.hub{flex-direction:column;gap:22px;max-width:1080px;display:flex}.hub-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px;display:flex}.hub-where{color:var(--text3);margin-bottom:6px;font-size:13.5px}.hub-where b{color:var(--pen-text);font-weight:600}.hub-title{font-family:var(--font-serif);font-variation-settings:"opsz" 144;letter-spacing:-.02em;color:var(--text);overflow-wrap:anywhere;font-size:clamp(30px,4vw,44px);font-weight:500;line-height:1.05}.hub-head-side{flex-wrap:wrap;align-items:center;gap:16px;display:flex}.hub-events{border-bottom:.5px solid var(--border2);flex-wrap:wrap;gap:4px 22px;margin-bottom:-8px;display:flex}.hub-events button{min-height:38px;font:inherit;color:var(--text3);text-align:left;cursor:pointer;background:0 0;border:0;border-bottom:2px solid #0000;margin-bottom:-.5px;padding:0 0 4px;font-size:14px;font-weight:600}.hub-events button:hover{color:var(--text)}.hub-events button[aria-pressed=true]{color:var(--text);border-bottom-color:var(--pen-mark)}.hub-events button:focus-visible{outline:2px solid var(--pen-mark);outline-offset:2px}@media (max-width:768px){.hub-events button{min-height:44px}}a.db-linkbtn{align-items:center;text-decoration:none;display:inline-flex}a.db-linkbtn:hover{text-underline-offset:3px;text-decoration:underline}.hub-grid{grid-template-columns:minmax(250px,.9fr) minmax(0,1.25fr);gap:34px;display:grid}.hub-topics-head{color:var(--text3);justify-content:space-between;gap:12px;margin-bottom:4px;font-size:12.5px;display:flex}.hub-topics>li{border-bottom:.5px dashed var(--border2)}.hub-topics>li:last-child{border-bottom:0}a.hub-topic{min-height:44px;color:inherit;grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"name go""bar go";align-items:center;gap:7px 14px;padding:11px 0;text-decoration:none;display:grid}a.hub-topic:hover .hub-topic-name>span:first-child{text-underline-offset:3px;text-decoration:underline}a.hub-topic:focus-visible{outline:2px solid var(--pen-mark);outline-offset:3px;border-radius:6px}.hub-topic-name{color:var(--text);grid-area:name;justify-content:space-between;gap:10px;min-width:0;font-size:14.5px;display:flex}.hub-topic-name>span:first-child{overflow-wrap:anywhere;min-width:0}.hub-topic-name>span:last-child{white-space:nowrap;color:var(--text3);font-variant-numeric:tabular-nums;font-size:13px}.hub-topic .rm-mini{grid-area:bar}.hub-topic-go{width:32px;height:32px;color:var(--text3);border-radius:50%;grid-area:go;justify-content:center;align-items:center;transition:color .15s,background .15s;display:inline-flex}a.hub-topic:hover .hub-topic-go{background:var(--btn-bg);color:var(--btn-fg)}.hub-more{margin-top:6px}.hub-how{margin-top:10px}.hub-how-row{flex-wrap:wrap;align-items:center;gap:0 20px;display:flex}.hub-how .rm-explain{margin-top:4px}.hub-lines{background:var(--card-bg);border:.5px solid var(--border2);border-radius:14px;margin:0;padding:0;list-style:none;overflow:hidden}.hub-lines>li+li{border-top:.5px solid var(--border2)}a.hub-line{min-height:64px;color:var(--text);grid-template-columns:minmax(0,1fr) auto 32px;grid-template-areas:"name state go""what state go";align-items:center;gap:3px 16px;padding:14px 20px;text-decoration:none;transition:background .15s;display:grid}a.hub-line:hover{background:var(--bg2)}a.hub-line:hover .hub-line-name{text-underline-offset:3px;text-decoration:underline;text-decoration-thickness:1px}a.hub-line:focus-visible{outline:2px solid