@font-face{font-family:Atkinson Hyperlegible;font-style:normal;font-display:swap;font-weight:400;src:url(./atkinson-hyperlegible-latin-ext-400-normal-DRk46D-x.woff2) format("woff2"),url(./atkinson-hyperlegible-latin-ext-400-normal-Bbz-b3yf.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Atkinson Hyperlegible;font-style:normal;font-display:swap;font-weight:400;src:url(./atkinson-hyperlegible-latin-400-normal-BrHNak5F.woff2) format("woff2"),url(./atkinson-hyperlegible-latin-400-normal-BbWidj28.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Atkinson Hyperlegible;font-style:normal;font-display:swap;font-weight:700;src:url(./atkinson-hyperlegible-latin-ext-700-normal-BoVPHkS0.woff2) format("woff2"),url(./atkinson-hyperlegible-latin-ext-700-normal-CKkU2Dpt.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Atkinson Hyperlegible;font-style:normal;font-display:swap;font-weight:700;src:url(./atkinson-hyperlegible-latin-700-normal-GZI4o3u0.woff2) format("woff2"),url(./atkinson-hyperlegible-latin-700-normal-BK6Glc0m.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{font-family:Atkinson Hyperlegible,Segoe UI,system-ui,sans-serif;color:#121820;background:#fff;font-synthesis:none;text-rendering:optimizeLegibility;--bg: #ffffff;--surface: #f4f7fa;--surface-strong: #eaf0f5;--text: #121820;--muted: #5d6875;--faint: #7b8794;--border: #d5dce3;--border-strong: #a9b5c0;--blue: #0078d4;--blue-strong: #005ea8;--button-blue: #0078d4;--blue-soft: #e9f4fc;--amber: #a95c00;--amber-soft: #fff6e8;--green: #107c10;--green-soft: #ecf8ec;--red: #c42b1c;--red-soft: #fff0ee;--shadow: 0 8px 24px rgba(22, 35, 48, .1);--topbar: 60px;color-scheme:light}:root[data-theme=dark]{--bg: #0e1620;--surface: #141e29;--surface-strong: #1b2835;--text: #f5f7fa;--muted: #b9c4cf;--faint: #94a4b3;--border: #31404f;--border-strong: #536577;--blue: #3aa0f3;--blue-strong: #73bcf5;--button-blue: #0078d4;--blue-soft: #102b40;--amber: #f5b642;--amber-soft: #302614;--green: #4ccb72;--green-soft: #132b1d;--red: #ff7262;--red-soft: #341b1b;--shadow: 0 10px 28px rgba(0, 0, 0, .3);color-scheme:dark}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh;color:var(--text);background:var(--bg)}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:var(--blue);text-decoration-thickness:1px;text-underline-offset:3px}button{color:inherit}:focus-visible{outline:3px solid color-mix(in srgb,var(--blue) 65%,transparent);outline-offset:2px}::selection{background:var(--blue);color:#fff}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(2.15rem,4vw,3.6rem);line-height:.98;letter-spacing:-.032em;margin-bottom:18px;text-wrap:balance}h2{font-size:clamp(1.45rem,2vw,2rem);line-height:1.12;letter-spacing:-.02em}h3{font-size:1.12rem;line-height:1.3}p{line-height:1.58}code,kbd,.chapter-number,.question-type,.section-label,.chapter-ratio,.source-material details,.practice-header strong,.missed-heading strong{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;z-index:1000;left:12px;top:-80px;padding:12px 16px;background:var(--text);color:var(--bg)}.skip-link:focus{top:12px}.topbar{height:var(--topbar);position:sticky;top:0;z-index:40;display:grid;grid-template-columns:auto minmax(220px,600px) auto auto;align-items:center;gap:22px;padding:0 24px;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--bg) 96%,transparent)}.brand{color:var(--text);text-decoration:none;font-size:1.35rem;font-weight:700;letter-spacing:-.02em;white-space:nowrap}.brand span{font-weight:400}.icon-button{width:42px;height:42px;display:inline-grid;place-items:center;border:0;background:transparent;cursor:pointer;border-radius:4px}.icon-button:hover{background:var(--surface-strong)}.icon-button