:root{--bg: #100e0b;--bg-elev-1: #18150f;--bg-elev-2: #221e16;--bg-elev-3: #2b261c;--stage: #0a0908;--border: #2e2920;--border-strong: #3d362a;--text: #f2ede2;--text-dim: #a8a091;--text-faint: #6f685a;--accent: #eab63f;--accent-hover: #f4c558;--accent-press: #d9a531;--accent-ink: #2a1d05;--accent-soft: rgba(234,182,63,.14);--accent-line: rgba(234,182,63,.45);--accent-glow: rgba(234,182,63,.32);--good: #5fc98a;--good-soft: rgba(95,201,138,.14);--again: #ef7a6b;--again-soft: rgba(239,122,107,.14);--r-again: #ef7a6b;--r-again-soft: rgba(239,122,107,.13);--r-hard: #f0a85a;--r-hard-soft: rgba(240,168,90,.13);--r-good: #5fc98a;--r-good-soft: rgba(95,201,138,.13);--r-easy: #57c4d4;--r-easy-soft: rgba(87,196,212,.13);--r-sm: 10px;--r-md: 14px;--r-lg: 20px;--r-xl: 28px;--r-pill: 999px;--shadow-sm: 0 1px 2px rgba(0,0,0,.4);--shadow-md: 0 6px 20px rgba(0,0,0,.36);--shadow-lg: 0 18px 48px rgba(0,0,0,.5);--shadow-card: inset 0 1px 0 rgba(255,255,255,.03), 0 10px 28px rgba(0,0,0,.3);--glow-accent: 0 0 28px var(--accent-glow);--font-display: "Space Grotesk", system-ui, sans-serif;--font-body: "Hanken Grotesk", system-ui, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, monospace;--ease: cubic-bezier(.2, .8, .2, 1);--ease-out: cubic-bezier(.16, 1, .3, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--dur-1: .12s;--dur-2: .2s;--dur-3: .32s;--radius: var(--r-md);--radius-lg: var(--r-lg);--radius-sm: var(--r-sm);--easy: var(--r-easy);--hard: var(--r-hard);--es: #f0a85a;--zh: #ef7a6b;--text-muted: var(--text-dim)}:root[data-theme=light]{--bg: #f7f4ee;--bg-elev-1: #ffffff;--bg-elev-2: #efe9df;--bg-elev-3: #e5ddd0;--border: #e2d9ca;--border-strong: #cabfa9;--text: #221d14;--text-dim: #6b6253;--text-faint: #97907f;--accent: #b8842a;--accent-ink: #fffaf0;--accent-soft: rgba(184,132,42,.12);--good: #2e9e63;--again: #d2543f}*{box-sizing:border-box}html,body,#root{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-synthesis:none}::selection{background:var(--accent-soft)}button{font:inherit;color:inherit;background:var(--bg-elev-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 18px;cursor:pointer;transition:background .12s,border-color .12s,transform 80ms}button:hover{background:#252532;border-color:#3a3a4a}button:active{transform:translateY(1px)}button:disabled{opacity:.5;cursor:not-allowed}input,select{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:9px 12px;outline:none;transition:border-color .12s}input:focus,select:focus{border-color:#4a4a5e}h1,h2,h3{font-weight:600;letter-spacing:-.01em;margin:0}.app-shell{min-height:100%;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:18px;padding:14px 22px;border-bottom:1px solid var(--border);background:var(--bg-elev-1)}.topbar .brand{font-weight:700;letter-spacing:-.02em}.topbar nav{display:flex;gap:4px;margin-left:auto}.topbar nav button{padding:6px 14px;background:transparent;border-color:transparent}.topbar nav button.active{background:var(--bg-elev-2);border-color:var(--border)}.page{padding:28px 32px;max-width:1100px;margin:0 auto;width:100%;flex:1}.card-tile{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px}.lesson-body h1,.lesson-body h2,.lesson-body h3{margin:18px 0 8px;line-height:1.25}.lesson-body h1{font-size:1.5rem}.lesson-body h2{font-size:1.25rem}.lesson-body h3{font-size:1.08rem}.lesson-body p{margin:10px 0}.lesson-body ul,.lesson-body ol{margin:10px 0;padding-left:24px}.lesson-body li{margin:4px 0}.lesson-body code{background:var(--bg-elev-2, rgba(255,255,255,.06));padding:1px 5px;border-radius:4px;font-family:JetBrains Mono,ui-monospace,monospace;font-size:.92em}.lesson-body pre{background:var(--bg-elev-2, rgba(255,255,255,.06));padding:12px 14px;border-radius:6px;overflow-x:auto;margin:12px 0}.lesson-body pre code{background:transparent;padding:0}.lesson-body blockquote{border-left:3px solid var(--border);margin:10px 0;padding:4px 12px;color:var(--text-muted, #999)}.lesson-body strong{font-weight:600}.lesson-body a{color:var(--accent)}.streak-display{display:flex;align-items:center;gap:16px}.streak-flame{font-size:56px;filter:drop-shadow(0 0 18px var(--accent-glow))}.streak-number{font-size:56px;font-weight:700;letter-spacing:-.04em;background:linear-gradient(180deg,#fff 0%,var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.streak-label{color:var(--text-dim);font-size:14px}.previous-best{color:var(--text-faint);font-size:13px;margin-top:4px}.streak-countdown{margin-left:auto;display:flex;flex-direction:column;align-items:center;gap:6px}.streak-ring{width:60px;height:60px}.streak-countdown-label{font-size:11px;color:var(--text-faint);white-space:nowrap}.