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5px;background:#000000bd;border-radius:4px;font-size:var(--fs-xs);font-variant-numeric:tabular-nums;color:#f8f8f8;line-height:1.4}.rprog{position:absolute;inset:auto 0 0 0;height:3px;background:#00000080}.rprog-fill{height:100%;background:var(--active)}.rthumb[data-done="1"] .rprog-fill{width:100%!important}.rbody{min-width:0;padding-top:2px}.rtitle{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:var(--fs-sm);line-height:var(--lh-tight);color:var(--t1)}.rmeta{display:flex;align-items:center;gap:6px;margin-top:6px;font-size:var(--fs-xs);color:var(--t3)}.rcheck{color:var(--active);display:inline-flex}.rcheck svg{width:13px;height:13px}.rrow[aria-current=true] .rmeta{color:var(--active)}.rthumb[data-kind=quiz]{display:grid;place-items:center;background:var(--raised);border:1px solid var(--hair)}.av{flex:none;display:grid;place-items:center;width:var(--av-size, 36px);height:var(--av-size, 36px);border-radius:50%;font-size:var(--fs-xs);font-weight:600;letter-spacing:.02em;background:oklch(.38 .09 var(--av-h, 240));color:oklch(.95 .03 var(--av-h, 240));-webkit-user-select:none;user-select:none}:root[data-mode=light] .av,:root:not([data-mode=dark]) .av{background:oklch(.88 .06 var(--av-h, 240));color:oklch(.36 .1 var(--av-h, 240))}@media (prefers-color-scheme: dark){:root:not([data-mode=light]) .av{background:oklch(.38 .09 var(--av-h, 240));color:oklch(.95 .03 var(--av-h, 240))}}.av[data-size=lg]{--av-size: 44px;font-size:var(--fs-sm)}.av[data-size=sm]{--av-size: 28px}.cmt{display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;padding:16px 0 0;position:relative}.cmt>.av{--av-size: 40px}.cmt[data-threaded="1"]:before{content:"";position:absolute;left:calc(var(--av-size, 40px) / 2 - 1px);top:calc(16px + var(--av-size, 40px) + 6px);bottom:22px;width:2px;border-radius:2px;background:var(--hair)}.cmt-main{min-width:0}.cmt-head{display:flex;align-items:baseline;gap:6px;flex-wrap:wrap;margin-bottom:2px}.cmt-name{font-size:13px;font-weight:600;color:var(--t1);letter-spacing:-.01em}.cmt-when{font-size:12px;color:var(--t3)}.cmt-seek{font-family:var(--font-mono);font-size:var(--fs-xs);font-variant-numeric:tabular-nums;color:var(--active);background:none;border:0;padding:0;cursor:pointer}.cmt-seek:hover{text-decoration:underline}.cmt-body{font-size:14px;line-height:1.45;color:var(--t1);overflow-wrap:anywhere;white-space:pre-wrap;margin:0}.cmt-acts{display:flex;align-items:center;gap:2px;margin-top:6px;flex-wrap:wrap}.cmt-act{min-height:32px;padding:0 10px;border-radius:999px;background:none;border:0;font:inherit;font-size:12px;font-weight:600;color:var(--t3);cursor:pointer}.cmt-act:hover{color:var(--t1);background:var(--raised)}.cmt-expand{display:inline-flex;align-items:center;gap:6px;min-height:32px;padding:0 10px 0 0;border-radius:999px;margin-top:2px;background:none;border:0;font:inherit;font-size:13px;font-weight:600;color:var(--active);cursor:pointer}.cmt-foot{display:flex;align-items:center}.cmt-expand:hover{background:color-mix(in oklab,var(--active),transparent 88%)}.cmt-expand svg{width:12px;height:12px;transition:transform var(--t-fast) var(--ease)}.cmt-expand[aria-expanded=true] svg{transform:rotate(180deg)}.cmt-replies{list-style:none;margin:4px 0 0;padding:0}.cmt-replies[hidden]{display:none}.cmt-reply{display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px;padding:8px 0}.cmt-reply .av{--av-size: 24px}.cmt[data-pending="1"]{opacity:.62}.cmt[data-failed="1"] .cmt-body{color:var(--t3)}.cmt-retry{min-height:var(--tap);background:none;border:0;padding:0;font:inherit;font-size:var(--fs-xs);color:var(--active);cursor:pointer}.plist{list-style:none;margin:0;padding:0}.psection{padding:18px var(--pad) 8px;font-size:var(--fs-xs);letter-spacing:.06em;text-transform:uppercase;color:var(--t3)}.prow{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:start;width:100%;min-height:72px;padding:14px var(--pad);border-bottom:1px solid var(--hair);background:none;border-inline:0;border-top:0;text-align:start;color:inherit;font:inherit;cursor:pointer;transition:background var(--t-fast) var(--ease)}.prow:hover,.prow:active{background:var(--raised)}.prow-main{min-width:0;display:flex;flex-direction:column;align-items:flex-start}.prow-title{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:var(--fs-md);line-height:var(--lh-tight);color:var(--t1)}.prow-preview{margin-top:5px;font-size:var(--fs-sm);color:var(--t3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.prow-side{display:flex;flex-direction:column;align-items:flex-end;gap:8px;flex:none;padding-top:2px}.prow-when{font-size:var(--fs-xs);color:var(--t3);white-space:nowrap}.prow-dot{width:9px;height:9px;border-radius:50%;background:var(--active)}.prow-dot[hidden]{display:none}.prow-watch{display:inline-flex;align-items:center;gap:5px;margin-top:6px;font-size:var(--fs-xs);color:var(--active)}.pres{display:flex;align-items:center;gap:10px;padding:12px 0;border-top:1px solid var(--hair);font-size:var(--fs-sm);color:var(--t3)}.pres-faces{display:flex}.pres-faces .av{--av-size: 26px;margin-inline-start:-8px;box-shadow:0 0 0 2px var(--ground)}.pres-faces .av:first-child{margin-inline-start:0}.face{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:14px;align-items:center;padding:8px 0 10px;border-top:1px solid