/* Biemann EduHub — Data Science Academy: embedded lab panes, DataSheet (spreadsheet), registration, exam and certificate */

/* ---------- Embedded lab pane inside a lesson ---------- */
.ds-pane{border-radius:18px;margin-top:4px}
.ds-pane .lc-main{border-top:0;grid-template-columns:minmax(0,1fr)}
@media (min-width:1360px){.ds-pane .lc-main{grid-template-columns:minmax(0,1.5fr) minmax(260px,1fr)}}
.ds-pane .lc-stage{padding:14px}
.ds-pane .lc-canvas{height:clamp(260px,42vw,400px)}
.ds-pane .lc-stagegrid.is-twin .lc-canvas{height:clamp(220px,32vw,330px)}
.ds-pane .tm-row b{color:#fff}.ds-pane .tm-row b.hl{color:#3FD8F7}.ds-pane .tm-row b.ok{color:#2EE59D}.ds-pane .tm-row b.warn{color:#FFB547}
.ds-pane .tm-big b{color:#fff}
.ds-ch{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.ds-ch li{display:grid;grid-template-columns:20px 1fr;gap:10px;align-items:start;padding:10px 12px;border-radius:12px;background:rgba(63,216,247,.06);border:1px solid rgba(63,216,247,.14);color:#D6EEFF;font:500 .86rem/1.45 var(--f-ui)}
.ds-ch li.h{display:flex;gap:8px;background:none;border:0;padding:2px 0;color:#7FDBF5;font:700 .7rem var(--f-ui);letter-spacing:.12em;text-transform:uppercase}
.ds-ch li .icon{width:18px;height:18px;color:#7FDBF5;margin-top:1px}
.ds-ch li.ok{border-color:rgba(46,229,157,.45);background:rgba(46,229,157,.1)}
.ds-ch li.ok .icon{color:#2EE59D}
.ds-ch code,.c-tasks code{font:600 .82em "JetBrains Mono",monospace;background:rgba(127,219,245,.14);padding:1px 6px;border-radius:6px}

/* ---------- Academy page ---------- */
.ds-hero .lab-hero-stats{margin-top:22px}
.ds-reg{display:grid;gap:12px}
.ds-reg .row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (max-width:520px){.ds-reg .row2{grid-template-columns:1fr}}
.ds-reg .field{display:grid;gap:4px}
.ds-reg .err{color:var(--bad);font:600 .78rem var(--f-ui);min-height:1em}
.ds-me{display:flex;gap:12px;align-items:center}
.ds-me .av{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--navy);color:#fff;font:700 .95rem var(--f-ui);flex:none}
.ds-me b{display:block}
.ds-me small{color:var(--ink-3);overflow-wrap:anywhere}
.ds-blocked{border:1px solid var(--bad);background:var(--bad-bg);color:var(--bad);border-radius:var(--r);padding:12px 14px;font:600 .86rem/1.5 var(--f-ui)}
.ds-modules{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.ds-modules span{display:inline-flex;gap:6px;align-items:center;padding:6px 12px;border-radius:999px;background:var(--paper);border:1px solid var(--line);font:600 .76rem var(--f-ui);color:var(--ink-2)}
.ds-modules .icon{width:15px;height:15px;color:var(--blue-ink)}

/* ---------- DataSheet section ---------- */
.ds-sheet-sec{padding:clamp(48px,6vw,96px) 0;background:var(--paper);border-bottom:1px solid var(--line)}
.ds-sets{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:18px 0 16px}
.ds-sets .sp{flex:1}
.ds-file{position:relative;overflow:hidden}
.ds-file input{position:absolute;inset:0;opacity:0;cursor:pointer}
.dsheet{border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;box-shadow:var(--sh-1);overflow:hidden;font-family:var(--f-ui)}
.ds-bar{display:flex;align-items:center;gap:0;border-bottom:1px solid var(--line);background:var(--ivory)}
.ds-ref{min-width:84px;padding:0 12px;height:40px;display:grid;place-items:center;font:700 .8rem "JetBrains Mono",monospace;color:var(--navy);border-right:1px solid var(--line)}
.ds-bar .fx{padding:0 10px;font:italic 700 .95rem Georgia,serif;color:var(--ink-3)}
