/* Shared learning/reading surfaces. Every colour follows the user's 12-theme palette. */
.os-page,.os-recall{max-width:1180px;margin:0 auto}.os-heading{padding:20px 0 32px}.os-heading h1,.os-recall h1{font-family:Unbounded,Onest,sans-serif;font-size:clamp(28px,4vw,46px);line-height:1.25;letter-spacing:-1.4px;margin:14px 0}.os-heading>p{font-size:clamp(16px,2vw,21px);color:var(--muted);margin:0 0 25px;max-width:54ch}.os-eyebrow{display:flex;align-items:center;gap:9px;color:var(--accent);font-size:12px;letter-spacing:.06em;font-weight:650}.os-eyebrow .ico{width:22px;height:22px}
.os-journey{display:grid;grid-template-columns:1fr 1fr;background:var(--card);border:1px solid var(--line);border-radius:30px;padding:34px;gap:40px;position:relative;overflow:hidden}.os-journey:before{content:"";position:absolute;inset:auto auto -160px -140px;width:360px;height:360px;border-radius:50%;border:55px solid color-mix(in srgb,var(--v-secondary) 24%,transparent);pointer-events:none}.os-journey-copy{position:relative;align-self:center}.os-journey h2{font-size:clamp(22px,2.5vw,30px);line-height:1.35;max-width:23ch;margin:0 0 18px}.os-journey p{color:var(--muted);line-height:1.8;margin:0}.os-counters{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:30px}.os-counters div{display:flex;flex-direction:column;gap:7px}.os-counters b{font-family:Unbounded,Onest,sans-serif;font-size:28px;font-weight:500;letter-spacing:-1px}.os-counters span{font-size:11px;color:var(--muted);max-width:13ch;line-height:1.5}
.os-cycle{list-style:none;padding:0;margin:0;display:grid;gap:14px;counter-reset:journey}.os-cycle li{position:relative;min-width:0}.os-cycle li:not(:last-child):after{content:"";position:absolute;left:26px;bottom:-15px;width:1px;height:16px;background:var(--line)}.os-cycle a{display:flex;align-items:center;gap:17px;border:1px solid var(--line);border-radius:20px;padding:15px;color:var(--ink);text-decoration:none;background:var(--bg);transition:transform .25s,background .25s}.os-cycle a:hover{background:var(--v-surface);transform:translateX(4px)}.os-cycle a>span:nth-child(2){flex:1;min-width:0}.os-cycle strong{display:block;font-size:14px;font-weight:600}.os-cycle small{display:block;color:var(--muted);font-size:11px;line-height:1.6;margin-top:4px}.os-cycle-icon{position:relative;display:grid;place-items:center;width:44px;height:44px;flex-shrink:0;border-radius:14px;background:var(--v-surface);color:var(--accent)}.os-cycle-icon>.ico{width:25px;height:25px}.os-cycle-icon b{position:absolute;right:-5px;bottom:-5px;border:2px solid var(--card);border-radius:50%;display:grid;place-items:center;width:21px;height:21px;font-size:9px;background:var(--accent);color:var(--v-on-accent)}.os-cycle a>.ico{width:18px;flex-shrink:0}
.os-two{display:grid;grid-template-columns:1fr 1fr;gap:23px;margin-top:23px}.os-next,.os-words{border:1px solid var(--line);border-radius:25px;padding:28px;background:var(--card);min-width:0}.os-next{background:linear-gradient(140deg,var(--v-surface),var(--card));display:flex;flex-direction:column;align-items:start}.os-next h2{font-size:25px;line-height:1.35;margin:15px 0 12px}.os-next p{color:var(--muted);line-height:1.75;font-size:13px;margin:0 0 24px}.os-next .btn{margin-top:auto}.os-section-title{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:18px}.os-section-title h2{margin:0;font-size:19px}.os-section-title>span{font-size:12px;background:var(--v-surface);color:var(--accent);padding:6px 11px;border-radius:10px}.os-word-cloud{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}.os-word-cloud>p{color:var(--muted);font-size:13px;line-height:1.7}.os-word-cloud