:root{--bg:#060a13;--bg-2:#0a1120;--surface:#0e1728;--surface-2:#142036;--fg:#eaf2ff;--muted:#8ea2c2;--line:#223252;--accent:#1fe584;--accent-deep:#0c9a55;--accent-ink:#03170c;--accent-soft:rgba(31,229,132,.12);--red:#ff3b5c;--red-deep:#b81d3a;--red-soft:rgba(255,59,92,.14);--amber:#ffc93c;--amber-soft:rgba(255,201,60,.13);--blue:#45d4ff;--blue-soft:rgba(69,212,255,.12);--glow:0 0 0 1px rgba(31,229,132,.35),0 0 24px rgba(31,229,132,.25);--shadow:0 10px 30px rgba(0,0,0,.45);--f-display:"Anek Bangla","Chakra Petch",system-ui,sans-serif;--f-tech:"Chakra Petch","Anek Bangla",system-ui,sans-serif;--f-body:"Hind Siliguri",system-ui,-apple-system,"Segoe UI",sans-serif;color-scheme:dark}*{box-sizing:border-box}body,html{margin:0}body{background:radial-gradient(900px 500px at 85% -10%,rgba(31,229,132,.13),transparent 60%),radial-gradient(700px 420px at -10% 10%,rgba(255,59,92,.1),transparent 60%),linear-gradient(rgba(34,50,82,.28) 1px,transparent 1px) 0 0 /44px 44px,linear-gradient(90deg,rgba(34,50,82,.28) 1px,transparent 1px) 0 0 /44px 44px,var(--bg);background-attachment:fixed;color:var(--fg);font-family:var(--f-body);font-size:16px;line-height:1.65;min-height:100vh;display:flex;flex-direction:column}a{color:var(--accent)}button,input,select,textarea{font:inherit;color:inherit}h1,h2,h3{font-family:var(--f-display);line-height:1.2;text-wrap:balance;letter-spacing:-.01em}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}::selection{background:var(--accent);color:var(--accent-ink)}.top{position:-webkit-sticky;position:sticky;top:0;z-index:30;gap:14px;flex-wrap:wrap;padding:10px 22px;background:rgba(6,10,19,.82);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.brand,.top{display:flex;align-items:center}.brand{gap:10px;text-decoration:none;color:var(--fg);font-family:var(--f-tech)}.brand b{font-size:18px;letter-spacing:.02em}.brand b i{font-style:normal;color:var(--accent)}.brand small{color:var(--muted);font-size:11px;letter-spacing:.14em;text-transform:uppercase;display:block;line-height:1}.logo{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--accent),#0aa85a);color:var(--accent-ink);font:700 13px var(--f-tech);display:grid;place-items:center;box-shadow:var(--glow)}.top nav{display:flex;gap:4px;flex-wrap:wrap;margin-left:8px}.top nav a{color:var(--muted);text-decoration:none;font-weight:600;padding:6px 12px;border-radius:999px;font-size:14px}.top nav a:hover{color:var(--fg);background:var(--surface-2)}.hud{margin-left:auto;display:flex;align-items:center;gap:10px;font-family:var(--f-tech);font-size:13px;min-height:34px}.hud-rank{background:var(--surface-2);border:1px solid var(--line);border-radius:999px;padding:4px 12px;color:var(--muted);white-space:nowrap}.hud-rank b{color:var(--amber);margin-left:4px}.hud-xp{position:relative;display:flex;align-items:center;gap:8px}.hud-bar{width:90px;height:8px;border-radius:99px;background:var(--surface-2);overflow:hidden;border:1px solid var(--line)}.hud-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--blue));transition:width .5s}.hud-num{color:var(--fg);font-weight:600;white-space:nowrap}.hud-gain{position:absolute;right:0;top:-4px;color:var(--amber);font-weight:700;animation:gain 1.8s ease-out forwards;pointer-events:none}.hud-streak{background:var(--red-soft);border:1px solid rgba(255,59,92,.4);color:#ffb3c0;border-radius:999px;padding:4px 10px;font-weight:700;white-space:nowrap}@keyframes gain{0%{opacity:0;transform:translateY(8px) scale(.8)}20%{opacity:1;transform:translateY(-6px) scale(1.2)}to{opacity:0;transform:translateY(-26px)}}main{flex:1 1;width:100%;max-width:980px;margin:0 auto;padding:26px 16px 64px}main.wide{max-width:1280px}.foot{text-align:center;color:var(--muted);font-size:12px;padding:18px;border-top:1px solid var(--line);font-family:var(--f-tech);letter-spacing:.04em}.hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);grid-gap:20px;gap:20px;padding:18px 0 30px}.eyebrow,.hero{align-items:center}.eyebrow{display:inline-flex;gap:8px;font:600 12px var(--f-tech);letter-spacing:.16em;text-transform:uppercase;color:var(--accent);border:1px solid rgba(31,229,132,.4);background:var(--accent-soft);border-radius:999px;padding:5px 12px}.eyebrow:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);animation:pulse 1.6s infinite}.hero h1{font-size:clamp(34px,6vw,60px);margin:14px 0 12px;font-weight:700}.hero h1 .stroke{color:transparent;-webkit-text-stroke:1.5px var(--fg)}.hero h1 .hl{color:var(--accent);text-shadow:0 0 28px rgba(31,229,132,.45)}.hero p{color:var(--muted);font-size:18px;max-width:52ch;margin:0 0 18px}.hero-stats{display:flex;gap:10px;flex-wrap:wrap}.stat{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:8px 14px;font-size:13px;color:var(--muted)}.stat b{display:block;color:var(--fg);font:700 17px var(--f-tech)}.hero-bot{position:relative;display:grid;place-items:center;min-height:260px}.hero-bot:before{content:"";position:absolute;width:250px;height:250px;border-radius:50%;border:1px dashed rgba(31,229,132,.4);animation:spin 28s linear infinite}.hero-bot:after{content:"";position:absolute;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(31,229,132,.28),transparent 70%)}.hero-bot .robot{position:relative;z-index:1}.hero-say{z-index:2;top:6px;right:0;padding:7px 12px}.robot{display:inline-block;flex:none;animation:bob 3.2s ease-in-out infinite;filter:drop-shadow(0 10px 18px rgba(31,229,132,.28))}.robot img{width:100%;height:100%;object-fit:contain;display:block}.rb-think{animation:tilt 1.8s ease-in-out infinite}.rb-cheer{animation:hop .7s ease-in-out infinite}.rb-sad{filter:grayscale(.6) drop-shadow(0 8px 14px rgba(255,59,92,.3));animation-duration:5s}@keyframes bob{0%,to{transform:translateY(0)}50%{transform:translateY(-7px)}}@keyframes tilt{0%,to{transform:rotate(-5deg)}50%{transform:rotate(5deg) translateY(-3px)}}@keyframes hop{0%,to{transform:translateY(0) scale(1)}40%{transform:translateY(-12px) scale(1.04)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.45}}@keyframes spin{to{transform:rotate(1turn)}}.guide{display:flex;align-items:flex-end;gap:6px;margin:0 0 16px}.bubble{position:relative;background:var(--surface-2);border:1px solid var(--line);border-radius:16px 16px 16px 4px;padding:10px 14px;margin-bottom:14px;max-width:62ch;box-shadow:var(--shadow);animation:pop .35s ease-out}.bubble-name{display:block;font:700 11px var(--f-tech);letter-spacing:.14em;color:var(--accent);text-transform:uppercase}@keyframes pop{0%{opacity:0;transform:translateY(6px) scale(.97)}}.steps{display:flex;gap:8px;margin-bottom:18px;flex-wrap:wrap}.steps span{flex:1 1;min-width:110px;font:600 12px var(--f-tech);letter-spacing:.04em;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:8px 10px;position:relative;overflow:hidden}.steps span.on{color:var(--accent);border-color:rgba(31,229,132,.5);background:var(--accent-soft)}.steps span.on:after{content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;background:var(--accent);box-shadow:0 0 10px var(--accent)}.card{background:linear-gradient(180deg,var(--surface),var(--bg-2));border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:var(--shadow)}.card+.card{margin-top:16px}.card-h{display:flex;align-items:center;gap:12px;margin-bottom:14px}.card-h h2{margin:0;font-size:22px}.num{width:34px;height:34px;border-radius:10px;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font:700 15px var(--f-tech);flex:none;box-shadow:0 3px 0 var(--accent-deep)}.lead{color:var(--muted);margin:0 0 16px}label.f{display:block;font-weight:600;margin:14px 0 6px}label.f .req{color:var(--red)}input[type=number],input[type=password],input[type=text],input[type=url],select,textarea{width:100%;background:var(--bg-2);border:1.5px solid var(--line);border-radius:12px;padding:11px 13px}select{-webkit-appearance:auto;-moz-appearance:auto;appearance:auto}textarea{min-height:90px;resize:vertical}input::placeholder,textarea::placeholder{color:#5f7396}input:focus,select:focus,textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.chip{border:1px solid var(--line);background:var(--surface-2);border-radius:999px;padding:5px 12px;font-size:13px;cursor:pointer;color:var(--muted)}.chip:hover{border-color:var(--accent);color:var(--accent)}.opts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:8px;gap:8px}.opt{display:flex;gap:10px;align-items:flex-start;border:1.5px solid var(--line);border-radius:12px;padding:10px 12px;cursor:pointer;background:var(--bg-2);transition:transform .08s,border-color .15s}.opt:hover{transform:translateY(-1px)}.opt.on,.opt:hover{border-color:var(--accent)}.opt.on{background:var(--accent-soft);box-shadow:var(--glow)}.opt input{margin-top:5px;accent-color:var(--accent);flex:none}.opt small{display:block;font-size:12px;overflow-wrap:anywhere}.opt small,.sec-l{color:var(--muted)}.sec-l{font:600 12px var(--f-tech);letter-spacing:.12em;text-transform:uppercase;margin:20px 0 8px}.row2{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px}.choice{display:block;width:100%;text-align:left;border:solid var(--line);border-width:1.5px 1.5px 4px;border-radius:14px;padding:13px 16px;background:var(--bg-2);cursor:pointer;margin-bottom:9px;font-weight:500;transition:transform .08s,border-color .15s}.choice:hover:not(:disabled){border-color:var(--accent);transform:translateY(-1px)}.choice:active:not(:disabled){transform:translateY(2px);border-bottom-width:2px}.choice.on{color:var(--accent)}.choice.on,.choice.right{border-color:var(--accent);background:var(--accent-soft)}.choice.wrong{border-color:var(--red);background:var(--red-soft)}.btn{display:inline-flex;align-items:center;gap:7px;border:solid var(--line);border-width:1.5px 1.5px 