:root{--ink:#171a21;--ink-2:#21252e;--ink-3:#2c313d;--paper:#f7f6f2;--surface:#fff;--cobalt:#2743e3;--cobalt-soft:#e8ebfc;--amber:#e8a33d;--amber-soft:#fbf0dc;--green:#2e8b57;--green-soft:#e2f1e8;--red:#c94f3d;--red-soft:#f9e8e5;--slate:#5c6270;--line:#e3e1da;--line-strong:#cfccc2;--text:#22252c;--text-on-ink:#e9e9e4;--muted-on-ink:#8b90a0;--font-display:"Space Grotesk", "Avenir Next", sans-serif;--font-body:"IBM Plex Sans", "Helvetica Neue", sans-serif;--font-mono:"IBM Plex Mono", "SF Mono", monospace;--sidebar-w:292px;--header-h:48px;--content-max:860px;--radius:10px;--radius-sm:6px;--shadow-card:0 1px 2px #171a210d, 0 4px 16px #171a210a}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}body{font-family:var(--font-body);color:var(--text);background:var(--paper);-webkit-font-smoothing:antialiased;font-size:16px;line-height:1.65}a{color:var(--cobalt);text-decoration:none}a:hover{text-decoration:underline}:focus-visible{outline:2px solid var(--cobalt);outline-offset:2px;border-radius:2px}code{font-family:var(--font-mono);color:#1f38b8;background:#2743e312;border:1px solid #2743e31f;border-radius:4px;padding:.08em .35em;font-size:.86em}.shell{min-height:100vh}.app-header{z-index:50;min-height:var(--header-h);background:var(--ink);border-bottom:1px solid var(--ink-3);grid-template-columns:1fr auto 1fr;align-items:center;padding:0 20px;display:grid;position:sticky;top:0}.app-header-start,.app-header-end{align-items:center;display:flex}.app-header-end{justify-content:flex-end}.app-header-title{color:#fff;font-family:var(--font-display);letter-spacing:.01em;font-size:16px;font-weight:600;line-height:1}.menu-btn{display:none}.mode-switch{color:var(--muted-on-ink);font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;cursor:pointer;align-items:center;gap:7px;font-size:10px;font-weight:500;display:inline-flex}.mode-switch span.active{color:#fff}.mode-switch input{appearance:none;border:1px solid var(--slate);background:var(--ink-3);cursor:pointer;border-radius:999px;width:34px;height:18px;transition:background .18s,border-color .18s;position:relative}.mode-switch input:after{content:"";background:var(--surface);border-radius:50%;width:10px;height:10px;transition:transform .18s;position:absolute;top:3px;left:3px}.mode-switch input:checked{border-color:var(--cobalt);background:var(--cobalt)}.mode-switch input:checked:after{transform:translate(16px)}.refer-sidebar,.learn-sidebar{width:var(--sidebar-w);background:var(--ink);color:var(--text-on-ink);inset:var(--header-h) auto 0 0;z-index:40;scrollbar-width:thin;scrollbar-color:var(--ink-3) transparent;flex-direction:column;display:flex;position:fixed;overflow-y:auto}.brand{border-bottom:1px solid var(--ink-3);align-items:center;gap:12px;padding:22px 20px 18px;display:flex}.brand-mark{flex:none}.brand-name{font-family:var(--font-display);letter-spacing:.01em;color:#fff;font-size:17px;font-weight:600;line-height:1.2}.brand-sub{font-family:var(--font-mono);color:var(--muted-on-ink);letter-spacing:.08em;text-transform:uppercase;font-size:10.5px}.nav-scroll{flex:1;padding:14px 12px 24px}.nav-group{margin-top:18px}.nav-group:first-child{margin-top:4px}.nav-group-label{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted-on-ink);align-items:baseline;gap:8px;padding:6px 10px;font-size:10.5px;font-weight:500;display:flex}.nav-group-label:after{content:"";border-top:1px solid var(--ink-3);flex:1;transform:translateY(-2px)}.nav-link{border-radius:var(--radius-sm);color:var(--text-on-ink);border-left:2px solid #0000;align-items:center;gap:10px;margin:1px 0;padding:8px 10px;font-size:14px;font-weight:450;line-height:1.35;display:flex}.nav-link:hover{background:var(--ink-2);color:#fff;text-decoration:none}.nav-link.active{background:var(--ink-2);color:#fff;border-left-color:var(--amber)}.nav-link .nav-num{font-family:var(--font-mono);color:var(--muted-on-ink);flex:none;width:20px;font-size:11px}.nav-link.active .nav-num{color:var(--amber)}.nav-item-row{align-items:center;gap:2px;display:flex}.nav-item-row .nav-link{flex:1;min-width:0}.nav-toggle{border:1px solid var(--ink-3);border-radius:var(--radius-sm);width:24px;height:24px;color:var(--muted-on-ink);font-family:var(--font-mono);cursor:pointer;background:0 0;flex:none;font-size:13px;line-height:1}.nav-toggle:hover{color:#fff;border-color:var(--slate)}.nav-children{border-left:1px solid var(--ink-3);margin:1px 0 3px 19px;padding-left:9px}.nav-link.nav-child{padding:6px 8px;font-size:13px}.nav-link.nav-child .nav-num{width:32px;font-size:10px}.nav-toggle-sm{width:20px;height:20px;font-size:11px}.nav-grandchildren{border-left:1px solid var(--ink-3);margin:1px 0 2px 14px;padding-left:8px}.nav-link.nav-grandchild{padding:5px 7px;font-size:12px}.nav-link.nav-grandchild .nav-num{width:42px;font-size:9px}.refer-sidebar-foot{border-top:1px solid var(--ink-3);font-family:var(--font-mono);color:var(--muted-on-ink);letter-spacing:.05em;padding:14px 20px 