.ds-fx{flex:1;min-width:0;height:40px;border:0;background:#fff;padding:0 12px;font:500 .9rem "JetBrains Mono",monospace;color:var(--ink);outline:none;border-left:1px solid var(--line)}
.ds-fx:focus{box-shadow:inset 0 0 0 2px var(--blue)}
.ds-main{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,1fr)}
@media (max-width:980px){.ds-main{grid-template-columns:minmax(0,1fr)}}
.ds-gridwrap{overflow:auto;max-height:560px;outline:none;position:relative}
.ds-gridwrap:focus-visible{box-shadow:inset 0 0 0 2px var(--blue)}
.ds-grid{border-collapse:separate;border-spacing:0;font:500 .8rem/1 "JetBrains Mono",monospace;min-width:100%}
.ds-grid th{position:sticky;top:0;z-index:2;background:var(--ivory-2,#F1EEE6);color:var(--ink-3);font:700 .72rem var(--f-ui);height:28px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);user-select:none}
.ds-grid th:first-child,.ds-grid tbody th{position:sticky;left:0;z-index:3;min-width:40px;width:40px}
.ds-grid tbody th{z-index:1;background:var(--ivory-2,#F1EEE6)}
.ds-grid thead th:first-child{z-index:4}
.ds-grid td{min-width:96px;max-width:200px;height:28px;padding:0 8px;border-right:1px solid #EDEAE2;border-bottom:1px solid #EDEAE2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;cursor:cell;color:var(--ink);background:#fff}
.ds-grid td.num{text-align:right}
.ds-grid td.fml{color:#0B5CAD;background:#F6FAFF}
.ds-grid td.err{color:var(--bad);background:#FFF4F4}
.ds-grid td.in{background:#E7F2FD}
.ds-grid td.sel{box-shadow:inset 0 0 0 2px var(--blue-ink);background:#EEF6FE}
.ds-grid tr:first-child td{font-weight:700}
.ds-side{border-left:1px solid var(--line);display:flex;flex-direction:column;min-width:0;background:#FBFAF7}
@media (max-width:980px){.ds-side{border-left:0;border-top:1px solid var(--line)}}
.ds-chartbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:10px 12px;border-bottom:1px solid var(--line)}
.ds-chartbar select{height:34px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:0 8px;font:600 .78rem var(--f-ui);color:var(--ink)}
.ds-chartbar label{display:inline-flex;gap:6px;align-items:center;font:700 .74rem var(--f-ui);color:var(--ink-3)}
.ds-chart{padding:10px}
.ds-chart canvas{display:block;width:100%;height:280px;border-radius:12px}
.ds-stats{padding:4px 14px 14px;font:500 .82rem/1.8 var(--f-ui);color:var(--ink-2)}
.ds-stats b{font:700 .8rem "JetBrains Mono",monospace;color:var(--navy)}
.ds-status{border-top:1px solid var(--line);padding:8px 12px;font:500 .76rem var(--f-ui);color:var(--ink-3);min-height:34px;background:var(--ivory)}
.ds-status b{color:var(--navy);font-family:"JetBrains Mono",monospace}
.ds-fnlist{margin-top:14px;font:500 .8rem/1.7 "JetBrains Mono",monospace;color:var(--ink-3)}

/* ---------- Final assessment CTA ---------- */
.ds-final{padding:clamp(48px,6vw,96px) 0;background:var(--navy-950,#020F1F);color:var(--on-dark,#EAF6FF)}
.ds-final .card{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);color:inherit}
.ds-final h2{color:#fff}
.ds-final .grid2{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:28px;align-items:center}
@media (max-width:900px){.ds-final .grid2{grid-template-columns:1fr}}
.ds-req{list-style:none;padding:0;margin:16px 0;display:grid;gap:8px}
.ds-req li{display:flex;gap:10px;align-items:center;font:600 .9rem var(--f-ui)}
.ds-req li .icon{color:#FFB547}
.ds-req li.ok .icon{color:#2EE59D}
.ds-cert-mini{aspect-ratio:1.414/1;border-radius:10px;background:#FBF7EC;border:10px solid #fff;box-shadow:0 30px 60px -30px rgba(0,0,0,.8);outline:2px solid #14274A;outline-offset:-18px;display:grid;place-items:center;text-align:center;color:#14274A;padding:30px;font-family:"Newsreader",Georgia,serif}
