.ie{--ie-paper:#f8f2e6;--ie-ink:#1b2559;--ie-ink-soft:rgba(27,37,89,.72);--ie-ink-faint:rgba(27,37,89,.13);--ie-night:#14183c;--ie-on-night:#f6f1e6;--ie-on-night-soft:hsla(41,47%,93%,.74);--ie-blue:#2d6ae0;--ie-leaf:#3e7a4a;--ie-leaf-soft:rgba(62,122,74,.12);--ie-laterite:#b8643e;--ie-laterite-deep:#94472a;--ie-gold:#f5c46a;--ie-card:rgba(255,252,245,.82);--ie-display:var(--font-geist),"Geist",ui-sans-serif,system-ui,sans-serif;--ie-body:var(--font-inter),"Inter",ui-sans-serif,system-ui,sans-serif;--ie-mono:var(--font-jetbrains),"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;--ie-top:var(--nav-h,0px);--ie-scale-h:46px;position:relative;color:var(--ie-ink);background-color:var(--ie-paper);font-family:var(--ie-body);font-size:17px;line-height:1.6;overflow-x:clip}.ie *,.ie :after,.ie :before{box-sizing:border-box}.ie [hidden]{display:none!important}.ie h1,.ie h2{font-family:var(--ie-display);font-weight:400;letter-spacing:-.025em;text-wrap:balance;margin:0}.ie p{margin:0}.ie a{color:inherit}.ie :focus-visible{outline:2px solid var(--ie-blue);outline-offset:3px;border-radius:4px}.ie img{max-width:100%}.ie button{font-family:inherit}.ie-wrap{max-width:1440px;margin-inline:auto;padding-inline:16px;width:100%}@media (min-width:640px){.ie-wrap{padding-inline:24px}}@media (min-width:1024px){.ie-wrap{padding-inline:48px}}.ie-scale{position:fixed;z-index:44;left:0;right:0;top:var(--ie-top);height:var(--ie-scale-h);pointer-events:none;background:linear-gradient(180deg,hsla(40,56%,94%,.95),hsla(40,56%,94%,.8));backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border-bottom:1px solid var(--ie-ink-faint);transition:background-color .4s,border-color .4s}.ie[data-on-night=true] .ie-scale{background:linear-gradient(180deg,rgba(20,24,60,.92),rgba(20,24,60,.78));border-color:hsla(41,47%,93%,.12)}.ie-scale-track{position:absolute;left:28px;right:28px;bottom:9px;height:1px;background-color:var(--ie-ink-soft);pointer-events:auto;cursor:pointer}@media (min-width:1024px){.ie-scale-track{left:56px;right:56px}}.ie[data-on-night=true] .ie-scale-track{background-color:var(--ie-on-night-soft)}.ie-scale-done{position:absolute;left:0;top:-2px;height:4px;width:calc(var(--ie-p, 0) * 100%);border-radius:2px;background:linear-gradient(90deg,var(--ie-leaf),#8dba55)}.ie-scale-stop{position:absolute;bottom:0;width:1px;height:11px;background:var(--ie-ink)}.ie[data-on-night=true] .ie-scale-stop{background:var(--ie-on-night)}.ie-scale-label{position:absolute;bottom:14px;left:50%;translate:-50% 0;white-space:nowrap;font:500 10.5px/1 var(--ie-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--ie-ink-soft);transition:color .3s}.ie[data-on-night=true] .ie-scale-label{color:var(--ie-on-night-soft)}.ie-scale-stop[data-current=true] .ie-scale-label{color:var(--ie-leaf);font-weight:600}.ie[data-on-night=true] .ie-scale-stop[data-current=true] .ie-scale-label{color:#a9d77a}.ie-scale-stop:first-of-type .ie-scale-label{translate:0 0;left:0}.ie-scale-stop:last-of-type .ie-scale-label{translate:-100% 0;left:0}.ie-scale-lamp{position:absolute;bottom:-1px;left:calc(var(--ie-p, 0) * 100%);width:36px;translate:-50% 0;transition:left .15s linear}.ie-scale-lamp img{display:block;width:100%;filter:drop-shadow(0 2px 2px rgba(27,37,89,.3))}.ie-scale-lamp.is-hop img{animation:ie-hop .55s cubic-bezier(.3,.6,.4,1)}@keyframes ie-hop{0%{translate:0 0;scale:1 1}25%{translate:0 -9px;scale:.95 1.08}60%{translate:0 -4px}to{translate:0 0;scale:1 1}}@media (max-width:1023px){.ie{--ie-scale-h:40px}.ie-scale-label{display:none}.ie-scale-track{bottom:8px;left:16px;right:16px}.ie-scale-now{display:block;position:absolute;left:16px;top:6px;font:500 