18px;font-size:10.5px}.scrim{display:none}.main{margin-left:var(--sidebar-w);flex:1;min-width:0}.home-shell .main{margin-left:0}.page{max-width:var(--content-max);margin:0 auto;padding:56px 48px 96px}@media (width<=920px){.menu-btn{border:1px solid var(--ink-3);color:var(--text-on-ink);border-radius:var(--radius-sm);font-family:var(--font-mono);cursor:pointer;background:0 0;align-items:center;gap:7px;padding:7px 10px;font-size:12px;display:inline-flex}.refer-sidebar,.learn-sidebar{box-shadow:none;transition:transform .25s;transform:translate(-100%)}.refer-sidebar.open,.learn-sidebar.open{transform:translate(0);box-shadow:0 0 40px #0006}.scrim{z-index:35;background:#171a2180;border:0;display:block;position:fixed;inset:0}.main{margin-left:0}.page{padding:32px 20px 72px}}.eyebrow{font-family:var(--font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--cobalt);align-items:center;gap:10px;font-size:12px;font-weight:500;display:flex}.eyebrow:before{content:"";border-top:2px solid var(--amber);width:22px}.page-title{font-family:var(--font-display);letter-spacing:-.015em;color:var(--ink);margin:14px 0 16px;font-size:clamp(30px,4.4vw,42px);font-weight:700;line-height:1.08}.lede{color:var(--slate);max-width:62ch;font-size:18px;line-height:1.6}.page-header{margin-bottom:44px}.section{margin-top:56px;scroll-margin-top:24px}.section-title{font-family:var(--font-display);letter-spacing:-.01em;color:var(--ink);align-items:baseline;gap:12px;margin-bottom:14px;font-size:24px;font-weight:600;display:flex}.section-kicker{font-family:var(--font-mono);color:var(--amber);letter-spacing:.05em;flex:none;font-size:12px;font-weight:500;transform:translateY(-2px)}.section>p,.section-body>p,.prose p{max-width:68ch;margin-bottom:14px}.prose ul,.prose ol{max-width:66ch;margin:0 0 16px 22px}.prose li{margin-bottom:7px}.prose strong{color:var(--ink);font-weight:600}.card-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:22px 0;display:grid}.card-grid.cols-2{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}.concept-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-card);flex-direction:column;gap:8px;padding:18px 18px 16px;display:flex}.concept-card.clickable{cursor:pointer;text-align:left;font:inherit;color:inherit;transition:border-color .15s,transform .15s}.concept-card.clickable:hover{border-color:var(--cobalt);transform:translateY(-1px)}.concept-card.selected{border-color:var(--cobalt);box-shadow:0 0 0 1px var(--cobalt), var(--shadow-card)}.card-glyph{font-family:var(--font-mono);color:var(--cobalt);background:var(--cobalt-soft);letter-spacing:.06em;border-radius:4px;align-self:flex-start;padding:3px 7px;font-size:11px;font-weight:600}.card-title{font-family:var(--font-display);color:var(--ink);font-size:16.5px;font-weight:600;line-height:1.25}.card-body{color:var(--slate);font-size:14px;line-height:1.55}.callout{border-radius:var(--radius);border:1px solid;gap:12px;margin:20px 0;padding:14px 16px;font-size:14.5px;line-height:1.55;display:flex}.callout-icon{font-family:var(--font-mono);letter-spacing:.08em;flex:none;padding-top:2px;font-size:11px;font-weight:600}.callout.info{background:var(--cobalt-soft);color:#22307c;border-color:#c6cef7}.callout.info .callout-icon{color:var(--cobalt)}.callout.tip{background:var(--green-soft);color:#1e5637;border-color:#bcdccb}.callout.tip .callout-icon{color:var(--green)}.callout.warn{background:var(--red-soft);color:#7c2c1f;border-color:#edc6bf}.callout.warn .callout-icon{color:var(--red)}.pill{font-family:var(--font-mono);letter-spacing:.04em;border:1px solid var(--line-strong);background:var(--surface);color:var(--slate);white-space:nowrap;border-radius:999px;padding:2.5px 10px;font-size:11px;font-weight:500;display:inline-block}.pill.cobalt{background:var(--cobalt-soft);color:#1f38b8;border-color:#c6cef7}.pill.amber{background:var(--amber-soft);color:#8a5b13;border-color:#ecd3a8}.pill.green{background:var(--green-soft);color:#1e5637;border-color:#bcdccb}.pill-row{flex-wrap:wrap;gap:6px;margin:8px 0 4px;display:flex}.code-block{background:var(--ink);color:#d7dae2;border-radius:var(--radius);margin:20px 0;font-size:13px;overflow:hidden}.code-block-head{border-bottom:1px solid var(--ink-3);font-family:var(--font-mono);color:var(--muted-on-ink);letter-spacing:.06em;justify-content:space-between;padding:8px 14px;font-size:11px;display:flex}.code-block pre{padding:14px 16px;line-height:1.6;overflow-x:auto}.code-block code{color:inherit;background:0 0;border:0;padding:0;font-size:12.5px}.table-wrap{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow-card);margin:22px 0;overflow-x:auto}table.compare{border-collapse:collapse;width:100%;min-width:640px;font-size:13.5px}table.compare th{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;text-align:left;color:var(--slate);background:var(--paper);border-bottom:1px solid var(--line-strong);white-space:nowrap;padding:10px 14px;font-size:11px;font-weight:600}table.compare td{border-bottom:1px solid