svg{width:20px;height:20px}.menu-button{display:none}.search-box{position:relative;width:100%;justify-self:center}.search-box>svg{position:absolute;left:13px;top:12px;width:18px;color:var(--muted);pointer-events:none}.search-box input{width:100%;height:40px;padding:0 48px 0 42px;color:var(--text);background:var(--bg);border:1px solid var(--border-strong);border-radius:4px;font-size:.95rem}.search-box input::placeholder{color:var(--muted)}.search-box kbd{position:absolute;right:10px;top:9px;min-width:22px;padding:2px 6px;color:var(--muted);background:var(--surface);border:1px solid var(--border);border-radius:3px;text-align:center;font-size:.75rem}.search-results{position:absolute;top:46px;left:0;right:0;z-index:60;padding:8px;background:var(--bg);border:1px solid var(--border-strong);box-shadow:var(--shadow)}.search-results button{width:100%;display:grid;grid-template-columns:1fr auto;gap:12px;padding:11px 10px;text-align:left;background:transparent;border:0;border-bottom:1px solid var(--border);cursor:pointer}.search-results button:last-child{border-bottom:0}.search-results button:hover{background:var(--surface)}.search-results button span{color:var(--muted)}.search-results p{margin:8px;color:var(--muted)}.overall-progress{width:150px;display:grid;gap:4px;font-size:.78rem;font-weight:700;white-space:nowrap}progress{width:100%;height:4px;border:0;border-radius:0;overflow:hidden;background:var(--surface-strong)}progress::-webkit-progress-bar{background:var(--surface-strong)}progress::-webkit-progress-value{background:var(--blue)}progress::-moz-progress-bar{background:var(--blue)}.shell-body{min-height:calc(100vh - var(--topbar));display:grid;grid-template-columns:270px minmax(0,1fr)}.course-sidebar{position:sticky;top:var(--topbar);align-self:start;height:calc(100vh - var(--topbar));display:flex;flex-direction:column;overflow-y:auto;background:var(--bg);border-right:1px solid var(--border)}.sidebar-heading{min-height:54px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid var(--border);font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.sidebar-close{display:none}.chapter-nav{border-bottom:1px solid var(--border)}.chapter-nav summary{min-height:52px;display:grid;grid-template-columns:28px minmax(0,1fr) auto 16px 16px;align-items:center;gap:8px;padding:0 14px;cursor:pointer;list-style:none;font-size:.95rem}.chapter-nav summary::-webkit-details-marker{display:none}.chapter-nav[open] summary{color:var(--blue);font-weight:700}.chapter-number{font-size:.78rem;color:var(--muted)}.chapter-ratio{color:var(--muted);font-size:.65rem;font-weight:400}.status-icon{width:15px;height:15px;color:var(--border-strong);flex:0 0 auto}.status-icon.complete{color:var(--green);stroke-width:3}.summary-chevron{width:14px;transition:transform .14s ease-out}.chapter-nav[open] .summary-chevron{transform:rotate(180deg)}.topic-list{padding:1px 0 10px 30px;position:relative}.topic-list:before{content:"";position:absolute;left:37px;top:0;bottom:12px;width:1px;background:var(--border)}.topic-link{min-height:40px;display:grid;grid-template-columns:18px minmax(0,1fr);align-items:center;gap:8px;padding:7px 12px 7px 0;color:var(--text);text-decoration:none;font-size:.87rem;position:relative}.topic-link .status-icon{z-index:1;background:var(--bg);border-radius:50%}.topic-link:hover{color:var(--blue)}.topic-link.active{color:var(--blue);font-weight:700}.topic-link.active:before{content:"";position:absolute;left:-30px;top:5px;bottom:5px;width:3px;background:var(--blue)}.review-link{margin-top:3px}.appendix-nav summary{color:var(--muted)}.objective-link{margin:auto 16px 