var(--hair)}.face-name{display:block;font-size:var(--fs-sm);color:var(--t1)}.face-line{display:block;font-size:var(--fs-xs);color:var(--t3);margin-top:3px}.face-act{min-height:var(--tap);background:none;border:0;padding:0;font:inherit;font-size:var(--fs-sm);color:var(--active);cursor:pointer}.ovf{position:relative;flex:none}.ovf-btn{width:var(--tap);height:var(--tap);display:grid;place-items:center;background:none;border:0;padding:0;color:var(--t3);cursor:pointer;border-radius:50%}.ovf-btn:hover{color:var(--t1);background:var(--raised)}.ovf-menu{position:absolute;inset-inline-end:0;top:calc(100% + 4px);z-index:20;min-width:190px;padding:6px;background:var(--panel);border:1px solid var(--hair);border-radius:10px;box-shadow:0 10px 30px #00000047}.ovf-menu[hidden]{display:none}.ovf-item{display:block;width:100%;min-height:var(--tap);padding:10px 12px;background:none;border:0;border-radius:7px;text-align:start;font:inherit;font-size:var(--fs-sm);color:var(--t2);cursor:pointer}.ovf-item:hover{background:var(--raised);color:var(--t1)}:root{--danger: oklch(.62 .17 22)}:root[data-mode=light]{--danger: oklch(.5 .19 22)}.ovf-item[data-danger]{color:var(--danger)}.sk{background:linear-gradient(90deg,var(--raised) 0%,var(--line) 50%,var(--raised) 100%);background-size:200% 100%;animation:skm 1.15s linear infinite;border-radius:6px}@keyframes skm{to{background-position:-200% 0}}@media (prefers-reduced-motion: reduce){.sk{animation:none}}.sk-rrow{display:grid;grid-template-columns:auto 1fr;gap:12px;padding:8px 10px}.sk-thumb{width:128px;height:72px;border-radius:8px}.sk-line{height:12px;margin-bottom:8px}.sk-line[data-w=short]{width:42%}.sk-prow{display:grid;grid-template-columns:auto 1fr;gap:12px;min-height:72px;padding:14px var(--pad);align-items:center}.sk-av{width:44px;height:44px;border-radius:50%}.tabpane[hidden]{display:none!important}.llist,.plist{content-visibility:auto;contain-intrinsic-size:0 480px}.plist-wrap{padding-block:6px 24px}.plist-wrap>.up{margin:6px var(--pad) 10px}.plist-wrap .cmt{padding-inline:var(--pad)}.app.reduce-motion .sk,.app.smooth-air .sk{animation:none}.app.reduce-motion .cmt-expand svg,.app.smooth-air .cmt-expand svg{transition:none}.app.reduce-motion .rrow,.app.smooth-air .rrow,.app.reduce-motion .prow,.app.smooth-air .prow{transition:none}.ref-mod{--accent: var(--active);--accent-soft: color-mix(in oklab, var(--active) 14%, transparent);--hair: color-mix(in srgb, var(--line) 58%, transparent);--sans: var(--font-ui);--mono: var(--font-mono);font:15px/1.55 var(--font-ui);--r: 13px;--wrap: 1010px;--video: oklch(.16 .02 255);--glow: none}.ref-mod 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env(safe-area-inset-bottom,0px));transform:translate(-50%);z-index:40;display:flex;gap:4px;padding:4px;border-radius:99px;background:#10171feb;color:#eee;box-shadow:0 10px 30px #0000004d;font-size:13px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.ref-mod .demo button{padding:7px 14px;border-radius:99px;white-space:nowrap}.ref-mod .demo button[aria-pressed=true]{background:#eee;color:#10171f;font-weight:600}.ref-mod .demo .sep{width:1px;background:#ffffff2e;margin:6px 2px}.ref-mod .back{display:inline-flex;align-items:center;gap:6px;color:var(--t2);font-size:14px;padding-block:2px 14px}.ref-mod .back:hover{color:var(--t1)}.ref-mod .lesson{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px;align-items:start;padding-bottom:110px}.ref-mod .col{display:flex;flex-direction:column;gap:14px;min-width:0}.ref-mod .player{position:relative;border-radius:var(--r);overflow:hidden;background:var(--video);aspect-ratio:16/9;max-height:62vh;width:100%;-webkit-user-select:none;user-select:none}.ref-mod .frame{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;background:radial-gradient(80% 90% at 30% 20%,#142a41,#03080f);color:#dfe6eb}.ref-mod .board{text-align:center}.ref-mod .board .eq{font:500 clamp(28px,6vw,54px)/1.1 var(--mono);letter-spacing:-.02em}.ref-mod .board .cap{font:12px var(--mono);letter-spacing:.14em;text-transform:uppercase;opacity:.55;margin-top:10px}.ref-mod .bigplay{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;transition:opacity .2s}.ref-mod .bigplay span{width:64px;height:64px;border-radius:50%;display:grid;place-items:center;background:#ffffff24;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.ref-mod .player.playing .bigplay{opacity:0;pointer-events:none}.ref-mod .ctrl{position:absolute;left:0;right:0;bottom:0;padding:26px 14px 10px;background:linear-gradient(transparent,#000000b8);color:#fff;transition:opacity .25s}.ref-mod .player.playing:not(:hover):not(.noting) .ctrl{opacity:0}.ref-mod .scrub{position:relative;height:22px;display:flex;align-items:center;cursor:pointer}.ref-mod .rail{position:absolute;left:0;right:0;height:4px;border-radius:4px;background:#ffffff40}.ref-mod .fill{position:absolute;left:0;height:4px;border-radius:4px;background:#68a8f4}.ref-mod .knob{position:absolute;width:12px;height:12px;border-radius:50%;background:#fff;transform:translate(-50%);box-shadow:0 1px 4px #00000080}.ref-mod .mk{position:absolute;top:50%;transform:translate(-50%,-50%);z-index:2;display:grid;place-items:center;width:16px;height:22px}.ref-mod .mk i{display:block;width:8px;height:6px;border:1.5px solid #fff;border-radius:1px;background:#68a8f4}.ref-mod .mk.q i{width:7px;height:7px;transform:rotate(45deg);background:#ac8ff8}.ref-mod .mk.cp i{background:#60dbd4}.ref-mod .mk.new i{animation:press .5s var(--ease)}.ref-mod .mk .tip{position:absolute;bottom:24px;left:50%;transform:translate(-50%);background:#080e16f5;border:1px solid oklch(1 0 0 / .12);border-radius:10px;padding:8px 