var(--pen-mark);outline-offset:-2px}.hub-line-name{font-family:var(--font-serif);overflow-wrap:anywhere;grid-area:name;font-size:19px;line-height:1.2}.hub-line-what{color:var(--text2);grid-area:what;font-size:13.5px;line-height:1.45}.hub-line-state{color:var(--pen-text);white-space:nowrap;text-align:right;grid-area:state;font-size:12.5px;font-weight:600}.hub-line-go{width:32px;height:32px;color:var(--text3);border-radius:50%;grid-area:go;justify-content:center;align-items:center;transition:color .15s,background .15s;display:inline-flex}a.hub-line:hover .hub-line-go{background:var(--btn-bg);color:var(--btn-fg)}@media (max-width:560px){a.hub-line{grid-template-columns:minmax(0,1fr) 32px;grid-template-areas:"name go""what go""state go";padding:14px 16px}.hub-line-state{text-align:left;white-space:normal;margin-top:2px}}.hub-pair{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);align-items:start;gap:22px;display:grid}.hub-side{flex-direction:column;gap:22px;min-width:0;display:flex}.hub-plan-lede{color:var(--text2);max-width:62ch;margin-top:8px;font-size:14.5px;line-height:1.6}.hub-plan-steps{flex-direction:column;margin-top:18px;list-style:none;display:flex}.hub-plan-step{border-top:.5px solid var(--border2);grid-template-columns:34px minmax(0,1fr);gap:14px;padding:15px 0;display:grid}.hub-plan-step:first-child{border-top:0;padding-top:4px}.hub-plan-num{border:calc(1.5px * var(--pen-w,1)) solid var(--pen-mark);width:30px;height:30px;color:var(--pen-text);font-family:var(--font-serif);border-radius:50%;justify-content:center;align-items:center;font-size:15px;display:inline-flex}.hub-plan-step.is-done .hub-plan-num{color:var(--pen-mark);border-color:#0000}.hub-plan-step.is-done .hub-plan-num svg{width:26px;height:26px}.hub-plan-step-title{color:var(--text);flex-wrap:wrap;align-items:baseline;gap:10px;margin-bottom:4px;font-size:15.5px;font-weight:600;display:flex}.hub-plan-done{color:var(--pen-text);font-size:12px;font-weight:600}.hub-plan-text{color:var(--text2);max-width:62ch;font-size:14px;line-height:1.62}.hub-plan-items{color:var(--text2);flex-direction:column;gap:4px;margin:8px 0 0 18px;font-size:14px;line-height:1.5;display:flex}.hub-plan-items li::marker{color:var(--pen-mark)}.hub-plan-act{border:1px solid var(--border2);min-height:40px;color:var(--text);background:0 0;border-radius:999px;justify-content:center;align-items:center;margin-top:10px;padding:8px 16px;font-size:13.5px;font-weight:600;line-height:1.2;text-decoration:none;transition:border-color .15s;display:inline-flex}.hub-plan-act:hover{border-color:var(--text)}.hub-plan-act:focus-visible{outline:2px solid var(--pen-mark);outline-offset:2px}.hub-plan:not(.is-compact) .hub-plan-step:first-child:not(.is-done) .hub-plan-act{background:var(--accent);border-color:var(--accent);color:var(--btn-fg,var(--bg))}.hub-plan-step.is-now .hub-plan-num{background:var(--pen-mark);border-color:var(--pen-mark);color:var(--bg)}.hub-plan-now{border-bottom:.5px solid var(--border2);margin-bottom:15px;padding:0 0 15px 48px}.hub-plan-go-row{flex-wrap:wrap;align-items:center;gap:8px 14px;margin-top:12px;display:flex}.hub-plan-go{background:var(--btn-bg);min-height:44px;color:var(--btn-fg);overflow-wrap:anywhere;border-radius:999px;align-items:center;gap:8px;padding:10px 18px;font-size:14.5px;font-weight:600;line-height:1.2;text-decoration:none;transition:transform .15s;display:inline-flex}.hub-plan-go:hover{transform:translateY(-1px)}.hub-plan-go:focus-visible{outline:2px solid var(--pen-mark);outline-offset:2px}.hub-plan-go svg{flex:none}.hub-plan-gain{color:var(--pen-text);font-size:13px;font-weight:600}.hub-plan.is-compact .hub-plan-steps{margin-top:0}.hub-plan.is-compact .hub-plan-step{padding:12px 0}.hub-plan.is-compact .hub-plan-step:first-child{padding-top:0}.hub-chat{flex-direction:column;scroll-margin-top:90px;display:flex}.hub-chat-body{flex-direction:column;min-height:0;display:flex}.hub-chat-log{flex-direction:column;gap:16px;height:min(460px,62vh);padding:22px 24px 12px;display:flex;overflow-y:auto}.hub-chat-log.is-empty{height:auto}.hub-chat-empty{flex-direction:column;gap:16px;display:flex}.hub-chat-hello{color:var(--text2);font-size:14.5px;line-height:1.6}.hub-chat-chips{flex-direction:column;align-items:flex-start;gap:8px;display:flex}.hub-chat-chip{border:1px solid var(--border2);min-height:40px;color:var(--text);font:inherit;text-align:left;cursor:pointer;background:0 0;border-radius:12px;padding:8px 14px;font-size:13.5px;line-height:1.35;transition:border-color .15s}.hub-chat-chip:hover:not(:disabled){border-color:var(--text)}.hub-chat-chip:disabled{opacity:.55;cursor:default}.hub-chat-more{align-self:flex-start;margin-top:8px}.hub-chat-msg{flex-direction:column;gap:4px;max-width:min(100%,76ch);display:flex}.hub-chat-msg.is-user{align-self:flex-end;align-items:flex-end;max-width:min(88%,60ch)}.hub-chat-who{letter-spacing:.04em;color:var(--text3);font-size:11.5px;font-weight:700}.hub-chat-msg.is-assistant .hub-chat-who{color:var(--pen-text)}.hub-chat-text{color:var(--text);white-space:pre-line;overflow-wrap:anywhere;font-size:14.5px;line-height:1.62}.hub-chat-msg.is-user .hub-chat-text{background:var(--bg2);border-radius:12px 12px 4px;padding:9px 13px}.hub-chat-link{color:var(--pen-text);text-underline-offset:3px;overflow-wrap:anywhere;text-decoration:underline}.hub-chat-wait{color:var(--text3);font-size:13.5px}.hub-chat-dots:after{content:"...";vertical-align:bottom;width:1.2em;animation:1.2s steps(4,end) infinite hub-dots;display:inline-block;overflow:hidden}@keyframes hub-dots{0%{width:0}to{width:1.2em}}.hub-chat-error{margin:0 24px 10px}.hub-chat-form{border-top:.5px solid var(--border2);align-items:flex-end;gap:10px;padding:14px 18px;display:flex}.hub-chat-input{resize:vertical;border:1px solid var(--border2);background:var(--bg);min-width:0;min-height:44px;max-height:160px;color:var(--text);font:inherit;border-radius:10px;flex:1;padding:10px 12px;font-size:14.5px;line-height:1.45}.hub-chat-input:focus-visible{outline:2px solid var(--pen-mark);outline-offset:1px;border-color:#0000}.hub-chat-send{min-height:44px;padding-left:20px;padding-right:20px}.hub-chat-note{color:var(--text3);padding:0 18px 16px;font-size:12px;line-height:1.45}@media (max-width:980px){.hub-pair{grid-template-columns:minmax(0,1fr)}}@media (max-width:600px){.hub-chat-log{height:min(420px,64vh);padding:18px 16px 10px}.hub-chat-log.is-empty{height:auto}.hub-chat-form{padding:12px 14px}.hub-chat-note{padding:0 14px 14px}.hub-chat-chip,.hub-plan-act{min-height:44px}.hub-plan-now{padding-left:0}}@media (prefers-reduced-motion:reduce){.hub-chat-dots:after{width:1.2em;animation:none}.hub-plan-go{transition:none}.hub-plan-go:hover{transform:none}}.pr{flex-direction:column;gap:18px;max-width:760px;display:flex}.pr-top{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.pr-top-left{min-width:0}.pr-event{color:var(--text3);font-size:13px}.pr-title{font-family:var(--font-serif);color:var(--text);overflow-wrap:anywhere;font-size:clamp(24px,3vw,30px);line-height:1.1}.pr-tools{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.pr-tally{color:var(--text2);flex-wrap:wrap;gap:16px;font-size:13px;display:flex}.pr-tally b{font-family:var(--font-serif);color:var(--text);margin-right:3px;font-size:18px;font-weight:500}.pr-focus{flex-wrap:wrap;gap:8px;display:flex}.pr-chip{border:.5px solid