16px;min-height:42px;display:flex;align-items:center;gap:9px;padding:9px 11px;color:var(--text);border:1px solid var(--border-strong);text-decoration:none;font-size:.82rem}.objective-link:hover{border-color:var(--blue);color:var(--blue)}.objective-link svg{width:17px}.drawer-scrim{display:none}main{min-width:0}.lesson-layout{display:grid;grid-template-columns:minmax(0,780px) 230px;justify-content:center;gap:34px;padding:24px 34px 100px}.lesson-article{min-width:0;max-width:780px}.breadcrumbs{display:flex;gap:8px;color:var(--muted);font-size:.82rem;margin:0 0 24px}.lesson-header{margin-bottom:22px}.lesson-deck{max-width:66ch;margin:0;color:var(--muted);font-size:1.25rem;line-height:1.45}.appendix-banner{display:flex;align-items:center;gap:8px;margin:0 0 18px;padding:9px 0;color:var(--amber);border-bottom:1px solid var(--amber);font-size:.82rem;font-weight:700}.appendix-banner svg{width:16px}.connection-strip{min-height:60px;display:grid;grid-template-columns:minmax(0,1fr) 18px minmax(0,1.2fr) 18px minmax(0,1fr);align-items:center;gap:9px;margin:0 0 34px;padding:9px 12px;border:1px solid var(--border-strong);font-size:.8rem}.connection-strip>span{min-width:0;display:grid;gap:3px}.connection-strip small{color:var(--muted);font-size:.68rem;text-transform:uppercase;letter-spacing:.07em}.connection-strip a,.connection-strip b{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text);text-decoration:none}.connection-strip .current b{color:var(--blue)}.connection-strip svg{width:16px;color:var(--muted)}.section-label{display:block;margin:0 0 10px;color:var(--blue);font-size:.72rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase}.lesson-section{margin:0 0 50px}.lesson-section>p{max-width:72ch;font-size:1.04rem}.objective-section{padding:18px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.objective-section h2{max-width:34ch;margin:0;font-size:1.4rem}.lead-copy{font-size:1.28rem!important;line-height:1.48!important}.core-points{margin-top:22px;border-top:1px solid var(--border)}.core-points>div{display:grid;grid-template-columns:42px 1fr;gap:14px;padding:18px 0;border-bottom:1px solid var(--border)}.core-points span{padding-top:2px;color:var(--blue);font-family:ui-monospace,monospace;font-size:.75rem}.core-points p{max-width:66ch;margin:0}.scenario-section{padding:26px 28px;background:var(--surface);border-top:1px solid var(--border-strong);border-bottom:1px solid var(--border-strong)}.scenario-marker{display:flex;align-items:center;gap:8px;margin:0 0 20px;color:var(--amber);font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em}.scenario-marker svg{width:18px}.scenario-section p{font-size:1.05rem}.decision-line{display:grid;grid-template-columns:auto minmax(0,auto) auto 1fr;gap:8px;margin-top:22px;padding-top:18px;border-top:1px solid var(--border);line-height:1.45}.decision-line span{color:var(--blue)}.concept-diagram{margin:28px 0 0;padding:18px;border:1px dashed var(--blue)}.concept-diagram figcaption{display:flex;justify-content:space-between;gap:18px;margin:0 0 18px}.concept-diagram figcaption span{color:var(--muted);font-size:.8rem}.region-boundary{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.zone{min-width:0;display:grid;justify-items:center;gap:9px;padding:14px 8px;border:1px solid var(--border-strong)}.zone>span{color:var(--blue);font-weight:700}.zone>svg{width:30px;height:30px}.zone>div{display:flex;gap:12px;color:var(--blue)}.zone>div svg{width:17px}.zone small{color:var(--muted);text-align:center}.concept-diagram>p{margin:16px 0 0;padding-top:14px;border-top:1px solid var(--border);font-size:.86rem;color:var(--muted)}.hierarchy-diagram{display:grid;justify-items:center}.hierarchy-diagram