10px;width:max-content;max-width:220px;font-size:12.5px;line-height:1.35;opacity:0;pointer-events:none;transition:opacity .15s;text-align:left}.ref-mod .mk .tip small{display:block;font:10.5px var(--mono);opacity:.65;margin-bottom:2px;letter-spacing:.04em}.ref-mod .mk:hover .tip{opacity:1}.ref-mod .bar{display:flex;align-items:center;gap:6px;margin-top:4px}.ref-mod .cb{width:34px;height:34px;display:grid;place-items:center;border-radius:8px}.ref-mod .cb:hover{background:#ffffff1f}.ref-mod .time{font:12.5px var(--mono);opacity:.9;margin-left:4px;font-variant-numeric:tabular-nums}.ref-mod .grow{flex:1}.ref-mod .title-row{display:flex;align-items:center;gap:12px}.ref-mod .title-row h1{font-size:21px;font-weight:600;margin:0;letter-spacing:-.01em;flex:1;min-width:0}.ref-mod .icon-btn{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;color:var(--t2);border:1px solid var(--line);background:var(--panel)}.ref-mod .icon-btn:hover{color:var(--t1)}.ref-mod .icon-btn[aria-pressed=true]{color:var(--accent)}.ref-mod .icon-btn[aria-pressed=true] svg path{fill:currentColor}.ref-mod .seal{width:40px;height:40px;display:grid;place-items:center;color:var(--t3)}.ref-mod .seal[data-on=true]{color:var(--accent)}.ref-mod .seal[data-on=true] svg{animation:press .5s var(--ease)}.ref-mod .card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.ref-mod .tabs{display:flex;align-items:center;gap:20px;padding:0 18px;border-bottom:1px solid var(--hair)}.ref-mod .tab{padding:14px 0 12px;color:var(--t3);font-size:15.5px;border-bottom:2px solid transparent;margin-bottom:-1px;display:flex;gap:6px;align-items:baseline}.ref-mod .tab small{font:12px var(--mono);color:var(--t3)}.ref-mod .tab[aria-selected=true]{color:var(--t1);border-color:var(--accent)}.ref-mod .tabs .link{margin-left:auto;font-size:13px;color:var(--t2)}.ref-mod .chips{display:flex;gap:6px;padding:12px 18px 4px;flex-wrap:wrap}.ref-mod .chip{font-size:12.5px;padding:5px 11px;border-radius:99px;border:1px solid var(--line);color:var(--t2)}.ref-mod .chip[aria-pressed=true]{background:var(--accent-soft);border-color:transparent;color:var(--t1)}.ref-mod .chip .dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--copilot);margin-right:6px;vertical-align:1px}.ref-mod .log{list-style:none;margin:0;padding:6px 8px 10px}.ref-mod .entry{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;padding:10px;border-radius:10px}.ref-mod .entry:hover{background:var(--raised)}.ref-mod .entry .st{display:block;line-height:0}.ref-mod .entry .st:hover{transform:rotate(0) scale(1.04)}.ref-mod .entry p{margin:0;font-size:14.5px;line-height:1.45;text-wrap:pretty}.ref-mod .entry .who{font-size:12px;color:var(--t3);margin-top:2px}.ref-mod .entry .who.cp{color:var(--copilot)}.ref-mod .entry .del{opacity:0;color:var(--t3);width:32px;height:32px;display:grid;place-items:center;border-radius:8px}.ref-mod .entry:hover .del,.ref-mod .entry .del:focus-visible{opacity:1}.ref-mod .entry .del:hover{color:var(--t1);background:var(--line)}.ref-mod .entry.fresh .st svg{animation:press .55s var(--ease)}.ref-mod .empty{padding:26px 18px 30px;color:var(--t3);font-size:14px;text-align:center}.ref-mod .cmt{display:flex;gap:12px;padding:12px 10px}.ref-mod .cmt p{margin:2px 0 0;font-size:14.5px}.ref-mod .cmt .n{font-size:13px;font-weight:600}.ref-mod .cmt .n span{font-weight:400;color:var(--t3);margin-left:6px}.ref-mod .next-h{display:flex;align-items:center;justify-content:space-between;padding:14px 16px 10px}.ref-mod .next-h b{font-size:14px;font-weight:600}.ref-mod .next-h span{font:12px var(--mono);color:var(--t3)}.ref-mod .next-h .tog{display:none}.ref-mod .next ol{list-style:none;margin:0;padding:0 8px 10px}.ref-mod .nx{display:grid;grid-template-columns:92px 1fr auto;gap:10px;align-items:center;padding:7px;border-radius:10px;width:100%;text-align:left}.ref-mod .nx:hover{background:var(--raised)}.ref-mod .nx[aria-current=true]{background:var(--accent-soft)}.ref-mod .thumb{aspect-ratio:16/9;border-radius:7px;background:radial-gradient(90% 90% at 30% 20%,#192f46,#060c13);display:grid;place-items:end;padding:4px;font:10.5px var(--mono);color:#e4e4e4}.ref-mod .nx .t{font-size:13.5px;line-height:1.3}.ref-mod .nx .d{font-size:11.5px;color:var(--t3)}.ref-mod .nx .now{font:11px var(--mono);color:var(--accent)}.ref-mod .nx .sm{color:var(--accent);line-height:0}.ref-mod .nb{position:fixed;z-index:30;width:min(520px,calc(100vw - 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.qlights{padding-bottom:26px}.mscreen .qtext{font-size:var(--fs-xl,27px);font-weight:700;letter-spacing:-.5px;line-height:1.24;margin:0 0 26px;max-width:34ch;text-wrap:balance}.mscreen .qopts{display:grid;gap:10px;max-width:44ch}.mscreen .qopt{display:grid;grid-template-columns:24px minmax(0,1fr);gap:14px;align-items:center;text-align:left;font-family:inherit;font-size:var(--fs-md,17.5px);color:var(--t1);background:none;border:1px solid var(--line);border-radius:11px;padding:16px 18px;cursor:pointer;min-height:var(--tap,44px)}.mscreen .qopt:hover:not(:disabled){border-color:var(--t3)}.mscreen .qopt:disabled{cursor:default}.mscreen .qopt.right{border-color:var(--active);color:var(--t1)}.mscreen .qopt.chosen{border-color:var(--calm,var(--t3));color:var(--t2)}.mscreen .qmark{display:grid;place-items:center;height:24px}.mscreen .qmark svg{width:16px;height:16px;color:var(--active)}.mscreen .qwhy{border-top:1px solid var(--hair);margin-top:28px;padding-top:22px;max-width:56ch}.mscreen .qverdict{font-size:var(--fs-lg,19px);font-weight:700;margin:0 