/* DF Academy. Layout: header + tabs; course pages use card grids; notes and tests open as focused reading views. */
:root{
  --bg:#f3f5f7; --surface:#ffffff; --sunk:#e8ecf0; --line:#d5dbe2;
  --ink:#16202b; --muted:#5b6876; --accent:#c8641a; --accent-ink:#ffffff; --navy:#1d3a57;
  --ok:#1f7a4d; --ok-bg:#e2f3ea; --bad:#b4342c; --bad-bg:#fae5e3; --warn:#8a5f00; --warn-bg:#fbf0d4;
  --env-bg:#e6eef6; --env-line:#1d3a57; --ana-bg:#f3f1ea; --ana-line:#8a7a4e; --tip-bg:#e6f3ec; --tip-line:#1f7a4d; --wbox-bg:#fbeae8; --wbox-line:#b4342c;
  --f-body:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif; --f-mono:Consolas,"Cascadia Mono",Menlo,monospace;
}
@media (prefers-color-scheme: dark){:root{
  --bg:#0f151c; --surface:#17202a; --sunk:#1f2a36; --line:#2c3a48;
  --ink:#e6ecf2; --muted:#9aa8b6; --accent:#ec8a3c; --accent-ink:#1a0f05; --navy:#9cc3ea;
  --ok:#5fd19a; --ok-bg:#163527; --bad:#ff8a80; --bad-bg:#3b1d1b; --warn:#f0c35a; --warn-bg:#3a2f14;
  --env-bg:#1b2a3a; --env-line:#9cc3ea; --ana-bg:#2a271e; --ana-line:#c9b47a; --tip-bg:#16301f; --tip-line:#5fd19a; --wbox-bg:#3b1d1b; --wbox-line:#ff8a80; color-scheme:dark}}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:15px/1.55 var(--f-body)}
a{color:var(--navy)}
.wrap{max-width:1180px;margin:0 auto;padding:20px 16px 60px}
h1,h2,h3{text-wrap:balance;margin:0;line-height:1.25}
.muted{color:var(--muted)} .mono{font-family:var(--f-mono);font-size:.9em}
[hidden]{display:none!important}
header.top{display:flex;flex-wrap:wrap;gap:12px 24px;align-items:flex-end;justify-content:space-between;border-bottom:2px solid var(--ink);padding-bottom:14px}
.eyebrow{font:600 12px/1 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.brand h1{font-size:28px;font-weight:800;margin-top:6px}
.who{display:flex;gap:10px;align-items:center;font-size:13px;color:var(--muted)}
.tabs{display:flex;gap:4px;flex-wrap:wrap;margin-top:14px}
.tabs a{font-weight:600;font-size:14px;border:1px solid var(--line);background:var(--surface);color:var(--ink);padding:7px 14px;border-radius:6px;text-decoration:none}
.tabs a[aria-current="page"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn{font:600 14px var(--f-body);border:1px solid var(--ink);background:var(--ink);color:var(--bg);padding:8px 14px;border-radius:6px;cursor:pointer;text-decoration:none;display:inline-block}
.btn.accent{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.danger{background:var(--bad);border-color:var(--bad);color:#fff}
.btn.sm{padding:5px 10px;font-size:13px}
.btn[disabled]{opacity:.45;cursor:not-allowed}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.banner{margin-top:16px;padding:12px 14px;border-radius:8px;background:var(--warn-bg);border:1px solid var(--line);font-size:14px}
.summary{display:grid;grid-template-columns:minmax(0,2fr) repeat(3,minmax(0,1fr));gap:12px;margin-top:20px}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin-top:20px}
.cell{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:14px 16px;min-width:0}
.k{font:600 11px var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.v{font-weight:700;font-size:24px;margin-top:4px;font-variant-numeric:tabular-nums}
.bar{height:8px;background:var(--sunk);border-radius:4px;overflow:hidden;margin-top:10px}
.bar>i{display:block;height:100%;background:var(--accent);width:0}
.month{margin-top:28px}
.month-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px;margin-bottom:10px}
.month-head h2{font-size:20px}
.weeks{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:12px}
.wk{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:14px;display:flex;flex-direction:column;gap:10px;min-width:0}
.wk.locked{opacity:.7}
.wk .num{font:12px var(--f-mono);color:var(--muted)}
.wk h3{font-size:16px;margin-top:2px}
.wk-foot{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:space-between;margin-top:auto;padding-top:10px;border-top:1px dashed var(--line)}
.pill{display:inline-flex;align-items:center;gap:4px;font:600 12px var(--f-mono);padding:3px 8px;border-radius:999px;white-space:nowrap}
.pill.ok{background:var(--ok-bg);color:var(--ok)} .pill.bad{background:var(--bad-bg);color:var(--bad)} .pill.none{background:var(--sunk);color:var(--muted)} .pill.warn{background:var(--warn-bg);color:var(--warn)}