var(--line);vertical-align:top;padding:11px 14px;line-height:1.5}table.compare tr:last-child td{border-bottom:0}table.compare td:first-child{color:var(--ink);white-space:nowrap;font-weight:600}.tabs{margin:22px 0}.tab-list{border-bottom:2px solid var(--line);flex-wrap:wrap;gap:4px;display:flex}.tab-btn{font-family:var(--font-display);color:var(--slate);cursor:pointer;background:0 0;border:0;border-bottom:2px solid #0000;margin-bottom:-2px;padding:9px 14px;font-size:14px;font-weight:500}.tab-btn:hover{color:var(--ink)}.tab-btn.active{color:var(--cobalt);border-bottom-color:var(--cobalt)}.tab-panel{padding-top:18px}.diagram-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-card);margin:24px 0;overflow:hidden}.diagram-head{border-bottom:1px solid var(--line);background:linear-gradient(var(--paper), var(--surface));justify-content:space-between;align-items:center;gap:12px;padding:10px 16px;display:flex}.diagram-title{font-family:var(--font-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--slate);font-size:11.5px;font-weight:600}.diagram-body{background-image:radial-gradient(var(--line) 1px, transparent 1px);background-size:22px 22px;padding:20px;overflow-x:auto}.diagram-body svg{max-width:100%;height:auto;margin:0 auto;display:block}.diagram-caption{border-top:1px solid var(--line);color:var(--slate);padding:10px 16px 12px;font-size:13px}.dg-label{font-family:var(--font-mono);font-weight:500}.dg-title{font-family:var(--font-display);font-weight:600}.control-row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.btn{font-family:var(--font-display);border:1px solid var(--line-strong);background:var(--surface);color:var(--ink);border-radius:var(--radius-sm);cursor:pointer;padding:7px 14px;font-size:13.5px;font-weight:600;transition:border-color .12s,background .12s}.btn:hover{border-color:var(--cobalt);color:var(--cobalt)}.btn.primary{background:var(--cobalt);border-color:var(--cobalt);color:#fff}.btn.primary:hover{color:#fff;background:#1f38b8}.btn:disabled{opacity:.45;cursor:default;pointer-events:none}.architecture-activity{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow-card);margin:24px 0;overflow:hidden}.architecture-activity-brief{border-bottom:1px solid var(--line);background:var(--paper);padding:16px 18px}.architecture-activity-brief>span,.architecture-palette-title,.architecture-workflow-readout>span{font-family:var(--font-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--slate);font-size:10.5px;font-weight:600}.architecture-activity-brief p{max-width:72ch;margin:5px 0 0;line-height:1.55}.architecture-workbench{grid-template-columns:152px minmax(0,1fr);min-height:480px;display:grid}.architecture-palette{border-right:1px solid var(--line);background:var(--ink);color:var(--text-on-ink);padding:14px 10px}.architecture-palette-title{color:var(--muted-on-ink);padding:0 6px 10px}.architecture-palette-item{border-top:1px solid var(--ink-3);grid-template-columns:30px minmax(0,1fr) 24px;align-items:center;gap:7px;min-height:48px;padding:6px;font-size:12px;line-height:1.2;display:grid}.architecture-palette-item button{border:1px solid var(--ink-3);border-radius:var(--radius-sm);background:var(--ink-2);width:24px;height:24px;color:var(--text-on-ink);font:600 15px/1 var(--font-mono);cursor:pointer}.architecture-palette-item button:hover{border-color:var(--cobalt);color:#fff}.architecture-palette-shape{border:1.5px solid var(--muted-on-ink);background:var(--ink-2);width:28px;height:20px;display:block}.architecture-palette-shape.start,.architecture-palette-shape.end{border-radius:50%;width:23px;height:23px;margin-left:2px}.architecture-palette-shape.decision{width:21px;height:21px;margin-left:3px;transform:rotate(45deg)}.architecture-palette-arrow{color:var(--amber);font:20px/1 var(--font-mono);text-align:center}.architecture-board{touch-action:none;background-color:var(--surface);background-image:radial-gradient(var(--line) 1px, transparent 1px);background-size:22px 22px;min-width:0;min-height:480px;position:relative;overflow:hidden}.architecture-board-empty{color:var(--slate);text-align:center;pointer-events:none;place-items:center;padding:24px;font-size:13px;display:grid;position:absolute;inset:0}.architecture-board-element{border:1.5px solid var(--cobalt);border-radius:var(--radius-sm);background:var(--cobalt-soft);cursor:grab;-webkit-user-select:none;user-select:none;box-shadow:var(--shadow-card);place-items:center;display:grid;position:absolute}.architecture-board-element:active{cursor:grabbing}.architecture-board-element.start,.architecture-board-element.end{border-radius:50%}.architecture-board-element.end{border-color:var(--green);background:var(--green-soft)}.architecture-board-element.decision{box-shadow:none;background:0 0;border:0}.architecture-board-element.decision:before{content:"";border:1.5px solid var(--amber);background:var(--amber-soft);box-shadow:var(--shadow-card);border-radius:3px;position:absolute;inset:8px 20px;transform:rotate(45deg)}.architecture-board-element