0 8px}.mscreen .qexplain{font-size:var(--fs-md,17.5px);color:var(--t2);line-height:1.6;margin:0 0 22px}@keyframes ytspin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.mscreen .pspin{animation-duration:2.4s}}.next-done{flex:none;min-height:var(--tap);padding:0 14px;background:none;border:1px solid var(--line);border-radius:999px;font:inherit;font-size:var(--fs-sm);color:var(--t2);cursor:pointer}.next-done:hover{color:var(--t1);border-color:var(--t3)}.next-done[aria-pressed=true]{color:var(--active);border-color:var(--active)}.player-slot[data-empty="1"]{display:grid;place-items:center;font-size:var(--fs-sm);color:var(--t3)}.app.reduce-motion .player-layer,.app.smooth-air .player-layer{transition:none}.app.reduce-motion .pbanner,.app.smooth-air .pbanner{animation:none}.app.reduce-motion .yttrack .ytdot,.app.smooth-air .yttrack 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.item[data-state=current]{background:color-mix(in srgb,var(--active) 9%,transparent);border-color:color-mix(in srgb,var(--active) 38%,transparent)}.mscreen .lead{flex:0 0 auto;width:58px;height:34px;border-radius:5px;overflow:hidden;position:relative;background:linear-gradient(135deg,color-mix(in srgb,var(--active) 30%,var(--sunk)),var(--sunk));border:1px solid var(--edge)}.mscreen .lead img{width:100%;height:100%;object-fit:cover;display:block}.mscreen .lead.mark{display:grid;place-items:center;background:var(--sunk);box-shadow:var(--recess)}.mscreen .lead.mark svg{display:block;color:var(--t2)}.mscreen .lead.quiz-thumb{display:grid;grid-template-columns:auto 1fr;gap:5px;align-items:center;padding:5px 6px;background:var(--raised);box-shadow:none}.mscreen .quiz-thumb__sheet{display:grid;gap:2px}.mscreen .quiz-thumb__sheet span{display:flex;gap:2px}.mscreen .quiz-thumb__sheet i{width:5px;height:5px;border-radius:50%;border:1px solid var(--t3)}.mscreen .quiz-thumb__sheet i.on{background:var(--active);border-color:var(--active)}.mscreen .quiz-thumb__count{font-family:var(--font-mono);font-size:9px;line-height:1.1;color:var(--t2);text-align:right}.mscreen .quiz-thumb__count b{display:block;font-size:13px;color:var(--t1);font-weight:600}.mscreen .imain{flex:1;min-width:0}.mscreen .iname{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:14.5px;font-weight:500;line-height:1.32;color:var(--t1)}.mscreen .imeta{display:block;font-size:12.5px;color:var(--t2);margin-top:1px}.mscreen .istat{flex:0 0 auto;display:flex;align-items:center;gap:9px;font-size:13px;color:var(--t2);white-space:nowrap;justify-content:flex-end;margin-right:24px}.mscreen .go{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:0;border-radius:7px;background:var(--active);color:var(--on-mark);font-family:var(--font-ui);font-weight:600;font-size:13px;line-height:1;padding:8px 13px;cursor:pointer}.mscreen .go.ghost{background:transparent;color:var(--active);border:1px solid color-mix(in srgb,var(--active) 45%,transparent)}.mscreen .score{font-variant-numeric:tabular-nums}@media (max-width: 560px){.mscreen .kids{padding:0 var(--card-pad) 10px calc(var(--card-pad) + 11px)}.mscreen .istat{margin-right:0}}@media (max-width: 560px){.mscreen .mcard{border-radius:0;border-left:0;border-right:0;width:calc(100vw / var(--font-scale, 1));margin-inline:calc(50% - (50vw / var(--font-scale, 1)))}.mscreen .chead{grid-template-columns:minmax(0,1fr) auto;grid-template-areas:none;gap:10px;padding:15px var(--card-pad)}.mscreen .chead .cend{grid-area:auto;grid-column:1;grid-row:2;justify-self:start}.mscreen .chead .chv{grid-area:auto;grid-column:2;grid-row:1 / -1}}.mscreen .libtab{display:block}.mscreen .lsec+.lsec{border-top:1px solid var(--edge, var(--hair));margin-top:6px}.mscreen .lsec-head{display:flex;align-items:center;gap:16px;padding:18px var(--card-pad) 10px}.mscreen .lsec-id{min-width:0;flex:1 1 auto}.mscreen .lsec-name{margin:0;font-size:25px;font-weight:700;line-height:1.05;color:var(--t1);letter-spacing:-.01em}.mscreen .lsec-sub{margin:2px 0 0;font-size:var(--fs-sm);color:var(--t2)}.mscreen .score{font-variant-numeric:tabular-nums;color:var(--t2)}@media (max-width: 560px){.mscreen .lsec-head{gap:10px;padding:15px var(--card-pad) 8px}.mscreen .lsec-name{font-size:21px}}.mscreen .hdr{padding:0 calc(var(--card-pad) + 1px)}.mscreen .hdr .up{padding-inline:0;color:var(--t1)}.sheet-scrim{position:fixed;top:0;right:0;bottom:0;left:0;z-index:60;display:grid;place-items:center;padding:20px;background:oklch(from var(--ground) l c h / .72);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.addpaper{width:min(460px,100%);max-height:86dvh;overflow-y:auto;display:grid;gap:14px;padding:18px;background:linear-gradient(var(--panel),var(--panel)),var(--ground);border:1px solid var(--line);border-radius:14px}.addpaper-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.addpaper-top h3{margin:0;font-size:15px;font-weight:500;color:var(--t1)}.addpaper-drop{display:grid;justify-items:center;gap:8px;padding:22px 16px;border:1px dashed var(--edge);border-radius:12px;background:var(--raised);color:var(--t2);font:inherit;font-size:14px;cursor:pointer;text-align:center}.addpaper-drop:hover{border-color:var(--active);color:var(--t1)}.addpaper-drop em{font-style:normal;font-size:13px;color:var(--t3)}.addpaper-f{display:grid;gap:5px;font-size:13px;color:var(--t3)}.addpaper-f input,.addpaper-f select{min-height:44px;padding:0 11px;font:inherit;font-size:14px;background:var(--raised);color:var(--t1);border:1px solid var(--line);border-radius:10px}.addpaper-work