.workshop-catalog{padding-top:0}.workshop-catalog .module-card{min-height:260px}.practice-save-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;padding:20px;margin-bottom:24px;border:1px solid var(--line);border-left:3px solid var(--green);background:var(--surface)}.practice-save-bar p{margin:0;max-width:660px;font-size:12px;line-height:1.7;color:var(--muted)}.practice-save-bar .practice-save-title{font-size:13px;font-weight:800;color:var(--ink);margin-bottom:5px}.practice-save-actions{display:flex;flex-wrap:wrap;gap:8px;flex-shrink:1;min-width:0;max-width:100%}.practice-save-warning{border-left-color:var(--orange)}.practice-version-note{padding:12px;background:var(--paper);border-left:3px solid var(--orange);font-size:12px;line-height:1.7;overflow-wrap:anywhere}.practice-answer-limit{margin:-8px 0 16px;color:var(--muted);font:10px var(--mono)}@media(max-width:767px){.practice-save-bar{align-items:stretch;flex-direction:column;gap:16px}.practice-save-actions{flex-direction:column}}.answer-backup-tools{padding:16px 20px;margin:-12px 0 24px;border:1px solid var(--line);background:var(--surface);font-size:12px}.answer-backup-tools summary{cursor:pointer;font-weight:700;padding:5px 0}.answer-backup-actions,.answer-preview-actions{display:flex;align-items:end;flex-wrap:wrap;gap:12px;margin-top:16px}.answer-file-label{display:grid;gap:8px;min-width:0;font-weight:700}.answer-file-label input{max-width:100%;width:270px;color:var(--ink);font-size:12px}.answer-backup-hint{color:var(--muted);line-height:1.7;margin-bottom:0}.answer-import-preview,.answer-reset-confirmation{padding:20px;margin-bottom:24px;border:1px solid var(--line);border-left:3px solid var(--orange);background:var(--surface);min-width:0;font-size:12px;line-height:1.7}.answer-import-preview h3,.answer-reset-confirmation h3{margin-top:0;font-size:18px}.answer-import-conflict{margin:20px 0;padding:16px;border:1px solid var(--line);min-width:0}.answer-import-conflict legend{overflow-wrap:anywhere;max-width:100%;font:11px var(--mono)}.answer-conflict-comparison{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.answer-conflict-comparison pre{white-space:pre-wrap;overflow-wrap:anywhere;max-height:180px;overflow-y:auto;background:var(--paper);padding:12px;font:12px/1.7 var(--sans)}.answer-import-conflict label{display:inline-flex;align-items:center;gap:8px;padding:12px 16px 12px 0}.answer-operation-message{padding:16px;margin-bottom:20px;border-left:3px solid var(--green);background:var(--surface);font-size:13px;overflow-wrap:anywhere}.answer-operation-error,.answer-reset-confirmation .answer-delete{border-color:var(--red)}@media(max-width:767px){.answer-conflict-comparison{grid-template-columns:minmax(0,1fr)}.answer-backup-actions,.answer-preview-actions{align-items:stretch;flex-direction:column}}.practice-resume-target:focus{outline:3px solid var(--orange);outline-offset:3px}.continue-learning{padding-block:40px 12px}.continue-card{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px;border:1px solid var(--line);border-left:3px solid var(--green);background:var(--surface);overflow-wrap:anywhere}.continue-card>div{min-width:0}.continue-card h3{margin:8px 0;font-size:23px}.continue-card p{max-width:68ch}.continue-card .button{flex-shrink:0}.continue-evidence{font-size:12px;color:var(--muted)}.continue-select{display:grid;gap:8px;max-width:480px;margin-bottom:16px;font-size:13px;font-weight:700}.continue-select select{min-width:0;width:100%;padding:12px;color:var(--ink);background:var(--surface);border:1px solid var(--line)}.continue-backups{margin-top:16px}.continue-backups summary{cursor:pointer;padding-block:12px;font-size:13px;font-weight:700}@media(max-width:767px){.continue-card{flex-direction:column;align-items:stretch;padding:18px;gap:16px}}.continue-learning h2:focus,.catalog#modules:focus{outline:3px solid var(--orange);outline-offset:3px}.learning-network{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:4px 20px;padding:6px max(16px,calc((100% - 1200px)/2));background:var(--surface);color:var(--ink);border-bottom:1px solid var(--line);font:13px/1.4 system-ui,sans-serif}.learning-network a{display:inline-flex;min-height:44px;align-items:center;justify-content:center;padding:8px 12px;border-radius:6px;color:inherit;text-decoration:none}.learning-network a:hover{text-decoration:underline;text-underline-offset:4px}.learning-network a:focus-visible{outline:3px solid var(--green);outline-offset:2px}.learning-network-home{font-weight:700;gap:8px}.learning-network-subjects{display:flex;flex-wrap:wrap;gap:2px}.learning-network a[aria-current]{box-shadow:inset 0 -2px var(--green);font-weight:750}@media(max-width:480px){.learning-network{gap:0}.learning-network-subjects{width:100%;justify-content:space-between}.learning-network-subjects a{padding-inline:8px;font-size:12px}}:root{color-scheme:light;--ink: #18211b;--muted: #657069;--paper: #f5f5ee;--surface: #fffefa;--surface-2: #eceee6;--line: #d7dbd1;--green: #1f6847;--green-bright: #b9f064;--orange: #ee6c3b;--red: #b64132;--shadow: 0 18px 55px rgba(31, 44, 35, .09);--mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;--sans: Inter, "Segoe UI", system-ui, sans-serif}:root[data-theme=dark]{color-scheme:dark;--ink: #edf4eb;--muted: #9aa79d;--paper: #101612;--surface: #172019;--surface-2: #202b23;--line: #344138;--green: #a8e05e;--green-bright: #b9f064;--orange: #ff895d;--red: #ff9285;--shadow: 0 18px 55px rgba(0, 0, 0, .28)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.55}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,[role=tabpanel]:focus-visible{outline:3px solid var(--orange);outline-offset:3px}.page-width{width:min(1180px,calc(100% - 40px));margin-inline:auto}.skip-link{position:fixed;z-index:100;left:16px;top:-60px;padding:10px 16px;background:var(--ink);color:var(--paper);border-radius:4px;transition:top .2s}.skip-link:focus{top:16px}.site-header{height:74px;display:flex;align-items:center;padding:0 max(20px,calc((100vw - 1180px)/2));border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--paper) 92%,transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);position:relative;z-index:5}.brand{display:flex;gap:11px;align-items:center;text-decoration:none;line-height:1}.brand>span:last-child{display:grid;gap:3px}.brand strong{font-size:18px;letter-spacing:-.04em}.brand small{font:9px var(--mono);text-transform:uppercase;letter-spacing:.16em;color:var(--muted)}.brand-mark{width:34px;height:34px;border:1.5px solid var(--ink);display:flex;align-items:flex-end;gap:3px;padding:7px;border-radius:3px;transform:rotate(-2deg)}.brand-mark i{display:block;width:5px;background:var(--ink)}.brand-mark i:nth-child(1){height:8px}.brand-mark i:nth-child(2){height:17px;background:var(--orange)}.brand-mark i:nth-child(3){height:12px}.header-note{margin-left:auto;margin-right:22px;font:10px var(--mono);text-transform:uppercase;letter-spacing:.12em;color:var(--muted)}.icon-button{width:38px;height:38px;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:50%;cursor:pointer;font-size:19px}.eyebrow,.overline{margin:0 0 13px;color:var(--green);font:500 11px var(--mono);text-transform:uppercase;letter-spacing:.13em}.button{display:inline-flex;border:1px solid transparent;min-height:46px;align-items:center;justify-content:center;gap:28px;padding:0 20px;border-radius:3px;text-decoration:none;font-weight:700;cursor:pointer}.button.primary{background:var(--ink);color:var(--paper)}.button.secondary{border-color:var(--line);background:var(--surface);color:var(--ink)}.button:disabled{opacity:.55;cursor:wait}.hero{min-height:570px;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:70px;padding-block:70px}.hero h1{max-width:670px;margin:0;font-size:clamp(52px,7vw,88px);line-height:.96;letter-spacing:-.07em}.hero h1 em{font-weight:500;color:var(--green)}.hero-lead{max-width:620px;font-size:18px;color:var(--muted);margin:28px 0}.hero-actions{display:flex;align-items:center;gap:18px}.quiet-note{font-size:12px;color:var(--muted)}.hero-system{position:relative;min-height:390px;border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow);padding:28px;display:grid;place-content:center;justify-items:center;overflow:hidden}.hero-system:before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:32px 32px;opacity:.25}.system-node{position:relative;z-index:1;min-width:160px;border:1px solid var(--line);background:var(--surface);padding:14px 17px;display:grid}.system-node span{position:absolute;right:9px;top:8px;font:9px var(--mono);color:var(--muted)}.system-node strong{font-size:13px}.system-node small{color:var(--muted);font:10px var(--mono)}.balance-node{border-color:var(--green)}.balance-node:after{content:"";position:absolute;inset:-5px;border:1px solid color-mix(in srgb,var(--green) 30%,transparent)}.flow-line{height:48px;width:1px;background:var(--line);display:flex;flex-direction:column;justify-content:space-around}.flow-line i{width:5px;height:5px;background:var(--orange);border-radius:50%;transform:translate(-2px)}.split-lines{height:36px;width:180px;border-top:1px solid var(--line);position:relative;margin-top:24px}.split-lines i{position:absolute;height:36px;width:1px;background:var(--line);top:0}.split-lines i:first-child{left:0}.split-lines i:last-child{right:0}.node-stack{position:relative;z-index:1;display:flex;gap:20px}.node-stack .system-node{min-width:160px}.principles-strip{background:var(--ink);color:var(--paper)}.principles-strip>div{min-height:78px;display:flex;align-items:center;justify-content:space-around}.principles-strip span{text-transform:uppercase;font-size:11px;font-weight:700;letter-spacing:.12em}.principles-strip b{font:10px var(--mono);color:var(--green-bright);margin-right:12px}.catalog{padding-block:90px 120px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:36px}.section-heading