input{z-index:1;width:calc(100% - 24px);color:var(--ink);font-family:var(--font-display);text-align:center;background:0 0;border:0;border-bottom:1px solid #0000;outline:0;font-size:12px;font-weight:600;position:relative}.architecture-board-element input:focus{border-bottom-color:var(--cobalt)}.architecture-element-delete{z-index:2;border:1px solid var(--line-strong);background:var(--surface);width:20px;height:20px;color:var(--slate);font:13px/1 var(--font-mono);cursor:pointer;border-radius:50%;position:absolute;top:-9px;right:-9px}.architecture-element-drag{z-index:2;border:1px solid var(--line-strong);background:var(--surface);height:18px;color:var(--slate);font:8px/1 var(--font-mono);letter-spacing:.06em;cursor:grab;touch-action:none;border-radius:3px;padding:0 5px;position:absolute;top:-9px;left:6px}.architecture-element-drag:active{cursor:grabbing}.architecture-arrow-rotate{width:100%;height:100%;color:var(--cobalt);cursor:pointer;background:0 0;border:0}.architecture-arrow-rotate span{font:30px/1 var(--font-mono);transition:transform .15s;display:inline-block}.architecture-workflow-readout{border-top:1px solid var(--line);border-bottom:1px solid var(--line);align-items:baseline;gap:12px;min-height:44px;padding:10px 16px;display:flex;overflow-x:auto}.architecture-workflow-readout strong{font-family:var(--font-mono);color:var(--cobalt);white-space:nowrap;font-size:12px}.architecture-activity-actions{justify-content:flex-end;gap:10px;padding:12px 16px;display:flex}.architecture-feedback{border-top:1px solid;gap:12px;padding:13px 16px;font-size:14px;display:flex}.architecture-feedback strong{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;font-size:11px}.architecture-feedback.hint{border-color:var(--amber);background:var(--amber-soft);color:#8a5b13}.architecture-feedback.success{border-color:var(--green);background:var(--green-soft);color:#1e5637}.architecture-feedback.incorrect{border-color:var(--red);background:var(--red-soft);color:#7c2c1f}@media (width<=680px){.architecture-workbench{grid-template-columns:1fr}.architecture-palette{border-right:0;border-bottom:1px solid var(--line);grid-template-columns:repeat(2,minmax(0,1fr));gap:0 8px;display:grid}.architecture-palette-title{grid-column:1/-1}.architecture-board{min-height:440px}.architecture-activity-actions{justify-content:stretch}.architecture-activity-actions .btn{flex:1}}.multiple-choice-activity{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow-card);margin:24px 0;overflow:hidden}.multiple-choice-brief{border-bottom:1px solid var(--line);background:var(--paper);padding:16px 18px}.multiple-choice-brief>span,.multiple-choice-instruction,.multiple-choice-option-key{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--slate);font-size:10.5px;font-weight:600}.multiple-choice-brief p{max-width:72ch;margin:5px 0 0;line-height:1.55}.multiple-choice-questions{gap:0;display:grid}.multiple-choice-question{border:0;border-bottom:1px solid var(--line);min-width:0;padding:18px}.multiple-choice-question.correct{box-shadow:inset 3px 0 0 var(--green)}.multiple-choice-question.incorrect{box-shadow:inset 3px 0 0 var(--red)}.multiple-choice-question legend{color:var(--ink);font-family:var(--font-display);align-items:baseline;gap:10px;padding:0;font-size:16px;font-weight:600;line-height:1.4;display:flex}.multiple-choice-question legend>span{color:var(--amber);font-family:var(--font-mono);letter-spacing:.06em;font-size:11px}.multiple-choice-instruction{text-transform:none;letter-spacing:.03em;margin:5px 0 10px}.multiple-choice-options{gap:8px;margin-top:12px;display:grid}.multiple-choice-option{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);min-height:44px;color:var(--text);cursor:pointer;grid-template-columns:18px 24px minmax(0,1fr);align-items:center;gap:9px;padding:9px 11px;font-size:14px;line-height:1.45;display:grid}.multiple-choice-option:hover{border-color:var(--cobalt);background:var(--cobalt-soft)}.multiple-choice-option:has(input:checked){border-color:var(--cobalt);background:var(--cobalt-soft)}.multiple-choice-option:has(input:focus-visible){outline:2px solid var(--cobalt);outline-offset:2px}.multiple-choice-option input{width:16px;height:16px;accent-color:var(--cobalt);margin:0}.multiple-choice-option-key{color:var(--cobalt)}.multiple-choice-explanation{border-left:3px solid;gap:10px;margin-top:12px;padding:11px 12px;font-size:13.5px;line-height:1.5;display:flex}.multiple-choice-explanation strong,.multiple-choice-feedback strong{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;flex:none;font-size:10.5px}.multiple-choice-explanation.correct{border-color:var(--green);background:var(--green-soft);color:var(--ink)}.multiple-choice-explanation.incorrect{border-color:var(--red);background:var(--red-soft);color:var(--ink)}.multiple-choice-actions{justify-content:flex-end;gap:10px;padding:12px 16px;display:flex}.multiple-choice-feedback{border-top:1px