.ds-cert-mini small{letter-spacing:.3em;text-transform:uppercase;font:700 .6rem var(--f-ui);color:#8A6D2B}
.ds-cert-mini b{display:block;font:italic 600 1.5rem/1.2 "Newsreader",Georgia,serif;margin:8px 0}

/* ---------- Exam page ---------- */
body.exam-mode .masthead,body.exam-mode .foot,body.exam-mode .group-bar,body.exam-mode .util,body.exam-mode #cookie,body.exam-mode .assist,body.exam-mode .assist-fab,body.exam-mode .crumbs,body.exam-mode .skip{display:none!important}
body.exam-mode{background:var(--ivory)}
.ex-wrap{max-width:920px;margin:0 auto;padding:clamp(24px,4vw,56px) var(--gut,20px)}
.ex-warn{border:2px solid #C0122C;background:#FFF1F2;color:#9F0F24;border-radius:var(--r-lg);padding:20px 22px}
.ex-warn h2{color:#B3001B;font-size:1.25rem;display:flex;gap:10px;align-items:center}
.ex-warn h2 .icon{width:26px;height:26px}
.ex-warn p,.ex-warn li{font:600 .95rem/1.55 var(--f-ui);color:#9F0F24}
.ex-warn ul{margin:10px 0 0 18px}
.ex-warn strong{color:#B3001B}
.ex-ack{display:flex;gap:10px;align-items:flex-start;margin:18px 0;font:600 .92rem/1.5 var(--f-ui)}
.ex-ack input{width:20px;height:20px;margin-top:2px;accent-color:#B3001B}
.ex-top{position:sticky;top:0;z-index:20;display:flex;gap:12px;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--navy);color:#fff;border-radius:0 0 14px 14px}
.ex-top .live{display:inline-flex;gap:8px;align-items:center;font:700 .74rem var(--f-ui);letter-spacing:.08em;text-transform:uppercase;color:#FFB4BF}
.ex-top .live::before{content:"";width:9px;height:9px;border-radius:50%;background:#FF3D5A;box-shadow:0 0 0 0 rgba(255,61,90,.7);animation:exPulse 1.6s infinite}
@keyframes exPulse{70%{box-shadow:0 0 0 10px rgba(255,61,90,0)}100%{box-shadow:0 0 0 0 rgba(255,61,90,0)}}
.ex-timer{font:700 1.05rem "JetBrains Mono",monospace}
.ex-timer.low{color:#FFB547}
.ex-prog{height:6px;border-radius:9px;background:rgba(255,255,255,.18);flex:1;max-width:240px;overflow:hidden}
.ex-prog i{display:block;height:100%;background:#3FD8F7;width:0}
.ex-body{position:relative;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
.ex-body::after{content:attr(data-wm);position:fixed;inset:0;pointer-events:none;z-index:15;display:grid;place-items:center;font:700 clamp(14px,2.2vw,22px) var(--f-ui);color:rgba(20,39,74,.06);transform:rotate(-24deg);white-space:pre;line-height:3.2;text-align:center}
.ex-q{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;margin:16px 0}
.ex-q h3{font:700 1rem/1.5 var(--f-ui);color:var(--ink)}
.ex-q .num{font:700 .7rem var(--f-ui);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.ex-opts{display:grid;gap:8px;margin-top:12px}
.ex-opts label{display:flex;gap:10px;align-items:flex-start;padding:11px 14px;border:1px solid var(--line);border-radius:12px;cursor:pointer;font:500 .92rem/1.45 var(--f-ui)}
.ex-opts label:hover{border-color:var(--blue)}
.ex-opts input{margin-top:3px;accent-color:var(--navy)}
.ex-opts label:has(input:checked){border-color:var(--navy);background:var(--sky)}
.ex-nav{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}
.ex-nav button{width:36px;height:36px;border-radius:9px;border:1px solid var(--line);background:#fff;font:700 .78rem var(--f-ui);cursor:pointer}
.ex-nav button.ans{background:var(--navy);color:#fff;border-color:var(--navy)}
.ex-nav button.cur{outline:2px solid var(--blue);outline-offset:1px}
.ex-dq{position:fixed;inset:0;z-index:9999;background:#2A0008;color:#fff;display:grid;place-items:center;padding:24px;text-align:center}
