/* Picture-first utility guide; shares the replay room's colour and type tokens. */
.u-pro-filter{min-height:42px;padding:8px 12px;border:1px solid var(--line);border-radius:7px;background:var(--panel);color:var(--muted);font-size:12px;white-space:nowrap}.u-pro-filter[aria-pressed=true]{border-color:var(--accent);background:var(--soft);color:var(--accent)}.u-pro-badge{padding:2px 0;color:var(--accent);font-size:12px}.u-pro-source{border-left:2px solid var(--accent);padding-left:12px}.u-result-tools{flex-wrap:wrap}
.u-card-visual>img,.u-step-peek img,.lesson-step-image img{height:auto}
.utility-topbar{gap:24px}.utility-context{color:var(--muted);border-left:1px solid var(--line);padding-left:24px}.u-saved{margin-left:auto;display:flex;align-items:center;gap:8px;min-height:44px;background:var(--panel);padding:8px 14px;border:1px solid var(--line);border-radius:8px;font-size:13px}.u-saved span{min-width:1.3em;font-variant-numeric:tabular-nums}.u-saved[aria-pressed=true]{background:var(--soft);color:var(--accent);border-color:var(--accent)}
.utility-main{max-width:1320px;margin:auto;padding:0 36px 48px}.u-intro{display:flex;justify-content:space-between;align-items:center;gap:28px;padding:40px 0 28px}.u-intro h1{font-size:34px;letter-spacing:-.8px;line-height:1.4;margin:0 0 10px;font-weight:650}.u-intro p{margin:0;color:var(--muted);font-size:15px}.u-format{display:flex;align-items:center;gap:14px;color:var(--accent);flex-shrink:0}.u-format svg{width:38px;height:38px}.u-format span{font-weight:600}.u-format small{display:block;color:var(--muted);font-size:12px;font-weight:400;margin-top:4px}
.u-selector{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px}.u-filter-grid{display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:28px}.u-field>span,.u-level legend{display:block;font-size:13px;font-weight:600;margin-bottom:10px}.u-field b,.u-level b{font:500 20px var(--display);color:var(--accent);margin-right:7px}.u-field select{width:100%;background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:7px;height:46px;padding:0 12px;font-size:14px}.u-level{border:0;padding:0;margin:0;min-width:0}.u-level legend{padding:0}.u-segments{display:flex;border-radius:9px;padding:4px;background:var(--bg);border:1px solid var(--line);gap:4px}.u-segments button{min-height:36px;flex:1;border-radius:5px;background:transparent;color:var(--muted);font-size:13px}.u-segments button[aria-pressed=true]{background:var(--accent);color:var(--panel);font-weight:600}.u-quick{border-top:1px solid var(--line);margin-top:20px;padding-top:16px;display:flex;align-items:center;gap:20px}.u-quick>span{color:var(--muted);font-size:12px;flex-shrink:0}.u-quick>div{display:flex;gap:8px;flex-wrap:wrap}.u-agent-button{display:flex;align-items:center;gap:7px;background:transparent;border:1px solid transparent;border-radius:7px;padding:4px 10px 4px 4px;min-height:42px;font-size:12px}.u-agent-button img{width:30px;height:30px;border-radius:50%;background:var(--soft)}.u-agent-button[aria-pressed=true]{border-color:var(--accent);background:var(--soft);color:var(--accent)}.u-level-help{font-size:12px;color:var(--muted);margin:14px 0 0;text-wrap:pretty}
.u-results{padding-top:32px}.u-results-heading{display:flex;justify-content:space-between;gap:18px;align-items:center}.u-results-heading h2{font-size:21px;font-weight:600;margin:0 0 5px}.u-results-heading p{font-size:12px;color:var(--muted);margin:0;font-variant-numeric:tabular-nums;min-height:20px}.u-result-tools{display:flex;gap:15px;align-items:center}.u-result-tools select{height:42px;border:1px solid var(--line);border-radius:7px;background:var(--panel);color:var(--text);padding:0 10px;font-size:12px}.u-text{background:transparent;color:var(--accent);padding:10px 0;font-size:12px;min-height:44px}.u-version-note{color:var(--muted);font-size:12px;margin:16px 0 20px;border-left:2px solid var(--line);padding-left:10px;max-width:74ch}