button{border:1px solid var(--line);border-radius:13px;background:var(--bg);color:var(--ink);text-align:left;padding:10px 13px;max-width:100%;font-size:15px;transition:transform .2s,border-color .2s}.os-word-cloud button:hover{transform:translateY(-3px);border-color:var(--accent)}.os-word-cloud small{display:block;font-size:10px;color:var(--muted);margin-top:3px;max-width:22ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.os-evidence{padding-top:36px}.os-topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.os-topic{display:flex;flex-direction:column;padding:21px;border:1px solid var(--line);border-radius:20px;background:var(--card);color:var(--ink);text-decoration:none;transition:transform .25s,border-color .25s}.os-topic:hover{transform:translateY(-4px);border-color:var(--accent)}.os-topic>span{display:flex;align-items:center;gap:9px;color:var(--muted)}.os-topic small{font-size:10px}.os-topic .ico{width:18px;height:18px}.os-topic h3{font-size:15px;line-height:1.5;margin:15px 0 20px}.os-dots{display:flex;gap:5px;margin-top:auto}.os-dots i{height:3px;border-radius:2px;flex:1;background:var(--line)}.os-dots .filled{background:var(--accent)}.os-topic[data-stage=repair]{border-color:color-mix(in srgb,var(--bad) 45%,var(--line))}.os-note{font-size:11px;line-height:1.8;color:var(--muted);margin-top:24px;max-width:90ch}
.os-home-link{display:flex;align-items:center;gap:20px;padding:23px 27px;margin:0 0 30px;border:1px solid var(--line);border-radius:23px;color:var(--ink);background:linear-gradient(115deg,var(--v-surface),var(--card));text-decoration:none;transition:transform .25s}.os-home-link:hover{transform:translateY(-3px)}.os-home-link>span:nth-child(2){flex:1}.os-home-link strong{display:block;font-size:18px;margin-bottom:6px}.os-home-link small{font-size:12px;color:var(--muted);line-height:1.7}.os-home-mark{display:grid;place-items:center;width:53px;height:53px;border-radius:18px;background:var(--card);color:var(--accent);flex-shrink:0}.os-home-mark .ico{width:30px;height:30px}
.os-recall{max-width:720px}.os-recall header{padding:30px 0 22px}.os-recall-card{background:var(--card);border:1px solid var(--line);border-radius:28px;padding:clamp(23px,4vw,44px)}.os-recall-card>p{color:var(--muted);line-height:1.7}.os-recall-card h2{font-size:clamp(24px,3vw,34px);line-height:1.35;overflow-wrap:anywhere;margin:22px 0 28px}.os-recall-card form{display:flex;gap:12px;margin-bottom:18px}.os-recall-card input{flex:1;min-width:0;font-size:23px;padding:13px 17px}.os-recall-context{padding:20px;background:var(--v-surface);border-radius:18px}.os-recall-feedback{border-top:1px solid var(--line);padding-top:20px}.os-recall-feedback>.btn{margin-top:18px}.os-recall-feedback>.grammar-speak{font-size:32px}.os-recall-feedback p{color:var(--muted);font-size:13px;line-height:1.7}
.lexicon-card{padding-bottom:10px}.lexicon-head{padding-bottom:17px;border-bottom:1px solid var(--line)}.lexicon-head>.grammar-speak{font-size:clamp(28px,4vw,40px)}.lexicon-primary{font-size:23px;font-weight:580;line-height:1.5;margin:24px 0 12px;overflow-wrap:anywhere}.lexicon-note,.lexicon-missing{font-size:13px;line-height:1.75;color:var(--muted)}.lexicon-missing{padding:20px;background:var(--v-surface);border-radius:16px}.lexicon-details{border-top:1px solid var(--line);padding:15px 0}.lexicon-details summary{font-size:13px;font-weight:600;cursor:pointer;padding:3px 0}.lexicon-details ul{list-style:none;padding:0;margin:15px 0 0;display:grid;gap:12px}.lexicon-details li{display:flex;flex-direction:column;gap:4px;padding:10px 13px;border-radius:12px;background:var(--bg);font-size:13px;line-height:1.6}.lexicon-details