4px;background:var(--surface-2);border-radius:12px;padding:8px 16px;cursor:pointer;font-weight:600;text-decoration:none;color:var(--fg);white-space:nowrap;transition:transform .08s,filter .15s}.btn:hover:not([disabled]){filter:brightness(1.15);transform:translateY(-1px)}.btn:active:not([disabled]){transform:translateY(2px);border-bottom-width:2px}.btn.pri{background:linear-gradient(180deg,#ff5873,var(--red));border-color:var(--red-deep);color:#fff;font-weight:700;box-shadow:0 0 22px rgba(255,59,92,.35)}.btn.go{background:linear-gradient(180deg,#46f09e,var(--accent));border-color:var(--accent-deep);color:var(--accent-ink);font-weight:700;box-shadow:0 0 22px rgba(31,229,132,.3)}.btn.lg{padding:13px 26px;font-size:18px;border-radius:14px}.btn.sm{padding:4px 11px;font-size:13px;border-bottom-width:3px}.btn.ghost{border-color:transparent;background:none;color:var(--muted)}.btn.danger{color:#ff8fa3}.btn[disabled]{opacity:.45;cursor:default;box-shadow:none}.actions{display:flex;gap:10px;align-items:center;justify-content:space-between;margin-top:20px;flex-wrap:wrap}.note{background:var(--amber-soft);border:1px solid rgba(255,201,60,.35);color:#ffe6a3;border-radius:12px}.info,.note{padding:10px 14px;font-size:14px}.info{background:var(--blue-soft);border:1px solid rgba(69,212,255,.3);color:#bfeeff;border-radius:12px}.err{background:var(--red-soft);border:1px solid rgba(255,59,92,.4);color:#ffb3c0;border-radius:12px;margin-top:12px}.err,.win{padding:10px 14px;font-size:14px}.win{background:var(--accent-soft);border:1px solid rgba(31,229,132,.45);color:#b9ffd9;border-radius:12px}.muted{color:var(--muted)}.small{font-size:13px}.bar{height:10px;background:var(--surface-2);border:1px solid var(--line);overflow:hidden}.bar,.bar>i{border-radius:99px}.bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--blue));transition:width .4s;box-shadow:0 0 12px rgba(31,229,132,.6)}.pill{display:inline-block;white-space:nowrap;border-radius:999px;padding:1px 10px;font:600 12px var(--f-tech);background:var(--surface-2);color:var(--muted);border:1px solid var(--line)}.pill.g{background:var(--accent-soft);color:var(--accent);border-color:rgba(31,229,132,.4)}.pill.b{background:var(--blue-soft);color:var(--blue);border-color:rgba(69,212,255,.35)}.pill.a{background:var(--amber-soft);color:var(--amber);border-color:rgba(255,201,60,.35)}.spin{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.25);border-top-color:currentcolor;border-radius:50%;animation:spin .8s linear infinite;vertical-align:-3px}code{background:var(--surface-2);border-radius:6px;padding:1px 6px;font-size:13px}pre{color:var(--fg)}.course{display:grid;grid-template-columns:320px minmax(0,1fr);grid-gap:20px;gap:20px;align-items:start}.toc{position:-webkit-sticky;position:sticky;top:76px;max-height:calc(100vh - 92px);overflow:auto;padding:16px}.toc h3{margin:16px 0 8px;font:600 12px var(--f-tech);letter-spacing:.12em;text-transform:uppercase;color:var(--amber)}.toc .node{display:flex;gap:10px;width:100%;text-align:left;border:0;background:none;padding:7px 8px;border-radius:10px;cursor:pointer;font-size:14px;color:var(--fg);position:relative;align-items:center}.toc .node:hover:not(:disabled){background:var(--surface-2)}.toc .node.on{background:var(--accent-soft);color:var(--accent);font-weight:600}.toc .node:disabled{color:var(--muted);cursor:default}.toc .node:not(:last-child):before{content:"";position:absolute;left:20px;top:32px;bottom:-8px;border-left:2px dotted var(--line)}.ck{width:26px;height:26px;flex:none;border-radius:50%;display:grid;place-items:center;font:700 12px var(--f-tech);background:var(--surface-2);border:2px solid var(--line);color:var(--muted);z-index:1}.ck.d{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);box-shadow:0 0 12px rgba(31,229,132,.6)}.node.on .ck:not(.d){border-color:var(--accent);color:var(--accent);box-shadow:var(--glow)}.ck.star{border-color:var(--amber);color:var(--amber)}.player{aspect-ratio:16/9;width:100%;border:1px solid var(--line);border-radius:16px;background:#000;box-shadow:var(--shadow)}.tabs{display:flex;gap:6px;margin:20px 0 16px;overflow-x:auto;padding-bottom:4px}.tabs button{border:1.5px solid var(--line);background:var(--bg-2);padding:7px 14px;cursor:pointer;color:var(--muted);border-radius:999px;white-space:nowrap;font-weight:600;font-size:14px}.tabs button:hover{color:var(--fg)}.tabs button.on{color:var(--accent-ink);background:var(--accent);border-color:var(--accent);box-shadow:0 0 16px rgba(31,229,132,.4)}.vlist{display:flex;flex-direction:column;gap:8px}.vitem{display:flex;gap:12px;align-items:center;border:1.5px solid var(--line);border-radius:12px;padding:8px;cursor:pointer;background:var(--bg-2);text-align:left;width:100%}.vitem.on{border-color:var(--accent);background:var(--accent-soft)}.vitem img{width:120px;height:68px;object-fit:cover;border-radius:8px;flex:none}.vitem b{display:block;font-size:14px;line-height:1.35}details summary{cursor:pointer;color:var(--muted)}.ebook{line-height:1.85}.ebook h2{font-size:24px;margin:4px 0 8px}.ebook h3{font-size:19px;margin:22px 0 6px;color:var(--accent)}.ebook .intro{background:var(--accent-soft);border-left:4px solid var(--accent);padding:12px 16px;border-radius:10px}.ebook .tips{background:var(--amber-soft);border:1px solid rgba(255,201,60,.3);border-radius:10px;padding:8px 14px}.ebook .sum{background:linear-gradient(135deg,rgba(31,229,132,.2),rgba(69,212,255,.12));border:1px solid rgba(31,229,132,.4);border-radius:14px;padding:12px 20px;margin-top:18px}.ebook dl{display:grid;grid-template-columns:1fr 2fr;grid-gap:6px 16px;gap:6px 16px}.ebook dt{font-weight:700;color:var(--blue)}.ebook dd{margin:0}.hl{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);align-items:flex-start}.hl:last-child{border-bottom:0}.fb{display:flex;gap:8px;flex-wrap:wrap}.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));grid-gap:14px;gap:14px}.grid-cards .card{margin:0}@media (max-width:900px){.course{grid-template-columns:minmax(0,1fr)}.toc{position:static;max-height:none}.hero{grid-template-columns:minmax(0,1fr)}.hero-bot{min-height:200px;order:-1}}@media (max-width:640px){.opts,.row2{grid-template-columns:minmax(0,1fr)}.top{padding:8px 14px;gap:8px}.brand small{display:none}.hud{width:100%;margin-left:0;justify-content:space-between}.hud-bar{width:70px}.card{padding:16px;border-radius:16px}.vitem img{width:96px;height:54px}.ebook dl{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){*,:after,:before{animation:none!important;transition:none!important}}@media print{body{background:#fff;color:#111}.foot,.noprint,.tabs,.toc,.top{display:none!important}.course{display:block}.card{box-shadow:none;border:0;background:#fff}.ebook h3{color:#0c7a43}.ebook .intro,.ebook .sum,.ebook .tips{background:#f2f7f4;border-color:#cfe3d7;color:#111}.ebook dt{color:#111}}main:has(.landing){max-width:none;padding:0}.l-wrap{width:100%;max-width:1160px;margin:0 auto;padding:0 20px}.l-hero{position:relative;overflow:hidden;padding:56px 0 84px;min-height:min(760px,calc(100vh - 58px));display:grid;align-items:center}.l-hero:before{content:"";inset:0;background:radial-gradient(rgba(255,255,255,.13) 1px,transparent 1.4px) 0 0 /22px 22px;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000,transparent 75%);mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000,transparent 75%)}.l-hero:before,.pglow{position:absolute;pointer-events:none}.pglow{left:var(--mx,70%);top:var(--my,30%);width:520px;height:520px;transform:translate(-50%,-50%);background:radial-gradient(circle,rgba(31,229,132,.16),transparent 62%);transition:left .25s ease-out,top .25s ease-out}.l-hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);grid-gap:24px;gap:24px;align-items:center}.l-hero h1{font-size:clamp(38px,6.4vw,76px);font-weight:800;margin:18px 0 16px;line-height:1.12}.l-hero h1 span{display:block}.hl{background:linear-gradient(90deg,var(--accent),var(--blue) 60%,var(--accent));background-size:200% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:sheen 5s linear infinite;filter:drop-shadow(0 0 22px rgba(31,229,132,.35));padding-bottom:.08em}@keyframes sheen{to{background-position:200% 0}}.l-hero p{color:var(--muted);font-size:19px;max-width:54ch;margin:0 0 24px}.l-cta{display:flex;gap:20px;align-items:center;flex-wrap:wrap}.l-more{color:var(--fg);font-weight:600;text-decoration:none;opacity:.85}.l-more:hover{color:var(--accent)}.rise{opacity:0;animation:rise .7s cubic-bezier(.2,.8,.2,1) forwards}@keyframes rise{0%{opacity:0;transform:translateY(26px);filter:blur(6px)}to{opacity:1;transform:none;filter:none}}.l-bot{position:relative;height:470px;display:grid;place-items:center}.orbit{position:absolute;border-radius:50%;border:1px dashed rgba(31,229,132,.35);animation:spin 30s linear infinite}.orbit.o1{width:340px;height:340px}.orbit.o2{width:440px;height:440px;border-color:rgba(255,59,92,.28);animation-duration:46s;animation-direction:reverse}.orbit:after{content:"";position:absolute;top:-5px;left:50%;width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 14px var(--accent)}.orbit.o2:after{background:var(--red);box-shadow:0 0 14px var(--red)}.live-robot{position:relative;width:100%;max-width:460px;height:430px;display:grid;place-items:center}.live-robot:before{content:"";position:absolute;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(31,229,132,.3),transparent 68%)}.lr-still{position:relative;height:330px;width:auto;animation:bob 3.2s ease-in-out infinite;filter:drop-shadow(0 16px 30px rgba(31,229,132,.3));transition:opacity .6s}.lr-still.hide{opacity:0}.live-robot iframe{position:absolute;inset:0;width:100%;height:100%;border:0;background:transparent;opacity:0;transition:opacity .8s;color-scheme:normal}.live-robot iframe.in{opacity:1}.hero-say{top:22px;right:4%;background:var(--fg);color:#0b1626;border-radius:14px 14px 14px 4px;padding:8px 13px;font-weight:600;font-size:14px;animation:bob 3.2s ease-in-out infinite}.fchip,.hero-say{position:absolute;z-index:3;box-shadow:var(--shadow)}.fchip{background:rgba(14,23,40,.9);border:1px solid var(--line);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-radius:999px;padding:6px 13px;font:600 13px var(--f-tech);animation:drift 6s ease-in-out infinite;white-space:nowrap}.fchip.f1{left:0;top:34%;color:var(--blue)}.fchip.f2{right:0;top:58%;color:var(--accent);animation-delay:-2s}.fchip.f3{left:12%;bottom:8%;color:var(--amber);animation-delay:-4s}@keyframes drift{0%,to{transform:translate(0)}50%{transform:translate(6px,-12px)}}.scroll-cue{bottom:22px;width:26px;height:42px;margin-left:-13px;border:2px solid var(--line);border-radius:14px}.scroll-cue,.scroll-cue i{position:absolute;left:50%}.scroll-cue i{top:8px;width:4px;height:8px;margin-left:-2px;border-radius:2px;background:var(--accent);animation:cue 1.6s infinite}@keyframes cue{0%{opacity:0;transform:translateY(0)}40%{opacity:1}to{opacity:0;transform:translateY(14px)}}.l-marq{padding:18px 0 46px}.l-kicker{text-align:center;font:600 12px var(--f-tech);letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin:0 0 16px}.marquee{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);margin-bottom:12px}.track{display:flex;gap:12px;width:max-content;animation:slide 38s linear infinite}.marquee.rev .track{animation-direction:reverse;animation-duration:46s}.marquee:hover .track{animation-play-state:paused}.track span{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:9px 20px;font:600 15px var(--f-tech);color:var(--fg);white-space:nowrap}.track span:nth-child(3n){border-color:rgba(31,229,132,.4);color:var(--accent)}.track span:nth-child(5n){border-color:rgba(255,59,92,.4);color:#ff8fa3}@keyframes slide{to{transform:translateX(calc(-50% - 6px))}}.l-sec{padding:64px 0}.l-pill{display:inline-block;font:600 12px var(--f-tech);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);border:1px solid rgba(31,229,132,.4);border-radius:999px;padding:4px 12px}.l-h2{font-size:clamp(28px,4.4vw,48px);font-weight:700;margin:14px 0 28px;max-width:20ch}.l-h2 em{font-style:normal;color:var(--accent)}.reveal{opacity:0;transform:translateY(34px);transition:opacity .7s cubic-bezier(.2,.8,.2,1),transform .7s cubic-bezier(.2,.8,.2,1)}.reveal.in{opacity:1;transform:none}.stack{display:grid;grid-gap:22px;gap:22px}.stack-card{position:-webkit-sticky;position:sticky;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-gap:28px;gap:28px;align-items:center;border-radius:26px;padding:34px;min-height:290px;color:#08111f;box-shadow:0 -10px 40px rgba(0,0,0,.45)}.stack-card h3{font-size:clamp(24px,3vw,34px);margin:10px 0 8px}.stack-card p{margin:0;font-size:17px;opacity:.85;max-width:44ch}.stack-tag{font:700 13px var(--f-tech);letter-spacing:.1em;background:rgba(8,17,31,.12);border-radius:999px;padding:4px 12px}.c-green{background:linear-gradient(135deg,#7df7b9,#1fe584)}.c-blue{background:linear-gradient(135deg,#a8ecff,#45d4ff)}.c-amber{background:linear-gradient(135deg,#ffe49a,#ffc93c)}.c-red{background:linear-gradient(135deg,#ffb0bd,#ff6b85)}.c-violet{background:linear-gradient(135deg,#d9c8ff,#a98bff)}.mock{background:#0b1626;color:var(--fg);border-radius:18px;padding:18px;box-shadow:0 18px 40px rgba(8,17,31,.35);transform:rotate(1.5deg);transition:transform .4s;font-size:14px}.stack-card:hover .mock{transform:rotate(0) scale(1.02)}.mock-input{background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-family:var(--f-tech);overflow:hidden}.type{display:inline-block;overflow:hidden;white-space:nowrap;border-right:2px solid var(--accent);width:0;vertical-align:bottom;animation:typing 5s steps(32) infinite}@keyframes typing{0%{width:0}55%,90%{width:32ch}to{width:0}}.mock-chips,.mock-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.mock i{font-style:normal;border:1px solid var(--line);border-radius:999px;padding:4px 11px;color:var(--muted);font-size:13px}.mock i.on{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600}.mock-tabs{margin:0 0 14px}.mock-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:8px;gap:8px}.mock-grid i{border-radius:10px;padding:9px 11px}.mock-q{font-weight:600;margin-bottom:10px}.mock-opt{border:1px solid var(--line);border-radius:10px;padding:8px 11px;margin-top:7px;color:var(--muted)}.mock-opt.ok{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}.mock-row{display:flex;align-items:center;gap:10px;padding:9px 4px;border-bottom:1px solid var(--line)}.mock-row:last-child{border-bottom:0}.mock-row b{width:26px;height:26px;border-radius:50%;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-size:12px;flex:none}.mock-row span{margin-left:auto;color:var(--muted);font-size:12px}.mock-row.dim{opacity:.5}.mock-bar,.mock-row.dim b{background:var(--surface-2)}.mock-bar{height:10px;border-radius:99px;overflow:hidden}.mock-bar span{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--blue));animation:fill 3s ease-out infinite}@keyframes fill{0%{transform:translateX(-100%)}40%,to{transform:none}}.mock-xp{margin-top:10px;color:var(--amber);font:600 13px var(--f-tech)}.tri{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:16px;gap:16px}.tri-card{position:relative;background:linear-gradient(180deg,var(--surface),var(--bg-2));border:1px solid var(--line);border-radius:22px;padding:26px;overflow:hidden}.tri-card:hover{border-color:rgba(31,229,132,.5);box-shadow:var(--glow)}.tri-card small{font:600 12px var(--f-tech);letter-spacing:.12em;color:var(--muted)}.tri-card h3{font-size:23px;margin:6px 0 8px}.tri-card p{margin:0;color:var(--muted)}.tri-ic{display:grid;place-items:center;width:52px;height:52px;border-radius:16px;background:var(--accent-soft);color:var(--accent);font-size:22px;margin-bottom:16px;border:1px solid rgba(31,229,132,.4)}.vs{display:grid;grid-template-columns:1fr 1fr;grid-gap:16px;gap:16px}.vs-card{border-radius:22px;padding:28px;border:1px solid var(--line);background:var(--surface);height:100%}.vs-card h3{margin:0 0 12px;font-size:22px}.vs-card ul{margin:0;padding:0;list-style:none;display:grid;grid-gap:10px;gap:10px;font-size:17px}.vs-card li{padding-left:30px;position:relative}.vs-card.off{color:var(--muted)}.vs-card.off li:before{content:"✕";position:absolute;left:0;color:var(--red);font-weight:700}.vs-card.on{border-color:rgba(31,229,132,.55);background:linear-gradient(160deg,rgba(31,229,132,.16),var(--surface));box-shadow:var(--glow)}.vs-card.on li:before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}.nums{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:14px;gap:14px}.num-card{border:1px solid var(--line);border-radius:20px;padding:22px;background:var(--surface);height:100%}.num-card b{display:block;font-family:var(--f-tech);font-weight:700;font-size:clamp(38px,5vw,58px);line-height:1;color:var(--accent);text-shadow:0 0 24px rgba(31,229,132,.4);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.num-card span{color:var(--muted);font-size:14px;display:block;margin-top:8px}.l-faq{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);grid-gap:30px;gap:30px;align-items:start}.faq{border-bottom:1px solid var(--line);padding:16px 2px}.faq summary{cursor:pointer;font-weight:600;font-size:18px;color:var(--fg);list-style:none;display:flex;justify-content:space-between;gap:12px}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";color:var(--accent);font:700 22px/1 var(--f-tech);transition:transform .25s}.faq[open] summary:after{transform:rotate(45deg)}.faq p{color:var(--muted);margin:10px 0 0;max-width:60ch}.l-final{padding:30px 20px 90px}.l-final-in{max-width:1120px;margin:0 auto;text-align:center;border-radius:30px;padding:46px 22px 52px;border:1px solid rgba(31,229,132,.4);background:radial-gradient(600px 300px at 50% 0,rgba(31,229,132,.22),transparent 70%),var(--surface)}.l-final-in h2{font-size:clamp(26px,4vw,44px);max-width:20ch;margin:10px auto 24px}@media (max-width:900px){.l-hero{padding:26px 0 70px;min-height:0}.l-hero-grid{grid-template-columns:minmax(0,1fr)}.l-bot{height:330px;order:-1}.lr-still{height:240px}.live-robot{height:300px}.orbit.o1{width:250px;height:250px}.orbit.o2{width:320px;height:320px}.stack-card{padding:24px;position:static}.l-faq,.stack-card,.tri,.vs{grid-template-columns:minmax(0,1fr)}.nums{grid-template-columns:1fr 1fr}.l-sec{padding:44px 0}.fchip.f1{left:2%;top:20%}.fchip.f2{right:2%}}@media (prefers-reduced-motion:reduce){.reveal,.rise{opacity:1;transform:none;filter:none}.type{width:32ch}}:root[data-theme=light]{--bg:#f3f7fb;--bg-2:#ffffff;--surface:#ffffff;--surface-2:#eef3f9;--fg:#0d1a2b;--muted:#55657d;--line:#d8e1ec;--accent:#0f9d58;--accent-deep:#0a6e3d;--accent-ink:#ffffff;--accent-soft:rgba(15,157,88,.1);--red:#e5203f;--red-deep:#a8122b;--red-soft:rgba(229,32,63,.09);--amber:#b77700;--amber-soft:rgba(255,186,0,.14);--blue:#0a7fb5;--blue-soft:rgba(10,127,181,.09);--glow:0 0 0 1px rgba(15,157,88,.35),0 6px 20px rgba(15,157,88,.14);--shadow:0 8px 26px rgba(16,38,70,.1);color-scheme:light}:root[data-theme=light] body{background:radial-gradient(900px 500px at 85% -10%,rgba(15,157,88,.12),transparent 60%),radial-gradient(700px 420px at -10% 10%,rgba(229,32,63,.07),transparent 60%),linear-gradient(rgba(16,38,70,.05) 1px,transparent 1px) 0 0 /44px 44px,linear-gradient(90deg,rgba(16,38,70,.05) 1px,transparent 1px) 0 0 /44px 44px,var(--bg)}:root[data-theme=light] .top{background:rgba(255,255,255,.85)}:root[data-theme=light] .l-hero:before{background-image:radial-gradient(rgba(16,38,70,.14) 