html{scroll-padding-top:132px}
:root{--ink:#080b10;--ink-soft:#10141b;--paper:#f1f0ea;--lime:#c8ff3d;--muted:#a5a79f;--line:rgba(241,240,234,.18);--dark-line:rgba(8,11,16,.17);--blue:#62c8ff}
body{background:var(--ink);color:var(--paper);font-family:Manrope,system-ui,sans-serif}
.mini-nav{display:flex;gap:22px}.mini-nav a{color:var(--muted);font-size:.78rem;text-decoration:none}.mini-nav a:hover{color:var(--lime)}
.logic-hero{min-height:calc(100svh - 76px);display:grid;grid-template-columns:minmax(0,1.1fr) minmax(340px,.9fr);gap:clamp(34px,5vw,88px);align-items:center;padding:clamp(54px,6vw,90px) clamp(24px,6vw,108px)}.logic-hero>*{position:relative;z-index:1;min-width:0}.logic-hero h1{margin:20px 0 26px;font-size:clamp(3.7rem,6.6vw,8rem);line-height:.88;letter-spacing:-.075em}.logic-hero h1 span{color:var(--lime)}.hero-lead{max-width:780px;color:#d9dcd7;font-size:clamp(1.05rem,1.48vw,1.42rem);line-height:1.55}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.action{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border:1px solid var(--line);color:var(--paper);font:700 .69rem DM Mono,monospace;letter-spacing:.04em;text-align:center;text-decoration:none;text-transform:uppercase}.action.primary{background:var(--lime);border-color:var(--lime);color:var(--ink)}.action.secondary:hover{border-color:var(--lime);color:var(--lime)}
.hero-board{border:1px solid rgba(200,255,61,.48);background:#0b1118;box-shadow:20px 20px 0 rgba(200,255,61,.05)}.board-top{display:flex;justify-content:space-between;gap:12px;padding:15px 20px;border-bottom:1px solid var(--line);color:var(--lime);font:700 .63rem DM Mono,monospace;letter-spacing:.05em}.hero-board pre{margin:0;padding:24px;overflow:auto;color:#e8ece7;font:500 clamp(.76rem,1.08vw,1rem)/1.85 DM Mono,monospace}.hero-board p{margin:0;padding:18px 24px;border-top:1px solid var(--line);color:#b8c0bb;font-size:.86rem;line-height:1.55}.code-comment{color:#90a2aa}.code-keyword{color:var(--blue)}.code-string{color:var(--lime)}
.logic-path{position:sticky;top:76px;z-index:50;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));background:var(--ink);border-block:1px solid var(--line)}.logic-path a{padding:16px 10px;border-right:1px solid var(--line);color:#b3b7b1;font:700 .63rem DM Mono,monospace;letter-spacing:.025em;text-align:center;text-decoration:none;text-transform:uppercase}.logic-path a:last-child{border-right:0}.logic-path a:hover,.logic-path a:focus-visible{background:var(--lime);color:var(--ink)}
.logic-section{padding:clamp(72px,8vw,118px) clamp(24px,6vw,108px);border-bottom:1px solid var(--dark-line)}.logic-section.light{background:var(--paper);color:var(--ink)}.logic-section.dark,.logic-section.lab-section{background:var(--ink);color:var(--paper)}.section-heading{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.47fr);align-items:end;gap:clamp(22px,4vw,60px);margin-bottom:36px}.eyebrow{margin:0 0 12px;color:#526d06;font:700 .68rem DM Mono,monospace;letter-spacing:.09em;text-transform:uppercase}.dark .eyebrow,.lab-section .eyebrow{color:var(--lime)}.section-heading h2{max-width:980px;margin:0;font-size:clamp(2.3rem,4.6vw,5.2rem);line-height:.98;letter-spacing:-.058em}.section-heading h2 em{color:#628209;font-style:normal}.section-heading>p{margin:0;color:#50585b;line-height:1.65}.dark .section-heading>p,.lab-section .section-heading>p{color:#b8bdb7}
.problem-flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;border:1px solid var(--dark-line);background:#fafaf7}.problem-flow>div{min-width:0;padding:clamp(22px,3vw,42px)}.problem-flow>i{align-self:center;color:#648508;font-size:2rem;font-style:normal}.problem-flow span{color:#526d06;font:700 .67rem DM Mono,monospace;text-transform:uppercase}.problem-flow strong{display:block;margin-top:14px;font-size:clamp(1.15rem,1.8vw,1.7rem);letter-spacing:-.035em}.problem-flow p{margin:9px 0 0;color:#555c5d;line-height:1.5}.example-strip{display:grid;grid-template-columns:180px 1fr;gap:24px;margin-top:14px;padding:25px;border-left:4px solid #7fa800;background:#e4ebd5}.example-strip b{color:#526d06;font:700 .66rem DM Mono,monospace;text-transform:uppercase}.example-strip p{margin:0;line-height:1.65}
