@import "https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.css";.lx{--lx-max:1200px;--lx-gutter:clamp(16px, 4vw, 56px);--lx-mono:ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;background:var(--surface-page);color:var(--text-primary)}.app:not(.app-welcome) .lx-header{display:none}.lx-header{max-width:var(--lx-max);padding:16px var(--lx-gutter);justify-content:space-between;align-items:center;gap:12px;margin:0 auto;display:flex}.lx-brand{min-height:44px;color:var(--text-strong);align-items:center;gap:9px;display:inline-flex}.lx-brand .brand-symbol i{width:6px;height:19px}.lx-brand .brand-symbol i:nth-child(2){height:13px;margin-top:6px}.lx-brand .brand-symbol i:nth-child(3){height:16px;margin-top:3px}.lx-brand-text{letter-spacing:-1px;color:var(--text-strong);font-size:21px;font-weight:750}.lx-nav{align-items:center;gap:4px;display:flex}.lx-nav-link{white-space:nowrap;min-height:40px;color:var(--text-secondary);border-radius:6px;padding:0 12px;font-size:13.5px}.lx-nav-link:hover{background:var(--surface-hover);color:var(--text-strong)}.lx-nav .theme-toggle{margin:0 6px}.lx-nav-login{white-space:nowrap;border:1px solid var(--border-strong);min-height:40px;color:var(--text-strong);background:var(--surface-card);border-radius:6px;padding:0 16px;font-size:13px;font-weight:600}.lx-nav-login:hover{border-color:var(--accent-line);color:var(--accent-text-strong)}.lx-hero{max-width:var(--lx-max);padding:clamp(24px, 5vw, 64px) var(--lx-gutter) clamp(56px, 7vw, 104px);grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:clamp(32px,5vw,72px);margin:0 auto;display:grid}.lx-eyebrow{color:var(--accent-text);margin:0;font-size:13px;font-weight:650}.lx-hero-title{letter-spacing:-.04em;color:var(--text-strong);word-break:keep-all;margin:16px 0 0;font-size:clamp(34px,4.4vw,58px);font-weight:750;line-height:1.16}.lx-hero-lead{max-width:34em;color:var(--text-secondary);word-break:keep-all;margin:24px 0 0;font-size:16px;line-height:1.85}.lx-hero-actions{flex-wrap:wrap;gap:10px;margin-top:32px;display:flex}.lx-hero-actions .primary{gap:10px;min-height:48px;font-size:14px}.lx-hero-actions .secondary{min-height:48px;padding:0 18px;font-size:13.5px}.lx-hero-stage{min-width:0}.lx-stage-frame{width:100%;max-width:480px;height:calc(370px * var(--h-scale,1));margin:0 auto;position:relative;overflow:clip visible}.lx-stage-canvas{transform-origin:50% 0;width:400px;height:440px;transform:translateX(-50%) scale(var(--h-scale,1)) translateY(-30px);pointer-events:none;-webkit-user-select:none;user-select:none;letter-spacing:-.01em;color:var(--text-primary);font-size:12px;line-height:1.5;position:absolute;top:0;left:50%}.lx-abs{position:absolute}.lx-box{width:calc((var(--h-er) - var(--h-el)) * 1px);height:calc((var(--h-eb) - var(--h-et)) * 1px);transform:translate(calc(var(--h-el) * 1px), calc(var(--h-et) * 1px)) scale(calc(1 + var(--h-bp) * .007));border:1px solid color-mix(in srgb, color-mix(in srgb, var(--border-strong), var(--accent-line) calc(var(--h-ta) * 60%)), transparent calc(var(--h-td) * 100%));border-radius:calc(var(--h-rad) * 1px);background:var(--surface-card);background:color-mix(in srgb, color-mix(in srgb, var(--surface-card), var(--accent-soft) calc(var(--h-ta) * 100%)), var(--warm-soft) calc(var(--h-tw) * 100%));box-shadow:0 1px 2px var(--shadow-soft), 0 calc(20px + var(--h-lift) * 10px) calc(40px + var(--h-lift) * 18px) -28px var(--shadow-accent-strong);position:absolute;top:0;left:0;overflow:hidden}.lx-box:before{content:"";z-index:1;border:1.5px dashed var(--border-accent-strong);border-radius:inherit;opacity:var(--h-td);pointer-events:none;position:absolute;inset:0}.lx-layer,.lx-phase{--off:max(1 - var(--v), var(--v) - 1);opacity:calc(1 - var(--off));filter:blur(calc(var(--off) * 4px))}.lx-phase{transform:translateY(calc((1 - var(--v)) * 6px))}.lx-layer{filter:blur(calc(var(--off) * 6px));transform:translate(-50%, -50%) translateY(calc((1 - var(--v)) * 10px)) scale(calc(1 - var(--off) * .015));position:absolute;top:50%;left:50%}.lx-row-head{color:var(--text-muted);white-space:nowrap;justify-content:space-between;align-items:center;gap:8px;font-size:11px;display:flex}.lx-row-head strong{color:var(--text-strong);font-size:13px;font-weight:650}.lx-tag{background:var(--accent-soft);height:20px;color:var(--accent-text);border-radius:10px;align-items:center;padding:0 8px;font-size:10.5px;font-weight:650;display:inline-flex}.lx-tag-warm{background:var(--warm-soft);color:var(--warm-text)}.lx-page-tag{font-family:var(--lx-mono);letter-spacing:0;color:var(--accent-text);font-size:10.5px;font-weight:600}.lx-stem{color:var(--text-strong);word-break:keep-all;margin:0;font-size:14px;font-weight:650;line-height:1.55}.lx-foot-note{color:var(--accent-text);align-items:center;gap:5px;font-size:11.5px;font-weight:600;display:flex}.lx-foot-ask{color:var(--text-secondary)}.lx-action{transform:scale(calc(1 - var(--tap) * .05));border-radius:8px;justify-content:center;align-items:center;gap:5px;font-size:12.5px;font-weight:650;display:flex}.lx-center{flex-direction:column;justify-content:center;align-items:center;gap:2px;display:flex;position:absolute;inset:0}.lx-upload-main{color:var(--text-strong);align-items:center;gap:6px;font-size:14px;font-weight:650;display:inline-flex}.lx-upload-main