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.deep-dive[open]>.deep-dive-summary{border-radius:var(--radius-md) var(--radius-md) 0 0}.article-body .deep-dive-tag{letter-spacing:.06em;font-feature-settings:"palt";color:var(--ink-muted);font-size:.75rem;font-weight:700;line-height:1.4}.article-body .deep-dive-body{border-top:1px solid var(--line);padding:1rem}@media (min-width:64rem){.article-body .deep-dive-summary{padding-inline:1.25rem}.article-body .deep-dive-body{padding:1.25rem}}.article-body .perspective{border-left:3px solid var(--accent);border-radius:0 var(--radius-md) var(--radius-md) 0;background:var(--surface-sunken);font-size:var(--text-sm);padding:.75rem 1rem;line-height:1.8}.article-body .perspective-label{letter-spacing:.06em;font-feature-settings:"palt";color:var(--accent);flex-wrap:wrap;gap:.25rem .75rem;font-size:.75rem;font-weight:700;line-height:1.4;display:flex}.article-body .perspective-title{color:var(--ink)}.article-body .advanced-link{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);flex-wrap:wrap;align-items:center;gap:.25rem .75rem;padding:.75rem 1rem;transition:border-color .15s ease-out;display:flex;position:relative}.article-body .advanced-link:has(a):hover{border-color:var(--accent)}.article-body .advanced-link-lead{letter-spacing:.06em;font-feature-settings:"palt";width:100%;color:var(--ink-muted);font-size:.75rem;font-weight:700;line-height:1.4}.article-body .advanced-link-title{font-weight:700}.article-body a.advanced-link-title{color:var(--ink);text-decoration:none}.article-body a.advanced-link-title:after{content:"";border-radius:var(--radius-md);position:absolute;inset:0}.article-body .advanced-link:hover a.advanced-link-title{color:var(--accent);text-decoration:underline;text-decoration-thickness:1px}.article-body .advanced-link-title.is-pending{color:var(--ink-subtle);font-weight:400}.article-body .level-label{border-radius:var(--radius-sm);font-size:var(--text-xs);white-space:nowrap;border:1px solid;padding:.125rem .375rem;font-weight:700;line-height:1;display:inline-block}.article-body .level-label-intro{border-color:var(--level-intro);background:var(--level-intro-soft);color:var(--level-intro)}.article-body .level-label-practical{border-color:var(--level-practice);background:var(--level-practice-soft);color:var(--level-practice)}.article-body .level-label-advanced{border-color:var(--level-advanced);background:var(--level-advanced-soft);color:var(--level-advanced)}.article-body .footnotes{border-top:1px solid var(--line);font-size:var(--text-sm);color:var(--ink-muted);margin-top:2.5rem;padding-top:1rem}.article-body .footnotes .footnotes-label{font-size:var(--text-sm);color:var(--ink);border-bottom:0;margin-top:0;padding-bottom:0}.article-body sup{line-height:0}.article-body .figure{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface)}.article-body .figure-scroll{background:linear-gradient(to right, var(--surface) 30%, transparent) left center / 2rem 100% no-repeat local, linear-gradient(to left, var(--surface) 30%, transparent) right center / 2rem 100% no-repeat local, linear-gradient(to right, var(--line-strong), transparent) left center / .75rem 100% no-repeat scroll, linear-gradient(to left, var(--line-strong), transparent) right center / .75rem 100% no-repeat scroll;padding:1rem .5rem .5rem;overflow-x:auto}.article-body .figure-svg{width:100%;min-width:32.25rem;height:auto;font-family:var(--font-sans);display:block}.article-body .figure-svg.figure-payoff,.article-body .figure-svg.figure-timeline,.article-body .figure-svg.figure-decision,.article-body .figure-svg.figure-curve,.article-body .figure-svg.figure-lattice{min-width:0;max-width:26rem;margin-inline:auto}.figure-example .figure-svg{width:auto;max-width:100%;height:100%;font-family:var(--font-sans);margin-inline:auto;display:block}.figure-svg.figure-payoff .fig-be-text{paint-order:stroke;stroke:var(--surface);stroke-width:4px;stroke-linejoin:round}.article-body .figure-caption{border-top:1px solid var(--line);font-size:var(--text-sm);line-break:strict;word-break:auto-phrase;flex-wrap:wrap;gap:.25rem .75rem;padding:.5rem 1rem;line-height:1.5;display:flex}.article-body .figure-number{color:var(--ink-muted);font-weight:700}.article-body .figure-title{font-weight:700}.article-body .figure-description{border-top:1px solid var(--line);font-size:var(--text-sm)}.article-body .figure-description-summary{cursor:pointer;color:var(--ink-muted);padding:.5rem 1rem}.article-body .figure-description-summary:hover{background:var(--accent-soft)}.article-body .figure-description-body{padding:0 1rem .75rem}.article-body .figure-description-body>*+*{margin-top:.5rem}.figure-svg text{fill:var(--ink)}.figure-svg .fig-muted-text{fill:var(--ink-muted)}.figure-svg .fig-positive-text{fill:var(--positive)}.figure-svg .fig-negative-text{fill:var(--negative)}.figure-svg .fig-stroke{stroke-width:2px}.figure-svg .fig-dashed{stroke-dasharray:6 4}.figure-svg .fig-positive{stroke:var(--positive);fill:var(--positive)}.figure-svg .fig-negative{stroke:var(--negative);fill:var(--negative)}.figure-svg .fig-flow,.figure-svg .fig-axis{stroke:var(--ink-muted);fill:var(--ink-muted)}.figure-svg .fig-positive .fig-stroke,.figure-svg .fig-negative .fig-stroke{stroke-width:3px}.figure-svg .fig-connector{fill:none;stroke:var(--ink-muted);stroke-width:2px}.figure-svg .fig-guide{stroke:var(--line-strong);stroke-width:1px;stroke-dasharray:3 3}.figure-svg .fig-grid{stroke:var(--line);stroke-width:1px}.figure-svg .fig-axis-line{stroke:var(--line-strong);stroke-width:1px}.figure-svg .fig-zero{stroke:var(--ink-muted);stroke-width:1.5px}.figure-svg .fig-box{fill:var(--surface);stroke:var(--line-strong);stroke-width:1.5px}.figure-svg .fig-lane-head{fill:var(--surface-sunken)}.figure-svg .fig-payoff{fill:none;stroke:var(--accent);stroke-width:3px;stroke-linejoin:round}.figure-svg .fig-positive-area{fill:var(--positive-soft)}.figure-svg .fig-negative-area{fill:var(--negative-soft)}.figure-svg .fig-point{fill:var(--surface);stroke:var(--ink);stroke-width:2px}.figure-svg .fig-point-solid{fill:var(--accent);stroke:var(--accent)}.figure-svg .fig-box-accent{stroke:var(--accent);stroke-width:2.5px}.figure-svg .fig-box-plain{fill:var(--surface-sunken)}.figure-svg .fig-accent-text{fill:var(--accent)}.figure-svg .fig-curve{fill:none;stroke-width:3px;stroke-linejoin:round}.figure-svg .fig-curve-0{stroke:var(--accent)}.figure-svg .fig-curve-1{stroke:var(--ink);stroke-dasharray:8 4}.figure-svg .fig-curve-2{stroke:var(--ink-muted);stroke-dasharray:2 4}.figure-svg .fig-shade{fill:var(--accent);fill-opacity:.4;stroke:none}.param-range{appearance:none;background:0 0}.param-range::-webkit-slider-runnable-track{background:linear-gradient(to right, var(--accent) var(--range-fill,0%), var(--line) var(--range-fill,0%));border-radius:9999px;height:4px}.param-range::-moz-range-track{background:var(--line);border-radius:9999px;height:4px}.param-range::-moz-range-progress{background:var(--accent);border-radius:9999px;height:4px}.param-range::-webkit-slider-thumb{appearance:none;border:2px solid var(--surface);background:var(--accent);width:20px;height:20px;box-shadow:0 0 0 1px var(--accent);border-radius:9999px;margin-top:-8px}.param-range::-moz-range-thumb{border:2px solid var(--surface);background:var(--accent);width:16px;height:16px;box-shadow:0 0 0 1px var(--accent);border-radius:9999px}.param-range:disabled::-webkit-slider-runnable-track{background:var(--line)}.param-range:disabled::-moz-range-progress{background:var(--line)}.param-range:disabled::-webkit-slider-thumb{background:var(--line-control);box-shadow:0 0 0 1px var(--line-control)}.param-range:disabled::-moz-range-thumb{background:var(--line-control);box-shadow:0 0 0 1px var(--line-control)}.timeline-sources-summary,.quiz-explanation-summary{cursor:pointer;align-items:center;min-height:2.5rem;display:inline-flex}.timeline-sources-summary:hover,.quiz-explanation-summary:hover{color:var(--accent)}@property --tw-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-z{syntax:"*";inherits:false;initial-value:0}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-divide-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}@property --tw-content{syntax:"*";inherits:false;initial-value:""}@property --tw-tracking{syntax:"*";inherits:false}