:root{color-scheme:light;--bg: #f3f6f3;--surface: #ffffff;--surface-soft: #f7f9f7;--surface-raised: #ffffff;--ink: #19352f;--ink-soft: #35514a;--muted: #6a7c76;--muted-light: #91a19b;--brand: #123c35;--brand-2: #1b574a;--brand-3: #287463;--brand-soft: #e6f1ec;--accent: #f3b85f;--accent-light: #fff2d9;--accent-ink: #74460d;--line: #dfe7e2;--line-strong: #cbd8d0;--green: #27755a;--green-soft: #e9f5ee;--red: #b44b4b;--red-soft: #fff0ee;--blue: #426e8d;--blue-soft: #eaf2f7;--orange: #ae6236;--orange-soft: #fff0e6;--shadow-sm: 0 1px 2px rgba(18, 60, 53, .04), 0 4px 14px rgba(18, 60, 53, .035);--shadow-md: 0 14px 36px rgba(18, 60, 53, .09);--radius: 18px;--radius-lg: 24px;--sidebar-width: 258px;--font: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}:root[data-theme=dark]{color-scheme:dark;--bg: #0e1b18;--surface: #152722;--surface-soft: #1a2d28;--surface-raised: #1b302a;--ink: #edf5f0;--ink-soft: #cad9d2;--muted: #a1b5ad;--muted-light: #718c82;--brand: #0d3029;--brand-2: #246b5a;--brand-3: #4b9a83;--brand-soft: #203c33;--accent: #f1bb6d;--accent-light: #3b3425;--accent-ink: #f5d49e;--line: #2b4039;--line-strong: #3c554c;--green: #6ec69d;--green-soft: #1d3a2f;--red: #f0928d;--red-soft: #3d2827;--blue: #8bbbd6;--blue-soft: #20343f;--orange: #e4a17b;--orange-soft: #3d2e25;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .15);--shadow-md: 0 16px 40px rgba(0, 0, 0, .25)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;min-width:320px;min-height:100vh;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{color:inherit}a{color:inherit;text-decoration:none}img,svg{display:block}h1,h2,h3,p{margin-top:0}h1,h2,h3{color:var(--ink);letter-spacing:-.025em}p{color:var(--ink-soft)}button{border:0;background:none;cursor:pointer}button:disabled{cursor:not-allowed}[hidden]{display:none!important}::selection{background:var(--accent);color:#173a32}:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.skip-link{position:fixed;top:-60px;left:20px;z-index:1000;padding:10px 16px;background:var(--surface);border-radius:8px;box-shadow:var(--shadow-md)}.skip-link:focus{top:12px}.icon{flex:0 0 auto}.muted-small{color:var(--muted);font-size:.82rem}.eyebrow{display:block;margin-bottom:7px;color:var(--brand-3);font-size:.7rem;font-weight:800;letter-spacing:.13em;line-height:1.3}.full-width{width:100%}.app-shell{min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;z-index:30;display:flex;width:var(--sidebar-width);height:100dvh;flex-direction:column;padding:25px 18px 20px;overflow-y:auto;background:var(--surface);border-right:1px solid var(--line)}.workspace{min-height:100vh;margin-left:var(--sidebar-width)}.topbar{position:sticky;top:0;z-index:20;display:flex;height:68px;align-items:center;gap:12px;padding:0 30px;background:color-mix(in srgb,var(--bg) 91%,transparent);border-bottom:1px solid color-mix(in srgb,var(--line) 75%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.topbar-spacer{flex:1}.main-content{width:100%;max-width:1440px;margin:0 auto;padding:30px 32px 60px;outline:0}.mobile-brand,.mobile-nav{display:none}.brand{display:flex;align-items:center;gap:11px;padding:0 7px}.brand-mark{display:grid;width:42px;height:42px;flex:0 0 auto;place-items:center;color:var(--accent)}.brand-mark svg{width:100%;height:100%}.brand>span:last-child{display:flex;flex-direction:column}.brand strong{color:var(--brand);font-size:1.13rem;letter-spacing:-.03em}:root[data-theme=dark] .brand strong{color:var(--ink)}.brand small{margin-top:-1px;color:var(--muted);font-size:.69rem}.exam-label{display:flex;align-items:center;gap:7px;margin:21px 6px 25px;padding:8px 10px;color:var(--muted);background:var(--surface-soft);border:1px solid var(--line);border-radius:8px;font-size:.66rem;font-weight:650}.status-dot{width:6px;height:6px;background:var(--green);border-radius:50%;box-shadow:0 0 0 3px var(--green-soft)}.side-nav{display:flex;flex-direction:column;gap:5px}.nav-caption{margin:0 12px 6px;color:var(--muted-light);font-size:.62rem;font-weight:800;letter-spacing:.13em}.nav-caption-spaced{margin-top:19px}.nav-item{position:relative;display:flex;align-items:center;gap:12px;min-height:44px;padding:10px 13px;color:var(--muted);border-radius:11px;font-size:.88rem;font-weight:600;transition:background .18s ease,color .18s ease,transform .18s ease}.nav-item:hover{color:var(--ink);background:var(--surface-soft)}.nav-item.active{color:var(--brand);background:var(--brand-soft);font-weight:750}:root[data-theme=dark] .nav-item.active{color:#a8dfc6}.nav-item.active:before{position:absolute;left:-18px;width:3px;height:22px;background:var(--brand-3);border-radius:0 3px 3px 0;content:""}.sidebar-bottom{margin-top:auto;padding-top:30px}.offline-card{display:flex;align-items:flex-start;gap:9px;padding:12px;color:var(--brand-3);background:var(--brand-soft);border-radius:11px}.offline-card>div{display:flex;min-width:0;flex-direction:column}.offline-card strong{color:var(--ink-soft);font-size:.7rem}.offline-card span{margin-top:3px;color:var(--muted);font-size:.61rem;line-height:1.4}.install-link{display:flex;width:100%;align-items:center;gap:8px;margin-top:10px;padding:10px 12px;color:var(--muted);border-radius:9px;font-size:.72rem;font-weight:650;text-align:left}.install-link:hover{color:var(--brand-3);background:var(--surface-soft)}.install-link .icon:last-child{margin-left:auto}.independent-note{margin:14px 8px 0;color:var(--muted-light);font-size:.58rem;line-height:1.5}.streak-pill,.exam-countdown-pill{display:flex;align-items:center;gap:5px;color:var(--muted);font-size:.75rem}.streak-pill{padding:7px 10px;background:var(--orange-soft);border-radius:9px;color:var(--orange)}.streak-pill strong{color:var(--orange)}.streak-pill span{font-size:.68rem}.exam-countdown-pill{gap:8px;padding:7px 11px;background:var(--surface);border:1px solid var(--line);border-radius:9px}.exam-countdown-pill strong{color:var(--ink)}.icon-button,.small-icon-button{display:inline-grid;flex:0 0 auto;place-items:center;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:9px;transition:color .18s,background .18s,border-color .18s}.icon-button{width:36px;height:36px}.small-icon-button{width:34px;height:34px}.icon-button:hover,.small-icon-button:hover{color:var(--brand-3);background:var(--brand-soft);border-color:var(--brand-3)}.button{display:inline-flex;min-height:43px;align-items:center;justify-content:center;gap:9px;padding:11px 