svg{color:var(--accent-text)}.lx-upload-sub{color:var(--text-muted);font-size:11px}.lx-file{z-index:2;border:1px solid var(--border-strong);background:var(--surface-card);height:36px;color:var(--text-strong);white-space:nowrap;--off:max(1 - var(--v), var(--v) - 1);opacity:calc(1 - var(--off));filter:blur(calc(var(--off) * 3px));transform-origin:128px 20px;transform:translate(calc((var(--h-cx) - 128) * 1px), calc((var(--h-cy) - 20) * 1px)) scale(var(--h-fs));box-shadow:0 10px 24px -14px var(--shadow-accent-strong);border-radius:8px;align-items:center;gap:6px;padding:0 12px;font-size:12px;font-weight:600;display:inline-flex;position:absolute;top:0;left:0}.lx-file svg{color:var(--accent-text)}.lx-file em{color:var(--text-muted);font-style:normal;font-weight:500}.lx-doc-head{color:var(--text-muted);justify-content:space-between;align-items:baseline;font-size:11px;display:flex}.lx-doc-head strong{color:var(--text-strong);font-size:12.5px;font-weight:650}.lx-rule{background:var(--border-default);height:1px}.lx-doc-text{color:var(--text-body);word-break:keep-all;margin:0;font-size:12px;line-height:1.75}.lx-reveal{clip-path:inset(0 0 calc((1 - var(--reveal)) * 100%) 0)}.lx-scan{background:var(--accent-line);height:1px;opacity:calc(var(--reveal) * (1 - var(--reveal)) * 3.2);transform:translateY(calc(var(--reveal) * 86px))}.lx-term{color:inherit;text-underline-offset:3px;text-decoration-line:underline;text-decoration-thickness:1.5px;-webkit-text-decoration-color:color-mix(in srgb, var(--accent-line) calc(var(--h-rm) * 100%), transparent);text-decoration-color:color-mix(in srgb, var(--accent-line) calc(var(--h-rm) * 100%), transparent);background:0 0}.lx-doc-foot{color:var(--accent-text);align-items:center;gap:5px;font-size:11.5px;font-weight:600;display:flex}.lx-chip{--show:clamp(0, calc(var(--h-c3) * 2.2 - var(--i) * .35), 1);border:1px solid var(--border-strong);color:var(--text-strong);opacity:var(--show);filter:blur(calc((1 - var(--show)) * 3px));transform:translateY(calc((1 - var(--show)) * 8px));border-radius:17px;justify-content:center;align-items:center;font-size:13px;font-weight:600;display:flex}.lx-chip-pick{transform:translateY(calc((1 - var(--show)) * 8px)) scale(calc(1 - var(--h-tc) * .06));border-color:color-mix(in srgb, var(--border-strong), var(--accent) calc(var(--h-cs) * 100%));background:color-mix(in srgb, var(--surface-card), var(--accent) calc(var(--h-cs) * 100%));color:color-mix(in srgb, var(--text-strong), var(--accent-contrast) calc(var(--h-cs) * 100%))}.lx-scope{color:var(--text-secondary);font-size:11.5px;font-weight:600}.lx-action-make{--tap:var(--h-tm);border:1px solid color-mix(in srgb, var(--border-default), var(--accent) calc(var(--h-cs) * 100%));background:color-mix(in srgb, color-mix(in srgb, var(--surface-inset), var(--accent) calc(var(--h-cs) * 100%)), var(--accent-pressed) calc(var(--h-cb) * 100%));color:color-mix(in srgb, var(--text-faint), var(--accent-contrast) calc(var(--h-cs) * 100%))}.lx-option{--show:clamp(0, calc(var(--h-qo) * 2.4 - var(--i) * .3), 1);border:1px solid var(--border-default);color:var(--text-primary);opacity:calc(var(--show) * (1 - var(--h-al) * .55 * var(--dim,0)));filter:blur(calc((1 - var(--show)) * 3px));transform:translateY(calc((1 - var(--show)) * 6px)) scale(calc(1 - var(--tap,0) * .025));border-radius:8px;align-items:center;gap:10px;padding:0 10px;font-size:13px;display:flex}.lx-option i{border:1px solid var(--border-strong);width:20px;height:20px;color:var(--text-secondary);border-radius:50%;place-items:center;font-size:10.5px;font-style:normal;font-weight:650;display:grid}.lx-option-rest{--dim:1}.lx-option-pick{--tap:var(--h-to);border-color:color-mix(in srgb, var(--border-default), var(--accent-line) calc(max(var(--h-ah) * .5, var(--h-as)) * 100%));background:color-mix(in srgb, var(--surface-card), var(--accent-soft) calc(var(--h-as) * 100%));font-weight:calc(400 + var(--h-as) * 250)}.lx-option-pick i{border-color:color-mix(in srgb, var(--border-strong), var(--accent) calc(var(--h-as) * 100%));background:color-mix(in srgb, transparent, var(--accent) calc(var(--h-as) * 100%));color:color-mix(in srgb, var(--text-secondary), var(--accent-contrast) calc(var(--h-as) * 100%))}.lx-conf-ask{color:var(--text-muted);font-size:11px;font-weight:600}.lx-conf-label{--d:calc(var(--h-kn) - var(--i));--off:min(1, max(var(--d), -1 * var(--d)) * 2);text-align:right;color:color-mix(in srgb, var(--text-strong), var(--accent-text) calc(var(--h-kd) * 100%));opacity:calc(1 - var(--off));filter:blur(calc(var(--off) * 4px));transform:translateX(calc(var(--d) * -16px));font-size:12.5px;font-weight:650}.lx-conf-track{background:var(--border-strong);border-radius:1px}.lx-conf-fill{background:var(--accent);transform-origin:0;transform:scaleX(calc(var(--h-kn) / 3));border-radius:1px}.lx-conf-stop{background:color-mix(in srgb, var(--border-strong), var(--accent) calc(clamp(0, (var(--h-kn) - var(--i) + .5) * 2, 1) * 