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.18s}@media(min-width:900px){:root{--ui-size: 17px;--passage-size: var(--passage-size-desktop);--gutter: 28px}}:root[data-theme=dark]{color-scheme:dark;--paper: #0f1c1a;--surface: #152724;--surface-2: #1a2f2c;--ink: #e8efec;--muted: #a9bab5;--line: #2a403c;--line-strong: #3a5550;--teal: #5cc2b5;--teal-deep: #8fd9cf;--teal-tint: #1d3b37;--on-teal: #0b1715;--accent: #e2a54a;--accent-ink: #f0c27a;--accent-tint: #3d2e14;--good: #6bcb8e;--good-tint: #173326;--bad: #f08a72;--bad-tint: #3b1e17;--hl-main: #5c4a1c;--hl-detail: #1f4d45;--hl-key: #5a3226;--lvl-high: #2e8b50;--lvl-mid: #9ccc65;--lvl-low: #f39c33;--lvl-vlow: #e05252;--lvl-vlow-ink: #1a0505;--shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 4px 14px rgb(0 0 0 / 25%);--shadow-l: 0 8px 32px rgb(0 0 0 / 45%)}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--paper: #0f1c1a;--surface: #152724;--surface-2: #1a2f2c;--ink: #e8efec;--muted: #a9bab5;--line: #2a403c;--line-strong: #3a5550;--teal: #5cc2b5;--teal-deep: #8fd9cf;--teal-tint: #1d3b37;--on-teal: #0b1715;--accent: #e2a54a;--accent-ink: #f0c27a;--accent-tint: #3d2e14;--good: #6bcb8e;--good-tint: #173326;--bad: #f08a72;--bad-tint: #3b1e17;--hl-main: #5c4a1c;--hl-detail: #1f4d45;--hl-key: #5a3226;--lvl-high: #2e8b50;--lvl-mid: #9ccc65;--lvl-low: #f39c33;--lvl-vlow: #e05252;--lvl-vlow-ink: #1a0505;--shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 4px 14px rgb(0 0 0 / 25%);--shadow-l: 0 8px 32px rgb(0 0 0 / 45%)}}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-ui);font-size:var(--ui-size);line-height:1.7;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;min-height:100vh}*{letter-spacing:normal!important}em,i,cite,dfn,var,address{font-style:normal}em{font-weight:600}h1,h2,h3,h4{line-height:1.45;margin:0 0 .5em;font-weight:700;text-wrap:balance}h1{font-size:clamp(1.45rem,1.1rem + 1.4vw,2rem)}h2{font-size:clamp(1.2rem,1rem + .7vw,1.45rem)}h3{font-size:1.1rem}p{margin:0 0 .8em}a{color:var(--teal);text-underline-offset:.3em}a:hover{color:var(--teal-deep)}img,video{max-width:100%;display:block}button,input,select,textarea{font:inherit;color:inherit}:focus-visible{outline:none;box-shadow:var(--focus);border-radius:var(--radius-s)}::selection{background:var(--hl-main);color:var(--ink)}[hidden]{display:none!important}.sr-only{position:absolute!important;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.skip-link{position:absolute;inset-inline-start:12px;top:-60px;z-index:100;background:var(--teal);color:var(--on-teal);padding:8px 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a[aria-current=page]{color:var(--teal);background:var(--teal-tint)}.topbar-actions{margin-inline-start:auto;display:flex;gap:4px;align-items:center}.icon-btn{width:40px;height:40px;display:inline-grid;place-items:center;border:0;border-radius:999px;background:transparent;color:var(--muted);cursor:pointer;text-decoration:none}.icon-btn:hover{background:var(--surface-2);color:var(--ink)}.icon{width:22px;height:22px;flex:none}.icon-s{width:18px;height:18px}.bottomnav{position:fixed;inset-inline:0;bottom:0;z-index:30;height:calc(var(--bottom-nav-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:var(--surface);border-block-start:1px solid var(--line)}.bottomnav a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:.75rem;position:relative}.bottomnav a[aria-current=page]{color:var(--teal)}.bottomnav 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p{color:var(--muted);margin:0;max-width:65ch}.crumbs{font-size:.875rem;color:var(--muted);margin-block-end:6px;display:flex;gap:6px;flex-wrap:wrap}.crumbs a{color:var(--muted)}.stack{display:flex;flex-direction:column;gap:16px}.stack-s{display:flex;flex-direction:column;gap:8px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.row-between{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}.grid,.grid-2,.grid-3{display:grid;gap:16px}@media(min-width:700px){.grid-2,.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(min-width:1000px){.