10.5px/1 var(--ie-mono);text-transform:uppercase;letter-spacing:.12em;color:var(--ie-leaf)}.ie[data-on-night=true] .ie-scale-now{color:#a9d77a}.ie-scale-lamp{width:28px}}.ie-hero{position:relative;height:calc(185svh - var(--ie-top));background:#15172c}.ie-hero-stick{position:sticky;top:var(--ie-top);height:calc(100svh - var(--ie-top));overflow:hidden;isolation:isolate;color:var(--ie-on-night)}.ie-birds{position:absolute;inset:0;pointer-events:none;overflow:hidden}.ie-bird{position:absolute;left:-6%;width:2%;min-width:16px;animation:ie-fly 30s linear infinite;animation-delay:calc(var(--i) * -9s)}.ie-bird path{fill:none;stroke:#121a40;stroke-width:2.2;stroke-linecap:round;transform-origin:50% 60%;animation:ie-flap .6s ease-in-out infinite alternate}@keyframes ie-fly{0%{transform:translate(0)}50%{transform:translate(55vw,-2vh)}to{transform:translate(115vw,1vh)}}@keyframes ie-flap{0%{transform:scaleY(1)}to{transform:scaleY(-.35)}}.ie-hero-copy{width:100%;max-width:1440px;margin-inline:auto;padding:calc(var(--ie-scale-h) + 70px) 16px 40px;display:grid;gap:20px;opacity:calc(1 - var(--t, 0) * 1.9);translate:0 calc(var(--t, 0) * -60px)}@media (min-width:640px){.ie-hero-copy{padding-inline:24px}}@media (min-width:1024px){.ie-hero-copy{padding:calc(var(--ie-scale-h) + clamp(90px, 15vh, 170px)) 48px 48px;grid-template-columns:minmax(0,600px)}}@media (max-aspect-ratio:4/5){.ie-hero-copy{position:absolute;bottom:0;padding-bottom:32px;background:linear-gradient(0deg,rgba(14,15,32,.92) 40%,rgba(14,15,32,0));padding-top:48px;gap:14px}.ie-hero h1{font-size:clamp(30px,8.4vw,40px)}}.ie-eyebrow{font:500 12px/1.4 var(--ie-mono);text-transform:uppercase;letter-spacing:.16em;color:#a9d77a}.ie-hero h1{font-size:clamp(36px,4.7vw,66px);line-height:1.04;text-shadow:0 2px 30px rgba(8,9,24,.45)}.ie-hero-lead{font-size:clamp(16.5px,1.4vw,20px);color:var(--ie-on-night-soft);max-width:31em}.ie-begin{justify-self:start;display:inline-flex;align-items:center;gap:12px;color:var(--ie-on-night);text-decoration:none;font:500 13px/1 var(--ie-mono);letter-spacing:.12em;text-transform:uppercase;padding:12px 18px;border-radius:999px;border:1px solid hsla(41,47%,93%,.45);transition:background-color .2s,color .2s}.ie-begin:after{content:"";width:7px;height:7px;border-right:1.5px solid;border-bottom:1.5px solid;rotate:45deg;animation:ie-nudge 1.8s ease-in-out infinite}@keyframes ie-nudge{0%,to{translate:0 -3px}50%{translate:0 2px}}.ie-begin:hover{background:#a9d77a;color:#14183c;border-color:#a9d77a}.ie-ch{position:relative;padding-block:88px 72px;display:flex;flex-direction:column;justify-content:center;scroll-margin-top:calc(var(--ie-top) + var(--ie-scale-h))}@media (min-width:1024px){.ie-ch{min-height:calc(100vh - var(--ie-top));padding-block:calc(var(--ie-scale-h) + 36px) 44px}}.ie-grid{display:grid;gap:40px;align-items:center}@media (min-width:1024px){.ie-grid{grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:64px}.ie-flip>.ie-text{order:2}}.ie-text{display:grid;gap:18px;min-width:0;align-content:center;max-width:580px}.ie-head{display:grid;gap:14px;max-width:860px;margin-bottom:28px}.ie-ch h2{font-size:clamp(31px,3.5vw,52px);line-height:1.06}.ie-line{font-size:clamp(16.5px,1.25vw,18.5px);line-height:1.6;max-width:36em}.ie-line,.ie-who{color:var(--ie-ink-soft)}.ie-who{display:flex;flex-wrap:wrap;align-items:center;gap:4px 12px;font:500 12px/1.4 