100%));border-radius:50%;width:6px;height:6px}.lx-conf-num{text-align:center;color:color-mix(in srgb, var(--text-faint), var(--accent-text) calc(clamp(0, 1 - max(var(--h-kn) - var(--i), var(--i) - var(--h-kn)) * 2, 1) * 100%));font-size:10.5px;font-weight:650}.lx-conf-knob{border:2px solid var(--accent);background:color-mix(in srgb, var(--surface-card), var(--accent) calc(var(--h-kd) * 100%));transform:translateX(calc(var(--h-kn) * 75px)) scale(calc(1 + var(--h-kg) * .18));box-shadow:0 2px 6px var(--shadow-color);border-radius:50%}.lx-result{color:var(--warm-text);font-size:11.5px;font-weight:650}.lx-cell{border:1px solid var(--border-default);background:var(--surface-card);border-radius:10px;flex-direction:column;gap:6px;padding:10px;display:flex}.lx-cell-axis{color:var(--text-muted);font-size:10px}.lx-cell strong{color:var(--text-strong);word-break:keep-all;font-size:12.5px;font-weight:650;line-height:1.35}.lx-cell-miss{transform:scale(calc(1 - var(--h-tq) * .035));border-color:color-mix(in srgb, var(--border-default), var(--state-miss) calc(var(--h-gq) * 100%));background:color-mix(in srgb, var(--surface-card), var(--warm-soft) calc(var(--h-gq) * 100%))}.lx-cell-miss strong{color:color-mix(in srgb, var(--text-strong), var(--warm-text) calc(var(--h-gq) * 100%))}.lx-cell-flag{color:var(--warm-text);font-size:10.5px;font-weight:700;position:absolute;bottom:9px;right:10px}.lx-dot{border:2px solid var(--surface-card);background:var(--state-miss);width:12px;height:12px;opacity:clamp(0, var(--h-gr), 1);transform:translate(calc((144 + var(--h-gd) * 30) * 1px), calc((160 - var(--h-gd) * 20 - sin(var(--h-gd) * 180deg) * 16) * 1px)) scale(calc(1 + var(--h-gp) * .35));border-radius:50%;top:0;left:0}.lx-excerpt{border:1px solid var(--border-default);background:var(--surface-inset);border-radius:8px;padding:10px 12px}.lx-excerpt p{color:var(--text-body);word-break:keep-all;margin:4px 0 0;font-size:12px;line-height:1.7}.lx-evidence{color:inherit;background:color-mix(in srgb, transparent, var(--accent-soft) calc(var(--h-mh) * 100%));box-shadow:inset 0 -1.5px 0 color-mix(in srgb, transparent, var(--accent-line) calc(var(--h-mh) * 100%));padding:0 1px}.lx-field-label{color:var(--text-secondary);font-size:11px;font-weight:600}.lx-typed{border:1px solid var(--border-strong);background:var(--surface-card);border-radius:8px;flex-direction:column;gap:4px;padding:10px 12px;display:flex}.lx-type{color:var(--text-strong);white-space:pre;font-size:12.5px;line-height:1.6;display:block}.lx-type i{opacity:clamp(0, calc(var(--h-mt) * var(--n) - var(--c)), 1);font-style:normal}.lx-action-done{--tap:var(--h-tk);border:1px solid var(--accent-line);background:color-mix(in srgb, var(--surface-card), var(--accent) calc(var(--h-md) * 100%));color:color-mix(in srgb, var(--accent-text), var(--accent-contrast) calc(var(--h-md) * 100%))}.lx-flip{justify-items:end;display:inline-grid}.lx-flip>span{grid-area:1/1;font-size:11px;font-weight:650}.lx-state-miss{color:var(--warm-text)}.lx-state-ok{color:var(--accent-text)}.lx-mini{border:1px solid var(--border-default);color:var(--text-primary);border-radius:8px;place-items:center;font-size:12.5px;display:grid}.lx-mini-pick{transform:scale(calc(1 - var(--h-tz) * .06));border-color:color-mix(in srgb, var(--border-default), var(--accent) calc(var(--h-vs) * 100%));background:color-mix(in srgb, var(--surface-card), var(--accent-soft) calc(var(--h-vs) * 100%));font-weight:650}.lx-slot,.lx-slot-item,.lx-next-chip{--show:clamp(0, calc(var(--h-ni) * 2.2 - var(--i) * .35), 1);opacity:var(--show);filter:blur(calc((1 - var(--show)) * 3px))}.lx-slot{background:var(--surface-inset);border-radius:10px;padding:7px 10px}.lx-slot-today{background:color-mix(in srgb, var(--surface-inset), var(--accent-soft) calc(var(--h-nd) * 100%));box-shadow:inset 0 0 0 1px color-mix(in srgb, transparent, var(--accent-line) calc(var(--h-nd) * 100%))}.lx-slot-label{color:var(--text-muted);font-size:10.5px;font-weight:650}.lx-slot-item,.lx-next-chip{border:1px solid var(--border-default);background:var(--surface-card);color:var(--text-primary);border-radius:7px;place-items:center;font-size:11.5px;font-weight:600;display:grid}.lx-next-chip{border-color:var(--accent-line);color:var(--accent-text);transform:translate(calc(var(--h-nx) * 1px), calc((var(--h-ng) * -3 + (1 - var(--show)) * 6) * 1px)) scale(calc(1 + var(--h-ng) * .04));box-shadow:0 calc(var(--h-ng) * 10px) 18px -10px var(--shadow-accent-strong)}.lx-cursor{z-index:3;transform:translate(calc((var(--h-cx) - 2) * 1px), calc((var(--h-cy) - 1.5) * 1px));position:absolute;top:0;left:0}.lx-cursor svg{transform-origin:2px 1.5px;transform:scale(calc(1 - var(--h-cp) * .12));display:block}.lx-cursor path{fill:var(--text-strong);stroke:var(--surface-card);stroke-width:1.2px;stroke-linejoin:round}.lx-cursor-ring{border:1.5px solid var(--accent-line);width:28px;height:28px;opacity:calc(var(--h-rk) * .7);transform:scale(calc(1.25 - var(--h-rk) * .65));border-radius:50%;position:absolute;top:-12.5px;left:-12px}.lx-transport{justify-content:space-between;align-items:center;gap:12px;max-width:480px;margin:20px auto 