17px;border:1px solid transparent;border-radius:11px;font-size:.82rem;font-weight:750;line-height:1.2;text-align:center;transition:transform .16s,box-shadow .16s,background .16s,border-color .16s}.button:hover:not(:disabled){transform:translateY(-1px)}.button:active:not(:disabled){transform:translateY(0)}.button:disabled{opacity:.45}.button-primary{color:#fff;background:var(--brand-2);box-shadow:0 5px 13px #123c3521}.button-primary:hover:not(:disabled){background:var(--brand);box-shadow:0 7px 17px #123c352e}.button-accent{color:#273c31;background:var(--accent);box-shadow:0 6px 18px #00000021}.button-accent:hover:not(:disabled){background:#ffc875}.button-secondary{color:var(--brand-2);background:var(--surface);border-color:var(--line-strong)}:root[data-theme=dark] .button-secondary{color:var(--ink)}.button-secondary:hover:not(:disabled){background:var(--brand-soft);border-color:var(--brand-3)}.button-ghost{color:var(--muted);background:transparent}.button-ghost:hover{color:var(--ink);background:var(--surface-soft)}.button-ghost-light{color:#ffffffe0;background:#ffffff12;border-color:#ffffff38}.button-ghost-light:hover{background:#ffffff21}.button-small{min-height:36px;padding:8px 11px;font-size:.73rem}.text-link{display:inline-flex;align-items:center;gap:7px;color:var(--brand-3);font-size:.78rem;font-weight:750}.text-link:hover{color:var(--brand-2);gap:9px}.text-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:6px;color:var(--brand-3);font-size:.76rem;font-weight:700}.text-button:hover{text-decoration:underline}.text-button.danger{color:var(--red)}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.panel-heading,.section-heading{display:flex;align-items:center;justify-content:space-between;gap:15px}.panel-heading h2,.section-heading h2{margin:0;font-size:1.13rem}.page-header{display:flex;align-items:flex-end;justify-content:space-between;gap:25px;margin-bottom:26px}.page-header h1{margin:0 0 8px;font-size:clamp(1.75rem,3vw,2.3rem);line-height:1.15}.page-header p{max-width:720px;margin:0;color:var(--muted);font-size:.91rem}.page-actions{flex:0 0 auto}.progress-track{height:7px;overflow:hidden;background:var(--line);border-radius:999px}.progress-track>span{display:block;height:100%;background:var(--brand-3);border-radius:inherit;transition:width .5s ease}.progress-track.large{height:9px}.stat-icon{display:inline-grid;width:41px;height:41px;flex:0 0 auto;place-items:center;border-radius:12px}.stat-icon.green{color:var(--green);background:var(--green-soft)}.stat-icon.amber{color:var(--accent-ink);background:var(--accent-light)}.stat-icon.blue{color:var(--blue);background:var(--blue-soft)}.stat-icon.orange{color:var(--orange);background:var(--orange-soft)}.stat-icon.cream{color:var(--accent-ink);background:var(--accent-light)}.tone-1{color:#27755a!important;background:#e6f3ec!important}.tone-2{color:#8e5d19!important;background:#fff1d9!important}.tone-3{color:#426e8d!important;background:#e8f1f6!important}.tone-4{color:#8a5b75!important;background:#f5eaf1!important}:root[data-theme=dark] .tone-1{color:#8ed2af!important;background:#203d31!important}:root[data-theme=dark] .tone-2{color:#e9c381!important;background:#3a3325!important}:root[data-theme=dark] .tone-3{color:#9cc6de!important;background:#213641!important}:root[data-theme=dark] .tone-4{color:#d3a6bf!important;background:#392b35!important}.empty-state{max-width:620px;margin:60px auto;padding:50px 30px;text-align:center}.empty-state>.icon{margin:0 auto 16px;color:var(--brand-3)}.empty-state h1,.empty-state h2{margin-bottom:8px}.empty-state p{margin-bottom:20px;color:var(--muted)}.empty-inline{display:flex;grid-column:1 / -1;align-items:center;gap:10px;padding:25px;color:var(--muted);background:var(--surface);border:1px dashed var(--line-strong);border-radius:var(--radius)}.home-greeting{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:23px}.home-greeting h1{margin:0 0 4px;font-size:1.7rem}.home-greeting h1 span{display:inline-block;font-size:1.35rem;transform:rotate(-5deg)}.home-greeting p{margin:0;color:var(--muted);font-size:.87rem}.home-greeting .date-line{margin-bottom:3px;color:var(--muted-light);font-size:.68rem;font-weight:650;text-transform:capitalize}.home-hero{position:relative;display:grid;min-height:265px;grid-template-columns:minmax(0,1fr) 210px;align-items:center;gap:30px;padding:34px 37px;overflow:hidden;color:#fff;background:#123c35;border:1px solid rgba(255,255,255,.05);border-radius:var(--radius-lg);box-shadow:0 16px 30px #123c3524}.hero-decoration{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.hero-decoration:before{position:absolute;top:-170px;right:-50px;width:440px;height:440px;border:1px solid rgba(255,255,255,.07);border-radius:50%;content:""}.hero-decoration:after{position:absolute;right:110px;bottom:-210px;width:380px;height:380px;background:#ffffff05;border:1px solid rgba(255,255,255,.06);border-radius:50%;content:""}.hero-decoration span{position:absolute;right:30px;bottom:24px;width:85px;height:3px;background:#f3b85f4d;border-radius:5px;transform:rotate(-35deg)}.hero-decoration span:nth-child(2){right:7px;bottom:65px;width:50px}.hero-decoration span:nth-child(3){right:100px;bottom:4px;width:35px}.hero-content{position:relative;z-index:1}.hero-eyebrow{display:inline-flex;margin-bottom:20px;padding:5px 9px;color:#f6cb88;background:#f3b85f1a;border:1px solid rgba(243,184,95,.2);border-radius:6px;font-size:.62rem;font-weight:800;letter-spacing:.14em}.lesson-number{display:flex;align-items:center;gap:9px;margin-bottom:8px;color:#ffffff94;font-size:.62rem;font-weight:700;letter-spacing:.1em}.lesson-number span{width:3px;height:3px;background:var(--accent);border-radius:50%}.home-hero h2{max-width:660px;margin:0 0 8px;color:#fff;font-size:clamp(1.75rem,3.3vw,2.5rem);line-height:1.12}.home-hero .hero-content>p{max-width:570px;margin:0;color:#ffffffad;font-size:.9rem}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:25px}.hero-progress-card{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;padding-left:27px;border-left:1px solid