.ex-dq .box{max-width:640px}
.ex-dq h2{color:#fff;font-size:clamp(1.6rem,4vw,2.4rem);margin:16px 0 10px}
.ex-dq .icon{width:64px;height:64px;color:#FF5470}
.ex-dq p{color:#FFD5DC;font:500 1rem/1.6 var(--f-ui)}
.ex-dq code{font:600 .85rem "JetBrains Mono",monospace;background:rgba(255,255,255,.1);padding:2px 8px;border-radius:6px}
.ex-blur .ex-body{filter:blur(14px)}
.ex-res{text-align:center}
.ex-score{font:700 clamp(3rem,9vw,5rem)/1 var(--f-display);color:var(--navy)}
@media print{body.exam-mode *{display:none!important}}

/* ---------- Certificate (HTML preview, mirrors the PDF) ---------- */
.cert{position:relative;width:100%;max-width:1000px;margin:24px auto;aspect-ratio:297/210;background:#FBF7EC;color:#14274A;font-family:"Newsreader",Georgia,"Times New Roman",serif;box-shadow:0 30px 70px -30px rgba(2,15,31,.5);container-type:inline-size;overflow:hidden}
.cert::before{content:"";position:absolute;inset:2.2%;border:.45cqw solid #14274A;pointer-events:none}
.cert::after{content:"";position:absolute;inset:3.3%;border:.12cqw solid #8A6D2B;pointer-events:none}
.cert-in{position:absolute;inset:6.2% 7% 4.6%;display:flex;flex-direction:column;align-items:center;text-align:center}
.cert-logo{height:6.5cqw;width:auto}
.cert-k{margin-top:1.4cqw;font:700 1.15cqw/1 var(--f-ui);letter-spacing:.45em;text-transform:uppercase;color:#8A6D2B}
.cert-t{margin-top:.8cqw;font:500 4.1cqw/1.05 "Newsreader",Georgia,serif;letter-spacing:.02em}
.cert-p{margin-top:1.6cqw;font:italic 400 1.6cqw/1.3 "Newsreader",Georgia,serif;color:#34466B}
.cert-n{margin-top:1cqw;font:italic 600 4.4cqw/1.1 "Newsreader",Georgia,serif;color:#0E1F3D;border-bottom:.1cqw solid #8A6D2B;padding:0 3cqw .6cqw}
.cert-c{margin-top:1.6cqw;font:500 1.5cqw/1.45 "Newsreader",Georgia,serif;max-width:74%}
.cert-c b{font-weight:700}
.cert-foot{margin-top:auto;width:100%;display:grid;grid-template-columns:1fr auto 1fr;align-items:end;gap:4cqw;padding:0 2cqw}
.cert-sig{border-top:.1cqw solid #14274A;padding-top:.6cqw;font:600 1.05cqw/1.4 var(--f-ui);letter-spacing:.06em;text-transform:uppercase;color:#34466B}
.cert-seal{width:10cqw;height:10cqw}
.cert-meta{margin-top:1.2cqw;font:500 .8cqw/1.45 var(--f-ui);color:#6B7690}
.cert-tools{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.ex-wrap .btn,.ds-final .btn{white-space:normal;height:auto;text-align:center;padding-top:10px;padding-bottom:10px;line-height:1.3}

/* ---------- Real-World Data Lab ---------- */
.rd-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.rd-chips a{display:inline-flex;gap:6px;align-items:center;padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);color:#fff;font:600 .82rem var(--f-ui);text-decoration:none}
.rd-chips a:hover{background:rgba(255,255,255,.16)}
.rd-chips .icon{width:16px;height:16px}
.rd-wrap{padding-top:clamp(36px,5vw,72px);padding-bottom:clamp(24px,4vw,48px)}
.rd-issue{padding:clamp(28px,4vw,56px) 0;border-bottom:1px solid var(--line);scroll-margin-top:90px}
.rd-issue:last-child{border-bottom:0}
.rd-head h2{margin-top:10px;max-width:820px}
.rd-head .lede{max-width:820px}
.rd-big{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:20px 0 22px}
.rd-big div{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px}
.rd-big b{display:block;font:700 clamp(1.3rem,2.6vw,1.9rem)/1.1 var(--f-display);color:var(--navy)}
.rd-big span{font:500 .8rem/1.4 var(--f-ui);color:var(--ink-3)}
@media (max-width:640px){.rd-big{grid-template-columns:1fr}}
.rd-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:22px;align-items:start}
