/* Online safety training: course cards → start screen → learning-portal player (outline + slide + explanation tabs) → exam → result + score card.
   Every class starts with tr- so nothing collides with site.css. Colours come from the site tokens, so dark mode follows the site. */
.tr{--tr-g:var(--act);--tr-g-soft:var(--act-soft);--tr-line:var(--rule);--tr-red:var(--krishnachura);--tr-red-ink:var(--badge-fg);--tr-red-bg:var(--badge-bg);
  --tr-amber:#9A4A06;--tr-amber-bg:#FDF3E4;--tr-on-g:#fff;--tr-stage:#0F1A16;--tr-radius:14px;--tr-head:"Poppins","Noto Sans Bengali",var(--f-ui)}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .tr{--tr-on-g:#08130F;--tr-amber:#F2B35B;--tr-amber-bg:#2E2414;--tr-stage:#050B09}}
:root[data-theme="dark"] .tr{--tr-on-g:#08130F;--tr-amber:#F2B35B;--tr-amber-bg:#2E2414;--tr-stage:#050B09}
.tr [hidden]{display:none!important}
.tr .tr-en{font-family:var(--tr-head)}
:where(.tr) button{font:inherit;cursor:pointer;color:inherit}
.tr button:focus-visible,.tr a:focus-visible,.tr input:focus-visible,.tr summary:focus-visible{outline:3px solid var(--tr-red);outline-offset:2px}
.tr-view{display:grid;gap:18px;margin-top:12px;min-width:0}

/* course cards */
.tr-courses{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr));gap:20px;margin:8px 0 6px}
.tr-course{display:flex;flex-direction:column;text-decoration:none;color:var(--ink);background:var(--surface);border:1px solid var(--tr-line);border-top:4px solid var(--tr-red);border-radius:var(--tr-radius);overflow:hidden;transition:transform .15s ease,box-shadow .15s ease;min-width:0}
.tr-course:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.tr-course img{width:100%;height:auto;aspect-ratio:720/514;object-fit:cover;display:block;background:#004B3A}
.tr-course .tr-body{padding:16px 20px 20px;display:grid;gap:8px}
.tr-course h2,.tr-course h3{margin:0;font-size:1.2rem;line-height:1.35}
.tr-course p{margin:0;color:var(--slate);font-size:.95rem}
.tr-sub{color:var(--slate);font-size:.88rem}
.tr-pill{justify-self:start;font-size:.78rem;font-weight:700;color:var(--tr-red-ink);background:var(--tr-red-bg);padding:2px 10px;border-radius:99px}
.tr-meta{display:flex;gap:6px;flex-wrap:wrap}
.tr-meta span{font-size:.8rem;background:var(--tr-g-soft);color:var(--tr-g);border-radius:99px;padding:2px 10px;font-weight:600}
.tr-cta{justify-self:start;background:var(--tr-g);color:var(--tr-on-g);border-radius:10px;padding:8px 16px;font-weight:600}
.tr-resume{font-size:.85rem;color:var(--tr-amber);font-weight:600}
.tr-bar{height:8px;background:var(--tr-g-soft);border-radius:99px;overflow:hidden}
.tr-bar i{display:block;height:100%;background:var(--tr-g);width:0;transition:width .25s ease}
.tr-how{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:12px;margin:0;padding:0;list-style:none;counter-reset:s}
.tr-how li{background:var(--surface);border:1px solid var(--tr-line);border-radius:12px;padding:14px 16px;counter-increment:s;display:grid;gap:4px;font-size:.93rem;color:var(--slate)}
.tr-how li b{color:var(--ink);font-size:1rem}
.tr-how li b::before{content:counter(s) ". ";color:var(--tr-red-ink)}
.tr-home-card{position:relative}
.tr-home-card img{width:100%;aspect-ratio:720/514;object-fit:contain;background:#fff;border-radius:8px;border:1px solid var(--tr-line);margin-bottom:4px}

/* panels, buttons, fields */