0;display:flex}.lx-now{align-items:baseline;gap:10px;min-width:0;display:flex}.lx-now-index{font-family:var(--lx-mono);color:var(--accent-text);font-size:12px;font-weight:600}.lx-now-label{color:var(--text-strong);white-space:nowrap;font-size:15px;font-weight:650}.lx-now-beat{font-family:var(--lx-mono);color:var(--text-faint);font-variant-numeric:tabular-nums;font-size:11px}.lx-play{border:1px solid var(--border-strong);width:40px;height:40px;color:var(--text-secondary);background:var(--surface-card);border-radius:50%;flex:none;place-items:center;display:grid}.lx-play:hover{color:var(--accent-text);border-color:var(--accent-line)}.lx-ruler{cursor:pointer;touch-action:pan-y;border-radius:4px;grid-template-columns:repeat(10,minmax(0,1fr));gap:5px;max-width:480px;margin:10px auto 0;padding:10px 0;display:grid}.lx-ruler:focus-visible{outline-offset:2px}.lx-ruler-ticks{grid-template-columns:repeat(4,minmax(0,1fr));gap:2px;display:grid}.lx-ruler-ticks i{background:var(--border-strong);border-radius:1px;height:8px}.lx-ruler-ticks i.is-on{background:var(--accent-decoration)}.lx-ruler-group.is-current .lx-ruler-ticks i{height:14px;margin-top:-3px}.lx-ruler-group.is-current .lx-ruler-ticks i.is-on{background:var(--accent)}.lx-section{max-width:var(--lx-max);padding:clamp(56px, 8vw, 112px) var(--lx-gutter);border-top:1px solid var(--border-default);grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(28px,5vw,80px);margin:0 auto;display:grid}.lx-section-copy{min-width:0}.lx-index{font-family:var(--lx-mono);color:var(--accent-text);font-size:12px;font-weight:600}.lx-section h2{letter-spacing:-.035em;color:var(--text-strong);word-break:keep-all;margin:12px 0 0;font-size:clamp(26px,3vw,38px);font-weight:720;line-height:1.24}.lx-section-copy p{max-width:34em;color:var(--text-secondary);word-break:keep-all;margin:18px 0 0;font-size:15px;line-height:1.85}.lx-text-link{min-height:44px;color:var(--accent-text);align-items:center;gap:6px;margin-top:12px;font-size:13.5px;font-weight:600;display:inline-flex}.lx-text-link:hover{text-underline-offset:3px;text-decoration:underline}.lx-source{min-width:0;margin:0}.lx-source-page{border:1px solid var(--border-default);background:var(--surface-card);border-radius:4px;padding:24px 26px}.lx-source-tag{font-family:var(--lx-mono);color:var(--accent-text);font-size:11.5px;font-weight:600}.lx-source-page p{color:var(--text-body);word-break:keep-all;margin:12px 0 0;font-size:16px;line-height:1.95}.lx-source-page mark{color:var(--text-strong);background:var(--accent-soft);box-shadow:inset 0 -2px 0 var(--accent-line);padding:0 2px}.lx-source-link{border-right:1.5px solid var(--accent-line);border-bottom:1.5px solid var(--accent-line);width:10px;height:10px;margin:14px auto 12px;transform:rotate(45deg)}.lx-source-question{border:1px solid var(--border-default);background:var(--surface-card);border-radius:12px;padding:18px 20px}.lx-source-stem{color:var(--text-strong);word-break:keep-all;margin:0;font-size:17px;font-weight:650;line-height:1.6}.lx-source-answer{flex-wrap:wrap;gap:6px 16px;margin:10px 0 0;font-size:13.5px;line-height:1.7;display:flex}.lx-source-answer span:first-child{color:var(--accent-text);font-weight:650}.lx-source-cite{color:var(--text-muted);word-break:keep-all}.lx-matrix{border-top:1px solid var(--border-strong);min-width:0}.lx-matrix-row{border-bottom:1px solid var(--border-default);grid-template-columns:84px minmax(0,1fr) minmax(0,1fr);display:grid}.lx-matrix-head span{color:var(--text-muted);padding:12px 16px;font-size:12.5px;font-weight:650}.lx-matrix-head .lx-matrix-corner{padding:0}.lx-matrix-axis{color:var(--text-muted);padding:22px 12px 22px 0;font-size:12.5px;font-weight:650}.lx-matrix-cell{border-left:1px solid var(--border-default);flex-direction:column;gap:8px;padding:22px 16px;display:flex}.lx-matrix-cell strong{letter-spacing:-.02em;color:var(--text-strong);word-break:keep-all;align-items:center;gap:8px;font-size:17px;font-weight:700;display:flex}.lx-matrix-cell strong:before{content:"";background:var(--dot);border-radius:50%;flex:none;width:8px;height:8px}.lx-matrix-cell span{color:var(--text-secondary);word-break:keep-all;font-size:13.5px;line-height:1.7}.lx-matrix-cell.is-stable_understanding{--dot:var(--state-stable)}.lx-matrix-cell.is-uncertain_correct{--dot:var(--state-uncertain)}.lx-matrix-cell.is-knowledge_gap{--dot:var(--state-gap)}.lx-matrix-cell.is-high_confidence_miss{--dot:var(--state-miss);background:var(--warm-soft)}.lx-matrix-cell.is-high_confidence_miss strong{color:var(--warm-text)}.lx-loop{border-top:1px solid var(--border-strong);grid-template-columns:repeat(4,minmax(0,1fr));align-self:start;margin:0;padding:0;list-style:none;display:grid}.lx-loop li{flex-direction:column;gap:6px;padding:22px 16px 0 0;display:flex;position:relative}.lx-loop li:before{content:"";border:1.5px solid var(--accent);background:var(--surface-page);border-radius:50%;width:9px;height:9px;position:absolute;top:-5px;left:0}.lx-loop 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var(--focus-ring);outline-offset:2px}.notification-badge{border:2px solid var(--surface-page);background:var(--danger-solid);color:#fff;border-radius:9px;place-items:center;min-width:17px;height:17px;padding:0 