@layer components{.labs-page{flex-direction:column;gap:24px;display:flex}.labs-lead{color:var(--ink-2);margin-block-start:6px;font-size:16px;line-height:1.8}.labs-subject-title{margin-block-end:12px;font-size:18px;font-weight:700}.labs-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:16px;display:grid}.lab-card{border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);transition:transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease);flex-direction:column;gap:16px;padding:16px;display:flex}@media (hover:hover){.lab-card:hover{box-shadow:var(--shadow-lift);transform:translateY(-2px)}.lab-card:hover .lab-thumb-cell{animation:lab-thumb-wave .9s var(--ease) both;animation-delay:calc(var(--c,1) * 30ms)}}.lab-card:active{transform:scale(.99)}.lab-thumb{aspect-ratio:18/10.6;border-radius:var(--r-md);background:var(--canvas);grid-template-rows:repeat(7,1fr) .5fr repeat(2,1fr);grid-template-columns:repeat(18,minmax(0,1fr));gap:2px;padding:14px;display:grid}.lab-thumb-cell{background:var(--fill);border-radius:2px}@keyframes lab-thumb-wave{40%{transform:translateY(-2px)scale(1.2)}}.lab-card-text{flex-direction:column;gap:4px;display:flex}.lab-card-title{justify-content:space-between;align-items:center;font-size:18px;font-weight:700;display:flex}.lab-card-title svg{width:18px;height:18px;color:var(--ink-3)}.lab-card-summary{color:var(--ink-2);font-size:15px;line-height:1.8}.pt-lab{flex-direction:column;gap:16px;display:flex}.pt-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:12px 24px;display:flex}.pt-kicker{color:var(--violet);margin-block-end:2px;font-size:14px;font-weight:600}.pt-lead{max-width:560px;color:var(--ink-2);margin-block-start:6px;font-size:15px;line-height:1.8}.pt-play{border-radius:var(--r-md);background:var(--violet-soft);min-height:56px;color:var(--violet);text-align:start;transition:transform var(--dur-1) var(--ease);align-items:center;gap:12px;padding:8px 18px 8px 14px;font-size:15px;font-weight:700;display:inline-flex}.pt-play span{flex-direction:column;display:flex}.pt-play small{color:var(--ink-2);font-size:13px;font-weight:500}.pt-play svg{width:26px;height:26px;transition:transform var(--dur-3) var(--ease)}@media (hover:hover){.pt-play:hover svg{transform:rotate(-12deg)scale(1.12)}}.pt-play:active{transform:scale(.97)}.pt-controls{flex-direction:column;gap:10px;display:flex}.pt-books{flex-wrap:wrap;gap:6px;display:flex}@media (max-width:639px){.pt-controls .pt-books{margin-inline:calc(-1 * var(--gutter));padding-inline:var(--gutter);scrollbar-width:none;flex-wrap:nowrap;overflow-x:auto}.pt-controls .pt-books .chip{flex:none}.pt-lead{font-size:14px}.pt-play{min-height:44px;padding-block:6px}.pt-play small{display:none}}.pt-chip-note{opacity:.7;margin-inline-start:4px;font-size:13px}.pt-tools{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.pt-views{background:var(--surface);max-width:100%;box-shadow:inset 0 0 0 1px var(--line);scrollbar-width:none;border-radius:999px;gap:2px;padding:3px;display:flex;overflow-x:auto}.pt-view{min-height:36px;color:var(--ink-2);white-space:nowrap;transition:background-color var(--dur-2) var(--ease), color var(--dur-2) var(--ease);border-radius:999px;flex:none;padding-inline:14px;font-size:14px;font-weight:500}.pt-view[aria-checked=true]{background:var(--ink);color:var(--surface)}.pt-search{background:var(--surface);max-width:320px;min-height:42px;box-shadow:inset 0 0 0 1px var(--line);color:var(--ink-3);border-radius:999px;flex:200px;align-items:center;gap:8px;padding-inline:14px;display:flex}.pt-search:focus-within{box-shadow:inset 0 0 0 2px var(--ink)}.pt-search svg{flex:none;width:18px;height:18px}.pt-search input{width:100%;min-width:0;color:var(--ink);background:0 0;border:0;outline:none;font-size:15px}.pt-board-wrap{border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);padding:10px}.pt-board{--gap:2px;--round:3px;gap:var(--gap);grid-template-rows:repeat(7,auto) 6px repeat(2,auto);grid-template-columns:repeat(18,minmax(0,1fr));display:grid;position:relative}@media (min-width:640px){.pt-board-wrap{padding:16px}.pt-board{--gap:3px;--round:6px;grid-template-rows:repeat(7,auto) 12px repeat(2,auto)}}@media (min-width:1000px){.pt-board{--gap:4px;--round:8px}}.pt-cell{aspect-ratio:1/1.12;border-radius:var(--round);background:var(--fill,var(--canvas));min-width:0;color:var(--fill-ink,var(--ink));cursor:pointer;transition:transform var(--dur-2) var(--ease), opacity var(--dur-3) var(--ease), filter var(--dur-3) var(--ease), background-color var(--dur-fill) var(--ease), color var(--dur-fill) var(--ease), box-shadow var(--dur-2) var(--ease);animation:pt-cell-in .48s var(--ease) both;animation-delay:calc(var(--i) * 14ms);-webkit-tap-highlight-color:transparent;flex-direction:column;justify-content:center;align-items:center;padding:0;line-height:1;display:flex;position:relative;overflow:hidden}@keyframes pt-cell-in{0%{opacity:0;transform:translateY(8px)scale(.6)}}.pt-z{opacity:.8;font-size:9px;font-weight:500;display:none}.pt-sym{font-size:clamp(8.5px,2.6vw,13px);font-weight:700}.pt-name,.pt-mass{display:none}@media (min-width:640px){.pt-cell{gap:2px}.pt-z{display:block}.pt-sym{font-size:clamp(12px,1.9vw,21px)}}@media (min-width:1000px){.pt-cell{justify-content:space-between;padding-block:5px 4px}.pt-z{align-self:flex-start;padding-inline:5px;font-size:10px}.pt-name{text-overflow:ellipsis;white-space:nowrap;max-width:100%;padding-inline:2px;font-size:10px;font-weight:500;display:block;overflow:hidden}.pt-mass{opacity:.7;font-size:8.5px;display:block}}.pt-dot{top:2px;background:var(--violet);border-radius:50%;width:3px;height:3px;position:absolute;inset-inline-end:2px}@media (min-width:640px){.pt-dot{top:9%;width:5px;height:5px;inset-inline-end:9%}}@media (min-width:1000px){.pt-dot{width:6px;height:6px}}.pt-board[data-view=trend] .pt-dot{display:none}@media (hover:hover){.pt-cell:hover{z-index:2;box-shadow:var(--shadow-lift);transform:translateY(-2px)scale(1.12)}}.pt-cell:active{transform:scale(.94)}.pt-cell:focus-visible{z-index:3;outline:2px solid var(--ink);outline-offset:1px}.pt-cell[data-picked]{z-index:3;box-shadow:0 0 0 2px var(--surface), 0 0 0 4px var(--ink);animation:pt-pop var(--dur-3) var(--ease)}@keyframes pt-pop{50%{transform:scale(1.18)}}.pt-board[data-dimming] .pt-cell:not([data-lit]){opacity:.2;filter:grayscale(.7)}.pt-board[data-view=books] .pt-cell[data-tone=heat]{--fill:color-mix(in srgb, var(--violet) calc(var(--heat) * 78%), var(--canvas));--fill-ink:var(--ink)}.pt-board[data-view=trend] .pt-cell[data-tone=heat]{--fill:color-mix(in srgb, var(--blue) calc(4% + var(--heat) * 92%), var(--canvas));--fill-ink:var(--ink)}.pt-board .pt-cell[data-hot]{--fill-ink:var(--surface)}.pt-board[data-game] .pt-cell{cursor:crosshair}.pt-cell[data-result=right]{z-index:4;background:var(--green);color:var(--surface);animation:pt-right .6s var(--ease);box-shadow:0 0 0 4px #29cc574d}.pt-cell[data-result=wrong]{z-index:4;background:var(--red);color:var(--surface);animation:pt-wrong .42s var(--ease)}.pt-cell[data-result=answer]{z-index:4;background:var(--green-soft);color:var(--green-ink);box-shadow:0 0 0 2px var(--green);animation:pt-beacon 1.2s var(--ease) infinite}@keyframes pt-right{30%{transform:scale(1.35)}60%{transform:scale(.95)}}@keyframes pt-wrong{20%,60%{transform:translate(-3px)}40%,80%{transform:translate(3px)}}@keyframes pt-beacon{50%{box-shadow:0 0 0 2px var(--green), 0 0 0 8px #29cc572e}}.pt-frow-label{color:var(--ink-3);text-align:start;white-space:nowrap;grid-column:1/span 2;align-self:center;padding-inline-end:4px;font-size:clamp(7px,1.5vw,12px);font-weight:500}.pt-focus{min-width:0;animation:pt-focus-in var(--dur-3) var(--ease);pointer-events:none;grid-area:1/3/span 3/span 10;align-self:center;align-items:center;gap:clamp(8px,2vw,20px);padding-inline:clamp(4px,1.5vw,20px);display:flex}@keyframes pt-focus-in{0%{opacity:0;transform:translateY(4px)}}.pt-focus-text{flex-direction:column;gap:2px;min-width:0;display:flex}.pt-focus-text strong{font-size:clamp(12px,2.4vw,22px);font-weight:700;line-height:1.4}.pt-focus-en{color:var(--ink-3);margin-inline-start:8px;font-size:.6em;font-weight:500}.pt-focus-meta{color:var(--ink-2);font-size:clamp(9px,1.6vw,14px)}.pt-focus-glance,.pt-focus-count{display:none}@media (min-width:640px){.pt-focus-count{color:var(--violet);font-size:13px;font-weight:600;display:block}}@media (min-width:1000px){.pt-focus-glance{color:var(--ink-2);text-overflow:ellipsis;white-space:nowrap;font-size:14px;line-height:1.7;display:block;overflow:hidden}}.pt-focus-empty{flex-direction:column;justify-content:center;align-items:flex-start;gap:2px}.pt-focus-empty strong{font-size:clamp(11px,2vw,18px)}.pt-focus-empty span{color:var(--ink-3);font-size:clamp(9px,1.5vw,14px)}.pt-tile{aspect-ratio:1/1.1;background:var(--fill);color:var(--fill-ink);border-radius:10px;flex:none;grid-template-rows:auto 1fr auto;place-items:center;padding:4px;line-height:1;display:grid}.pt-tile-medium{width:clamp(34px,8vw,84px)}.pt-tile-large{border-radius:var(--r-md);width:clamp(72px,18vw,104px);animation:pt-pop var(--dur-3) var(--ease)}.pt-tile-z{justify-self:start;font-size:clamp(8px,1.2vw,13px);font-weight:600}.pt-tile-symbol{font-size:clamp(14px,3.6vw,40px);font-weight:800}.pt-tile-large .pt-tile-symbol{font-size:clamp(28px,7vw,44px)}.pt-tile-mass{opacity:.8;font-size:clamp(7px,1vw,12px)}.pt-legend{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.pt-key{min-height:34px;color:var(--ink-2);transition:background-color var(--dur-2) var(--ease);border-radius:999px;align-items:center;gap:6px;padding-inline:10px 12px;font-size:14px;display:inline-flex}@media (hover:hover){.pt-key:hover{background:var(--canvas-deep)}}.pt-key-on{background:var(--ink);color:var(--surface)}.pt-swatch{background:var(--fill);border-radius:4px;width:14px;height:14px;box-shadow:inset 0 0 0 1px #14141414}.pt-legend-trend{flex-direction:column;align-items:stretch;gap:10px}.pt-rule{color:var(--ink);font-size:15px;line-height:1.9}.pt-rule-source,.pt-clue-source{color:var(--violet);align-items:center;gap:2px;font-weight:600;display:inline-flex}.pt-rule-source svg,.pt-clue-source svg{width:16px;height:16px}.pt-arrows{color:var(--blue-ink);flex-wrap:wrap;gap:8px 20px;font-size:14px;font-weight:600;display:flex}.pt-arrow-down:before{content:"↓";margin-inline-end:6px}.pt-arrow-across:before{content:"→";margin-inline-end:6px}.pt-legend-note{color:var(--ink-3);font-size:13px;line-height:1.8}.pt-heat-scale{background:linear-gradient(to left, var(--violet), var(--canvas));border-radius:999px;width:120px;height:10px}.pt-pick-one{border-radius:var(--r-lg);background:var(--canvas-deep);color:var(--ink-2);text-align:center;padding:24px;font-size:15px}.pt-detail{border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);animation:lesson-in var(--dur-3) var(--ease);padding:18px}@media (min-width:768px){.pt-detail{padding:28px}}.pt-detail-head{align-items:center;gap:16px;display:flex}.pt-detail-title{flex-direction:column;flex:1;align-items:flex-start;gap:6px;min-width:0;display:flex}.pt-detail-title h2{font-size:clamp(22px,4vw,30px);font-weight:800;line-height:1.3}.pt-detail-en{color:var(--ink-3);font-size:.55em;font-weight:500}.pt-family-chip{background:var(--fill);min-height:30px;color:var(--fill-ink);border-radius:999px;padding-inline:12px;font-size:13px;font-weight:600}.pt-glance{color:var(--ink-2);font-size:15px;line-height:1.8}.pt-detail-nav{align-self:flex-start;gap:2px;display:flex}@media (max-width:639px){.pt-detail-head{flex-wrap:wrap;align-items:flex-start;gap:12px 14px}.pt-detail-nav{order:-1;justify-content:flex-end;width:100%;margin-block:-8px -4px}}.pt-detail-body{grid-template-areas:"photo""facts""card";gap:24px;margin-block-start:20px;display:grid}.pt-detail-photo{grid-area:photo}.pt-facts{grid-area:facts}.pt-card{grid-area:card}@media (min-width:900px){.pt-detail-body{grid-template-columns:minmax(0,1fr) 300px;grid-template-areas:"facts card";align-items:start}.pt-detail-body:has(.pt-detail-photo){grid-template-rows:auto 1fr;grid-template-areas:"facts photo""facts card";row-gap:16px}}.pt-photo{flex-direction:column;gap:6px;margin:0;display:flex}.pt-photo img{border-radius:var(--r-md);background:var(--canvas-deep);object-fit:cover;width:100%;height:auto;max-height:240px;animation:pt-photo-in .5s var(--ease) both}@media (min-width:900px){.pt-photo img{max-height:320px}}@keyframes pt-photo-in{0%{opacity:0;transform:scale(.97)}}.pt-photo figcaption{color:var(--ink-3);font-size:12px;line-height:1.7}.pt-photo a{color:inherit;text-underline-offset:3px;-webkit-text-decoration:underline dotted;text-decoration:underline dotted}.pt-focus-photo{display:none}@media (min-width:1000px){.pt-focus-photo{width:118px;height:118px;box-shadow:var(--shadow-card);object-fit:cover;animation:pt-photo-in var(--dur-3) var(--ease) both;border-radius:16px;flex:none;margin-inline-start:auto;display:block}}.pt-facts-title{color:var(--ink-3);margin-block-end:8px;font-size:14px;font-weight:600}.pt-empty{color:var(--ink-2);font-size:15px;line-height:1.8}.pt-fact-group+.pt-fact-group{margin-block-start:18px}.pt-fact-book{align-items:baseline;gap:8px;margin-block-end:6px;font-size:16px;font-weight:700;display:flex}.pt-fact-book span{color:var(--ink-3);font-size:13px;font-weight:500}.pt-fact-list{flex-direction:column;display:flex}.pt-fact{border-block-end:1px solid var(--line);animation:pt-fact-in