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);padding:18px;box-shadow:var(--shadow);min-width:0}@media(min-width:700px){.card{padding:22px 24px}}.card-flat{box-shadow:none}.card-title{font-size:1.05rem;margin:0 0 4px}.card-sub{color:var(--muted);font-size:.9rem;margin:0}.card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-block-end:14px}.kicker{font-size:.8rem;font-weight:600;color:var(--accent-ink);margin-block-end:2px}.callout{border-radius:var(--radius);padding:12px 16px;background:var(--surface-2);border:1px solid var(--line);border-inline-start:4px solid var(--teal)}.callout-warn{border-inline-start-color:var(--accent);background:color-mix(in srgb,var(--accent-tint) 45%,var(--surface))}.callout-bad{border-inline-start-color:var(--bad);background:var(--bad-tint)}.callout-good{border-inline-start-color:var(--good);background:var(--good-tint)}.callout p:last-child{margin:0}.banner{font-size:.9rem;padding:8px var(--gutter);text-align:center;background:var(--accent-tint);color:var(--ink);border-block-end:1px solid var(--line)}.disclaimer{font-size:.82rem;color:var(--muted);display:flex;gap:8px;align-items:flex-start;margin:10px 0 0}.disclaimer .icon{width:18px;height:18px;margin-top:3px;color:var(--accent-ink)}.btn{--b: var(--surface);--c: var(--ink);--bd: var(--line-strong);display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:8px 18px;border-radius:999px;border:1px solid var(--bd);background:var(--b);color:var(--c);font-weight:600;text-decoration:none;cursor:pointer;transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);white-space:nowrap}.btn:hover{border-color:var(--teal);color:var(--c)}.btn:active{transform:translateY(1px)}.btn:disabled,.btn[aria-disabled=true]{opacity:.5;cursor:not-allowed;transform:none}.btn-primary{--b: var(--teal);--c: var(--on-teal);--bd: var(--teal)}.btn-primary:hover{--b: var(--teal-deep);--bd: var(--teal-deep)}.btn-accent{--b: var(--accent);--c: #2b1600;--bd: var(--accent)}.btn-ghost{--b: transparent;--bd: transparent;--c: var(--teal)}.btn-ghost:hover{background:var(--teal-tint);border-color:transparent}.btn-danger{--c: var(--bad);--bd: var(--bad)}.btn-sm{min-height:36px;padding:4px 12px;font-size:.9rem}.btn-block{width:100%}.chip{display:inline-flex;align-items:center;gap:6px;padding:2px 10px;border-radius:999px;font-size:.8rem;font-weight:600;background:var(--surface-2);border:1px solid var(--line);color:var(--muted);white-space:nowrap}.chip-teal{background:var(--teal-tint);color:var(--teal);border-color:transparent}.chip-accent{background:var(--accent-tint);color:var(--accent-ink);border-color:transparent}.chip-good{background:var(--good-tint);color:var(--good);border-color:transparent}.chip-bad{background:var(--bad-tint);color:var(--bad);border-color:transparent}.field{display:flex;flex-direction:column;gap:6px}.field label,.field .label{font-weight:600}.input,.textarea,.select{width:100%;border:1px solid var(--line-strong);background:var(--surface);border-radius:var(--radius);padding:10px 14px;min-height:44px}.textarea{min-height:120px;resize:vertical;line-height:1.9;font-family:var(--font-read);font-size:calc(var(--passage-size) - 2px)}.input:focus-visible,.textarea:focus-visible,.select:focus-visible{border-color:var(--teal);border-radius:var(--radius)}.seg{display:inline-flex;padding:3px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line);gap:2px;flex-wrap:wrap}.seg button{border:0;background:transparent;padding:6px 14px;border-radius:999px;cursor:pointer;color:var(--muted);font-weight:600;min-height:36px}.seg button[aria-pressed=true],.seg button[aria-checked=true]{background:var(--surface);color:var(--teal);box-shadow:var(--shadow)}.switch{display:inline-flex;align-items:center;gap:8px;cursor:pointer;font-weight:500;border:0;background:none;padding:4px 0;color:var(--ink)}.switch-track{width:40px;height:24px;border-radius:999px;background:var(--line-strong);position:relative;transition:background var(--dur);flex:none}.switch-track:after{content:"";position:absolute;top:3px;inset-inline-start:3px;width:18px;height:18px;border-radius:50%;background:#fff;transition:inset-inline-start var(--dur) var(--ease)}.switch[aria-checked=true] .switch-track{background:var(--teal)}.switch[aria-checked=true] .switch-track:after{inset-inline-start:19px}.switch:disabled{opacity:.5;cursor:not-allowed}.tabs{display:flex;border-block-end:1px solid var(--line);gap:4px;overflow-x:auto}.tabs [role=tab]{border:0;background:none;padding:10px 14px;font-weight:600;color:var(--muted);cursor:pointer;border-block-end:3px solid transparent;margin-block-end:-1px;white-space:nowrap}.tabs [role=tab][aria-selected=true]{color:var(--teal);border-block-end-color:var(--teal)}.meter{height:8px;border-radius:999px;background:var(--line);overflow:hidden}.meter>span{display:block;height:100%;border-radius:inherit;background:var(--teal);transition:width .4s