var(--border2);background:var(--card-bg);min-height:44px;color:var(--text2);font:inherit;cursor:pointer;text-overflow:ellipsis;white-space:nowrap;border-radius:999px;align-items:center;max-width:100%;padding:0 14px;font-size:13px;font-weight:600;display:inline-flex;overflow:hidden}.pr-chip[aria-pressed=true]{background:var(--btn-bg);border-color:var(--btn-bg);color:var(--btn-fg)}.pr-select{border:.5px solid var(--border2);background:var(--input-bg,var(--card-bg));max-width:100%;min-height:44px;color:var(--text);font:inherit;border-radius:10px;padding:0 12px;font-size:16px}.pr-from{color:var(--pen-text);margin-bottom:8px;font-size:12.5px;font-weight:600}.pr-report{font:inherit;color:var(--text3);cursor:pointer;text-underline-offset:3px;background:0 0;border:0;min-height:44px;padding:0;font-size:12.5px;text-decoration:underline}.pr-report:hover{color:var(--text)}.pr-report-box{flex-direction:column;gap:8px;margin-top:10px;display:flex}.pr-report-box textarea{border:.5px solid var(--border2);background:var(--input-bg,var(--card-bg));width:100%;min-height:70px;color:var(--text);font:inherit;resize:vertical;border-radius:10px;padding:10px 12px;font-size:16px}.pr-status{color:var(--text2);padding:26px 0;font-size:15px;line-height:1.55}.pr-status strong{font-family:var(--font-serif);color:var(--text);margin-bottom:6px;font-size:22px;font-weight:500;display:block}.pr-progress{background:var(--bg3);border-radius:999px;max-width:320px;height:4px;margin-top:14px;overflow:hidden}.pr-progress i{background:var(--pen-mark);height:100%;transition:width .3s;display:block}.pr-end{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.pr-error{background:var(--attn-dim);border:.5px solid var(--attn-border);color:var(--text);border-radius:10px;padding:12px 14px;font-size:14px}.pr-typed{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.pr-typed input{border:1px solid var(--border2);background:var(--input-bg,var(--card-bg));min-height:48px;color:var(--text);font-family:var(--font-mono);border-radius:10px;flex:180px;padding:0 14px;font-size:18px}.pr-typed input.is-right{border-color:var(--green)}.pr-typed input.is-wrong{border-color:var(--red)}.pr-key{font-family:var(--font-mono);color:var(--text);font-size:15px}.pr-typed input.is-grid{text-align:right;letter-spacing:.08em}.pr-note{color:var(--pen-text);font-size:14px;line-height:1.5}.pr-rules{background:var(--card-bg);border:.5px solid var(--border2);border-radius:10px;padding:14px 18px}.pr-rules summary{cursor:pointer;font-family:var(--font-serif);color:var(--text);min-height:44px;margin:-8px 0;padding:8px 0;font-size:18px}.pr-rules ul{color:var(--text2);flex-direction:column;gap:6px;margin:10px 0 0;padding-left:20px;font-size:14.5px;line-height:1.5;display:flex}.pr-rules li::marker{color:var(--pen-mark)}.pr-rules-src{color:var(--text3);margin-top:10px;font-size:12.5px}.coach-review-typed{color:var(--text2);flex-wrap:wrap;align-items:baseline;gap:8px 22px;font-size:15px;display:flex}.coach-review-typed strong{font-family:var(--font-mono);color:var(--text);font-weight:600}.coach-review-typed strong.is-right{color:var(--green)}.coach-review-typed strong.is-wrong{color:var(--red)}.coach-review-typed .pr-note{flex-basis:100%}.pr-summary{flex-direction:column;gap:14px;display:flex}.pr-summary-num{font-family:var(--font-serif);color:var(--text);font-size:54px;line-height:1}.pr-summary-num small{color:var(--text2);font-size:.45em}.rmd-ask{border-top:.5px dashed var(--border2);color:var(--text2);flex-wrap:wrap;align-items:center;gap:2px 18px;margin-top:6px;padding-top:10px;font-size:13.5px;line-height:1.5;display:flex}.rmd-ask-text{flex:260px;padding:10px 