rgba(255,255,255,.13);text-align:center}.progress-ring,.score-ring{display:grid;place-items:center;border-radius:50%}.progress-ring{width:122px;height:122px;background:conic-gradient(var(--accent) var(--progress),rgba(255,255,255,.1) 0)}.progress-ring:before{position:absolute;width:101px;height:101px;background:#123c35;border-radius:50%;content:""}.progress-ring>div{position:relative;display:flex;flex-direction:column}.progress-ring strong{color:#fff;font-size:1.7rem;line-height:1.1}.progress-ring span{margin-top:3px;color:#ffffff8c;font-size:.65rem}.hero-progress-card>p{margin:14px 0 3px;color:#ffffffb3;font-size:.73rem}.hero-progress-card>p strong{color:#fff}.hero-progress-card>span{max-width:165px;color:#ffffff6b;font-size:.61rem;line-height:1.5}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:17px 0}.stat-card{display:flex;align-items:center;gap:12px;min-width:0;padding:17px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-sm)}.stat-card>div{display:flex;min-width:0;flex-direction:column}.stat-card strong{color:var(--ink);font-size:1.27rem;line-height:1.1}.stat-card strong small{color:var(--muted-light);font-size:.72rem;font-weight:600}.stat-card div>span{margin-top:4px;overflow:hidden;color:var(--muted);font-size:.67rem;text-overflow:ellipsis;white-space:nowrap}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(250px,.75fr);gap:17px}.daily-panel{padding:23px}.goal-badge{padding:6px 9px;color:var(--brand-3);background:var(--brand-soft);border-radius:7px;font-size:.68rem;font-weight:750;white-space:nowrap}.daily-panel>.progress-track{margin:18px 0 7px}.mission-list{display:flex;flex-direction:column}.mission-item{display:flex;width:100%;align-items:center;gap:12px;padding:14px 2px;color:var(--ink);border-bottom:1px solid var(--line);text-align:left}.mission-item:last-child{padding-bottom:2px;border-bottom:0}.mission-item:hover>div strong{color:var(--brand-3)}.mission-item>div{display:flex;min-width:0;flex:1;flex-direction:column}.mission-item strong{font-size:.79rem;transition:color .15s}.mission-item div span{margin-top:3px;color:var(--muted);font-size:.67rem}.mission-item>.icon{color:var(--muted-light)}.mission-check{display:grid;width:31px;height:31px;flex:0 0 auto;place-items:center;color:var(--muted);background:var(--surface-soft);border:1px solid var(--line);border-radius:9px;font-size:.7rem;font-weight:750}.mission-check.done{color:var(--green);background:var(--green-soft);border-color:transparent}.mission-check.attention{color:var(--orange);background:var(--orange-soft);border-color:transparent}.exam-panel{padding:23px;background:var(--surface)}.exam-panel-top{display:flex;align-items:center;gap:10px;margin-bottom:17px}.exam-panel-top .eyebrow{margin:0}.exam-panel h2{margin:0 0 3px;font-size:1.35rem}.exam-panel>p{color:var(--muted);font-size:.72rem}.days-number{display:flex;align-items:baseline;gap:8px;margin:10px 0 17px;color:var(--brand-2);font-size:3.25rem;font-weight:800;letter-spacing:-.06em;line-height:1}:root[data-theme=dark] .days-number{color:var(--accent)}.days-number span{color:var(--muted);font-size:.69rem;font-weight:600;letter-spacing:0}.exam-facts{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:13px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.exam-facts>div{display:flex;align-items:center;gap:7px}.exam-facts strong{color:var(--ink);font-size:1.15rem}.exam-facts span{color:var(--muted);font-size:.6rem;line-height:1.3}.source-link{display:inline-flex;align-items:center;gap:5px;margin-top:14px;color:var(--muted);font-size:.65rem;font-weight:650}.source-link:hover{color:var(--brand-3)}.next-section{margin-top:25px}.next-section .section-heading{margin-bottom:13px}.lesson-mini-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.lesson-mini-card{display:flex;min-width:0;align-items:flex-start;gap:12px;padding:17px;background:var(--surface);border:1px solid var(--line);border-radius:14px;transition:transform .17s,border-color .17s,box-shadow .17s}.lesson-mini-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-md)}.lesson-mini-icon{display:grid;width:39px;height:39px;flex:0 0 auto;place-items:center;border-radius:11px}.lesson-mini-card>div{min-width:0;flex:1}.lesson-mini-card div>span{color:var(--muted-light);font-size:.56rem;font-weight:750;letter-spacing:.08em}.lesson-mini-card h3{margin:4px 0;overflow:hidden;font-size:.85rem;text-overflow:ellipsis;white-space:nowrap}.lesson-mini-card p{display:-webkit-box;margin:0;overflow:hidden;color:var(--muted);font-size:.65rem;line-height:1.45;-webkit-box-orient:vertical;-webkit-line-clamp:2}.lesson-mini-card>.icon{align-self:center;color:var(--muted-light)}.trail-progress{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:17px;padding:17px 20px}.trail-progress-copy{display:flex;align-items:center;gap:12px}.trail-progress-copy>div{display:flex;flex-direction:column}.trail-progress-copy strong{font-size:.82rem}.trail-progress-copy span{margin-top:2px;color:var(--muted);font-size:.7rem}.trail-progress-bar{display:flex;min-width:250px;align-items:center;gap:12px}.trail-progress-bar strong{color:var(--brand-3);font-size:.8rem}.trail-progress-bar .progress-track{flex:1}.search-box{display:flex;align-items:center;gap:10px;margin-bottom:28px;padding:0 15px;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:12px}.search-box:focus-within{border-color:var(--brand-3);box-shadow:0 0 0 3px var(--brand-soft)}.search-box input{width:100%;height:45px;color:var(--ink);background:transparent;border:0;outline:0;font-size:.8rem}.search-box input::placeholder{color:var(--muted-light)}.search-box kbd{padding:3px 6px;color:var(--muted-light);background:var(--surface-soft);border:1px solid var(--line);border-radius:5px;font-family:inherit;font-size:.56rem}.stage-section{margin-bottom:28px}.stage-heading{display:flex;align-items:flex-start;gap:13px;margin-bottom:13px}.stage-heading>span{margin-top:3px;padding:4px 7px;color:var(--brand-3);background:var(--brand-soft);border-radius:5px;font-size:.55rem;font-weight:800;letter-spacing:.08em}.stage-heading h2{margin:0 0 2px;font-size:1.07rem}.stage-heading p{margin:0;color:var(--muted);font-size:.7rem}.lesson-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.lesson-card{position:relative;padding:20px;overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow-sm);transition:border-color .17s,transform .17s,box-shadow .17s}.lesson-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-md)}.lesson-card.completed{border-color:color-mix(in srgb,var(--green) 30%,var(--line))}.lesson-card-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:13px}.lesson-card-number{display:grid;width:40px;height:40px;place-items:center;border-radius:11px;font-size:.75rem;font-weight:800}.lesson-card-meta{display:flex;align-items:center;gap:11px;color:var(--muted);font-size:.63rem}.lesson-card-meta>span{display:flex;align-items:center;gap:4px}.bookmarked{color:var(--accent-ink)}.lesson-card h3{margin:0 0 6px;font-size:1.01rem}.lesson-card>p{min-height:39px;margin:0 0 16px;color:var(--muted);font-size:.73rem;line-height:1.5}.lesson-card-bottom{display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid var(--line)}.best-score{position:absolute;top:0;right:0;padding:4px 10px;color:var(--green);background:var(--green-soft);border-radius:0 14px 0 9px;font-size:.56rem;font-weight:700}.lesson-view{max-width:1210px;margin:0 auto}.breadcrumb{display:flex;align-items:center;gap:7px;margin-bottom:17px;color:var(--muted);font-size:.69rem}.breadcrumb a:hover{color:var(--brand-3)}.lesson-header{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:24px;padding:25px 27px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}.lesson-header-main{display:flex;align-items:center;gap:18px}.lesson-big-icon{display:grid;width:62px;height:62px;flex:0 0 auto;place-items:center;border-radius:17px}.lesson-header h1{margin:0 0 5px;font-size:clamp(1.55rem,3vw,2rem)}.lesson-header p{margin:0;color:var(--muted);font-size:.82rem}.bookmark-button{display:inline-flex;flex:0 0 auto;align-items:center;gap:7px;padding:9px 11px;color:var(--muted);border:1px solid var(--line);border-radius:9px;font-size:.72rem;font-weight:650}.bookmark-button:hover,.bookmark-button.active{color:var(--accent-ink);background:var(--accent-light);border-color:var(--accent)}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 265px;align-items:start;gap:20px}.lesson-article{min-width:0;padding:30px 36px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.lesson-intro{display:flex;align-items:flex-start;gap:13px;margin-bottom:8px;padding:18px 20px;color:var(--brand-3);background:var(--brand-soft);border-radius:12px}.lesson-intro strong{display:block;margin-bottom:7px;color:var(--ink);font-size:.82rem}.lesson-intro ul{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:0;padding:0;list-style:none}.lesson-intro li{position:relative;padding-left:13px;color:var(--ink-soft);font-size:.68rem}.lesson-intro li:before{position:absolute;top:7px;left:0;width:5px;height:5px;background:var(--brand-3);border-radius:50%;content:""}.lesson-section{position:relative;padding:30px 0 30px 43px;border-bottom:1px solid var(--line)}.lesson-section:last-of-type{border-bottom:0}.section-number{position:absolute;top:32px;left:0;display:grid;width:27px;height:27px;place-items:center;color:var(--brand-3);background:var(--brand-soft);border-radius:8px;font-size:.67rem;font-weight:800}.lesson-section>h2{margin:0 0 18px;font-size:calc(1.25rem * var(--reader-scale));line-height:1.3}.lesson-text{font-size:calc(.96rem * var(--reader-scale));line-height:1.8}.lesson-text p{margin:0 0 14px;color:var(--ink-soft)}.lesson-text p:last-child{margin-bottom:0}.lesson-text strong{color:var(--ink);font-weight:750}.lesson-text ul,.lesson-text ol{margin:12px 0 16px;padding-left:22px;color:var(--ink-soft)}.lesson-text li{margin-bottom:9px;padding-left:4px}.lesson-text li::marker{color:var(--brand-3);font-weight:700}.lesson-text mark{padding:0 3px;color:inherit;background:var(--accent-light);border-radius:3px}.callout{margin:17px 0;padding:14px 16px;color:var(--ink-soft);background:var(--surface-soft);border-left:3px solid var(--brand-3);border-radius:0 10px 10px 0;font-size:.88em;line-height:1.65}.callout.tip{background:var(--blue-soft);border-left-color:var(--blue)}.callout.warning{background:var(--accent-light);border-left-color:var(--accent)}.callout.success{background:var(--green-soft);border-left-color:var(--green)}.example-box{min-width:0;margin:16px 0;padding:16px 18px;background:var(--surface-soft);border:1px solid var(--line);border-radius:11px}.example-box p{margin-bottom:8px}.example-box ul{margin-bottom:0}.example-label{display:inline-block;margin-bottom:8px;color:var(--muted);font-size:.61rem;font-weight:800;letter-spacing:.09em;text-transform:uppercase}.example-box.right{background:var(--green-soft);border-color:color-mix(in srgb,var(--green) 25%,var(--line))}.example-box.right .example-label{color:var(--green)}.example-box.wrong{background:var(--red-soft);border-color:color-mix(in srgb,var(--red) 22%,var(--line))}.example-box.wrong .example-label{color:var(--red)}.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.compare-grid .example-box{margin:14px 0}.mini-table{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;margin:16px 0;overflow:hidden;background:var(--line);border:1px solid var(--line);border-radius:11px}.mini-table>div{display:flex;min-width:0;flex-direction:column;gap:4px;padding:13px 15px;background:var(--surface-soft)}.mini-table strong{color:var(--brand-3);font-size:.86em}.mini-table span{color:var(--ink-soft);font-size:.8em;line-height:1.5}.step-list{padding-left:0!important;list-style:none;counter-reset:study-step}.step-list li{position:relative;padding-left:35px;counter-increment:study-step}.step-list li:before{position:absolute;top:2px;left:0;display:grid;width:23px;height:23px;place-items:center;color:var(--brand-3);background:var(--brand-soft);border-radius:6px;content:counter(study-step);font-size:.66rem;font-weight:800}.lesson-summary{display:flex;align-items:flex-start;gap:16px;margin:27px 0 18px;padding:22px;background:var(--accent-light);border:1px solid color-mix(in srgb,var(--accent) 40%,var(--line));border-radius:13px}.summary-icon{display:grid;width:44px;height:44px;flex:0 0 auto;place-items:center;color:var(--accent-ink);background:color-mix(in srgb,var(--accent) 28%,transparent);border-radius:12px}.lesson-summary .eyebrow{color:var(--accent-ink)}.lesson-summary h2{margin:0 0 