.tr-panel{background:var(--surface);border:1px solid var(--tr-line);border-radius:var(--tr-radius);padding:20px;display:grid;gap:14px;min-width:0;align-content:start}
.tr-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.tr-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:0;border-radius:10px;padding:10px 18px;min-height:44px;font-weight:600;background:var(--tr-g);color:var(--tr-on-g);text-decoration:none}
.tr-btn.tr-ghost{background:transparent;color:var(--tr-g);border:1.5px solid var(--tr-g)}
.tr-btn.tr-red{background:var(--burnt);color:#fff}
.tr-btn.tr-sm{padding:6px 12px;min-height:36px;font-size:.9rem}
.tr-btn:disabled{opacity:.45;cursor:not-allowed}
.tr-hint{color:var(--slate);font-size:.9rem;margin:0}
.tr-err{color:var(--burnt);font-weight:600;margin:0}
:root[data-theme="dark"] .tr-err{color:var(--badge-fg)}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .tr-err{color:var(--badge-fg)}}
.tr-note{display:flex;gap:10px;align-items:flex-start;background:var(--tr-amber-bg);color:var(--ink);border-radius:10px;padding:10px 14px;font-size:.9rem}
.tr-note b{color:var(--tr-amber)}
.tr-setup{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:20px}
@media (max-width:860px){.tr-setup{grid-template-columns:1fr}}
.tr-setup h1{margin:0;font-size:clamp(1.35rem,3vw,1.85rem);line-height:1.3}
.tr-setup h2{margin:0;font-size:1.05rem}
.tr-langs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.tr-lang{border:2px solid var(--tr-line);background:var(--surface);border-radius:12px;padding:12px 14px;text-align:left;display:grid;gap:0}
.tr-lang b{font-size:1.2rem;font-family:var(--tr-head)}
.tr-lang span{font-size:.85rem;color:var(--slate)}
.tr-lang[aria-pressed="true"]{border-color:var(--tr-g);background:var(--tr-g-soft)}
.tr-fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,200px),1fr));gap:12px;align-items:end}
.tr-f{display:grid;gap:4px;font-size:.88rem;color:var(--slate);font-weight:600}
.tr-f input{font:inherit;font-weight:400;font-size:1rem;color:var(--ink);background:var(--surface);border:1px solid var(--field);border-radius:10px;padding:10px 12px;width:100%;min-width:0;min-height:44px}
.tr-what{display:grid;gap:8px;margin:0;padding:0;list-style:none}
.tr-what li{display:flex;gap:10px;align-items:flex-start}
.tr-what li::before{content:"";flex:none;width:8px;height:8px;border-radius:50%;background:var(--tr-g);margin-top:.65em}
.tr-toggle{display:inline-flex;border:1.5px solid var(--tr-g);border-radius:99px;overflow:hidden;flex:none}
.tr-toggle button{border:0;background:transparent;color:var(--tr-g);padding:5px 14px;font-weight:600;min-height:34px}
.tr-toggle button[aria-pressed="true"]{background:var(--tr-g);color:var(--tr-on-g)}

/* player */
.tr-player{background:var(--surface);border:1px solid var(--tr-line);border-radius:var(--tr-radius);overflow:hidden;display:grid;grid-template-rows:auto 1fr;min-width:0}
.tr-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:10px 14px;border-bottom:1px solid var(--tr-line)}
.tr-ttl{flex:1 1 220px;min-width:0;display:grid}
.tr-ttl b{font-size:1.02rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tr-ttl span{font-size:.82rem;color:var(--slate);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tr-pct{display:flex;align-items:center;gap:6px;font-size:.82rem;font-weight:600;color:var(--slate);font-variant-numeric:tabular-nums}
.tr-pct svg{width:34px;height:34px}
.tr-icon{border:1px solid var(--tr-line);background:var(--surface);border-radius:10px;width:40px;height:40px;display:grid;place-items:center;flex:none;padding:0}