p,.addpaper-setup p{margin:0 0 6px;font-size:13px;line-height:1.5;color:var(--t2)}.addpaper-note{color:var(--t3)}.addpaper-bar{display:block;height:4px;border-radius:3px;background:var(--edge);overflow:hidden}.addpaper-bar i{display:block;height:100%;background:var(--active);transition:width .2s ease}.addpaper-setup{padding:12px;border-radius:10px;background:var(--raised);border:1px solid var(--line)}.addpaper-setup code{display:block;margin:8px 0;padding:9px 11px;font-family:var(--font-mono);font-size:13px;color:var(--t1);background:var(--sunk, var(--ground));border-radius:8px;overflow-x:auto}.addpaper-err{margin:0;font-size:13px;line-height:1.5;color:var(--t1)}.addpaper-foot{display:flex;gap:8px;justify-content:flex-end}.libempty{display:grid;gap:12px;justify-items:start;padding:18px 0 6px}.libempty p{margin:0;font-size:14px;line-height:1.55;color:var(--t2);max-width:52ch}.lsec-act{min-height:44px;padding:0 14px;border-radius:999px;background:none;border:1px solid var(--edge);color:var(--t2);font:inherit;font-size:13px;cursor:pointer}.lsec-act:hover{color:var(--t1);border-color:var(--edge-hi)}.ihair{display:block;height:2px;margin-top:6px;border-radius:2px;background:var(--edge);overflow:hidden}.ihair i{display:block;height:100%;background:var(--active)}.item[data-here] .iname{color:var(--t1)}.addpaper-scope{border:none;margin:0;padding:0;display:grid;gap:4px}.addpaper-scope legend{padding:0 0 6px;font-size:13px;color:var(--t3)}.scope-row{display:flex;align-items:flex-start;gap:10px;padding:10px 11px;min-height:44px;border-radius:10px;border:1px solid var(--line);background:var(--raised);cursor:pointer}.scope-row[data-on]{border-color:var(--active)}.scope-row input{position:absolute;opacity:0;width:0;height:0}.scope-tick{width:18px;height:18px;flex:none;margin-top:1px;border-radius:50%;border:1px solid var(--edge);display:grid;place-items:center;color:var(--on-active, var(--ground))}.scope-row[data-on] .scope-tick{background:var(--active);border-color:var(--active)}.scope-name b{display:block;font-size:14px;font-weight:500;color:var(--t1)}.scope-name em{font-style:normal;font-size:13px;color:var(--t3)}.addpaper-said{color:var(--t2)}.addpaper-work .q-btn{justify-self:start;margin-top:8px}.paper-state{display:grid;gap:12px;justify-items:start;max-width:52ch;margin:0 auto;padding:18vh var(--pad) 0}.paper-state h1{margin:0;font-size:22px;font-weight:500;color:var(--t1)}.paper-state p{margin:0;font-size:15px;line-height:1.6;color:var(--t2)}.paper-state .nextgo{margin-top:6px}.ref-mod .sub-go{all:unset;cursor:pointer;font:inherit;color:inherit;letter-spacing:inherit;border-radius:4px}.ref-mod .sub-go:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-color:color-mix(in oklab,currentColor 45%,transparent)}.ref-mod .sub-go:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.app[data-paper="1"] .mscreen{--paper-rule: color-mix(in oklab, var(--paper-edge) 26%, transparent)}.app[data-paper="1"] .instrow{gap:10px;padding-bottom:8px}.app[data-paper="1"] .ind>*{position:relative;background:transparent;border:1.25px solid var(--sketch-ink);border-radius:2px;box-shadow:none}.app[data-paper="1"] .ind>*:after{content:"";position:absolute;left:3px;right:3px;bottom:-5px;height:1px;background:repeating-linear-gradient(90deg,var(--sketch-ink) 0 3px,transparent 3px 6px);opacity:.55}.app[data-paper="1"] .g-arc{stroke:var(--sketch-ink);opacity:.9}.app[data-paper="1"] .g-tick{stroke:var(--sketch-ink);opacity:.8}.app[data-paper="1"] .g-needle line{stroke:var(--sketch-ink)}.app[data-paper="1"] .g-hub{fill:var(--sketch-ink)}.app[data-paper="1"] .gauge,.app[data-paper="1"] .sticker{background:transparent}.app[data-paper="1"] .sticker .band{background:transparent;color:var(--sketch-ink);border-bottom:1.25px solid var(--sketch-ink);padding:3px 0 2px}.app[data-paper="1"] .sticker[data-state=nodata] 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.cstat.is-taken{color:#e86154}.ref-lic .calts{display:inline-flex;gap:6px;margin-left:4px;vertical-align:middle}.ref-lic .calts button{font:600 11.5px var(--mono);letter-spacing:.1em;padding:3px 7px;border-radius:5px;border:1px solid var(--line);background:var(--raised);color:var(--t1);cursor:pointer}.ref-lic .calts button:hover{border-color:var(--accent);color:var(--accent)}.ref-lic .grow{margin:16px 20px 0;padding-top:14px;border-top:1px solid var(--hair);text-align:center}.ref-lic .grow p{margin:0;font-size:12.5px;color:var(--t3);line-height:1.5}.ref-lic .grow b{color:var(--t2);font-weight:600}.ref-lic .cin{width:120px;text-align:center;font:700 20px var(--sans);letter-spacing:.18em;text-transform:uppercase;background:var(--raised);border:0;border-radius:12px;padding:10px 8px;color:var(--t1)}.ref-lic .cin.on{box-shadow:inset 0 0 0 1.5px var(--accent)}.ref-lic .cin::placeholder{color:var(--t3);opacity:.6}.ref-lic .csym{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;color:var(--t2);background:color-mix(in oklab,var(--raised) 70%,transparent)}.ref-lic .csym.on{color:var(--accent);background:var(--accent-soft);box-shadow:inset 0 0 0 1.5px var(--accent)}.ref-lic .tag{background:none!important;box-shadow:none!important;border:0!important;border-radius:0!important;max-width:440px}.ref-lic .tag span{font-style:italic;font-size:15.5px;color:var(--t2);padding:4px 0}.ref-lic button.tag:hover span{color:var(--t1)}.ref-lic .barv{font:700 20px var(--mono);color:var(--accent);margin-left:auto}.ref-lic .barr{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:6px;border-radius:99px;margin:16px 0 8px;background:linear-gradient(90deg,var(--accent) var(--p,72%),var(--raised) var(--p,72%))}.ref-lic .barr::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:var(--accent);border:3px solid var(--ground);box-shadow:0 2px 6px #00000059;cursor:pointer}.ref-lic .barr::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:var(--accent);border:3px solid var(--ground);cursor:pointer}.ref-lic .barl{display:flex;justify-content:space-between;gap:12px;font:11px var(--mono);color:var(--t3)}.ref-lic .nlist{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:8px}.ref-lic .nlist li{display:flex;align-items:center;gap:10px;font-size:14.5px}.ref-lic .nlist li:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}.ref-lic .livs{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}.ref-lic .livs button{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:color-mix(in oklab,var(--raised) 60%,transparent)}.ref-lic .livs button i{width:26px;height:26px;border-radius:50%}.ref-lic .livs button.on{box-shadow:inset 0 0 0 1.6px var(--accent);background:var(--accent-soft)}.ref-lic #devwrap{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;background:#0000009e;display:flex;flex-direction:column;align-items:center;gap:10px;padding:18px;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.ref-lic #devwrap iframe{flex:1;border:0;border-radius:22px;background:var(--ground);box-shadow:0 30px 80px #00000080;max-width:100%}.ref-lic .devbar{display:flex;align-items:center;gap:14px;color:#fff;font:600 12px var(--mono);letter-spacing:.1em}.ref-lic .devbar button{font:inherit;letter-spacing:.06em;border:1px solid oklch(1 0 0 / .35);border-radius:99px;padding:5px 12px;color:#fff}@media (max-width:560px){.ref-lic .col h1{font-size:28px}.ref-lic .box{padding:16px}.ref-lic .sega{flex-wrap:wrap}.ref-lic .sega button{flex:1 1 auto;text-align:center}.ref-lic .pd{font-size:13.5px}.ref-lic .seg button{font-size:13px;padding:9px 4px}.ref-lic .stats b{font-size:18px}.ref-lic .stats span{font-size:11px}}.ref-lic 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0;width:min(300px,78vw);color:var(--t3)}.ref-lic .crow2 .barr{flex:1;margin:0}.ref-lic .maker{margin-top:16px;border-top:1px solid var(--hair);padding-top:18px;display:grid;grid-template-columns:minmax(0,220px) minmax(0,1fr);gap:22px}.ref-lic .maker[hidden]{display:none}.ref-lic .stpaper{border-radius:14px;background:var(--raised);display:grid;place-items:center;aspect-ratio:1;position:relative;overflow:hidden;align-self:start}.ref-lic .stpaper:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:repeating-linear-gradient(0deg,transparent 0 23px,var(--hair) 23px 24px);opacity:.55}.ref-lic .stpaper .big{position:relative;line-height:0}.ref-lic .stpaper .big.go svg{animation:press .45s var(--ease)}.ref-lic .ctl{display:flex;flex-direction:column;gap:14px;min-width:0}.ref-lic .ctl .lab{margin:0 0 7px}.ref-lic .opts{display:flex;gap:6px;flex-wrap:wrap}.ref-lic .opt{width:42px;height:42px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;color:var(--t2);line-height:0}.ref-lic .opt[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}.ref-lic .opt.txt{width:auto;padding:0 12px;font-size:13px;line-height:1}.ref-lic .opt.fnt{width:auto;padding:0 12px;line-height:1;font-size:16px;font-weight:700}.ref-lic .sw{width:30px;height:30px;border-radius:50%;border:3px solid var(--ground);box-shadow:0 0 0 1px var(--line)}.ref-lic .sw[aria-pressed=true]{box-shadow:0 0 0 2px var(--t1)}.ref-lic .fields{display:grid;grid-template-columns:110px 1fr;gap:10px}.ref-lic .fields label{display:flex;flex-direction:column;gap:6px;min-width:0}.ref-lic .fields input{font:600 14px var(--mono);letter-spacing:.08em;text-transform:uppercase;background:var(--raised);border:1px solid var(--line);border-radius:10px;padding:8px 11px;color:var(--t1);width:100%;min-width:0}.ref-lic .fields input:disabled{opacity:.4}.ref-lic .confirm{border:1px solid color-mix(in oklab,var(--accent) 45%,transparent);background:var(--accent-soft);border-radius:12px;padding:12px 14px;font-size:14px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}.ref-lic .confirm b{flex:1 1 200px;font-weight:500}.ref-lic .issue{display:flex;gap:10px;flex-wrap:wrap}.ref-lic .row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 0;border-top:1px solid var(--hair)}.ref-lic .row:first-of-type{border-top:0;padding-top:4px}.ref-lic .row b{display:block;font-weight:600;font-size:16px}.ref-lic .row span{color:var(--t3);font-size:14px}.ref-lic .del{color:var(--t3);font-size:14px;margin:6px 2px}.ref-lic .del u{color:var(--t2);text-underline-offset:4px}.ref-lic .sega{display:flex;gap:4px;padding:4px;border:1px solid var(--line);border-radius:12px;background:var(--raised);margin:12px 0 4px;flex-wrap:wrap}.ref-lic .sega button{padding:8px 14px;border-radius:9px;font-size:14px;color:var(--t2)}.ref-lic .sega button[aria-pressed=true]{background:var(--ground);color:var(--t1);box-shadow:inset 0 0 0 1px var(--line)}.ref-lic .ph{font-size:16px;font-weight:600;margin:0}.ref-lic .pd{color:var(--t2);font-size:14px;margin:4px 0 0}.ref-lic .inp{width:100%;background:var(--raised);border:1px solid var(--line);border-radius:10px;padding:11px 14px;color:var(--t1);font:inherit;font-size:14.5px;margin-top:6px}.ref-lic .tog{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding-top:16px;margin-top:16px;border-top:1px solid var(--hair)}.ref-lic .sw2{width:48px;height:28px;border-radius:99px;background:var(--raised);border:1px