figcaption{width:100%}.hierarchy-level{display:grid;grid-template-columns:32px 1fr;margin-top:5px;padding:10px 14px;border:1px solid var(--border-strong)}.hierarchy-level span{color:var(--blue);font-family:ui-monospace,monospace}.model-row{display:grid;grid-template-columns:50px 1fr 165px;align-items:center;gap:12px;margin:8px 0}.model-row>div{display:grid;grid-template-columns:repeat(5,1fr);gap:3px}.model-row>div span{height:18px;background:var(--surface-strong)}.model-row>div .customer{background:var(--blue)}.model-row>div .provider{border:1px solid var(--blue)}.model-row small{color:var(--muted)}.compute-line,.redundancy-line{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.compute-line>div{display:grid;justify-items:center;gap:7px;padding:14px 5px;border-right:1px solid var(--border);text-align:center}.compute-line>div:last-child{border:0}.compute-line svg{color:var(--blue)}.compute-line small,.redundancy-line small{color:var(--muted)}.redundancy-line span{display:grid;gap:5px;padding:12px 8px;border-top:3px solid var(--blue)}.security-diagram>div{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:0}.security-diagram>div>span{padding:10px 13px;border:1px solid var(--border);margin-right:-1px}.security-diagram>div>strong{display:flex;align-items:center;gap:7px;padding:10px 14px;color:#fff;background:var(--blue)}.security-diagram svg{width:18px}.network-diagram>div{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px}.network-diagram>div svg{color:var(--blue)}.comparison-table{border-top:2px solid var(--text);font-size:.92rem}.comparison-table>div{display:grid;grid-template-columns:minmax(115px,.75fr) 1.2fr 1.1fr;border-bottom:1px solid var(--border)}.comparison-table span,.comparison-table strong{padding:12px 10px}.comparison-head{color:var(--muted);background:var(--surface);font-size:.73rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em}.recall-section{padding-top:8px}.knowledge-check{margin:24px 0 38px;padding:22px 0;border-top:1px solid var(--border-strong);border-bottom:1px solid var(--border)}.check-heading{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:18px}.check-heading h3{max-width:58ch;margin-bottom:16px}.question-type{color:var(--muted);font-size:.67rem;text-transform:uppercase}fieldset{margin:0;padding:0;border:0}.answer-row{min-height:48px;display:grid;grid-template-columns:20px minmax(0,1fr) 20px;align-items:center;gap:10px;margin:8px 0;padding:10px 12px;border:1px solid var(--border);cursor:pointer;line-height:1.35}.answer-row:hover{border-color:var(--blue);background:var(--blue-soft)}.answer-row input{width:17px;height:17px;accent-color:var(--blue)}.answer-row svg{width:18px}.answer-row.correct{border-color:var(--green);background:var(--green-soft)}.answer-row.correct svg{color:var(--green)}.answer-row.incorrect{border-color:var(--red);background:var(--red-soft)}.answer-row.incorrect svg{color:var(--red)}.answer-feedback,.quiz-explanation,.practice-explanation{margin-top:16px;padding:16px 18px;border:1px solid var(--border-strong)}.answer-feedback.is-correct{border-color:var(--green)}.answer-feedback.is-incorrect{border-color:var(--red)}.answer-feedback p,.quiz-explanation p,.practice-explanation p{margin:6px 0}.option-rationales{margin-top:16px;padding-top:12px;border-top:1px solid var(--border);font-size:.86rem}.option-rationales>span{font-weight:700}.button{min-height:42px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:9px 14px;border:1px solid transparent;border-radius:3px;font-size:.88rem;font-weight:700;text-decoration:none;cursor:pointer}.button