0}.rmd-ask-actions{gap:18px;display:flex}.rmd-ask .rmd-ask-yes{color:var(--pen-text)}.calc-toggle{border:.5px solid var(--border2);background:var(--card-bg);min-height:44px;color:var(--text);font:inherit;cursor:pointer;border-radius:999px;align-items:center;gap:8px;padding:0 14px;font-size:13px;font-weight:600;display:inline-flex}.calc-toggle[aria-pressed=true]{background:var(--btn-bg);border-color:var(--btn-bg);color:var(--btn-fg)}.calc-toggle:disabled{opacity:.45;cursor:not-allowed}.calc{z-index:1100;background:var(--card-bg);border:1px solid var(--border2);width:288px;box-shadow:0 2px 4px rgba(var(--shadow-rgb-deep,20, 16, 8), .08), 0 30px 60px -30px rgba(var(--shadow-rgb-deep,20, 16, 8), .6);border-radius:16px;outline:none;padding:0 14px 14px;position:fixed;bottom:100px;right:24px}.calc:focus-visible{box-shadow:0 0 0 2px var(--text), 0 30px 60px -30px rgba(var(--shadow-rgb-deep,20, 16, 8), .6)}.calc-bar{cursor:grab;touch-action:none;-webkit-user-select:none;user-select:none;justify-content:space-between;align-items:center;min-height:44px;display:flex}.calc-bar:active{cursor:grabbing}.calc-title{color:var(--text2);font-size:12.5px;font-weight:700}.calc-close{width:44px;height:44px;color:var(--text2);cursor:pointer;background:0 0;border:0;justify-content:center;align-items:center;margin-right:-10px;display:inline-flex}.calc-close:hover{color:var(--text)}.calc-screen{background:var(--bg);border:1px solid var(--border2);border-radius:10px;flex-direction:column;align-items:flex-end;min-height:72px;padding:8px 48px 10px 12px;display:flex;position:relative}.calc-pending{min-height:16px;font-family:var(--font-mono);color:var(--text3);font-size:12px}.calc-display{font-family:var(--font-mono);color:var(--text);font-variant-numeric:tabular-nums;text-overflow:ellipsis;white-space:nowrap;max-width:100%;font-size:28px;line-height:1.15;overflow:hidden}.calc-back{width:44px;height:44px;color:var(--text2);cursor:pointer;background:0 0;border:0;justify-content:center;align-items:center;display:inline-flex;position:absolute;top:50%;right:2px;transform:translateY(-50%)}.calc-keys{grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;margin-top:12px;display:grid}.calc-key{border:.5px solid var(--border2);background:var(--bg);min-height:46px;color:var(--text);font-family:var(--font-mono);cursor:pointer;border-radius:10px;font-size:17px;transition:background .1s,transform 50ms}.calc-key:hover{background:var(--bg2)}.calc-key:active{transform:translateY(1px)}.calc-key.is-mem{min-height:40px;color:var(--text2);background:0 0;font-size:13px}.calc-key.is-fn{color:var(--text2)}.calc-key.is-op{color:var(--pen-text);font-weight:700}.calc-key.is-eq{background:var(--btn-bg);color:var(--btn-fg);border-color:var(--btn-bg);font-weight:700}.calc-key.is-eq:hover{opacity:.9}.calc-note{color:var(--text3);margin-top:10px;font-size:12px;line-height:1.45}@media (min-width:1200px){.app-main-content>.is-calc-open{margin-inline:0 auto}}@media (max-width:640px){.calc{width:auto;padding-bottom:calc(14px + env(safe-area-inset-bottom,0px));border-radius:16px 16px 0 0;inset:auto 0 0!important}.calc-bar{cursor:default}.calc-key{min-height:48px}}.lb{background:var(--card-bg);border:.5px solid var(--border2);border-radius:14px;overflow:hidden}.lb-head{border-bottom:.5px solid var(--border2);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:16px 22px;display:flex}.lb-head h2{font-size:20px}.lb-head p{color:var(--text3);font-size:13px}.lb ol{list-style:none}.lb-row{border-bottom:.5px solid var(--border);grid-template-columns:44px minmax(0,1fr) auto