@charset "UTF-8";
:root{--paper:#f8faf9;--surface:#fff;--ink:#202d29;--muted:#5f6e66;--green:#1e5544;--green-dark:#183e36;--green-soft:#eaf2eb;--line:#dce4de;--lime:#d7ecbd;--code:#192d2b;--orange:#9b5728;--red:#a73535;--sans:Inter,"Noto Sans CJK SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;--mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace;--header:88px;color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:112px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.85;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select,summary{ -webkit-tap-highlight-color:transparent}button,summary{cursor:pointer}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #85b68c;outline-offset:4px}button{color:inherit}input,select{min-width:0;max-width:100%;background:white;border:1px solid #c8d5cd;border-radius:6px;color:var(--ink);padding:8px 10px;min-height:42px}input[type=range]{padding:0;accent-color:var(--green);width:100%;min-height:32px}input[type=radio]{min-height:0;accent-color:var(--green);flex-shrink:0}input[aria-invalid=true]{border-color:var(--red)}[hidden]{display:none!important}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.4;letter-spacing:-.035em}h1{font-size:62px;font-weight:650;line-height:1.25}h2{font-size:28px;font-weight:650}h3{font-size:19px;font-weight:600}p{margin:16px 0}strong{font-weight:650}code{font-family:var(--mono);font-size:.88em;background:#edf2ee;padding:3px 5px;border-radius:4px;overflow-wrap:anywhere}pre{margin:22px 0;overflow:auto;max-width:100%}small{font-size:12px}.skip-link{position:fixed;left:20px;top:-80px;z-index:300;background:var(--green);color:white;padding:10px 18px}.skip-link:focus{top:10px}.site-header{height:var(--header);padding:0 48px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:rgba(248,250,249,.97);position:sticky;top:0;z-index:100;gap:20px}.brand{display:flex;align-items:center;gap:14px;font-size:17px;font-weight:650;line-height:1.5;letter-spacing:.01em}.brand-note{display:block;font-size:10px;letter-spacing:.1em;color:var(--muted);font-weight:450;margin-top:3px}.brand-symbol{width:38px;height:38px;background:var(--green-dark);border-radius:9px;display:grid;place-items:center;flex-shrink:0}.brand-symbol>span{width:20px;height:20px;border:1.5px solid var(--lime);position:relative;display:grid;place-items:center}.brand-symbol>span:before{content:'›';color:var(--lime);font:23px var(--mono);line-height:1;transform:translateY(-2px)}.brand-symbol>span:after{content:'';position:absolute;inset:4px -4px;border-left:2px solid var(--lime);border-right:2px solid var(--lime)}.header-links{display:flex;align-items:center;gap:30px;font-size:13px}.header-links a:hover{color:var(--green)}.header-links a[aria-current=page]{color:var(--green);font-weight:600}.header-links a span{padding-left:5px}.menu-button{display:none;border:0;background:none;padding:6px;font-size:13px}.page-layout{max-width:1440px;margin:auto;display:grid;grid-template-columns:240px minmax(0,1fr)}.sidebar{position:sticky;top:var(--header);height:calc(100dvh - var(--header));max-height:calc(100dvh - var(--header));overflow:auto;border-right:1px solid var(--line);padding:36px 22px 26px 28px;display:flex;flex-direction:column;font-size:13px}.sidebar-label{font-size:10px;letter-spacing:.14em;color:var(--muted);margin-bottom:12px}.sidebar-home{display:flex;justify-content:space-between;font-weight:550}.sidebar-home span{color:var(--muted)}.sidebar-divider{height:1px;background:var(--line);margin:26px 0}.chapter-link{display:flex;gap:11px;align-items:center;border-radius:6px;padding:11px 10px;margin:0 -6px}.chapter-link.is-current{background:var(--green-soft);color:var(--green)}.chapter-link small{display:block;color:var(--muted);font-size:10px;margin-top:3px}.chapter-number{font:16px var(--mono);color:var(--green)}.section-nav{display:flex;flex-direction:column;gap:4px;padding:12px 0 8px}.section-nav a{display:flex;align-items:center;gap:8px;min-height:37px;padding:7px 0;color:var(--muted);font-size:12px}.section-nav a:hover,.section-nav a.is-active{color:var(--green);font-weight:600}.nav-step{font:10px var(--mono);color:var(--muted);width:19px}.section-check{margin-left:auto;color:var(--green)}.section-check.done:after{content:'✓'}.sidebar-bottom{margin-top:auto;padding-top:45px;color:var(--muted)}.sidebar-bottom p{font-size:13px;line-height:1.9;margin:10px 0 18px}.small-overline,.tiny-label{font-size:10px;letter-spacing:.08em}.tiny-label{display:flex;align-items:center;gap:6px}.tiny-label:before{content:'';width:5px;height:5px;border-radius:100%;background:#75a581}.main-content{min-width:0;padding:35px 64px 60px;max-width:1120px;width:100%;outline:none}.breadcrumbs{display:flex;gap:13px;font-size:11px;color:var(--muted);letter-spacing:.04em;align-items:center}.breadcrumbs span{color:#a2afa6}.breadcrumbs a:hover{color:var(--green)}.eyebrow{font-size:10px;letter-spacing:.15em;color:var(--green);font-weight:600;display:flex;align-items:center;gap:10px}.eyebrow-line{height:1px;width:32px;background:#a6b9ab}.status-dot{width:6px;height:6px;background:var(--green);border-radius:100%}.home-hero{padding:64px 0 55px;border-bottom:1px solid var(--line)}.home-hero h1{margin:25px 0 24px;font-size:clamp(32px,4.4vw,60px)}.home-hero h1>span{color:var(--green)}.hero-description{font-size:16px;line-height:1.95;color:var(--muted);max-width:630px;margin:18px 0 26px}.button{display:inline-flex;gap:12px;align-items:center;justify-content:center;border:1px solid #cbd8ce;background:white;padding:11px 18px;border-radius:6px;font-size:13px;font-weight:500;line-height:1.65;transition:background .15s,border-color .15s;white-space:normal}.button:hover:not(:disabled){background:#f0f5f0;border-color:#96b09d}.button-primary{background:var(--green-dark);border-color:var(--green-dark);color:white}.button-primary:hover:not(:disabled){background:#275544;border-color:#275544}.button-quiet{background:transparent;border-color:transparent;color:var(--muted)}.button-small{padding:7px 11px;font-size:12px}.button-row{display:flex;gap:7px;flex-wrap:wrap}.hero-lines{padding-top:45px;color:var(--muted);font-size:11px}.hero-lines>div{font:11px var(--mono);letter-spacing:.1em;display:flex;gap:20px;align-items:center;margin-bottom:8px}.hero-lines>div span{color:var(--green)}.hero-lines>span{font-size:11px}.course-list{padding:44px 0}.section-topline{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}.section-topline h2{margin-top:8px;font-size:24px}.subtle{font-size:11px;color:var(--muted)}.lesson-card{display:flex;align-items:center;gap:24px;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:28px;transition:border-color .2s,transform .2s}.lesson-card:hover{border-color:#8ba896;transform:translateY(-2px)}.lesson-card-number{font:40px var(--mono);color:#8eaa98;line-height:1.5;flex-shrink:0;width:80px;border-right:1px solid var(--line);padding-right:20px}.lesson-card-number span{display:block;font:8px var(--sans);letter-spacing:.12em}.tag{color:var(--green);font-size:10px;background:var(--green-soft);padding:3px 7px;border-radius:3px;display:inline-block}.lesson-card h3{font-size:25px;margin:10px 0 7px}.lesson-card p{font-size:13px;color:var(--muted);margin:0 0 