4px;font-size:9px;font-weight:750;line-height:1;display:grid;position:absolute;top:-3px;right:-4px}.notification-panel{z-index:70;border:1px solid var(--border-default);background:var(--surface-card);width:min(360px,100vw - 24px);box-shadow:0 22px 48px -22px var(--shadow-modal-color), 0 2px 8px var(--shadow-soft);border-radius:16px;position:absolute;top:calc(100% + 10px);right:0;overflow:hidden}.notification-head{border-bottom:1px solid var(--border-subtle);justify-content:space-between;align-items:center;gap:12px;padding:15px 16px;display:flex}.notification-head>div{align-items:baseline;gap:8px;display:flex}.notification-head strong{color:var(--text-strong);font-size:15px}.notification-head span{color:var(--text-muted);font-size:11px}.notification-head button{color:var(--accent-text);cursor:pointer;background:0 0;border-radius:8px;align-items:center;gap:5px;padding:5px 7px;font-size:11px;font-weight:650;display:inline-flex}.notification-head button:disabled{opacity:.45;cursor:default}.notification-list{max-height:min(430px,70vh);overflow-y:auto}.notification-item{border-bottom:1px solid var(--border-subtle);text-align:left;cursor:pointer;background:0 0;gap:10px;width:100%;padding:13px 16px;display:flex;position:relative}.notification-item:hover{background:var(--surface-hover)}.notification-item.is-unread{background:var(--accent-soft)}.notification-unread-dot{background:0 0;border-radius:50%;flex:none;width:6px;height:6px;margin-top:6px}.notification-item.is-unread .notification-unread-dot{background:var(--accent-solid)}.notification-copy{flex-direction:column;gap:3px;min-width:0;display:flex}.notification-copy strong{color:var(--text-strong);font-size:13px}.notification-copy>span{color:var(--text-secondary);white-space:normal;overflow-wrap:anywhere;font-size:12px;line-height:1.55}.notification-copy time{color:var(--text-muted);font-size:10.5px}.notification-empty{min-height:150px;color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;gap:9px;padding:24px;font-size:12px;display:flex}.notification-empty strong{color:var(--text-secondary);font-size:13px}.notification-error{color:var(--danger-text);margin:10px 14px 0;font-size:11px;line-height:1.5}@media (width<=600px){.notification-trigger{width:44px;height:44px}.notification-panel{right:-52px}}:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--surface-page:#fbfcfc;--surface-chrome:#f5f7f8;--surface-card:#fff;--surface-inset:#f7f9fa;--surface-pressed:#e6ecec;--surface-hover:#eef2f1;--surface-leaf-soft:#edf4ef;--surface-leaf-strong:#e1eae3;--accent-soft:#e9f3f5;--warm-soft:#fbf0dd;--danger-soft:#fff2ef;--notice-info-bg:#f0f6f8;--warn-soft-bg:#fefce8;--surface-glass:#ffffffd1;--surface-glass-strong:#ffffffbf;--border-subtle:#eef2f0;--border-default:#e6eaec;--border-strong:#d9e3e7;--border-control:#c2d2cb;--border-dashed:#cfdde3;--border-accent:#dbe8e6;--border-accent-strong:#b7d6ce;--border-leaf:#cfdacd;--border-leaf-strong:#b4cdbf;--border-warm:#eee5d5;--border-danger:#f3d7d0;--border-info:#dde9ee;--warn-soft-border:#fef08a;--text-strong:#1c2b30;--text-primary:#2e3d43;--text-body:#4a5d66;--text-secondary:#55636c;--text-muted:#63717a;--text-faint:#87949a;--leaf-text:#4d735c;--leaf-text-strong:#36674c;--leaf-icon:#60806b;--accent-text:#0b7285;--accent-text-strong:#0f6b7b;--accent-text-muted:#50737f;--warm-text:#8f6530;--warm-text-strong:#ae8750;--warn-icon:#b45309;--warn-soft-text:#854d0e;--danger-text:#9d5243;--danger-text-strong:#dc2626;--accent:#0b7285;--accent-hover:#085e6f;--accent-pressed:#074f5e;--accent-contrast:#fff;--accent-line:#0b7285;--accent-decoration:#8fc3c7;--accent-gradient-end:#3fb0a6;--required-mark:#00795f;--accent-glow:#c5e4e48c;--accent-glow-soft:#0b728514;--accent-glow-fade:#c5e4e400;--state-default:#79927f;--state-stable:#447d8b;--state-miss:#96652f;--state-uncertain:#7d7429;--state-gap:#6e7074;--focus-ring:#2f98ab;--selection-bg:#cde9e9;--recording-dot:#b46767;--recording-ring:#f4e9e9;--shadow-color:#10282d0f;--shadow-soft:#10282d0a;--shadow-accent:#0b728514;--shadow-accent-strong:#0b728538;--shadow-accent-soft:#00a68514;--shadow-accent-fade:#00a68500;--shadow-modal-color:#0e221b30;--overlay:#10282d52;--book-cover:#eff4f6;--book-cover-border:#c9d9df;--book-cover-shadow:#e3edf0;--book-line:#b5ccd5;--book-spine:#d5e2e7;--book-icon:#7b9ba6;--book-sheet:#f9fbfc;--book-sheet-border:#e1e8eb;--decor-line:#e2e8e3;--art-orbit:#d4e1d3;--art-solid-border:#bacfbe;--art-shadow:#d6e3d7;--art-ink:#446b57;--art-bar:#aec4b0;--art-dot:#82a38a;--art-plus:#93ae97;--kakao-bg:#fee500;--kakao-hover:#fada0a;--kakao-text:#191919;--switch-track:#7ab8f5;--switch-sky:linear-gradient(135deg, 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1)}:root{color:var(--text-primary);background:var(--surface-page);font-synthesis:none;--cyan:var(--accent);--muted:var(--text-muted);--line:var(--border-default);--paper:var(--surface-card);--soft:var(--accent-soft);--sidebar:238px;font-family:Pretendard Variable,Pretendard,-apple-system,BlinkMacSystemFont,system-ui,Roboto,Helvetica Neue,Segoe UI,Apple SD Gothic Neo,Noto