var(--ease)}.skel{border-radius:var(--radius-s);background:linear-gradient(90deg,var(--line) 0%,var(--surface-2) 50%,var(--line) 100%);background-size:200% 100%;animation:shimmer 1.4s infinite linear;min-height:14px}.skel-line{height:14px;margin-block:10px}.skel-title{height:26px;width:50%;margin-block-end:18px}.skel-block{height:140px}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.level{display:inline-flex;align-items:center;gap:6px;padding:4px 14px;border-radius:999px;font-weight:700;white-space:nowrap}.level-high{background:var(--lvl-high);color:var(--lvl-high-ink)}.level-mid{background:var(--lvl-mid);color:var(--lvl-mid-ink)}.level-low{background:var(--lvl-low);color:var(--lvl-low-ink)}.level-vlow{background:var(--lvl-vlow);color:var(--lvl-vlow-ink)}.level-none{background:var(--surface-2);color:var(--muted);border:1px dashed var(--line-strong)}.level-scale{display:grid;grid-template-columns:repeat(4,1fr);gap:3px;margin-block:12px 4px;direction:ltr}.level-scale>div{height:10px;border-radius:3px;opacity:.35}.level-scale>div.on{opacity:1;outline:2px solid var(--ink);outline-offset:1px}.level-scale .s-vlow{background:var(--lvl-vlow)}.level-scale .s-low{background:var(--lvl-low)}.level-scale .s-mid{background:var(--lvl-mid)}.level-scale .s-high{background:var(--lvl-high)}.level-scale-labels{display:grid;grid-template-columns:repeat(4,1fr);font-size:.72rem;color:var(--muted);text-align:center;direction:ltr}.level-scale-labels span{direction:rtl}.score-big{font-size:clamp(2.4rem,1.8rem + 2.5vw,3.4rem);font-weight:700;line-height:1.1;color:var(--teal)}.score-big small{font-size:.4em;color:var(--muted);font-weight:500}.mastery-domain+.mastery-domain{margin-block-start:18px}.mastery-domain h3{font-size:.95rem;display:flex;gap:8px;align-items:baseline;margin-block-end:8px}.mastery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}.mtile{display:flex;flex-direction:column;gap:6px;padding:10px 12px;border-radius:var(--radius);border:1px solid var(--line);background:var(--surface-2);text-decoration:none;color:var(--ink);min-height:92px;position:relative;transition:border-color var(--dur),transform var(--dur) var(--ease)}a.mtile:hover{border-color:var(--teal);transform:translateY(-1px)}.mtile-code{font-size:.72rem;font-weight:700;color:var(--muted);direction:ltr;text-align:end}.mtile-name{font-size:.86rem;font-weight:600;line-height:1.5;flex:1}.mtile .meter{height:6px}.mtile.m-learning .meter>span{background:var(--accent)}.mtile.m-near .meter>span{background:var(--lvl-mid)}.mtile.m-mastered{background:var(--good-tint);border-color:color-mix(in srgb,var(--good) 35%,transparent)}.mtile.m-mastered .meter>span{background:var(--good)}.mtile .mtile-state{position:absolute;top:8px;inset-inline-start:10px}.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:.8rem;color:var(--muted);margin-block-start:12px}.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-inline-end:6px;vertical-align:middle}.stat{display:flex;flex-direction:column}.stat b{font-size:1.5rem;line-height:1.3}.stat span{color:var(--muted);font-size:.85rem}.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:12px}.unit{display:grid;grid-template-columns:44px 1fr;gap:4px 14px}.unit-num{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;font-weight:700;background:var(--teal-tint);color:var(--teal);font-size:1.1rem}.unit-mock .unit-num{background:var(--accent-tint);color:var(--accent-ink)}.lesson-list{list-style:none;padding:0;margin:10px 0 0;display:flex;flex-direction:column;gap:8px;grid-column:1 / -1}@media(min-width:700px){.lesson-list{grid-column:2}}.lesson-link{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:var(--radius);border:1px solid var(--line);background:var(--surface-2);color:var(--ink);text-decoration:none}a.lesson-link:hover{border-color:var(--teal)}.lesson-link .grow{flex:1;min-width:0}.lesson-link.is-unavailable{opacity:.6}.status-dot{width:26px;height:26px;border-radius:50%;border:2px solid var(--line-strong);display:grid;place-items:center;flex:none;color:var(--on-teal)}.status-dot.is-progress{border-color:var(--accent);background:conic-gradient(var(--accent) var(--p, 30%),transparent 0)}.status-dot.is-done{border-color:var(--good);background:var(--good)}.passage{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);padding:14px 16px 18px}@media(min-width:700px){.passage{padding:18px 26px 24px}}.passage-tools{display:flex;align-items:center;gap:6px 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