solid var(--line);position:relative;flex:none;transition:background .2s}.ref-lic .sw2:after{content:"";position:absolute;left:4px;top:4px;width:18px;height:18px;border-radius:50%;background:var(--t3);transition:transform .25s var(--ease),background .2s}.ref-lic .sw2[aria-checked=true]{background:var(--accent)}.ref-lic .sw2[aria-checked=true]:after{transform:translate(20px);background:var(--ground)}.ref-lic .new{font:600 10px var(--mono);letter-spacing:.1em;color:var(--accent);border:1px solid color-mix(in oklab,var(--accent) 50%,transparent);border-radius:99px;padding:1px 7px;margin-left:8px;vertical-align:2px}.ref-lic .scrim{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;background:#00000080;display:grid;place-items:center;padding:16px;opacity:0;pointer-events:none;transition:opacity .25s var(--ease)}.ref-lic .scrim.open{opacity:1;pointer-events:auto}.ref-lic .sheet{width:min(460px,100%);max-height:calc(100vh - 32px);overflow:auto;border-radius:20px;box-shadow:0 30px 80px #00000080;transform:translateY(14px) scale(.98);transition:transform .35s var(--ease);position:relative}.ref-lic .scrim.open .sheet{transform:none}.ref-lic .sheet .adm{right:52px;top:14px}.ref-lic .x{position:absolute;right:10px;top:10px;z-index:2;width:32px;height:32px;border-radius:50%;background:#00000052;color:#fff;display:grid;place-items:center}.ref-lic .vtag{position:absolute;left:12px;top:12px;z-index:2;font:600 10.5px var(--mono);letter-spacing:.1em;color:#fff;background:#00000052;padding:4px 10px;border-radius:99px}.ref-lic .toast{position:fixed;left:50%;top:18px;transform:translate(-50%,-20px);opacity:0;z-index:60;background:var(--t1);color:var(--ground);padding:9px 16px;border-radius:99px;font-size:13.5px;transition:all .3s var(--ease);pointer-events:none;white-space:nowrap}.ref-lic .toast.show{opacity:1;transform:translate(-50%)}.ref-lic .demo{flex-wrap:wrap;justify-content:center;max-width:calc(100vw - 24px);position:fixed;left:50%;bottom:calc(16px + env(safe-area-inset-bottom,0px));transform:translate(-50%);z-index:40;display:flex;gap:4px;padding:4px;border-radius:99px;background:#10171feb;color:#eee;box-shadow:0 10px 30px #0000004d;font-size:13px}.ref-lic .demo button{padding:7px 14px;border-radius:99px;white-space:nowrap}@media (max-width:600px){.ref-lic .doc,.ref-lic .maker{grid-template-columns:1fr}.ref-lic .stpaper{max-width:240px;width:100%;justify-self:center}.ref-lic .rr .lbl{display:none}.ref-lic .box{padding:18px}.ref-lic .lbody{padding:0 16px 16px}}@media (prefers-reduced-motion:reduce){.ref-lic *{animation:none!important;transition:none!important}}.ff{min-height:100dvh;box-sizing:border-box;display:flex;align-items:center;justify-content:center;padding:40px 22px 64px}.ff-col{width:100%;max-width:440px}@media (prefers-reduced-motion: no-preference){.app:not(.smooth-air) .ff-col{animation:ff-in .42s cubic-bezier(.22,1,.36,1) both}}@keyframes ff-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.ff-eyebrow{margin:0 0 10px;font:500 12px/1 var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--t3)}.ff-title{margin:0 0 8px;font:600 clamp(24px,5vw,30px)/1.15 var(--font-ui);letter-spacing:-.01em;color:var(--t1)}.ff-sub{margin:0 0 26px;font-size:15px;line-height:1.55;color:var(--t2);max-width:46ch}.ff-l{display:block;margin:0 0 6px;font-size:14px;font-weight:500;color:var(--t2)}.ff-h{margin:-2px 0 10px;font-size:14px;line-height:1.5;color:var(--t3);max-width:46ch}.ff-in{display:block;width:100%;box-sizing:border-box;margin:0 0 22px;padding:12px 15px;background:var(--raised);border:1px solid var(--line);border-radius:12px;color:var(--t1);font:16px var(--font-ui)}.ff-code{display:block;width:6.5ch;margin:0 0 8px;padding:10px 0;text-align:center;background:var(--raised);border:1px solid var(--line);border-radius:12px;color:var(--t1);font:26px var(--font-mono);letter-spacing:.16em;text-transform:uppercase}.ff-in:focus,.ff-code:focus{outline:2px solid var(--active);outline-offset:1px}.ff-in[aria-invalid=true]{border-color:var(--active)}.ff-note{margin:-14px 0 18px;font-size:14px;line-height:1.45;color:var(--t1)}.ff-code+.ff-note{margin:0 0 12px}.ff-go{display:block;width:100%;min-height:48px;margin-top:22px;border:0;border-radius:999px;cursor:pointer;background:var(--active-fill);color:var(--ground);font:600 16px var(--font-ui);transition:transform .18s cubic-bezier(.22,1,.36,1),filter .18s}.ff-go:hover{filter:brightness(1.06)}.ff-go:active{transform:scale(.98)}.ff-go:disabled{background:var(--raised);color:var(--t3);cursor:default;filter:none;transform:none}.ff-after{margin:12px 0 0;font-size:13px;color:var(--t3);text-align:center}.app[data-paper="1"] .ff-go:not(:disabled){background:transparent;color:var(--active);border:1.5px solid var(--active);border-radius:2px}:root{--house-fill: var(--panel);--house-line: 1px solid var(--edge, var(--hair));--house-radius: 14px;--house-pad: 20px;--house-gap: 14px;--house-shadow: 0 1px 2px oklch(0 0 0 / .05), 0 10px 28px oklch(0 0 0 / .06)}@media (min-width: 768px){:root{--house-pad: 24px;--house-gap: 16px}}.app[data-variant=night]{--house-shadow: 0 1px 0 var(--edge-hi, transparent), 0 12px 30px oklch(0 0 0 / .28)}.app[data-aur="1"]{--house-shadow: 0 1px 0 var(--edge-hi, transparent);--house-fill: var(--panel)}.app[data-paper="1"]{--house-shadow: none;--house-radius: 0px}.house{background:var(--house-fill);border:var(--house-line);border-radius:var(--house-radius);box-shadow:var(--house-shadow);padding:var(--house-pad)}.house-in{background:var(--raised);border:var(--house-line);border-radius:calc(var(--house-radius) - 