Sans KR,Malgun Gothic,sans-serif;font-weight:400}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}input:disabled,select:disabled,textarea:disabled{opacity:.6;cursor:not-allowed}button{color:inherit;background:0 0;border:0}a{color:inherit}button:focus-visible,[tabindex]:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid var(--focus-ring);outline-offset:4px}button:focus:not(:focus-visible){outline:none}button,a{touch-action:manipulation}h1,h2,h3,p{margin:0}svg{flex-shrink:0}::selection{background:var(--selection-bg)}.sidebar{width:var(--sidebar);background:var(--surface-hover);border-right:1px solid var(--border-default);z-index:10;flex-direction:column;padding:37px 22px 24px;display:flex;position:fixed;inset:0 auto 0 0}.brand{letter-spacing:-1.2px;align-items:center;gap:9px;width:max-content;padding:0 16px;font-size:24px;font-weight:750;display:flex}.brand-symbol{gap:3px;display:flex;transform:skewY(-14deg)}.brand-symbol i{background:var(--accent);border-radius:2px;width:7px;height:22px}.brand-symbol i:nth-child(2){height:15px;margin-top:7px}.brand-symbol i:nth-child(3){height:19px;margin-top:3px}.workspace-label{letter-spacing:1.2px;color:var(--text-muted);justify-content:space-between;align-items:center;margin:57px 16px 14px;font-size:11px;display:flex}.nav{flex-direction:column;gap:7px;display:flex}.nav button,.nav a.nav-external{text-align:left;color:var(--text-secondary);transition:background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);border-radius:7px;align-items:center;gap:12px;padding:13px 16px;font-size:14px;font-weight:500;text-decoration:none;display:flex}.nav button:hover,.nav a.nav-external:hover{background:var(--surface-hover)}.nav button:active,.nav a.nav-external:active{background:var(--surface-pressed)}.nav button.active{background:var(--surface-leaf-strong);color:var(--accent-text-strong);font-weight:650}.nav .count{background:var(--surface-leaf-strong);border-radius:4px;margin-left:auto;padding:1px 6px;font-size:11px}.sidebar-bottom{margin-top:auto}.profile{border-top:1px solid var(--border-strong);align-items:center;gap:10px;padding:12px;display:flex}.avatar{background:var(--surface-leaf-strong);width:34px;height:34px;color:var(--leaf-text);border-radius:50%;place-items:center;font-size:12px;font-weight:650;display:grid;overflow:hidden}.avatar img{object-fit:cover;width:100%;height:100%;display:block}.profile-name{font-size:13px;font-weight:600;line-height:1.4}.profile-sub{color:var(--text-muted);word-break:keep-all;margin-top:3px;font-size:10px}.profile .mini-tag{white-space:nowrap;color:var(--leaf-text);border:1px solid var(--border-leaf);border-radius:4px;margin-left:auto;padding:3px 5px;font-size:9px}.main{margin-left:var(--sidebar);min-height:100vh}.topbar{border-bottom:1px solid var(--line);background:var(--surface-page);justify-content:space-between;align-items:center;height:83px;padding:0 55px;display:flex}.breadcrumb{color:var(--text-muted);align-items:center;gap:12px;font-size:12px;display:flex}.breadcrumb span:last-child{color:var(--text-primary)}.top-actions{color:var(--text-muted);align-items:center;gap:16px;font-size:11px;display:flex}.icon-btn{width:32px;height:32px;color:var(--text-muted);transition:background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);border-radius:50%;flex:none;justify-content:center;align-items:center;display:flex}.icon-btn:hover{background:var(--surface-hover);color:var(--text-secondary)}.icon-btn:active{background:var(--surface-pressed)}.page{max-width:1290px;margin:0 auto;padding:51px 64px 40px}.eyebrow{color:var(--accent-text);letter-spacing:1.8px;text-transform:uppercase;margin-bottom:14px;font-size:10px;font-weight:650}.subtitle{color:var(--text-muted);margin-top:12px;font-size:13px;line-height:1.9}.title-row{justify-content:space-between;align-items:center;gap:20px;margin-bottom:37px;display:flex}.date-label{color:var(--text-muted);white-space:nowrap;align-self:flex-start;margin-top:16px;font-size:11px}.primary{background:var(--accent);color:var(--accent-contrast);min-height:46px;transition:background var(--motion-fast) var(--ease-standard), transform var(--motion-fast) var(--ease-standard);border-radius:6px;justify-content:center;align-items:center;gap:17px;padding:13px 22px;font-size:13px;font-weight:550;display:inline-flex}.primary:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px)}.primary:active:not(:disabled){background:var(--accent-pressed);transform:translateY(0)}.secondary{border:1px solid var(--border-strong);background:var(--surface-card);min-height:42px;color:var(--text-body);transition:background var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard);border-radius:6px;align-items:center;gap:9px;padding:11px 17px;font-size:12px;display:inline-flex}.secondary:hover{background:var(--surface-hover)}.secondary:active:not(:disabled){background:var(--surface-pressed)}.text-button{color:var(--text-muted);transition:color var(--motion-fast) var(--ease-standard);align-items:center;gap:7px;padding:7px 