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:22px}.stat{background:var(--bg-elev-2);border-radius:var(--radius);padding:16px}.stat .v{font-size:28px;font-weight:700}.stat .l{color:var(--text-dim);font-size:13px;margin-top:2px}.primary{background:var(--accent);color:#1a0d08;border:none;font-weight:600;padding:14px 24px;font-size:16px;border-radius:var(--radius)}.primary:hover{background:#ff8b6e}.review-stage{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;gap:28px}.flashcard{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--radius-lg);padding:50px 60px;min-width:480px;text-align:center;display:flex;flex-direction:column;gap:14px}.flashcard .front{font-size:56px;font-weight:600;letter-spacing:-.02em}.flashcard .pinyin{color:var(--text-dim);font-size:22px;font-weight:500}.flashcard .back{color:var(--text);font-size:26px;font-weight:500;border-top:1px solid var(--border);padding-top:18px;margin-top:4px}.flashcard .lang-tag{font-size:11px;letter-spacing:.1em;color:var(--text-faint);text-transform:uppercase}.lang-tag.es{color:var(--es)}.lang-tag.zh{color:var(--zh)}.rating-row{display:flex;gap:10px}.rating-row button{min-width:110px;padding:14px 12px;display:flex;flex-direction:column;gap:4px;align-items:center;font-weight:600;border-width:1px}.rating-row button .small{font-size:11px;font-weight:400;color:var(--text-dim)}.r-again{border-color:var(--again);color:var(--again)}.r-hard{border-color:var(--hard);color:var(--hard)}.r-good{border-color:var(--good);color:var(--good)}.r-easy{border-color:var(--easy);color:var(--easy)}.session-bar{display:flex;align-items:center;gap:18px;padding:12px 20px;background:var(--bg-elev-1);border-bottom:1px solid var(--border);font-size:13px;color:var(--text-dim)}.session-bar .progress{height:6px;background:var(--bg-elev-2);border-radius:3px;flex:1;overflow:hidden}.session-bar .progress .fill{height:100%;background:linear-gradient(90deg,var(--accent),#ffb085);transition:width .3s}.toast{position:fixed;bottom:32px;left:50%;transform:translate(-50%);background:var(--bg-elev-2);border:1px solid var(--accent);color:var(--text);padding:14px 22px;border-radius:var(--radius);box-shadow:0 8px 28px #ff7a5940;font-weight:500;z-index:100;animation:toast-in .2s ease-out}@keyframes toast-in{0%{transform:translate(-50%,20px);opacity:0}to{transform:translate(-50%);opacity:1}}.onboarding{max-width:480px;margin:80px auto;display:flex;flex-direction:column;gap:22px}.onboarding h1{font-size:32px}.onboarding .step{color:var(--text-faint);font-size:12px;letter-spacing:.1em;text-transform:uppercase}.onboarding label{display:flex;flex-direction:column;gap:8px;font-size:14px;color:var(--text-dim)}.onboarding .helper{font-size:13px;color:var(--text-faint);margin-top:4px}.lang-picker{display:flex;gap:10px}.lang-picker button{flex:1;padding:18px;display:flex;flex-direction:column;align-items:center;gap:6px}.lang-picker button.selected{border-color:var(--accent);background:#1f1518}.lang-picker .flag{font-size:28px}.settings-section{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-bottom:16px}.settings-section h2{font-size:17px;margin-bottom:14px}.settings-row{display:flex;align-items:center;gap:14px;margin-bottom:12px}.settings-row label{flex:1;color:var(--text-dim);font-size:14px}.settings-row input{flex:1;max-width:240px}.empty{text-align:center;padding:40px;color:var(--text-dim)}.passage-text{font-size:18px;line-height:1.9;color:var(--text)}.passage-word{cursor:pointer;border-radius:3px;transition:background .1s}.passage-word:hover{background:var(--bg-elev-2)}.passage-word.added{color:var(--good)}.passage-text.zh{display:flex;flex-wrap:wrap;gap:2px 4px;align-items:flex-end;line-height:1}.zh-token{display:flex;flex-direction:column;align-items:center;cursor:pointer;padding:2px 3px;border-radius:4px;transition:background .1s}.zh-token:hover{background:var(--bg-elev-2)}.zh-token.added .zh-char{color:var(--good)}.zh-pinyin{font-size:11px;color:var(--text-faint);line-height:1.4}.zh-char{font-size:22px;line-height:1.2;font-family:Noto Sans SC,sans-serif}.zh-punct{font-size:22px;color:var(--text-faint);align-self:flex-end}.vocab-chip{display:flex;align-items:center;gap:8px;background:var(--bg-elev-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:7px 12px;cursor:pointer;transition:border-color .1s;font-size:14px}.vocab-chip:hover{border-color:#4a4a5e}.vocab-word{font-weight:600}.vocab-pinyin{color:var(--text-dim);font-size:12px}.vocab-trans{color:var(--text-dim)}.translation-popover{position:fixed;right:32px;bottom:32px;width:320px;background:var(--bg-elev-2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:18px 20px;box-shadow:0 12px 40px #00000080;z-index:50;display:flex;flex-direction:column;gap:8px}.pop-loading{color:var(--text-dim);font-size:14px}.pop-word{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:600}.pop-pinyin{font-size:14px;color:var(--text-dim);font-weight:400}.pop-pos{font-size:11px;color:var(--text-faint);background:var(--bg);padding:2px 7px;border-radius:4px;font-weight:400}.pop-audio{margin-left:auto;background:none;border:none;font-size:18px;padding:2px 6px;cursor:pointer}.pop-translation{font-size:17px;color:var(--text)}.pop-example{font-size:13px;color:var(--text-dim);font-style:italic;border-top:1px solid var(--border);padding-top:8px}.pop-notes{font-size:12px;color:var(--text-faint)}.pop-add{margin-top:4px;padding:8px 