6px;font-size:1.1rem}.lesson-summary p{margin:0;color:var(--ink-soft);font-size:.82rem;line-height:1.65}.lesson-complete-card{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:24px;color:#fff;background:#123c35;border-radius:14px}.lesson-complete-card .eyebrow{color:var(--accent)}.lesson-complete-card h2{margin:0 0 5px;color:#fff;font-size:1.12rem}.lesson-complete-card p{max-width:430px;margin:0;color:#fff9;font-size:.73rem}.lesson-complete-card .button{flex:0 0 auto;color:#263d33;background:var(--accent)}.previous-score{display:flex;align-items:center;gap:6px;margin-top:10px;color:#a8d9c1;font-size:.66rem}.lesson-prev-next{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:20px}.lesson-prev-next .text-link:last-child{text-align:right}.lesson-aside{position:sticky;top:90px;display:flex;flex-direction:column;gap:12px}.aside-card{padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:13px}.aside-card nav{display:flex;flex-direction:column;gap:3px}.aside-card nav a{display:flex;align-items:flex-start;gap:8px;padding:8px 5px;color:var(--muted);border-radius:7px;font-size:.66rem;line-height:1.4}.aside-card nav a:hover{color:var(--brand-3);background:var(--surface-soft)}.aside-card nav a>span{display:grid;width:18px;height:18px;flex:0 0 auto;place-items:center;color:var(--brand-3);background:var(--brand-soft);border-radius:5px;font-size:.55rem;font-weight:750}.reader-settings>div{display:flex;align-items:center;justify-content:space-between;gap:10px}.reader-settings strong{font-size:.8rem}.reader-settings p{margin:10px 0 0;color:var(--muted);font-size:.63rem}.aside-tip{display:flex;align-items:flex-start;gap:10px;color:var(--accent-ink);background:var(--accent-light);border-color:color-mix(in srgb,var(--accent) 30%,var(--line))}.aside-tip p{margin:0;color:var(--ink-soft);font-size:.66rem;line-height:1.55}.aside-tip strong{display:block;margin-bottom:4px;color:var(--ink);font-size:.71rem}.practice-mode-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:14px}.practice-mode{position:relative;display:flex;min-width:0;flex-direction:column;align-items:flex-start;padding:23px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.practice-mode.recommended{color:#fff;background:#123c35;border-color:#123c35}.mode-icon{display:grid;width:48px;height:48px;place-items:center;margin-bottom:17px;color:var(--brand-3);background:var(--brand-soft);border-radius:13px}.mode-icon.blue{color:var(--blue);background:var(--blue-soft)}.mode-icon.amber{color:var(--accent-ink);background:var(--accent-light)}.recommended .mode-icon{color:var(--accent);background:#ffffff14}.mode-tag{position:absolute;top:20px;right:20px;padding:4px 7px;color:var(--accent);background:#f3b85f1a;border-radius:5px;font-size:.54rem;font-weight:800;letter-spacing:.1em}.practice-mode h2{margin:0 0 7px;font-size:1.12rem}.practice-mode.recommended h2{color:#fff}.practice-mode>p{min-height:57px;margin:0 0 14px;color:var(--muted);font-size:.73rem;line-height:1.55}.practice-mode.recommended>p{color:#ffffff9e}.mode-meta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:18px;color:var(--muted);font-size:.62rem}.mode-meta span{display:flex;align-items:center;gap:5px}.recommended .mode-meta{color:#ffffff8c}.practice-mode .button{width:100%;margin-top:auto}.exercise-summary-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin:17px 0 28px;overflow:hidden;background:var(--line);border:1px solid var(--line);border-radius:13px}.exercise-summary-strip>div,.exercise-summary-strip>a{display:flex;align-items:center;justify-content:center;gap:10px;padding:12px 18px;background:var(--surface)}.exercise-summary-strip .stat-icon{width:33px;height:33px;border-radius:9px}.exercise-summary-strip p{margin:0;color:var(--muted);font-size:.7rem}.exercise-summary-strip p strong{color:var(--ink)}.exercise-summary-strip a:hover{background:var(--surface-soft)}.topic-practice .section-heading{margin-bottom:13px}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.topic-card{display:flex;min-width:0;align-items:center;gap:10px;padding:14px;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:12px;text-align:left;transition:border-color .16s,transform .16s}.topic-card:hover{transform:translateY(-1px);border-color:var(--brand-3)}.topic-icon{display:grid;width:36px;height:36px;flex:0 0 auto;place-items:center;border-radius:10px}.topic-card>div{display:flex;min-width:0;flex:1;flex-direction:column}.topic-card strong{overflow:hidden;font-size:.72rem;text-overflow:ellipsis;white-space:nowrap}.topic-card div>span{margin-top:3px;overflow:hidden;color:var(--muted);font-size:.58rem;text-overflow:ellipsis;white-space:nowrap}.topic-play{display:grid;width:26px;height:26px;flex:0 0 auto;place-items:center;color:var(--muted-light);background:var(--surface-soft);border-radius:50%}.topic-card:hover .topic-play{color:#fff;background:var(--brand-3)}.question-view{max-width:900px;margin:0 auto}.question-topbar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:15px;margin-bottom:15px}.question-topbar>div:nth-child(2){display:flex;flex-direction:column;align-items:center}.question-topbar .eyebrow{max-width:300px;margin-bottom:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.question-topbar>div:nth-child(2)>strong{font-size:.77rem}.question-score,.timer{display:flex;align-items:center;justify-self:end;gap:6px;padding:7px 10px;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:8px;font-size:.69rem}.timer{color:var(--brand-3);font-variant-numeric:tabular-nums;font-weight:750}.timer.urgent{color:var(--red);background:var(--red-soft)}.question-progress{height:5px}.question-dots{display:flex;justify-content:center;gap:5px;margin:12px 0 20px}.question-dots span{width:6px;height:6px;background:var(--line-strong);border-radius:50%}.question-dots span.current{width:19px;background:var(--brand-3);border-radius:5px}.question-dots span.done{background:var(--green)}.question-dots span.answered:not(.current){background:var(--accent)}.question-card{padding:30px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.question-label{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:20px;color:var(--muted);font-size:.63rem}.question-label span:first-child{padding:4px 