.concept-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.concept-grid article{display:flex;flex-direction:column;min-width:0;min-height:270px;padding:27px;border:1px solid var(--line);background:#0d131b}.concept-grid article>span{color:var(--blue);font:700 .62rem DM Mono,monospace;letter-spacing:.05em}.concept-grid h3{margin:22px 0 9px;font-size:clamp(1.35rem,2vw,2rem);letter-spacing:-.04em}.concept-grid p{margin:0;color:#bec3bd;line-height:1.58}.concept-grid code{display:block;width:100%;margin-top:auto;padding-top:20px;color:var(--lime);font:500 .8rem DM Mono,monospace;overflow-wrap:anywhere}.logic-note{display:grid;grid-template-columns:190px 1fr;gap:22px;margin-top:14px;padding:22px 26px;border-left:3px solid var(--lime);background:rgba(200,255,61,.08);line-height:1.55}.logic-note b{color:var(--lime);font:700 .68rem DM Mono,monospace;text-transform:uppercase}.logic-note span{color:#d5d9d2}.logic-note code{color:var(--lime)}
.learning-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:0;padding:0;list-style:none;counter-reset:learning}.learning-steps li{min-height:178px;padding:25px;border:1px solid var(--dark-line);background:#fff;counter-increment:learning}.learning-steps li:before{content:'0' counter(learning);display:block;margin-bottom:22px;color:#526d06;font:700 .65rem DM Mono,monospace}.learning-steps b{display:block;font-size:1.15rem;letter-spacing:-.025em}.learning-steps p{margin:9px 0 0;color:#51585a;font-size:.88rem;line-height:1.55}.learning-steps a,.finish-panel a:not(.action){text-decoration-color:#82a51d;text-underline-offset:3px}.worked-example{display:grid;grid-template-columns:minmax(0,.75fr) minmax(0,1.25fr);gap:22px;align-items:center;margin-top:14px;padding:30px;background:#e5e8dc;border:1px solid var(--dark-line)}.worked-example h3{margin:0 0 12px;font-size:clamp(1.4rem,2.4vw,2.3rem);letter-spacing:-.045em}.worked-example p:last-child{color:#4e5555;line-height:1.65}.worked-example pre{margin:0;padding:24px;overflow:auto;background:var(--ink);color:#e7ebe6;font:500 .86rem/1.85 DM Mono,monospace}.worked-example pre span{color:var(--lime)}
.lab-section{background:#0b1118!important}.lab-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.lab-card{display:flex;flex-direction:column;min-width:0;padding:clamp(23px,3vw,36px);border:1px solid var(--line);background:#080d13}.lab-title span{color:var(--blue);font:700 .65rem DM Mono,monospace;letter-spacing:.06em}.lab-title h3{margin:14px 0 8px;font-size:clamp(1.7rem,2.6vw,2.65rem);letter-spacing:-.05em}.lab-title p{margin:0;color:#bec3bf;line-height:1.58}.lab-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:24px 0 16px}.lab-fields label,.prediction{display:grid;gap:8px;color:var(--lime);font:700 .68rem DM Mono,monospace;text-transform:uppercase}.lab-fields input,.prediction select{width:100%;min-width:0;height:44px;padding:8px 12px;border:1px solid var(--line);border-radius:0;background:#111b24;color:var(--paper);font:500 1rem Manrope,sans-serif}.lab-fields input:focus-visible,.prediction select:focus-visible{outline:2px solid var(--lime);outline-offset:2px}.run-button{width:100%;min-height:44px;margin-top:16px;padding:10px;border:1px solid var(--lime);border-radius:0;background:var(--lime);color:var(--ink);cursor:pointer;font:700 .7rem DM Mono,monospace;text-transform:uppercase}.run-button:hover{background:#d7ff74}.lab-output{min-height:142px;margin-top:14px;padding:21px;border:1px solid var(--line);background:#111820}.lab-output>span{color:var(--blue);font:700 .63rem DM Mono,monospace;text-transform:uppercase}.lab-output p{margin:11px 0;color:#d1d7d0;line-height:1.58}.lab-output strong{color:var(--lime)}.lab-output ol{margin:12px 0 0;padding-left:22px;color:#d1d7d0;line-height:1.75}.lab-output .error{color:#ff948c}.lab-output table{width:100%;min-width:0;margin-top:14px;border-collapse:collapse;color:#e9ede6;font:500 .8rem DM Mono,monospace}.lab-output th,.lab-output td{padding:8px;text-align:left;border-bottom:1px solid var(--line)}.lab-output th{color:var(--lime)}.lab-boundary{max-width:900px;margin:19px 0 0;color:#9aa39f;font-size:.82rem;line-height:1.55}