solid;gap:12px;padding:13px 16px;font-size:14px;display:flex}.multiple-choice-feedback.hint{border-color:var(--amber);background:var(--amber-soft);color:var(--ink)}.multiple-choice-feedback.success{border-color:var(--green);background:var(--green-soft);color:var(--ink)}.multiple-choice-feedback.incorrect{border-color:var(--red);background:var(--red-soft);color:var(--ink)}.activity-math{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);color:var(--ink);font-family:var(--font-mono);text-align:center;white-space:nowrap;margin:18px 0;padding:14px 16px;font-size:13px;overflow-x:auto}@media (width<=680px){.multiple-choice-question legend{align-items:flex-start}.multiple-choice-explanation,.multiple-choice-feedback{flex-direction:column;gap:4px}.multiple-choice-actions{justify-content:stretch}.multiple-choice-actions .btn{flex:1}}.loop-stepper,.loop-stepper-events{gap:8px;display:grid}.loop-stepper-event{border:1px solid var(--line-strong);border-radius:var(--radius-sm);background:var(--paper);color:var(--ink);align-items:baseline;gap:12px;padding:8px 12px;font-size:13.5px;line-height:1.5;display:flex}.loop-stepper-event.user,.loop-stepper-event.amber{border-color:var(--amber);background:var(--amber-soft)}.loop-stepper-event.assistant,.loop-stepper-event.cobalt{border-color:var(--cobalt);background:var(--cobalt-soft)}.loop-stepper-event.tool,.loop-stepper-event.green{border-color:var(--green);background:var(--green-soft)}.loop-stepper-event.red{border-color:var(--red);background:var(--red-soft)}.loop-stepper-event.active{border-width:2px;border-color:var(--cobalt)}.loop-stepper-tag,.loop-stepper-tokens,.loop-stepper-budget-label{color:var(--slate);font-family:var(--font-mono)}.loop-stepper-tag{letter-spacing:.08em;flex:none;width:42px;font-size:10.5px;font-weight:600}.loop-stepper-content{flex:1;min-width:0}.loop-stepper-content strong{color:var(--ink);font-weight:600}.loop-stepper-tokens{flex:none;font-size:11px}.loop-stepper-budget{margin-top:8px}.loop-stepper-budget-label{justify-content:space-between;gap:12px;margin-bottom:4px;font-size:11px;display:flex}.loop-stepper-meter{border:1px solid var(--line-strong);background:var(--paper);border-radius:6px;height:12px;overflow:hidden}.loop-stepper-meter-fill{background:var(--cobalt);height:100%;transition:width .3s}.loop-stepper-meter-fill.is-risk{background:var(--red)}.slider-row{grid-template-columns:150px 1fr 64px;align-items:center;gap:12px;margin:10px 0;font-size:13.5px;display:grid}.slider-row label{color:var(--ink);font-weight:500}.slider-row .val{font-family:var(--font-mono);color:var(--slate);text-align:right;font-size:12px}input[type=range]{accent-color:var(--cobalt);width:100%}.switch-row{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:9px;font-size:14px;font-weight:500;display:flex}.switch-row input{accent-color:var(--cobalt);width:16px;height:16px}@media (width<=560px){.loop-stepper-event{flex-wrap:wrap;align-items:flex-start}.loop-stepper-content{flex-basis:calc(100% - 54px)}.loop-stepper-tokens{margin-left:54px}}.budget-bar{border-radius:var(--radius-sm);border:1px solid var(--line-strong);background:repeating-linear-gradient(-45deg, var(--paper), var(--paper) 6px, #efeee9 6px, #efeee9 12px);height:34px;margin:16px 0 8px;display:flex;overflow:hidden}.budget-seg{min-width:0;height:100%;transition:width .25s}.legend{color:var(--slate);flex-wrap:wrap;gap:14px;margin-top:8px;font-size:12.5px;display:flex}.legend-item{align-items:center;gap:6px;display:inline-flex}.legend-swatch{border-radius:3px;flex:none;width:11px;height:11px}.problem-box{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--amber);border-radius:var(--radius);box-shadow:var(--shadow-card);grid-template-columns:1fr 1fr;margin:8px 0 40px;display:grid;overflow:hidden}.problem-box-col{padding:18px 22px}.problem-box-col+.problem-box-col{border-left:1px solid var(--line)}.problem-box-label{font-family:var(--font-mono);letter-spacing:.1em;text-transform:uppercase;color:#8a5b13;margin-bottom:8px;font-size:11px;font-weight:600}.problem-box-col p{color:var(--text);font-size:14.5px;line-height:1.6}.problem-box-list{color:var(--text);margin:0;padding-left:18px;font-size:14px;line-height:1.65}.problem-box-list li{margin-bottom:7px}@media (width<=720px){.problem-box{grid-template-columns:1fr}.problem-box-col+.problem-box-col{border-left:none;border-top:1px solid var(--line)}}.detail-panel{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--cobalt);border-radius:var(--radius);box-shadow:var(--shadow-card);margin:18px 0;padding:18px 20px}.detail-panel h4{font-family:var(--font-display);color:var(--ink);margin-bottom:8px;font-size:17px;font-weight:600}.detail-panel p{color:var(--text);margin-bottom:8px;font-size:14.5px;line-height:1.6}.detail-panel p:last-child{margin-bottom:0}.hero{background:var(--ink);color:var(--text-on-ink);border-radius:16px;margin-bottom:48px;padding:40px 40px 0;position:relative;overflow:hidden}.hero .eyebrow{color:var(--amber)}.hero .eyebrow:before{border-color:var(--cobalt)}.hero h1{font-family:var(--font-display);letter-spacing:-.02em;color:#fff;max-width:17ch;margin:14px 0;font-size:clamp(32px,4.6vw,46px);font-weight:700;line-height:1.06}.hero p{color:#a7abb9;max-width:56ch;margin-bottom:24px;font-size:16.5px}.hero-ticker-wrap{margin:2px calc(-1 * max(24px, (100% - var(--content-max)) / 2)) 0;overflow:auto hidden}.hero-ticker{width:100%;min-width:760px;height:auto;display:block}@media (width<=920px){.hero-ticker-wrap{margin-left:-22px;margin-right:-22px}}.landing-page{max-width:none;padding:0 0 64px}.landing-hero{padding:28px max(24px, calc((100% - var(--content-max)) / 2)) 0;border-radius:0;margin:0}.landing-hero h1{letter-spacing:0;text-align:center;max-width:none;margin:0;font-size:52px}.landing-home-action{justify-content:center;margin:10px 0 0;display:flex}.landing-home-action a{border-bottom:1px solid var(--amber);color:var(--surface);font-family:var(--font-display);padding:0 0 5px;font-size:16px;font-weight:600}.landing-home-action a:hover{color:var(--amber);text-decoration:none}.landing-home-action span{color:var(--amber);font-family:var(--font-mono);margin-left:4px}.landing-hero-thesis{max-width:58ch;font-size:18px}.landing-reference-nav{flex-wrap:wrap;gap:8px;margin:26px 0 18px;display:flex}.landing-reference-nav a{border:1px solid var(--ink-3);border-radius:var(--radius-sm);color:var(--text-on-ink);font-family:var(--font-mono);align-items:baseline;gap:7px;padding:8px 10px;font-size:11px;line-height:1.2;display:inline-flex}.landing-reference-nav a:hover{border-color:var(--amber);color:var(--surface);text-decoration:none}.landing-reference-nav a:first-child{color:var(--amber)}.landing-intro{padding:20px 48px 28px}.landing-intro p{font-size:17px;line-height:1.7}.landing-section{margin-top:28px;scroll-margin-top:24px}.landing-list-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;padding:0 48px;display:grid}.landing-list-section{min-width:0}.landing-scroll-list{border:1px solid var(--line);scrollbar-color:var(--line-strong) var(--paper);scrollbar-width:thin;height:500px;margin-top:16px;overflow-y:auto}.landing-list-item{border-bottom:1px solid var(--line);color:inherit;flex-direction:column;justify-content:center;gap:6px;height:100px;padding:12px 16px;display:flex;overflow:hidden}.landing-list-item:last-child{border-bottom:0}.landing-list-item:hover{background:var(--surface);text-decoration:none}.landing-resource-tag{color:var(--cobalt);font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;font-size:10px;font-weight:500;line-height:1}.landing-list-item .landing-resource-title{color:var(--cobalt);font-size:15px}.landing-list-item .landing-resource-summary{-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:13px;line-height:1.4;display:-webkit-box;overflow:hidden}.landing-section-heading{border-top:2px solid var(--ink);grid-template-columns:118px 1fr;gap:16px;padding-top:15px;display:grid}.landing-section-heading>span,.landing-resource-meta,.landing-reference-link>span{color:var(--slate);font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;font-size:11px;font-weight:500}.landing-section-heading>span .landing-list-icon{font-size:33px;line-height:1;display:inline-block}.landing-section-heading h2{color:var(--ink);font-family:var(--font-display);letter-spacing:0;font-size:27px;font-weight:650;line-height:1.18}.landing-reference-grid{border-bottom:1px solid var(--line);border-top:1px solid var(--line);grid-template-columns:repeat(5,minmax(0,1fr));margin-top:24px;display:grid}.landing-reference-link{border-left:1px solid var(--line);flex-direction:column;gap:10px;min-height:172px;padding:16px;display:flex}.landing-reference-link:first-child{border-left:0}.landing-reference-link:hover{background:var(--surface);text-decoration:none}.landing-reference-link>span{color:var(--cobalt)}.landing-reference-link strong,.landing-resource-title{color:var(--ink);font-family:var(--font-display);font-size:16px;font-weight:600;line-height:1.25}.landing-reference-link small{color:var(--slate);font-size:13px;line-height:1.5}.landing-resource-list{border-top:1px solid var(--line);margin-top:24px}.landing-resource{border-bottom:1px solid var(--line);color:inherit;grid-template-columns:118px minmax(190px,.8fr) minmax(0,1.7fr) auto;gap:16px;padding:17px 0;display:grid}.landing-resource:hover{background:var(--surface);text-decoration:none}.landing-resource-meta{padding-top:3px}.landing-resource-summary{color:var(--slate);font-size:14px;line-height:1.55}.landing-resource-link{color:var(--cobalt);font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;align-self:center;font-size:11px}@media (width<=920px){.hero{padding:28px 22px 0}.landing-hero{padding:24px 22px 0}.landing-hero h1{font-size:40px}.landing-section-heading{grid-template-columns:1fr;gap:5px}.landing-reference-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.landing-reference-link:nth-child(odd){border-left:0}.landing-reference-link:nth-child(5){border-top:1px