7px;color:var(--brand-3);background:var(--brand-soft);border-radius:5px;font-weight:800;letter-spacing:.08em}.question-context{margin-bottom:18px;padding:17px 19px;color:var(--ink-soft);background:var(--surface-soft);border-left:3px solid var(--accent);border-radius:0 10px 10px 0;font-size:.93rem;line-height:1.75}.question-card>h1{margin:0 0 22px;font-size:1.12rem;line-height:1.5;letter-spacing:-.012em}.answer-list{display:flex;flex-direction:column;gap:9px}.answer-option{display:flex;width:100%;min-height:54px;align-items:center;gap:13px;padding:10px 14px;color:var(--ink-soft);background:var(--surface);border:1px solid var(--line);border-radius:11px;text-align:left;transition:background .15s,border-color .15s,transform .15s}.answer-option:hover:not(:disabled){transform:translate(2px);background:var(--surface-soft);border-color:var(--brand-3)}.answer-option:disabled{opacity:1}.option-letter{display:grid;width:31px;height:31px;flex:0 0 auto;place-items:center;color:var(--muted);background:var(--surface-soft);border:1px solid var(--line);border-radius:8px;font-size:.72rem;font-weight:800}.option-text{flex:1;font-size:.82rem;line-height:1.5}.option-status{display:grid;width:24px;place-items:center}.answer-option.selected{background:var(--brand-soft);border-color:var(--brand-3);box-shadow:0 0 0 1px var(--brand-3)}.answer-option.selected .option-letter{color:#fff;background:var(--brand-3);border-color:var(--brand-3)}.answer-option.correct{color:var(--green);background:var(--green-soft);border-color:var(--green);box-shadow:none}.answer-option.correct .option-letter{color:#fff;background:var(--green);border-color:var(--green)}.answer-option.incorrect{color:var(--red);background:var(--red-soft);border-color:var(--red);box-shadow:none}.answer-option.incorrect .option-letter{color:#fff;background:var(--red);border-color:var(--red)}.answer-feedback{margin-top:20px;padding:19px;border-radius:12px;outline:0}.answer-feedback.correct{background:var(--green-soft);border:1px solid color-mix(in srgb,var(--green) 30%,var(--line))}.answer-feedback.incorrect{background:var(--red-soft);border:1px solid color-mix(in srgb,var(--red) 25%,var(--line))}.feedback-heading{display:flex;align-items:flex-start;gap:10px}.answer-feedback.correct .feedback-heading>.icon{color:var(--green)}.answer-feedback.incorrect .feedback-heading>.icon{color:var(--red)}.feedback-heading>div{display:flex;flex-direction:column}.feedback-heading strong{font-size:.85rem}.feedback-heading span{margin-top:2px;color:var(--muted);font-size:.69rem}.answer-feedback>p{margin:14px 0 10px;color:var(--ink-soft);font-size:.79rem;line-height:1.65}.feedback-tip{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:.63rem}.question-footer{display:flex;min-height:68px;align-items:center;justify-content:space-between;gap:15px;padding:14px 2px 0}.keyboard-hint{color:var(--muted-light);font-size:.65rem}.simulado-actions{display:flex;align-items:center;gap:10px}.results-view{max-width:900px;margin:0 auto}.results-hero{position:relative;display:flex;align-items:center;gap:25px;padding:30px;overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg)}.score-ring{position:relative;width:133px;height:133px;flex:0 0 auto;background:conic-gradient(var(--brand-3) var(--score),var(--line) 0)}.score-ring:before{position:absolute;width:109px;height:109px;background:var(--surface);border-radius:50%;content:""}.score-ring>div{position:relative;display:flex;flex-direction:column;align-items:center}.score-ring strong{color:var(--ink);font-size:1.8rem}.score-ring span{color:var(--muted);font-size:.63rem}.results-hero h1{margin:0 0 6px;font-size:1.55rem}.results-hero p{margin:0;color:var(--muted);font-size:.8rem}.result-numbers{display:flex;flex-wrap:wrap;gap:15px;margin-top:17px}.result-numbers span{display:flex;align-items:center;gap:5px;color:var(--muted);font-size:.69rem}.result-numbers span:first-child>.icon{color:var(--green)}.result-numbers span:nth-child(2)>.icon{color:var(--red)}.result-numbers strong{color:var(--ink)}.result-trophy{position:absolute;right:25px;bottom:20px;color:var(--accent);opacity:.35;transform:rotate(-10deg)}.result-actions{display:flex;flex-wrap:wrap;gap:9px;margin:16px 0 28px}.answer-review .section-heading{margin-bottom:13px}.review-question{margin-bottom:9px;overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:12px}.review-question summary{display:flex;align-items:center;gap:11px;padding:15px 17px;cursor:pointer;list-style:none}.review-question summary::-webkit-details-marker{display:none}.review-result-icon{display:grid;width:31px;height:31px;flex:0 0 auto;place-items:center;border-radius:9px}.is-correct .review-result-icon{color:var(--green);background:var(--green-soft)}.is-wrong .review-result-icon{color:var(--red);background:var(--red-soft)}.review-question summary>div{display:flex;flex:1;flex-direction:column}.review-question summary strong{font-size:.76rem}.review-question summary div>span{margin-top:2px;color:var(--muted);font-size:.63rem}.summary-chevron{color:var(--muted);transition:transform .18s}details[open] .summary-chevron{transform:rotate(90deg)}.review-question-body{padding:0 20px 20px 59px}.review-context{padding:12px 14px;color:var(--ink-soft);background:var(--surface-soft);border-radius:8px;font-size:.74rem}.review-question-body h3{margin:15px 0;font-size:.85rem;line-height:1.5}.review-answers{display:grid;grid-template-columns:1fr 1fr;gap:8px}.review-answers p{margin:0;padding:10px 12px;border-radius:8px;font-size:.68rem}.correct-answer{color:var(--green);background:var(--green-soft)}.wrong-answer{color:var(--red);background:var(--red-soft)}.explanation-box{display:flex;align-items:flex-start;gap:9px;margin-top:12px;padding:12px 14px;color:var(--accent-ink);background:var(--accent-light);border-radius:8px}.explanation-box p{margin:0;color:var(--ink-soft);font-size:.72rem;line-height:1.6}.revision-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.error-notebook,.flashcard-panel{min-width:0;padding:23px}.error-notebook>p{margin:12px 0;color:var(--muted);font-size:.73rem}.error-list{margin:12px 0 16px}.error-item{display:flex;align-items:flex-start;gap:10px;padding:11px 0;border-bottom:1px solid var(--line)}.error-item:last-child{border-bottom:0}.error-item>div{min-width:0}.error-item