*,:before,:after{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }::backdrop{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }*,:before,:after{box-sizing:border-box;border-width:0;border-style:solid;border-color:#e5e7eb}:before,:after{--tw-content: ""}html,:host{line-height:1.5;-webkit-text-size-adjust:100%;-moz-tab-size:4;-o-tab-size:4;tab-size:4;font-family:ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,"Noto Color Emoji";font-feature-settings:normal;font-variation-settings:normal;-webkit-tap-highlight-color:transparent}body{margin:0;line-height:inherit}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-feature-settings:normal;font-variation-settings:normal;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}button,input,optgroup,select,textarea{font-family:inherit;font-feature-settings:inherit;font-variation-settings:inherit;font-size:100%;font-weight:inherit;line-height:inherit;letter-spacing:inherit;color:inherit;margin:0;padding:0}button,select{text-transform:none}button,input:where([type=button]),input:where([type=reset]),input:where([type=submit]){-webkit-appearance:button;background-color:transparent;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dl,dd,h1,h2,h3,h4,h5,h6,hr,figure,p,pre{margin:0}fieldset{margin:0;padding:0}legend{padding:0}ol,ul,menu{list-style:none;margin:0;padding:0}dialog{padding:0}textarea{resize:vertical}input::-moz-placeholder,textarea::-moz-placeholder{opacity:1;color:#9ca3af}input::placeholder,textarea::placeholder{opacity:1;color:#9ca3af}button,[role=button]{cursor:pointer}:disabled{cursor:default}img,svg,video,canvas,audio,iframe,embed,object{display:block;vertical-align:middle}img,video{max-width:100%;height:auto}[hidden]:where(:not([hidden=until-found])){display:none}.visible{visibility:visible}.hidden{display:none}.filter{filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}:root{--pip-navy: #0b2878;--pip-navy-dark: #071b53;--pip-blue-soft: #eaf0fb;--pip-blue-line: #c8d5f0;--pip-green: #21864f;--pip-green-soft: #e9f7ef;--pip-orange: #bd6611;--pip-orange-soft: #fff3e6;--pip-purple: #6b4bb8;--pip-red: #b93630;--pip-text: #172033;--pip-muted: #5d6678;--pip-bg: #f5f7fb;--pip-card: #ffffff;--pip-shadow: 0 14px 34px rgba(11, 40, 120, .12);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html{background:var(--pip-bg)}body{margin:0;color:var(--pip-text);background:radial-gradient(circle at top left,#fff 0,#f4f7ff 42%,#eef3fb);min-height:100vh}button{font-family:inherit}.app-shell{min-height:100vh}.top-nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.65rem clamp(1rem,4vw,2.5rem);background:#fffffff5;border-bottom:1px solid var(--pip-blue-line);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.brand-button{border:0;background:transparent;display:inline-flex;align-items:center;gap:.75rem;color:var(--pip-navy);cursor:pointer;text-align:left}.brand-button small{display:block;color:var(--pip-muted);font-size:.75rem;margin-top:.1rem}.brand-mark{display:inline-grid;place-items:center;width:2.75rem;height:2.75rem;border-radius:1rem;background:var(--pip-navy);color:#fff;font-weight:800;letter-spacing:.04em}.top-links{display:flex;flex-wrap:wrap;gap:.45rem;justify-content:flex-end}.top-links button,.small-link{border:1px solid var(--pip-blue-line);background:#fff;color:var(--pip-navy);padding:.55rem .8rem;border-radius:999px;cursor:pointer;font-weight:750}.top-links button.active,.top-links button:hover,.small-link:hover{color:#fff;background:var(--pip-navy);border-color:var(--pip-navy)}.page-wrap{width:min(1280px,calc(100% - 2rem));margin:0 auto;padding:1rem 0 2.25rem}.hero-card{display:flex;justify-content:space-between;align-items:center;gap:1.5rem;padding:clamp(1.2rem,3vw,1.8rem);border:1px