/* Socratello homework */
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.hw-badge{display:inline-grid;place-items:center;min-width:1.4em;height:1.4em;padding:0 .35em;margin-left:.3em;border-radius:999px;background:var(--candy);color:#fff;font-size:.75em;font-weight:800;line-height:1}

/* pupil list */
.hw-list{display:grid;gap:14px;margin:0 0 24px}
.hw-item{display:flex;align-items:center;gap:16px;background:var(--surface);border:2px solid var(--line);border-top:6px solid var(--c);border-radius:var(--r);padding:14px 18px}
.hw-item.hw-todo{border-color:var(--c)}
.hw-item.hw-overdue{background:var(--bad-bg)}
.hw-icon{font-size:2rem;line-height:1}
.hw-info{flex:1;display:flex;flex-direction:column;min-width:0}
.hw-sub{font-size:.8rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.hw-topic{font-family:var(--display);font-size:1.3rem;font-weight:600}
@media (max-width:560px){.hw-item{flex-wrap:wrap}.hw-go{width:100%}.hw-go .btn{width:100%;text-align:center}}

/* doing a homework */
.hw-qs{list-style:none;padding:0;margin:0 0 20px;display:grid;gap:14px;counter-reset:hwq}
.hw-q{counter-increment:hwq;background:var(--surface);border:2px solid var(--line);border-radius:var(--r);padding:16px 18px}
.hw-q fieldset{border:0;padding:0;margin:0;display:grid;gap:8px}
.hw-prompt{display:block;font-family:var(--display);font-size:1.25rem;font-weight:600;margin:0 0 10px;padding:0}
.hw-prompt::before{content:counter(hwq) ". ";color:var(--muted)}
.hw-form .hw-input{max-width:340px;font-size:1.2rem}
.hw-opt{display:flex;align-items:center;gap:10px;min-height:48px;padding:6px 14px;border:2px solid var(--line);border-radius:14px;background:var(--soft);font-weight:700;cursor:pointer}
.hw-opt:has(input:checked){border-color:var(--sea);background:var(--sky)}
.hw-opt input{width:1.3em;height:1.3em;accent-color:var(--sea)}
.hw-q.right{border-color:var(--mint);background:var(--good-bg)}
.hw-q.wrong{border-color:var(--candy);background:var(--bad-bg)}
.hw-q p{margin:.2em 0}
.hw-tick{color:var(--mint);font-weight:800;margin-left:.4em}
.hw-cross{color:var(--candy);font-weight:800;margin-left:.4em}
.hw-score{text-align:center}
.hw-big{font-family:var(--display);font-size:3rem;font-weight:700;line-height:1.1}
.hw-score.hw-green{background:var(--good-bg)}
.hw-score.hw-amber{background:#FFF4D6}
.hw-score.hw-red{background:var(--bad-bg)}

/* staff */
.hw-weeks td{vertical-align:top}
.hw-actions{white-space:nowrap}
.hw-actions details{display:inline-block;vertical-align:top}
.hw-actions summary{list-style:none;cursor:pointer}
.hw-actions summary::-webkit-details-marker{display:none}
.hw-change{white-space:normal;width:min(320px,80vw);margin-top:8px;padding:12px;border:2px solid var(--line);border-radius:14px;background:var(--soft)}
.hw-change fieldset{border:0;padding:0;margin:0 0 6px}
.hw-change legend{font-weight:800}
.hw-radio{display:flex !important;flex-direction:row !important;align-items:center;gap:8px;font-weight:700}
.hw-radio input{width:auto !important;min-height:0 !important}
.hw-checks{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:6px 16px;margin-bottom:12px}
.hw-band{display:inline-block;padding:2px 10px;border-radius:999px;font-weight:800}
.hw-band.hw-green{background:var(--good-bg)}
.hw-band.hw-amber{background:#FFF4D6;color:#6B4500}
.hw-band.hw-red{background:var(--bad-bg)}
.hw-hard{display:grid;gap:12px;padding-left:1.2em}
.hw-help{margin-top:12px}
.hw-help summary{cursor:pointer}
.hw-weeklist{display:flex;flex-wrap:wrap;gap:6px}
.hw-weeklist span{padding:2px 8px;border:1px solid var(--line);border-radius:8px;font-size:.9rem}
.hw-weeklist span.now,.hw-now td{background:var(--good-bg)}
@media (prefers-color-scheme:dark){.hw-score.hw-amber,.hw-band.hw-amber{background:#4A3A10;color:#FFE7A3}}