li span,.lexicon-details li small{color:var(--muted);font-size:11px}.lexicon-context{border-top:1px solid var(--line);padding:19px 0}.lexicon-context h3{font-size:13px;margin:0 0 14px}.lexicon-context>div{display:flex;flex-wrap:wrap;gap:7px;align-items:baseline;line-height:1.7}.lexicon-context button{display:inline-flex;flex-direction:column;align-items:flex-start;gap:5px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);padding:8px 10px;max-width:100%;min-height:46px}.lexicon-context button:hover{background:var(--v-surface);border-color:var(--accent)}.lexicon-context button small{font-size:10px;color:var(--muted);max-width:30ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lexicon-save{width:100%;margin:12px 0 20px}.lexicon-attribution{font-size:10px;line-height:1.8;color:var(--muted)}.lexicon-attribution summary{font-size:11px}.lexicon-attribution a{color:var(--accent)}
@media(max-width:1000px){.os-journey{gap:25px;padding:26px}.os-topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:700px){.os-journey,.os-two{grid-template-columns:1fr}.os-journey{padding:24px;gap:30px}.os-counters{margin-top:25px}.os-heading{padding-top:8px}.os-home-link{padding:20px;gap:14px}.os-home-link strong{font-size:16px}.os-topic-grid{gap:10px}.os-topic{padding:16px}.os-topic h3{font-size:13px}.os-topic small{font-size:9px}.os-recall-card form{flex-direction:column}.os-recall-card input{width:100%}.os-next,.os-words{padding:23px}.os-cycle a{gap:13px}.os-cycle small{font-size:11px}.os-heading h1{letter-spacing:-.8px}.lexicon-context button{padding:8px}.lexicon-primary{font-size:20px}}
@media(prefers-reduced-motion:reduce){.os-page *,.os-home-link,.lexicon-card *{animation:none!important;transition:none!important;scroll-behavior:auto!important}.os-cycle a:hover,.os-topic:hover,.os-word-cloud button:hover,.os-home-link:hover{transform:none}}
body[data-motion="off"] .os-page *,body[data-motion="off"] .os-home-link{transition:none!important;animation:none!important}
/* Learning OS 2: today's practice, memory strength, forecast, activity and the knowledge map */
.os-today{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:end;margin:28px 0;padding:28px;border:1px solid var(--line);border-radius:28px;background:var(--card)}
.os-today h2{font-size:clamp(26px,3vw,38px);letter-spacing:-.03em;margin:10px 0 6px}
.os-today p{color:var(--muted);max-width:620px;line-height:1.6;margin:8px 0 0}
.os-today .os-today-meta{color:var(--ink);font-weight:650;font-size:17px}
.os-today-kinds{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:14px 0 4px}
.os-today-kinds li{display:inline-flex;align-items:center;gap:7px;padding:7px 12px;border-radius:99px;background:var(--v-surface);font-size:13px}
.os-today-kinds b{color:var(--accent)}
.os-today-actions{display:flex;flex-direction:column;gap:12px;align-items:flex-end}
.os-today-actions .btn{min-height:52px;padding-inline:26px}
.os-today-actions .btn[disabled]{opacity:.45;cursor:default}
.os-plan-time button{font:inherit;cursor:pointer;border:1px solid var(--line);border-radius:99px;padding:9px 14px;background:transparent;color:inherit}
.os-plan-time button[aria-pressed=true]{background:var(--accent);color:var(--bg);border-color:var(--accent)}
.os-dashboard{display:grid;grid-template-columns:1.1fr 1.2fr 1fr;gap:18px;margin-bottom:28px}
.os-dashboard>section,.os-map{padding:22px;border:1px solid var(--line);border-radius:24px;background:var(--card);min-width:0}
.os-memory-bar{display:flex;height:14px;border-radius:99px;overflow:hidden;background:var(--v-surface);margin:14px 0}
.os-memory-bar i,.os-memory-legend i{display:block}
