/* Seventh concept only: one real, memory-only mini-surface at a time. */
.h-exploration{margin-top:36px}.h-heading{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:18px}.h-heading h2{font-size:20px}.h-heading p{font-size:12px;color:var(--text-2)}.h-workbench{display:grid;grid-template-columns:270px minmax(0,1fr);gap:8px 24px;align-items:stretch}.h-tool{display:contents}.h-choice{display:flex;grid-column:1;align-items:center;gap:12px;text-align:start;border:1px solid var(--border);border-radius:12px;padding:13px;background:var(--bg-elev);color:var(--text);cursor:pointer;min-height:78px;width:100%}.h-choice>span:nth-child(2){flex:1;min-width:0}.h-choice strong,.h-choice small{display:block}.h-choice strong{font-size:15px;font-weight:600}.h-choice small{font-size:11px;line-height:1.7;color:var(--text-2);margin-top:3px}.h-tool-number{display:grid;place-items:center;width:26px;height:26px;flex:none;border-radius:8px;background:var(--bg-sunk);color:var(--text-2);font-size:12px}.h-open-marker{font-size:10px;color:var(--text-2)}.h-choice[aria-expanded=true]{border-color:var(--brand);background:var(--brand-soft)}.h-choice[aria-expanded=true] strong{font-weight:800}.h-choice[aria-expanded=true] .h-tool-number{background:var(--brand);color:var(--action-primary-ink)}.h-choice[aria-expanded=true] .h-open-marker{font-weight:700;color:var(--brand-text)}.h-panel{grid-column:2;grid-row:1 / span 5;min-width:0;min-height:410px;background:var(--bg-elev);border:1px solid var(--border);border-radius:18px;padding:22px}.h-panel[hidden]{display:none!important}.h-panel button{font:inherit;cursor:pointer;min-height:44px;border:1px solid var(--border);border-radius:10px;background:var(--bg-elev);color:var(--text);padding:7px 14px}.h-panel button[aria-pressed=true]{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-text);font-weight:800;box-shadow:inset 0 -3px 0 var(--brand)}.h-choice:focus-visible,.h-panel button:focus-visible,.h-panel input:focus-visible{outline:3px solid var(--action-focus-ring);outline-offset:3px}.h-context{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-bottom:1px solid var(--border);padding-bottom:14px;margin-bottom:14px}.h-context strong{font-size:16px}.h-context span{font-size:12px;color:var(--text-2)}.h-summary{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px}.h-summary strong{font-size:14px}.h-summary span,.h-summary bdi{font-size:12px;color:var(--text-2)}.h-hint{font-size:12px;line-height:1.8;color:var(--text-2);margin:12px 0}.h-student{display:flex;justify-content:space-between;gap:16px;align-items:center;min-height:69px;border-bottom:1px solid var(--border)}.h-student strong{font-size:14px;line-height:1.7}.h-att-controls{display:flex;gap:6px;flex:none}.h-att-controls button{font-size:13px;min-width:64px}.h-feedback{margin-top:18px;padding:10px 12px;border-radius:9px;font-size:13px;color:var(--brand-text);background:var(--brand-soft)}.h-quick-card{max-width:330px;margin:20px auto;border:1px solid var(--brand);border-radius:16px;padding:20px;text-align:center}.h-quick-card>strong,.h-quick-card>span{display:block}.h-quick-card>strong{font-size:18px}.h-quick-card>span{font-size:12px;color:var(--text-2);margin:8px 0}.h-quick-card output{display:block;font-size:36px;font-weight:800;color:var(--brand-text);margin:12px 0}.h-quick-card>div{display:flex;justify-content:space-between;gap:20px;direction:ltr}.h-quick-card button{width:48px;height:48px;border-radius:50%;font-size:24px}.h-quick-card .h-plus{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-text)}.h-quick-card .h-minus{background:var(--info-soft);border-color:var(--info-border);color:var(--info)}.h-grade{max-width:350px;margin:24px auto}.h-grade>strong{display:block;font-size:18px;margin-bottom:20px}.h-grade label{display:block;font-size:13px;font-weight:700;margin-bottom:8px}.h-grade>div{display:flex;align-items:center;gap:12px}.h-grade input{width:110px;min-height:48px;border:1px solid var(--border);border-radius:10px;background:var(--bg);padding:10px;color:var(--text);text-align:center;font:inherit;font-size:20px}.h-grade input[aria-invalid=true]{border-color:var(--warn)}.h-grade span{font-size:13px;color:var(--text-2)}.h-group-controls{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.h-group-controls>span{font-size:13px;margin-inline-end:6px}.h-group-controls button[data-divide]{background:var(--action-primary);color:var(--action-primary-ink);margin-inline-start:auto}.h-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:20px}.h-groups>section{border:1px solid var(--border);border-radius:12px;padding:13px}.h-groups h4{display:flex;justify-content:space-between;gap:8px;font-size:13px;color:var(--brand-text);margin-bottom:8px}.h-groups h4 span{color:var(--text-2);font-size:11px;font-weight:400}.h-groups ul{list-style:none;padding:0;margin:0}.h-groups li{font-size:12px;line-height:2}.h-days{display:flex;gap:8px;margin-bottom:16px}.h-sessions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.h-sessions button span,.h-sessions button bdi{display:block}.h-sessions button span{font-size:14px;font-weight:700}.h-sessions button bdi{font-size:12px;margin-top:6px}.h-session-detail{padding:20px;border-inline-start:3px solid var(--brand);border-radius:10px;background:var(--brand-soft);margin-top:20px}.h-session-detail>span{font-size:12px;color:var(--text-2)}.h-session-detail h4{font-size:20px;margin:10px 0 6px}.h-session-detail strong,.h-session-detail bdi{display:block;font-size:14px;margin-top:6px}
@media(min-width:760px) and (max-width:1000px){.h-workbench{grid-template-columns:230px minmax(0,1fr);gap:8px 16px}.h-choice{gap:9px;padding:10px}.h-panel{padding:18px}.h-context{display:block}.h-context span{display:block;margin-top:5px}.h-student{gap:10px}.h-att-controls button{padding:7px 9px;min-width:54px}.h-student strong{font-size:13px}}
@media(max-width:759px){.h-workbench{display:block}.h-tool{display:block;margin-bottom:10px}.h-choice{min-height:74px;padding:12px}.h-panel{margin-top:8px;min-height:0;padding:16px;border-radius:14px}.h-heading{display:block}.h-heading h2{font-size:19px}.h-heading p{margin-top:7px;font-size:11px}.h-exploration{margin-top:28px}.h-context{display:block}.h-context strong{font-size:15px}.h-context span{display:block;margin-top:5px;font-size:11px}.h-student{gap:10px;align-items:start;flex-direction:column;padding:12px 0}.h-student strong{font-size:14px}.h-att-controls{width:100%}.h-att-controls button{flex:1}.h-summary{gap:10px}.h-summary bdi{font-size:11px}.h-groups{grid-template-columns:minmax(0,1fr)}.h-group-controls button[data-divide]{width:100%;margin-top:6px}.h-group-controls>span{flex:1}.h-quick-card{padding:18px}.h-sessions{grid-template-columns:minmax(0,1fr)}.h-sessions button{display:flex;justify-content:space-between;align-items:center}.h-sessions button bdi{margin:0}.h-session-detail h4{font-size:18px}}