.assess{background:var(--surface);border:1.5px solid var(--navy);border-radius:8px;padding:14px;margin-top:12px;display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;justify-content:space-between}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.between{justify-content:space-between}
/* Notes reader */
.reader{max-width:780px;margin:20px auto 0}
.reader-bar{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;padding-block:10px;border-bottom:1px solid var(--line);margin-bottom:8px}
.notes h1.title{font-size:30px;margin-top:10px}
.notes .subtitle{color:var(--muted);margin:6px 0 18px}
.notes h1{font-size:21px;margin:30px 0 8px;padding-bottom:6px;border-bottom:2px solid var(--accent);color:var(--navy)}
.notes h2{font-size:17px;margin:22px 0 6px;color:var(--navy)}
.notes p,.notes li{line-height:1.65}
.notes img{max-width:100%;height:auto;background:#fff;border:1px solid var(--line);border-radius:6px;padding:6px}
.notes table{border-collapse:collapse;width:100%;font-size:14px;margin:12px 0;display:block;overflow-x:auto}
.notes th,.notes td{border:1px solid var(--line);padding:6px 9px;text-align:left;vertical-align:top}
.notes th{background:var(--sunk)}
.notes code{font-family:var(--f-mono);font-size:.9em;background:var(--sunk);padding:1px 5px;border-radius:4px}
.notes pre{background:var(--sunk);padding:12px;border-radius:6px;overflow-x:auto}
.notes pre code{background:none;padding:0}
.box{border-left:5px solid;border-radius:6px;padding:4px 16px;margin:16px 0}
.box p{margin:10px 0}
.box.env{background:var(--env-bg);border-color:var(--env-line)}
.box.analogy{background:var(--ana-bg);border-color:var(--ana-line)}
.box.tip{background:var(--tip-bg);border-color:var(--tip-line)}
.box.warn{background:var(--wbox-bg);border-color:var(--wbox-line)}
.box.note{background:var(--sunk);border-color:var(--line)}
/* Test */
.q{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px;margin-top:12px}
.q .qn{font:12px var(--f-mono);color:var(--muted)}
.q p.qt{margin:4px 0 10px;font-weight:600}
label.opt{display:flex;gap:10px;align-items:flex-start;padding:8px 10px;border:1px solid var(--line);border-radius:6px;margin-top:6px;cursor:pointer}
label.opt input{margin-top:4px}
label.opt.correct{border-color:var(--ok);background:var(--ok-bg)} label.opt.wrong{border-color:var(--bad);background:var(--bad-bg)}
.expl{margin-top:10px;font-size:14px;padding:8px 10px;background:var(--sunk);border-radius:6px}
.result{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:18px;margin-top:14px;display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center}
.score{font-weight:800;font-size:40px;font-variant-numeric:tabular-nums}
.score.ok{color:var(--ok)} .score.bad{color:var(--bad)}
.sticky{position:sticky;top:0;background:var(--bg);z-index:2}
/* Admin */
.tablebox{overflow-x:auto;margin-top:16px;background:var(--surface);border:1px solid var(--line);border-radius:8px}
table.grid{border-collapse:collapse;width:100%;font-size:13px}
.grid th,.grid td{padding:8px 6px;text-align:center;border-bottom:1px solid var(--line);white-space:nowrap;font-variant-numeric:tabular-nums}
.grid th{font:600 11px var(--f-mono);color:var(--muted);text-transform:uppercase;background:var(--sunk)}
.grid td.name,.grid th.name{text-align:left;padding-left:12px;position:sticky;left:0;background:var(--surface);min-width:180px}
.grid th.name{background:var(--sunk)}
.grid tr.click{cursor:pointer} .grid tr.click:hover td{background:var(--sunk)}
.sc{display:inline-block;min-width:36px;padding:2px 4px;border-radius:4px;font:600 12px var(--f-mono)}
.sc.ok{background:var(--ok-bg);color:var(--ok)} .sc.bad{background:var(--bad-bg);color:var(--bad)} .sc.none{color:var(--muted)}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px;margin-top:16px}
.panel h3{font-size:17px}
.miss{list-style:none;padding:0;margin:8px 0 0}
.miss li{padding:8px 0;border-bottom:1px solid var(--line);font-size:14px;display:flex;gap:10px}
.miss .cnt{font:700 13px var(--f-mono);color:var(--bad);min-width:28px}
form.f{display:grid;gap:10px}
.f label{display:grid;gap:4px;font-size:13px;font-weight:600}
.f input[type=text],.f input[type=password],.f input[type=email],.f input[type=date],.f input[type=number],.f textarea,.f select,select.f{font:14px var(--f-body);padding:7px 9px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--ink);width:100%}