14px;background:var(--accent);color:#1a0d08;border:none;border-radius:var(--radius-sm);font-weight:600;cursor:pointer;font-size:13px}.pop-add:disabled{opacity:.5;cursor:default}.tone-play{font-size:20px;font-weight:600;padding:20px 40px;background:var(--bg-elev-2);border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:border-color .12s}.tone-play:hover:not(:disabled){border-color:var(--accent)}.tone-pair-display{display:flex;align-items:center;gap:14px;margin-top:8px}.tone-badge{padding:6px 14px;border-radius:var(--radius-sm);font-size:14px;font-weight:600;background:var(--bg-elev-2);border:1px solid var(--border)}.tone-badge[data-tone="1"]{border-color:var(--easy);color:var(--easy)}.tone-badge[data-tone="2"]{border-color:var(--good);color:var(--good)}.tone-badge[data-tone="3"]{border-color:var(--hard);color:var(--hard)}.tone-badge[data-tone="4"]{border-color:var(--again);color:var(--again)}.tone-badge[data-tone="5"]{border-color:var(--text-dim);color:var(--text-dim)}.plan-list{display:flex;flex-direction:column;gap:6px}.plan-row{display:flex;align-items:center;gap:14px;padding:12px 14px;background:var(--bg-elev-2);border:1px solid var(--border);border-radius:var(--radius-sm);transition:border-color .12s}.plan-row--high{border-left:3px solid var(--accent)}.plan-row--done{opacity:.55}.plan-icon{font-size:22px;width:32px;text-align:center;flex-shrink:0}.plan-info{flex:1;min-width:0}.plan-label{font-weight:600;font-size:14px}.plan-desc{color:var(--text-dim);font-size:12px;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.plan-meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px;flex-shrink:0}.plan-minutes{font-size:12px;color:var(--text-faint)}.plan-priority-badge{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--accent);background:var(--accent-glow);padding:2px 6px;border-radius:3px}.plan-start-btn{padding:7px 16px;font-size:13px;font-weight:600;background:var(--bg);border-color:var(--border);border-radius:var(--radius-sm);white-space:nowrap;flex-shrink:0}.plan-start-btn:hover{border-color:var(--accent);color:var(--accent)}.write-stage{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:55vh;gap:24px}.write-prompt-card{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--radius-lg);padding:22px 26px}.write-prompt-label{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);margin-bottom:10px}.write-prompt-text{font-size:17px;line-height:1.6;color:var(--text)}.write-vocab-hint{background:var(--bg-elev-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:4px 10px;font-size:13px;color:var(--easy);font-family:Noto Sans SC,system-ui,sans-serif}.write-textarea{width:100%;font:inherit;font-size:16px;line-height:1.7;color:var(--text);background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;resize:vertical;outline:none;transition:border-color .12s;font-family:Noto Sans SC,system-ui,sans-serif}.write-textarea:focus{border-color:#4a4a5e}.write-comment-card{background:var(--bg-elev-1);border:1px solid var(--border);border-left:3px solid var(--good);border-radius:var(--radius);padding:16px 20px}.write-compare{display:grid;grid-template-columns:1fr 1fr;gap:14px}.write-panel{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px}.write-panel-label{font-size:11px;text-transform:uppercase;letter-spacing:.08em;margin-bottom:10px}.write-panel-label--original{color:var(--text-faint)}.write-panel-label--corrected{color:var(--good)}.write-panel-text{font-size:15px;line-height:1.7;white-space:pre-wrap;font-family:Noto Sans SC,system-ui,sans-serif}.write-section{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px}.write-section-title{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);margin-bottom:12px}.write-error-row{display:flex;align-items:flex-start;gap:12px;padding:10px 0;border-bottom:1px solid var(--border)}.write-error-row:last-child{border-bottom:none}.write-error-badge{font-size:11px;font-weight:600;padding:3px 8px;border-radius:4px;white-space:nowrap;margin-top:2px}.write-error-badge--error{background:#3a1515;color:var(--again)}.write-error-badge--style{background:#2d2810;color:var(--hard)}.write-error-original{color:var(--again);text-decoration:line-through;font-size:14px}.write-error-corrected{color:var(--good);font-size:14px;font-weight:500}.write-alt-row{font-size:14px;color:var(--text-dim);padding:6px 0;border-bottom:1px solid var(--border);line-height:1.5}.write-alt-row:last-child{border-bottom:none}.dialogue-list{display:flex;flex-direction:column;gap:2px}.dialogue-line{display:flex;align-items:flex-start;gap:14px;padding:14px 18px;border-radius:var(--radius-sm);border:1px solid transparent;transition:background .12s,border-color .12s}.dialogue-line--active{background:var(--bg-elev-2);border-color:var(--accent)}.dialogue-line--a{background:var(--bg-elev-1)}.dialogue-line--b{background:var(--bg)}.dialogue-speaker{width:28px;height:28px;border-radius:50%;background:var(--bg-elev-2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:var(--text-dim);flex-shrink:0;margin-top:2px}.dialogue-line--a .dialogue-speaker{border-color:var(--es);color:var(--es)}.dialogue-line--b .dialogue-speaker{border-color:var(--easy);color:var(--easy)}.dialogue-content{flex:1}.dialogue-pinyin{font-size:12px;color:var(--text-faint);margin-bottom:3px}.dialogue-text{font-size:16px;line-height:1.5;font-family:Noto Sans SC,system-ui,sans-serif}.dialogue-translation{font-size:13px;color:var(--text-dim);margin-top:4px;font-style:italic}.dialogue-play-btn{background:none;border:none;color:var(--text-faint);font-size:14px;padding:4px 8px;cursor:pointer;opacity:.5;transition:opacity .12s;flex-shrink:0}.dialogue-play-btn:hover:not(:disabled){opacity:1}.listen-tip{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 16px;font-size:13px;color:var(--text-dim);line-height:1.5}.bar-chart{display:flex;align-items:flex-end;gap:6px;height:140px;padding-bottom:24px;position:relative}.bar-col{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:4px;height:100%}.bar-val{font-size:10px;color:var(--text-faint);line-height:1}.bar-fill{width:100%;background:linear-gradient(180deg,var(--accent) 0%,#ff4500 100%);border-radius:3px 3px 0 0;min-height:3px;transition:height .4s ease-out}.bar-label{position:absolute;bottom:0;font-size:9px;color:var(--text-faint)}.card-audio-btn{align-self:center;background:none;border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-faint);font-size:18px;padding:6px 14px;cursor:pointer;transition:border-color .12s,color .12s;margin-top:4px}.card-audio-btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.undo-toast{border-color:var(--hard);box-shadow:0 8px 28px #fbbf2433;padding:8px 10px}.undo-btn{background:none;border:none;color:var(--hard);font-weight:600;padding:6px 14px;font-size:14px;cursor:pointer}.undo-btn:hover{background:#fbbf241a;border-radius:var(--radius-sm)}.nav-divider{width:1px;height:18px;background:var(--border);margin:0 4px;align-self:center}.onboarding-key-section{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px}.onboarding-key-title{font-size:15px;font-weight:600;margin-bottom:6px}.onboarding-key-desc{font-size:13px;color:var(--text-dim);line-height:1.5}.card-browser-list{display:flex;flex-direction:column;gap:4px}.card-browser-row{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;transition:border-color .1s}.card-browser-row:hover{border-color:#3a3a4a}.card-browser-row--suspended{opacity:.45}.card-browser-front{font-weight:600;min-width:0;flex:1.5;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:Noto Sans SC,system-ui,sans-serif}.card-browser-pinyin{color:var(--text-faint);font-size:12px;flex:.8;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.card-browser-back{color:var(--text-dim);flex:2;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.card-browser-state{font-size:11px;font-weight:600;padding:3px 8px;border-radius:4px;white-space:nowrap;flex-shrink:0}.card-browser-state--new{background:#12243a;color:var(--easy)}.card-browser-state--learning{background:#2d2810;color:var(--hard)}.card-browser-state--review{background:#122a1e;color:var(--good)}.card-browser-state--suspended{background:var(--bg-elev-2);color:var(--text-faint)}.card-browser-actions{display:flex;gap:4px;flex-shrink:0}.history-tile{margin:0}.history-header{display:flex;align-items:center;gap:14px}.history-prompt{font-size:14px;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.history-badge{font-size:11px;font-weight:600;padding:2px 8px;border-radius:4px;white-space:nowrap}.history-badge--error{background:#3a1515;color:var(--again)}.history-badge--style{background:#2d2810;color:var(--hard)}.history-badge--clean{background:#122a1e;color:var(--good)}.modal-backdrop{position:fixed;inset:0;background:#000000a6;display:flex;align-items:center;justify-content:center;z-index:200;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.modal{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px 32px;min-width:360px;max-width:520px;width:90%;box-shadow:0 24px 60px #0009;animation:modal-in .18s ease-out}@keyframes modal-in{0%{transform:translateY(16px) scale(.97);opacity:0}to{transform:none;opacity:1}}.progress{height:6px;background:var(--bg-elev-2);border-radius:3px;overflow:hidden}.progress .fill{height:100%;background:linear-gradient(90deg,var(--accent),#ffb085);border-radius:3px;transition:width .3s}.lr-shell{min-height:100%;display:flex;flex-direction:column}.lr-topbar{display:flex;align-items:center;gap:14px;padding:16px 28px;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--bg-elev-1) 75%,transparent);position:sticky;top:0;z-index:20;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.lr-brand{display:flex;align-items:center;gap:9px;font-family:var(--font-display);font-weight:600;font-size:17px;letter-spacing:-.02em}.lr-brand .mark{width:26px;height:26px;display:grid;place-items:center;border-radius:8px;background:var(--accent-soft);color:var(--accent)}.lr-topbar nav{display:flex;gap:2px;margin-left:auto}.lr-navlink{display:flex;align-items:center;gap:7px;padding:8px 