1px,transparent 1.4px)}:root[data-theme=light] .note{color:#6b4a00}:root[data-theme=light] .info{color:#075a80}:root[data-theme=light] .err{color:#a8122b}:root[data-theme=light] .win{color:#0a6e3d}:root[data-theme=light] .hud-streak{color:var(--red)}:root[data-theme=light] .hero-say{background:var(--fg);color:#fff}:root[data-theme=light] .fchip{background:rgba(255,255,255,.92)}:root[data-theme=light] .mock{background:#0d1a2b;--fg:#eaf2ff;--muted:#8ea2c2;--line:#223252;--surface-2:#142036;color:#eaf2ff}:root[data-theme=light] .hl{filter:none}:root[data-theme=light] .btn.danger,:root[data-theme=light] .track span:nth-child(5n){color:var(--red)}:root[data-theme=light] input::placeholder,:root[data-theme=light] textarea::placeholder{color:#8a99b0}.brand{gap:0}.logo-img{height:40px;width:auto;display:block}.on-light,:root[data-theme=light] .on-dark{display:none}:root[data-theme=light] .on-light{display:block}.toggles{display:flex;align-items:center;gap:8px}.seg{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:3px;background:var(--surface-2)}.seg button{border:0;background:none;padding:3px 11px;border-radius:999px;cursor:pointer;font:600 13px var(--f-tech);color:var(--muted)}.seg button[aria-pressed=true]{background:var(--accent);color:var(--accent-ink)}.mode{width:36px;height:36px;display:grid;place-items:center;border-radius:50%;border:1px solid var(--line);background:var(--surface-2);color:var(--amber);cursor:pointer;transition:transform .35s}.mode:hover{transform:rotate(40deg)}:root[data-theme=light] .mode{color:#3b4c66}.cur-dot,.cur-ring{position:fixed;left:0;top:0;pointer-events:none;z-index:9999;border-radius:50%}.cur-dot{width:6px;height:6px;margin:-3px 0 0 -3px;background:var(--accent);box-shadow:0 0 10px var(--accent)}.cur-ring{width:34px;height:34px;margin:-17px 0 0 -17px;border:1.5px solid var(--accent);opacity:.6;transition:width .2s,height .2s,margin .2s,background .2s,opacity .2s}.cur-ring.big{width:54px;height:54px;margin:-27px 0 0 -27px;background:var(--accent-soft);opacity:.9}.cur-ring.press{width:24px;height:24px;margin:-12px 0 0 -12px}.card,.num-card,.tri-card,.vs-card{position:relative}.card:after,.num-card:after,.tri-card:after,.vs-card:after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;opacity:0;transition:opacity .3s;background:radial-gradient(260px circle at var(--sx,50%) var(--sy,50%),rgba(31,229,132,.12),transparent 70%)}.card:hover:after,.num-card:hover:after,.tri-card:hover:after,.vs-card:hover:after{opacity:1}.tilt-robot{position:relative;height:380px;aspect-ratio:356/520;cursor:pointer;display:grid;place-items:center}.tilt-robot img{position:relative;z-index:1;width:auto;transform:rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));transition:transform .25s ease-out;animation:bob 3.2s ease-in-out infinite;filter:drop-shadow(0 18px 30px rgba(31,229,132,.28));-webkit-user-select:none;-moz-user-select:none;user-select:none}.tilt-robot.hop img{animation:hop .7s ease-in-out}.tr-glow{width:280px;height:280px;background:radial-gradient(circle,rgba(31,229,132,.35),transparent 68%);transform:translate(var(--gx,0),var(--gy,0));transition:transform .3s ease-out}.tr-glow,.tr-shadow{position:absolute;border-radius:50%}.tr-shadow{bottom:-6px;width:150px;height:18px;background:rgba(0,0,0,.4);filter:blur(6px);animation:shadow 3.2s ease-in-out infinite}@keyframes shadow{0%,to{transform:scaleX(1);opacity:.9}50%{transform:scaleX(.8);opacity:.5}}:root[data-theme=light] .tr-shadow{background:rgba(16,38,70,.25)}.walker{position:fixed;height:0;z-index:40;pointer-events:none}.walk-line,.walker{left:0;right:0;bottom:0}.walk-line{position:absolute;height:3px;background:var(--line)}.walk-line i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--blue));box-shadow:0 0 10px var(--accent)}.walk-bot{position:absolute;bottom:3px;width:76px;height:108px;transition:left .35s ease-out}.walk-bot img{width:100%;height:100%;object-fit:contain;transform-origin:50% 100%;filter:drop-shadow(0 6px 10px rgba(0,0,0,.35))}.walk-bot.back img{transform:scaleX(-1)}.walk-bot.go img{animation:step .32s ease-in-out infinite}.walk-bot.go.back img{animation-name:stepback}@keyframes step{0%,to{transform:translateY(0) rotate(-4deg)}50%{transform:translateY(-6px) rotate(4deg)}}@keyframes stepback{0%,to{transform:scaleX(-1) translateY(0) rotate(-4deg)}50%{transform:scaleX(-1) translateY(-6px) rotate(4deg)}}.walk-say{position:absolute;bottom:100%;left:46px;width:max-content;max-width:min(300px,70vw);background:var(--surface);color:var(--fg);border:1px solid rgba(31,229,132,.5);border-radius:14px 14px 14px 4px;padding:8px 30px 8px 12px;font-size:14px;font-weight:600;box-shadow:var(--shadow);pointer-events:auto;animation:pop .3s ease-out}.walk-say.left{left:auto;right:46px;border-radius:14px 14px 4px 14px}.walk-say button{position:absolute;top:4px;right:6px;border:0;background:none;color:var(--muted);cursor:pointer;font-size:16px;line-height:1}@media (max-width:640px){.logo-img{height:32px}.toggles{margin-left:auto}.walk-bot{width:54px;height:78px}.walk-say{left:34px;font-size:13px}.walk-say.left{right:34px}.tilt-robot{height:250px}}@media print{.cur-dot,.cur-ring,.walker{display:none!important}}@media (max-width:640px){.top{row-gap:6px}.brand{order:1}.toggles{order:2}.top nav{order:3;margin-left:-8px}.hud{order:4;width:auto;margin-left:auto;gap:6px}.hud-bar,.hud-rank{display:none}.tilt-robot{height:240px}}.tilt-robot img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}.tilt-robot{width:233px;height:340px}@media (max-width:640px){.tilt-robot{width:164px;height:240px}}.rmap{position:relative;height:520vh;--sky-a:#0b1030;--sky-b:#2a1840;--far:#1a2142;--h2a:#1d3a33;--h2b:#10241f;--h1a:#234a33;--h1b:#0f2419;--tree:#0f2c22;--trunk:#3a2a1c;--river:#3b8fd6;--trail:#ffb547}:root[data-theme=light] .rmap{--sky-a:#8fd3ff;--sky-b:#ffe2b8;--far:#9fb7d6;--h2a:#8bcf8f;--h2b:#5fae6c;--h1a:#6fbf6a;--h1b:#3f9150;--tree:#2f7a46;--trunk:#6b4a2b;--river:#4aa8f0;--trail:#ff7a1a}.rmap-pin{position:-webkit-sticky;position:sticky;top:0;height:100vh;overflow:hidden}.rmap-scene{position:absolute;inset:0}.rmap-scene svg{width:100%;height:100%;display:block}.rmap-scene:after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(6,10,19,.85) 0,rgba(6,10,19,.35) 34%,transparent 55%),linear-gradient(180deg,var(--bg) 0,transparent 10%,transparent 88%,var(--bg) 100%)}:root[data-theme=light] .rmap-scene:after{background:linear-gradient(90deg,rgba(243,247,251,.9) 0,rgba(243,247,251,.45) 34%,transparent 55%),linear-gradient(180deg,var(--bg) 0,transparent 10%,transparent 88%,var(--bg) 100%)}.sky-a{stop-color:var(--sky-a)}.sky-b{stop-color:var(--sky-b)}.h1a{stop-color:var(--h1a)}.h1b{stop-color:var(--h1b)}.h2a{stop-color:var(--h2a)}.h2b{stop-color:var(--h2b)}.rm-far{fill:var(--far)}.rm-star{fill:#fff;animation:twinkle 3s ease-in-out infinite}:root[data-theme=light] .rm-star{display:none}.rm-moon{fill:#fff6d8;filter:drop-shadow(0 0 18px #fff3c4)}:root[data-theme=light] .rm-moon{fill:#ffd257;filter:drop-shadow(0 0 30px #ffcc33)}@keyframes twinkle{0%,to{opacity:.9}50%{opacity:.25}}.rm-river{fill:none;stroke:var(--river);stroke-width:22;stroke-linecap:round;opacity:.75;stroke-dasharray:14 10;animation:flow 2.4s linear infinite}@keyframes flow{to{stroke-dashoffset:-48}}.rm-bridge rect{fill:#7a5232;stroke:#4a3020;stroke-width:2}.rm-tree path{fill:var(--tree)}.rm-tree .rm-trunk{fill:var(--trunk)}.rm-tree{animation:sway 5s ease-in-out infinite;transform-box:fill-box;transform-origin:50% 100%}.rm-tree:nth-child(odd){animation-delay:-2s}@keyframes sway{0%,to{rotate:-1.5deg}50%{rotate:1.5deg}}.rm-trail-base{fill:none;stroke:rgba(255,255,255,.55);stroke-width:4;stroke-dasharray:2 12;stroke-linecap:round}:root[data-theme=light] .rm-trail-base{stroke:rgba(70,50,20,.45)}.rm-trail{fill:none;stroke:var(--trail);stroke-width:6;stroke-linecap:round}.rm-flag path:first-child{stroke:#e9eef7;stroke-width:3}.rm-flag path:last-child{fill:var(--red);animation:flag 1.2s ease-in-out infinite;transform-box:fill-box;transform-origin:0 50%}@keyframes flag{0%,to{transform:skewY(0)}50%{transform:skewY(-8deg)}}.rm-stones{fill:#4a5568;stroke:#2d3748;stroke-width:2}.rm-logs{stroke:#6b4a2b;stroke-width:4;stroke-linecap:round}.rm-ember{fill:#8892a6}.rm-flame{fill:#ffb547;filter:drop-shadow(0 0 6px #ff8a3d);animation:flicker .5s ease-in-out infinite alternate;transform-box:fill-box;transform-origin:50% 100%}.rm-camp.now .rm-flame{fill:#4dffa6;filter:drop-shadow(0 0 8px #1fe584)}@keyframes flicker{0%{transform:scale(1)}to{transform:scale(.9,1.12)}}.rm-flame-glow{animation:pulse 1.6s infinite}.rm-num{font:700 15px var(--f-tech);fill:#fff;paint-order:stroke;stroke:rgba(0,0,0,.6);stroke-width:3}.rm-camp:hover .rm-stones{stroke:var(--accent)}.rm-bot{position:absolute;width:clamp(64px,7vw,104px);aspect-ratio:356/520;transform:translate(-50%,-92%);transition:left .12s linear,top .12s linear;z-index:2;pointer-events:none}.rm-bot img{width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 0 16px rgba(31,229,132,.55)) drop-shadow(0 10px 10px rgba(0,0,0,.45));transform-origin:50% 100%}.rm-bot:before{content:"";position:absolute;left:50%;bottom:-10px;width:130%;height:22px;transform:translateX(-50%);border-radius:50%;background:radial-gradient(rgba(31,229,132,.45),transparent 70%)}.rm-bot.left img{transform:scaleX(-1)}.rm-bot.walking img{animation:step .34s ease-in-out infinite}.rm-bot.walking.left img{animation-name:stepback}.rm-say{bottom:100%;transform:translateX(-50%);margin-bottom:8px;width:max-content;max-width:240px;background:var(--fg);color:var(--bg);padding:6px 