}.btn-primary:hover{background:var(--p-dark);color:#fff}
.btn-accent{background:var(--acc);color:#1f1300}.btn-accent:hover{filter:brightness(.95);color:#1f1300}
.btn-outline{border-color:var(--p);color:var(--p);background:#fff}.btn-outline:hover{background:var(--p-soft)}
.btn-ghost{background:transparent;color:var(--text)}.btn-ghost:hover{background:#0000000a}
.btn-light{background:#fff;color:var(--text);border-color:var(--border)}.btn-light:hover{border-color:var(--p);color:var(--p)}
.btn-danger{background:var(--bad);color:#fff}
.btn-sm{padding:6px 12px;font-size:14px;border-radius:8px}
.btn-lg{padding:13px 26px;font-size:17px;border-radius:12px}
.btn-block{width:100%}
.btn[disabled]{opacity:.55;cursor:not-allowed}

/* ---- badges ---- */
.badge{display:inline-flex;align-items:center;gap:4px;padding:2px 10px;border-radius:99px;font-size:12.5px;font-weight:600;background:#eef2f1;color:var(--muted)}
.badge-success{background:var(--ok-soft);color:var(--ok)}.badge-danger{background:var(--bad-soft);color:var(--bad)}
.badge-warning{background:var(--warn-soft);color:var(--warn)}.badge-primary{background:var(--p-soft2);color:var(--p-dark)}
.badge-accent{background:var(--acc);color:#1f1300}.badge-muted{background:#eef2f1;color:var(--muted)}

/* ---- header ---- */
.topbar{background:var(--p-dark);color:#fff;font-size:13.5px}
.topbar .container{display:flex;justify-content:space-between;gap:12px;padding-top:6px;padding-bottom:6px}
.topbar a{color:#fff;opacity:.9}.topbar a:hover{opacity:1}
.topbar .flex{gap:16px}
.header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:40}
.header .container{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--text)}
.brand img{height:42px;width:auto}
.brand span{white-space:nowrap}
.nav{display:flex;gap:2px;margin-left:auto;align-items:center}
.nav>a,.nav .dd>a{padding:8px 12px;border-radius:8px;color:var(--text);font-weight:500;font-size:15.5px;display:flex;align-items:center;gap:6px}
.nav>a:hover,.nav .dd:hover>a,.nav a.active{background:var(--p-soft);color:var(--p-dark)}
.dd{position:relative}
.dd-menu{position:absolute;top:100%;left:0;min-width:220px;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);padding:6px;display:none;z-index:50}
.dd:hover .dd-menu,.dd:focus-within .dd-menu{display:block}
.dd-menu a{display:flex;gap:10px;align-items:center;padding:9px 12px;border-radius:8px;color:var(--text)}
.dd-menu a:hover{background:var(--p-soft)}
.dd-menu i{width:18px;color:var(--p);text-align:center}
.header-actions{display:flex;gap:8px;align-items:center}
.menu-btn{display:none;background:none;border:0;font-size:22px;padding:8px;cursor:pointer;color:var(--text)}
@media(max-width:1020px){
  .nav{position:fixed;inset:0 0 0 auto;width:min(320px,86vw);background:#fff;flex-direction:column;align-items:stretch;padding:70px 14px 20px;transform:translateX(100%);transition:.25s;visibility:hidden;overflow:auto;margin:0;z-index:60}
  .nav.open{transform:none;visibility:visible;box-shadow:-10px 0 30px #0002}
  .nav .dd-menu{position:static;display:block;box-shadow:none;border:0;padding:0 0 0 12px}
  .menu-btn{display:block}
  .header-actions{margin-left:auto}
  .nav-close{display:block!important;position:absolute;top:14px;right:14px}
  .header .btn-hide-sm{display:none}
}
.nav-close{display:none}
.overlay{position:fixed;inset:0;background:#0006;z-index:55;display:none}
.overlay.show{display:block}