.tr-icon svg{width:20px;height:20px}
.tr-pbody{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:0}
.tr-pbody.tr-closed{grid-template-columns:0 minmax(0,1fr)}
.tr-pbody.tr-closed .tr-outline{visibility:hidden}
@media (max-width:900px){.tr-pbody,.tr-pbody.tr-closed{grid-template-columns:1fr}.tr-outline{order:2;max-height:none;border-right:0;border-top:1px solid var(--tr-line)}.tr-pbody.tr-closed .tr-outline{display:none}}
.tr-outline{border-right:1px solid var(--tr-line);overflow-y:auto;max-height:80vh;background:var(--bg)}
.tr-olh{padding:12px 14px;display:grid;gap:6px;border-bottom:1px solid var(--tr-line);position:sticky;top:0;background:var(--bg);z-index:1}
.tr-olh b{font-size:.95rem}
.tr-mod{border-bottom:1px solid var(--tr-line)}
.tr-mod summary{list-style:none;cursor:pointer;padding:11px 14px;display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center}
.tr-mod summary::-webkit-details-marker{display:none}
.tr-num{font-family:var(--tr-head);font-weight:700;color:var(--tr-red-ink);font-size:.88rem}
.tr-mt{font-weight:600;font-size:.94rem;line-height:1.35}
.tr-mc{font-size:.76rem;color:var(--slate);font-variant-numeric:tabular-nums;white-space:nowrap}
.tr-mod.tr-done .tr-mc{color:var(--tr-g);font-weight:700}
.tr-mod ol{list-style:none;margin:0;padding:0 0 8px}
.tr-mod li button{width:100%;text-align:left;border:0;background:transparent;padding:7px 14px 7px 20px;display:grid;grid-template-columns:20px 1fr;gap:8px;font-size:.88rem;color:var(--slate);line-height:1.4}
.tr-mod li button:hover{background:var(--tr-g-soft)}
.tr-mod li button.tr-cur{background:var(--tr-g-soft);color:var(--ink);font-weight:600;box-shadow:inset 3px 0 0 var(--tr-g)}
.tr-ck{width:18px;height:18px;border-radius:50%;border:1.5px solid var(--field);display:grid;place-items:center;margin-top:1px}
.tr-ck.tr-on{background:var(--tr-g);border-color:var(--tr-g)}
.tr-ck.tr-on::after{content:"";width:8px;height:4px;border:2px solid var(--tr-on-g);border-top:0;border-right:0;transform:rotate(-45deg) translate(1px,-1px)}
.tr-exitem{margin:12px;border-radius:12px;padding:12px;display:grid;gap:6px;background:var(--surface);border:1.5px dashed var(--tr-line)}
.tr-exitem.tr-ready{border-style:solid;border-color:var(--burnt)}
.tr-main{display:grid;gap:12px;padding:14px;align-content:start;min-width:0}
.tr-stage{background:var(--tr-stage);border-radius:12px;padding:6px;position:relative}
.tr-stage img{width:100%;height:auto;aspect-ratio:16/9;object-fit:contain;display:block;border-radius:6px;background:#fff;transition:opacity .15s}
.tr-stage.tr-loading img{opacity:.35}
.tr-stage:fullscreen{display:grid;place-items:center;padding:0;border-radius:0}
.tr-stage:fullscreen img{max-height:100vh;width:auto;max-width:100vw}
.tr-fs{position:absolute;right:14px;bottom:14px;background:rgba(0,0,0,.55);color:#fff;border:0}
.tr-fsnav{display:none;position:absolute;top:50%;transform:translateY(-50%);width:52px;height:52px;border-radius:50%;background:rgba(0,0,0,.45);color:#fff;border:0}
.tr-fsnav svg{width:28px;height:28px}
.tr-fsprev{left:14px}.tr-fsnext{right:14px}
.tr-stage:fullscreen .tr-fsnav{display:grid}
.tr-fsnav:disabled{opacity:.3}
.tr-ctrl{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center}
.tr-ctrl .tr-mid{text-align:center;min-width:0;display:grid}