14px;border-radius:var(--r-pill);color:var(--text-dim);font-family:var(--font-body);font-size:14px;font-weight:500;background:transparent;border:none;cursor:pointer;transition:color var(--dur-1) var(--ease),background var(--dur-1) var(--ease)}.lr-navlink:hover{color:var(--text);background:var(--bg-elev-2)}.lr-navlink.active{color:var(--accent);background:var(--accent-soft)}.lr-navlink svg{width:16px;height:16px}.lr-tabbar{display:none;border-top:1px solid var(--border);background:color-mix(in srgb,var(--bg-elev-1) 92%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);position:sticky;bottom:0;z-index:20}.lr-tab{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 0 max(6px,env(safe-area-inset-bottom));color:var(--text-faint);font-family:var(--font-body);font-size:10.5px;font-weight:500;letter-spacing:.02em;background:transparent;border:none;cursor:pointer}.lr-tab svg{width:21px;height:21px}.lr-tab.active{color:var(--accent)}.lr-page{flex:1 1 auto;width:100%;max-width:1000px;margin:0 auto;padding:32px 40px;display:flex;flex-direction:column;gap:16px}.lr-h1{font-family:var(--font-display);font-weight:600;font-size:26px;letter-spacing:-.02em;margin:0}.lr-h2{font-family:var(--font-display);font-weight:600;font-size:19px;letter-spacing:-.01em;margin:0}.lr-eyebrow{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-faint)}.lr-section-title{display:flex;align-items:center;font-family:var(--font-display);font-weight:600;font-size:16px}.lr-card{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--r-lg);padding:20px}.lr-card.flush{padding:0;overflow:hidden}.lr-streak{display:flex;align-items:center;gap:18px;position:relative}.lr-flame{width:58px;height:58px;flex:0 0 58px;display:grid;place-items:center;color:var(--accent);filter:drop-shadow(0 0 16px var(--accent-glow))}.lr-flame svg{width:100%;height:100%}.lr-streak-num{font-family:var(--font-display);font-weight:700;font-size:60px;line-height:.9;letter-spacing:-.04em;font-variant-numeric:tabular-nums;background:linear-gradient(170deg,#fff 0%,var(--accent) 95%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.lr-streak-label{color:var(--text-dim);font-size:14px;margin-top:4px}.lr-streak-best{margin-top:8px;display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:11px;color:var(--text-faint)}.lr-streak-ring{margin-left:auto;display:flex;flex-direction:column;align-items:center;gap:6px}.lr-streak-ring .cd-label{font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;color:var(--text-faint)}.lr-week{display:flex;gap:7px;margin-top:4px}.lr-week i{width:9px;height:9px;border-radius:50%;background:var(--bg-elev-3);display:block}.lr-week i.on{background:var(--accent);box-shadow:0 0 8px var(--accent-glow)}.lr-week i.today{box-shadow:0 0 0 2px var(--bg-elev-1),0 0 0 3px var(--accent-line)}.lr-stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.lr-stat{background:var(--bg-elev-2);border-radius:var(--r-md);padding:15px 16px;display:flex;flex-direction:column;gap:3px}.lr-stat .v{font-family:var(--font-display);font-weight:700;font-size:27px;line-height:1;letter-spacing:-.02em;font-variant-numeric:tabular-nums}.lr-stat .v small{font-size:16px;color:var(--text-faint);font-weight:500}.lr-stat .l{color:var(--text-dim);font-size:12.5px}.lr-btn{font-family:var(--font-body);font-size:15px;font-weight:600;color:var(--text);background:var(--bg-elev-2);border:1px solid var(--border);border-radius:var(--r-md);padding:11px 18px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:background var(--dur-1) var(--ease),border-color var(--dur-1) var(--ease),transform var(--dur-1) var(--ease)}.lr-btn:hover{background:var(--bg-elev-3);border-color:var(--border-strong)}.lr-btn:active{transform:translateY(1px)}.lr-btn:disabled{opacity:.5;cursor:not-allowed}.lr-btn svg{width:16px;height:16px}.lr-btn.ghost{background:transparent;border-color:transparent;color:var(--text-dim)}.lr-btn.ghost:hover{background:var(--bg-elev-2);color:var(--text)}.lr-btn.small{padding:8px 13px;font-size:13px;border-radius:var(--r-sm)}.lr-btn.primary{background:var(--accent);color:var(--accent-ink);border:none;box-shadow:0 6px 18px -6px var(--accent-glow)}.lr-btn.primary:hover{background:var(--accent-hover)}.lr-btn.primary:active{background:var(--accent-press)}.lr-btn.block{width:100%}.lr-btn.lg{padding:15px 22px;font-size:16px;border-radius:var(--r-md)}.lr-chip{font-family:var(--font-body);font-size:13px;font-weight:500;padding:8px 14px;border-radius:var(--r-pill);background:var(--bg-elev-2);border:1px solid var(--border);color:var(--text-dim);cursor:pointer;transition:all var(--dur-1) var(--ease)}.lr-chip.sel{background:var(--accent-soft);border-color:var(--accent-line);color:var(--accent)}.lr-list{display:flex;flex-direction:column;gap:8px}.lr-row{display:flex;align-items:center;gap:13px;padding:13px 15px;background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--r-md);transition:border-color var(--dur-1) var(--ease),transform