strong{font-size:.7rem}.error-item p{margin:3px 0 0;overflow:hidden;color:var(--muted);font-size:.65rem;text-overflow:ellipsis;white-space:nowrap}.error-notebook .full-width,.flashcard-panel .full-width{margin-top:15px}.empty-compact{display:flex;flex-direction:column;align-items:center;padding:25px 8px 5px;text-align:center}.empty-compact>.icon{margin-bottom:11px;color:var(--green)}.empty-compact strong{font-size:.82rem}.empty-compact p{max-width:350px;margin:7px 0 12px;color:var(--muted);font-size:.7rem}.flashcard{position:relative;display:flex;min-height:220px;flex-direction:column;align-items:center;justify-content:center;margin-top:17px;padding:30px 25px 23px;background:var(--surface-soft);border:1px solid var(--line-strong);border-radius:14px;text-align:center}.flashcard:before{position:absolute;top:7px;right:-7px;bottom:-7px;left:7px;z-index:-1;background:var(--surface);border:1px solid var(--line);border-radius:14px;content:""}.flashcard-topic{position:absolute;top:12px;left:14px;color:var(--muted);font-size:.58rem;font-weight:650}.flashcard-label{margin-bottom:12px;color:var(--brand-3);font-size:.57rem;font-weight:800;letter-spacing:.13em}.flashcard>p{margin:0;color:var(--ink);font-size:.97rem;font-weight:650;line-height:1.55}.flashcard.revealed{background:var(--brand-soft);border-color:var(--brand-3)}.flashcard.revealed>p{font-size:.86rem;font-weight:500}.flashcard-hint{margin-top:17px;color:var(--muted-light);font-size:.59rem}.review-grade{margin-top:15px}.review-grade>span{display:block;margin-bottom:8px;color:var(--muted);font-size:.65rem;text-align:center}.review-grade>div{display:grid;grid-template-columns:1fr 1fr;gap:8px}.quick-summaries{margin-top:27px}.quick-summaries .section-heading{margin-bottom:13px}.summary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.summary-card{padding:0 16px;background:var(--surface);border:1px solid var(--line);border-radius:11px}.summary-card summary{display:flex;align-items:center;gap:10px;min-height:59px;cursor:pointer;list-style:none}.summary-card summary::-webkit-details-marker{display:none}.summary-card summary strong{flex:1;font-size:.75rem}.summary-card>p{margin:0 0 12px;color:var(--ink-soft);font-size:.73rem;line-height:1.65}.summary-card>.text-link{margin-bottom:16px;font-size:.67rem}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.settings-card{padding:23px}.settings-heading{display:flex;align-items:flex-start;gap:11px;margin-bottom:20px;color:var(--brand-3)}.settings-heading h2{margin:0 0 3px;font-size:1rem}.settings-heading p{margin:0;color:var(--muted);font-size:.67rem}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:15px}.field>span{color:var(--ink-soft);font-size:.7rem;font-weight:650}.field input,.field select{width:100%;height:42px;padding:0 12px;color:var(--ink);background:var(--surface-soft);border:1px solid var(--line);border-radius:9px;outline:0;font-size:.76rem}.field input:focus,.field select:focus{border-color:var(--brand-3);box-shadow:0 0 0 3px var(--brand-soft)}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:15px 0;border-top:1px solid var(--line)}.setting-row>div:first-child{display:flex;flex-direction:column}.setting-row strong{font-size:.73rem}.setting-row div>span{margin-top:3px;color:var(--muted);font-size:.63rem}.font-stepper{display:flex;flex-direction:row!important;gap:7px}.install-help{margin-top:15px;padding:12px 14px;background:var(--surface-soft);border-radius:9px}.install-help p{margin:0 0 8px;color:var(--muted);font-size:.66rem;line-height:1.55}.install-help p:last-child{margin-bottom:0}.install-help strong{color:var(--ink-soft)}.backup-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:17px}.backup-stats>div{display:flex;flex-direction:column;align-items:center;padding:12px 5px;background:var(--surface-soft);border-radius:9px}.backup-stats strong{color:var(--brand-3);font-size:1.1rem}.backup-stats span{color:var(--muted);font-size:.6rem}.progress-backup>.text-button{display:flex;margin:10px auto -6px}.about-content{margin-top:14px;padding:23px}.about-content>p{color:var(--ink-soft);font-size:.75rem;line-height:1.7}.about-meta{display:flex;flex-wrap:wrap;gap:15px;margin:16px 0;padding:13px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.about-meta span,.about-meta a{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:.67rem}.about-meta a{margin-left:auto;color:var(--brand-3);font-weight:700}.about-content .legal-note{margin:0;color:var(--muted-light);font-size:.61rem}.toast-region{position:fixed;right:22px;bottom:22px;z-index:100;display:flex;width:min(390px,calc(100vw - 32px));flex-direction:column;gap:8px;pointer-events:none}.toast{display:flex;align-items:flex-start;gap:10px;padding:14px 16px;color:var(--ink-soft);background:var(--surface-raised);border:1px solid var(--line-strong);border-radius:12px;box-shadow:var(--shadow-md);font-size:.75rem;line-height:1.5;opacity:0;transform:translateY(12px);transition:opacity .22s,transform .22s}.toast.visible{opacity:1;transform:translateY(0)}.toast>.icon{margin-top:1px;color:var(--brand-3)}.toast.success>.icon{color:var(--green)}.toast.error>.icon{color:var(--red)}@media(max-width:1180px){.main-content{padding-inline:24px}.home-hero{grid-template-columns:minmax(0,1fr) 175px;padding-inline:28px}.stats-grid{grid-template-columns:repeat(2,1fr)}.stat-card div>span{white-space:normal}.lesson-mini-grid{grid-template-columns:1fr}.lesson-mini-card p{-webkit-line-clamp:1}.practice-mode-grid{grid-template-columns:1fr 1fr}.practice-mode.recommended{grid-row:span 2}.topic-grid{grid-template-columns:repeat(2,1fr)}.lesson-layout{grid-template-columns:minmax(0,1fr) 230px}.lesson-article{padding-inline:27px}.lesson-intro ul{grid-template-columns:1fr}}@media(max-width:960px){.sidebar{display:none}.workspace{margin-left:0}.topbar{height:62px;padding:0 20px}.mobile-brand{display:flex;align-items:center;gap:8px}.mobile-brand .brand-mark{width:33px;height:33px}.mobile-brand strong{color:var(--brand);font-size:.95rem}:root[data-theme=dark] .mobile-brand strong{color:var(--ink)}.mobile-nav{position:fixed;inset:auto 0 0;z-index:40;display:grid;grid-template-columns:repeat(5,1fr);padding:7px