solid var(--line)}.landing-resource{grid-template-columns:1fr auto;gap:7px 14px}.landing-resource-title,.landing-resource-summary{grid-column:1/-1}.landing-resource-link{grid-area:1/2}.landing-list-grid{gap:22px;padding:0 22px}}@media (width<=640px){.landing-list-grid{grid-template-columns:1fr}}.next-link{justify-content:flex-end;margin-top:64px;display:flex}.next-link a{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow-card);flex-direction:column;align-items:flex-end;gap:2px;min-width:220px;padding:14px 18px;display:inline-flex}.next-link a:hover{border-color:var(--cobalt);text-decoration:none}.next-link .next-label{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--slate);font-size:10.5px}.next-link .next-title{font-family:var(--font-display);color:var(--ink);font-size:16px;font-weight:600}.next-link a:hover .next-title{color:var(--cobalt)}@keyframes dash-flow{to{stroke-dashoffset:-28px}}.wire-flow{animation:1.6s linear infinite dash-flow}.concept-animation{min-width:620px;overflow:hidden}.concept-animation-controls{flex-wrap:nowrap;gap:6px}.concept-animation-count{min-width:34px;font-family:var(--font-mono);color:var(--slate);text-align:right;font-size:10.5px}.concept-animation-icon{width:30px;height:28px;font-family:var(--font-mono);place-items:center;padding:0;line-height:1;display:inline-grid}.concept-animation-step{border:1px solid var(--line);border-left:3px solid var(--cobalt);border-radius:var(--radius-sm);background:var(--surface);max-width:620px;margin:16px auto 0;padding:12px 14px}.concept-animation-step>span{font-family:var(--font-mono);letter-spacing:.1em;color:var(--cobalt);margin-bottom:3px;font-size:10px;font-weight:600;display:block}.concept-animation-step>strong{font-family:var(--font-display);color:var(--ink);font-size:14px;display:block}.concept-animation-step>p{color:var(--slate);margin:4px 0 0;font-size:13px;line-height:1.5}.workflow-animation{grid-template-columns:minmax(0,65fr) minmax(0,35fr);align-items:stretch;gap:22px;min-width:620px;display:grid}.workflow-animation-flow,.workflow-animation-data{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);min-width:0;padding:14px}.workflow-animation-flow-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.workflow-animation-flow-head .workflow-animation-label{margin-bottom:0}.workflow-animation-zoom{flex-wrap:nowrap;gap:5px}.workflow-animation-zoom-icon{width:28px;height:26px;font-family:var(--font-mono);place-items:center;padding:0;line-height:1;display:inline-grid}.workflow-animation-zoom-value{min-width:48px;height:26px;font-family:var(--font-mono);padding:0 7px;font-size:10px}.workflow-animation-viewport{overscroll-behavior:contain;width:100%;overflow:hidden}.workflow-animation-flow svg{width:100%;min-width:0;max-width:none;height:auto;display:block}.workflow-animation-node{cursor:pointer;outline:none}.workflow-animation-node:focus-visible rect{stroke:var(--cobalt);stroke-width:3px}.workflow-animation-label{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--slate);margin-bottom:12px;font-size:10px;font-weight:600}.workflow-animation-data table{border-collapse:collapse;table-layout:fixed;width:100%}.workflow-animation-data th,.workflow-animation-data td{border:1px solid var(--line);text-align:left;vertical-align:top;padding:16px 14px}.workflow-animation-data th{width:92px;font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--cobalt);background:var(--cobalt-soft);font-size:10px;font-weight:600}.workflow-animation-data td{min-height:72px;font-family:var(--font-mono);white-space:pre-wrap;overflow-wrap:anywhere;color:var(--ink);font-size:11.5px;line-height:1.55}@media (width<=620px){.diagram-head:has(.concept-animation-controls){flex-direction:column;align-items:flex-start}.concept-animation-controls{justify-content:flex-end;width:100%}.workflow-animation{grid-template-columns:1fr;min-width:0}.workflow-animation-flow,.workflow-animation-data{padding:10px}.workflow-animation-data th{width:76px}.workflow-animation-data th,.workflow-animation-data td{padding:12px 10px}.workflow-animation-flow-head{align-items:flex-start}}.diagram-head:has(.tradeoff-dimension-tabs){flex-direction:column;align-items:flex-start}.tradeoff-dimension-tabs{flex-wrap:wrap;gap:6px;width:100%;display:flex}.tradeoff-dimension-tab{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);min-height:32px;color:var(--slate);font-family:var(--font-display);cursor:pointer;align-items:center;gap:7px;padding:6px 10px;font-size:12px;font-weight:600;display:inline-flex}.tradeoff-dimension-tab>span{font-family:var(--font-mono);letter-spacing:.06em;color:var(--slate);font-size:9.5px}.tradeoff-dimension-tab:hover,.tradeoff-dimension-tab.active{border-color:var(--cobalt);color:var(--cobalt)}.tradeoff-dimension-tab.active{background:var(--cobalt-soft)}.tradeoff-explorer{gap:20px;display:grid}.tradeoff-heading{border-bottom:1px solid