/* ---- alerts ---- */
.alerts{position:fixed;top:78px;right:16px;z-index:100;display:flex;flex-direction:column;gap:8px;max-width:min(420px,calc(100vw - 32px))}
.alert{padding:12px 16px;border-radius:12px;background:#fff;box-shadow:var(--shadow);border-left:4px solid var(--p);font-weight:500;display:flex;gap:10px;align-items:flex-start}
.alert-success{border-color:var(--ok)}.alert-error{border-color:var(--bad)}.alert-info{border-color:#2563EB}.alert-warning{border-color:var(--acc)}
.alert-inline{position:static;box-shadow:none;border:1px solid var(--border);border-left-width:4px}

/* ---- sections / cards ---- */
.section{padding:48px 0}
.section-sm{padding:28px 0}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;margin-bottom:22px;flex-wrap:wrap}
.section-head h2{font-size:26px;margin:0}
.section-head p{margin:4px 0 0;color:var(--muted)}
.eyebrow{display:inline-block;color:var(--p);font-weight:700;font-size:14px;letter-spacing:.3px;margin-bottom:4px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow)}
.card-body{padding:20px}
.card-title{font-size:18px;font-weight:700;margin:0 0 10px}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}.g5{grid-template-columns:repeat(5,1fr)}.g6{grid-template-columns:repeat(6,1fr)}
@media(max-width:1020px){.g4,.g5,.g6{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.g3,.g4,.g5{grid-template-columns:repeat(2,1fr)}.g6{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:1fr}.grid{gap:12px}}
@media(max-width:420px){.g3.sm-1,.g4.sm-1,.g2{grid-template-columns:1fr}}
.page-head{background:linear-gradient(135deg,var(--p-dark),var(--p));color:#fff;padding:34px 0}
.page-head h1{margin:0;font-size:28px}
.page-head p{margin:6px 0 0;opacity:.9}
.crumbs{font-size:14px;opacity:.85;margin-bottom:6px}.crumbs a{color:#fff}

/* ---- hero ---- */
.hero{background:radial-gradient(1200px 400px at 90% -10%,color-mix(in srgb,var(--acc) 25%,transparent),transparent),linear-gradient(135deg,var(--p-dark),var(--p));color:#fff;padding:56px 0 64px;position:relative;overflow:hidden}
.hero .container{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}
.hero h1{font-size:40px;margin-bottom:14px}
.hero p.lead{font-size:18px;opacity:.92;max-width:560px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.hero .btn-outline{background:transparent;color:#fff;border-color:#ffffffaa}.hero .btn-outline:hover{background:#ffffff1a}
.hero-stats{display:flex;gap:28px;margin-top:30px;flex-wrap:wrap}
.hero-stats b{display:block;font-size:26px}
.hero-stats span{opacity:.85;font-size:14px}
.hero-panel{background:#ffffff14;border:1px solid #ffffff30;border-radius:20px;padding:18px;backdrop-filter:blur(6px)}
.hero-panel .quick{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.quick a{background:#fff;color:var(--text);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:8px;transition:.15s}
.quick a:hover{transform:translateY(-2px);color:var(--text)}
.quick i{font-size:22px;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--p-soft);color:var(--p)}
.quick b{font-size:16px}.quick small{color:var(--muted);line-height:1.35}
@media(max-width:900px){.hero .container{grid-template-columns:1fr}.hero h1{font-size:30px}.hero{padding:36px 0 40px}}

/* slider */
.slider{position:relative;border-radius:18px;overflow:hidden;aspect-ratio:16/7;background:#0002}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .6s}
.slide.on{opacity:1}
.slide img{width:100%;height:100%;object-fit:cover}
.slide .cap{position:absolute;left:0;right:0;bottom:0;padding:18px 20px;background:linear-gradient(transparent,#000a);color:#fff}
.slider .dots{position:absolute;bottom:10px;right:14px;display:flex;gap:6px}
.slider .dots button{width:9px;height:9px;border-radius:50%;border:0;background:#fff8;cursor:pointer;padding:0}
.slider .dots button.on{background:#fff;width:22px;border-radius:9px}