.fridge-challenge{margin-top:14px;padding:clamp(23px,3vw,36px);border:1px solid rgba(200,255,61,.5);background:#101817}.fridge-intro{max-width:900px}.fridge-intro h3{margin:8px 0 12px;font-size:clamp(1.8rem,3.3vw,3.5rem);line-height:1.05;letter-spacing:-.055em}.fridge-intro>p:last-child,.fridge-branch>p:not(.fridge-label){color:#c5cec7;line-height:1.6}.fridge-workspace{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(20px,4vw,60px);margin-top:24px}.fridge-label{margin:0 0 14px;color:var(--lime);font:700 .72rem DM Mono,monospace;text-transform:uppercase}.fridge-steps{display:grid;gap:7px;margin:0;padding:0;list-style:none;counter-reset:fridge}.fridge-steps li{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:55px;padding:7px 8px 7px 14px;border:1px solid var(--line);background:#0a1017;counter-increment:fridge}.fridge-steps li>span{display:flex;align-items:center;gap:13px;font-size:.94rem;line-height:1.35}.fridge-steps li>span:before{content:counter(fridge,decimal-leading-zero);color:var(--blue);font:700 .66rem DM Mono,monospace}.fridge-move{display:flex;gap:5px;flex:0 0 auto}.fridge-move button{width:36px;height:36px;border:1px solid var(--line);background:#17222a;color:var(--paper);cursor:pointer;font-size:1.1rem}.fridge-move button:hover:not(:disabled),.fridge-move button:focus-visible{border-color:var(--lime);color:var(--lime)}.fridge-move button:disabled{opacity:.35;cursor:default}.fridge-options{display:grid;gap:8px;margin-top:22px}.fridge-options label{display:flex;align-items:flex-start;gap:10px;padding:13px;border:1px solid var(--line);background:#0a1017;cursor:pointer;line-height:1.45}.fridge-options label:hover{border-color:var(--lime)}.fridge-options input{flex:0 0 auto;margin-top:4px;accent-color:var(--lime)}.fridge-result{min-height:110px}
.quiz-toolbar{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:14px;padding:18px 20px;border:1px solid var(--dark-line);background:#e3e7d9}.quiz-toolbar strong{color:#263400;font-size:1rem}.quiz-toolbar button{padding:9px 12px;border:1px solid var(--dark-line);background:transparent;color:var(--ink);cursor:pointer;font:700 .62rem DM Mono,monospace;text-transform:uppercase}.quiz-toolbar button:hover{background:var(--ink);color:var(--paper)}.exercise-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.exercise{display:flex;flex-direction:column;min-width:0;padding:clamp(22px,3vw,32px);border:1px solid var(--dark-line);background:#fff}.exercise.is-solved{border-color:#78a500;box-shadow:inset 4px 0 #78a500}.exercise-kicker{color:#536f06;font:700 .64rem DM Mono,monospace;text-transform:uppercase}.exercise h3{margin:13px 0 8px;font-size:clamp(1.22rem,1.9vw,1.8rem);line-height:1.2;letter-spacing:-.035em}.exercise p{margin:0;color:#505657;line-height:1.55}.exercise pre{margin:17px 0;padding:16px;overflow:auto;background:#0a0f15;color:#e6ebe5;font:500 .78rem/1.7 DM Mono,monospace}.exercise-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:18px 0 0}.exercise-options label{display:flex;gap:9px;align-items:center;min-height:42px;padding:9px 12px;border:1px solid var(--dark-line);cursor:pointer;font-weight:700}.exercise-options label:hover{border-color:#80a824}.exercise-options input{accent-color:#526d06}.exercise-answer{display:grid;gap:8px;margin:18px 0 0;color:#526d06;font:700 .67rem DM Mono,monospace;text-transform:uppercase}.exercise-answer input{height:44px;padding:9px 12px;border:1px solid var(--dark-line);border-radius:0;color:var(--ink);background:#fff;font:600 1rem Manrope,sans-serif}.exercise-check{align-self:flex-start;margin-top:auto;padding:11px 17px;border:0;border-radius:0;background:var(--ink);color:var(--paper);cursor:pointer;font:700 .65rem DM