17px}.lesson-card-content{flex:1;min-width:0}.lesson-arrow{align-self:center;font-size:28px;color:var(--green)}.lesson-meta{display:flex;flex-wrap:wrap;gap:8px 0;color:var(--muted);font-size:11px}.lesson-meta>span{display:flex;align-items:center}.lesson-meta>span+span:before{content:'·';padding:0 12px;color:#91a397}.learning-approach{display:grid;grid-template-columns:1fr 1fr;gap:60px;border-top:1px solid var(--line);padding:40px 0 20px}.learning-approach h2{font-size:25px;margin:10px 0}.learning-approach p{font-size:13px;color:var(--muted)}.learning-approach ol{list-style:none;margin:0;padding:0}.learning-approach li{display:flex;gap:18px;padding:12px 0}.learning-approach li>span{font:12px var(--mono);color:var(--green);padding-top:3px}.learning-approach li strong{font-size:14px}.learning-approach li p{font-size:12px;margin:3px 0}.site-footer{max-width:1440px;padding:25px 48px;display:flex;justify-content:space-between;gap:15px;margin:auto;border-top:1px solid var(--line);color:var(--muted);font-size:10px}.lesson-hero{padding:42px 0 28px;border-bottom:1px solid var(--line)}.lesson-hero h1{margin:18px 0 8px;font-size:58px}.title-period{color:#7ca47d}.lesson-hero .hero-description{margin:16px 0 20px}.lesson-progress{display:flex;align-items:center;gap:14px;margin-top:27px;font-size:11px;color:var(--green)}progress{appearance:none;border:0;border-radius:10px;height:4px;flex:1;max-width:170px;overflow:hidden;background:#e0e9e2}progress::-webkit-progress-bar{background:#e0e9e2}progress::-webkit-progress-value{background:var(--green)}progress::-moz-progress-bar{background:var(--green)}.progress-hint{margin-left:auto;font-size:10px;color:var(--muted)}.chapter-intro{display:flex;gap:16px;padding:28px 0 0}.intro-symbol{color:var(--green);font:30px var(--mono);padding-top:9px}.chapter-intro p{color:var(--muted);font-size:13px;margin:10px 0}.chapter-intro strong{color:var(--ink)}.lesson-section{padding:64px 0 24px;scroll-margin-top:110px}.lesson-section+.lesson-section{margin-top:15px;border-top:1px solid var(--line)}.section-heading{display:flex;gap:17px;align-items:center;margin-bottom:20px}.section-index{font:34px var(--mono);font-weight:400;color:#90ac98;line-height:1.2}.section-heading h2{margin-top:6px}.section-lead{font-size:17px;font-weight:500;line-height:1.9;margin:24px 0 20px}.lesson-section>p{line-height:1.95}.lesson-section>h3{margin:34px 0 16px}.flow-diagram{display:flex;align-items:center;gap:10px;justify-content:space-between;padding:22px 0;margin:23px 0 8px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.flow-diagram>span{font-size:13px;font-weight:600}.flow-diagram small{display:block;font-size:10px;font-weight:400;color:var(--muted);margin-top:8px}.flow-diagram b{font-size:14px;font-weight:400;color:#7e9b87}.caption{font-size:11px!important;color:var(--muted);line-height:1.9!important;margin:12px 0!important}.comparison-pair{display:grid;grid-template-columns:1fr 1fr;gap:30px;padding:20px 0}.comparison-pair>div{border-top:2px solid #aac3af;padding-top:17px}.comparison-pair h3{font-size:17px;margin-top:7px}.comparison-pair p{font-size:13px;line-height:1.95;color:var(--muted)}.mini-label{font-size:10px;letter-spacing:.08em;color:var(--green)}.code-block{background:var(--code);color:#e6f0e8;padding:23px 24px;border-radius:8px;font:13px/2 var(--mono);tab-size:4}.code-block code{padding:0;background:transparent;border-radius:0;font:inherit;white-space:pre;overflow-wrap:normal}.code-op{color:#c6e6b3}.code-comment{color:#9ab4a8}.table-scroll{width:100%;overflow-x:auto;margin:20px 0}.data-table{width:100%;border-collapse:collapse;text-align:left;font-size:13px}.data-table