/* feature tiles */
.tile{display:flex;flex-direction:column;align-items:center;text-align:center;gap:10px;padding:22px 12px;border-radius:var(--r);background:#fff;border:1px solid var(--border);color:var(--text);transition:.15s}
.tile:hover{border-color:var(--p);transform:translateY(-3px);color:var(--text);box-shadow:var(--shadow)}
.tile .ic{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;font-size:24px;background:var(--p-soft);color:var(--p)}
.tile b{font-size:16px}
.tile small{color:var(--muted);line-height:1.35}

/* course card */
.c-card{display:flex;flex-direction:column;overflow:hidden;height:100%;transition:.15s}
.c-card:hover{transform:translateY(-3px)}
.c-thumb{aspect-ratio:16/9;background:linear-gradient(135deg,var(--p),var(--p-dark));position:relative;display:grid;place-items:center;color:#fff;overflow:hidden}
.c-thumb img{width:100%;height:100%;object-fit:cover}
.c-thumb .ph{font-size:20px;font-weight:700;padding:16px;text-align:center;line-height:1.35}
.c-thumb .badge{position:absolute;top:10px;left:10px}
.c-body{padding:14px 16px;display:flex;flex-direction:column;gap:8px;flex:1}
.c-body h3{font-size:17px;margin:0;line-height:1.4}
.c-body h3 a{color:var(--text)}
.c-meta{display:flex;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:13.5px}
.price{display:flex;align-items:baseline;gap:8px;margin-top:auto}
.price b{font-size:20px;color:var(--p-dark)}
.price s{color:var(--muted);font-size:14px}
.c-foot{padding:0 16px 16px;display:flex;gap:8px}
.c-foot .btn{flex:1}

/* job card */
.job{display:flex;gap:14px;padding:16px;align-items:flex-start;transition:.15s}
.job:hover{border-color:var(--p)}
.job .logo{width:56px;height:56px;border-radius:12px;background:var(--p-soft);display:grid;place-items:center;color:var(--p);font-size:22px;flex-shrink:0;overflow:hidden;border:1px solid var(--border)}
.job .logo img{width:100%;height:100%;object-fit:contain;background:#fff}
.job h3{font-size:17px;margin:0 0 4px;line-height:1.4}.job h3 a{color:var(--text)}
.job .org{color:var(--muted);font-size:14.5px}
.job .facts{display:flex;flex-wrap:wrap;gap:6px 16px;margin-top:8px;font-size:13.5px;color:var(--muted)}
.job .facts i{color:var(--p);margin-right:4px}
.deadline{font-weight:700;font-size:13px;padding:4px 10px;border-radius:8px;white-space:nowrap}
.dl-ok{background:var(--ok-soft);color:var(--ok)}.dl-soon{background:var(--warn-soft);color:var(--warn)}.dl-over{background:#eef2f1;color:var(--muted)}
.info-table{width:100%;border-collapse:collapse}
.info-table th,.info-table td{padding:11px 14px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}
.info-table th{width:36%;color:var(--muted);font-weight:600;background:#fafcfb}

/* tabs / chips */
.tabs{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{padding:8px 16px;border-radius:99px;background:#fff;border:1px solid var(--border);color:var(--text);font-weight:500;white-space:nowrap;font-size:15px}
.tab:hover{border-color:var(--p);color:var(--p)}
.tab.active{background:var(--p);border-color:var(--p);color:#fff}
.chip{display:inline-flex;gap:6px;align-items:center;padding:6px 12px;border-radius:10px;border:1px solid var(--border);background:#fff;cursor:pointer;font-size:14.5px;user-select:none}
.chip input{accent-color:var(--p)}
.chip:has(input:checked){border-color:var(--p);background:var(--p-soft);color:var(--p-dark);font-weight:600}