12px;border-radius:12px;font-weight:700;font-size:13px;box-shadow:var(--shadow);animation:pop .35s ease-out;text-align:center}.rm-say,.rm-say:after{position:absolute;left:50%}.rm-say:after{content:"";top:100%;margin-left:-6px;border:6px solid transparent;border-top:6px solid var(--fg)}.rmap-panel{position:relative;z-index:3;height:100%;max-width:1160px;margin:0 auto;padding:0 20px;display:flex;flex-direction:column;pointer-events:none}.rmap-panel>*{pointer-events:auto;max-width:460px}.rm-kicker{font:700 12px var(--f-tech);letter-spacing:.16em;text-transform:uppercase;color:var(--trail,#ffb547);color:#ffb547}:root[data-theme=light] .rm-kicker{color:#c25a00}.rm-card{animation:cardIn .45s cubic-bezier(.2,.8,.2,1)}@keyframes cardIn{0%{opacity:0;transform:translateY(18px);filter:blur(4px)}}.rm-tag{display:inline-block;margin-top:12px;font:700 12px var(--f-tech);letter-spacing:.08em;color:var(--accent)}.rm-card h2{font-size:clamp(28px,3.6vw,44px);margin:6px 0 10px}.rm-card p{color:var(--muted);font-size:17px;margin:0 0 14px}:root:not([data-theme=light]) .rm-card p{color:#c3cfe3}.rm-card ul{list-style:none;padding:0;margin:0;display:flex;gap:8px;flex-wrap:wrap}.rm-card li{border:1px solid rgba(31,229,132,.45);background:var(--accent-soft);color:var(--accent);border-radius:999px;padding:3px 12px;font-size:13px;font-weight:600}.rm-steps{display:flex;gap:6px;margin-top:22px}.rm-steps button{width:46px;height:5px;border:0;border-radius:99px;background:rgba(255,255,255,.25);cursor:pointer;padding:0;transition:background .3s,width .3s}:root[data-theme=light] .rm-steps button{background:rgba(13,26,43,.18)}.rm-steps button.done{background:#ffb547}.rm-steps button.on{background:var(--accent);width:64px;box-shadow:0 0 10px var(--accent)}.rm-hint{font-size:13px;color:var(--muted);margin-top:12px}@media (max-width:900px){.rmap{height:560vh}.rmap-panel{justify-content:flex-start;padding-top:74px}.rmap-panel>*{max-width:none}.rmap-scene:after{background:linear-gradient(180deg,var(--bg) 0,rgba(6,10,19,.85) 38%,transparent 62%,var(--bg) 100%)}:root[data-theme=light] .rmap-scene:after{background:linear-gradient(180deg,var(--bg) 0,rgba(243,247,251,.88) 38%,transparent 62%,var(--bg) 100%)}.rmap-scene svg{position:absolute;bottom:0;height:66%;top:auto}.rm-bot{width:58px}.rm-card p{font-size:15px}.rm-hint{display:none}}@media (prefers-reduced-motion:reduce){.rm-bot{transition:none}}.walker .walk-bot{transition:left .35s ease-out,transform .4s ease,opacity .4s}.walker.away .walk-bot{transform:translateY(130%);opacity:0}@media (max-width:900px){.rm-say{max-width:170px;font-size:12px;display:none}.rmap-scene svg{height:58%}}.rmap-scene:after,:root[data-theme=light] .rmap-scene:after{background:linear-gradient(180deg,var(--bg) 0,transparent 4%,transparent 95%,var(--bg) 100%)}.rmap-panel{justify-content:center}.rmap-panel>.rm-glass{max-width:400px;padding:22px 24px;border-radius:22px;background:rgba(8,13,28,.62);border:1px solid rgba(255,255,255,.12);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 20px 50px rgba(0,0,0,.4)}:root[data-theme=light] .rmap-panel>.rm-glass{background:rgba(255,255,255,.78);border-color:rgba(13,26,43,.1);box-shadow:0 20px 50px rgba(16,38,70,.16)}.rm-glass .rm-card h2{font-size:clamp(22px,2.4vw,30px);margin:4px 0 8px}.rm-glass .rm-card p{font-size:15px}.rm-glass .rm-steps{margin-top:16px}.rm-glass .rm-steps button{width:100%;flex:1 1}.rm-glass .rm-steps button.on{width:100%}.rm-glass .rm-hint{margin:10px 0 0}.rm-label{font:700 14px var(--f-display);fill:rgba(255,255,255,.55);paint-order:stroke;stroke:rgba(0,0,0,.55);stroke-width:3px}.rm-camp.lit .rm-label{fill:#ffd37a}.rm-camp.now .rm-label{fill:#4dffa6}:root[data-theme=light] .rm-label{fill:rgba(13,26,43,.55);stroke:rgba(255,255,255,.8)}:root[data-theme=light] .rm-camp.lit .rm-label{fill:#9a4a00}:root[data-theme=light] .rm-camp.now .rm-label{fill:#0a6e3d}.rm-prop{font-size:20px;animation:bob 2.6s ease-in-out infinite}.rm-camp.now .rm-prop{font-size:26px}.rm-journey{position:absolute;right:24px;bottom:28px;z-index:3;display:flex;align-items:center;gap:10px;padding:8px 14px 8px 8px;border-radius:999px;background:rgba(8,13,28,.62);border:1px solid rgba(255,255,255,.12);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#fff;font:700 14px var(--f-tech)}:root[data-theme=light] .rm-journey{background:rgba(255,255,255,.8);color:var(--fg);border-color:rgba(13,26,43,.1)}.rm-journey small{display:block;font-size:11px;letter-spacing:.12em;text-transform:uppercase;opacity:.7}.rm-ring{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--accent) var(--pct),rgba(255,255,255,.15) 0);position:relative}.rm-ring:before{content:"";position:absolute;inset:5px;border-radius:50%;background:#0b1226}:root[data-theme=light] .rm-ring:before{background:#fff}.rm-ring b{position:relative;font-size:11px}@media (max-width:900px){.rmap-panel{justify-content:flex-start;padding-top:108px}.rmap-panel>.rm-glass{max-width:none;padding:14px 16px}.rm-glass .rm-card h2{font-size:21px}.rm-glass .rm-card p{font-size:14px;margin-bottom:10px}.rm-card li{font-size:12px;padding:2px 10px}.rm-journey{right:12px;bottom:14px}.rmap-scene svg{height:62%}.rmap-scene:after,:root[data-theme=light] .rmap-scene:after{background:linear-gradient(180deg,var(--bg) 0,var(--bg) 36%,transparent 46%,transparent 96%,var(--bg) 100%)}}.rm-prop{font-size:17px}.rm-camp.now .rm-prop{font-size:20px}.l-hero .l-wrap{max-width:1440px;padding:0 clamp(20px,4vw,64px)}.l-hero-grid{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:clamp(24px,6vw,110px)}.pglow{width:760px;height:760px;background:radial-gradient(circle,rgba(31,229,132,.34) 0,rgba(31,229,132,.14) 35%,transparent 65%);transition:left .12s ease-out,top .12s ease-out}:root[data-theme=light] .pglow{background:radial-gradient(circle,rgba(15,157,88,.22) 0,rgba(15,157,88,.08) 35%,transparent 65%)}.orbit{border-width:1.5px;border-color:rgba(31,229,132,.7)}.orbit.o2{border-color:rgba(255,59,92,.6)}.orbit:after{width:12px;height:12px;top:-6px}:root[data-theme=light] .orbit{border-color:rgba(15,157,88,.65)}:root[data-theme=light] .orbit.o2{border-color:rgba(229,32,63,.55)}.l-hero .l-wrap{max-width:1720px}.vp{border-radius:16px;overflow:hidden;background:#000;border:1px solid var(--line);box-shadow:var(--shadow);-webkit-user-select:none;-moz-user-select:none;user-select:none}.vp,.vp-stage{position:relative}.vp-stage{aspect-ratio:16/9}.vp-mount,.vp-mount iframe,.vp-mount>div{position:absolute;inset:0;width:100%;height:100%;border:0}.vp-shield{inset:0;background:transparent;border:0;z-index:2}.vp-big,.vp-shield{position:absolute;cursor:pointer}.vp-big{left:50%;top:50%;transform:translate(-50%,-50%);z-index:3;width:74px;height:74px;border-radius:50%;border:0;background:rgba(255,59,92,.92);color:#fff;font-size:28px;padding-left:6px;box-shadow:0 0 30px rgba(255,59,92,.55)}.vp-load{position:absolute;inset:0;display:grid;place-items:center;color:#9fb0c8;z-index:1}.vp-wm{position:absolute;z-index:4;pointer-events:none;color:rgba(255,255,255,.42);font:700 clamp(11px,1.4vw,15px) var(--f-tech);letter-spacing:.04em;text-shadow:0 1px 2px rgba(0,0,0,.6);transition:left 2.2s ease-in-out,top 2.2s ease-in-out;white-space:nowrap}.vp-warn{left:50%;bottom:14px;transform:translateX(-50%);background:rgba(8,13,28,.9);color:#ffd37a;border:1px solid rgba(255,201,60,.5);border-radius:10px;padding:7px 12px;font-size:13px;max-width:90%;text-align:center}.vp-reel,.vp-warn{position:absolute;z-index:5}.vp-reel{top:12px;left:12px;background:var(--amber);color:#2a1a00;font:700 12px var(--f-tech);border-radius:999px;padding:3px 10px}.vp-bar{display:flex;align-items:center;gap:4px;padding:6px 10px 8px;color:#e9eef7}.vp,.vp-bar{background:#0b1020}.vp>.vp-track{margin:10px 14px 2px}.vp-btn{background:none;border:0;color:inherit;font-size:15px;cursor:pointer;width:36px;height:36px;border-radius:10px;flex:none;display:grid;place-items:center;padding:0}.vp-btn.on{color:var(--accent);background:rgba(31,229,132,.12)}.vp-btn:hover{background:rgba(255,255,255,.1)}.vp-track{position:relative;height:6px;margin:0 14px;border-radius:99px;background:rgba(255,255,255,.15);cursor:pointer;transition:height .15s}.vp-track:hover{height:9px}.vp-track:before{content:"";position:absolute;left:0;right:0;top:-10px;bottom:-8px}.vp-watched{background:rgba(31,229,132,.35)}.vp-cur,.vp-watched{position:absolute;left:0;top:0;bottom:0;border-radius:99px}.vp-cur{background:var(--red)}.vp-track b{position:absolute;top:50%;width:14px;height:14px;margin:-7px 0 0 -7px;border-radius:50%;background:#fff;box-shadow:0 0 0 3px rgba(255,59,92,.5)}.vp-time{font:600 12px var(--f-tech);white-space:nowrap;color:#c6d1e3}.vp-vol{width:80px;accent-color:var(--red)}.vp-rate{background:rgba(255,255,255,.1);color:#fff;border:0;border-radius:6px;padding:3px 4px;width:auto;font-size:12px}.vp-rate option{color:#000}.vp-pct{font:600 12px var(--f-tech);color:#9fb0c8;white-space:nowrap}.vp-pct.ok{color:var(--accent)}.vp:-webkit-full-screen{border-radius:0;display:flex;flex-direction:column}.vp:fullscreen{border-radius:0;display:flex;flex-direction:column}.vp:-webkit-full-screen .vp-stage{flex:1 1;aspect-ratio:auto}.vp:fullscreen .vp-stage{flex:1 1;aspect-ratio:auto}.vmeta{display:flex;gap:14px;align-items:flex-start;justify-content:space-between;flex-wrap:wrap;margin-top:14px;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--bg-2)}.vmeta-t{flex:1 1;min-width:240px}.vmeta-t h3{margin:0 0 4px;font-size:18px;line-height:1.4}.vmeta-t p{margin:0}.vmeta-a{display:flex;gap:8px;flex-wrap:wrap}.fb-btn{background:linear-gradient(90deg,#ff7a6b,#ff4d4d);border-color:#c93a3a;color:#fff;font-weight:700;letter-spacing:.03em}.btn.icon{width:46px;justify-content:center;padding:8px 