[data-strength=strong] i,.os-memory-bar i[data-strength=strong]{background:var(--good,#21664f)}
[data-strength=growing] i,.os-memory-bar i[data-strength=growing]{background:var(--accent)}
[data-strength=fading] i,.os-memory-bar i[data-strength=fading]{background:var(--bad,#b2413a)}
[data-strength=new] i,.os-memory-bar i[data-strength=new]{background:var(--muted);opacity:.45}
.os-memory-legend{display:grid;grid-template-columns:1fr 1fr;gap:6px;list-style:none;padding:0;margin:0}
.os-memory-legend button{display:grid;grid-template-columns:10px auto 1fr;align-items:center;gap:8px;width:100%;padding:8px 10px;border:1px solid transparent;border-radius:12px;background:none;color:inherit;font:inherit;text-align:left;cursor:pointer}
.os-memory-legend button[aria-pressed=true],.os-memory-legend button:hover{border-color:var(--line);background:var(--v-surface)}
.os-memory-legend i{width:10px;height:10px;border-radius:50%}
.os-memory-legend span{font-size:13px;color:var(--muted)}
.os-forecast-bars{display:grid;grid-template-columns:repeat(14,1fr);gap:4px;align-items:end;height:150px;list-style:none;padding:0;margin:14px 0 6px}
.os-forecast-bars li{display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;gap:4px;min-width:0}
.os-forecast-bars b{font-size:11px;color:var(--muted);font-weight:600}
.os-forecast-bars i{display:block;width:100%;max-width:22px;border-radius:6px 6px 3px 3px;background:var(--v-secondary,var(--accent));opacity:.75}
.os-forecast-bars .is-today i{background:var(--accent);opacity:1}
.os-forecast-bars small{font-size:10px;color:var(--muted);white-space:nowrap;overflow:hidden;max-width:100%}
.os-forecast-bars .is-today small{color:var(--ink);font-weight:650}
.os-activity-grid{display:grid;grid-template-columns:repeat(10,1fr);grid-auto-flow:row;gap:4px;margin:14px 0 8px}
.os-activity-grid i{aspect-ratio:1;border-radius:4px;background:var(--v-surface)}
.os-activity-grid i.on{background:var(--accent)}
.os-map{margin-bottom:28px}
.os-map-filters{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0 16px}
.os-map-filters button{font:inherit;font-size:13px;cursor:pointer;border:1px solid var(--line);border-radius:99px;padding:8px 13px;background:transparent;color:inherit}
.os-map-filters button[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.os-map-list{list-style:none;padding:0;margin:0 0 14px;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}
.os-map-list a{display:grid;gap:6px;padding:14px 16px;border:1px solid var(--line);border-radius:16px;color:inherit;text-decoration:none;height:100%;box-sizing:border-box}
.os-map-list a:hover{border-color:var(--accent)}
.os-map-kind{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.os-map-list strong{font-size:16px;line-height:1.3;overflow-wrap:anywhere}
.os-map-meter{display:block;height:6px;border-radius:99px;background:var(--v-surface);overflow:hidden}
.os-map-meter i{display:block;height:100%;border-radius:99px}
.os-map-list small{font-size:12px;color:var(--muted);line-height:1.45}
.os-how{margin:10px 0 30px;padding:18px 22px;border:1px solid var(--line);border-radius:22px}
.os-how summary{cursor:pointer;font-weight:650;min-height:32px;display:flex;align-items:center}
.os-how .os-cycle{margin-top:14px}
@media(max-width:1050px){.os-dashboard{grid-template-columns:1fr 1fr}.os-activity{grid-column:1/-1}}
@media(max-width:760px){.os-today{grid-template-columns:1fr;padding:22px;border-radius:22px}.os-today-actions{align-items:stretch}.os-today-actions .btn{width:100%;justify-content:center}.os-dashboard{grid-template-columns:1fr}.os-dashboard>section,.os-map{padding:18px}.os-forecast-bars{height:120px;gap:2px}.os-forecast-bars small{font-size:9px}.os-map-list{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.os-map-list a{transition:none}}