var(--line);justify-content:space-between;align-items:flex-start;gap:24px;padding-bottom:16px;display:flex}.tradeoff-kicker{color:var(--slate);font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;margin-bottom:5px;font-size:9.5px;font-weight:600;display:block}.tradeoff-heading h3{color:var(--ink);font-family:var(--font-display);margin:0;font-size:20px}.tradeoff-heading p{color:var(--slate);margin:4px 0 0;font-size:13px}.tradeoff-readout{flex-direction:column;align-items:flex-end;min-width:118px;display:flex}.tradeoff-readout strong{color:var(--cobalt);font-family:var(--font-mono);font-size:24px;line-height:1.1}.tradeoff-readout span{color:var(--slate);font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;margin-top:3px;font-size:9.5px}.tradeoff-presets{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.tradeoff-preset{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);text-align:left;cursor:pointer;min-width:0;padding:11px 12px}.tradeoff-preset:hover,.tradeoff-preset.selected{border-color:var(--cobalt)}.tradeoff-preset.selected{background:var(--cobalt-soft)}.tradeoff-preset strong,.tradeoff-preset span{display:block}.tradeoff-preset strong{color:var(--ink);font-family:var(--font-display);font-size:12.5px}.tradeoff-preset span{color:var(--slate);margin-top:3px;font-size:11.5px;line-height:1.35}.tradeoff-control{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);padding:16px}.tradeoff-poles{color:var(--slate);font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;justify-content:space-between;gap:18px;margin-bottom:10px;font-size:9.5px;display:flex}.tradeoff-poles span:last-child{text-align:right}.tradeoff-slider-row{grid-template-columns:30px minmax(0,1fr) 30px;align-items:center;gap:10px;display:grid}.tradeoff-step{width:30px;height:28px;font-family:var(--font-mono);place-items:center;padding:0;line-height:1;display:inline-grid}.tradeoff-slider-row input[type=range]{width:100%}.tradeoff-beam{height:42px;margin:10px 14px 0;position:relative}.tradeoff-beam-line{background:linear-gradient(90deg, var(--cobalt), var(--line-strong) 48%, var(--line-strong) 52%, var(--amber));transform-origin:50%;border-radius:2px;height:3px;transition:transform .18s ease-out;position:absolute;top:13px;left:5%;right:5%}.tradeoff-beam-line span{border-radius:50%;width:12px;height:12px;position:absolute;top:-5px}.tradeoff-beam-line span:first-child{background:var(--cobalt);left:-2px}.tradeoff-beam-line span:last-child{background:var(--amber);right:-2px}.tradeoff-beam>i{border-left:8px solid #0000;border-right:8px solid #0000;border-bottom:15px solid var(--line-strong);width:0;height:0;position:absolute;top:17px;left:50%;transform:translate(-50%)}.tradeoff-results{grid-template-columns:minmax(250px,.85fr) minmax(300px,1.15fr);align-items:center;gap:20px;display:grid}.tradeoff-metrics{gap:14px;display:grid}.tradeoff-metric>div:first-child{justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:6px;display:flex}.tradeoff-metric span{color:var(--slate);font-size:12px}.tradeoff-metric strong{color:var(--ink);font-family:var(--font-mono);text-align:right;font-size:11.5px}.tradeoff-meter{background:var(--line);border-radius:4px;height:6px;overflow:hidden}.tradeoff-meter>span{border-radius:inherit;height:100%;transition:width .18s ease-out;display:block}.tradeoff-meter.cobalt>span{background:var(--cobalt)}.tradeoff-meter.amber>span{background:var(--amber)}.tradeoff-meter.green>span{background:var(--green)}.tradeoff-meter.red>span{background:var(--red)}.tradeoff-curve{width:100%;min-width:0;max-width:none;height:auto;display:block}.tradeoff-insight{border:1px solid var(--line);border-left:3px solid var(--cobalt);border-radius:var(--radius-sm);background:var(--surface);padding:13px 15px}.tradeoff-insight>span{color:var(--cobalt);font-family:var(--font-mono);letter-spacing:.1em;font-size:9.5px;font-weight:600}.tradeoff-insight p{color:var(--ink);margin:4px 0 0;font-size:13px;line-height:1.5}@media (width<=720px){.tradeoff-heading{flex-direction:column}.tradeoff-readout{align-items:flex-start}.tradeoff-presets,.tradeoff-results{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){.tradeoff-beam-line,.tradeoff-meter>span{transition:none}}.archify-diagram-controls{flex-wrap:wrap;justify-content:flex-end}.archify-diagram{width:100%;min-height:min(var(--archify-height), 72vh);border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--ink);position:relative;overflow:hidden}.archify-diagram iframe{width:100%;height:min(var(--archify-height), 72vh);background:var(--ink);border:0;display:block}.archify-diagram-status{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted-on-ink);place-items:center;padding:20px;font-size:11px;display:grid;position:absolute;inset:0}@media (width<=620px){.diagram-head:has(.archify-diagram-controls){flex-direction:column;align-items:flex-start}.archify-diagram-controls{justify-content:flex-end;width:100%}.archify-diagram,.archify-diagram iframe{height:520px;min-height:520px}}