svg{width:17px}.button.primary{color:#fff;background:var(--button-blue);border-color:var(--button-blue)}.button.primary:hover{background:#005ea8}.button.secondary{color:var(--text);background:var(--bg);border-color:var(--border-strong)}.button.secondary:hover{color:var(--blue);border-color:var(--blue)}.button:disabled{opacity:.45;cursor:not-allowed}.text-button{display:inline-flex;align-items:center;gap:7px;padding:8px 0;color:var(--blue);background:transparent;border:0;cursor:pointer;font-weight:700}.text-button svg{width:16px}.lesson-footer{position:sticky;bottom:0;z-index:10;display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:center;margin-top:55px;padding:12px 0;background:var(--bg);border-top:1px solid var(--border-strong)}.lesson-footer .button:last-child{justify-self:end}.completion-button.completed{color:var(--green);border-color:var(--green);background:var(--green-soft)}.next-chapter-note{color:var(--muted);text-align:right;font-size:.82rem}.exam-lens{position:sticky;top:calc(var(--topbar) + 24px);align-self:start;max-height:calc(100vh - var(--topbar) - 48px);overflow-y:auto;padding-left:18px;border-left:1px solid var(--border)}.lens-heading{display:flex;align-items:center;gap:8px;margin-bottom:8px;color:var(--blue);font-size:.78rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase}.lens-heading svg{width:16px}.exam-lens section{padding:18px 0;border-bottom:1px solid var(--border)}.exam-lens h2{margin:0 0 10px;color:var(--blue);font-size:.95rem}.exam-lens p{margin:0 0 10px;font-size:.88rem;line-height:1.45}.exam-lens .caution h2{color:var(--amber)}.exam-lens dl,.exam-lens dt{margin:0}.exam-lens dl{display:grid;gap:10px}.exam-lens dt{font-family:ui-monospace,monospace;font-size:.8rem}.source-material details{margin:8px 0;color:var(--muted);font-size:.75rem}.source-material summary{cursor:pointer}.source-material a{display:flex;justify-content:space-between;gap:8px;font-size:.78rem}.source-material a svg{width:14px}.review-page,.final-page{max-width:1120px;margin:0 auto;padding:28px 42px 100px}.review-header{display:grid;grid-template-columns:1fr auto;gap:40px;padding-bottom:28px;border-bottom:1px solid var(--border-strong)}.review-header p{max-width:58ch;color:var(--muted);font-size:1.12rem}.review-status{min-width:130px;display:grid;align-content:start;justify-items:end}.review-status span,.review-status small{color:var(--muted)}.review-status strong{color:var(--blue);font-size:2rem}.review-band{display:grid;grid-template-columns:1fr 1fr;gap:48px;padding:34px 0;border-bottom:1px solid var(--border)}.review-band p{margin:0 0 12px}.confusion-list p{display:grid;grid-template-columns:17px 1fr;gap:9px}.confusion-list svg{width:16px;color:var(--amber)}.key-term-strip{padding:26px 0;border-bottom:1px solid var(--border)}.key-term-strip>div{display:flex;flex-wrap:wrap;gap:7px 18px}.key-term-strip code{color:var(--text);font-size:.8rem}.chapter-quiz{padding-top:48px}.quiz-title{display:grid;grid-template-columns:1fr auto;align-items:end;gap:20px;margin-bottom:24px}.quiz-title h2{margin:0}.score-block{display:flex;align-items:baseline;gap:10px}.score-block strong{color:var(--blue);font-size:2rem}.score-block span{color:var(--muted)}.quiz-question{padding:24px 0 32px;border-top:1px solid var(--border)}.quiz-question legend{display:grid;grid-template-columns:40px 1fr;gap:10px;margin-bottom:14px;font-size:1.05rem;font-weight:700;line-height:1.35}.quiz-question legend span{color:var(--blue);font-family:ui-monospace,monospace}.quiz-actions{position:sticky;bottom:0;display:flex;align-items:center;justify-content:space-between;padding:12px 0;background:var(--bg);border-top:1px solid