/* book card */
.b-card{display:flex;flex-direction:column;overflow:hidden;height:100%}
.b-cover{aspect-ratio:3/4;background:linear-gradient(160deg,var(--p-soft2),#fff);display:grid;place-items:center;overflow:hidden;position:relative}
.b-cover img{width:100%;height:100%;object-fit:cover}
.b-cover .ph{padding:18px;text-align:center;font-weight:700;color:var(--p-dark);font-size:17px;line-height:1.4}
.b-cover .ph i{display:block;font-size:34px;margin-bottom:8px;opacity:.6}
.b-body{padding:12px 14px 14px;display:flex;flex-direction:column;gap:6px;flex:1}
.b-body h3{font-size:16px;margin:0;line-height:1.4}.b-body h3 a{color:var(--text)}

/* forms */
.form-card{max-width:460px;margin:40px auto}
.field{margin-bottom:14px}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:15px}
.input,select.input,textarea.input{width:100%;padding:11px 13px;border:1.5px solid var(--border);border-radius:10px;font:inherit;background:#fff;color:var(--text);transition:.15s}
.input:focus{outline:0;border-color:var(--p);box-shadow:0 0 0 3px var(--p-soft2)}
textarea.input{min-height:110px;resize:vertical}
.help{font-size:13.5px;color:var(--muted);margin-top:4px}
.search-bar{display:flex;gap:8px}
.search-bar .input{flex:1}

/* tables */
.table-wrap{overflow-x:auto}
.table{width:100%;border-collapse:collapse;background:#fff}
.table th,.table td{padding:11px 14px;border-bottom:1px solid var(--border);text-align:left}
.table th{font-size:14px;color:var(--muted);font-weight:600;background:#fafcfb}

/* pager */
.pager{display:flex;gap:6px;justify-content:center;margin-top:26px;flex-wrap:wrap}
.pager a,.pager span{min-width:38px;height:38px;display:grid;place-items:center;border-radius:10px;background:#fff;border:1px solid var(--border);color:var(--text);padding:0 10px}
.pager .active{background:var(--p);color:#fff;border-color:var(--p)}

/* rich content */
.prose{font-size:17px;line-height:1.8}
.prose img{border-radius:10px;height:auto}
.prose h2,.prose h3{margin-top:1.3em}
.prose ul,.prose ol{padding-left:1.4em}
.prose table{border-collapse:collapse;width:100%}.prose td,.prose th{border:1px solid var(--border);padding:8px}

/* layout with sidebar */
.two-col{display:grid;grid-template-columns:1fr 340px;gap:24px;align-items:start}
@media(max-width:900px){.two-col{grid-template-columns:1fr}}
.sticky{position:sticky;top:84px}

/* empty */
.empty{text-align:center;padding:48px 16px;color:var(--muted)}
.empty i{font-size:42px;opacity:.35;margin-bottom:10px;display:block}

/* testimonials / faq */
.t-card{padding:20px}
.t-card .who{display:flex;gap:12px;align-items:center;margin-top:12px}
.t-card .who img,.avatar{width:46px;height:46px;border-radius:50%;object-fit:cover;background:var(--p-soft);display:grid;place-items:center;color:var(--p);font-weight:700;flex-shrink:0}
details.faq{background:#fff;border:1px solid var(--border);border-radius:12px;padding:0 18px;margin-bottom:10px}
details.faq summary{cursor:pointer;padding:15px 0;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:10px}
details.faq summary::after{content:'+';font-size:22px;color:var(--p);line-height:1}
details.faq[open] summary::after{content:'–'}
details.faq .ans{padding:0 0 16px;color:#34443f}

