/* Lesson engine styles (used with style.css + exercise.css) */
.les-panel .ex-body h2{font-size:clamp(24px,4vw,38px)}
.les-steps{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 24px}
.les-step{font:700 12px "Space Mono",monospace;text-transform:uppercase;background:var(--card);color:var(--ink);border:2px solid var(--ink);padding:8px 10px;min-height:40px}
.les-step.done{background:var(--mint);color:var(--on)}
.les-step.now{background:var(--pink);color:var(--on);box-shadow:3px 3px 0 var(--ink)}
.les-step:focus-visible,.les-u:focus-visible,.les-track:focus-visible,.les-thumb:focus-visible,.les-cell input:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
.les-sh{font-size:clamp(22px,3.6vw,30px);margin:6px 0 18px;line-height:1.2}
.les-sh small{font:400 14px "Space Mono",monospace;text-transform:none;display:block;margin-top:4px}
.les-sn{display:inline-grid;place-items:center;width:36px;height:36px;background:var(--ink);color:var(--bg);font:700 18px "Space Mono",monospace}
.les-note{font:400 13px "Space Mono",monospace;margin:10px 0 22px!important}
.les-part{border:var(--b);background:var(--bg);padding:clamp(14px,3vw,22px);margin:0 0 26px;position:relative}
.les-part.checked{background:var(--card)}
.les-ph{display:flex;gap:12px;align-items:flex-start;margin:0 0 16px}
.les-ph .ex-letter{flex:none;margin:0}
.les-instr{font-weight:700;font-size:17px;line-height:1.35;padding-top:5px}
.les-pf{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:18px}
.les-res{font:700 14px "Space Mono",monospace;padding:6px 10px;border:2px solid var(--ink);color:var(--on)}
.les-res.ok{background:var(--mint)}.les-res.bad{background:#ffb3ae}
.les-lock{border:2px dashed var(--ink);padding:14px;font:700 13px "Space Mono",monospace;text-transform:uppercase}

/* pictures + word banks */
.les-pics{display:grid;grid-template-columns:repeat(var(--cols,3),minmax(0,1fr));gap:10px;margin:0 0 18px}
.les-pic{margin:0;border:var(--b);background:#fff;box-shadow:4px 4px 0 var(--ink)}
.les-pic img,.les-banner img{display:block;width:100%;height:auto}
.les-banner{margin:0 0 16px;border:var(--b);background:#fff;box-shadow:5px 5px 0 var(--ink)}
.les-bank{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px;border-block:2px solid var(--ink);padding:10px 0}
.les-w{font:700 15px "Space Grotesk",sans-serif;background:var(--yellow);color:var(--on);border:2px solid var(--ink);padding:4px 10px}
.les-w.used{background:transparent;color:var(--ink);text-decoration:line-through;opacity:.55}

/* rows */
.les-list{display:grid;gap:14px}
.les-row{display:grid;grid-template-columns:34px minmax(0,1fr);gap:10px;align-items:start;font-size:17px;line-height:2.1}
.les-row.pick{grid-template-columns:34px minmax(0,1fr) auto}
.les-row.lab{grid-template-columns:96px minmax(0,1fr)}
.les-n{font:700 14px "Space Mono",monospace;padding-top:2px;opacity:.75}
.les-txt{min-width:0}
.les-exrow{opacity:.85}
.les-exrow .les-txt{font-style:italic}
.les-ex{font-style:italic;border-bottom:3px solid var(--ink);padding:0 6px;font-weight:700}
.les-sup{font:700 11px "Space Mono",monospace;margin:0 2px 0 6px;vertical-align:super}
.les-gap{display:inline-flex;align-items:center;gap:2px;vertical-align:baseline;white-space:nowrap}
.les-gap .ex-input{min-height:38px;padding:4px 8px;font-size:16px;border-width:2px;width:auto}
.les-pre{font:700 17px "Space Mono",monospace}
.les-gap.wide{display:flex;width:100%;flex-wrap:wrap;white-space:normal}
.les-gap.wide .ex-input{width:100%}
.les-gap.ok .ex-input{background:var(--mint);color:var(--on)}
.les-gap.bad .ex-input{background:#ffb3ae;color:var(--on)}
.les-fix{font:700 13px "Space Mono",monospace;background:var(--mint);color:var(--on);padding:2px 8px;margin-left:6px;white-space:normal;border:2px solid var(--ink)}
.les-row.wide .les-txt{line-height:1.6}
.les-row.wide .les-gap{margin-top:8px}