auto;align-items:center;gap:14px;padding:12px 22px;display:grid}.lb-row:last-child{border-bottom:0}.lb-rank{font-family:var(--font-serif);color:var(--text2);font-variant-numeric:tabular-nums;font-size:20px}.lb-row.is-top .lb-rank{color:var(--pen-text)}.lb-name{min-width:0;color:var(--text);flex-wrap:wrap;align-items:center;gap:8px;font-size:15px;font-weight:600;display:flex}.lb-tag{border:1px solid var(--text3);color:var(--text3);border-radius:4px;align-items:center;padding:1px 7px;font-size:11px;font-weight:600;display:inline-flex}.lb-tag.is-you{border-color:var(--pen-mark);color:var(--pen-text)}.lb-answered{color:var(--text3);white-space:nowrap;font-size:12.5px}.lb-score{font-family:var(--font-serif);text-align:right;min-width:58px;color:var(--text);font-variant-numeric:tabular-nums;font-size:22px}.lb-row.is-me{background:color-mix(in srgb, var(--pen-mark) 7%, transparent)}.lb-mine{border-top:1px dashed var(--border2)}.lb-foot{border-top:.5px solid var(--border2);color:var(--text3);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:12px 22px;font-size:12.5px;display:flex}.lb-tabs{flex-wrap:wrap;gap:8px;display:flex}.lb-switch{border:1px solid var(--border);background:var(--card-bg);border-radius:999px;align-self:flex-start;width:fit-content;padding:3px;display:inline-flex}.lb-switch button{min-height:34px;font:inherit;color:var(--text3);cursor:pointer;background:0 0;border:0;border-radius:999px;padding:0 18px;font-size:13.5px;font-weight:600}.lb-switch button:hover{color:var(--text)}.lb-switch button[aria-pressed=true]{background:var(--text);color:var(--bg)}.lb-switch button:focus-visible{outline:2px solid var(--pen-mark);outline-offset:2px}.lb-event{color:var(--text3);flex-basis:100%;font-size:12.5px;font-weight:400}.lb-empty{padding:20px 22px}.lb-note{color:var(--text3);font-size:13px}@media (max-width:768px){.lb-switch button{min-height:44px}}.su{flex-direction:column;gap:20px;max-width:760px;display:flex}.su-steps{flex-wrap:wrap;gap:6px;list-style:none;display:flex}.su-steps li{background:var(--bg3);border-radius:999px;flex:40px;min-width:40px;height:4px}.su-steps li.is-done{background:var(--pen-mark)}.su-steps li.is-now{background:var(--text)}.su-q{font-family:var(--font-serif);color:var(--text);font-size:clamp(26px,3.4vw,36px);line-height:1.12}.su-sub{color:var(--text2);max-width:60ch;font-size:14.5px;line-height:1.55}.su-choices{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;display:grid}.su-choice{border:.5px solid var(--border2);background:var(--card-bg);min-height:76px;color:var(--text);text-align:left;font:inherit;cursor:pointer;border-radius:12px;flex-direction:column;align-items:flex-start;gap:4px;padding:14px 16px;transition:border-color .15s,box-shadow .15s;display:flex}.su-choice:hover{border-color:var(--text3)}.su-choice[aria-pressed=true]{border-color:var(--text);box-shadow:0 0 0 1px var(--text)}.su-choice-glyph{margin-bottom:6px}.su-choice-name{font-family:var(--font-serif);font-size:20px;line-height:1.15}.su-choice-sub{color:var(--text3);font-size:12.5px;line-height:1.4}.su-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.su-next{border-top:.5px solid var(--border2);flex-direction:column;gap:6px;padding-top:18px;display:flex}.su-next-title{font-family:var(--font-serif);color:var(--text);font-size:22px;font-weight:400;line-height:1.2}.su-next-text{color:var(--text2);max-width:60ch;font-size:14.5px;line-height:1.55}.su-next-gain{color:var(--pen-text);font-size:13px;font-weight:600}.su-field{flex-direction:column;gap:8px;max-width:420px;display:flex}.su-field