var(--dur-1) var(--ease)}.lr-row:hover{border-color:var(--border-strong)}.lr-row .row-icon{width:38px;height:38px;flex:0 0 38px;border-radius:11px;display:grid;place-items:center;background:var(--bg-elev-2);color:var(--text-dim)}.lr-row .row-icon svg{width:19px;height:19px}.lr-row .row-main{flex:1 1 auto;min-width:0}.lr-row .row-title{font-weight:600;font-size:15px;letter-spacing:-.005em}.lr-row .row-sub{color:var(--text-dim);font-size:12.5px;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lr-row.dim{opacity:.55}.lr-row.done .row-icon{background:var(--good-soft);color:var(--good)}.lr-row.locked .row-icon{color:var(--text-faint)}.lr-row.sub{margin-left:26px;background:transparent;border-style:dashed}.lr-row .row-mins{font-family:var(--font-mono);font-size:11px;color:var(--text-faint);white-space:nowrap}.lr-mastery{display:flex;flex-direction:column;align-items:center;gap:2px}.lr-mastery .m-num{font-family:var(--font-display);font-weight:700;font-size:17px;line-height:1;font-variant-numeric:tabular-nums}.lr-mastery .m-cap{font-family:var(--font-mono);font-size:8.5px;letter-spacing:.1em;color:var(--text-faint)}.lr-ring{position:relative;width:40px;height:40px;flex:0 0 40px}.lr-ring .rnum{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--font-display);font-weight:700;font-size:13px;font-variant-numeric:tabular-nums}.lr-progress{height:6px;background:var(--bg-elev-2);border-radius:var(--r-pill);overflow:hidden}.lr-progress .fill{height:100%;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--accent-press),var(--accent));box-shadow:0 0 12px -2px var(--accent-glow);transition:width var(--dur-3) var(--ease)}.lr-stepdots{display:flex;gap:6px;justify-content:center}.lr-stepdots i{width:6px;height:6px;border-radius:50%;background:var(--bg-elev-3)}.lr-stepdots i.on{background:var(--accent);width:18px;border-radius:var(--r-pill)}.lr-deck{position:relative}.lr-deck .peek{position:absolute;left:14px;right:14px;height:36px;border-radius:var(--r-lg);background:var(--bg-elev-1);border:1px solid var(--border)}.lr-deck .peek.p1{top:-8px;left:22px;right:22px;opacity:.55}.lr-deck .peek.p2{top:-15px;left:32px;right:32px;opacity:.28}.lr-infocard{position:relative;background:var(--bg-elev-1);border:1px solid var(--border-strong);border-radius:var(--r-lg);padding:22px 22px 24px;box-shadow:var(--shadow-card)}.lr-infocard .ic-kicker{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}.lr-infocard .ic-count{position:absolute;top:20px;right:22px;font-family:var(--font-mono);font-size:12px;color:var(--text-faint);font-variant-numeric:tabular-nums}.lr-md{font-size:16px;line-height:1.65;color:var(--text)}.lr-md>:first-child{margin-top:0}.lr-md>:last-child{margin-bottom:0}.lr-md h1,.lr-md h2,.lr-md h3{font-family:var(--font-display);font-weight:600;letter-spacing:-.01em;line-height:1.25;margin:16px 0 8px}.lr-md h1{font-size:21px}.lr-md h2{font-size:18px}.lr-md h3{font-size:16px}.lr-md p{margin:10px 0}.lr-md ul,.lr-md ol{margin:10px 0;padding-left:20px}.lr-md li{margin:5px 0}.lr-md li::marker{color:var(--accent)}.lr-md strong{font-weight:700;color:#fff}.lr-md a{color:var(--accent);text-decoration:none;border-bottom:1px solid var(--accent-line)}.lr-md code{font-family:var(--font-mono);font-size:.86em;background:var(--bg-elev-2);border:1px solid var(--border);padding:1px 6px;border-radius:6px;color:var(--accent-hover)}.lr-md pre{background:var(--bg-elev-2);border:1px solid var(--border);border-radius:var(--r-md);padding:14px 16px;margin:12px 0;overflow-x:auto}.lr-md pre code{background:none;border:none;padding:0;color:var(--text)}.lr-md blockquote{border-left:2px solid var(--accent-line);margin:12px 0;padding:2px 0 2px 14px;color:var(--text-dim)}.lr-mcq-q{font-weight:600;font-size:15.5px;margin-bottom:12px;line-height:1.4}.lr-opt{display:flex;align-items:center;gap:12px;width:100%;text-align:left;padding:13px 15px;margin-top:9px;background:var(--bg-elev-2);border:1px solid var(--border);border-radius:var(--r-md);color:var(--text);font-size:14.5px;font-family:var(--font-body);cursor:pointer;transition:all var(--dur-1) var(--ease)}.lr-opt:hover{border-color:var(--border-strong)}.lr-opt .opt-key{width:24px;height:24px;flex:0 0 24px;border-radius:7px;display:grid;place-items:center;font-family:var(--font-mono);font-size:12px;font-weight:600;background:var(--bg-elev-3);color:var(--text-dim);border:1px solid var(--border)}.lr-opt .opt-mark{margin-left:auto;display:grid;place-items:center}.lr-opt.sel{border-color:var(--accent-line);background:var(--accent-soft)}.lr-opt.sel .opt-key{background:var(--accent);color:var(--accent-ink);border-color:transparent}.lr-opt.correct{border-color:var(--good);background:var(--good-soft)}.lr-opt.correct .opt-key{background:var(--good);color:#06210f;border-color:transparent}.lr-opt.correct .opt-mark{color:var(--good)}.lr-opt.wrong{border-color:var(--again);background:var(--again-soft)}.lr-opt.wrong .opt-key{background:var(--again);color:#2a0b07;border-color:transparent}.lr-opt.wrong .opt-mark{color:var(--again)}.lr-flash{background:var(--bg-elev-1);border:1px solid var(--border-strong);border-radius:var(--r-xl);padding:36px 28px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:16px;box-shadow:var(--shadow-card);position:relative}.lr-flash .fc-tag{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-faint)}.lr-flash .fc-front{font-family:var(--font-display);font-weight:600;font-size:28px;letter-spacing:-.02em;line-height:1.2}.lr-flash .fc-divider{width:40px;height:1px;background:var(--border-strong)}.lr-flash .fc-back{font-size:17px;color:var(--text-dim);line-height:1.55;max-width:32ch}.lr-flash .fc-hint{font-family:var(--font-mono);font-size:11px;color:var(--text-faint)}.lr-rating{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;width:100%}.lr-rate{display:flex;flex-direction:column;align-items:center;gap:3px;padding:13px 6px 11px;border-radius:var(--r-md);border:1px solid;background:var(--bg-elev-1);cursor:pointer;font-family:var(--font-body);transition:transform var(--dur-1) var(--ease),background var(--dur-1) var(--ease),box-shadow var(--dur-1) var(--ease)}.lr-rate:hover{transform:translateY(-2px)}.lr-rate .rt-label{font-weight:700;font-size:14px}.lr-rate .rt-when{font-family:var(--font-mono);font-size:10px;color:var(--text-faint)}.lr-rate.again{border-color:color-mix(in srgb,var(--r-again) 45%,transparent);background:var(--r-again-soft)}.lr-rate.again .rt-label{color:var(--r-again)}.lr-rate.again:hover{box-shadow:0 8px 20px -10px var(--r-again)}.lr-rate.hard{border-color:color-mix(in srgb,var(--r-hard) 45%,transparent);background:var(--r-hard-soft)}.lr-rate.hard .rt-label{color:var(--r-hard)}.lr-rate.hard:hover{box-shadow:0 8px 20px -10px var(--r-hard)}.lr-rate.good{border-color:color-mix(in srgb,var(--r-good) 45%,transparent);background:var(--r-good-soft)}.lr-rate.good .rt-label{color:var(--r-good)}.lr-rate.good:hover{box-shadow:0 8px 20px -10px var(--r-good)}.lr-rate.easy{border-color:color-mix(in srgb,var(--r-easy) 45%,transparent);background:var(--r-easy-soft)}.lr-rate.easy .rt-label{color:var(--r-easy)}.lr-rate.easy:hover{box-shadow:0 8px 20px -10px var(--r-easy)}.lr-sessionbar{display:flex;align-items:center;gap:14px;padding:12px 18px;border-bottom:1px solid var(--border);background:var(--bg-elev-1)}.lr-sessionbar .sb-count{font-family:var(--font-mono);font-size:12px;color:var(--text-dim);white-space:nowrap}.lr-field{display:flex;flex-direction:column;gap:7px}.lr-field label{font-size:13px;color:var(--text-dim);font-weight:500}.lr-input{font-family:var(--font-body);font-size:14px;color:var(--text);background:var(--bg-elev-2);border:1px solid var(--border);border-radius:var(--r-md);padding:12px 14px;outline:none;width:100%;transition:border-color var(--dur-1) var(--ease),box-shadow var(--dur-1) var(--ease)}.lr-input::placeholder{color:var(--text-faint)}.lr-input:focus{border-color:var(--accent-line);box-shadow:0 0 0 3px var(--accent-soft)}.lr-input.mono{font-family:var(--font-mono);font-size:13px}.lr-settings-group{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:var(--r-lg);padding:18px;display:flex;flex-direction:column;gap:14px}.lr-settings-group .sg-title{display:flex;align-items:center;gap:9px;font-family:var(--font-display);font-weight:600;font-size:15px}.lr-settings-group .sg-title .ico{color:var(--text-dim);display:grid;place-items:center}.lr-help{font-size:12px;color:var(--text-faint);line-height:1.45}.lr-badge{font-family:var(--font-mono);font-size:10px;letter-spacing:.04em;font-weight:600;padding:3px 8px;border-radius:var(--r-pill);display:inline-flex;align-items:center;gap:5px;text-transform:uppercase}.lr-badge.accent{background:var(--accent-soft);color:var(--accent)}.lr-badge.good{background:var(--good-soft);color:var(--good)}.lr-badge.muted{background:var(--bg-elev-2);color:var(--text-faint)}.lr-badge.dot:before{content:"";width:5px;height:5px;border-radius:50%;background:currentColor}.lr-callout{display:flex;gap:10px;padding:11px 13px;border-radius:var(--r-md);background:var(--accent-soft);border:1px solid var(--accent-line);font-size:13px;line-height:1.45;color:var(--text)}.lr-callout .co-ico{color:var(--accent);flex:0 0 auto;margin-top:1px}.lr-toast{display:flex;align-items:center;gap:11px;padding:13px 16px;border-radius:var(--r-md);background:var(--bg-elev-3);border:1px solid var(--border-strong);box-shadow:var(--shadow-lg);font-size:14px;font-weight:500}.lr-toast .t-ico{display:grid;place-items:center;flex:0 0 auto}.lr-toast.success{border-color:color-mix(in srgb,var(--good) 40%,var(--border))}.lr-toast.success .t-ico{color:var(--good)}.lr-toast.undo .t-ico{color:var(--r-hard)}.lr-toast .t-action{margin-left:auto;color:var(--accent);font-weight:600;cursor:pointer}.lr-inline-error{display:flex;align-items:center;gap:9px;padding:11px 13px;border-radius:var(--r-md);background:var(--again-soft);border:1px solid color-mix(in srgb,var(--again) 40%,transparent);color:var(--again);font-size:13px}.lr-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:14px;padding:40px 