th{font-weight:550}.data-table thead th{font-size:11px;font-weight:500;color:var(--muted);background:#eff4f0;white-space:nowrap}.data-table th,.data-table td{border-bottom:1px solid var(--line);padding:12px 13px;vertical-align:top}.data-table tbody th{white-space:nowrap}.data-table code{font-size:12px}.data-table.compact th,.data-table.compact td{padding:5px 11px;font-size:12px}.definition-line{display:flex;flex-wrap:wrap;gap:10px 22px;border-left:2px solid #a5c1a4;padding:7px 0 7px 18px;color:var(--green);font-size:13px}.lab{margin:29px 0 28px;padding:24px;background:var(--surface);border:1px solid #d4e0d6;border-radius:10px;min-width:0}.lab-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:24px}.lab-label{display:block;font-size:9px;letter-spacing:.12em;color:var(--green);margin-bottom:5px}.lab-heading h3{font-size:18px}.lab-chip{font-size:10px;white-space:nowrap;color:var(--green);background:var(--green-soft);border-radius:4px;padding:4px 8px}.lab-controls{display:flex;gap:14px;flex-wrap:wrap;align-items:end;margin:18px 0}.lab-controls>label{display:flex;flex-direction:column;gap:6px;font-size:11px;color:var(--muted);flex:1;min-width:120px}.lab-controls label>input,.lab-controls label>select{width:100%;font-size:13px;color:var(--ink);line-height:1.5}.simulation-layout{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(130px,1fr);gap:20px;margin:23px 0}.panel-label{display:flex;justify-content:space-between;gap:12px;font-size:11px;color:var(--muted);margin-bottom:10px}.panel-label>span{font:9px/1.8 var(--mono);color:var(--muted)}.program-lines{list-style:none;padding:0;margin:0;font:11px/1.8 var(--mono)}.program-lines li{display:flex;align-items:baseline;gap:8px;padding:7px 8px;border-radius:4px;overflow-wrap:anywhere}.program-lines li.is-active{background:var(--green-soft);color:var(--green)}.program-lines .instruction-address{font-size:9px;color:var(--muted);flex-shrink:0}.program-lines .instruction-text{white-space:normal}.program-lines .line-status{font:9px var(--sans);margin-left:auto;flex-shrink:0}.memory-strip{display:flex;gap:9px;margin:10px 0 20px;flex-wrap:wrap}.memory-cell{flex:1;min-width:100px;background:#f0f4f0;padding:12px 15px;border-radius:6px}.memory-cell.changed{background:#e1efd9}.memory-cell>div{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);gap:8px}.memory-cell strong{display:block;font:24px var(--mono);margin-top:7px}.simulation-state tr.changed{background:#e1efd9}.simulation-state td{font-family:var(--mono);text-align:right}.simulation-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}.lab-result{font-size:12px;line-height:1.9;color:var(--green);padding-top:14px;border-top:1px solid var(--line);margin:18px 0 0}.input-error{font-size:12px;color:var(--red);margin:12px 0}.segmented-control{display:flex;background:#f1f5f1;border-radius:6px;padding:3px;align-self:end;min-height:42px;align-items:stretch}.segmented-control button{background:none;border:0;border-radius:4px;padding:6px 15px;font-size:12px;color:var(--muted)}.segmented-control button[aria-pressed=true]{background:var(--green-dark);color:white}.byte-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px;margin:27px 0}.byte-cell{text-align:center;background:#f1f5f1;border-radius:5px;padding:12px 5px}.byte-cell small{display:block;font:10px var(--mono);color:var(--muted)}.byte-cell strong{display:block;font:30px var(--mono);color:var(--green);margin:15px 0}.byte-cell>span{font-size:9px;color:var(--muted)}.format-overview{margin:25px 0}.format-overview>div{display:grid;grid-template-columns:48px