h2{font-size:38px;letter-spacing:-.045em;margin:0}.section-heading>p{max-width:450px;color:var(--muted);margin:0}.module-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.module-card{position:relative;min-height:410px;padding:27px;border:1px solid var(--line);background:var(--surface);text-decoration:none;transition:transform .2s,box-shadow .2s,border-color .2s}.module-card[href]:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--green)}.module-meta{display:flex;justify-content:space-between}.module-number{font:10px var(--mono);color:var(--muted)}.status-dot{color:var(--green);font:10px var(--mono);text-transform:uppercase}.status-dot:before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--green);margin-right:7px}.module-glyph{width:180px;height:75px;margin:36px 0 25px;position:relative;display:flex;align-items:center;justify-content:space-between}.module-glyph span{width:42px;height:34px;border:1px solid var(--ink);background:var(--surface);position:relative;z-index:1}.module-glyph span:nth-child(2){border:2px solid var(--green)}.module-glyph i{position:absolute;left:20px;right:20px;height:1px;background:var(--ink)}.capacity-glyph{align-items:end;justify-content:start;gap:14px;border-bottom:1px solid var(--ink)}.capacity-glyph span{width:32px;border-color:var(--green);background:color-mix(in srgb,var(--green) 12%,var(--surface))}.capacity-glyph span:first-child{height:25px}.capacity-glyph span:nth-child(2){height:50px;border-width:1px}.capacity-glyph span:nth-child(3){height:68px}.capacity-glyph i{left:0;right:auto;bottom:46px;width:150px;background:var(--orange);transform:rotate(-18deg);transform-origin:left}.module-card h3{margin:0;font-size:25px;letter-spacing:-.035em}.module-card>p:not(.overline){max-width:520px;color:var(--muted)}.capability-list{display:flex;flex-wrap:wrap;list-style:none;padding:0;margin:22px 0;gap:7px}.capability-list li{border:1px solid var(--line);border-radius:20px;padding:4px 10px;font:9px var(--mono);text-transform:uppercase}.card-link{position:absolute;right:25px;bottom:22px;font-size:12px;font-weight:700}.card-link b{color:var(--orange);margin-left:8px}.coming-soon{display:grid;place-content:center;text-align:center;background:transparent;border-style:dashed}.plus-glyph{font-size:48px;font-weight:200;color:var(--muted)}.coming-soon p{margin-inline:auto}.coming-soon .module-meta{position:absolute;left:27px;top:27px}.module-header{padding-block:40px 32px}.back-link{display:inline-block;margin-bottom:34px;font-size:12px;color:var(--muted);text-decoration:none}.back-link:hover{color:var(--ink)}.module-title-row{display:flex;justify-content:space-between;align-items:start;gap:30px}.module-title-row h1{font-size:clamp(40px,6vw,66px);line-height:1;letter-spacing:-.06em;margin:0 0 15px}.module-title-row p:last-child{color:var(--muted);max-width:670px;margin:0}.version-pill{border:1px solid var(--line);padding:9px 12px;font:9px var(--mono);color:var(--muted);white-space:nowrap}.version-pill strong{color:var(--ink)}.learning-outcomes{display:grid;grid-template-columns:180px 1fr;align-items:start;border-top:1px solid var(--line);margin-top:32px;padding-top:22px;font-size:12px}.learning-outcomes>strong{text-transform:uppercase;font:10px var(--mono);color:var(--green)}.learning-outcomes ul{display:grid;grid-template-columns:repeat(3,1fr);list-style:none;padding:0;margin:0;gap:20px;counter-reset:outcome}.learning-outcomes li{color:var(--muted);position:relative;padding-left:19px}.learning-outcomes li:before{content:"✓";position:absolute;left:0;color:var(--green)}.tab-rail{border-block:1px solid var(--line);background:var(--surface);position:sticky;top:0;z-index:4}.module-tabs{display:flex;overflow-x:auto}.module-tabs button{flex:1;white-space:nowrap;padding:16px 20px;border:0;border-right:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;font-weight:700;font-size:12px}.module-tabs button:first-child{border-left:1px solid var(--line)}.module-tabs button span{margin-right:9px;font:9px var(--mono)}.module-tabs button[aria-selected=true]{background:var(--ink);color:var(--paper)}.module-tabs button[aria-selected=true] span{color:var(--green-bright)}.module-content{padding-block:42px 100px}.module-content[hidden]{display:none}.standalone-state{padding-block:100px}.state-card{min-height:130px;border:1px solid var(--line);background:var(--surface);display:flex;align-items:center;justify-content:center;gap:12px;padding:25px}.state-card p{margin:5px 0 0;color:var(--muted)}.error-state{justify-content:space-between}.spinner{width:18px;height:18px;border:2px solid var(--line);border-top-color:var(--green);border-radius:50%;animation:spin 1s linear infinite}.playground-layout{display:grid;grid-template-columns:335px 1fr;gap:26px;align-items:start}.control-panel,.experiment-stage{border:1px solid var(--line);background:var(--surface)}.control-panel{padding:23px;position:sticky;top:70px}.panel-heading,.stage-header{display:flex;justify-content:space-between;align-items:start;border-bottom:1px