0;font-size:12px;display:inline-flex}.text-button:active:not(:disabled){color:var(--accent-text-strong)}.text-button:hover{color:var(--accent-text)}.tag{background:var(--surface-leaf-soft);color:var(--leaf-text);border-radius:4px;align-items:center;gap:5px;padding:5px 8px;font-size:10px;display:inline-flex}.tag.warm{background:var(--warm-soft);color:var(--warm-text)}.section-heading{justify-content:space-between;align-items:center;margin-bottom:17px;display:flex}.section-heading h2{letter-spacing:-.4px;font-size:15px;font-weight:600}.section-heading h2 span{color:var(--text-muted);margin-left:9px;font-size:11px;font-weight:400}.focus-card{background:var(--surface-card);border:1px solid var(--border-strong);min-height:260px;box-shadow:0 5px 20px var(--shadow-modal-color);border-radius:12px;grid-template-columns:minmax(0,1fr) 265px;display:grid;overflow:hidden}.focus-content{padding:30px 34px}.focus-card .eyebrow{letter-spacing:1px;color:var(--text-muted);margin-bottom:16px;font-size:9px}.course-tags{align-items:center;gap:7px;margin-bottom:14px;display:flex}.focus-card h2{letter-spacing:-1px;font-size:24px;font-weight:650;line-height:1.5}.focus-card .description{color:var(--text-muted);max-width:480px;margin-top:8px;font-size:12px;line-height:1.9}.focus-actions{align-items:center;gap:18px;margin-top:26px;display:flex}.focus-actions .meta{color:var(--text-muted);font-size:11px}.focus-art{background:var(--surface-leaf-soft);border-left:1px solid var(--border-strong);place-items:center;min-height:250px;display:grid;position:relative;overflow:hidden}.art-orbit{border:1px solid var(--art-orbit);border-radius:50%;width:215px;height:215px;position:absolute;transform:rotate(-20deg)scaleY(.56)}.art-orbit.second{width:240px;height:240px;transform:rotate(53deg)scaleY(.66)}.art-orbit.third{width:200px;height:200px;transform:rotate(-54deg)scaleY(.72)}.art-core{background:var(--surface-leaf-strong);border:1px solid var(--art-solid-border);width:83px;height:105px;box-shadow:12px 10px 0 var(--art-shadow);color:var(--art-ink);border-radius:10px;flex-direction:column;justify-content:center;align-items:center;gap:9px;display:flex;position:relative;transform:rotate(-14deg)}.art-core:before,.art-core:after{content:"";background:var(--art-bar);border-radius:2px;width:40px;height:3px}.art-dot{background:var(--art-dot);width:11px;height:11px;box-shadow:0 0 0 5px var(--surface-leaf-strong);border-radius:50%;position:absolute;top:55px;right:53px}.art-plus{color:var(--art-plus);position:absolute;bottom:58px;left:32px}.art-label{letter-spacing:1.3px;color:var(--text-faint);font-size:9px;position:absolute;bottom:18px}.path-strip{color:var(--text-faint);align-items:center;gap:10px;padding:20px 6px 28px;display:flex}.path-step{white-space:nowrap;align-items:center;gap:8px;font-size:10px;display:flex}.path-step.current{color:var(--leaf-text-strong);font-weight:550}.step-number{border:1px solid var(--border-strong);border-radius:50%;place-items:center;width:19px;height:19px;font-size:9px;display:grid}.current .step-number{background:var(--surface-leaf-strong);border-color:var(--border-leaf)}.path-line{background:var(--decor-line);flex:1;max-width:80px;height:1px}.entry-section{margin-top:24px}.entry-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;display:grid}.entry{background:var(--surface-card);border:1px solid var(--line);text-align:left;transition:border-color var(--motion-base), transform var(--motion-base);border-radius:8px;padding:21px 20px 19px}.entry:hover{border-color:var(--border-leaf-strong);transform:translateY(-2px)}.entry-icon{background:var(--surface-leaf-soft);width:35px;height:35px;color:var(--leaf-icon);border-radius:8px;place-items:center;margin-bottom:20px;display:grid}.entry-title{justify-content:space-between;align-items:center;font-size:13px;font-weight:600;display:flex}.entry-title svg{color:var(--text-faint)}.entry-description{color:var(--text-faint);margin-top:7px;font-size:10px;line-height:1.7}.recent-section{margin-top:39px}.project-row{border-top:1px solid var(--line);align-items:center;gap:17px;padding:20px 5px;display:flex}.project-icon{background:var(--surface-leaf-soft);width:37px;height:43px;color:var(--leaf-icon);border-radius:5px;place-items:center;display:grid}.project-info{flex:1}.project-info strong{margin-bottom:6px;font-size:12px;font-weight:550;display:block}.project-info p{color:var(--text-faint);font-size:10px}.project-row .text-button{font-size:11px}.footnote{color:var(--text-faint);border-top:1px solid var(--line);align-items:center;gap:7px;margin-top:45px;padding-top:19px;font-size:10px;display:flex}.empty{background:var(--surface-card);border:1px dashed var(--border-strong);color:var(--text-muted);border-radius:10px;padding:38px 28px;font-size:13px;line-height:1.9}.empty h3{color:var(--text-primary);margin-bottom:8px;font-size:16px}.empty .secondary{margin-top:16px}@media (width>=601px){.empty>.secondary{width:fit-content;display:flex}}.narrow{max-width:910px}.panel{background:var(--surface-card);border:1px solid var(--line);border-radius:12px;margin-top:26px;padding:31px}.form-grid{grid-template-columns:1fr 1fr;gap:22px;display:grid}.field{flex-direction:column;gap:10px;margin-bottom:23px;display:flex}.field.full{grid-column:1/-1}.field