var(--dur-3) var(--ease) both;animation-delay:calc(var(--i) * 40ms);padding-block:10px}.pt-fact:last-child{border-block-end:0}@keyframes pt-fact-in{0%{opacity:0;transform:translate(-8px)}}.pt-fact-line{align-items:flex-start;gap:10px;display:flex}.pt-fact-bullet{background:var(--violet);opacity:.45;border-radius:50%;flex:none;width:7px;height:7px;margin-block-start:11px}.pt-fact-star{width:16px;height:16px;color:var(--amber-edge);fill:var(--amber);flex:none;margin-block-start:6px;margin-inline:-4px -1px}.pt-fact-text{flex:1;min-width:0;font-size:16px;line-height:1.9}.pt-fact[data-star] .pt-fact-text{font-weight:600}.pt-fact-tag{background:var(--violet-soft);color:var(--violet);vertical-align:2px;border-radius:999px;margin-inline-end:8px;padding:0 8px;font-size:12px;font-weight:600;line-height:22px;display:inline-block}.pt-fact-page{min-height:32px;color:var(--violet);white-space:nowrap;border-radius:999px;flex:none;align-items:center;gap:2px;padding-inline:8px 6px;font-size:13px;font-weight:600;display:inline-flex}@media (hover:hover){.pt-fact-page:hover{background:var(--violet-soft)}}.pt-fact-page svg{width:15px;height:15px;transition:transform var(--dur-2) var(--ease)}.pt-fact-page[aria-expanded=true] svg,.pt-family-toggle[aria-expanded=true] svg{transform:rotate(180deg)}@media (max-width:639px){.pt-fact-line{flex-wrap:wrap;row-gap:0}.pt-fact-text{flex-basis:calc(100% - 26px)}.pt-fact-page{min-height:30px;margin-inline-start:18px;padding-inline:0 6px}}.pt-fact-excerpt{animation:lesson-in var(--dur-3) var(--ease);margin-block:10px 4px}.pt-family-facts{border-block-start:1px dashed var(--line-strong);margin-block-start:18px;padding-block-start:12px}.pt-family-toggle{width:100%;min-height:40px;color:var(--ink);text-align:start;align-items:center;gap:8px;font-size:15px;font-weight:700;display:flex}.pt-family-toggle span{color:var(--ink-3);font-size:13px;font-weight:500}.pt-family-toggle svg{width:18px;height:18px;transition:transform var(--dur-2) var(--ease);margin-inline-start:auto}.pt-card{border-radius:var(--r-md);background:var(--canvas);flex-direction:column;align-items:center;gap:16px;padding:16px;display:flex}.pt-atom{width:100%;max-width:210px;overflow:visible}.pt-ring{fill:none;stroke:var(--line-strong);stroke-width:1px}.pt-electron{fill:var(--fill-ink)}.pt-nucleus{fill:var(--fill);stroke:var(--fill-ink);stroke-width:1.5px}.pt-nucleus-text{fill:var(--fill-ink);font-size:12px;font-weight:700}.pt-orbit{transform-box:view-box;transform-origin:50%;animation:pt-spin var(--spin) linear infinite;animation-direction:var(--dir)}@keyframes pt-spin{to{transform:rotate(360deg)}}.pt-data{grid-template-columns:1fr 1fr;gap:12px 16px;width:100%;display:grid}.pt-data div{flex-direction:column;gap:2px;display:flex}.pt-data dt{color:var(--ink-3);font-size:13px}.pt-data dd{font-size:15px;font-weight:600}.pt-data-wide{grid-column:1/-1}.pt-config{unicode-bidi:isolate;flex-wrap:wrap;gap:2px 6px;font-size:16px;display:inline-flex}.pt-config-core{color:var(--ink-2)}.pt-config sup{font-size:.68em}.pt-game{border-radius:var(--r-lg);background:var(--surface);box-shadow:0 0 0 2px var(--violet-soft), var(--shadow-card);animation:lesson-in var(--dur-3) var(--ease);flex-direction:column;gap:10px;padding:14px 16px;display:flex}.pt-game[data-picked=right]{box-shadow:0 0 0 2px var(--green), var(--shadow-card)}.pt-game[data-picked=wrong]{box-shadow:0 0 0 2px var(--red), var(--shadow-card)}.pt-game-top{align-items:center;gap:12px;display:flex}.pt-game-title{color:var(--violet);font-size:14px;font-weight:700}.pt-game-dots{flex:1;gap:5px;display:flex}.pt-game-dots li{background:var(--line-strong);width:8px;height:8px;transition:background-color var(--dur-2) var(--ease);border-radius:50%}.pt-game-dots li[data-state=now]{background:var(--ink);transform:scale(1.25)}.pt-game-dots li[data-state=right]{background:var(--green)}.pt-game-dots li[data-state=wrong]{background:var(--red)}.pt-clue{animation:lesson-in var(--dur-3) var(--ease);font-size:clamp(17px,2.6vw,21px);font-weight:600;line-height:1.9}.pt-clue-fact{border-radius:var(--r-sm);background:var(--canvas);color:var(--ink-2);animation:lesson-in var(--dur-3) var(--ease);padding:8px 12px;font-size:15px;line-height:1.9}.pt-game-foot{flex-wrap:wrap;align-items:center;gap:8px 14px;display:flex}.pt-game-ask{color:var(--ink-3);font-size:14px}.pt-hint-text{color:var(--amber-ink);font-size:14px;font-weight:600}.pt-verdict{font-size:15px;font-weight:700}.pt-game[data-picked=right] .pt-verdict{color:var(--green-ink)}.pt-game[data-picked=wrong] .pt-verdict{color:var(--red-ink)}.pt-clue-source{font-size:14px}.pt-next{margin-inline-start:auto}.pt-score{align-items:center;gap:16px;display:flex}.pt-score-ring{--size:72px;width:var(--size);height:var(--size);background:conic-gradient(var(--green) calc(var(--shown) * 360deg), var(--canvas-deep) 0);animation:pt-fill .9s var(--ease) forwards;border-radius:50%;flex:none;-webkit-mask:radial-gradient(circle,#0000 54%,#000 56%);mask:radial-gradient(circle,#0000 54%,#000 56%)}@property --shown{syntax:"<number>";inherits:false;initial-value:0}@keyframes pt-fill{to{--shown:var(--share)}}.pt-score-text{flex-direction:column;gap:2px;font-size:15px;display:flex}.pt-score-text strong{font-size:24px}.pt-score-best{color:var(--ink-3);font-size:13px}@media (max-width:639px){.pt-lab[data-playing] .pt-lead,.pt-lab[data-playing] .pt-kicker,.pt-focus-empty span{display:none}.pt-game{gap:8px;padding:12px}.pt-clue{font-size:16px}.pt-clue-fact{padding:6px 10px;font-size:14px}}@media (prefers-reduced-motion:reduce){.pt-cell,.pt-orbit,.pt-fact,.pt-focus,.pt-photo img,.pt-focus-photo,.pt-cell[data-result],.lab-card .lab-thumb-cell{animation:none!important}.pt-score-ring{--shown:var(--share);animation:none}}.lab-tool{flex-direction:column;gap:16px;display:flex}.pt-view[aria-selected=true]{background:var(--ink);color:var(--surface)}.lab-art{aspect-ratio:18/10.6;border-radius:var(--r-md);background:var(--canvas);padding:10px;display:block}.lab-art svg{width:100%;height:100%;overflow:visible}.lab-art text{font-family:var(--font-body);text-anchor:middle;dominant-baseline:central}.lab-art [data-tone=amber]{--art-fill:var(--amber-soft);--art-ink:var(--amber-ink)}.lab-art [data-tone=violet]{--art-fill:var(--violet-soft);--art-ink:var(--violet)}.lab-art [data-tone=blue]{--art-fill:var(--blue-soft);--art-ink:var(--blue-ink)}.lab-art-track{fill:none;stroke:var(--line-strong);stroke-width:2px;stroke-dasharray:4 4}.lab-art-stop{fill:var(--art-fill);stroke:var(--art-ink);stroke-width:1.5px}.lab-art-stop-label{fill:var(--art-ink);font-size:13px;font-weight:800}.lab-art-caption{fill:var(--ink-3);font-size:9px;font-weight:600}.lab-art-factor{fill:var(--violet);font-size:9px;font-weight:700}.lab-art-step{transform-box:fill-box;transform-origin:50%;animation:lab-art-pulse 