/* video */
.yt{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#000}
.yt iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* footer */
.footer{background:#0F1F1B;color:#c9d6d2;margin-top:60px;padding:48px 0 0}
.footer a{color:#c9d6d2}.footer a:hover{color:#fff}
.footer h4{color:#fff;font-size:17px;margin-bottom:14px}
.footer ul{list-style:none;padding:0;margin:0}.footer li{margin-bottom:8px}
.footer .fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px}
@media(max-width:860px){.footer .fgrid{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.footer .fgrid{grid-template-columns:1fr}}
.footer .social{display:flex;gap:10px;margin-top:14px}
.footer .social a{width:38px;height:38px;border-radius:10px;background:#ffffff14;display:grid;place-items:center}
.footer .bottom{border-top:1px solid #ffffff1a;margin-top:36px;padding:16px 0;font-size:14px;text-align:center}
.footer .brand{color:#fff}

/* stats strip */
.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stats-strip .s{background:#fff;border:1px solid var(--border);border-radius:var(--r);padding:18px;text-align:center}
.stats-strip b{display:block;font-size:28px;color:var(--p-dark)}
@media(max-width:760px){.stats-strip{grid-template-columns:repeat(2,1fr)}}

/* notice marquee */
.notice-bar{background:var(--warn-soft);border-bottom:1px solid #f6e3b0}
.notice-bar .container{display:flex;gap:12px;align-items:center;padding-top:8px;padding-bottom:8px;overflow:hidden}
.notice-bar .lbl{background:var(--acc);color:#1f1300;font-weight:700;padding:2px 10px;border-radius:6px;font-size:14px;flex-shrink:0}
.marquee{overflow:hidden;white-space:nowrap;flex:1}
.marquee span{display:inline-block;padding-left:100%;animation:mq 28s linear infinite}
.marquee a{color:#6b3b00;margin-right:40px}
@keyframes mq{to{transform:translateX(-100%)}}

/* ============ Practice area (self exam) ============ */
.px{display:grid;grid-template-columns:250px 1fr;gap:24px;align-items:start;padding-top:24px;padding-bottom:24px}
.px-side{position:sticky;top:84px;background:#fff;border:1px solid var(--border);border-radius:var(--r);padding:10px}
.px-side a{display:flex;gap:12px;align-items:center;padding:10px 12px;border-radius:10px;color:var(--text);font-weight:500}
.px-side a i{width:22px;text-align:center;color:var(--muted)}
.px-side a:hover{background:#f2f6f5}
.px-side a.active{background:var(--p-soft);color:var(--p-dark)}
.px-side a.active i{color:var(--p)}
.px-bottom{display:none}
@media(max-width:900px){
  .px{grid-template-columns:1fr;padding-bottom:80px}
  .px-side{display:none}
  .px-bottom{display:flex;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--border);z-index:45;justify-content:space-around;padding:6px 4px calc(6px + env(safe-area-inset-bottom))}
  .px-bottom a{display:flex;flex-direction:column;align-items:center;font-size:11.5px;color:var(--muted);gap:2px;padding:4px 6px;border-radius:8px}
  .px-bottom a i{font-size:18px}
  .px-bottom a.active{color:var(--p)}
}
.shortcut-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:10px}
.shortcut-row a{display:flex;flex-direction:column;align-items:center;gap:8px;padding:12px 6px;border-radius:12px;color:var(--text);font-weight:600;text-align:center;font-size:15px}
.shortcut-row a:hover{background:#f2f6f5}
.shortcut-row .ic{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;font-size:22px;color:#fff}
@media(max-width:480px){.shortcut-row .ic{width:44px;height:44px;font-size:19px}.shortcut-row a{font-size:13.5px}}
.streak{background:linear-gradient(135deg,var(--ok-soft),#fff);border:1px solid #cdeedd}
.week{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;text-align:center;font-size:12.5px;color:var(--muted)}
.week .d i{font-size:22px;color:#d7e4df;display:block;margin-bottom:2px}
.week .d.on i{color:#F97316}
.week .d.today{color:var(--p);font-weight:700}
.subj-list{display:flex;flex-direction:column;gap:10px}
.subj-row{display:flex;gap:12px;align-items:center}
.subj-row .ic{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:#fff;flex-shrink:0}
.bar{height:8px;background:#edf2f0;border-radius:9px;overflow:hidden}
.bar>span{display:block;height:100%;background:var(--p);border-radius:9px}
.subject-card{display:flex;gap:14px;align-items:center;padding:16px;color:var(--text)}
.subject-card:hover{border-color:var(--p);color:var(--text)}
.subject-card .ic{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;color:#fff;font-size:20px;flex-shrink:0}
.lb-row{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--border)}
.lb-rank{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;font-weight:700;background:#f1f5f4}
.lb-row.top1 .lb-rank{background:#FDE68A}.lb-row.top2 .lb-rank{background:#E5E7EB}.lb-row.top3 .lb-rank{background:#FED7AA}
.lb-row.me{background:var(--p-soft)}