.f textarea{min-height:70px}
textarea.md{min-height:60vh;font:13px/1.5 var(--f-mono)}
.editor{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;margin-top:12px}
.editor .preview{max-height:70vh;overflow:auto;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:0 18px}
.optrow{display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px;align-items:center}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:16px;background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:6px;font-size:14px;max-width:calc(100% - 32px);z-index:9}
.empty{padding:28px;text-align:center;color:var(--muted)}
@media (max-width:760px){.summary{grid-template-columns:1fr 1fr}.summary .cell:first-child{grid-column:1/-1}.editor{grid-template-columns:1fr}.brand h1{font-size:23px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* ---- LMS additions ---- */
a.home{color:inherit;text-decoration:none}
.page-title{font-size:24px;margin:18px 0 6px}
.section-title{font-size:17px;margin:22px 0 10px}
.crumbs{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:13px;margin-top:14px;color:var(--muted)}
.crumbs .sep{color:var(--line)}
.tabs.sub{margin-top:10px;border-bottom:1px solid var(--line);padding-bottom:10px}
.tabs.sub a{padding:5px 12px;font-size:13px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px;display:flex;flex-direction:column;gap:10px;min-width:0}
.card h3{font-size:17px} .card h3 a{color:inherit;text-decoration:none} .card h3 a:hover{text-decoration:underline}
.clamp{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.clamp1{display:inline-block;max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;vertical-align:bottom}
.small{font-size:13px}
.bad-text{color:var(--bad)}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.span2{grid-column:span 2}
.grow{flex:1 1 220px}
.f select,.f input[type=search]{font:14px var(--f-body);padding:7px 9px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--ink);width:100%}
select.f{width:auto}
.f-search{font:14px var(--f-body);padding:7px 9px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--ink);width:100%;max-width:420px;margin:12px 0 4px}
.picker{max-height:280px;overflow:auto;border:1px solid var(--line);border-radius:6px;padding:6px;margin:8px 0;background:var(--surface)}
.pick{display:flex;gap:8px;align-items:center;padding:5px 6px;border-radius:4px;font-size:14px;font-weight:400}
.pick:hover{background:var(--sunk)}
.filebtn{cursor:pointer}
details.panel summary{cursor:pointer}
details.panel[open] summary{margin-bottom:10px}
.q-edit{margin-top:12px}
.certificate{background:#fff;color:#16202b;border:10px double #1d3a57;border-radius:6px;max-width:820px;margin:24px auto;padding:56px 40px;text-align:center}
.certificate h1{font-size:34px;color:#1d3a57;margin:12px 0 22px}
.certificate .cert-name{font-size:30px;font-weight:700;margin:6px 0;border-bottom:1px solid #c8d0d8;display:inline-block;padding:0 24px 6px}
.certificate .cert-course{font-size:22px;font-weight:700;color:#c8641a;margin:6px 0 16px}
@media print{header.top,.tabs,.no-print,.toast{display:none!important}body{background:#fff}.certificate{margin:0 auto;border-width:8px}}
@media (max-width:760px){.span2{grid-column:auto}}
form.f.row,.f .row{display:flex;flex-wrap:wrap;align-items:flex-end;gap:10px}
.f label.row,label.row{display:flex;flex-direction:row;gap:8px;align-items:center;font-weight:600}
.f label.row input[type=checkbox]{width:auto;margin:0}
form.f.row > .btn{align-self:flex-end}

/* ---- Mobile-first additions: language, streak and badges, quiz cards, phone layout ---- */
html{-webkit-text-size-adjust:100%}
body{-webkit-tap-highlight-color:transparent}
button,a.btn,label.opt,.tabs a,select{touch-action:manipulation}
/* Hindi and Gujarati: use the phone's or PC's own fonts (nothing is downloaded) and a little more line height */
:root:lang(hi){--f-body:"Nirmala UI","Noto Sans Devanagari","Kohinoor Devanagari","Mangal","Lohit Devanagari","Segoe UI",system-ui,Roboto,Arial,sans-serif}
:root:lang(gu){--f-body:"Nirmala UI","Noto Sans Gujarati","Gujarati Sangam MN","Shruti","Lohit Gujarati","Segoe UI",system-ui,Roboto,Arial,sans-serif}
:root:lang(hi) body,:root:lang(gu) body{line-height:1.7}
.langsel{font:13px var(--f-body);padding:5px 8px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--ink);max-width:130px}