solid var(--line);padding-bottom:17px;margin-bottom:20px}.panel-heading h2,.stage-header h2{margin:0;font-size:21px}.panel-heading .eyebrow,.stage-header .eyebrow{margin-bottom:6px}.live-badge{font:8px var(--mono);color:var(--green);text-transform:uppercase;padding-top:5px}.preset-row{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}.preset-row button{border:1px solid var(--line);background:var(--paper);color:var(--ink);font-size:10px;padding:6px 9px;cursor:pointer;border-radius:2px}.preset-row button:hover{border-color:var(--green)}.control-panel label{display:grid;gap:7px;font-size:11px;font-weight:800;margin-bottom:17px}.control-panel label small{font-weight:400;color:var(--muted)}.control-panel input,.control-panel select{width:100%;border:1px solid var(--line);border-radius:2px;background:var(--paper);color:var(--ink);padding:9px 10px;font:12px var(--mono)}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.inline-error{border-left:3px solid var(--red);background:color-mix(in srgb,var(--red) 10%,transparent);color:var(--red);padding:9px 11px;font-size:11px;margin:3px 0 12px}.stale-result{margin:0 0 18px;border-left:3px solid var(--orange);background:color-mix(in srgb,var(--orange) 10%,transparent);padding:10px 12px;color:var(--muted);font-size:11px}.stale-result strong{color:var(--ink)}.limited-result{display:grid;gap:4px;margin:0 0 18px;border-left:3px solid var(--orange);background:color-mix(in srgb,var(--orange) 10%,transparent);padding:10px 12px;color:var(--muted);font-size:11px}.limited-result strong{color:var(--ink)}.run-button{width:100%;justify-content:space-between}.model-note{text-align:center;color:var(--muted);font:8px var(--mono);text-transform:uppercase;margin:12px 0 0}.experiment-stage{min-height:650px;padding:25px}.time-display{font:12px var(--mono);border:1px solid var(--line);padding:6px 10px}.empty-experiment{min-height:500px;display:grid;align-content:center;justify-items:center;text-align:center}.empty-experiment>p{max-width:510px;color:var(--muted)}.empty-animation{display:flex;align-items:center;gap:15px;margin-bottom:26px}.empty-animation i{width:45px;height:37px;border:1px solid var(--ink)}.empty-animation i:nth-of-type(2){border:2px solid var(--green);transform:rotate(45deg);width:34px;height:34px}.empty-animation span{color:var(--orange)}.empty-experiment h3{font-size:24px;margin:0}.trace-map{min-height:210px;padding:35px 20px;display:flex;align-items:center;justify-content:center;background-image:radial-gradient(var(--line) 1px,transparent 1px);background-size:17px 17px}.trace-node{min-width:105px;padding:13px;background:var(--surface);border:1px solid var(--line);display:grid;box-shadow:0 3px 0 var(--line);transition:.2s}.trace-node small{font:7px var(--mono);color:var(--muted)}.trace-node strong{font-size:11px}.trace-node.active{border-color:var(--green);box-shadow:0 0 0 4px color-mix(in srgb,var(--green) 18%,transparent),0 3px 0 var(--green);transform:translateY(-2px)}.trace-node.danger{border-color:var(--red);box-shadow:0 0 0 4px color-mix(in srgb,var(--red) 18%,transparent)}.trace-node.balancer{border-radius:50%;min-width:105px;min-height:105px;place-content:center;text-align:center}.map-arrow{padding:0 14px;color:var(--orange)}.trace-nodes{display:grid;gap:8px;max-height:185px;overflow:auto}.playback{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:13px 0;border-block:1px solid var(--line)}.playback input{flex:1;min-width:120px;accent-color:var(--green)}.playback>span{color:var(--muted);font:9px var(--mono);min-width:45px;text-align:right}.playback-speed{display:flex;align-items:center;gap:6px;color:var(--muted);font:9px var(--mono);text-transform:uppercase;margin-left:auto}.playback-speed select{border:1px solid var(--line);border-radius:2px;background:var(--paper);color:var(--ink);padding:7px 6px;font:10px var(--mono)}.play-button,.step-button{border:1px solid var(--line);background:var(--paper);color:var(--ink);width:32px;height:32px;cursor:pointer}.play-button{background:var(--ink);color:var(--paper)}.play-button:disabled,.step-button:disabled{opacity:.35;cursor:not-allowed}.current-event{min-height:85px;display:flex;align-items:start;gap:15px;padding:17px 0}.current-event>span{background:color-mix(in srgb,var(--green) 13%,transparent);color:var(--green);padding:4px 7px;font:8px var(--mono);text-transform:uppercase}.current-event p{margin:3px 0 0;font-size:12px;color:var(--muted)}.trace-log{margin:18px 0}.trace-log tbody tr.selected{background:color-mix(in srgb,var(--green) 10%,transparent)}.trace-event-link{border:0;background:transparent;color:var(--green);padding:4px 7px;font:10px var(--mono);text-decoration:underline;text-underline-offset:3px;cursor:pointer}.trace-event-link[aria-current=step]{border-radius:2px;background:var(--green);color:var(--paper);text-decoration:none}.metric-grid{display:grid;grid-template-columns:repeat(6,1fr);border:1px