.tr-ctrl .tr-mid b{font-size:.98rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tr-ctrl .tr-mid span{font-size:.82rem;color:var(--slate);font-variant-numeric:tabular-nums}
@media (max-width:520px){.tr-ctrl{grid-template-columns:1fr 1fr}.tr-ctrl .tr-mid{grid-column:1/-1;grid-row:1}}
.tr-tabs{display:flex;gap:4px;border-bottom:1px solid var(--tr-line)}
.tr-tabs button{border:0;background:transparent;padding:8px 12px;font-weight:600;color:var(--slate);border-bottom:3px solid transparent;margin-bottom:-1px}
.tr-tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--tr-g)}
.tr-tabpanel{max-width:92ch;line-height:1.8;display:grid;gap:8px}
.tr-tabpanel p{margin:0}
.tr-kbd{font-size:.78rem;color:var(--slate)}
@media (hover:none){.tr-kbd{display:none}}

/* exam: one centred column on every screen */
.tr-exam,.tr-res{max-width:760px;margin:12px auto 0;width:100%;padding:clamp(18px,4vw,36px);gap:20px;box-shadow:0 10px 30px -18px rgba(0,40,30,.35)}
.tr-exh{display:grid;justify-items:center;gap:8px;text-align:center}
.tr-exh h2{margin:0;font-size:clamp(1.2rem,3vw,1.5rem)}
.tr-chips{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}
.tr-chips span{font-size:.8rem;font-weight:600;border-radius:99px;padding:3px 12px;background:var(--tr-g-soft);color:var(--tr-g)}
.tr-chips span.tr-warn{background:var(--tr-amber-bg);color:var(--tr-amber)}
.tr-qrun{display:grid;gap:18px}
.tr-qtop{display:grid;justify-items:center;gap:10px}
.tr-qnum{font-family:var(--tr-head);font-weight:700;font-size:.85rem;letter-spacing:.04em;text-transform:uppercase;color:var(--tr-g);background:var(--tr-g-soft);border-radius:99px;padding:4px 14px}
.tr-dots{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}
.tr-dots i{width:10px;height:10px;border-radius:50%;background:var(--tr-line);transition:background .2s,transform .2s}
.tr-dots i.tr-done{background:var(--tr-g);opacity:.45}
.tr-dots i.tr-now{background:var(--tr-g);transform:scale(1.35)}
.tr-qrun .tr-bar{height:6px}
.tr-qtext{font-size:clamp(1.15rem,2.6vw,1.5rem);font-weight:700;line-height:1.45;margin:0;text-align:center;text-wrap:balance}
.tr-opts{display:grid;gap:10px}
.tr-opt{display:flex;gap:14px;align-items:center;text-align:left;border:2px solid var(--tr-line);background:var(--surface);border-radius:14px;padding:14px 16px;min-height:60px;font-size:1rem;transition:border-color .15s,background .15s,transform .15s,box-shadow .15s}
@media (hover:hover){.tr-opt:hover{border-color:var(--tr-g);transform:translateY(-1px);box-shadow:0 6px 16px -10px rgba(0,40,30,.4)}}
.tr-opt .tr-k{flex:none;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--tr-g-soft);color:var(--tr-g);font-weight:700;font-family:var(--tr-head);transition:background .15s,color .15s}
.tr-opt[aria-pressed="true"]{border-color:var(--tr-g);background:var(--tr-g-soft)}
.tr-opt[aria-pressed="true"] .tr-k{background:var(--tr-g);color:var(--tr-on-g)}
.tr-qnav{display:grid;grid-template-columns:1fr 1fr;gap:10px;max-width:420px;width:100%;margin:0 auto}
.tr-qpass{text-align:center;margin:0}
.tr-center{text-align:center;display:grid;gap:14px;justify-items:center}
.tr-center h3{margin:0;font-size:clamp(1.15rem,2.6vw,1.4rem)}
.tr-rules{margin:0;padding:16px 18px 16px 2.2em;display:grid;gap:6px;text-align:left;background:var(--tr-g-soft);border-radius:12px;max-width:520px}

/* result */
.tr-hero{display:grid;justify-items:center;text-align:center;gap:10px}