.utility-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.u-card{min-width:0;border:1px solid var(--line);background:var(--panel);border-radius:12px;overflow:hidden}.u-card-visual{display:block;width:100%;position:relative;padding:0;background:#161b25;overflow:hidden}.u-card-visual>img{display:block;width:100%;aspect-ratio:16/9;object-fit:contain}.u-image-hint{position:absolute;bottom:10px;right:10px;background:rgb(0 0 0 / .78);color:#fff;padding:4px 9px;border-radius:5px;font-size:12px}.u-card-body{padding:19px 20px 0}.u-card-meta{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);flex-wrap:wrap}.u-agent-label{display:flex;align-items:center;gap:5px;color:var(--text)}.u-agent-label img{width:23px;height:23px;border-radius:50%;background:var(--soft)}.u-badge{padding:2px 8px;border-radius:4px;background:var(--soft);color:var(--accent);font-size:12px;font-weight:500}.u-badge.advanced{background:#f4edfb;color:#735095}.u-card h3{font-size:19px;line-height:1.55;margin:12px 0 8px;font-weight:600;text-wrap:pretty}.u-card-goal{margin:0;color:var(--muted);font-size:13px;line-height:1.8;max-width:70ch}.u-step-peek{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin:16px 0}.u-step-peek button{padding:0;background:transparent;min-width:0;text-align:left}.u-step-peek img{width:100%;aspect-ratio:16/9;object-fit:contain;display:block;border-radius:5px;background:#161b25}.u-step-peek span{display:block;font-size:11px;color:var(--muted);line-height:1.5;margin-top:6px}.u-card-actions{display:flex;align-items:center;gap:12px;padding:14px 20px;border-top:1px solid var(--line)}.u-open{border-radius:7px;min-height:42px;padding:9px 16px;background:var(--accent);color:var(--panel);font-size:13px;font-weight:600}.u-save{background:transparent;color:var(--muted);margin-left:auto;border-radius:6px;min-height:42px;min-width:72px;display:flex;align-items:center;justify-content:center;gap:6px;font-size:12px}.u-save svg{width:17px;height:17px}.u-save[aria-pressed=true]{color:var(--accent);background:var(--soft)}.u-practiced{font-size:12px;color:var(--accent)}
.u-empty{grid-column:1/-1;padding:48px 24px;text-align:center;border:1px dashed var(--line);border-radius:12px}.u-empty h3{font-size:20px;margin:0 0 12px}.u-empty p{color:var(--muted);max-width:50ch;margin:0 auto 20px}.u-empty-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.u-empty a,.u-empty button{display:inline-block;background:var(--soft);color:var(--accent);padding:10px 16px;border-radius:7px;min-height:44px;font-size:13px}
.u-bridge{margin-top:36px;padding:28px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px}.u-bridge h2{font-size:18px;font-weight:600;margin:0 0 7px}.u-bridge p{font-size:13px;color:var(--muted);margin:0}.u-bridge a{color:var(--accent);font-weight:500;flex-shrink:0;padding:12px 0;min-height:44px}.u-about{margin-top:24px;color:var(--muted);font-size:12px;max-width:85ch}.u-about summary{cursor:pointer;padding:10px 0;color:var(--text)}.u-about p{line-height:1.9}
.lesson-dialog{width:min(1080px,calc(100vw - 32px));max-width:1080px;max-height:90dvh;border:1px solid var(--line);border-radius:16px;padding:32px;background:var(--panel);color:var(--text);box-shadow:var(--elevation-dialog);overflow:auto}.lesson-dialog::backdrop,.image-dialog::backdrop{background:rgb(0 0 0 / .65);backdrop-filter:blur(3px)}.u-dialog-close{position:absolute;top:12px;right:12px;width:44px;height:44px;border-radius:50%;background:var(--bg);font:26px/1 var(--sans);display:grid;place-items:center}.lesson-heading{padding-right:36px}.lesson-heading h2{font-size:26px;line-height:1.5;margin:12px 0 10px}.lesson-heading>p{font-size:14px;color:var(--muted);max-width:68ch}.u-tip{background:var(--soft);border-radius:8px;padding:12px 16px;margin:20px 0;font-size:13px;line-height:1.9}.u-tip strong{display:block;margin-bottom:3px}.lesson-steps{display:grid;grid-template-columns:1fr 