/* ============ Exam / question UI ============ */
.exam-top{position:sticky;top:0;z-index:45;background:#fff;border-bottom:1px solid var(--border);box-shadow:0 2px 10px #0000000a}
.exam-top .container{display:flex;align-items:center;gap:14px;height:62px}
.timer{font-variant-numeric:tabular-nums;font-weight:700;font-size:20px;padding:6px 14px;border-radius:10px;background:var(--p-soft);color:var(--p-dark);display:flex;gap:8px;align-items:center}
.timer.low{background:var(--bad-soft);color:var(--bad);animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.6}}
.progress-mini{flex:1;max-width:320px}
.q-list{display:flex;flex-direction:column;gap:14px;max-width:820px;margin:22px auto 120px}
.q-card{background:#fff;border:1px solid var(--border);border-radius:var(--r);padding:18px 18px 14px}
.q-head{display:flex;gap:10px;align-items:flex-start;margin-bottom:12px}
.q-no{min-width:34px;height:34px;border-radius:10px;background:var(--p-soft);color:var(--p-dark);display:grid;place-items:center;font-weight:700;font-size:15px}
.q-text{font-size:17.5px;font-weight:600;line-height:1.55;flex:1;padding-top:3px}
.q-text img{margin-top:8px;border-radius:8px}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:640px){.opts{grid-template-columns:1fr}}
.opt{display:flex;gap:10px;align-items:center;padding:11px 12px;border:1.5px solid var(--border);border-radius:12px;cursor:pointer;transition:.12s;background:#fff;font-size:16px;line-height:1.45}
.opt:hover{border-color:var(--p)}
.opt input{position:absolute;opacity:0;pointer-events:none}
.opt .l{width:30px;height:30px;border-radius:50%;border:1.5px solid #b9c9c4;display:grid;place-items:center;font-weight:700;font-size:14px;flex-shrink:0;color:var(--muted)}
.opt.sel,.opt:has(input:checked){border-color:var(--p);background:var(--p-soft)}
.opt.sel .l,.opt:has(input:checked) .l{background:var(--p);border-color:var(--p);color:#fff}
.opt.right{border-color:var(--ok);background:var(--ok-soft)}.opt.right .l{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong{border-color:var(--bad);background:var(--bad-soft)}.opt.wrong .l{background:var(--bad);border-color:var(--bad);color:#fff}
.opt.locked{cursor:default}
.q-foot{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:12px;flex-wrap:wrap}
.expl{margin-top:12px;background:#f7faf9;border:1px dashed #cfe0da;border-radius:12px;padding:12px 14px;font-size:15.5px}
.expl b{color:var(--p-dark)}
.icon-btn{background:none;border:0;cursor:pointer;color:var(--muted);font-size:17px;padding:6px;border-radius:8px}
.icon-btn:hover{background:#f1f5f4}.icon-btn.on{color:var(--acc)}
.submit-bar{position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--border);z-index:44;padding:12px 0 calc(12px + env(safe-area-inset-bottom))}
.submit-bar .container{display:flex;align-items:center;gap:14px;justify-content:space-between;max-width:820px}
.palette{display:flex;flex-wrap:wrap;gap:6px}
.palette a{width:32px;height:32px;border-radius:8px;border:1px solid var(--border);display:grid;place-items:center;font-size:13px;color:var(--text);background:#fff}
.palette a.done{background:var(--p);color:#fff;border-color:var(--p)}
.palette a.ok{background:var(--ok);color:#fff;border-color:var(--ok)}.palette a.bad{background:var(--bad);color:#fff;border-color:var(--bad)}