var(--border-strong)}.review-footer{display:flex;justify-content:flex-end;padding-top:32px}.final-nav{position:sticky;top:var(--topbar);z-index:20;display:flex;gap:26px;padding:15px 0;background:var(--bg);border-bottom:1px solid var(--border-strong)}.final-nav a{color:var(--muted);text-decoration:none}.final-nav a.active{color:var(--blue);font-weight:700}.cram-page>header,.atlas-page>header,.flashcard-page>header{padding:45px 0 28px;border-bottom:1px solid var(--border-strong)}.cram-page header p,.atlas-page header p,.flashcard-page header p{color:var(--muted);font-size:1.12rem}.cram-page>section{padding:30px 0;border-bottom:1px solid var(--border)}.cram-chapter{display:grid;grid-template-columns:40px 1fr auto;gap:12px;align-items:center}.cram-chapter>span,.atlas-heading>span{color:var(--blue);font-family:ui-monospace,monospace}.cram-chapter h2{margin:0}.cram-chapter a,.atlas-heading a{display:inline-flex;align-items:center;gap:6px;font-size:.86rem}.cram-chapter svg,.atlas-heading svg{width:15px}.cram-page section>p{max-width:70ch;margin:18px 0 0 52px}.atlas-page>section{padding:34px 0;border-bottom:1px solid var(--border-strong);scroll-margin-top:120px}.atlas-heading{display:grid;grid-template-columns:40px 1fr auto;gap:12px;align-items:center;margin-bottom:18px}.atlas-heading h2{margin:0}.flashcard-page{max-width:800px;margin:0 auto}.flashcard-meter{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center;margin:28px 0 14px;color:var(--muted)}.flashcard{width:100%;min-height:360px;display:grid;grid-template-rows:auto 1fr auto;gap:20px;align-items:center;padding:30px 42px;color:var(--text);background:var(--surface);border:1px solid var(--border-strong);border-radius:4px;text-align:left;cursor:pointer}.flashcard>span{color:var(--blue);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em}.flashcard>strong{max-width:28ch;font-size:clamp(1.8rem,4vw,3rem);line-height:1.18;letter-spacing:-.025em}.flashcard>small{color:var(--muted)}.flashcard.flipped{background:var(--blue-soft);border-color:var(--blue)}.flashcard-controls{display:grid;grid-template-columns:repeat(4,auto);justify-content:center;gap:8px;margin-top:16px}.practice-intro{max-width:750px;margin:70px auto 0;padding:30px 0;border-top:3px solid var(--blue)}.practice-intro>p{max-width:60ch;color:var(--muted);font-size:1.1rem}.practice-intro>small{display:block;margin-top:20px;color:var(--muted)}.exam-distribution{display:grid;grid-template-columns:repeat(3,1fr);margin:30px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.exam-distribution span{display:grid;gap:4px;padding:18px 12px;border-right:1px solid var(--border)}.exam-distribution span:last-child{border:0}.exam-distribution b{color:var(--blue);font-size:1.6rem}.practice-workspace,.results-page{padding-top:38px}.practice-header{display:flex;justify-content:space-between;gap:20px;align-items:end;padding-bottom:22px;border-bottom:1px solid var(--border)}.practice-header h1{margin-bottom:0}.practice-header>div:last-child{display:grid;justify-items:end}.practice-header>div:last-child strong{color:var(--blue);font-size:1.35rem}.practice-header>div:last-child span{color:var(--muted)}.exam-progress{height:5px;display:block;margin-bottom:26px}.practice-grid,.results-grid{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:34px}.practice-question{padding-top:8px}.practice-question h2{max-width:34ch;font-size:1.55rem}.question-controls{display:grid;grid-template-columns:1fr auto 1fr;gap:8px;margin-top:24px}.question-controls .button:last-child{justify-self:end}.button.flagged{color:var(--amber);border-color:var(--amber)}.question-map,.review-map{padding-left:20px;border-left:1px solid