minmax(0,1fr);gap:6px 15px;padding:17px 0;border-bottom:1px solid var(--line)}.format-overview strong{grid-row:span 2;color:var(--green);font-size:15px}.format-overview code{font-size:12px;background:transparent;padding:0;line-height:1.9}.format-overview>div>span{font-size:12px;color:var(--muted)}.assembly-preview{background:var(--code);color:var(--lime);font:14px/1.8 var(--mono);padding:15px;border-radius:5px;margin:22px 0;overflow-wrap:anywhere}.bit-fields{display:flex;gap:5px;flex-wrap:wrap}.bit-field{min-width:60px;flex:var(--bits) 1 0%;text-align:center;padding:10px 3px;background:#eef3ee;border-radius:4px}.bit-field.op-field{background:#dfece1}.bit-field.function-field{background:#f3eadf}.bit-field strong{display:block;font:12px var(--mono);white-space:nowrap;margin:8px 0}.bit-field>span{font:10px var(--mono);color:var(--muted)}.bit-field small{display:block;color:var(--muted);font-size:9px;line-height:1.8}.encoding-result{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:22px;padding-top:17px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}.encoding-result strong{font:23px var(--mono);color:var(--green)}.formula{font-size:15px;font-weight:550;color:var(--green);padding:18px 22px;border-left:3px solid #8eb18a;background:#edf3ec;margin:23px 0;overflow-wrap:anywhere}.array-cells{display:flex;gap:7px;margin:22px 0;flex-wrap:wrap}.array-cell{flex:1;min-width:80px;padding:12px 5px;border-radius:5px;text-align:center;background:#f0f4f0}.array-cell.selected{background:var(--green-dark);color:white}.array-cell strong{display:block;font:14px var(--mono);margin-bottom:8px}.array-cell small{font:11px var(--mono);color:var(--muted)}.array-cell.selected small{color:#d2e3d3}.range-label output{float:right;font:14px var(--mono);color:var(--green)}.generated-code{display:block;background:none;padding:14px 0 0;color:var(--green);font-size:13px}.note{border-left:3px solid #afc4ab;padding:16px 21px;background:#edf3ec;margin:25px 0;font-size:13px}.note strong{color:var(--green);font-size:13px}.note p{margin:7px 0 0}.jump-concatenation{display:flex;gap:5px;margin:23px 0;text-align:center}.jump-concatenation>span{padding:15px 8px;background:#e6eee5;flex:4;font-size:12px;border-radius:4px}.jump-concatenation>span:nth-child(2){flex:12;background:#dcebdc}.jump-concatenation>span:last-child{flex:2;background:#edf1ec}.jump-concatenation small{display:block;color:var(--muted);margin-top:8px;font-size:10px}.branch-calculation{display:flex;flex-direction:column;gap:7px;padding:18px 0;margin:5px 0;font:12px/1.9 var(--mono);overflow-wrap:anywhere}.branch-calculation>div{display:flex;justify-content:space-between;gap:15px}.branch-calculation span{color:var(--muted)}.branch-output{display:flex;align-items:center;justify-content:space-between;padding:20px 0 8px;border-top:1px solid var(--line);gap:12px}.branch-output>span{font-size:11px;color:var(--muted)}.branch-output>strong{font:27px var(--mono);color:var(--green)}.complete-button{display:flex;justify-content:space-between;gap:26px;align-items:center;background:transparent;border:0;border-top:1px solid var(--line);width:100%;padding:18px 0 5px;margin-top:32px;color:var(--muted);font-size:12px;text-align:left}.complete-button>span{display:grid;place-items:center;width:22px;height:22px;border:1px solid #c5d4c9;border-radius:100%;color:transparent}.complete-button[aria-pressed=true]{color:var(--green)}.complete-button[aria-pressed=true]>span{background:var(--green);border-color:var(--green);color:white}.complete-button:hover{color:var(--green)}.quiz-form{margin-top:35px}.quiz-question{margin:0 0 27px;padding:0 