Mono,monospace;text-transform:uppercase}.exercise-check:hover{background:#526d06}.exercise-controls{padding-top:20px}.exercise-feedback{min-height:50px;margin-top:15px;padding:13px;border-left:3px solid #a5a79f;background:#eef0ea;color:#323c37;font-size:.84rem;line-height:1.55}.exercise-feedback[data-state="right"]{border-color:#78a500;background:#e7f1d6}.exercise-feedback[data-state="wrong"]{border-color:#dc5f50;background:#fae7e4}.finish-panel{display:flex;justify-content:space-between;align-items:center;gap:30px;margin-top:14px;padding:clamp(25px,4vw,46px);border:1px solid var(--dark-line);background:#dee9c8}.finish-panel h3{margin:0 0 10px;font-size:clamp(1.5rem,2.8vw,2.7rem);letter-spacing:-.045em}.finish-panel p:last-child{max-width:850px;margin:0;color:#424d41;line-height:1.6}.finish-panel .action{flex:0 0 auto}
.logic-footer{display:grid;grid-template-columns:1fr auto auto;gap:24px;align-items:center;padding:28px clamp(24px,6vw,108px);color:var(--muted);font-size:.82rem}.logic-footer a{color:var(--paper);text-decoration:none}
.logic-video{background:#0b1118!important}.logic-video .section-heading h2{max-width:1050px}.logic-video-card{display:grid;grid-template-columns:minmax(0,1fr) minmax(250px,.56fr);min-height:340px;border:1px solid rgba(200,255,61,.45);background:linear-gradient(125deg,#122017 0%,#101c19 48%,#080d13 100%)}.logic-video-copy{align-self:center;padding:clamp(26px,4vw,58px)}.logic-video-kicker{color:var(--lime);font:700 .67rem DM Mono,monospace;letter-spacing:.06em}.logic-video-copy h3{max-width:780px;margin:18px 0 14px;font-size:clamp(2rem,3.5vw,4rem);line-height:1.04;letter-spacing:-.055em}.logic-video-copy p{max-width:640px;margin:0;color:#bbc6bf;line-height:1.6}.logic-video-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}.logic-video-play{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:19px;min-height:240px;border-left:1px solid rgba(200,255,61,.3);background:radial-gradient(circle at 50% 50%,rgba(200,255,61,.14),transparent 55%),repeating-linear-gradient(90deg,transparent 0 79px,rgba(200,255,61,.06) 80px);color:var(--paper);text-decoration:none}.logic-video-play span{display:grid;place-items:center;width:104px;height:104px;padding-left:6px;border:2px solid var(--lime);border-radius:50%;color:var(--lime);font-size:2.6rem;transition:transform .2s,background .2s}.logic-video-play:hover span,.logic-video-play:focus-visible span{transform:scale(1.07);background:rgba(200,255,61,.12)}.logic-video-play small{font:700 .66rem DM Mono,monospace;letter-spacing:.08em}
@media(max-width:800px){.logic-video-card{grid-template-columns:1fr}.logic-video-play{min-height:210px;border-left:0;border-top:1px solid rgba(200,255,61,.3)}}
@media(max-width:1080px){.mini-nav{display:none}.logic-hero,.section-heading{grid-template-columns:1fr}.logic-hero{min-height:auto}.hero-board{max-width:760px}.concept-grid,.learning-steps{grid-template-columns:repeat(2,minmax(0,1fr))}.section-heading>p{max-width:760px}.logic-path{overflow:auto;grid-template-columns:repeat(5,minmax(145px,1fr))}}
@media(max-width:720px){.logic-hero{gap:35px;padding:58px 20px}.logic-hero h1{font-size:clamp(3rem,10.5vw,5rem);overflow-wrap:anywhere}.logic-path{top:66px}.logic-section{padding:68px 20px}.section-heading h2{font-size:clamp(2.3rem,8vw,3.6rem)}.problem-flow{grid-template-columns:1fr}.problem-flow>i{padding-left:24px;line-height:1}.example-strip,.logic-note,.worked-example,.lab-grid,.exercise-grid{grid-template-columns:1fr}.concept-grid,.learning-steps{grid-template-columns:1fr}.concept-grid article{min-height:215px}.worked-example{padding:20px}.lab-fields{grid-template-columns:1fr}.quiz-toolbar,.finish-panel{align-items:stretch;flex-direction:column}.exercise-options{grid-template-columns:1fr}.logic-footer{grid-template-columns:1fr}.hero-board pre{font-size:.73rem}}

@media(max-width:720px){html{scroll-padding-top:122px}}
@media(max-width:900px){.fridge-workspace{grid-template-columns:1fr}}
@media(max-width:540px){.fridge-challenge{padding:20px}.fridge-steps li>span{font-size:.84rem}.fridge-move button{width:32px;height:34px}}