var(--border)}.question-map h2{font-size:1rem}.question-map>div,.result-map{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}.question-map>div>button,.result-map button{aspect-ratio:1;border:1px solid var(--border);background:var(--bg);cursor:pointer;font-size:.78rem}.question-map button.current,.result-map button.current{border:2px solid var(--blue);color:var(--blue)}.question-map button.answered{background:var(--green-soft);border-color:var(--green)}.question-map button.flagged{box-shadow:inset 0 -3px var(--amber)}.question-map .map-legend{display:flex;grid-template-columns:none;gap:12px;margin-top:18px;color:var(--muted);font-size:.72rem}.map-legend span{display:flex;align-items:center;gap:5px}.map-legend i{width:10px;height:10px;border:1px solid var(--border)}.map-legend i.answered{background:var(--green-soft);border-color:var(--green)}.map-legend i.flagged{border-bottom:3px solid var(--amber)}.submit-exam{width:100%;margin-top:22px}.question-map>p{color:var(--muted);font-size:.78rem}.results-header{display:grid;grid-template-columns:1fr auto;align-items:center;gap:30px;padding-bottom:26px;border-bottom:1px solid var(--border-strong)}.results-header p{color:var(--muted)}.result-status{display:flex;align-items:center;gap:9px;color:var(--amber)}.result-status svg{width:20px}.objective-breakdown,.weak-areas{padding:26px 0;border-bottom:1px solid var(--border)}.objective-breakdown>div{display:grid;grid-template-columns:220px 58px 1fr 44px;gap:12px;align-items:center;min-height:36px}.objective-breakdown b,.objective-breakdown strong{font-size:.84rem}.weak-areas>div{display:grid;grid-template-columns:1fr 80px 120px;gap:16px;padding:8px 0;border-top:1px solid var(--border)}.weak-areas a{display:flex;align-items:center;gap:5px}.weak-areas svg{width:14px}.results-grid{padding-top:32px}.missed-heading{display:flex;justify-content:space-between}.practice-explanation{margin-top:18px;border-color:var(--border-strong)}.filter-tabs{display:flex;gap:16px;margin:14px 0 18px;border-bottom:1px solid var(--border)}.filter-tabs button{padding:7px 0;background:transparent;border:0;border-bottom:2px solid transparent;cursor:pointer}.filter-tabs button.active{color:var(--blue);border-color:var(--blue)}.result-map{margin-bottom:20px}.result-map button.correct{background:var(--green-soft);border-color:var(--green)}.result-map button.incorrect{background:var(--amber-soft);border-color:var(--amber)}.review-map>.button{width:100%;margin-top:8px}@media(max-width:1199px){.lesson-layout{grid-template-columns:minmax(0,780px)}.exam-lens{position:static;max-height:none;display:grid;grid-template-columns:repeat(2,1fr);gap:0 28px;padding:20px 0 0;border-left:0;border-top:1px solid var(--border-strong)}.lens-heading{grid-column:1 / -1}}@media(max-width:899px){:root{--topbar: 58px}.topbar{grid-template-columns:auto auto minmax(120px,1fr) auto;gap:9px;padding:0 12px}.menu-button{display:inline-grid}.overall-progress{position:absolute;left:0;right:0;bottom:-4px;width:auto}.overall-progress span,.search-box kbd{display:none}.search-box input{padding-right:10px}.shell-body{grid-template-columns:1fr}.course-sidebar{position:fixed;z-index:90;top:0;left:0;width:min(82vw,390px);height:100vh;transform:translate(-102%);box-shadow:var(--shadow);transition:transform .18s cubic-bezier(.16,1,.3,1)}.course-sidebar.is-open{transform:translate(0)}.sidebar-close{display:inline-grid}.drawer-scrim{position:fixed;z-index:80;top:0;right:0;bottom:0;left:0;width:100%;height:100%;padding:0;border:0;background:#02080e9e;opacity:0;pointer-events:none;display:block;transition:opacity .16s