label{color:var(--text2);font-size:13px;font-weight:600}.su-field>.db-linkbtn{align-self:flex-start}.su-field input{border:.5px solid var(--border2);background:var(--input-bg,var(--card-bg));min-height:48px;color:var(--text);font:inherit;border-radius:10px;padding:0 14px;font-size:16px}@media (max-width:820px){.hub-grid{grid-template-columns:1fr;gap:24px}}@media (max-width:560px){.lb-row{grid-template-columns:34px minmax(0,1fr) auto;gap:10px;padding:12px 16px}.lb-answered{display:none}.lb-head,.lb-foot{padding-left:16px;padding-right:16px}}.pr-sample{flex-direction:column;align-items:flex-start;gap:14px;display:flex}.pr-sample>.sheet-stack{width:100%}.pr-sample-text{color:var(--text2);max-width:62ch;font-size:14.5px;line-height:1.6}.hub-invite{background:var(--brand-dim);border:.5px solid var(--brand-border);border-radius:14px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:16px 20px;display:flex}.hub-invite p{color:var(--text);max-width:64ch;font-size:14.5px;line-height:1.5}.ln-topics{border-top:.5px solid var(--border2);flex-direction:column;list-style:none;display:flex}.ln-topic{border-bottom:.5px solid var(--border2);color:var(--text);grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"name go""meta go";align-items:center;gap:4px 16px;padding:14px 4px;text-decoration:none;display:grid}.ln-topic:hover .ln-topic-name{text-underline-offset:3px;text-decoration:underline}.ln-topic-name{font-family:var(--font-serif);overflow-wrap:anywhere;grid-area:name;font-size:19px;line-height:1.25}.ln-topic-meta{color:var(--text3);grid-area:meta;font-size:13px}.ln-topic-go{border:.5px solid var(--border2);border-radius:999px;grid-area:go;align-items:center;min-height:44px;padding:0 16px;font-size:13px;font-weight:600;display:inline-flex}.ln-topic:hover .ln-topic-go{background:var(--btn-bg);color:var(--btn-fg);border-color:var(--btn-bg)}.ln-lesson{background:var(--card-bg);border:.5px solid var(--border2);border-radius:8px;flex-direction:column;gap:14px;padding:26px 28px;display:flex}.ln-summary{font-family:var(--font-serif);color:var(--text);font-size:20px;line-height:1.5}.ln-h{font-size:13px;font-family:var(--font-body);color:var(--pen-text);margin-top:8px;font-weight:700}.ln-points{flex-direction:column;display:flex}.ln-point{border-bottom:.5px dashed var(--border2);padding:12px 0}.ln-point:last-child{border-bottom:0}.ln-point dt{font-family:var(--font-serif);color:var(--text);margin-bottom:3px;font-size:17px}.ln-point dd{color:var(--text2);font-size:15px;line-height:1.6}.ln-example{background:var(--bg);border:.5px solid var(--border2);border-radius:10px;padding:16px 18px}.ln-problem{color:var(--text);margin-bottom:10px;font-size:15px;line-height:1.6}.ln-example ol{color:var(--text2);flex-direction:column;gap:6px;padding-left:20px;font-size:14.5px;line-height:1.55;display:flex}.ln-answer{font-family:var(--font-serif);color:var(--text);margin-top:12px;font-size:18px}.ln-answer span{font-family:var(--font-body);color:var(--pen-text);margin-right:8px;font-size:12px;font-weight:700}.ln-traps{flex-direction:column;gap:8px;list-style:none;display:flex}.ln-traps li{color:var(--text2);padding-left:22px;font-size:14.5px;line-height:1.55;position:relative}.ln-traps li:before{content:"";border:1.5px solid var(--pen-mark);border-radius:50%;width:10px;height:10px;position:absolute;top:.55em;left:2px}.ln-note{color:var(--text3);flex-wrap:wrap;align-items:center;gap:8px;margin-top:6px;font-size:12.5px;display:flex}.fc{flex-direction:column;gap:16px;display:flex}.fc-top{color:var(--text3);flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;display:flex}.fc-top