solid var(--line)}.metric-grid article{padding:14px;border-right:1px solid var(--line);display:grid}.metric-grid article:last-child{border:0}.metric-grid small{font:7px var(--mono);color:var(--muted)}.metric-grid strong{font-size:23px;letter-spacing:-.05em}.metric-grid span{font-size:9px;color:var(--muted)}.failure-schedule-control{display:grid;gap:8px;margin:0 0 14px;border:1px solid var(--line);padding:10px 12px;background:var(--surface-2)}.failure-schedule-header{display:flex;justify-content:space-between;align-items:center}.failure-schedule-header .eyebrow{margin:0;font:8px var(--mono);color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.failure-entry{display:flex;flex-direction:column;gap:2px;font-size:11px}.failure-entry strong{color:var(--red)}.failure-entry span{color:var(--ink)}.failure-entry small{color:var(--muted);font:9px var(--mono)}.button-link{background:none;border:none;color:var(--muted);cursor:pointer;font:9px var(--mono);padding:0;text-decoration:underline}.button-link:hover{color:var(--ink)}.trace-node.danger small{color:var(--red)}.trace-details,.assumptions{margin-top:18px;border-top:1px solid var(--line);padding-top:12px}.trace-details summary,.assumptions summary{cursor:pointer;font-size:11px;font-weight:800}.assumptions{max-width:620px;text-align:left}.assumptions ul{font-size:11px;color:var(--muted);padding-left:18px}.table-scroll{overflow-x:auto;margin-top:12px}table{width:100%;border-collapse:collapse;font-size:10px}th,td{border-bottom:1px solid var(--line);padding:9px;text-align:left}th{font:8px var(--mono);color:var(--muted)}.outcome{font:7px var(--mono);color:var(--green)}.outcome.rejected,.outcome.failed{color:var(--red)}.outcome.bypassed{color:var(--orange)}.rate-limiter-layout .control-panel{align-self:start}.availability-control{display:grid;gap:10px;margin:0 0 14px;border:1px solid var(--line);padding:12px}.availability-control legend{padding-inline:5px;color:var(--muted);font:9px var(--mono);text-transform:uppercase}.check-control{display:flex!important;grid-template-columns:none!important;flex-direction:row!important;align-items:center;gap:8px}.check-control input{width:auto!important}.rate-empty-flow,.rate-topology{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap}.rate-empty-flow span,.rate-topology>div{border:1px solid var(--line);background:var(--paper);padding:13px 16px}.rate-empty-flow i,.rate-topology>span{color:var(--orange);font-style:normal}.rate-topology{justify-content:flex-start;padding:22px;border:1px solid var(--line);background:var(--surface)}.rate-topology>div{display:grid;gap:7px;border-top:3px solid var(--green)}.rate-topology>div.warning{border-top-color:var(--orange)}.rate-topology small{color:var(--muted);font:8px var(--mono)}.decision-callout{margin:18px 0;border-left:3px solid var(--green);background:color-mix(in srgb,var(--green) 8%,transparent);padding:13px 15px}.decision-callout.warning{border-left-color:var(--orange);background:color-mix(in srgb,var(--orange) 9%,transparent)}.decision-callout p{margin:5px 0 0;color:var(--muted);font-size:11px}.concept-header{max-width:720px;margin-bottom:32px}.concept-header h2{margin:0 0 10px;font-size:36px;letter-spacing:-.04em}.concept-header>p:last-child{color:var(--muted)}.rate-architecture{display:flex;align-items:stretch;gap:12px;overflow-x:auto;padding:20px;border:1px solid var(--line);background:var(--surface)}.rate-architecture article{min-width:190px;flex:1;border-top:3px solid var(--green);background:var(--paper);padding:18px}.rate-architecture article>*{display:block}.rate-architecture small{color:var(--muted);font:8px var(--mono)}.rate-architecture strong{margin-top:20px}.rate-architecture p,.comparison-grid li,.text-equivalent li{color:var(--muted);font-size:11px}.rate-architecture>span{align-self:center;color:var(--orange)}.comparison-grid,.sequence-columns{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:22px}.comparison-grid article,.sequence-columns article{border:1px solid var(--line);background:var(--surface);padding:20px}.sequence-columns{grid-template-columns:repeat(3,1fr)}.sequence-columns.two-up{grid-template-columns:repeat(2,1fr)}.sequence-columns ol{padding-left:18px;color:var(--muted);font-size:11px}.sequence-number{color:var(--green);font:12px var(--mono)}@media(max-width:640px){.comparison-grid,.sequence-columns,.sequence-columns.two-up{grid-template-columns:1fr}.rate-architecture{padding:14px}.rate-topology{align-items:stretch}.rate-topology>div{flex:1 1 120px}}.concept-view,.practice-view{max-width:900px;margin-inline:auto}.concept-intro{max-width:680px;margin-bottom:40px}.concept-intro h2{margin:0;font-size:38px;line-height:1.12;letter-spacing:-.045em}.concept-intro>p:last-child{color:var(--muted);font-size:15px}.reading-layout{min-width:0;display:grid;grid-template-columns:280px minmax(0,700px);gap:70px;justify-content:center;align-items:start}.reading-layout>*{min-width:0}.reading-aside{position:sticky;top:88px;border-top:3px