label,.field-label{color:var(--text-body);font-size:12px;font-weight:550}.field input,.field select,.field textarea{border:1px solid var(--border-strong);background:var(--surface-card);min-width:0;color:var(--text-primary);border-radius:6px;padding:13px;font-size:13px}.field textarea{resize:vertical;min-height:110px;line-height:1.8}.form-footer{border-top:1px solid var(--line);color:var(--text-muted);justify-content:space-between;align-items:center;gap:16px;padding-top:23px;font-size:11px;display:flex}.notice{background:var(--surface-leaf-soft);border:1px solid var(--border-strong);color:var(--accent-text-muted);border-radius:7px;gap:10px;margin-top:23px;padding:15px 18px;font-size:12px;line-height:1.8;display:flex}.notice svg{margin-top:3px}.notice.error{background:var(--danger-soft);border-color:var(--border-danger);color:var(--danger-text)}.notice.warn{background:var(--warm-soft);border-color:var(--border-warm);color:var(--warm-text)}.admin-page .title-row{margin-bottom:28px}.admin-metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:13px;display:grid}.admin-metric{border:1px solid var(--line);background:var(--paper);border-radius:10px;align-items:center;gap:13px;min-height:106px;padding:20px;display:flex}.admin-metric-icon{width:39px;height:39px;color:var(--accent-text);background:var(--accent-soft);border-radius:9px;place-items:center;display:grid}.admin-metric span{color:var(--text-muted);margin-bottom:7px;font-size:11px;display:block}.admin-metric strong{letter-spacing:-.6px;color:var(--text-strong);word-break:keep-all;font-size:19px;display:block}.admin-log-panel{margin-top:18px}.admin-table-wrap{overflow-x:auto}.admin-table{border-collapse:collapse;text-align:left;width:100%;min-width:760px}.admin-table th,.admin-table td{border-bottom:1px solid var(--line);white-space:nowrap;padding:13px 10px;font-size:11px}.admin-table th{color:var(--text-muted);background:var(--surface-inset);font-weight:600}.admin-table td{color:var(--text-body)}.admin-table tr:last-child td{border-bottom:0}.admin-service-metrics{margin-top:13px}.admin-metric-hint{color:var(--text-muted);word-break:keep-all;margin-top:5px;font-size:10px;font-style:normal;display:block}.admin-user-name{color:var(--text-strong);font-size:11px;display:block}.admin-table-tall{max-height:560px;overflow-y:auto}.admin-table-tall thead th{z-index:1;position:sticky;top:0}.admin-table th.num,.admin-table td.num{text-align:right;font-variant-numeric:tabular-nums}.upload-zone{border:1px dashed var(--border-dashed);text-align:center;background:var(--surface-inset);border-radius:9px;margin:25px 0;padding:36px}.upload-zone svg{color:var(--leaf-icon);margin-bottom:14px}.upload-zone h3{margin-bottom:8px;font-size:16px;font-weight:550}.upload-zone p{color:var(--text-muted);margin-bottom:22px;font-size:12px}.source-text{color:var(--text-body);background:var(--surface-inset);white-space:pre-wrap;border-radius:10px;margin:24px 0;padding:12px 16px;font-size:14px;line-height:2.1}.concept-row{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:15px;padding:18px 0;display:flex}.concept-row h3{margin-bottom:6px;font-size:13px;font-weight:550}.concept-row p{color:var(--text-muted);font-size:11px}.concept-number{color:var(--text-muted);width:28px;font-size:12px}.concept-name{flex:1}.quiz-progress{color:var(--text-muted);align-items:center;gap:14px;margin-bottom:28px;font-size:11px;display:flex}.progress-track{background:var(--surface-hover);border-radius:2px;flex:1;height:3px}.progress-track i{background:var(--accent);height:100%;transition:width var(--motion-slow);display:block}.quiz-layout{grid-template-columns:minmax(0,1fr) 218px;align-items:start;gap:25px;display:grid}.question-panel{background:var(--surface-card);border:1px solid var(--line);border-radius:10px;padding:33px}.question-panel h2{letter-spacing:-.6px;white-space:pre-line;margin:20px 0 30px;font-size:21px;font-weight:550;line-height:1.8}.option-list{flex-direction:column;gap:10px;display:flex}.option{border:1px solid var(--border-strong);text-align:left;transition:background var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard);border-radius:7px;align-items:center;gap:14px;padding:16px;font-size:13px;line-height:1.7;display:flex}.option:active{background:var(--surface-pressed)}.option:hover{background:var(--surface-hover);border-color:var(--border-leaf-strong)}.option.selected{background:var(--accent-soft);border-color:var(--accent-line);color:var(--accent-text-strong)}.option-letter{background:var(--surface-hover);width:25px;height:25px;color:var(--text-secondary);border-radius:50%;flex-shrink:0;place-items:center;font-size:11px;display:grid}.selected .option-letter{background:var(--accent);color:var(--accent-contrast)}.question-footer{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;margin-top:30px;padding-top:23px;display:flex}.question-footer p{color:var(--text-muted);font-size:11px;line-height:1.8}.question-footer>:only-child{margin-left:auto}.quiz-aside{background:var(--surface-leaf-soft);border-radius:8px;padding:24px 20px}.quiz-aside 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