.langbar{gap:8px;flex-wrap:wrap}
.t-ico{display:none}
.btn.big{padding:13px 22px;font-size:16px;min-height:48px;border-radius:10px}
.full{flex:1 1 100%}
/* streak and badges */
.engage{display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin:6px 0 16px}
.streak{display:flex;gap:12px;align-items:center}
.flame{font-size:32px;filter:grayscale(1);opacity:.5}
.streak.on .flame{filter:none;opacity:1}
.s-num{font-weight:800;font-size:18px}
.badges{display:flex;flex-wrap:wrap;gap:8px}
.badge{display:flex;flex-direction:column;align-items:center;gap:3px;width:80px;text-align:center;font-size:11px;line-height:1.25}
.b-ico{font-size:24px;width:46px;height:46px;display:grid;place-items:center;border-radius:50%;background:var(--sunk)}
.badge.earned .b-ico{background:var(--ok-bg);box-shadow:0 0 0 2px var(--ok) inset}
.badge.locked{opacity:.55}
.badges.inline .badge{flex-direction:row;width:auto;gap:6px;font-size:13px}
.badges.inline .b-ico{width:32px;height:32px;font-size:18px}
/* quiz: one question per screen */
.qprog{height:8px;background:var(--sunk);border-radius:4px;overflow:hidden;margin:8px 0 4px}
.qprog>i{display:block;height:100%;background:var(--accent);width:0;transition:width .25s}
.qcard.busy{opacity:.7;pointer-events:none}
.qcard .qt{font-size:18px;line-height:1.5;margin-bottom:14px}
.qtitle{font-size:16px}
label.opt{min-height:52px;padding:13px 14px;font-size:16px;align-items:center}
label.opt input{width:20px;height:20px;margin:0;flex:none;accent-color:var(--accent)}
.expl.ok{background:var(--ok-bg)} .expl.bad{background:var(--bad-bg)}
.quizfoot{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;margin-top:14px;padding-bottom:6px}
.celebrate{font-size:44px;margin-left:auto;animation:pop .6s ease-out}
@keyframes pop{0%{transform:scale(.3);opacity:0}70%{transform:scale(1.2)}100%{transform:scale(1);opacity:1}}
@media (prefers-reduced-motion:reduce){.celebrate{animation:none}.qprog>i{transition:none}}
@media (display-mode:standalone){.wrap{padding-top:calc(12px + env(safe-area-inset-top))}}
@media (max-width:760px){
  .wrap{padding:12px 12px calc(88px + env(safe-area-inset-bottom))}
  header.top{padding-bottom:10px;gap:8px}
  .who{width:100%;flex-wrap:wrap;gap:8px}
  #whoName{flex:1 1 100%;font-size:12px}
  /* tabs become a bottom navigation bar, reachable with one thumb */
  .tabs{position:fixed;left:0;right:0;bottom:0;z-index:20;margin:0;gap:0;flex-wrap:nowrap;background:var(--surface);border-top:1px solid var(--line);padding:6px 6px calc(6px + env(safe-area-inset-bottom))}
  .tabs a{flex:1 1 0;display:flex;flex-direction:column;align-items:center;gap:2px;border:0;background:transparent;color:var(--muted);padding:6px 2px;font-size:11px;line-height:1.2;text-align:center;border-radius:8px;min-width:0}
  .tabs a[aria-current="page"]{background:var(--sunk);color:var(--ink)}
  .t-ico{display:block;font-size:20px}
  /* during a quiz the page chrome steps aside, so the question and answers get the whole screen */
  body:has(.quiz) .tabs,body:has(.quiz) header.top,body:has(.quiz) .quiz .crumbs{display:none}
  .quiz .reader-bar{padding-block:8px}
  .quiz .qcard{margin-bottom:8px}
  .toast{bottom:calc(80px + env(safe-area-inset-bottom))}
  /* bigger touch targets; 16px inputs stop iPhones zooming in */
  .btn{min-height:44px;padding:10px 16px;font-size:15px}
  .btn.sm{min-height:40px;padding:8px 12px;font-size:14px}
  .f input[type=text],.f input[type=password],.f input[type=email],.f input[type=date],.f input[type=number],.f textarea,.f select,.f-search{font-size:16px;padding:11px 12px}
  .langsel{font-size:14px;min-height:40px}
  .notes{font-size:16.5px}
  .notes p,.notes li{line-height:1.7}
  .notes h1.title{font-size:24px}
  .notes h1{font-size:20px}
  .reader{margin-top:8px}
  .reader-bar{gap:8px}
  .quiz .quizfoot{position:sticky;bottom:0;background:var(--bg);padding:10px 0 calc(10px + env(safe-area-inset-bottom));border-top:1px solid var(--line)}
  .quiz .quizfoot .btn.big{flex:1 1 auto}
  .engage{padding:12px}
  .badge{width:72px}
  .certificate{padding:28px 14px;border-width:6px;margin:12px auto}
  .certificate h1{font-size:26px}
  .certificate .cert-name{font-size:24px;padding:0 8px 6px}
  .page-title{font-size:21px}
  .cards{grid-template-columns:1fr}
}