/* lesson starters: setup */
.st-form{max-width:720px}
.st-modes{border:0;padding:0;margin:0 0 8px;display:grid;gap:8px}
.st-modes legend{font-weight:800;margin-bottom:6px}
.st-mode{display:flex !important;flex-direction:row !important;gap:12px;align-items:flex-start;padding:12px 14px;border:2px solid var(--line);border-radius:14px;cursor:pointer}
.st-mode:has(input:checked){border-color:var(--sea);background:var(--sky)}
.st-mode input{width:1.3em !important;height:1.3em;min-height:0 !important;margin-top:.2em;accent-color:var(--sea)}
.st-mode span{display:flex;flex-direction:column}

/* lesson starters: whiteboard view — big, high-contrast, readable from the back of the room */
body.wb{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--body);color:var(--ink);font-size:clamp(16px,1.3vw,25px)}
.wb-bar{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:12px 32px;background:var(--surface);border-bottom:3px solid var(--line)}
.wb-eyebrow{font-weight:800;color:var(--muted);letter-spacing:.04em}
.wb-title h1{margin:0;font-family:var(--display);font-size:clamp(24px,2.4vw,44px);line-height:1.1}
.wb-timer{display:flex;align-items:center;gap:16px}
.wb-clock{font-family:var(--display);font-weight:700;font-size:clamp(36px,3.6vw,68px);font-variant-numeric:tabular-nums;min-width:3.2ch;text-align:right}
.wb-timer.done .wb-clock{color:var(--candy);animation:wbpulse 1s ease-in-out 4}
@keyframes wbpulse{50%{transform:scale(1.15)}}
@media (prefers-reduced-motion:reduce){.wb-timer.done .wb-clock{animation:none}}
.wb-main{flex:1;padding:16px 32px}
.wb-grid{list-style:none;margin:0;padding:0;display:grid;gap:14px;grid-template-columns:repeat(2,minmax(0,1fr))}
.wb-grid.wb-n3,.wb-grid.wb-n4{grid-template-columns:repeat(2,minmax(0,1fr))}
.wb-grid.wb-n3 .wb-card:last-child:nth-child(odd),.wb-grid.wb-n5 .wb-card:last-child{grid-column:1/-1}
.wb-card{display:flex;gap:16px;align-items:flex-start;background:var(--surface);border:3px solid var(--line);border-radius:20px;padding:14px 20px}
.wb-num{flex:none;display:grid;place-items:center;width:1.7em;height:1.7em;border-radius:50%;background:var(--sea);color:var(--on-sea,#fff);font-family:var(--display);font-weight:700;font-size:1.3em}
.wb-body{flex:1;min-width:0}
.wb-q{margin:.1em 0 .35em;font-weight:800;font-size:1.2em;line-height:1.25}
.wb-opts{margin:.1em 0 .4em;padding-left:1.6em;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.1em 1.6em;font-weight:700}
.wb-opts li{padding-left:.2em}
.wb-opts li::marker{font-weight:800;color:var(--muted)}
.wb-reveal{font:inherit;font-size:.8em;font-weight:800;border:2px dashed var(--line);background:transparent;color:var(--muted);border-radius:12px;padding:.3em .9em;cursor:pointer}
.wb-reveal:hover{border-color:var(--sea);color:var(--ink)}
.wb-ans[hidden]{display:none}
.wb-ans{margin:.2em 0 0;display:inline-block;padding:.25em .8em;border-radius:12px;background:var(--good-bg);font-weight:800;font-size:1.15em}
.wb-foot{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding:10px 32px;border-top:3px solid var(--line);background:var(--surface)}
.wb-btn{font:inherit;font-size:.85em;font-weight:800;border:0;border-radius:14px;padding:.55em 1.1em;min-height:44px;background:var(--sea);color:var(--on-sea,#fff);text-decoration:none;cursor:pointer}
.wb-btn.ghost{background:var(--soft);color:var(--ink)}
.wb-hint{margin-left:auto;color:var(--muted);font-size:.75em}
.wb-hint kbd{font:inherit;font-weight:800;border:2px solid var(--line);border-radius:6px;padding:0 .4em}
.wb-empty{max-width:40em;margin:10vh auto;text-align:center;font-size:1.1em}
/* a long option list (sentences) reads better in one column */
.wb-opts.long{grid-template-columns:1fr}
@media (max-width:800px){.wb-opts{grid-template-columns:1fr}.wb-grid,.wb-grid.wb-n3,.wb-grid.wb-n4{grid-template-columns:1fr}.wb-hint{display:none}.wb-bar{flex-wrap:wrap}}
@media print{.wb-reveal,.wb-foot,.wb-timer button{display:none}.wb-ans[hidden]{display:none}}