solid var(--green);padding-top:18px}.reading-aside h2{font-size:24px;line-height:1.2}.reading-aside>p:last-child{font-size:13px;color:var(--muted)}.prose{font-size:16px}.prose h1{font-size:42px;line-height:1.08;letter-spacing:-.05em}.prose h2{margin-top:52px;font-size:27px;letter-spacing:-.035em;border-top:1px solid var(--line);padding-top:28px}.prose h3{margin-top:30px}.prose p,.prose li{color:var(--muted)}.prose strong{color:var(--ink)}.prose code{font:13px var(--mono);color:var(--green)}.prose blockquote{margin:25px 0;padding:15px 20px;border-left:3px solid var(--orange);background:var(--surface)}.prose blockquote p{margin:0;color:var(--ink)}.prose table{font-size:13px}.study-prose{min-width:0;overflow-wrap:anywhere}.study-scroll{min-width:0;max-width:100%;width:100%;overflow-x:auto;margin-block:24px;border:1px solid var(--line);border-radius:8px;background:var(--surface)}.study-scroll:focus-visible{outline:3px solid var(--orange);outline-offset:3px}.study-scroll pre{width:max-content;min-width:100%;margin:0;padding:16px;white-space:pre;overflow-wrap:normal}.study-scroll pre code{font-size:13px;line-height:1.6}.study-scroll table{min-width:32rem}.study-scroll th{color:var(--ink);font:600 13px var(--sans)}.study-scroll td{color:var(--muted);max-width:36rem}.architecture-diagram{display:flex;align-items:center;justify-content:center;gap:15px;min-height:260px;border:1px solid var(--line);background:var(--surface);padding:25px}.architecture-diagram>span{font:9px var(--mono);color:var(--orange)}.arch-client,.arch-lb,.arch-services>div{display:grid;border:1px solid var(--line);padding:15px;min-width:120px}.architecture-diagram small{font:7px var(--mono);color:var(--muted)}.architecture-diagram i{font:9px var(--mono);color:var(--muted);font-style:normal;margin-top:5px}.arch-lb{border:2px solid var(--green)}.arch-services{display:grid;gap:9px}.concept-cards{list-style:none;padding:0;margin:24px 0;display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.concept-cards li{display:flex;gap:16px;padding:20px;background:var(--surface);border:1px solid var(--line)}.concept-cards li>span{font:10px var(--mono);color:var(--green)}.concept-cards h3{margin:0;font-size:15px}.concept-cards p{margin:6px 0 0;color:var(--muted);font-size:12px}.callout{border-left:4px solid var(--orange);background:var(--surface);padding:20px}.callout strong{font:9px var(--mono);color:var(--orange);text-transform:uppercase}.callout p{margin-bottom:0;font-size:17px}.sequence-list{list-style:none;padding:0;margin:0}.sequence-list li{display:grid;grid-template-columns:48px 1fr;gap:18px;min-height:130px}.sequence-marker{display:grid;justify-items:center;grid-template-rows:35px 1fr}.sequence-marker span{width:35px;height:35px;display:grid;place-content:center;border-radius:50%;background:var(--ink);color:var(--paper);font:10px var(--mono)}.sequence-marker i{width:1px;background:var(--line)}.sequence-list li:last-child .sequence-marker i{display:none}.sequence-list small{font:8px var(--mono);color:var(--green)}.sequence-list h3{margin:2px 0;font-size:19px}.sequence-list p{color:var(--muted);margin:4px 0;max-width:670px;font-size:13px}.equation{display:grid;justify-items:center;text-align:center;background:var(--ink);color:var(--paper);padding:34px}.equation span{font:8px var(--mono);color:var(--green-bright)}.equation strong{font-size:26px;margin:7px}.equation strong b{font-weight:inherit;white-space:nowrap}@media(max-width:480px){.equation strong b{white-space:normal}}.equation strong i{color:var(--orange);font-style:normal;padding:0 9px}.equation small{color:color-mix(in srgb,var(--paper) 60%,transparent)}.question-list{display:grid;gap:20px}.question-card{border:1px solid var(--line);background:var(--surface);padding:28px}.question-number{color:var(--green);font:9px var(--mono);letter-spacing:.1em}.question-card h3{font-size:21px;max-width:700px}.question-card fieldset{border:0;padding:0;display:grid;gap:8px}.answer-option{display:flex;align-items:center;gap:12px;border:1px solid var(--line);padding:12px;cursor:pointer;font-size:13px}.answer-option:has(input:checked){border-color:var(--ink)}.answer-option span{width:25px;height:25px;border:1px solid var(--line);display:grid;place-content:center;font:9px var(--mono)}.answer-option.correct{border-color:var(--green)}.answer-option.incorrect{border-color:var(--red)}.answer-feedback{margin-top:15px;padding:17px;border-left:3px solid var(--green);background:var(--paper);font-size:12px}.answer-feedback.incorrect{border-color:var(--red)}.answer-feedback p{margin:5px 0;color:var(--muted)}.answer-feedback button{border:0;padding:0;background:transparent;color:var(--green);text-decoration:underline;cursor:pointer;font-size:11px}.interview-question label{display:grid;gap:8px;font-size:11px;font-weight:800}.interview-question textarea{resize:vertical;border:1px solid var(--line);background:var(--paper);color:var(--ink);padding:13px;margin-bottom:15px}.model-answer{margin-top:20px;padding:20px;border:1px solid var(--line);background:var(--paper)}.model-answer li,.model-answer p{color:var(--muted);font-size:12px}.not-found{min-height:calc(100vh - 74px);display:grid;place-content:center;justify-items:center;text-align:center;padding:30px}.not-found h1{font-size:45px;margin:0}.not-found p:not(.eyebrow){color:var(--muted)}.