0 27px;min-width:0;border:0;border-bottom:1px solid var(--line)}.quiz-question legend{font-size:14px;font-weight:550;margin-bottom:14px;line-height:1.9;padding:0;width:100%;overflow-wrap:anywhere}.quiz-question legend>span{font:11px var(--mono);color:var(--green);display:inline-block;margin-right:10px}.radio-option{display:flex;align-items:baseline;gap:10px;padding:7px 0;font-size:13px}.radio-option input{margin:0;align-self:center;width:15px;height:15px}.answer-label{display:flex;flex-direction:column;gap:6px;font-size:10px;color:var(--muted);max-width:280px}.answer-label input{font-size:14px;font-family:var(--mono);width:100%}.quiz-feedback{font-size:12px;margin:15px 0 0;line-height:1.9}.quiz-feedback.correct{color:var(--green)}.quiz-feedback.incorrect{color:var(--red)}.quiz-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.quiz-actions p{font-size:11px;color:var(--muted);margin:0;flex-basis:100%}.solution{margin-top:35px;border-top:1px solid var(--line);padding-top:22px}.solution summary{font-size:13px;color:var(--green)}.solution p{font-size:13px}.references{margin-top:55px;border-top:1px solid var(--line);padding-top:35px}.references h2{font-size:20px;margin-top:9px}.references p{font-size:12px;line-height:1.95;color:var(--muted)}.references>a{display:block;font-size:11px;color:var(--green);margin:9px 0;text-decoration:underline;text-underline-offset:3px}.chapter-end{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:40px;padding-top:25px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}.chapter-end a{font-size:13px;color:var(--green)}.mobile-menu{border:1px solid var(--line);border-radius:10px;padding:22px;width:min(92vw,400px);max-height:85dvh;color:var(--ink);background:var(--paper);overflow:auto}.mobile-menu::backdrop{background:#1d302a80}.mobile-menu-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.mobile-menu .sidebar-bottom{display:none}.mobile-menu .section-nav a{font-size:14px;padding:12px 0}.mobile-menu .chapter-link{font-size:14px}
@media(min-width:1441px){.site-header{padding-left:max(48px,calc((100vw - 1344px)/2));padding-right:max(48px,calc((100vw - 1344px)/2))}}
@media(max-width:1100px){.site-header{padding:0 28px}.page-layout{grid-template-columns:210px minmax(0,1fr)}.sidebar{padding-left:22px;padding-right:16px}.main-content{padding-left:36px;padding-right:36px}.section-nav a{font-size:11px}.home-hero h1{font-size:46px}.lesson-hero h1{font-size:50px}.progress-hint{display:none}.simulation-layout{grid-template-columns:minmax(0,1.6fr) minmax(100px,1fr);gap:12px}.program-lines .instruction-address{display:none}.bit-fields{gap:4px}.bit-field strong{font-size:11px}.learning-approach{gap:30px}}
@media(max-width:760px){:root{--header:72px}.site-header{padding:0 20px}.brand{font-size:14px;gap:10px}.brand-note{font-size:8px}.brand-symbol{height:32px;width:32px}.header-links{gap:16px;font-size:12px}.header-links>a:first-child{display:none}.menu-button{display:inline-flex;gap:8px;align-items:center}.page-layout{display:block}.sidebar{display:none}.main-content{padding:24px 24px 45px;max-width:720px;margin:auto}.home-hero{padding-top:40px}.home-hero h1{font-size:43px}.lesson-hero{padding-top:30px}.lesson-hero h1{font-size:46px}.hero-description{font-size:15px}.lesson-section{padding-top:46px}.site-footer{padding:23px 24px;flex-wrap:wrap}.site-footer>span:nth-child(2){display:none}.lesson-card{padding:23px 20px;gap:18px}.lesson-card-number{width:65px;font-size:33px;padding-right:14px}.lesson-card h3{font-size:23px}.lab{padding:20px}.program-lines .instruction-address{display:inline}.learning-approach{gap:28px}.flow-diagram{gap:6px}.flow-diagram>span{font-size:12px}.flow-diagram small{font-size:9px}.section-heading h2{font-size:25px}.panel-label>span{font-size:9px}}