span:first-child{overflow-wrap:anywhere;min-width:0;color:var(--text2);font-weight:600}.fc-card{cursor:pointer;perspective:1400px;width:100%;min-height:260px;font:inherit;color:var(--text);text-align:center;background:0 0;border:0;padding:0;display:grid;position:relative}.fc-face{border:.5px solid var(--border2);background:linear-gradient(to bottom, transparent 36px, color-mix(in srgb, var(--pen-mark) 55%, transparent) 36px 37.5px, transparent 37.5px), repeating-linear-gradient(to bottom, transparent 0 27px, color-mix(in srgb, var(--text3) 16%, transparent) 27px 28px) 0 37px / 100% calc(100% - 37px) no-repeat, var(--card-bg);box-shadow:0 1px 2px rgba(var(--shadow-rgb-deep,20, 16, 8), .06), 0 26px 50px -34px rgba(var(--shadow-rgb-deep,20, 16, 8), .55);backface-visibility:hidden;border-radius:6px;flex-direction:column;grid-area:1/1;justify-content:center;align-items:center;gap:14px;padding:44px 30px 30px;transition:transform .5s cubic-bezier(.22,.61,.36,1);display:flex}.fc-back{transform:rotateY(180deg)}.fc-card.is-flipped .fc-front{transform:rotateY(-180deg)}.fc-card.is-flipped .fc-back{transform:rotateY(0)}.fc-text{font-family:var(--font-serif);overflow-wrap:anywhere;max-width:32ch;font-size:clamp(22px,3vw,30px);line-height:1.3}.fc-answer{color:var(--text);max-width:46ch;font-size:clamp(18px,2.2vw,22px)}.fc-back-front{color:var(--text3);font-size:13px}.fc-hint{color:var(--text3);font-size:12.5px}.fc-card:focus-visible .fc-face{outline:2px solid var(--text);outline-offset:3px}.fc-grades{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.fc-grade{border:.5px solid var(--border2);background:var(--card-bg);min-height:52px;color:var(--text);font:inherit;cursor:pointer;border-radius:12px;justify-content:center;align-items:center;gap:8px;font-size:15px;font-weight:600;display:inline-flex}.fc-grade:hover{border-color:var(--text3)}.fc-grade.is-again{border-color:var(--attn-border);color:var(--attn)}.fc-grade.is-flip{background:var(--btn-bg);color:var(--btn-fg);border-color:var(--btn-bg);grid-column:1/-1}.fc-grade kbd{font-family:var(--font-mono);opacity:.6;border:.5px solid;border-radius:4px;padding:1px 6px;font-size:11px}.fc-foot{justify-content:flex-start;display:flex}@media (max-width:560px){.fc-face{padding:40px 18px 24px}.fc-grade kbd{display:none}.ln-lesson{padding:20px 18px}}@media (prefers-reduced-motion:reduce){.fc-face{transition:none}}.su-field-label{color:var(--text2);font-size:13px;font-weight:600}.ref{border-top:.5px solid var(--border2);flex-direction:column;gap:14px;margin-top:26px;padding-top:22px;display:flex}.ref-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.ref-title{font-family:var(--font-serif);color:var(--text);font-size:clamp(22px,2.6vw,28px);font-weight:500;line-height:1.15}.ref-note{color:var(--text2);max-width:56ch;margin-top:4px;font-size:14px;line-height:1.5}.ref-groups{grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr));gap:14px;display:grid}.ref-group{background:var(--card-bg);border:.5px solid var(--border2);border-radius:10px;padding:14px 16px}.ref-group-name{font-family:var(--font-serif);color:var(--text);margin-bottom:8px;font-size:17px;font-weight:500}.ref-group ul{flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;display:flex}.ref-line{border:0;border-bottom:.5px dashed var(--border);width:100%;min-height:40px;color:var(--text);font:inherit;text-align:left;background:0 0;flex-wrap:wrap;gap:4px 6px;padding:8px 0;font-size:14.5px;line-height:1.4;display:flex}button.ref-line{cursor:pointer}.ref-line.is-static{align-items:baseline}.ref-right{color:var(--text);font-weight:600}.ref-blank{color:var(--text3);font-style:italic}