.motion-on [data-reveal]{opacity:0;transform-origin:50% 100%;transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1);transition-delay:calc(var(--i,0) * 90ms);transform:perspective(900px)translateY(34px)rotateX(10deg)}.motion-on [data-reveal=flip]{transform:perspective(900px)translate3d(0,40px,-60px)rotateX(24deg)}.motion-on [data-reveal=lift]{transform:perspective(1100px)translate3d(0,60px,-120px)rotateX(16deg)scale(.94)}.motion-on [data-reveal=pop]{transform:perspective(700px)translateY(24px)scale(.9)}.motion-on [data-reveal].in{opacity:1;transform:none}.motion-on [data-reveal=line]{opacity:1}.hero-3d{--p:0;background:#fff;position:relative;overflow:hidden}.hero-3d .hero{z-index:1;position:relative}.hero-blob{pointer-events:none;border-radius:50%;position:absolute}.hero-blob.b1{background:radial-gradient(closest-side,#aac0f8bf,#aac0f800);width:560px;height:560px;top:-220px;right:-180px}.hero-blob.b2{background:radial-gradient(closest-side,#ffdca0cc,#ffdca000);width:440px;height:440px;bottom:-220px;left:-200px}@supports not (animation-timeline:scroll()){@media (hover:hover) and (pointer:fine){.hero-blob{will-change:transform}.hero-blob.b1{transform:translate3d(0, calc(var(--p) * 140px), 0)}.hero-blob.b2{transform:translate3d(0, calc(var(--p) * -90px), 0)}.hero-3d .hero-copy{transform:translate3d(0, calc(var(--p) * 60px), 0);opacity:calc(1 - var(--p) * .9)}}}.phone-stage{perspective:1200px;flex:380px;justify-content:center;min-width:0;padding:12px 0 24px;display:flex}.phone-3d{aspect-ratio:9/18.5;width:270px;transform-style:preserve-3d;will-change:transform;animation:5s ease-in-out infinite 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img{width:18px;height:18px}.ph-top b{color:var(--primary)}.ph-video{aspect-ratio:16/9;background:linear-gradient(135deg,#1a2340,#2348c9);border-radius:12px;justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden}.ph-video:after{content:"";background:var(--amber);width:38%;height:3px;position:absolute;bottom:0;left:0}.ph-play{background:#fff;border-radius:50%;justify-content:center;align-items:center;width:38px;height:38px;display:flex}.ph-kicker{letter-spacing:.06em;color:var(--primary-ink);font-size:9px;font-weight:800}.ph-title{color:var(--ink);font-size:13px;font-weight:800;line-height:1.3}.ph-bar{background:#e3e6eb;border-radius:6px;height:6px;overflow:hidden}.ph-bar span{background:var(--primary);border-radius:6px;width:62%;height:100%;display:block}.ph-card{border:1px solid 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(animation-timeline:scroll()){@media (hover:hover) and (pointer:fine){.ph-float.f1{transform:translateZ(70px) translate3d(0, calc(var(--p) * -50px), 0)}.ph-float.f2{transform:translateZ(110px) translate3d(0, calc(var(--p) * -90px), 0)}}}.ph-float.f1 .ic{background:var(--success-soft)}.ph-float.f2 .ic{background:var(--warn-soft)}@supports (animation-timeline:scroll()){.phone-3d{animation:5s ease-in-out infinite phone-float,linear both phone-turn;animation-timeline:auto,scroll(root);animation-range:normal,0 90vh}.ph-float.f1{animation:linear both float-f1;animation-timeline:scroll(root);animation-range:0 90vh}.ph-float.f2{animation:linear both float-f2;animation-timeline:scroll(root);animation-range:0 90vh}.hero-blob.b1{animation:linear both blob-down;animation-timeline:scroll(root);animation-range:0 100vh}.hero-blob.b2{animation:linear both blob-up;animation-timeline:scroll(root);animation-range:0 100vh}.hero-3d .hero-copy{animation:linear both 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.dot{width:40px;height:40px;font-size:14px;text-decoration:none}.mobile-top>.row{flex-wrap:wrap;justify-content:flex-end}.main{padding:20px 16px 96px}.bottomnav{border-top:1px solid var(--line);padding:6px 8px calc(10px + env(safe-area-inset-bottom));z-index:20;background:#fff;grid-template-columns:repeat(4,1fr);display:grid;position:fixed;bottom:0;left:0;right:0}.navbtn{min-height:52px;color:var(--muted);flex-direction:column;justify-content:center;align-items:center;gap:3px;font-size:11px;font-weight:700;text-decoration:none;display:flex}.navbtn[aria-current=page]{color:var(--primary)}}.page-title{font-size:28px;font-weight:800}.bar{background:var(--line);border-radius:999px;height:8px;overflow:hidden}.bar>div{background:var(--primary);border-radius:999px;height:100%;transition:width .4s}.dot.done{background:var(--success-soft);color:var(--success)}.dot.todo{color:var(--muted);background:#eef0f3}.dot.sm{width:30px;height:30px;font-size:13px}.continue-card{background:var(--navy);color:#fff;border-radius:18px;flex-direction:column;gap:12px;padding:26px;display:flex}.continue-card .bar{background:#34406a}.continue-card .bar>div{background:var(--amber)}.eyebrow{letter-spacing:.04em;font-size:12px;font-weight:800}.listrow{text-align:left;width:100%;color:var(--ink);background:0 0;border:0;border-bottom:1px solid #eef0f3;align-items:center;gap:14px;min-height:52px;padding:12px 0;font-size:15px;text-decoration:none;display:flex}.listrow:last-child{border-bottom:0}a.listrow:hover .lt{color:var(--primary-ink)}.listrow.is-current .lt{color:var(--primary-ink);font-weight:800}.statgrid{grid-template-columns:repeat(2,1fr);gap:12px;display:grid}.statgrid .card{padding:16px}.statgrid .num{color:var(--ink);font-size:26px;font-weight:800}.mod-card.is-current{border:2px solid var(--primary);padding:21px}.mod-card summary{cursor:pointer;list-style:none}.mod-card summary::-webkit-details-marker{display:none}.tracktabs{gap:8px;padding-bottom:4px;display:flex;overflow-x:auto}.lesson-video{aspect-ratio:16/9;border-radius:var(--radius-lg);background:var(--navy);width:100%;overflow:hidden}.lesson-video video{background:var(--navy);width:100%;height:100%;display:block}.tabs{background:#eef0f3;border-radius:10px;grid-auto-flow:column;align-self:flex-start;gap:4px;padding:4px;display:inline-grid}.tab{min-height:40px;color:var(--muted);cursor:pointer;background:0 0;border:none;border-radius:8px;padding:0 18px;font-family:inherit;font-size:14px;font-weight:700}.tab[aria-selected=true]{color:var(--ink);background:#fff;box-shadow:0 1px 2px #0000000f}.bullet{background:var(--primary);border-radius:50%;flex:none;width:6px;height:6px;margin-top:9px}.side-lesson{color:var(--body);border-radius:10px;align-items:center;gap:10px;min-height:44px;padding:10px 8px;font-size:14px;font-weight:600;text-decoration:none;display:flex}.side-lesson:hover{background:var(--bg)}.side-lesson[aria-current=page]{background:var(--primary-soft);color:var(--primary-ink);font-weight:800}.side-lesson.locked{color:var(--muted)}.option{border:1px solid var(--line-strong);cursor:pointer;text-align:left;width:100%;color:var(--ink);background:#fff;border-radius:12px;align-items:flex-start;gap:14px;padding:16px;font-family:inherit;font-size:15px;line-height:1.5;display:flex}.option .key{border:1.5px solid var(--line-strong);background:#fff;border-radius:50%;flex:none;justify-content:center;align-items:center;width:28px;height:28px;font-size:12px;font-weight:800;display:flex}.option[aria-checked=true]{border:2px solid var(--primary);background:var(--primary-soft);padding:15px}.option.correct{border:2px solid var(--success);background:var(--success-soft);padding:15px}.option.wrong{border:2px solid var(--error);background:var(--error-soft);padding:15px}.option:disabled{cursor:default}.option .verdict{white-space:nowrap;margin-left:auto;font-size:13px;font-weight:800}.feedback{border:1px solid var(--line);border-radius:12px;align-items:flex-start;gap:12px;padding:14px;display:flex}.lesson-actions{border-top:1px solid var(--line);flex-wrap:wrap;justify-content:flex-end;gap:12px;padding-top:16px;display:flex}@media (width<=640px){.lesson-actions .btn{flex:100%}.page-title{font-size:24px}}.notes-list{padding:4px 18px}.note-item{border-bottom:1px solid #eef0f3;padding:14px 0}.note-item:last-child{border-bottom:0}@media (width<=430px){.mobile-top .wordmark span{display:none}}.clamp-3{-webkit-line-clamp:3;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.file-row{border:1px solid var(--line);border-radius:var(--radius-sm);padding:8px 12px}label.btn:focus-within{outline:3px solid var(--primary);outline-offset:2px}.answer-box{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);max-height:40vh;color:var(--ink);padding:14px;overflow-y:auto}.task-row{border-top:1px dashed var(--line-strong)}.verify-ok{background:var(--success-soft);border-radius:var(--radius);padding:14px}.admin-lesson-row{border-bottom:1px solid #eef0f3;padding:10px 