2.4s var(--ease) infinite;animation-delay:calc(var(--i) * .8s)}@keyframes lab-art-pulse{0%,30%,to{transform:scale(1)}12%{transform:scale(1.12)}}.lab-art-stand,.lab-art-bar,.lab-art-string{fill:none;stroke:var(--ink-3);stroke-width:2px;stroke-linecap:round;stroke-linejoin:round}.lab-art-stand{fill:var(--line)}.lab-art-string{stroke-width:1px}.lab-art-pivot{fill:var(--violet)}.lab-art-pan{fill:var(--surface);stroke:var(--ink-3);stroke-width:1.5px}.lab-art-beam{transform-origin:90px 30px;animation:3s ease-in-out infinite lab-art-rock}@keyframes lab-art-rock{0%,to{transform:rotate(-4deg)}50%{transform:rotate(4deg)}}.lab-art-atom{stroke-width:1px}.lab-art-atom-H{fill:var(--el-nonmetal);stroke:var(--el-nonmetal-ink)}.lab-art-atom-O{fill:var(--el-alkali);stroke:var(--el-alkali-ink)}.lab-art-bond{fill:none;stroke:var(--ink-2);stroke-width:2.2px;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:1;stroke-dashoffset:0}.lab-art-double{stroke:var(--violet)}.lab-art-card rect{fill:var(--surface);stroke:var(--line-strong);stroke-width:1.5px}.lab-art-card text{fill:var(--ink);text-anchor:middle;font-family:Times New Roman,serif;font-size:15px;font-style:italic}.lab-art-words text{font-family:var(--font-reading);font-size:14px;font-style:normal;font-weight:700}.lab-art-card-ask rect{fill:var(--violet-soft);stroke:var(--violet);stroke-dasharray:4 3}.lab-art-card-ask text{fill:var(--violet);font-weight:700}@media (hover:hover){.lab-card:hover .lab-art-card{animation:lab-thumb-wave .9s var(--ease) both;animation-delay:calc(var(--i) * 80ms)}}.lab-art-wire{fill:none;stroke:var(--ink);stroke-width:2.6px;stroke-linecap:round;stroke-linejoin:round}.lab-art-thick{stroke-width:5px;stroke-linecap:butt}.lab-art-patch{fill:var(--canvas)}.lab-art-lamp{fill:#ffd84d;stroke:var(--ink);stroke-width:2.6px}.lab-art-flow{fill:none;stroke:var(--violet);stroke-width:4.5px;stroke-linecap:round;stroke-dasharray:.1 15.9;opacity:.7}@media (hover:hover){.lab-card:hover .lab-art-flow{animation:.7s linear infinite lab-art-flow}}@keyframes lab-art-flow{to{stroke-dashoffset:-16px}}.lab-art-axis,.lab-art-road{fill:none;stroke:var(--line-strong);stroke-width:2px;stroke-linecap:round}.lab-art-curve{fill:none;stroke:var(--blue);stroke-width:3.5px;stroke-linecap:round}.lab-art-tangent{stroke:var(--violet);stroke-width:2px;stroke-dasharray:5 4}.lab-art-dot{fill:var(--violet)}.lab-art-car{fill:var(--hl);stroke:var(--ink);stroke-width:1.5px}@media (hover:hover){.lab-card:hover .lab-art-curve{animation:lab-art-draw .9s var(--ease) both}.lab-card:hover .lab-art-car{animation:lab-art-drive .9s var(--ease) both}}@keyframes lab-art-draw{0%{stroke-dashoffset:1px}}@keyframes lab-art-drive{0%{transform:translate(-50px)}}.lab-art-oh{fill:var(--el-alkali-ink);font-size:12px;font-weight:800}@media (hover:hover){.lab-card:hover .lab-art-bond{animation:lab-art-draw .9s var(--ease) both}}.lab-card-box{border-radius:var(--r-lg);background:var(--surface);min-width:0;box-shadow:var(--shadow-card);flex-direction:column;gap:12px;padding:16px;display:flex}.lab-box-title{flex-wrap:wrap;align-items:baseline;gap:4px 10px;font-size:16px;font-weight:700;display:flex}.lab-box-note{color:var(--ink-3);font-size:13px;font-weight:500}.lab-input,.lab-select{border-radius:var(--r-md);background:var(--canvas);width:100%;min-width:0;min-height:44px;box-shadow:inset 0 0 0 1px var(--line);padding-inline:12px;font-size:16px}.lab-input:focus-visible,.lab-select:focus-visible{outline:2px solid var(--violet);outline-offset:1px}.lab-input[dir=ltr]{text-align:left}.lab-keys{flex-wrap:wrap;gap:6px;display:flex}.lab-key{border-radius:var(--r-sm);background:var(--canvas);min-width:44px;min-height:36px;box-shadow:inset 0 0 0 1px var(--line);padding-inline:10px;font-size:15px}.lab-key:active{transform:scale(.95)}.lab-error{color:var(--red-ink);font-size:14px;line-height:1.8}.lab-inline-link{color:var(--violet);text-underline-offset:3px;font-size:14px;font-weight:600;text-decoration:underline}.lab-place{color:var(--violet);white-space:nowrap;flex:none;font-size:13px}.lab-suggest summary{color:var(--ink-2);cursor:pointer;font-size:14px}.lab-suggest-list{flex-wrap:wrap;gap:6px;margin-block-start:10px;display:flex}.lab-suggest-reaction{direction:ltr;max-width:100%;overflow-x:auto}.lab-from{border-radius:var(--r-lg);background:var(--hl-lab-soft);box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--violet) 30%, transparent);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;display:flex}.lab-from-text{flex-direction:column;flex:260px;gap:2px;display:flex}.lab-from-label{color:var(--violet);font-size:13px;font-weight:700}.lab-from-text p{font-size:15px;line-height:1.8}.chem{white-space:nowrap;unicode-bidi:isolate;display:inline}.chem sub,.chem sup{font-size:.72em;line-height:0}.chem-phase{color:var(--ink-3);margin-inline-start:1px;font-size:.78em}.num{white-space:nowrap;unicode-bidi:isolate}.chem-equation{flex-wrap:wrap;align-items:baseline;gap:2px 5px;display:inline-flex}.chem-arrow{flex-direction:column;align-items:center;margin-inline:2px;line-height:1;display:inline-flex}.chem-arrow small{color:var(--ink-3);font-size:.62em}.chem-plus{color:var(--ink-3)}.st-layout{align-items:start;gap:16px;display:grid}@media (min-width:1000px){.st-layout{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr)}.st-road-box{position:sticky;top:88px}}.st-column{flex-direction:column;gap:16px;min-width:0;display:flex}.st-formula-input{letter-spacing:.02em;min-height:54px;font-size:20px}.lab-key-clear{color:var(--ink-3);margin-inline-start:auto;font-size:13px}.lab-count{background:var(--hl-lab-soft);min-width:1.9em;color:var(--violet);border-radius:999px;place-items:center;padding:1px 6px;font-size:.82em;font-weight:800;display:inline-grid}[aria-selected=true]>.lab-count{background:color-mix(in srgb, var(--surface) 22%, transparent);color:inherit}.st-source{color:var(--ink-3);align-items:baseline;gap:6px;font-size:13px;display:flex}.st-book-list{border-block-start:1px dashed var(--line);flex-direction:column;gap:8px;padding-block-start:10px;display:flex}.st-book-list>*{flex-shrink:0}.st-book-title{color:var(--ink-2);font-size:13px;font-weight:700}.st-book-list .pt-books{scrollbar-width:none;flex-wrap:nowrap;margin-inline:0;padding-inline:0;overflow-x:auto}.st-book-scroll{overscroll-behavior:contain;scrollbar-width:thin;flex-direction:column;gap:10px;max-height:340px;padding-inline-end:4px;display:flex;overflow-y:auto}.st-book-scroll>*{flex-shrink:0}@media (min-width:1000px){.st-book-scroll{max-height:420px}}.st-list-search{flex:none;max-width:none}.st-list-search