0;font-size:17px}.btn.icon.on{background:var(--fg);color:var(--bg);border-color:var(--fg)}.unlock{margin-top:10px;padding:10px 14px;border-radius:12px;border:1px dashed var(--line);font-size:14px;color:var(--muted)}.unlock .ok{color:var(--accent);font-weight:600}.toc-as{color:var(--amber);font-size:11px}.desc h4,.res h4{margin:0 0 10px;font-size:16px}.res-list{display:grid;grid-gap:8px;gap:8px}.res-item{display:flex;gap:12px;align-items:center;padding:10px 14px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--fg);background:var(--bg-2)}.res-item:hover{border-color:var(--accent)}.res-item span:nth-child(2){flex:1 1;display:flex;flex-direction:column}.res-ic{font-size:22px}.res-go{color:var(--muted)}.desc-text{font-size:16px;line-height:1.8}.desc-sum li{margin-bottom:4px}.ebook-card{display:flex;gap:18px;align-items:center;padding:16px;border-radius:16px;border:1px solid rgba(31,229,132,.4);background:linear-gradient(135deg,var(--accent-soft),transparent);margin:16px 0 20px;flex-wrap:wrap}.ebook-card h4{margin:0 0 4px}.ebook-cover{width:92px;height:124px;border-radius:6px 12px 12px 6px;background:linear-gradient(160deg,#0f9d58,#0a5e36);color:#fff;padding:10px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:6px 6px 0 rgba(0,0,0,.25),inset 6px 0 0 rgba(0,0,0,.2);flex:none}.ebook-cover span{font:700 10px var(--f-tech);letter-spacing:.14em;opacity:.8}.ebook-cover b{font-size:12px;line-height:1.3;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}.reel-box{display:flex;gap:14px;align-items:center;justify-content:space-between;padding:14px 16px;border-radius:14px;border:1px solid rgba(255,201,60,.45);background:var(--amber-soft);margin-bottom:10px;flex-wrap:wrap}.tx{max-height:420px;overflow:auto;border:1px solid var(--line);border-radius:12px}.tx-line{display:flex;gap:12px;width:100%;text-align:left;border:0;border-bottom:1px solid var(--line);background:none;padding:8px 12px;cursor:pointer;color:var(--fg)}.tx-line:hover:not(:disabled){background:var(--surface-2)}.tx-line:disabled{opacity:.45;cursor:default}.tx-t{font:600 12px var(--f-tech);color:var(--accent);min-width:44px;padding-top:3px}.qa-top{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}.qa-ask{margin-top:12px}.qa-item{margin-top:14px;border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:var(--bg-2)}.qa-q{margin:8px 0;font-weight:600}.qa-a{background:var(--accent-soft);border-radius:10px;padding:10px 12px}.qa-a p{margin:4px 0 0;white-space:pre-wrap}.subtabs{display:flex;gap:18px;border-bottom:1px solid var(--line);margin-bottom:14px}.subtabs button{border:0;background:none;padding:8px 2px;cursor:pointer;color:var(--muted);font-weight:600;border-bottom:2px solid transparent}.subtabs button.on{color:var(--fg);border-bottom-color:var(--fg)}.note-card{border:1px solid var(--line);border-radius:14px;overflow:hidden;padding-bottom:14px}.note-card>*{margin-left:16px;margin-right:16px}.note-h{margin:0 0 14px;padding:12px 16px;background:var(--surface-2);display:flex;flex-direction:column}.note-card textarea{width:calc(100% - 32px);border-color:var(--amber)}.note-f{display:flex;justify-content:space-between;margin-top:4px;margin-bottom:10px}.notes-list{display:grid;grid-gap:8px;gap:8px}.note-item{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:var(--bg-2)}.note-item p{flex:1 1;margin:4px 0 0;white-space:pre-wrap}.mcq-q{margin-bottom:18px}.modal-back{position:fixed;inset:0;z-index:60;background:rgba(4,8,16,.6);display:grid;place-items:center;padding:16px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal{position:relative;width:min(520px,100%);max-height:calc(100vh - 32px);overflow:auto;background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:26px 24px;box-shadow:var(--shadow);animation:pop .25s ease-out}.modal h2{margin:0 0 6px;text-align:center;font-size:24px}.modal h4{margin:18px 0 8px}.modal-x{position:absolute;top:12px;right:12px;width:34px;height:34px;border-radius:50%;border:0;background:var(--surface-2);color:var(--fg);cursor:pointer}.stars-row{display:flex;justify-content:center;gap:8px;margin:10px 0}.stars-row button{border:0;background:none;font-size:34px;color:var(--line);cursor:pointer;transition:transform .1s}.stars-row button.on{color:#ffc93c}.stars-row button:hover{transform:scale(1.15)}.fbchip{border-color:rgba(255,122,107,.5);color:var(--fg)}.fbchip.on{background:#ff7a6b;border-color:#ff7a6b;color:#fff}.fbchip.warn{border-style:dashed}.btn.wide{width:100%;justify-content:center;margin-top:16px}@media (max-width:640px){.vp-pct,.vp-vol{display:none}.vp-bar{gap:6px;padding:6px 8px}.vmeta-a{width:100%}.fb-btn{flex:1 1;justify-content:center}}.ebook-mode main{max-width:900px}.eb-bar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:6px}.eb-hint{color:var(--muted);font-size:13px;margin:0 0 14px}.eb-book{background:#e9eef3;border-radius:16px;padding:18px}.eb-ch,.eb-page{background:#fff;color:#17212b;max-width:794px;margin:0 auto 18px;padding:56px 60px;font-family:Hind Siliguri,Anek Bangla,sans-serif;font-size:15.5px;line-height:1.85;box-shadow:0 2px 14px rgba(0,0,0,.1)}.eb-cover{min-height:1000px;display:flex;flex-direction:column;justify-content:space-between;background:radial-gradient(600px 400px at 100% 0,rgba(15,157,88,.14),transparent 60%),radial-gradient(500px 360px at 0 100%,rgba(229,32,63,.1),transparent 60%),#fff;border-top:10px solid #0f9d58}.eb-logo{height:70px;width:auto;align-self:flex-start}.eb-kick{font:700 13px Anek Bangla,sans-serif;letter-spacing:.1em;color:#0f9d58;text-transform:uppercase}.eb-cover h1{font:800 44px/1.25 Anek Bangla,sans-serif;color:#0b2f1c;margin:10px 0 12px}.eb-sub{font-size:19px;color:#3c4b5a;margin:0}.eb-cover-foot{display:grid;grid-template-columns:1fr 1.6fr 1fr;grid-gap:16px;gap:16px;border-top:2px solid #e3e9ef;padding-top:18px}.eb-cover-foot small{display:block;color:#6b7a89;font-size:12px}.eb-cover-foot b{font-size:14px;line-height:1.5}.eb-h{font:700 26px/1.35 Anek Bangla,sans-serif;color:#0b2f1c;margin:6px 0 14px}.eb-toc{font-size:17px;padding-left:22px;border-left:3px solid #0f9d58}.eb-toc li{padding:4px 0;border-bottom:1px dotted #c9d4de}.eb-intro{margin-top:30px;background:#f1f8f4;border-left:5px solid #0f9d58;padding:16px 20px;border-radius:10px}.eb-intro h3{margin:0 0 6px;font-family:Anek Bangla,sans-serif}.eb-no{display:inline-block;font:700 12px Anek Bangla,sans-serif;color:#fff;background:#0f9d58;border-radius:6px;padding:2px 10px}.eb-steps{background:#f7f9fb;border:1px solid #dfe6ec;border-radius:12px}.eb-steps,.eb-tips{padding:12px 18px;margin:14px 0}.eb-tips{background:#fff8e1;border:1px solid #f3dc8f;border-radius:12px}.eb-sum{background:linear-gradient(135deg,#0f9d58,#0a6e3d);color:#fff;border-radius:16px;padding:18px 26px;margin-bottom:26px}.eb-sum h2{font-family:Anek Bangla,sans-serif;margin:0 0 8px}.eb-gl{display:grid;grid-template-columns:1fr 1fr;grid-gap:10px 22px;gap:10px 22px}.eb-gl dt{font-weight:700;color:#0b2f1c}.eb-gl dd{margin:0;color:#3c4b5a;font-size:14px}.eb-foot{margin-top:30px;padding-top:10px;border-top:1px solid #e3e9ef;font-size:11px;color:#6b7a89;overflow-wrap:anywhere}@media (max-width:700px){.eb-ch,.eb-page{padding:26px 20px;font-size:15px}.eb-cover{min-height:640px}.eb-cover h1{font-size:30px}.eb-cover-foot,.eb-gl{grid-template-columns:1fr}.eb-book{padding:6px}}@media print{@page{size:A4;margin:0}.ebook-mode .foot,.ebook-mode .top,.ebook-mode .walker{display:none!important}.ebook-mode main{padding:0;max-width:none}.eb-book{background:none;padding:0;border-radius:0}.eb-ch,.eb-page{box-shadow:none;margin:0;max-width:none;padding:18mm;page-break-after:always;break-after:page}.eb-cover{min-height:297mm}*{-webkit-print-color-adjust:exact;print-color-adjust:exact}}.bnav{display:none}@media (max-width:900px){.l-hero .l-wrap{padding:0 18px}.l-hero-grid{grid-template-columns:minmax(0,1fr);gap:4px}.l-hero h1{font-size:clamp(34px,9.5vw,52px)}.l-hero p{font-size:16.5px}}@media (max-width:640px){.top{flex-wrap:nowrap;gap:8px;padding:max(8px,env(safe-area-inset-top)) 12px 8px}.top nav{display:none}.brand{order:0;flex:none}.logo-img{height:30px}.hud{order:1;margin-left:auto;width:auto;gap:6px;font-size:12px;min-height:0}.hud-bar,.hud-rank{display:none}.hud-streak{padding:3px 8px}.toggles{order:2;margin-left:0;gap:6px}.seg button{padding:3px 8px;font-size:12px}.mode{width:32px;height:32px}.bnav{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:50;background:rgba(8,13,28,.94);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom))}:root[data-theme=light] .bnav{background:rgba(255,255,255,.95)}.bnav a{flex:1 1;display:flex;flex-direction:column;align-items:center;gap:1px;text-decoration:none;color:var(--muted);font-size:11px;font-weight:600;padding:4px 0;border-radius:12px}.bnav a span{font-size:19px;line-height:1.2}.bnav a.on{color:var(--accent);background:var(--accent-soft)}body{padding-bottom:calc(64px + env(safe-area-inset-bottom))}.foot{padding-bottom:12px}.l-hero{padding:6px 0 40px}.l-bot{height:300px}.tilt-robot{width:150px;height:220px}.orbit.o1{width:220px;height:220px}.orbit.o2{width:284px;height:284px}.hero-say{top:4px;right:50%;transform:translateX(50%);font-size:13px;white-space:nowrap;animation:none}.fchip{font-size:11px;padding:4px 10px}.fchip.f1{left:0;top:30%}.fchip.f2{right:0;top:62%}.fchip.f3{left:8%;bottom:4%}.eyebrow{font-size:10.5px;letter-spacing:.12em}.l-hero h1{margin:12px 0 10px}.l-cta{flex-direction:column;align-items:stretch;gap:12px}.l-cta .btn.lg{justify-content:center}.l-more{text-align:center}.scroll-cue{display:none}.l-sec{padding:36px 0}.l-wrap{padding:0 16px}.l-h2{font-size:27px;margin-bottom:20px}.stack-card{padding:20px;border-radius:20px;min-height:0;gap:16px}.stack-card h3{font-size:22px}.stack-card p{font-size:15px}.mock{transform:none;padding:14px}.track span{font-size:13px;padding:7px 14px}.tri-card,.vs-card{padding:20px}.faq summary{font-size:16px}.l-final{padding:20px 16px 40px}.l-final-in{padding:32px 16px 36px}.walker{display:none}.rmap-panel{padding-top:62px}.rm-journey{bottom:calc(76px + env(safe-area-inset-bottom))}.course{gap:12px}main,main.wide{padding-left:12px;padding-right:12px}.card.lesson{padding:14px}.tabs{margin:16px -14px 12px;padding:0 14px 6px;scroll-snap-type:x mandatory}.tabs button{scroll-snap-align:start;padding:6px 12px;font-size:13px}.vmeta{padding:12px}.vmeta-t h3{font-size:16px}.vmeta-a{display:grid;grid-template-columns:1fr repeat(4,44px);grid-gap:6px;gap:6px}.btn.icon{width:44px}.modal{padding:22px 16px;border-radius:18px}.stars-row button{font-size:30px}}@media (max-width:360px){.logo-img{height:26px}.hud-num{display:none}.l-hero h1{font-size:31px}}@media (max-width:640px){.