ease-out}.drawer-scrim.is-open{opacity:1;pointer-events:auto}.lesson-layout{padding-left:24px;padding-right:24px}.review-page,.final-page{padding-left:28px;padding-right:28px}.practice-grid,.results-grid{grid-template-columns:1fr}.question-map,.review-map{padding:24px 0 0;border-left:0;border-top:1px solid var(--border)}.question-map>div,.result-map{grid-template-columns:repeat(10,1fr)}}@media(max-width:640px){h1{font-size:2.35rem}.topbar{grid-template-columns:auto 1fr auto auto}.brand{font-size:1.08rem}.brand span{display:none}.search-box{width:42px;justify-self:end}.search-box input{width:42px;padding:0;color:transparent;background:transparent;border:0;cursor:pointer}.search-box input::placeholder{color:transparent}.search-box:focus-within{position:absolute;left:56px;right:56px;width:auto;z-index:50;background:var(--bg)}.search-box:focus-within input{width:100%;padding:0 10px 0 42px;color:var(--text);background:var(--bg);border:1px solid var(--border-strong);cursor:text}.search-box:focus-within input::placeholder{color:var(--muted)}.search-results{position:fixed;top:var(--topbar);left:8px;right:8px}.lesson-layout{padding:20px 16px 90px}.lesson-deck{font-size:1.1rem}.connection-strip{grid-template-columns:repeat(3,1fr);gap:0;padding:8px 0;border-left:0;border-right:0}.connection-strip>svg{display:none}.connection-strip>span{padding:0 8px;border-right:1px solid var(--border)}.connection-strip>span:last-child{border-right:0}.connection-strip a,.connection-strip b{white-space:normal;font-size:.74rem}.lesson-section{margin-bottom:42px}.lead-copy{font-size:1.12rem!important}.scenario-section{margin-left:-16px;margin-right:-16px;padding:24px 16px}.decision-line{grid-template-columns:1fr}.decision-line span{transform:rotate(90deg);width:10px}.region-boundary{grid-template-columns:1fr}.zone{grid-template-columns:80px 32px 1fr;justify-items:start}.zone small{grid-column:1 / -1}.concept-diagram figcaption{display:grid}.model-row{grid-template-columns:45px 1fr}.model-row small{grid-column:2}.compute-line,.redundancy-line{grid-template-columns:repeat(2,1fr)}.comparison-table{overflow-x:auto}.comparison-table>div{min-width:620px}.lesson-footer{grid-template-columns:1fr 1fr;margin-left:-16px;margin-right:-16px;padding:10px 16px}.lesson-footer>.button:first-child{display:none}.lesson-footer .button{min-height:48px}.completion-button{grid-column:1}.lesson-footer .button:last-child{grid-column:2;width:100%}.exam-lens{grid-template-columns:1fr}.review-page,.final-page{padding:20px 16px 90px}.review-header,.results-header{grid-template-columns:1fr}.review-status{justify-items:start}.review-band{grid-template-columns:1fr;gap:26px}.quiz-title{grid-template-columns:1fr}.final-nav{gap:15px;overflow-x:auto;white-space:nowrap}.cram-page section>p{margin-left:0}.cram-chapter,.atlas-heading{grid-template-columns:34px 1fr}.cram-chapter a,.atlas-heading a{grid-column:2}.flashcard{min-height:330px;padding:24px}.flashcard-controls{grid-template-columns:1fr 1fr}.exam-distribution{grid-template-columns:1fr}.exam-distribution span{border-right:0;border-bottom:1px solid var(--border)}.exam-distribution span:last-child{border-bottom:0}.practice-header{align-items:start}.practice-question h2{font-size:1.3rem}.question-controls{grid-template-columns:1fr 1fr}.question-controls .button:nth-child(2){grid-row:2;grid-column:1 / -1}.question-map>div,.result-map{grid-template-columns:repeat(6,1fr)}.objective-breakdown>div{grid-template-columns:1fr 50px;padding:8px 0;border-top:1px solid var(--border)}.objective-breakdown progress{grid-column:1}.weak-areas>div{grid-template-columns:1fr auto}.weak-areas a{grid-column:1 / -1}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}