.os-memory-legend{grid-template-columns:1fr}
.os-memory-legend button{padding:7px 10px}
.os-session-summary{margin:6px auto 22px;padding:18px 22px;border:1px solid var(--line);border-radius:20px;background:var(--card);max-width:560px;text-align:left}
.os-session-summary h2{font-size:17px;margin:0 0 12px}
.os-session-summary>div{display:flex;flex-wrap:wrap;gap:10px 22px}
.os-session-summary span{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--muted)}
.os-session-summary b{color:var(--ink);font-size:18px}
.os-session-summary i{width:10px;height:10px;border-radius:50%}
.os-heading .os-counters{margin-top:22px}
.os-mistakes{margin-bottom:28px;padding:22px;border:1px solid var(--line);border-radius:24px;background:var(--card)}
.os-mistake-list{list-style:none;padding:0;margin:14px 0 6px;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}
.os-mistake-list li{display:flex;flex-direction:column;gap:8px;padding:16px;border:1px solid var(--line);border-radius:18px}
.os-mistake-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.os-mistake-head b{font-size:22px;color:var(--bad,#b2413a)}
.os-mistake-bar{display:block;height:6px;border-radius:99px;background:var(--v-surface);overflow:hidden}
.os-mistake-bar i{display:block;height:100%;background:var(--bad,#b2413a);border-radius:99px}
.os-mistake-list p{margin:0;font-size:13px;line-height:1.55;color:var(--muted)}
.os-mistake-example{display:flex;flex-direction:column;gap:2px;padding:8px 10px;border-radius:12px;background:var(--v-surface)}
.os-mistake-example mark{background:color-mix(in srgb,var(--bad,#b2413a) 22%,transparent);color:inherit;border-radius:3px;padding:0 1px}
.os-mistake-example b{color:var(--ink)}
.os-mistake-list .btn{margin-top:auto;align-self:flex-start;min-height:44px}
.os-leech{display:block;font-style:normal;color:var(--bad,#b2413a);font-weight:600;margin-bottom:2px}
@media(max-width:760px){.os-mistakes{padding:18px}.os-mistake-list{grid-template-columns:1fr}}
.os-foundations{margin-bottom:28px;padding:22px;border:1px solid var(--line);border-radius:24px;background:var(--card)}
.os-foundations ol{list-style:none;padding:0;margin:14px 0 6px;display:grid;gap:10px}
.os-foundations li{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 16px;border:1px solid var(--line);border-radius:16px}
.os-foundations li>div{display:grid;gap:4px;min-width:0}
.os-foundations strong{font-size:16px}
.os-foundations small{font-size:12px;color:var(--bad,#b2413a);font-weight:600}
.os-foundations p{margin:0;font-size:13px;color:var(--muted);line-height:1.5}
.os-foundations .btn{flex-shrink:0;min-height:44px}
.os-map-base{font-size:12px;color:var(--muted);line-height:1.4}
.os-map-base b{color:var(--bad,#b2413a);font-weight:600}
@media(max-width:760px){.os-foundations{padding:18px}.os-foundations li{flex-direction:column;align-items:stretch}.os-foundations .btn{width:100%;justify-content:center}}
.os-diagnosis{margin:10px 0 4px;padding:12px 14px;border-radius:14px;background:var(--v-surface);border-left:4px solid var(--bad,#b2413a)}
.os-diagnosis-type{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--bad,#b2413a)}
.os-diagnosis p{margin:6px 0 4px;font-size:17px}
.os-diagnosis mark{background:color-mix(in srgb,var(--bad,#b2413a) 22%,transparent);color:inherit;border-radius:3px;padding:0 1px}
.os-diagnosis small{display:block;font-size:13px;line-height:1.5;color:var(--muted)}
.term-explanation-actions{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;margin-top:18px}