input{text-align:left}.lab-list-book .st-list-formulas{flex-flow:wrap;gap:6px}.st-list-formula{align-items:baseline;gap:6px;display:inline-flex}.st-list-formula small{color:var(--ink-3);font-size:11px}.st-example{background:var(--canvas);min-height:34px;box-shadow:inset 0 0 0 1px var(--line);transition:background-color var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);border-radius:999px;padding:4px 10px;font-size:14px}@media (hover:hover){.st-example:hover{background:var(--hl-lab-soft)}}.st-example:active{transform:scale(.96)}.st-picking{grid-template-columns:1fr 1fr;gap:6px;display:grid}.st-picking button{border-radius:var(--r-md);background:var(--canvas);min-height:40px;color:var(--ink-2);box-shadow:inset 0 0 0 1px var(--line);font-size:14px;font-weight:600}.st-picking button[aria-checked=true][data-role=start]{background:var(--green-soft);color:var(--green-ink);box-shadow:inset 0 0 0 2px var(--green)}.st-picking button[aria-checked=true][data-role=goal]{background:var(--violet-soft);color:var(--violet);box-shadow:inset 0 0 0 2px var(--violet)}.st-species{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px 4px;display:flex}.st-slot{align-items:center;gap:4px;display:flex}.st-sp{border-radius:var(--r-md);background:var(--canvas);min-width:76px;box-shadow:inset 0 0 0 1px var(--line);transition:transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease), background-color var(--dur-2) var(--ease);flex-direction:column;align-items:center;gap:2px;padding:6px 10px 8px;display:flex}.st-sp:not(:disabled):active{transform:scale(.96)}.st-sp[data-role=start],.st-sp[data-role=both]{background:var(--green-soft);box-shadow:inset 0 0 0 2px var(--green)}.st-sp[data-role=goal]{background:var(--violet-soft);box-shadow:inset 0 0 0 2px var(--violet)}.st-sp-role{min-height:16px;font-size:11px;font-weight:700}.st-sp[data-role=start] .st-sp-role,.st-sp[data-role=both] .st-sp-role{color:var(--green-ink)}.st-sp[data-role=goal] .st-sp-role{color:var(--violet)}.st-sp-formula{align-items:baseline;gap:3px;font-size:19px;font-weight:600;display:flex}.st-coef{color:var(--violet)}.st-sp-mass{color:var(--ink-3);font-size:12px}.st-arrow,.st-plus{color:var(--ink-3);margin-inline:2px;font-size:18px}.st-note{color:var(--ink-2);text-align:center;font-size:13px}.st-atomic{border-block-start:1px dashed var(--line);flex-wrap:wrap;align-items:center;gap:6px 12px;padding-block-start:10px;font-size:13px;display:flex}.st-atomic-label{color:var(--ink-2);align-items:baseline;gap:6px;font-weight:600;display:flex}.st-atomic-label small{color:var(--ink-3);font-weight:500}.st-atomic-list{color:var(--ink-2);flex-wrap:wrap;gap:4px 10px;display:flex}.st-atomic-list b{color:var(--ink)}.st-atomic .st-table{flex-basis:100%}.st-pencil{vertical-align:-2px;width:14px;height:14px}.st-mass-rows{border-radius:var(--r-md);background:var(--canvas);flex-direction:column;gap:2px;padding:10px 12px;font-size:14px;display:flex}.st-mass-rows li{grid-template-columns:2.5em 1fr auto;gap:8px;display:grid}.st-mass-symbol{font-weight:700}.st-mass-sum{border-block-start:1px solid var(--line);margin-block-start:4px;padding-block-start:4px;font-weight:700}.st-table{grid-template-columns:repeat(auto-fill,minmax(92px,1fr));gap:6px;display:grid}.st-table-cell{border-radius:var(--r-sm);background:var(--canvas);align-items:center;gap:6px;padding:4px 4px 4px 10px;font-weight:700;display:flex}.st-table-cell input{background:var(--surface);text-align:center;border-radius:6px;width:100%;min-width:0;min-height:34px;padding-inline:6px;font-weight:500}.st-table-changed{box-shadow:inset 0 0 0 2px var(--violet)}.st-road{flex-direction:column;gap:0;display:flex;position:relative}.st-stop{border-radius:var(--r-lg);background:var(--canvas);flex-direction:column;gap:10px;padding:14px;display:flex;position:relative}.st-stop-start{background:var(--green-soft);box-shadow:inset 0 0 0 2px color-mix(in srgb, var(--green) 55%, transparent)}.st-stop-goal{background:var(--violet-soft);box-shadow:inset 0 0 0 2px color-mix(in srgb, var(--violet) 45%, transparent)}.st-stop-done{animation:st-arrive .52s var(--ease)}@keyframes st-arrive{40%{transform:scale(1.03)}}.st-stop-tag{background:var(--surface);border-radius:999px;align-self:flex-start;padding:2px 10px;font-size:12px;font-weight:700}.st-stop-start .st-stop-tag{color:var(--green-ink)}.st-stop-goal .st-stop-tag{color:var(--violet)}.st-stop-amount{flex-wrap:wrap;justify-content:center;align-items:baseline;gap:6px;font-size:22px;font-weight:700;display:flex;position:relative}.st-stop-input{border-radius:var(--r-md);background:var(--surface);width:7ch;min-height:46px;box-shadow:inset 0 0 0 1px var(--line);text-align:center;padding-inline:8px;font-size:22px;font-weight:700}.st-stop-input:focus-visible{outline:2px solid var(--green)}.st-stop-unit{color:var(--ink-2);font-size:16px;font-weight:600}.st-stop-question{color:var(--violet);font-size:28px}.st-stop-middle{align-items:center;margin-block:0;padding:8px 12px;font-size:17px;font-weight:600}.st-stop-hidden{color:var(--ink-3);letter-spacing:.2em}.st-units{flex-wrap:wrap;justify-content:center;gap:4px;display:flex}.st-units button{background:var(--surface);min-height:34px;color:var(--ink-2);box-shadow:inset 0 0 0 1px var(--line);border-radius:999px;padding-inline:12px;font-size:13px;font-weight:600}.st-units button[aria-checked=true]{background:var(--ink);color:var(--surface);box-shadow:none}.st-extras{flex-wrap:wrap;justify-content:center;gap:6px;display:flex}.st-extras:empty{display:none}.st-extra{background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);border-radius:999px;align-items:center;gap:6px;padding:4px 6px 4px 10px;font-size:13px;display:inline-flex}.st-extra input{background:var(--canvas);text-align:center;border-radius:999px;width:5.5ch;min-height:28px;font-weight:700}.st-optional{min-height:32px;color:var(--ink-2);border:1px dashed var(--line-strong);border-radius:999px;padding-inline:12px;font-size:13px}.st-optional-remove{width:24px;height:24px;color:var(--ink-3);border-radius:50%}.st-atoms-of{flex-wrap:wrap;justify-content:center;gap:4px;display:flex}.st-atoms-of button{background:var(--surface);min-height:30px;color:var(--ink-2);box-shadow:inset 0 0 0 1px var(--line);border-radius:999px;padding-inline:10px;font-size:12px}.st-atoms-of button[aria-checked=true]{color:var(--violet);box-shadow:inset 0 0 0 2px var(--violet)}.st-leg{flex-direction:column;align-items:center;gap:8px;padding-block:10px;display:flex;position:relative}.st-leg:before{border-inline-start:2px dashed