1fr;gap:24px 20px;padding:0;list-style:none;counter-reset:step}.lesson-steps li{counter-increment:step;min-width:0}.lesson-step-image{display:block;padding:0;width:100%;border-radius:8px;overflow:hidden;background:#161b25;cursor:zoom-in;position:relative}.lesson-step-image img{display:block;width:100%;aspect-ratio:16/9;object-fit:contain}.lesson-steps h3{font-size:16px;line-height:1.5;margin:12px 0 6px;display:flex;align-items:baseline;gap:8px}.lesson-steps h3::before{content:counter(step,decimal-leading-zero);color:var(--accent);font:500 20px var(--display)}.lesson-steps p{color:var(--muted);font-size:13px;line-height:1.85;margin:0}.lesson-source{border-top:1px solid var(--line);padding-top:18px;margin-top:28px;color:var(--muted);font-size:12px;overflow-wrap:anywhere}.lesson-source a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.lesson-source p{margin:6px 0}.lesson-bottom{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:22px}.u-practice{min-height:44px;border-radius:7px;background:var(--soft);color:var(--accent);padding:9px 16px;border:1px solid var(--line)}.u-practice[aria-pressed=true]{border-color:var(--accent)}.lesson-bottom .u-save{margin-left:0;border:1px solid var(--line);padding:8px 16px}.lesson-bottom a{margin-left:auto;color:var(--accent);min-height:44px;padding:10px 0;font-size:13px}
.image-dialog{width:min(1300px,calc(100vw - 24px));max-width:1300px;max-height:94dvh;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--text);overflow:auto}.u-image-toolbar{display:flex;align-items:center;gap:12px;margin-bottom:12px}.u-image-toolbar h2{font-size:15px;margin:0;flex:1}.u-image-toolbar button{min-height:44px;padding:8px 12px;border-radius:6px;background:var(--soft);color:var(--text);font-size:13px}.u-image-toolbar #image-close{font-size:24px;width:44px;padding:0;flex-shrink:0}#image-scroll{max-height:68dvh;overflow:auto;background:#111;border-radius:6px}#large-image{display:block;width:100%;max-width:none}#image-scroll.zoomed #large-image{width:200%}#image-caption{font-size:13px;color:var(--muted);margin:12px 0 0;max-width:80ch}body:has(dialog[open]){overflow:hidden}#utility-toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,12px);max-width:calc(100vw - 32px);background:var(--text);color:var(--panel);padding:10px 18px;border-radius:8px;z-index:80;opacity:0;pointer-events:none;transition:opacity .16s,transform .16s;font-size:13px}#utility-toast.visible{opacity:1;transform:translate(-50%,0)}
.utility-page button{transition:background .15s,color .15s,transform .12s}.utility-page button:active{transform:scale(.97)}.utility-page button:hover{filter:brightness(.97)}.utility-page dialog[open]{animation:utility-open .16s ease-out}@keyframes utility-open{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@media(prefers-color-scheme:dark){.u-segments button[aria-pressed=true],.u-open{background:#3767b3;color:#fff}.u-badge.advanced{background:#382b49;color:#ddc2fa}.utility-page button:hover{filter:brightness(1.1)}}
@media(max-width:900px){.utility-main{padding-left:24px;padding-right:24px}.u-intro h1{font-size:28px}.u-format{display:none}.u-filter-grid{gap:16px}.u-selector{padding:20px}.utility-grid{gap:18px}.u-card-body{padding:16px 16px 0}.u-card-actions{padding:12px 16px}.u-step-peek span{font-size:11px}.u-card h3{font-size:17px}}