@media (max-width:980px){.rd-grid{grid-template-columns:1fr}}
.rd-pane{border-radius:18px;display:grid;grid-template-columns:minmax(0,1fr)}
.rd-pane .lc-stage{padding:14px}
.rd-pane .lc-canvas{height:clamp(260px,38vw,380px)}
.rd-pane .rd-tm{margin:0 14px 14px}
.rd-pane .tm-row b{color:#fff}.rd-pane .tm-row b.hl{color:#3FD8F7}.rd-pane .tm-row b.ok{color:#2EE59D}.rd-pane .tm-row b.warn{color:#FFB547}
.rd-side h3{display:flex;gap:8px;align-items:center;font:700 1rem var(--f-ui);margin:4px 0 8px}
.rd-side h3 .icon{width:18px;height:18px;color:var(--blue-ink)}
.rd-side .rd-mean{margin-bottom:16px}
.rd-q{margin:0 0 16px 18px;display:grid;gap:6px;font:500 .92rem/1.5 var(--f-ui);color:var(--ink-2)}
.rd-src{display:flex;gap:8px;align-items:flex-start;font:500 .82rem/1.5 var(--f-ui);color:var(--ink-2);background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.rd-src .icon{width:16px;height:16px;flex:none;margin-top:2px;color:var(--blue-ink)}
.rd-note{font:500 .8rem/1.55 var(--f-ui);color:var(--ink-3);margin:10px 0 14px}
.rd-apps{display:flex;flex-wrap:wrap;gap:6px 14px;color:#D6EEFF;font:500 .82rem var(--f-ui)}
.rd-apps label{display:inline-flex;gap:6px;align-items:center;cursor:pointer}
.rd-apps small{color:#7FDBF5}
.rd-apps input{accent-color:#3FD8F7}

/* ---------- Account, teacher dashboard, admin ---------- */
.ac-wrap{max-width:820px}
.ac-card{padding:22px;margin-top:18px}
.ac-card h2{display:flex;gap:10px;align-items:center;font-size:1.25rem;margin-bottom:10px}
.ac-card h2 .icon{width:22px;height:22px;color:var(--blue-ink)}
.ac-form{display:grid;gap:12px}
.ac-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:560px){.ac-2{grid-template-columns:1fr}}
.ac-code{font:700 1.6rem "JetBrains Mono",monospace;letter-spacing:.4em;max-width:240px;text-align:center}
.ac-err{color:var(--bad);font:600 .84rem/1.5 var(--f-ui);min-height:1em;margin:0}
.ac-minor{border:1px solid var(--line);background:var(--sky,#EAF4FF);border-radius:var(--r);padding:12px 14px}
.ac-minor p{margin:0 0 8px;font-size:.9rem}
.ac-fs{border:1px solid var(--line);border-radius:var(--r);padding:10px 14px}
.ac-fs legend{font:700 .82rem var(--f-ui);padding:0 6px}
.ac-list{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.ac-list li{display:flex;gap:12px;align-items:center;justify-content:space-between;border:1px solid var(--line);border-radius:12px;padding:10px 14px}
.ac-list b{display:block}
.ac-list small{color:var(--ink-3)}
.tc-head{display:flex;gap:16px;align-items:flex-end;justify-content:space-between;flex-wrap:wrap;margin-bottom:8px}
.tc-head h1{font-size:clamp(1.8rem,3vw,2.4rem);margin:8px 0 6px}
.tc-code{font:700 1rem "JetBrains Mono",monospace;background:var(--navy);color:#fff;padding:2px 10px;border-radius:8px;letter-spacing:.12em}
.tc-wrap{overflow:auto;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff}
.tc{width:100%;border-collapse:collapse;font:500 .88rem var(--f-ui)}
.tc th,.tc td{padding:10px 12px;border-bottom:1px solid #EDEAE2;text-align:left;vertical-align:middle;white-space:nowrap}
.tc th{background:var(--ivory);font:700 .74rem var(--f-ui);letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3)}
.tc th button{all:unset;cursor:pointer}
.tc th button:hover{color:var(--navy)}
.tc td small{color:var(--ink-3);margin-left:6px}
.tc-bar{display:inline-block;width:110px;height:8px;border-radius:9px;background:#E8EEF6;vertical-align:middle;overflow:hidden}
.tc-bar i{display:block;height:100%;background:linear-gradient(90deg,#1F6FEB,#2EE59D)}