var(--line-strong);content:"";width:0;position:absolute;inset-block:0;inset-inline-start:50%}.st-leg[data-open]:before{border-inline-start-style:solid;border-color:var(--violet)}.st-hop{border-radius:var(--r-md);background:var(--surface);box-shadow:var(--shadow-card);flex-wrap:wrap;justify-content:center;align-items:center;gap:4px 8px;padding:6px 12px;font-size:15px;display:inline-flex;position:relative}.st-leg[data-open] .st-hop{animation:st-step-in .32s var(--ease) both}@keyframes st-step-in{0%{opacity:0;transform:translateY(6px)}}.st-hop-hidden{color:var(--ink-3);font-size:13px}.st-hop-wait{color:var(--ink-2);text-align:center;font-size:14px}.st-hop-times{color:var(--violet);font-size:18px;font-weight:800}.st-hop-why{background:var(--hl-lab-soft);color:var(--violet);border-radius:999px;padding:2px 8px;font-size:12px;font-weight:600}.st-how{width:min(100%,320px);font-size:13px;position:relative}.st-how summary{color:var(--violet);text-align:center;cursor:pointer}.st-how .st-mass-rows{background:var(--surface);box-shadow:var(--shadow-card);margin-block-start:6px}.st-frac{flex-direction:column;align-items:center;padding-inline:6px;display:inline-flex}.st-frac>:first-child{border-block-end:1.5px solid;padding-block-end:2px}.st-frac>:last-child{padding-block-start:2px}.st-amount{white-space:nowrap}.st-unit,.st-of-word{color:var(--ink-2);font-size:.85em;font-weight:500}.st-guess{flex-direction:column;gap:6px;margin-block-start:4px;display:flex}.st-guess-label{color:var(--ink-2);font-size:14px;font-weight:600}.st-row{gap:8px;display:flex}.st-number{flex:1 1 0;min-width:5.5rem}.st-steps{flex-wrap:wrap;gap:8px;display:flex}.st-verdict{flex-wrap:wrap;align-items:center;gap:6px;font-size:14px;font-weight:600;line-height:1.8;display:flex}.st-verdict-right{color:var(--green-ink)}.st-verdict-wrong{color:var(--red-ink)}.st-paper{border-radius:var(--r-md);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);animation:st-step-in .32s var(--ease) both;flex-wrap:wrap;align-items:center;gap:8px;padding:14px;font-size:15px;display:flex}.st-paper-factor{align-items:center;gap:6px;display:inline-flex}.lab-cheer{pointer-events:none;position:absolute;inset-block-start:50%;inset-inline-start:50%}.lab-cheer span{background:var(--green);width:8px;height:8px;animation:lab-cheer .9s var(--ease) forwards;border-radius:2px;position:absolute}.lab-cheer span:nth-child(3n+1){background:var(--violet)}.lab-cheer span:nth-child(3n+2){background:var(--amber)}@keyframes lab-cheer{0%{opacity:1;transform:rotate(var(--a)) translateY(0) scale(1)}to{opacity:0;transform:rotate(var(--a)) translateY(calc(-1 * var(--d))) scale(.4)}}.bl-levels{flex-wrap:wrap;align-items:center;gap:8px 16px;display:flex}.bl-progress{color:var(--ink-2);align-items:center;gap:8px;font-size:13px;font-weight:600;display:inline-flex}.bl-progress-bar{background:var(--line);border-radius:999px;width:96px;height:8px;overflow:hidden}.bl-progress-bar span{border-radius:inherit;background:var(--green);height:100%;transition:width var(--dur-3) var(--ease);display:block}.bl-board{transition:box-shadow var(--dur-3) var(--ease);align-items:stretch;gap:16px;padding:20px 16px;position:relative}.bl-done{box-shadow:var(--shadow-card), inset 0 0 0 2px var(--green)}.bl-equation{--fit:1;font-size:calc(20px * var(--fit));justify-content:center;display:flex;overflow:hidden}.bl-equation[data-scroll]{scrollbar-width:thin;justify-content:flex-start;overflow-x:auto}@media (min-width:640px){.bl-equation{font-size:calc(24px * var(--fit))}}.bl-equation-line{white-space:nowrap;flex:none;align-items:center;gap:.25em;padding-block:2px;display:inline-flex}.bl-slot{flex:none;align-items:center;gap:.25em;display:flex}.bl-term{grid-template-columns:auto auto;align-items:center;column-gap:.18em;display:grid}.bl-step{background:var(--canvas);width:1.55em;height:1.2em;color:var(--violet);box-shadow:inset 0 0 0 1px var(--line);transition:transform var(--dur-1) var(--ease);border-radius:.35em;font-size:1em;font-weight:800;line-height:1}.bl-step:not(:disabled):active{transform:scale(.9)}.bl-step:disabled{opacity:.35}.bl-term .bl-step:first-child{border-end-end-radius:0;border-end-start-radius:0;grid-area:1/1}.bl-term .bl-coef{grid-area:2/1}.bl-term .bl-step:nth-of-type(2){border-start-start-radius:0;border-start-end-radius:0;grid-area:3/1}.bl-coef{background:var(--surface);width:1.55em;height:1.45em;color:var(--violet);box-shadow:inset 0 0 0 1px var(--line);place-items:center;font-size:1em;font-weight:800;display:grid}.bl-coef-one{color:var(--ink-3);font-weight:600}.bl-formula{grid-area:1/2/4;font-size:1em;font-weight:600}.bl-plus,.bl-arrow{color:var(--ink-3);font-size:.9em}.bl-arrow{margin-inline:.15em}.bl-scale{width:100%;max-width:460px;margin-inline:auto;overflow:visible}.bl-stand{fill:none;stroke:var(--ink-3);stroke-width:3px;stroke-linecap:round}.bl-beam{stroke:var(--ink-2);stroke-width:4px;stroke-linecap:round;transform-box:view-box;transition:transform .6s cubic-bezier(.34, 1.4, .5, 1), stroke var(--dur-3) var(--ease)}.bl-scale[data-balanced] .bl-beam{stroke:var(--green)}.bl-pivot{fill:var(--violet)}.bl-pan{transition:transform .6s cubic-bezier(.34,1.4,.5,1)}.bl-pan-string{fill:none;stroke:var(--line-strong);stroke-width:1.2px}.bl-pan-dish{fill:var(--canvas);stroke:var(--ink-3);stroke-width:1.5px}.bl-pan-atom{stroke:#00000047;stroke-width:.8px;animation:bl-dot-in .26s var(--ease) both}@keyframes bl-dot-in{0%{transform:scale(0)}}.bl-pan text{font-family:var(--font-body);text-anchor:middle}.bl-pan-mass{fill:var(--ink);font-size:13px;font-weight:800}.bl-pan-label{fill:var(--ink-3);font-size:11px}.bl-pan-more{fill:var(--ink-3);font-size:10px}.bl-elements{flex-wrap:wrap;justify-content:center;gap:6px;display:flex}.bl-elements li{background:color-mix(in srgb, var(--red) 10%, var(--surface));box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--red) 35%, transparent);transition:background-color var(--dur-2) var(--ease);border-radius:999px;align-items:center;gap:8px;padding:6px 10px;font-size:15px;display:inline-flex}.bl-elements li[data-even]{background:color-mix(in srgb, var(--green) 12%, var(--surface));box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--green) 45%, transparent)}.bl-el-symbol{align-items:center;gap:4px;display:inline-flex}.bl-el-dot{border-radius:50%;width:10px;height:10px;box-shadow:inset 0 0 0 1px #00000040}.bl-el-count{min-width:1.2em;color:var(--ink-2);text-align:center;font-weight:700}.bl-el-mark{color:var(--red-ink);font-weight:800}.bl-elements li[data-even] .bl-el-mark{color:var(--green-ink)}.bl-status{color:var(--ink-2);text-align:center;font-size:15px;line-height:1.8;position:relative}.bl-status-done{color:var(--green-ink);animation:bl-cheer .6s var(--ease);font-size:17px;font-weight:800}@keyframes