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:5px;gap:5px;margin-bottom:12px}.steps span{min-width:0;font-size:10.5px;padding:6px 4px;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.guide .bubble{font-size:14px;padding:8px 12px}}.toc-toggle{display:none}@media (max-width:900px){.course{display:flex;flex-direction:column}.course>section{min-width:0}.toc{display:none;position:static!important;max-height:none}.toc.open{display:block}.toc-toggle{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;text-align:left;border:1px solid var(--line);background:var(--surface);color:var(--fg);border-radius:14px;padding:10px 14px;cursor:pointer}.toc-toggle span:first-child{display:flex;flex-direction:column;min-width:0}.toc-toggle b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:14px}.toc-toggle small{color:var(--muted);font-size:12px}.course>.toc,.course>.toc-toggle,.course>section{width:100%;max-width:100%;min-width:0}.card.lesson{min-width:0;max-width:100%}.vp-bar{min-width:0}.vp-time{font-size:11px}}.tilt-robot{touch-action:none;cursor:-webkit-grab;cursor:grab;perspective:900px;outline:none}.tilt-robot.grab{cursor:-webkit-grabbing;cursor:grabbing}.tr-body{transform-style:preserve-3d;will-change:transform}.tr-body,.tr-body img{position:absolute;inset:0}.tr-body img{width:100%;height:100%;object-fit:contain;transform:none;transition:none;animation:bob 3.2s ease-in-out infinite;filter:drop-shadow(0 18px 30px rgba(31,229,132,.3));pointer-events:none}.tilt-robot.grab .tr-body img{animation-play-state:paused;filter:drop-shadow(0 30px 40px rgba(31,229,132,.45))}.tilt-robot.hop .tr-body img{animation:hop .7s ease-in-out}.tr-shadow{transform:scale(calc(1 - var(--lift, 0) * .35));opacity:calc(1 - var(--lift, 0) * .5)}.tr-say{position:absolute;z-index:4;bottom:100%;left:50%;transform:translateX(-50%);margin-bottom:4px;white-space:nowrap;background:var(--fg);color:var(--bg);font-weight:700;font-size:14px;padding:7px 13px;border-radius:14px;box-shadow:var(--shadow);animation:pop .3s ease-out;pointer-events:none}.tr-say:after{content:"";margin-left:-6px;border:6px solid transparent;border-top:6px solid var(--fg)}.tr-hint,.tr-say:after{position:absolute;top:100%;left:50%}.tr-hint{z-index:4;transform:translateX(-50%);margin-top:14px;white-space:nowrap;font:600 12px var(--f-tech);color:var(--accent);background:var(--accent-soft);border:1px solid rgba(31,229,132,.4);border-radius:999px;padding:4px 12px;animation:pulse 1.8s infinite;pointer-events:none}.l-bot:has(.tr-say) .hero-say{opacity:0;transition:opacity .2s}@media (max-width:640px){.tr-say{font-size:12px}.tr-hint{margin-top:8px}}.l-bot .live-robot{max-width:520px;height:470px}.l-bot .live-robot iframe{pointer-events:auto}@media (max-width:900px){.l-bot .live-robot{height:330px}}@media (max-width:640px){.l-bot{height:330px}.l-bot .live-robot{height:320px;max-width:100%}.l-bot .lr-still{height:220px}}.mt-fab{position:fixed;right:20px;bottom:20px;z-index:55;display:flex;align-items:center;gap:8px;padding:6px 16px 6px 8px;border-radius:999px;border:1px solid rgba(31,229,132,.5);background:linear-gradient(135deg,#0e1f17,#0b1626);color:#eaf2ff;font-weight:700;cursor:pointer;box-shadow:0 10px 30px rgba(0,0,0,.4),0 0 24px rgba(31,229,132,.3);animation:pop .4s ease-out}.mt-fab img{height:40px;width:auto;animation:bob 3s ease-in-out infinite}.mt-fab:hover{transform:translateY(-2px)}:root[data-theme=light] .mt-fab{background:#fff;color:var(--fg)}.rm-journey{bottom:92px}.mentor{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);color:var(--fg)}.mentor-panel{position:fixed;z-index:70;right:20px;bottom:20px;width:min(420px,calc(100vw - 40px));height:min(640px,calc(100vh - 100px));border-radius:20px;box-shadow:0 24px 60px rgba(0,0,0,.5);animation:pop .25s ease-out;overflow:hidden}.mentor-inline{height:560px;border-radius:16px;overflow:hidden}.mt-head{display:flex;align-items:center;gap:10px;padding:10px 12px;border-bottom:1px solid var(--line);background:linear-gradient(135deg,rgba(31,229,132,.14),transparent)}.mt-head img{height:40px;width:auto;flex:none}.mt-title{flex:1 1;min-width:0;display:flex;flex-direction:column}.mt-title b{font-size:15px}.mt-title small{color:var(--muted);font-size:11.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mt-ic{width:32px;height:32px;border-radius:9px;border:0;background:var(--surface-2);color:var(--fg);cursor:pointer;flex:none}.mt-ic[aria-pressed=true]{background:var(--accent-soft);color:var(--accent)}.mt-ic:disabled{opacity:.4;cursor:default}.mt-list{flex:1 1;overflow-y:auto;padding:14px 12px;display:flex;flex-direction:column;gap:12px;overscroll-behavior:contain}.mt-empty{text-align:center;color:var(--muted);padding:18px 10px}.mt-empty b{color:var(--fg);font-size:17px}.mt-msg{display:flex;flex-direction:column;max-width:92%}.mt-msg.user{align-self:flex-end}.mt-msg.assistant{align-self:flex-start}.mt-bub{padding:9px 13px;border-radius:16px;font-size:14.5px;line-height:1.7;overflow-wrap:anywhere}.mt-msg.user .mt-bub{background:var(--accent);color:var(--accent-ink);border-bottom-right-radius:4px;white-space:pre-wrap}.mt-msg.assistant .mt-bub{background:var(--surface-2);border:1px solid var(--line);border-bottom-left-radius:4px}.mt-bub p{margin:0 0 8px}.mt-bub p:last-child{margin-bottom:0}.mt-bub ol,.mt-bub ul{margin:0 0 8px;padding-left:20px}.mt-chip{display:inline-flex;align-items:center;gap:3px;margin:0 2px;padding:0 8px;border-radius:999px;border:1px solid rgba(255,59,92,.5);background:var(--red-soft);color:var(--red);font:700 12px var(--f-tech);cursor:pointer;vertical-align:1px}:root:not([data-theme=light]) .mt-chip{color:#ff8fa3}.mt-chip:hover{background:var(--red);color:#fff}.mt-course{margin-top:6px}.mt-acts{display:flex;gap:4px;margin-top:4px}.mt-acts button{border:0;background:none;cursor:pointer;font-size:13px;opacity:.55;padding:2px 5px;border-radius:6px;color:var(--fg)}.mt-acts button.on,.mt-acts button:hover{opacity:1;background:var(--surface-2)}.mt-typing{display:inline-flex;gap:4px;padding:4px 0}.mt-typing i{width:7px;height:7px;border-radius:50%;background:var(--accent);animation:pulse 1s infinite}.mt-typing i:nth-child(2){animation-delay:.2s}.mt-typing i:nth-child(3){animation-delay:.4s}.mt-sugs{display:flex;gap:6px;padding:0 12px 8px;overflow-x:auto}.mt-sugs button{flex:none;max-width:260px;text-align:left;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;border:1px solid rgba(31,229,132,.45);background:var(--accent-soft);color:var(--accent);border-radius:999px;padding:5px 12px;font-size:12.5px;cursor:pointer}.mt-note{margin:0 12px 6px;font-size:12px;color:var(--amber)}.mt-form{display:flex;align-items:flex-end;gap:6px;padding:8px 10px;border-top:1px solid var(--line);background:var(--bg-2)}.mt-form textarea{flex:1 1;min-height:40px;max-height:120px;resize:none;padding:9px 12px;border-radius:12px;font-size:14.5px}.mt-mic,.mt-send{width:40px;height:40px;flex:none;border-radius:12px;border:1px solid var(--line);background:var(--surface-2);color:var(--fg);cursor:pointer;font-size:16px}.mt-send{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.mt-send:disabled{opacity:.45;cursor:default}.mt-mic.on{background:var(--red);border-color:var(--red);color:#fff;animation:pulse 1s infinite}.mt-foot{margin:0;padding:4px 12px 8px;font-size:10.5px;color:var(--muted);text-align:center;background:var(--bg-2)}@media (max-width:640px){.mt-fab{right:12px;bottom:calc(76px + env(safe-area-inset-bottom));padding:4px 12px 4px 6px;font-size:13px}.mt-fab img{height:32px}.mentor-panel{left:0;right:0;bottom:0;top:0;width:100%;height:100dvh;border-radius:0;border:0;padding-bottom:env(safe-area-inset-bottom)}.mentor-inline{height:480px}.rm-journey{bottom:calc(130px + env(safe-area-inset-bottom))}}@media print{.mentor-panel,.mt-fab{display:none!important}}.mt-chip.locked{opacity:.65;border-style:dashed}.link-code{display:flex;flex-direction:column;margin:10px 0 0}.link-code b{font:700 30px/1.2 var(--f-tech);letter-spacing:.18em;color:var(--accent)}.vp-big svg{width:32px;height:32px;margin-left:-4px}.vp-gap{flex:1 1}.vp-volbox{display:flex;align-items:center}.vp-volbox .vp-vol{width:0;opacity:0;transition:width .2s,opacity .2s}.vp-volbox:focus-within .vp-vol,.vp-volbox:hover .vp-vol{width:80px;opacity:1;margin-right:6px}.vp-tag{font:700 11px var(--f-tech);background:rgba(255,255,255,.12);border-radius:6px;padding:2px 6px}.vp-hint{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:5;background:rgba(0,0,0,.6);color:#fff;font:700 18px var(--f-tech);border-radius:999px;padding:10px 18px;pointer-events:none;animation:pop .2s