var(--ie-mono);text-transform:uppercase;letter-spacing:.12em}.ie-who-n{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--ie-leaf);color:#fff;letter-spacing:0}.ie-fine{font-size:13px}.ie-fine,.ie-note{color:var(--ie-ink-soft)}.ie-note{font-size:15px}.ie-fine a,.ie-note a{text-underline-offset:2px}.ie-cite{display:inline-grid;place-items:center;min-width:19px;height:19px;padding:0 5px;border-radius:999px;font:600 10.5px/1 var(--ie-mono);text-decoration:none;color:var(--ie-blue);background:rgba(45,106,224,.1);vertical-align:2px;transition:background-color .2s,color .2s}.ie-cite:hover{background:var(--ie-blue);color:#fff}.ie-more{border-top:1px solid var(--ie-ink-faint);padding-top:10px;max-width:36em}.ie-more summary{cursor:pointer;list-style:none;font:500 12px/1.4 var(--ie-mono);text-transform:uppercase;letter-spacing:.12em;color:var(--ie-ink-soft);display:inline-flex;align-items:center;gap:8px}.ie-more summary::-webkit-details-marker{display:none}.ie-more summary:before{content:"+";font-size:16px;line-height:1;color:var(--ie-laterite);transition:rotate .25s}.ie-more[open] summary:before{rotate:45deg}.ie-more-body{display:grid;gap:12px;padding-top:12px}.ie-list{margin:0;padding-left:18px;display:grid;gap:8px;font-size:15px;color:var(--ie-ink-soft)}.ie-btn{font:500 14.5px/1 var(--ie-body);border-radius:999px;padding:13px 20px;border:1.5px solid var(--ie-ink);background:var(--ie-ink);color:var(--ie-paper);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;transition:background-color .2s,color .2s}.ie-btn-ghost{background:transparent;color:var(--ie-ink)}.ie-btn-ghost:hover{background:var(--ie-ink);color:var(--ie-paper)}.ie-night{color:var(--ie-on-night);background-color:var(--ie-night)}.ie-night .ie-fine,.ie-night .ie-line,.ie-night .ie-list,.ie-night .ie-more summary,.ie-night .ie-note,.ie-night .ie-who{color:var(--ie-on-night-soft)}.ie-night .ie-label{color:var(--ie-gold)}.ie-night .ie-cite{color:#a9c4ff;background:rgba(143,180,255,.14)}.ie-night .ie-cite:hover{background:#a9c4ff;color:var(--ie-night)}.ie-night .ie-more{border-color:hsla(41,47%,93%,.14)}.ie-scene{position:relative;width:100%;max-width:760px;justify-self:center;isolation:isolate}.ie-l{position:absolute;inset:0;width:100%;height:100%;display:block}.ie.ie-js .ie-scene{-webkit-mask-image:url(/interactive/bnef-2026/bleed.png);mask-image:url(/interactive/bnef-2026/bleed.png);-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-position:center;mask-position:center;-webkit-mask-size:0 0;mask-size:0 0;transition:-webkit-mask-size 1.8s cubic-bezier(.2,.7,.2,1),mask-size 1.8s cubic-bezier(.2,.7,.2,1)}.ie.ie-js .ie-scene.is-in{-webkit-mask-size:320% 320%;mask-size:320% 320%}.ie.ie-js .ie-scene.is-done{-webkit-mask-image:none;mask-image:none}.ie-figs{margin:0;display:grid;gap:14px;width:100%;max-width:620px;justify-self:center}.ie-fig{position:relative;padding:20px 22px;border-radius:18px;background:var(--ie-card);border:1px solid var(--ie-ink-faint);display:grid;grid-template-columns:auto 1fr;column-gap:20px;align-items:center}.ie-fig-tag{position:absolute;top:12px;right:14px;font:500 10.5px/1 var(--ie-mono);letter-spacing:.12em;text-transform:uppercase;padding:5px 8px;border-radius:999px;background:var(--ie-ink-faint);color:var(--ie-ink-soft)}.ie-fig-in .ie-fig-tag{background:rgba(243,154,30,.2);color:var(--ie-laterite-deep)}.ie-fig-n{font:400 clamp(44px,4.6vw,68px)/1 var(--ie-display);letter-spacing:-.03em;color:var(--ie-leaf);font-variant-numeric:tabular-nums;min-width:3ch}.ie-fig-in .ie-fig-n{color:var(--ie-laterite)}.ie-fig-n small{font-size:.4em;letter-spacing:0;color:var(--ie-ink-soft)}.ie-fig-l{font-size:15.5px;line-height:1.45;padding-right:54px}.ie-figs .ie-fine{padding-inline:6px}.ie-rungs{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}.ie-rungs button{font:500 13.5px/1.2 var(--ie-body);display:inline-flex;align-items:center;gap:8px;padding:8px 13px 8px 8px;border-radius:999px;border:1px solid var(--ie-ink-faint);background:var(--ie-card);color:var(--ie-ink);cursor:pointer;transition:background-color .2s,color .2s,border-color .2s}.ie-rungs button:hover{border-color:var(--ie-leaf)}.ie-rungs button[aria-pressed=true]{background:var(--ie-leaf);border-color:var(--ie-leaf);color:#fff}.ie-rung-n{width:20px;height:20px;border-radius:50%;display:grid;place-items:center;font:600 11px var(--ie-mono);background:rgba(62,122,74,.15);color:var(--ie-leaf)}.ie-rungs button[aria-pressed=true] .ie-rung-n{background:#fff}.ie-rung-card{min-height:128px;padding:14px 18px;border-radius:14px;background:var(--ie-card);border:1px solid var(--ie-ink-faint)}.ie-rung-card>div{display:grid;gap:6px;font-size:15.5px;line-height:1.5}.ie-rung-card{display:grid}.ie-rung-card>div{grid-area:1/1;align-content:start}.ie-rung-card>div[hidden]{display:grid!important;visibility:hidden}.ie-fails{list-style:none;margin:0;padding:0;display:grid;gap:6px 18px;font-size:14.5px;color:var(--ie-on-night-soft)}.ie-fails strong{color:var(--ie-gold);font-weight:600}@media (max-width:520px){.ie-fails{grid-template-columns:1fr}}.ie-puzzle{width:100%;max-width:560px;justify-self:center;display:grid;gap:14px;padding:24px;border-radius:20px;background:hsla(0,0%,100%,.05);border:1px solid hsla(41,47%,93%,.16)}.ie-puzzle-q{font-family:var(--ie-display);font-size:clamp(17px,1.4vw,20px);line-height:1.4}.ie-options{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}@media (max-width:520px){.ie-options{grid-template-columns:repeat(2,minmax(0,1fr))}}.ie-options button{font:500 14px/1.2 var(--ie-body);padding:11px 8px;border-radius:12px;border:1px solid hsla(41,47%,93%,.3);background:transparent;color:var(--ie-on-night);cursor:pointer;transition:background-color .2s,border-color .2s}.ie-options button:hover{border-color:var(--ie-gold)}.ie-options button[data-mark=right]{background:#3e7a4a;border-color:#8dba55}.ie-options button[data-mark=wrong]{background:rgba(201,64,110,.35);border-color:#c9406e}.ie-puzzle-a{display:grid;gap:8px;font-size:15px;color:var(--ie-on-night-soft)}.ie-puzzle-v{font-family:var(--ie-display);font-size:20px;color:var(--ie-on-night)}.ie-check{border-top:1px solid hsla(41,47%,93%,.14);padding-top:12px;display:grid;gap:8px}.ie-check ol{margin:0;padding-left:20px;display:grid;gap:5px;font-size:14.5px;color:var(--ie-on-night-soft)}.ie-check strong{color:var(--ie-on-night)}.ie-copilot{position:relative;width:100%;max-width:760px;justify-self:center;display:grid}.ie-phone-wrap{grid-area:1/1;display:grid;gap:10px;padding:18px;justify-items:end;align-content:start}.ie-tabs{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end}.ie-tabs button{font:500 12.5px/1.2 var(--ie-body);padding:7px 11px;border-radius:999px;border:0;background:rgba(255,252,245,.86);color:var(--ie-ink);cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.15)}.ie-tabs button[aria-selected=true]{color:#fff}.ie-phone{width:min(330px,100%);border-radius:30px;padding:10px;background:#0f1226;box-shadow:0 30px 60px rgba(0,0,0,.35)}.ie-chat{border-radius:22px;overflow:hidden;background:#d9e6c7 linear-gradient(160deg,#e5efd5,#c9dcb4);min-height:400px;display:grid;grid-template-rows:auto 1fr auto}.ie-chat-head{display:flex;align-items:center;gap:10px;padding:10px 12px;background:hsla(0,0%,100%,.92)}.ie-chat-head