4px);box-shadow:none;padding:calc(var(--house-pad) - 6px)}.app[data-paper="1"] .house-in{border-radius:0}.house-stack{display:grid;gap:var(--house-gap)}.house[data-press]{cursor:pointer;transition:background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease)}.house[data-press]:hover{background:var(--raised);border-color:var(--line)}.house[data-press]:focus-visible{outline:2px solid var(--active);outline-offset:2px}.house-wrap{padding-inline:var(--pad)}:root{--player-max-h: 100vh;--player-max-w: 100%;--over-video: oklch(1 0 0);--lbox-r: 13px}.app[data-paper="1"]{--lbox-r: 2px}@media (min-width: 768px){:root{--player-max-h: 52vh;--player-max-w: 100%}}@media (min-width: 1120px){:root{--player-max-h: 64vh;--player-max-w: 1180px}}.player-slot{position:relative;width:min(100%,var(--player-max-w),calc(var(--player-max-h) * 16 / 9));aspect-ratio:16 / 9;background:var(--raised);border-radius:var(--lbox-r);overflow:hidden}.lesson-body{padding-inline:var(--pad);width:min(100%,var(--player-max-w),calc(var(--player-max-h) * 16 / 9 + var(--pad) * 2))}.lessonpage{padding-block:18px calc(64px + var(--mini-h, 0px))}.up{display:inline-flex;align-items:center;gap:8px;min-height:var(--tap);padding-inline:var(--pad);background:none;border:0;font:inherit;font-size:var(--fs-sm);color:var(--t3);text-decoration:none;cursor:pointer}.up:hover{color:var(--t1)}.up svg{width:16px;height:16px;flex:none}[dir=rtl] .up svg{transform:scaleX(-1)}.lesson-head{padding-inline:var(--pad);margin:0 0 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var(--ease)}.opt:hover,.opt:active{background:var(--raised)}.opt-l{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;border:1px solid var(--edge);font-family:var(--font-mono);font-size:var(--fs-sm);font-weight:500;color:var(--t2);flex:none;transition:background var(--t-fast) var(--ease),color var(--t-fast) var(--ease)}.opt-t{font-size:var(--fs-md);line-height:var(--lh-body);color:var(--t1)}.opt[aria-pressed=true]{border-color:var(--active)}.opt[aria-pressed=true] .opt-l{background:var(--active);border-color:var(--active);color:var(--on-active, oklch(.14 .01 var(--ah, 250)))}.opt[data-mark]{cursor:default}.opt[data-mark=right]{border-color:var(--ok)}.opt[data-mark=right] .opt-l{background:var(--ok);border-color:var(--ok);color:var(--on-mark)}.opt[data-mark=wrong]{border-color:var(--bad)}.opt[data-mark=wrong] 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0;max-width:44ch;font-size:13px;color:var(--t3);line-height:1.45}.qr-acts{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;padding:26px var(--card-pad, 22px) 34px}@media (max-width: 560px){.qresults .qr-body{padding-top:26px}.qr-dial{margin:20px 0 8px}.qr-acts{padding-bottom:28px}.qr-acts .q-btn{flex:1 1 auto}}.exam .quiz-count{margin-inline-start:0}.quiz-head>.quiz-leave:last-child{margin-inline-start:auto}.quiz-head .exam-clock+.quiz-leave{margin-inline-start:0}.quiz.exam{min-height:0}.exam .quiz-body{padding-block:22px 26px}.exam-foot .nav{flex:1 1 260px;padding:0;border-top:0;justify-content:center;gap:6px}@media (max-width: 720px){.exam-foot .nav{order:-1;flex-basis:100%;justify-content:flex-start}.exam-foot .q-flag{font-size:var(--fs-sm)}}.nav-inline{padding:0;border-top:0;margin:4px 0 18px}.nav-sq[data-mark=right]{background:var(--ok);border-color:var(--ok);color:var(--on-mark)}.nav-sq[data-mark=wrong]{background:none;border-color:var(--bad);border-style:dashed;color:var(--t1)}.q-rev-yours{color:var(--t3)}.q-rev-right{color:var(--t1);font-weight:500}.q-rev-q b{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--t3);font-weight:400;margin-inline-end:6px}.quiz.exam{min-height:min(100dvh - 96px,940px);--paper-ease: cubic-bezier(.32, .72, 0, 1);--glass: oklch(from var(--panel) l c h / .82);--hair: oklch(from var(--t1) l c h / .09);--lift: oklch(from var(--t1) l c h / .06);--d2: 0 24px 70px oklch(0 0 0 / .5), 0 3px 10px oklch(0 0 0 / .34);position:relative;grid-template-rows:auto 1fr auto;padding-bottom:0}.app[data-variant=day] .quiz.exam{--d2: 0 18px 50px oklch(.25 .02 255 / .2), 0 2px 8px oklch(.25 .02 255 / .12);--hair: oklch(from var(--t1) l c h / .13);--lift: oklch(1 0 0 / .9)}.exam .quiz-head,.exam 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.quiz-head{gap:10px}.q-weak{display:grid;gap:4px;margin:4px 0 22px}.q-weak-row{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;min-height:44px;padding:10px 12px;text-align:left;background:var(--panel);border:1px solid var(--edge);border-radius:10px;font:inherit;color:var(--t2);cursor:pointer}.q-weak-row:hover{border-color:var(--edge-hi);color:var(--t1)}.q-weak-row b{font-size:var(--fs-md);font-weight:500;color:var(--t1)}.q-weak-row em{font-style:normal;font-size:var(--fs-sm);color:var(--t3);margin-inline-start:auto}.q-rev[data-mark=right]{border-inline-start-color:var(--ok)}.q-rev[data-mark=wrong]{border-inline-start-color:var(--bad)}.q-got{margin-top:22px}.q-got>summary{min-height:44px;display:flex;align-items:center;font-size:var(--fs-md);color:var(--t2);cursor:pointer;list-style:none}.q-got>summary::-webkit-details-marker{display:none}.q-got>summary:before{content:"›";margin-inline-end:9px;color:var(--t3);transition:transform .2s var(--paper-ease);display:inline-block}.q-got[open]>summary:before{transform:rotate(90deg)}.q-got>summary:hover{color:var(--t1)}.q-got .q-review{margin-top:10px}#pw-sheet-end{--pw-sheet: end}