@media(max-width:480px){body{font-size:14px}.main-content{padding:23px 18px 35px}.site-header{padding:0 16px}.header-links{gap:10px}.header-links>a{font-size:11px}.brand-note{font-size:7px}.brand{font-size:13px}.brand-symbol{width:30px;height:30px}.home-hero h1{font-size:34px}.home-hero{padding-top:35px}.hero-description{font-size:14px}.hero-lines>div{font-size:9px;gap:9px;letter-spacing:0}.hero-lines{padding-top:30px}.section-topline{align-items:start}.section-topline>.subtle{max-width:80px;text-align:right}.lesson-card{gap:13px;padding:20px 16px}.lesson-card-number{font-size:28px;width:48px;padding-right:8px}.lesson-card-number span{font-size:6px}.lesson-card h3{font-size:22px}.lesson-card p{font-size:12px}.lesson-arrow{font-size:22px}.lesson-meta{font-size:10px}.lesson-meta>span+span:before{padding:0 8px}.learning-approach{grid-template-columns:1fr;gap:15px}.learning-approach li{padding:9px 0}.lesson-hero h1{font-size:40px}.breadcrumbs{font-size:10px}.chapter-intro{gap:10px}.chapter-intro p{font-size:12px}.section-index{font-size:28px}.section-heading{gap:12px}.section-heading h2{font-size:24px}.eyebrow{font-size:9px}.section-lead{font-size:16px}.comparison-pair{grid-template-columns:1fr;gap:13px;padding:8px 0}.comparison-pair p{margin-bottom:5px}.flow-diagram{display:grid;grid-template-columns:1fr 18px 1fr;gap:18px 8px}.flow-diagram>b:nth-of-type(2){display:none}.code-block{padding:17px 15px;font-size:11px;line-height:2.1}.lab{padding:17px 14px;margin:24px 0}.lab-heading{gap:8px;margin-bottom:18px}.lab-heading h3{font-size:16px}.lab-chip{font-size:9px;padding:3px 6px}.lab-controls{gap:10px}.lab-controls>label{min-width:110px}.lab-controls label>input,.lab-controls label>select{font-size:16px;min-height:44px}.simulation-layout{grid-template-columns:minmax(0,1fr);gap:18px}.simulation-state .data-table tbody{display:table-row-group}.simulation-state th,.simulation-state td{font-size:12px}.program-lines{font-size:12px}.program-lines .instruction-address{font-size:10px}.simulation-state{max-width:100%}.simulation-state .data-table.compact th,.simulation-state .data-table.compact td{padding:4px 10px}.panel-label{font-size:10px}.panel-label>span{font-size:8px}.button-small{padding:8px 9px;font-size:11px}.memory-cell{min-width:75px;padding:11px}.memory-cell strong{font-size:22px}.byte-strip{gap:5px}.byte-cell strong{font-size:25px}.byte-cell small{font-size:8px}.byte-cell>span{font-size:8px}.segmented-control{min-height:44px}.format-overview>div{grid-template-columns:38px minmax(0,1fr);gap:5px 8px}.format-overview code{font-size:10px}.format-overview>div>span{font-size:11px}.bit-field{min-width:72px;flex-basis:26%}.bit-field strong{font-size:12px}.bit-field[style*="16"]{flex-basis:100%}.encoding-result strong{font-size:20px}.formula{font-size:13px;padding:15px}.branch-output strong{font-size:23px}.branch-output span{font-size:10px}.jump-concatenation>span{font-size:10px;padding:12px 5px}.jump-concatenation small{font-size:9px}.data-table th,.data-table td{padding:10px;font-size:12px}.data-table code{font-size:11px}.quiz-question legend{font-size:13px}.quiz-actions .button{padding:10px 15px}.chapter-end>span{font-size:9px;max-width:140px}.chapter-end a{font-size:12px}.answer-label input{font-size:16px}.note{padding:14px 16px}}
@media(pointer:coarse){button,.button,.menu-button,summary{min-height:44px}.radio-option{min-height:44px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}