/* article */
.les-article{background:var(--card);border:var(--b);padding:clamp(14px,3vw,22px);line-height:2.1;font-size:17px}
.les-ah{font:700 15px "Space Grotesk",sans-serif;background:var(--ink);color:var(--bg);padding:4px 10px;margin:18px 0 6px;line-height:1.4}
.les-ah:first-child{margin-top:0}
.les-ap{margin:0 0 6px}
.les-article mark{background:var(--yellow);color:var(--on);padding:0 4px}

/* circle phrases / pick buttons */
.les-opt{display:inline-block;font-size:16px;min-height:0;padding:2px 10px;box-shadow:2px 2px 0 var(--ink);text-transform:none;vertical-align:baseline;line-height:1.7;margin:2px}
.les-opt.sel{background:var(--yellow);border-radius:999px}
.les-opt.ok{background:var(--mint)}.les-opt.bad{background:#ffb3ae}
.les-opt.miss{outline:3px dashed var(--ink);outline-offset:1px}
.les-slash{opacity:.6}
.les-tick{color:inherit}
.les-opts{display:flex;gap:6px;flex-wrap:wrap;padding-top:4px}
.les-pick{font-size:15px;min-height:40px;min-width:44px;padding:6px 12px;text-transform:none}
.les-pick.miss{outline:3px dashed var(--ink);outline-offset:1px}
.les-pick.sel:disabled{opacity:1}
@media (max-width:620px){.les-row.pick{grid-template-columns:34px minmax(0,1fr)}.les-row.pick .les-opts{grid-column:2}}

/* underline task */
.les-ul{line-height:2.2}
.les-u{font:inherit;color:inherit;background:none;border:0;border-bottom:3px solid transparent;padding:0 2px;cursor:pointer}
.les-u:hover:not(:disabled){background:color-mix(in srgb,var(--yellow) 60%,transparent)}
.les-u.sel{border-bottom-color:var(--ink);background:var(--yellow);color:var(--on)}
.les-u.ok{background:var(--mint);color:var(--on);border-bottom-color:var(--ink)}
.les-u.bad{background:#ffb3ae;color:var(--on);text-decoration:line-through}
.les-u.miss{border-bottom:3px dashed var(--ink)}
.les-u:disabled{cursor:default}