/* result */
.score-ring{--v:0;width:150px;height:150px;border-radius:50%;background:conic-gradient(var(--p) calc(var(--v)*1%),#e6eeeb 0);display:grid;place-items:center;margin:0 auto}
.score-ring>div{width:118px;height:118px;border-radius:50%;background:#fff;display:grid;place-items:center;text-align:center;line-height:1.2}
.score-ring b{font-size:30px;color:var(--p-dark)}
.rs-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.rs-grid .s{padding:14px;border-radius:12px;text-align:center;background:#f6f9f8}
.rs-grid b{display:block;font-size:22px}
@media(max-width:560px){.rs-grid{grid-template-columns:repeat(2,1fr)}}

/* ============ E-book reader ============ */
.reader-body{background:#3b4441}
.reader-top{position:sticky;top:0;z-index:30;background:#1f2725;color:#fff;box-shadow:0 2px 10px #0004}
.reader-top .container{display:flex;align-items:center;gap:10px;height:56px;max-width:1400px}
.reader-top a,.reader-top button{color:#fff}
.reader-top .title{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}
.reader-top .ctrl{display:flex;gap:4px;align-items:center}
.reader-top .rb{background:#ffffff14;border:0;border-radius:8px;min-width:36px;height:36px;display:grid;place-items:center;cursor:pointer;font:inherit}
.reader-top .rb:hover{background:#ffffff26}
.reader-top input{width:56px;text-align:center;border-radius:8px;border:0;padding:6px;font:inherit}
.pages{display:flex;flex-direction:column;align-items:center;gap:16px;padding:20px 10px 60px;user-select:none;-webkit-user-select:none}
.page-wrap{position:relative;background:#fff;box-shadow:0 6px 24px #0006;max-width:100%}
.page-wrap canvas{display:block;max-width:100%;height:auto}
.page-wrap .pnum{position:absolute;bottom:-22px;left:0;right:0;text-align:center;color:#cfd8d5;font-size:12px}
.reader-loading{color:#fff;text-align:center;padding:60px 20px}
@media print{body.reader-body *{display:none!important}}

/* misc */
.pill-stat{display:flex;gap:8px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:12px;padding:10px 14px}
.kbd{font-family:monospace;background:#eef2f1;border-radius:6px;padding:1px 6px}
.divider{height:1px;background:var(--border);margin:18px 0}
.list-plain{list-style:none;padding:0;margin:0}
.list-plain li{padding:10px 0;border-bottom:1px solid var(--border)}
.list-plain li:last-child{border:0}
.lesson{display:flex;gap:12px;align-items:center;padding:12px 16px;border-bottom:1px solid var(--border);color:var(--text)}
.lesson:hover{background:#f7faf9;color:var(--text)}
.lesson .ic{width:36px;height:36px;border-radius:10px;background:var(--p-soft);color:var(--p);display:grid;place-items:center;flex-shrink:0}
.lesson.on{background:var(--p-soft)}
.pay-method{display:flex;gap:12px;align-items:center;padding:12px 14px;border:1.5px solid var(--border);border-radius:12px;cursor:pointer;background:#fff}
.pay-method:has(input:checked){border-color:var(--p);background:var(--p-soft)}
.pay-method input{accent-color:var(--p);width:18px;height:18px}
.pay-box{background:#fff8ec;border:1px dashed #f0c46b;border-radius:12px;padding:14px;white-space:pre-line}
.copy{cursor:pointer;border-bottom:1px dashed}