strong{display:block;font-size:13.5px;line-height:1.2}.ie-chat-head small{display:block;font-size:11.5px;color:var(--ie-ink-soft)}.ie-chat-av{width:34px;height:34px;border-radius:50%;flex:none;background:radial-gradient(circle at 35% 30%,#8dba55,#3e7a4a)}.ie-chat-body{padding:12px 10px;display:grid;gap:8px;align-content:start}.ie-msg{max-width:86%;padding:8px 11px 6px;border-radius:14px;font-size:13.5px;line-height:1.4;display:grid;gap:2px;box-shadow:0 1px 1px rgba(0,0,0,.08)}.ie-msg time{justify-self:end;font-size:10.5px;color:rgba(27,37,89,.5)}.ie-msg-student{justify-self:end;background:#effdde;border-bottom-right-radius:4px}.ie-msg-bot{justify-self:start;background:#fff;border-bottom-left-radius:4px}.ie-msg-cmd span{color:var(--ie-blue)}.ie-msg-photo span:before{content:"";display:block;height:70px;margin-bottom:6px;border-radius:8px;background:repeating-linear-gradient(90deg,#f39a1e 0 24%,#fff 24% 25%),#f39a1e;opacity:.85}.ie-msg-voice span{display:inline-flex;align-items:center;gap:8px}.ie-msg-voice span:before{content:"";width:26px;height:26px;border-radius:50%;background:#4e9a45;flex:none;-webkit-mask:radial-gradient(circle,#000 60%,transparent 62%);mask:radial-gradient(circle,#000 60%,transparent 62%)}.ie.ie-js .ie-chat .ie-msg{opacity:0;translate:0 8px}.ie.ie-js .ie-chat.is-play .ie-msg{animation:ie-msg-in .45s ease forwards;animation-delay:calc(var(--k) * .7s + .2s)}@keyframes ie-msg-in{to{opacity:1;translate:0 0}}.ie-chat-note{padding:10px 12px;font-size:12.5px;line-height:1.4;background:hsla(0,0%,100%,.7);color:var(--ie-ink-soft)}.ie-copilot .ie-fine{color:#f6f1e6;text-shadow:0 1px 4px rgba(0,0,0,.6);max-width:330px;text-align:right}.ie-stairs{width:100%;max-width:620px;justify-self:center;display:grid;gap:12px}.ie-stair-row{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;align-items:end;height:220px}.ie-stair-row li{height:calc(34% + var(--i) * 16.5%);display:flex}.ie-stair-row button{flex:1;border:0;border-radius:12px 12px 4px 4px;cursor:pointer;padding:10px 6px;display:flex;align-items:flex-start;justify-content:center;text-align:center;font:500 13px/1.2 var(--ie-body);color:var(--ie-ink);background:linear-gradient(180deg,rgba(62,122,74,calc(.18 + var(--i) * .06)),rgba(62,122,74,.08));border:1px solid rgba(62,122,74,.25);transition:background-color .2s,color .2s,transform .2s}.ie-stair-row li:nth-child(n+4) button{background:linear-gradient(180deg,rgba(184,100,62,.28),rgba(184,100,62,.08));border-color:rgba(184,100,62,.3)}.ie-stair-row button:hover{transform:translateY(-3px)}.ie-stair-row button[aria-pressed=true]{background:var(--ie-leaf);color:#fff}.ie-stair-row li:nth-child(n+4) button[aria-pressed=true]{background:var(--ie-laterite)}.ie-stair-axis{display:flex;justify-content:space-between;gap:10px;font:500 11px/1.3 var(--ie-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--ie-ink-soft)}.ie-stair-axis span:last-child{text-align:right}.ie-stair-card{min-height:140px;padding:16px 18px;border-radius:14px;background:var(--ie-card);border:1px solid var(--ie-ink-faint)}.ie-stair-card>div{display:grid;gap:6px;font-size:15.5px;line-height:1.5}.ie-stair-k{font:400 22px/1.2 var(--ie-display)}.ie-depts{display:grid;gap:16px}.ie-dept-chips{display:flex;flex-wrap:wrap;gap:8px}.ie-dept-chips button{font:500 14px/1.2 var(--ie-body);padding:10px 15px;border-radius:999px;border:1px solid var(--ie-ink-faint);background:var(--ie-card);color:var(--ie-ink);cursor:pointer;transition:background-color .2s,border-color .2s,color .2s}.ie-dept-chips 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