bl-cheer{30%{transform:scale(1.06)}}.bl-actions{justify-content:center}.bl-foot{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;display:flex}.bl-solved{color:var(--green-ink);align-items:center;gap:4px;font-size:13px;display:inline-flex}.bl-picker{border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);justify-content:space-between;align-items:center;gap:8px;padding:8px 8px 8px 12px;display:flex}.bl-picker-now{min-width:0;color:var(--ink-2);align-items:center;gap:8px;font-size:14px;font-weight:600;display:inline-flex}.bl-list-side{display:none}@media (min-width:1000px){.bl-picker{display:none}.bl-list-side{display:flex}}.lab-list-sheet .sheet-body{flex-direction:column;gap:12px;display:flex}.lab-list-sheet .sheet-body>*{flex-shrink:0}.lab-list-sheet .lab-list-title{display:none}.lab-list-sheet .pt-books{scrollbar-width:none;flex-wrap:nowrap;overflow-x:auto}.bl-layout{align-items:start;gap:16px;display:grid}@media (min-width:1000px){.bl-layout{grid-template-columns:minmax(0,1.6fr) minmax(300px,1fr)}.bl-board{position:sticky;top:88px}.bl-list{overscroll-behavior:contain;scrollbar-width:thin;max-height:calc(100dvh - 104px);overflow-y:auto}}.bl-list{gap:12px}.bl-list>*{flex-shrink:0}.bl-list .pt-books{flex-wrap:wrap;margin-inline:0;padding-inline:0;overflow:visible}.lab-list-book{flex-direction:column;gap:6px;display:flex}.lab-list-book h3{justify-content:space-between;align-items:baseline;font-size:14px;font-weight:800;display:flex}.lab-list-book h3 span{color:var(--ink-3);font-size:12px;font-weight:600}.lab-list-book ul{flex-direction:column;gap:4px;display:flex}.lab-row{border-radius:var(--r-md);background:var(--canvas);text-align:start;width:100%;min-height:44px;transition:background-color var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease);align-items:center;gap:8px;padding:6px 10px;display:flex}@media (hover:hover){.lab-row:hover{background:var(--hl-lab-soft)}}.lab-row[aria-current=true]{background:var(--violet-soft);box-shadow:inset 0 0 0 2px var(--violet)}.bl-row-level{background:var(--green);border-radius:50%;flex:none;width:8px;height:8px}.bl-row-level[data-level=medium]{background:var(--amber)}.bl-row-level[data-level=hard]{background:var(--red)}.lab-row-equation{text-align:left;white-space:nowrap;flex:1;min-width:0;font-size:13px;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 18px),#0000);mask-image:linear-gradient(90deg,#000 calc(100% - 18px),#0000)}.lab-row-equation .chem-equation{flex-wrap:nowrap}.lab-row-equation .chem-phase{display:none}.lab-row{min-height:40px}.lab-row-page{color:var(--ink-3);flex:none;font-size:12px}.bl-row-done{width:16px;height:16px;color:var(--green-ink);flex:none}@media (max-width:639px){.bl-board{gap:12px;padding:14px 12px}.bl-scale{max-height:180px}.bl-actions{gap:4px}.bl-formula .chem-phase{display:none}.bl-actions .btn{padding-inline:12px}.bl-wide-only{display:none}.bl-elements li{padding:4px 8px;font-size:14px}}.bl-own summary{cursor:pointer}.bl-own[open] summary{margin-block-end:8px}.org-table-wrap{flex-direction:column;gap:16px;display:flex}.org-table{flex-direction:column;gap:10px;display:flex}.org-row.org-head{display:none}.org-row{border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);flex-wrap:wrap;align-items:stretch;gap:6px;padding:10px;display:flex}.org-family{flex-basis:100%;align-items:baseline;gap:8px;font-size:15px;display:flex}.org-family span{color:var(--fill-ink,var(--ink-3));font-size:13px;font-weight:600}.org-cell{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.org-cell-carbons{display:none}.org-tile{border-radius:var(--r-md);background:var(--fill,var(--canvas));min-width:88px;color:var(--fill-ink,var(--ink));text-align:start;transition:transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease);flex-direction:column;align-items:flex-start;gap:2px;padding:8px 10px;display:flex}.org-tile[aria-pressed=true]{box-shadow:0 0 0 2px var(--fill-ink,var(--ink))}@media (hover:hover){.org-tile:hover{transform:translateY(-2px)}}.org-tile-name{font-size:14px;font-weight:700}.org-tile-formula{opacity:.85;font-size:13px}@media (min-width:1100px){.org-table{grid-template-columns:9.5rem repeat(var(--cols), minmax(4.75rem, 1fr));border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);gap:6px;padding:14px;display:grid}.org-row,.org-row.org-head{display:contents}.org-carbons{color:var(--ink-3);text-align:center;font-size:12px}.org-family{border-radius:var(--r-md);background:var(--fill);color:var(--fill-ink);flex-direction:column;grid-column:1;gap:2px;padding:6px 8px}.org-cell{flex-direction:column;align-items:stretch}.org-tile{min-width:0}}.org-others{border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);flex-direction:column;gap:10px;padding:14px;display:flex}.org-others-list{flex-wrap:wrap;gap:6px;display:flex}.org-detail-wrap{scroll-margin-top:72px}.org-detail{border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);animation:st-step-in .32s var(--ease) both;flex-direction:column;gap:14px;padding:16px;display:flex}.org-detail-head{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.org-detail-name{font-size:24px;font-weight:800}.org-detail-also{color:var(--ink-3);font-size:14px}.org-detail-meta{flex-wrap:wrap;align-items:center;gap:6px;margin-block-start:8px;display:flex}.org-detail-meta .chip[data-tone]{background:var(--fill);color:var(--fill-ink)}.org-detail-formula{font-size:18px;font-weight:600}.org-detail-body{gap:16px;display:grid}@media (min-width:768px){.sheet-panel.org-sheet{width:min(520px,100% - 24px)}}.org-sheet .org-detail{box-shadow:none;background:0 0;padding:0;animation:none}.org-structure{border-radius:var(--r-md);background:var(--canvas);flex-direction:column;gap:10px;padding:12px;display:flex}.org-structure figcaption{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;display:flex}.org-svg{min-height:120px;color:var(--ink);justify-content:center;align-items:center;display:flex}.org-svg svg{max-width:100%;height:auto;max-height:240px;overflow:visible}.org-svg-small{min-height:64px}.org-svg-small svg{max-height:80px}.mol line{stroke:currentColor;stroke-width:1.5px;stroke-linecap:round}.mol text{fill:currentColor;font-family:var(--font-body);text-anchor:middle;dominant-baseline:central;font-size:13px;font-weight:600}.mol .mol-sub,.mol .mol-sup{font-size:9px}.mol .mol-O{fill:#c2410c}.mol .mol-N{fill:#1d4ed8}.mol .mol-Cl,.mol .mol-F,.mol .mol-Br{fill:#0f766e}.org-facts{flex-direction:column;gap:14px;min-width:0;display:flex}.org-fact-group{flex-direction:column;gap:6px;display:flex}.org-fact-group h3{color:var(--ink-3);font-size:13px;font-weight:700}.org-fact-group ul{flex-direction:column;gap:6px;display:flex}.org-fact{border-radius:var(--r-md);background:var(--canvas);flex-wrap:wrap;align-items:baseline;gap:4px 