0}.admin-lesson-row:last-child{border-bottom:0}.task-admin{background:var(--bg);border-radius:var(--radius);padding:12px 14px}.sticky-notice{z-index:5;position:sticky;top:0}.sticky-notice:empty{display:none}.editor-section{flex-direction:column;gap:14px;display:flex}.editor-section>h2{font-size:18px;font-weight:800}.list-edit-row{align-items:flex-start;gap:8px;display:flex}.q-card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;flex-direction:column;gap:12px;padding:16px;display:flex}.opt-row{align-items:center;gap:8px;display:flex}.opt-row .input{height:44px}.save-bar{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border-top:1px solid var(--line);z-index:5;background:#f5f6f8f2;padding:12px 0;position:sticky;bottom:0}.key-sm{border:1.5px solid var(--line-strong);border-radius:50%;flex:none;justify-content:center;align-items:center;width:26px;height:26px;font-size:12px;font-weight:800;display:inline-flex}.import-card{border:2px dashed var(--primary);background:var(--primary-soft)}.task-intro{background:var(--primary-soft);color:var(--ink);border-radius:12px;padding:14px 16px;line-height:1.6}.task-files{border:1px solid var(--line);border-radius:12px;padding:14px 16px}.task-files-title{color:var(--ink);font-size:15px;font-weight:800}.task-file{width:100%;min-height:52px;font:inherit;color:inherit;text-align:left;cursor:pointer;background:0 0;border:0;border-radius:10px;align-items:center;gap:12px;padding:6px 4px;display:flex}.task-file:hover{background:var(--bg)}.task-file:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.task-file-badge{background:var(--primary-soft);width:42px;height:42px;color:var(--primary-ink);border-radius:10px;flex:none;justify-content:center;align-items:center;font-size:11px;font-weight:800;display:inline-flex}.task-sec{border-top:1px solid var(--line)}.task-sec:last-child{border-bottom:1px solid var(--line)}.task-sec>summary{cursor:pointer;justify-content:space-between;align-items:center;gap:12px;min-height:52px;padding:6px 0;list-style:none;display:flex}.task-sec>summary::-webkit-details-marker{display:none}.task-sec>summary:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}.task-sec-title{letter-spacing:.03em;color:var(--ink);font-size:14px;font-weight:800}.task-chev{color:var(--muted);text-align:center;width:24px;font-size:20px;line-height:1;transition:transform .15s;transform:rotate(-90deg)}.task-sec[open] .task-chev{transform:none}.task-body{gap:10px;padding:0 0 16px;line-height:1.65;display:grid}.task-bullets{gap:6px;margin:0;padding-left:20px;display:grid}.task-steps{counter-reset:step;gap:12px;margin:0;padding:0;list-style:none;display:grid}.task-steps>li{counter-increment:step;min-height:28px;padding-left:38px;position:relative}.task-steps>li:before{content:counter(step);background:var(--primary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:26px;height:26px;font-size:13px;font-weight:800;display:flex;position:absolute;top:0;left:0}.task-steps .task-bullets{margin-top:6px}.task-checks{gap:2px;display:grid}.task-checks label{cursor:pointer;align-items:flex-start;gap:12px;min-height:44px;padding:8px 0;display:flex}.task-checks input{width:20px;height:20px;accent-color:var(--primary);flex:none;margin-top:2px}.file-inline{font:inherit;color:var(--primary);text-underline-offset:2px;cursor:pointer;overflow-wrap:anywhere;background:0 0;border:0;padding:0;font-weight:700;text-decoration:underline;display:inline}.ref-banner{background:var(--success-soft);color:var(--success-ink);text-align:center;padding:10px 0;font-size:14px}.wm-stack{flex-direction:column;align-items:flex-start;gap:1px;line-height:1.15;display:flex}.wm-powered{letter-spacing:.02em;color:var(--muted);white-space:nowrap;font-size:10.5px;font-weight:600}.wm-powered strong{color:var(--ink);font-weight:800}.wm-powered.light{color:#c9ced8;margin-top:4px}.wm-powered.light strong{color:#fff}.powered{color:var(--muted);font-size:13px;font-weight:600}.powered strong{color:var(--ink);font-weight:800}.powered.light{color:#c9ced8}.powered.light strong{color:#fff}.powered.lg{font-size:15px}.powered.pill-style{border:1px solid var(--line);background:#fff;border-radius:999px;align-self:flex-start;gap:4px;padding:6px 12px;display:inline-flex}.app-foot{justify-content:center;padding:28px 0 4px;display:flex}