@media(max-width:650px){.utility-topbar{flex-wrap:nowrap;height:70px;gap:12px}.utility-context{display:none}.u-saved{padding:8px;font-size:12px;gap:5px}.u-saved svg{width:16px;height:16px}.utility-main{padding:0 16px 28px}.u-intro{padding:28px 0 22px}.u-intro h1{font-size:26px;letter-spacing:-.5px}.u-intro p{font-size:13px;max-width:30ch}.u-selector{padding:16px;border-radius:12px}.u-filter-grid{grid-template-columns:1fr 1fr;gap:16px 12px}.u-level{grid-column:1/-1}.u-field>span,.u-level legend{font-size:12px;margin-bottom:8px}.u-field select{font-size:13px;padding:0 7px}.u-segments button{min-height:38px}.u-quick{align-items:flex-start;gap:8px}.u-quick>span{padding-top:10px}.u-quick>div{gap:2px}.u-agent-button{font-size:11px;padding-right:5px;gap:4px}.u-agent-button img{width:25px;height:25px}.u-level-help{font-size:12px}.u-results{padding-top:26px}.u-results-heading{align-items:flex-start;flex-direction:column;gap:12px}.u-result-tools{width:100%;justify-content:space-between}.u-results-heading h2{font-size:20px}.utility-grid{grid-template-columns:1fr;gap:20px}.u-card h3{font-size:19px}.u-card-body{padding:17px 16px 0}.u-step-peek{gap:8px}.u-step-peek span{font-size:12px}.u-bridge{align-items:flex-start;flex-direction:column;gap:8px;margin-top:26px}.u-bridge h2{font-size:17px}.lesson-dialog{padding:22px 16px;width:calc(100vw - 20px);max-height:92dvh;border-radius:12px}.lesson-heading h2{font-size:22px}.lesson-steps{grid-template-columns:1fr;gap:24px}.lesson-bottom{gap:10px}.lesson-bottom a{margin-left:0}.u-image-toolbar{gap:8px;flex-wrap:wrap}.u-image-toolbar h2{flex-basis:calc(100% - 58px)}#image-close{order:1}#image-zoom{order:2}.u-image-toolbar h2{order:0}.image-dialog{padding:12px}.u-dialog-close{top:8px;right:8px}.u-card-actions .u-open{flex:1}}
@media(prefers-reduced-motion:reduce){.utility-page *{scroll-behavior:auto!important;animation:none!important;transition:none!important}.utility-page button:active{transform:none}}

/* Original-resolution teaching frames and a touch-friendly detail viewer. */
.lesson-steps{grid-template-columns:1fr;max-width:900px;margin-inline:auto;gap:32px}
.lesson-step-image img{aspect-ratio:auto;width:100%;height:auto}
.image-dialog{width:min(1500px,calc(100vw - 24px));max-width:1500px}
.u-image-toolbar{flex-wrap:wrap}.u-image-toolbar h2{min-width:180px}
.u-image-toolbar button[aria-pressed=true]{background:var(--accent);color:#fff}
.u-image-toolbar button:disabled{opacity:.35;cursor:default}
#image-scroll{height:65dvh;max-height:65dvh;overscroll-behavior:contain;touch-action:pan-x pan-y pinch-zoom}
#large-image{height:auto;max-width:none;margin-inline:auto;image-rendering:auto}
.image-detail-bar{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-top:12px;font-variant-numeric:tabular-nums}
.image-detail-bar a{color:var(--accent);text-underline-offset:3px;min-height:32px;display:inline-flex;align-items:center}
.image-help{font-size:12px;color:var(--muted);line-height:1.7}
@media(max-width:650px){.u-image-toolbar h2{flex-basis:calc(100% - 58px)}.u-image-toolbar button{order:2;flex:1;padding:8px 6px;white-space:nowrap}.u-image-toolbar #image-close{order:1;flex:0 0 44px}.u-image-toolbar #image-prev,.u-image-toolbar #image-next{flex:0 0 44px}#image-scroll{height:54dvh;max-height:54dvh}.lesson-steps{gap:24px}}

/* Short learning routes: sequence numbers describe the order to practise. */
.u-learning-pack{margin-top:28px;padding:26px 0 28px;border-bottom:1px solid var(--line)}
.u-learning-pack>h2{font-size:21px;font-weight:600;margin:0 0 14px;line-height:1.5}
.u-pack-hint{font-size:13px;color:var(--muted);max-width:65ch;margin:0 0 16px}
.u-pack-suggestions{display:flex;gap:12px;flex-wrap:wrap}
.u-pack-suggestions button{display:flex;align-items:center;gap:12px;padding:10px 14px;background:var(--panel);border:1px solid var(--line);border-radius:8px;text-align:left;min-height:64px;color:var(--text)}
.u-pack-suggestions img{width:34px;height:34px;border-radius:50%;background:var(--soft)}
.u-pack-suggestions small{display:block;font-size:12px;color:var(--muted)}
.u-pack-suggestions button>span:last-child{margin-left:10px;color:var(--accent)}
.u-pack-overview{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:18px}
.u-pack-overview h3{font-size:17px;line-height:1.6;margin:0 0 5px;font-weight:600;text-wrap:pretty}
.u-pack-overview p{font-size:13px;color:var(--muted);margin:0;max-width:65ch;text-wrap:pretty}