/* crossword */
.les-cw-top{display:flex;gap:20px;flex-wrap:wrap;align-items:flex-start;margin-bottom:20px}
.les-cw-gridwrap{overflow-x:auto;max-width:100%;padding:4px 8px 8px 4px}
.les-cw-grid{display:grid;grid-template-columns:repeat(var(--cols),var(--cw,40px));grid-auto-rows:var(--cw,40px);gap:0;width:max-content}
.les-cell{position:relative;background:#fff;border:2px solid #111;margin:-1px 0 0 -1px}
.les-cell input{position:absolute;inset:0;width:100%;height:100%;border:0;background:transparent;text-align:center;font:700 20px "Space Mono",monospace;text-transform:uppercase;color:#111;padding:6px 0 0;caret-color:transparent}
.les-cell.on{background:#ffe88a}
.les-cell.cur{background:var(--pink)}
.les-cell.given{background:#e9e0c8}
.les-cell.ok{background:var(--mint)}
.les-cell.bad{background:#ffb3ae}
.les-cell input:disabled{opacity:1;-webkit-text-fill-color:#111}
.les-cnum{position:absolute;top:1px;left:3px;font:700 10px "Space Mono",monospace;color:#111;z-index:1;pointer-events:none}
.les-block{background:#111;margin:-1px 0 0 -1px}
.les-block.gray{background:#8a8a8a}
.les-cw-cur{flex:1 1 220px;min-width:0;border:2px dashed var(--ink);padding:10px;text-align:center}
.les-cw-cur img{display:block;width:100%;max-width:300px;margin:0 auto 8px;border:var(--b);background:#fff}
.les-cw-curtxt{font:700 13px "Space Mono",monospace;text-transform:uppercase}
.les-cw-clues h4{font:700 14px "Space Mono",monospace;text-transform:uppercase;margin:18px 0 10px}
.les-cw-thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.les-thumb{position:relative;border:var(--b);background:#fff;padding:0;line-height:0;box-shadow:3px 3px 0 var(--ink);transition:transform .12s,box-shadow .12s}
.les-thumb:hover{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}
.les-thumb img{width:100%;height:auto}
.les-thumb-ex{position:absolute;right:0;bottom:0;background:var(--yellow);color:var(--on);font:700 10px "Space Mono",monospace;text-transform:uppercase;padding:2px 6px;line-height:1.4;border:2px solid var(--ink)}
@media (max-width:520px){.les-cw-grid{--cw:32px}.les-cell input{font-size:17px}}

/* audio player */
.les-audio{border:var(--b);box-shadow:6px 6px 0 var(--ink);background:var(--card);margin:0 0 6px}
.les-audio-bar{display:flex;align-items:center;gap:7px;background:var(--blue);color:var(--on);border-bottom:var(--b);padding:7px 12px;font:700 12px "Space Mono",monospace;text-transform:uppercase}
.les-audio-bar i{width:12px;height:12px;border:2px solid #111;background:var(--yellow);display:inline-block}
.les-audio-bar span{margin-left:auto}
.les-audio-body{padding:14px 16px}
.les-audio-title{font:700 18px "Space Grotesk",sans-serif;margin-bottom:12px}
.les-audio-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.les-play{min-width:120px;padding:10px 14px}
.les-track{flex:1 1 160px;min-width:120px;height:22px;border:var(--b);background:var(--bg);position:relative;cursor:pointer;touch-action:none}
.les-fill{position:absolute;inset:0 auto 0 0;width:0;background:var(--pink)}
.les-time{font:700 13px "Space Mono",monospace;white-space:nowrap}

.les-panel .score{margin-top:6px}
.les-res:empty{display:none}
.les-banner{max-width:480px}

.les-pic{position:relative}
.les-picn{position:absolute;top:0;left:0;z-index:1;background:#fff;color:#111;border:2px solid #111;border-top:0;border-left:0;font:700 13px "Space Mono",monospace;min-width:24px;height:24px;display:grid;place-items:center}
.les-opts.stack{flex-direction:column;align-items:stretch;min-width:min(340px,100%)}
.les-opts.stack .les-pick{text-align:left;width:100%}
.les-row.pick.stk{grid-template-columns:34px minmax(0,1fr)}
.les-row.pick.stk .les-opts{grid-column:2}
@media (max-width:420px){.les-cw-grid{--cw:27px}.les-cell input{font-size:15px;padding-top:4px}.les-cnum{font-size:8px}}
.les-scr{font:700 17px "Space Mono",monospace;letter-spacing:.2em}

/* odd one out / right-or-wrong rows */
.les-oline{margin-top:8px}
.les-oin{min-height:38px;padding:4px 8px;font-size:16px;border-width:2px;width:auto}
.les-oin.ok{background:var(--mint);color:var(--on)}
.les-oin.bad{background:#ffb3ae;color:var(--on)}
.les-oline .les-ex{font-size:inherit}