10px;padding:8px 12px;font-size:15px;line-height:1.9;display:flex}.org-fact-star{box-shadow:inset 3px 0 0 var(--amber)}.org-star{width:15px;height:15px;color:var(--amber)}.org-quiet{color:var(--ink-3);font-size:14px}.org-reaction{border-radius:var(--r-md);background:var(--canvas);flex-direction:column;gap:6px;padding:10px 12px;display:flex}.org-reaction-title{flex-wrap:wrap;align-items:center;gap:8px;font-size:15px;font-weight:600;display:flex}.org-equation{text-align:left;scrollbar-width:thin;max-width:100%;font-size:15px;overflow-x:auto}.org-reaction-foot,.org-polymer-links{flex-wrap:wrap;align-items:center;gap:6px;display:flex}[data-kind=combustion]{--kind:#e8833a}[data-kind=addition]{--kind:var(--blue)}[data-kind=polymerization]{--kind:var(--violet)}[data-kind=esterification]{--kind:#1f9e5a}[data-kind=hydrolysis]{--kind:#0e8f8a}[data-kind=neutralization]{--kind:#c2477a}[data-kind=other]{--kind:var(--ink-3)}.org-map-view{align-items:start;gap:16px;display:grid}@media (min-width:1000px){.org-map-view{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr)}.org-map-side{position:sticky;top:88px}}.org-map-side{flex-direction:column;gap:10px;display:flex}.org-kinds{flex-wrap:wrap;gap:6px;display:flex}.org-kind{background:var(--surface);min-height:34px;box-shadow:inset 0 0 0 1px var(--line);border-radius:999px;align-items:center;gap:6px;padding-inline:12px;font-size:13px;font-weight:600;display:inline-flex}.org-kind[aria-pressed=true]{box-shadow:inset 0 0 0 2px var(--kind);color:var(--kind)}.org-kind-swatch{background:var(--kind);border-radius:2px;width:14px;height:4px}.org-map{border-radius:var(--r-lg);background:var(--surface);width:100%;box-shadow:var(--shadow-card);padding:8px;position:relative}.org-map svg{width:calc(100% - 16px);height:calc(100% - 16px);position:absolute;inset:8px;overflow:visible}.org-road{fill:none;stroke:var(--kind);stroke-linecap:round;opacity:.75;transition:opacity var(--dur-2) var(--ease)}.org-arrow{fill:var(--kind)}.org-road-lit{opacity:1}.org-road-dim{opacity:.1}.org-node{background:var(--fill,var(--hl-lab-soft));max-width:30%;color:var(--fill-ink,var(--violet));box-shadow:0 1px 0 #0000000f, inset 0 0 0 1px color-mix(in srgb, var(--fill-ink,var(--violet)) 25%, transparent);white-space:nowrap;transition:transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease);border-radius:999px;padding:6px 12px;font-size:13px;font-weight:800;line-height:1.4;position:absolute;transform:translate(-50%,-50%)}.org-node[aria-pressed=true]{box-shadow:0 0 0 3px var(--fill-ink,var(--violet));transform:translate(-50%,-50%)scale(1.08)}.org-node[data-node=burnt]{--fill:#fde7d6;--fill-ink:#9a4a12}.org-flow{flex-direction:column;gap:14px;min-width:0;display:flex}.org-flow-group{flex-direction:column;gap:8px;display:flex}.org-flow-kind{color:var(--kind);align-items:center;gap:8px;font-size:14px;font-weight:800;display:flex}.org-flow-list{flex-direction:column;gap:8px;display:flex}.org-flow-card{border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card), inset -3px 0 0 var(--kind);flex-direction:column;gap:8px;padding:12px 14px;display:flex}.org-flow-title{font-size:15px;font-weight:700}.org-flow-line{flex-wrap:wrap;align-items:center;gap:6px 10px;display:flex}.org-flow-side{flex-wrap:wrap;gap:4px;display:flex}.org-flow-chip{background:var(--fill,var(--canvas));min-height:30px;color:var(--fill-ink,var(--ink));border-radius:999px;padding:3px 10px;font-size:13px;font-weight:700}.org-flow-polymer{background:var(--violet-soft);color:var(--violet)}.org-flow-burnt{color:#9a4a12;background:#fde7d6}.org-flow-note{color:var(--ink-3);font-size:13px}.org-flow-arrow{color:var(--kind);font-size:20px;font-weight:800}.org-wall-view{flex-direction:column;gap:12px;display:flex}.org-wall-bar{flex-wrap:wrap;align-items:center;gap:8px 14px;display:flex}.org-wall{grid-template-columns:repeat(auto-fill,minmax(min(280px,100%),1fr));gap:12px;display:grid}.org-polymer{border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);flex-direction:column;align-items:stretch;gap:6px;padding:14px;display:flex}.org-monomers{flex-wrap:wrap;justify-content:center;gap:6px;display:flex}.org-monomers .org-monomer{flex:120px}.org-monomer{border-radius:var(--r-md);background:var(--canvas);flex-direction:column;align-items:center;gap:2px;padding:6px;font-size:13px;font-weight:600;display:flex}.org-polymer-arrow{color:var(--violet);text-align:center;font-size:20px;line-height:1}.org-polymer-face{border-radius:var(--r-md);background:var(--hl-lab-soft);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:4px;min-width:0;min-height:96px;padding:8px;display:flex}.org-polymer[data-hidden] .org-polymer-face{background:var(--violet);color:var(--surface);cursor:pointer}.org-polymer-back{font-size:30px;font-weight:800}.org-polymer-name{font-size:16px}.org-polymer-facts{flex-direction:column;grid-column:1/-1;gap:4px;font-size:14px;line-height:1.8;display:flex}.org-polymer-facts li{flex-wrap:wrap;gap:2px 8px;display:flex}.org-review{flex-direction:column;gap:12px;display:flex}.org-boxes{grid-template-columns:repeat(6,minmax(0,1fr));gap:6px;display:grid}.org-box{border-radius:var(--r-md);background:var(--surface);box-shadow:var(--shadow-card);flex-direction:column;align-items:center;padding:8px 4px;display:flex;position:relative;overflow:hidden}.org-box:before{height:var(--fill-pct,0%);background:var(--hl-lab-soft);content:"";position:absolute;inset:auto 0 0}.org-box b,.org-box small{position:relative}.org-box small{color:var(--ink-3);font-size:11px}.org-card{gap:14px}.org-card-count{color:var(--ink-3);align-items:center;gap:10px;font-size:13px;display:flex}.org-card-count .bl-progress-bar{flex:1}.org-card-right{color:var(--green-ink);align-items:center;gap:3px;font-weight:700;display:inline-flex}.org-card .st-verdict{position:relative}.org-card-prompt{flex-direction:column;align-items:flex-start;gap:8px;font-size:18px;font-weight:600;line-height:1.9;display:flex}.org-review-svg{align-self:center}.org-options{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px;display:grid}.org-option{border-radius:var(--r-md);background:var(--canvas);min-height:52px;box-shadow:inset 0 0 0 1px var(--line);transition:background-color var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);padding:8px 12px;font-size:16px;font-weight:600}.org-option:not(:disabled):active{transform:scale(.97)}.org-option-right{background:color-mix(in srgb, var(--green) 18%, var(--surface));box-shadow:inset 0 0 0 2px var(--green)}.org-option-wrong{background:color-mix(in srgb, var(--red) 14%, var(--surface));box-shadow:inset 0 0 0 2px var(--red)}.org-card-after{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;display:flex}}