24px;color:var(--text-dim)}.lr-empty .e-ico{width:64px;height:64px;border-radius:var(--r-lg);display:grid;place-items:center;background:var(--bg-elev-2);color:var(--text-faint)}.lr-empty .e-title{font-family:var(--font-display);font-weight:600;font-size:18px;color:var(--text)}.lr-empty .e-sub{font-size:14px;max-width:30ch;line-height:1.5}.lr-skel{background:linear-gradient(100deg,var(--bg-elev-2) 30%,var(--bg-elev-3) 50%,var(--bg-elev-2) 70%);background-size:200% 100%;animation:lr-shimmer 1.4s infinite linear;border-radius:var(--r-md)}@keyframes lr-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.lr-spinner{width:30px;height:30px;border-radius:50%;border:3px solid var(--bg-elev-3);border-top-color:var(--accent);animation:lr-spin .8s linear infinite}@keyframes lr-spin{to{transform:rotate(360deg)}}.lr-center{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;padding:24px 18px}.lr-done-badge{width:76px;height:76px;border-radius:50%;display:grid;place-items:center;background:var(--good-soft);color:var(--good);box-shadow:0 0 0 8px color-mix(in srgb,var(--good) 8%,transparent)}.lr-takeaway{display:flex;gap:11px;align-items:flex-start;padding:11px 0;border-bottom:1px solid var(--border);font-size:14.5px;line-height:1.45}.lr-takeaway:last-child{border-bottom:none}.lr-takeaway .tk-dot{color:var(--accent);margin-top:2px;flex:0 0 auto}.lr-pop{animation:lr-pop .5s var(--ease-spring) both}@keyframes lr-pop{0%{transform:scale(.4);opacity:0}60%{transform:scale(1.08)}to{transform:scale(1);opacity:1}}.lr-row-between{display:flex;align-items:center;justify-content:space-between;gap:12px}.lr-grow{flex:1 1 auto}.lr-muted{color:var(--text-dim)}.lr-faint{color:var(--text-faint)}.lr-mono{font-family:var(--font-mono)}.lr-gap-sm{display:flex;flex-direction:column;gap:8px}.lr-grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}@media(max-width:720px){.lr-page{padding:18px 16px 22px;gap:13px}.lr-topbar nav{display:none}.lr-tabbar{display:flex}.lr-rating{gap:6px}.lr-grid-2{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){.lr-pop{animation:none}*,*:before,*:after{transition-duration:.01ms!important}}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2) format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff) format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff) format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff) format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2) format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff) format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2) format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff) format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2) format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff) format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2) format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff) format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2) format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff) format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2) format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff) format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff) format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff) format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff) format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2) format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff) format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2) format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff) format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2) format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff) format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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) format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff) format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2) format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff) format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2) format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff) format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf) format("truetype")}.katex{font: 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;position:relative;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.17.0"}.katex .katex-mathml{border:0;-webkit-clip-path:inset(50%);clip-path:inset(50%);height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .smash{display:inline;line-height:0}.katex .clap,.katex .llap,.katex .rlap{position:relative;width:0}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.6666666667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{display:inline-block;width:.12em}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{display:inline-block;min-width:1px}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{border:.04em solid;box-sizing:border-box}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}