ease-out}.vp-menu-wrap{position:relative}.vp-menu{position:absolute;right:0;bottom:44px;z-index:20;width:270px;background:rgba(10,14,28,.97);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:12px;box-shadow:0 16px 40px rgba(0,0,0,.5);font-size:13px;animation:pop .15s ease-out}.vp-menu b{display:block;font-size:12px;color:#9fb0c8;margin:4px 0 6px;text-transform:uppercase;letter-spacing:.04em}.vp-menu p{margin:0 0 8px;color:#dbe4f3;line-height:1.5}.vp-speeds{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}.vp-speeds button{background:rgba(255,255,255,.08);color:#e9eef7;border:1px solid transparent;border-radius:8px;padding:4px 9px;font:600 12px var(--f-tech);cursor:pointer}.vp-speeds button.on{border-color:var(--accent);color:var(--accent)}.vp-keys kbd{background:rgba(255,255,255,.12);border-radius:4px;padding:0 5px;font:600 11px var(--f-tech)}.vp:-webkit-full-screen .vp-menu{bottom:52px}.vp:fullscreen .vp-menu{bottom:52px}.course.theater{grid-template-columns:minmax(0,1fr)}.course.theater>.toc{display:none}.vp-mini{position:fixed;right:20px;bottom:90px;width:min(380px,calc(100vw - 24px));z-index:60;border-radius:14px;box-shadow:0 20px 50px rgba(0,0,0,.6);animation:pop .25s ease-out}.vp-mini .vp-bar .vp-menu-wrap,.vp-mini .vp-bar .vp-pct,.vp-mini .vp-bar .vp-theater,.vp-mini .vp-bar .vp-volbox,.vp-mini .vp-time{display:none}.vp-mini-bar{position:absolute;top:6px;right:6px;z-index:6;display:flex;gap:4px}.vp-mini-bar button{width:30px;height:30px;border-radius:8px;border:0;background:rgba(0,0,0,.6);color:#fff;cursor:pointer;display:grid;place-items:center}.vp-wrap{min-height:1px}.vp-wrap.holding{border-radius:16px;background:rgba(255,255,255,.03);border:1px dashed var(--line)}@media (max-width:720px){.vp-btn{width:32px;height:32px}.vp-theater{display:none}.vp-menu{right:-40px;width:min(270px,86vw)}.vp-mini{left:12px;right:auto;bottom:calc(80px + env(safe-area-inset-bottom));width:62vw}}.vp-menu{max-height:min(70vh,460px);overflow-y:auto}.vp-menu b small{text-transform:none;color:var(--accent)}.vp-row{display:flex;align-items:center;justify-content:space-between;margin:2px 0 8px;color:#dbe4f3}.vp-sw{width:38px;height:22px;border-radius:99px;border:0;background:rgba(255,255,255,.2);position:relative;cursor:pointer;padding:0}.vp-sw i{position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;background:#fff;transition:left .15s}.vp-sw.on{background:var(--accent)}.vp-sw.on i{left:19px}.vp-sw:disabled{opacity:.4;cursor:not-allowed}.vp-range{display:grid;grid-template-columns:80px 1fr 40px;align-items:center;grid-gap:6px;gap:6px;margin-bottom:6px;color:#dbe4f3}.vp-range input{accent-color:var(--accent);width:100%}.vp-range em{font:600 11px var(--f-tech);font-style:normal;text-align:right;color:#9fb0c8}.vp-mount{transition:filter .2s}.vp-shield{-webkit-touch-callout:none;touch-action:manipulation}.toc-offline{width:100%;margin:0 0 6px;justify-content:center}.notice-bar{background:linear-gradient(90deg,rgba(31,229,132,.16),rgba(255,201,60,.14));border-bottom:1px solid var(--line);text-align:center;padding:8px 14px;font-size:14px;font-weight:600}.notice-bar a{color:inherit;text-decoration:none}.notice-bar a:hover{text-decoration:underline}.maint{max-width:520px;margin:8vh auto;text-align:center;padding:32px 24px}.maint img{height:110px;width:auto}.acct-link{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;border:1px solid var(--line);color:var(--fg);text-decoration:none;font-weight:700;font-size:14px;white-space:nowrap;min-width:0}.acct-link.in{border-color:rgba(31,229,132,.5)}.acct-link:empty{display:none}.note.err{border-color:rgba(255,59,92,.5);color:#ff8fa3}:root[data-theme=light] .note.err{color:#b3123a}.auth-card{max-width:460px;margin:4vh auto;display:flex;flex-direction:column;gap:10px;padding:28px 24px}.auth-card h1{margin:0}.auth-card label{font-weight:600;font-size:14px;margin-top:4px}.auth-card ol{padding-left:20px;margin:6px 0}.auth-bot{height:72px;width:auto;align-self:flex-start}.pw-row{display:flex;gap:8px}.pw-row input{flex:1 1;min-width:0}.portal-head{justify-content:space-between;gap:16px;flex-wrap:wrap}.portal-head,.portal-id{display:flex;align-items:center}.portal-id{gap:14px;min-width:0}.portal-id h1{margin:0 0 2px;font-size:24px}.portal-id p{margin:2px 0;overflow-wrap:anywhere}.portal-av{width:60px;height:60px;border-radius:50%;display:grid;place-items:center;font:800 26px var(--f-tech);background:linear-gradient(135deg,var(--accent),#0bb3ff);color:#04210f;flex:none}.portal-bar{display:flex;justify-content:space-between;align-items:center;margin:22px 0 12px}.portal-bar h2{margin:0}.adm{display:grid;grid-template-columns:220px minmax(0,1fr);grid-gap:20px;gap:20px;align-items:start}.adm-nav{position:-webkit-sticky;position:sticky;top:76px;display:flex;flex-direction:column;gap:4px;padding:12px;margin:0}.adm-brand{font:700 13px var(--f-tech);letter-spacing:.1em;text-transform:uppercase;color:var(--amber);padding:6px 10px 10px}.adm-nav button{display:flex;gap:10px;align-items:center;text-align:left;border:0;background:none;color:var(--fg);padding:9px 10px;border-radius:10px;cursor:pointer;font-size:14px;font-weight:600}.adm-nav button:hover{background:rgba(255,255,255,.06)}.adm-nav button.on{background:rgba(31,229,132,.14);color:var(--accent)}.adm-nav .adm-out{margin-top:8px;border-top:1px solid var(--line);border-radius:0 0 10px 10px;color:var(--muted,#9fb0c8)}.adm-main h1{margin:0 0 14px}.adm-main .card{margin:0 0 16px}.adm-main .card h2{margin:0 0 10px;font-size:18px}.adm-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));grid-gap:12px 16px;gap:12px 16px;margin:10px 0}.adm-f{display:flex;flex-direction:column;gap:5px;font-size:14px;margin:8px 0;min-width:0}.adm-f>span{font-weight:600}.adm-f small,.adm-key small,.adm-t small{color:var(--muted,#9fb0c8);font-size:12.5px;line-height:1.5;display:block;font-weight:400}.adm-f input,.adm-f select,.adm-f textarea,.adm-key input,.adm-search{width:100%}.adm-t{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:10px 0;border-bottom:1px solid var(--line)}.adm-t:last-of-type{border-bottom:0}.adm-sw{width:46px;height:26px;border-radius:99px;border:0;background:rgba(128,140,160,.45);position:relative;cursor:pointer;flex:none;padding:0}.adm-sw i{position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:left .15s}.adm-sw.on{background:var(--accent)}.adm-sw.on i{left:23px}.adm-save{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:14px;padding-top:12px;border-top:1px solid var(--line)}.adm-ok{color:var(--accent)}.adm-bad{color:#ff8fa3}:root[data-theme=light] .adm-bad{color:#b3123a}:root[data-theme=light] .adm-ok{color:#0a8a4c}.adm-pick{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));grid-gap:10px;gap:10px;margin:10px 0}.adm-pick button{text-align:left;border:1px solid var(--line);background:none;color:var(--fg);border-radius:12px;padding:10px 12px;cursor:pointer}.adm-pick button small{display:block;color:var(--muted,#9fb0c8);font-size:12px;margin-top:2px}.adm-pick button.on{border-color:var(--accent);background:rgba(31,229,132,.1)}.adm-key{border:1px solid var(--line);border-radius:12px;padding:12px;margin:12px 0 8px}.adm-key-h{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}.adm-key-r{display:flex;gap:8px}.adm-key-r input{flex:1 1;min-width:0}.adm-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));grid-gap:12px;gap:12px;margin-bottom:16px}.adm-stat{margin:0!important;display:flex;flex-direction:column;gap:2px}.adm-stat small{color:var(--muted,#9fb0c8)}.adm-stat b{font:800 30px var(--f-tech)}.adm-stat span{font-size:12.5px;color:var(--muted,#9fb0c8)}.adm-two{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));grid-gap:16px;gap:16px}.adm-check{display:flex;justify-content:space-between;align-items:center;gap:10px;width:100%;border:0;border-bottom:1px solid var(--line);background:none;color:var(--fg);padding:9px 0;cursor:pointer;text-align:left;font-size:14px}.adm-check:last-child{border-bottom:0}.adm-bars{display:flex;align-items:flex-end;gap:8px;height:150px}.adm-bars>div{flex:1 1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%;gap:4px;min-width:0}.adm-bars i{width:100%;max-width:34px;min-height:2px;border-radius:6px 6px 2px 2px;background:var(--accent)}.adm-bars em{font:600 11px var(--f-tech);font-style:normal;color:var(--muted,#9fb0c8)}.adm-bars small{font-size:10.5px;color:var(--muted,#9fb0c8);white-space:nowrap}.adm-list{margin:6px 0;padding-left:20px;line-height:1.8;font-size:14px}.adm-partner{border:1px solid var(--line);border-radius:12px;padding:12px;margin:12px 0;display:flex;flex-direction:column;gap:6px;align-items:flex-start}.adm-partner>*{width:100%}.adm-partner>.btn{width:auto}.adm-pre{background:rgba(0,0,0,.3);border:1px solid var(--line);border-radius:10px;padding:12px;overflow-x:auto;font:12.5px/1.6 ui-monospace,monospace;white-space:pre}:root[data-theme=light] .adm-pre{background:#f1f4f9}.adm-search{margin-bottom:12px}.adm-table-wrap{overflow-x:auto;padding:0!important}.adm-table{width:100%;border-collapse:collapse;font-size:14px}.adm-table td,.adm-table th{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap}.adm-table th{font:600 12px var(--f-tech);text-transform:uppercase;letter-spacing:.05em;color:var(--muted,#9fb0c8)}.adm-table td small{display:block;color:var(--muted,#9fb0c8);font-size:12px}.adm-table tr.blocked td{opacity:.5}.adm-table tr:last-child td{border-bottom:0}@media (max-width:860px){.adm{grid-template-columns:minmax(0,1fr)}.adm-nav{position:static;flex-direction:row;overflow-x:auto;padding:8px}.adm-nav button{white-space:nowrap}.adm-brand,.adm-nav .adm-out{border:0;margin:0}.adm-brand{display:none}.adm-key-r{flex-wrap:wrap}.acct-link{padding:5px 10px;font-size:13px}}