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}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:900px){.hero{grid-template-columns:1fr}.hero-system{min-height:350px}.playground-layout{grid-template-columns:minmax(0,1fr)}.control-panel{position:static}.learning-outcomes{grid-template-columns:1fr;gap:14px}.reading-layout{grid-template-columns:minmax(0,1fr);gap:30px}.reading-aside{position:static}.metric-grid{grid-template-columns:repeat(3,1fr)}.metric-grid article:nth-child(3){border-right:0}.trace-map,.architecture-diagram{overflow-x:auto;justify-content:start}}@media(max-width:640px){.page-width{width:min(100% - 24px,1180px)}.site-header{padding-inline:13px}.header-note{display:none}.hero{min-height:auto;padding-block:50px;gap:40px}.hero h1{font-size:53px}.hero-actions{align-items:start;flex-direction:column}.hero-system{padding:15px;min-height:310px}.system-node,.node-stack .system-node{min-width:120px}.split-lines{width:150px}.node-stack{gap:10px}.principles-strip>div{justify-content:space-between}.principles-strip span{font-size:8px}.principles-strip b{display:block;margin:0 0 3px}.catalog{padding-block:65px}.section-heading{align-items:start;flex-direction:column}.module-grid{grid-template-columns:1fr}.module-card{min-height:390px}.module-title-row{display:block}.version-pill{display:inline-block;margin-top:20px}.learning-outcomes ul{grid-template-columns:1fr;gap:8px}.module-tabs{width:100%}.module-tabs button{flex:none}.module-content{padding-block:25px 70px}.control-panel,.experiment-stage{padding:16px}.metric-grid{grid-template-columns:repeat(2,1fr)}.metric-grid article:nth-child(2n){border-right:0}.concept-intro h2{font-size:32px}.concept-cards{grid-template-columns:1fr}.architecture-diagram{padding:15px}.question-card{padding:20px}.error-state{align-items:start;flex-direction:column}.not-found h1{font-size:37px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}.capacity-workbench{display:grid;grid-template-columns:370px minmax(0,1fr);align-items:start;gap:26px}.capacity-controls,.capacity-results{border:1px solid var(--line);background:var(--surface)}.capacity-controls{padding:23px}.capacity-fieldset{border:0;padding:0;margin:22px 0 0}.capacity-fieldset legend{width:100%;padding-bottom:7px;border-bottom:1px solid var(--line);color:var(--green);font:9px var(--mono);text-transform:uppercase;letter-spacing:.12em}.capacity-field-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}.capacity-field-grid label{display:grid;gap:6px;font-size:10px;font-weight:800}.capacity-field-grid label>.field-label-row{display:flex;justify-content:space-between;gap:6px}.capacity-field-grid small{color:var(--muted);font:8px var(--mono);font-weight:400}.capacity-field-grid .field-error{color:var(--red);font-family:var(--sans);font-size:9px}.capacity-field-grid input{min-width:0;width:100%;border:1px solid var(--line);border-radius:2px;background:var(--paper);color:var(--ink);padding:9px;font:11px var(--mono)}.prediction-callout{border-left:3px solid var(--orange);padding:10px 12px;background:color-mix(in srgb,var(--orange) 7%,transparent)}.prediction-callout span{color:var(--orange);font:8px var(--mono);text-transform:uppercase}.prediction-callout p{margin:4px 0 0;font-size:11px}.capacity-controls .run-button{margin-top:22px}.capacity-results{min-height:735px;padding:28px}.capacity-empty{min-height:650px;display:grid;place-content:center;justify-items:center;text-align:center}.capacity-empty h2{max-width:570px;margin:0;font-size:clamp(30px,4vw,48px);line-height:1.03;letter-spacing:-.05em}.capacity-empty>p:last-child{max-width:520px;color:var(--muted)}.estimate-funnel{display:flex;align-items:center;gap:12px;margin-bottom:35px}.estimate-funnel span{border:1px solid var(--line);padding:14px 13px;background:var(--paper);font:8px var(--mono)}.estimate-funnel span:last-child{border-color:var(--green)}.estimate-funnel i{color:var(--orange);font-style:normal}.result-heading,.section-label{display:flex;justify-content:space-between;align-items:start;gap:25px}.result-heading h2{margin:0;font-size:30px;letter-spacing:-.04em}.estimate-status{padding:7px 9px;border:1px solid var(--orange);color:var(--orange);font:8px var(--mono);text-transform:uppercase}.capacity-metrics{display:grid;grid-template-columns:repeat(4,1fr);margin-top:24px;border:1px solid var(--line)}.capacity-metrics article{display:grid;padding:16px;border-right:1px solid var(--line)}.capacity-metrics article:last-child{border:0}.capacity-metrics