.tr-score{position:relative;width:clamp(150px,36vw,190px);aspect-ratio:1;margin-bottom:4px}
.tr-score svg{width:100%;height:100%;transform:rotate(-90deg)}
.tr-score circle{fill:none;stroke-width:10}
.tr-sc-bg{stroke:var(--tr-g-soft)}
.tr-sc-fg{stroke:var(--tr-g);stroke-linecap:round;transition:stroke-dashoffset .9s cubic-bezier(.2,.8,.2,1)}
.tr-score.tr-fail .tr-sc-bg{stroke:var(--tr-red-bg)}.tr-score.tr-fail .tr-sc-fg{stroke:var(--tr-red)}
.tr-score div{position:absolute;inset:0;display:grid;place-content:center;justify-items:center}
.tr-score b{font-family:var(--tr-head);font-size:clamp(2rem,6vw,2.6rem);line-height:1}
.tr-score span{font-size:.85rem;color:var(--slate);margin-top:4px}
.tr-verdict{display:inline-block;font-weight:700;border-radius:99px;padding:4px 16px;font-size:.9rem;letter-spacing:.04em}
.tr-verdict.tr-pass{background:var(--tr-g-soft);color:var(--tr-g)}
.tr-verdict.tr-fail{background:var(--tr-red-bg);color:var(--tr-red-ink)}
.tr-hero h2{margin:0;font-size:clamp(1.3rem,3.4vw,1.7rem);text-wrap:balance}
.tr-hero p{margin:0}
.tr-hero .tr-hint{font-size:1rem}
.tr-acts{justify-content:center;margin-top:6px}
.tr-sharebox{display:grid;gap:12px;justify-items:center;text-align:center;border-top:1px solid var(--tr-line);padding-top:20px}
.tr-sharebox[hidden]{display:none}
.tr-card{width:100%}
.tr-card img{width:100%;height:auto;border-radius:12px;border:1px solid var(--tr-line);display:block;aspect-ratio:1200/630;background:var(--tr-g-soft);box-shadow:0 12px 28px -18px rgba(0,40,30,.5)}
.tr-share{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.tr-sharebox p{margin:0}
.tr-sbtn{display:inline-flex;align-items:center;gap:8px;border-radius:10px;padding:10px 16px;min-height:44px;font-weight:600;text-decoration:none;color:#fff;border:0}
.tr-sbtn svg{width:18px;height:18px;flex:none}
.tr-sbtn.tr-s-fb{background:#1877F2}.tr-sbtn.tr-s-li{background:#0A66C2}.tr-sbtn.tr-s-dl{background:var(--tr-g);color:var(--tr-on-g)}
.tr-caption{background:var(--tr-g-soft);border-radius:10px;padding:12px;font-size:.9rem;white-space:pre-wrap;overflow-wrap:anywhere;text-align:left;width:100%}
.tr-review{display:grid;gap:10px;border-top:1px solid var(--tr-line);padding-top:20px}
.tr-review[hidden]{display:none}
.tr-review h3{margin:0 0 4px;font-size:1.1rem;text-align:center}
.tr-review>div{background:var(--surface);border:1px solid var(--tr-line);border-left:4px solid var(--tr-red);border-radius:12px;padding:14px 16px;display:grid;gap:6px}
.tr-review .tr-rq{display:flex;gap:10px;align-items:flex-start;font-weight:700}
.tr-review .tr-rn{flex:none;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;background:var(--tr-red-bg);color:var(--tr-red-ink);font-size:.8rem;font-family:var(--tr-head)}
.tr-review .tr-ans{display:grid;grid-template-columns:auto 1fr;gap:4px 10px;align-items:baseline;padding-left:36px}
.tr-review .tr-why{padding-left:36px}
.tr-review .tr-no{color:var(--tr-red-ink);font-weight:600}
.tr-review .tr-yes{color:var(--tr-g);font-weight:600}
@media (max-width:520px){.tr-review .tr-ans,.tr-review .tr-why{padding-left:0}.tr-acts .tr-btn{flex:1 1 100%}.tr-share{display:grid;grid-template-columns:1fr;width:100%}.tr-sbtn{justify-content:center}}
.tr-small{font-size:.82rem;color:var(--slate)}
.tr-link{color:var(--link);font-weight:600}
.tr-scorepage{max-width:900px;margin:12px auto 0}
@media (prefers-reduced-motion:reduce){.tr *{transition:none!important}.tr-course:hover{transform:none}}