/* learning features: sub-navigation, tests, flashcards, planner, tables, badges */
header.top{flex-wrap:wrap}
.subnav{flex:1 0 100%;order:3;display:flex;gap:8px;overflow-x:auto;padding:8px 0 2px;margin-top:6px;border-top:1px solid var(--line);-webkit-overflow-scrolling:touch}
.subnav button{flex:none;white-space:nowrap;padding:6px 12px;font-size:.88rem;border-radius:999px}
.subnav button.active{background:var(--brand);color:var(--on-brand);border-color:var(--brand);font-weight:600}
.subnav button#srchBtn{margin-left:auto}

.card label{display:block;font-size:.85rem;color:var(--muted);margin:10px 0 4px}
.card select,.card input[type="number"],.card input[type="date"]{width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--text);font:inherit}
.card label.inl{display:flex;align-items:center;gap:8px;color:var(--text);font-size:.95rem;margin:6px 0}
.card input[type="checkbox"]{width:auto}
fieldset.chk{border:1px solid var(--line);border-radius:12px;margin:12px 0 0;padding:6px 12px 10px}
fieldset.chk legend{font-size:.85rem;color:var(--muted);padding:0 6px}

.mock .meta{display:flex;justify-content:space-between;gap:10px;align-items:center}
.clock{font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums}
.clock.low{color:var(--bad)}
.chip{display:inline-block;padding:2px 8px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:.78rem}
.pal{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0}
.pb{min-width:36px;padding:5px 0;text-align:center;border-radius:8px;font-size:.85rem;font-variant-numeric:tabular-nums}
.pb.done{background:var(--brand-soft);border-color:var(--brand)}
.pb.flag{border-color:var(--gold);box-shadow:inset 0 -3px 0 var(--gold)}
.pb.cur{background:var(--brand);color:var(--on-brand);border-color:var(--brand)}
.opt.picked{border-color:var(--brand);background:var(--brand-soft)}
.wrong-item.okrev{border-left-color:var(--ok)}

.tbl-wrap{overflow-x:auto;margin:8px 0}
table.sbtbl{width:100%;border-collapse:collapse;font-size:.9rem}
table.sbtbl th,table.sbtbl td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left}
table.sbtbl th{background:var(--brand-soft);font-weight:600;white-space:nowrap}
table.sbtbl tr.tot td{font-weight:800;background:var(--brand-soft)}

.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-top:8px}
.badge{padding:10px 12px;border:1px dashed var(--line);border-radius:12px;opacity:.55}
.badge b{display:block;font-size:.92rem}
.badge small{color:var(--muted);font-size:.76rem}
.badge.on{opacity:1;border:2px solid var(--gold);background:var(--brand-soft)}

ul.hist,ul.plan,ul.srch{list-style:none;margin:6px 0;padding:0}
ul.hist li,ul.plan li,ul.srch li{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;padding:8px 0;border-bottom:1px solid var(--line)}
ul.hist li span{font-weight:700}
ul.plan li span{flex:1 1 220px}
ul.srch button{text-align:left;text-decoration:none;color:var(--text)}
ul.srch small{display:block;color:var(--muted)}
#srchQ{width:100%;padding:11px 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--text);font:inherit;margin:8px 0}
dialog.wide ul.srch{max-height:52vh;overflow:auto}

.fcard .face{min-height:200px;padding:22px 16px;text-align:center;border:2px solid var(--line);border-radius:18px;background:var(--bg);margin:12px 0;display:flex;flex-direction:column;justify-content:center}
.fcard .face h2{margin:6px 0}
.fcard .face p{margin:6px 0 0;line-height:1.5}
.fcard .face small{color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-size:.7rem}
.fcard .face hr{border:0;border-top:1px dashed var(--line);margin:14px 0}

/* AI teacher in the chat */
.sbq-mode{display:flex;align-items:center;gap:6px;padding:6px 12px;font-size:.8rem;color:var(--muted);border-top:1px solid var(--line);cursor:pointer}
.sbq-mode input{width:auto;margin:0}
.sbq-think{opacity:.75;font-style:italic}
.sbq-aitext{margin:0 0 8px;line-height:1.5}
/* teacher dashboard */
.subnav button.adm-btn{border-color:var(--gold);font-weight:700}
.adm-filters{display:flex;flex-wrap:wrap;gap:12px}
.adm-filters>div{flex:1 1 220px}
details{margin:8px 0;border:1px solid var(--line);border-radius:12px;padding:8px 12px}
details summary{cursor:pointer}
tr.ans-row td{background:var(--bg)}
.ans{padding:8px 10px;margin:6px 0;border-left:4px solid var(--line);border-radius:6px;font-size:.88rem}
.ans.ok{border-left-color:var(--ok)}
.ans.bad{border-left-color:var(--bad)}
.ans small{color:var(--muted)}
/* tool pages (mock tests, practice, flashcards, planner, dashboards) open at the top, without the banner and chapter list */
body.tool-view .hero{display:none}
body.tool-view .side{display:none}
body.tool-view .layout{grid-template-columns:1fr;max-width:860px;margin-top:14px}