max(8px,env(safe-area-inset-right)) calc(7px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));background:color-mix(in srgb,var(--surface) 95%,transparent);border-top:1px solid var(--line);box-shadow:0 -6px 24px #123c350f;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.mobile-nav .nav-item{min-height:48px;flex-direction:column;justify-content:center;gap:3px;padding:4px;border-radius:8px;font-size:.59rem}.mobile-nav .nav-item.active:before{inset:-7px auto auto 50%;width:22px;height:3px;border-radius:0 0 3px 3px;transform:translate(-50%)}.main-content{padding:24px 22px 100px}.dashboard-grid{grid-template-columns:1fr}.exam-panel{display:grid;grid-template-columns:1fr 1fr;column-gap:25px}.exam-panel-top,.exam-panel h2,.exam-panel>p{grid-column:1}.days-number{grid-column:1}.exam-facts{grid-column:2;grid-row:1 / 4;align-self:center}.source-link{grid-column:2;grid-row:4;align-self:end}.lesson-layout{grid-template-columns:1fr}.lesson-aside{display:none}.lesson-article{max-width:820px;margin:0 auto}.revision-grid{grid-template-columns:1fr}}@media(max-width:700px){.topbar{gap:8px;padding-inline:15px}.exam-countdown-pill{padding:6px 8px;font-size:.66rem}.streak-pill{display:none}.main-content{padding:20px 15px 95px}.page-header{align-items:flex-start;flex-direction:column;gap:14px;margin-bottom:20px}.page-header h1{font-size:1.75rem}.page-actions,.page-actions .button{width:100%}.home-greeting{align-items:flex-start}.home-greeting>.text-link{display:none}.home-greeting h1{font-size:1.45rem}.home-greeting p{font-size:.77rem}.home-hero{grid-template-columns:1fr;gap:22px;padding:26px 23px}.home-hero h2{font-size:1.8rem}.hero-progress-card{display:grid;grid-template-columns:auto 1fr;column-gap:16px;padding:18px 0 0;border-top:1px solid rgba(255,255,255,.13);border-left:0;text-align:left}.progress-ring{width:82px;height:82px;grid-row:span 2}.progress-ring:before{width:68px;height:68px}.progress-ring strong{font-size:1.2rem}.progress-ring span{font-size:.53rem}.hero-progress-card>p{align-self:end;margin:0 0 3px}.hero-progress-card>span{align-self:start;max-width:none}.hero-actions{flex-direction:column}.hero-actions .button{width:100%}.stats-grid{gap:9px;margin-block:12px}.stat-card{gap:9px;padding:13px}.stat-icon{width:35px;height:35px;border-radius:10px}.stat-card strong{font-size:1.05rem}.stat-card div>span{font-size:.59rem}.daily-panel,.exam-panel{padding:19px}.panel-heading h2,.section-heading h2{font-size:1rem}.mission-item strong{font-size:.74rem}.exam-panel{display:block}.exam-facts{border-bottom:1px solid var(--line)}.days-number{font-size:2.8rem}.section-heading{align-items:flex-end}.section-heading>.text-link{font-size:.67rem}.lesson-mini-card{padding:14px}.trail-progress{align-items:flex-start;flex-direction:column;gap:14px}.trail-progress-bar{width:100%;min-width:0}.search-box kbd{display:none}.lesson-card-grid{grid-template-columns:1fr}.lesson-card>p{min-height:0}.lesson-header{align-items:flex-start;padding:20px}.lesson-header-main{align-items:flex-start;gap:13px}.lesson-big-icon{width:48px;height:48px;border-radius:13px}.lesson-big-icon .icon{width:24px;height:24px}.lesson-header h1{font-size:1.4rem}.lesson-header p{font-size:.72rem}.bookmark-button{padding:8px}.bookmark-button span{display:none}.lesson-article{padding:20px 18px}.lesson-intro{padding:15px}.lesson-section{padding:25px 0 25px 34px}.section-number{top:27px;width:23px;height:23px}.lesson-section>h2{font-size:calc(1.12rem * var(--reader-scale))}.lesson-text{font-size:calc(1rem * var(--reader-scale));line-height:1.75}.compare-grid,.mini-table{grid-template-columns:1fr}.lesson-summary{padding:18px}.summary-icon{width:37px;height:37px}.lesson-complete-card{align-items:stretch;flex-direction:column;gap:17px;padding:20px}.lesson-prev-next{align-items:flex-start;flex-direction:column}.lesson-prev-next .text-link:last-child{text-align:left}.practice-mode-grid{grid-template-columns:1fr}.practice-mode.recommended{grid-row:auto}.practice-mode>p{min-height:0}.exercise-summary-strip{grid-template-columns:1fr}.exercise-summary-strip>div,.exercise-summary-strip>a{justify-content:flex-start}.topic-grid{grid-template-columns:1fr}.question-topbar{grid-template-columns:auto 1fr auto}.question-topbar>.text-link{font-size:0;gap:0}.question-topbar>div:nth-child(2){align-items:flex-start}.question-topbar .eyebrow{max-width:180px;font-size:.57rem}.question-score{font-size:0}.question-score .icon{width:18px}.question-card{padding:20px 16px;border-radius:16px}.question-label{align-items:flex-start}.question-label span:last-child{max-width:180px;text-align:right}.question-context{padding:14px;font-size:.84rem}.question-card>h1{font-size:1rem}.answer-option{gap:10px;padding:10px}.option-text{font-size:.77rem}.option-letter{width:29px;height:29px}.question-footer{align-items:stretch;flex-direction:column}.question-footer>div:first-child{display:none}.question-footer>.button{width:100%}.keyboard-hint{display:none}.simulado-actions{align-items:stretch;flex-direction:column}.simulado-actions .button{width:100%}.results-hero{align-items:flex-start;flex-direction:column;padding:23px}.score-ring{width:105px;height:105px}.score-ring:before{width:86px;height:86px}.results-hero h1{font-size:1.3rem}.result-trophy{display:none}.result-actions{flex-direction:column}.result-actions .button{width:100%}.review-question-body{padding:0 15px 17px}.review-answers{grid-template-columns:1fr}.error-notebook,.flashcard-panel{padding:19px}.summary-grid,.settings-grid{grid-template-columns:1fr}.settings-card,.about-content{padding:19px}.setting-row,.about-meta{align-items:flex-start;flex-direction:column}.about-meta a{margin-left:0}.toast-region{right:16px;bottom:85px}}@media(max-width:390px){.mobile-brand strong{display:none}.exam-countdown-pill{font-size:.61rem}.home-hero{padding-inline:19px}.stat-card{align-items:flex-start;flex-direction:column}.stat-card div>span{white-space:normal}.goal-badge{font-size:.6rem}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@media print{.sidebar,.topbar,.mobile-nav,.lesson-aside,.bookmark-button,.lesson-complete-card,.lesson-prev-next,.toast-region{display:none!important}.workspace{margin:0}.main-content{max-width:none;padding:0}.lesson-article{border:0;box-shadow:none}body{background:#fff;color:#000}}