.u-pack-start,.u-pack-secondary{min-height:44px;border-radius:7px;padding:10px 16px;font-size:13px;flex-shrink:0}
.u-pack-start{color:var(--accent);background:var(--soft);border:1px solid var(--line)}
.u-pack-secondary{padding-inline:0;background:transparent;color:var(--accent);text-align:left}
.u-pack-list{list-style:none;counter-reset:pack-step;padding:0;margin:0;border-top:1px solid var(--line)}
.u-pack-list li{counter-increment:pack-step;border-bottom:1px solid var(--line)}
.u-pack-list button{display:flex;align-items:center;gap:18px;width:100%;min-height:84px;padding:14px 12px;background:transparent;text-align:left;border-radius:6px;color:var(--text)}
.u-pack-list button::before{content:counter(pack-step,decimal-leading-zero);font:500 25px var(--display);color:var(--accent);font-variant-numeric:tabular-nums;width:28px;flex:none}
.u-pack-item-copy{min-width:0;flex:1}.u-pack-item-copy strong{display:block;font-size:14px;font-weight:600;text-wrap:pretty}
.u-pack-item-copy>span{display:block;font-size:12px;color:var(--muted);margin-top:4px;line-height:1.6;text-wrap:pretty}
.u-pack-item-meta{display:flex;align-items:center;justify-content:flex-end;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:12px;flex:none}
.u-pack-done{color:var(--accent)}.u-pack-chevron{font-size:17px;color:var(--accent)}
.u-pack-footer{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-top:10px}
.u-pack-footer p{color:var(--muted);font-size:12px;line-height:1.7;max-width:70ch;margin:4px 0}
.u-verification{font-size:12px;line-height:1.5;padding:2px 7px;border:1px solid var(--line);border-radius:4px;color:var(--muted)}
.u-verification.verified{color:var(--accent);border-color:var(--accent)}.u-verification.invalid{border-style:dashed;color:var(--text)}
.u-lesson-status{margin:12px 0;font-size:12px;line-height:1.8;color:var(--muted);border-left:2px solid var(--line);padding-left:12px;max-width:75ch}
.u-lesson-status strong{margin-right:10px;color:var(--text);font-weight:600}
.u-lesson-status.verified{border-color:var(--accent)}.u-lesson-status.invalid{border-left-style:dashed}
.u-lesson-tools{display:flex;gap:8px 16px;flex-wrap:wrap;margin:16px 0 8px}
.u-lesson-tools button{min-height:44px;padding:8px 12px;border:1px solid var(--line);border-radius:7px;background:var(--panel);color:var(--accent);font-size:13px}
.u-lesson-tools [data-report-lesson]{color:var(--muted)}
.u-share-fallback{padding:12px;background:var(--soft);border-radius:8px;margin:12px 0}
.u-share-fallback label{display:block;margin-bottom:8px;font-size:12px;color:var(--muted)}
.u-share-fallback input{width:100%;min-height:44px;padding:9px 10px;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:6px;font-size:13px}
.u-practice-note{font-size:12px;color:var(--muted);margin:12px 0 0;line-height:1.7}
#lesson-action-status{font-size:12px;color:var(--accent);margin:0}#lesson-action-status:empty{display:none}
@media(max-width:650px){
 .u-learning-pack{padding:22px 0;margin-top:22px}.u-learning-pack>h2{font-size:20px}
 .u-pack-suggestions{gap:8px}.u-pack-suggestions button{flex:1 1 calc(50% - 8px);gap:8px;padding:9px;min-width:0;font-size:12px}.u-pack-suggestions img{width:28px;height:28px}.u-pack-suggestions button>span:last-child{margin-left:auto}
 .u-pack-overview{align-items:flex-start;flex-direction:column;gap:12px}.u-pack-overview h3{font-size:16px}
 .u-pack-list button{gap:10px;padding:13px 2px;align-items:flex-start;flex-wrap:wrap}.u-pack-list button::before{width:24px;font-size:23px;align-self:flex-start}
 .u-pack-item-copy{flex-basis:calc(100% - 52px)}.u-pack-item-copy strong{font-size:14px}.u-pack-item-meta{margin-left:34px;justify-content:flex-start;gap:10px}.u-pack-chevron{margin-left:auto}
 .u-pack-footer{display:block}.u-pack-footer .u-pack-secondary{padding-top:8px}
 .u-lesson-tools{gap:8px}.u-lesson-tools button{flex:1 1 auto;font-size:12px;padding-inline:9px}
}