small,.demand-split span{color:var(--muted);font:8px var(--mono);text-transform:uppercase}.capacity-metrics strong{margin-top:4px;font-size:25px;line-height:1;letter-spacing:-.05em}.capacity-metrics span{color:var(--muted);font-size:9px}.demand-split{display:grid;grid-template-columns:1fr auto 1fr 1fr;gap:10px;align-items:center;padding:18px 0;border-bottom:1px solid var(--line)}.demand-split div{display:grid}.demand-split strong{font-size:12px}.demand-split i{color:var(--orange);font:9px var(--mono);font-style:normal}.sensitivity-panel{padding:24px 0;border-bottom:1px solid var(--line)}.section-label h3{margin:0;font-size:20px}.section-label>p{max-width:270px;margin:0;color:var(--muted);font-size:10px}.sensitivity-row{display:grid;grid-template-columns:45px 1fr 95px;gap:12px;align-items:center;margin-top:12px;font-size:10px}.sensitivity-row>span{text-align:right;font:9px var(--mono)}.sensitivity-track{height:7px;background:var(--surface-2)}.sensitivity-track i{display:block;height:100%;background:var(--green)}.calculation-trail{margin-top:22px}.calculation-trail summary{cursor:pointer;font-size:12px;font-weight:800}.calculation-trail summary span{float:right;color:var(--muted);font:9px var(--mono)}.calculation-trail ol{list-style:none;margin:15px 0 0;padding:0;counter-reset:calc}.calculation-trail li{counter-increment:calc;display:grid;grid-template-columns:1fr auto;gap:20px;padding:13px 0 13px 30px;border-top:1px solid var(--line);position:relative}.calculation-trail li:before{content:counter(calc,decimal-leading-zero);position:absolute;left:0;top:16px;color:var(--green);font:8px var(--mono)}.calculation-trail li div{display:grid;gap:3px}.calculation-trail code,.formula-grid code,.capacity-map code{color:var(--green);font:10px var(--mono)}.calculation-trail p{margin:2px 0 0;color:var(--muted);font-size:10px}.calculation-trail b{white-space:nowrap;font-size:13px}.calculation-trail b small{color:var(--muted);font:8px var(--mono)}.estimate-notes{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:24px}.estimate-notes section{padding:17px;background:var(--paper);border:1px solid var(--line)}.estimate-notes ul{margin:0;padding-left:17px;color:var(--muted);font-size:10px}.warning-list{border-left:3px solid var(--orange)!important}.capacity-map{display:flex;align-items:stretch;border:1px solid var(--line);background:var(--surface);padding:24px}.capacity-map-stage{display:flex;align-items:center;flex:1;min-width:0}.capacity-map-stage article{flex:1;min-height:180px;padding:17px;border-top:3px solid var(--green);background:var(--paper)}.capacity-map-stage article>span{color:var(--muted);font:8px var(--mono)}.capacity-map-stage h3{margin:18px 0 3px}.capacity-map-stage p{color:var(--muted);font-size:10px}.capacity-map-stage>i{padding:8px;color:var(--orange);font-style:normal}.concept-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:24px}.concept-grid article{border:1px solid var(--line);background:var(--surface);padding:20px}.concept-grid span{color:var(--green);font:8px var(--mono)}.concept-grid h3{margin:12px 0 5px}.concept-grid p,.text-equivalent p{color:var(--muted);font-size:11px}.text-equivalent{margin-top:24px;padding:18px;border-left:3px solid var(--green);background:var(--surface)}.text-equivalent p{margin-bottom:0}.formula-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.formula-grid article{display:grid;min-height:220px;padding:22px;border:1px solid var(--line);background:var(--surface)}.formula-grid article>span{color:var(--muted);font:8px var(--mono)}.formula-grid h3{margin:14px 0 4px;font-size:21px}.formula-grid strong{align-self:end;color:var(--orange);font:10px var(--mono)}.formula-grid p{color:var(--muted);font-size:11px}@media(max-width:1000px){.capacity-workbench{grid-template-columns:1fr}.capacity-controls{position:static}.capacity-results{min-height:600px}.capacity-empty{min-height:520px}.capacity-map{overflow-x:auto}.capacity-map-stage{min-width:205px}}@media(max-width:640px){.capacity-controls,.capacity-results{padding:16px}.capacity-field-grid,.estimate-notes,.formula-grid,.concept-grid{grid-template-columns:1fr}.capacity-metrics{grid-template-columns:1fr 1fr}.capacity-metrics article:nth-child(2){border-right:0}.capacity-metrics article:nth-child(-n+2){border-bottom:1px solid var(--line)}.demand-split{grid-template-columns:1fr 1fr}.demand-split>i{display:none}.result-heading,.section-label{display:grid}.capacity-empty h2{font-size:33px}.calculation-trail li{grid-template-columns:1fr}.calculation-trail b{padding-top:3px}}.header-search{margin-right:16px;font-size:13px;text-underline-offset:4px}.header-tools{display:flex;align-items:center;gap:16px;margin-right:16px}.header-tools .header-search{margin:0;padding-block:12px}@media(max-width:640px){.header-tools{margin-left:auto}}.home-path-link{padding-top:32px}.home-path-link a{color:var(--green);font-weight:700}.home-path-link p{color:var(--muted);margin:6px 0 0}