solid var(--pip-blue-line);border-radius:2rem;background:linear-gradient(135deg,#fff,#edf3ff);box-shadow:var(--pip-shadow);margin-bottom:1.35rem}.eyebrow{display:inline-block;font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--pip-navy);margin-bottom:.35rem}h1,h2,h3{color:var(--pip-navy-dark);margin:0;line-height:1.08}h1{font-size:clamp(1.9rem,3.7vw,3.2rem);letter-spacing:-.04em}h2{font-size:clamp(1.35rem,2.3vw,2rem)}h3{font-size:1.22rem}p{line-height:1.5}.hero-card p,.section-header p,.compact-header p{color:var(--pip-muted);font-size:1.04rem;max-width:760px}.compact-header{margin:.35rem 0 1rem}.compact-header h1{font-size:clamp(1.75rem,3vw,2.65rem)}.utility-row,.hero-actions,.journey-start-row{display:flex;flex-wrap:wrap;gap:.7rem;align-items:center;margin:.8rem 0 1rem}.primary-action,.secondary-action,.support-action{border-radius:999px;padding:.78rem 1.1rem;font-weight:800;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,background .16s ease}.primary-action{border:0;color:#fff;background:var(--pip-navy);box-shadow:0 10px 22px #0b28783d}.secondary-action{color:var(--pip-navy);background:#fff;border:1px solid var(--pip-blue-line)}.support-action{border:0;color:#fff;background:var(--pip-orange);box-shadow:0 10px 22px #bd661133}.primary-action:hover,.secondary-action:hover,.support-action:hover,.tile:hover{transform:translateY(-2px)}.section-header{margin:1.45rem 0 1rem}.tile-grid{display:grid;gap:1rem}.zone-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.scenario-grid,.option-grid,.question-route-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.picture-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.tile{text-align:left;border:1px solid var(--pip-blue-line);border-radius:1.5rem;padding:1rem;background:var(--pip-card);cursor:pointer;min-height:170px;box-shadow:0 10px 22px #0b28780f;transition:transform .16s ease,box-shadow .16s ease}.tile:disabled{cursor:not-allowed;opacity:.72;transform:none}.tile img{width:100%;height:135px;-o-object-fit:cover;object-fit:cover;-o-object-position:center;object-position:center;border-radius:1rem;border:1px solid var(--pip-blue-line);margin-bottom:.75rem;background:#fff}.picture-tile img{height:150px}.tile h3{margin:.45rem 0 .35rem}.tile p{color:var(--pip-muted);margin:0}.tile-status{display:inline-flex;width:-moz-fit-content;width:fit-content;border-radius:999px;background:var(--pip-blue-soft);color:var(--pip-navy);font-size:.75rem;font-weight:800;padding:.32rem .65rem;text-transform:uppercase;letter-spacing:.04em}.active-tile{border-color:#0b287873}.preview-tile{background:#f8f9fc}.viewer-page{margin-top:.25rem}.viewer-strip{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin:0 0 .75rem;padding:.55rem .75rem;border:1px solid var(--pip-blue-line);border-radius:999px;background:#ffffffc7;color:var(--pip-muted)}.viewer-strip strong{color:var(--pip-navy)}.viewer-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:1rem;align-items:start}.viewer-main{min-width:0}.image-stage{border:1px solid var(--pip-blue-line);background:#fff;border-radius:1.4rem;padding:.65rem;box-shadow:var(--pip-shadow)}.image-stage img{display:block;width:100%;height:auto;border-radius:1rem;background:#fff}.side-controls{position:sticky;top:5.25rem;border:1px solid var(--pip-blue-line);background:#ffffffeb;border-radius:1.35rem;padding:1rem;box-shadow:0 10px 25px #0b287814}.side-controls h2{font-size:1.25rem;margin-bottom:.75rem}.side-button-stack{display:grid;gap:.65rem}.side-button-stack button{width:100%}.learning-card{border:1px solid var(--pip-blue-line);background:#fff;border-radius:1.4rem;padding:clamp(1rem,2vw,1.4rem);box-shadow:var(--pip-shadow)}.card-label{display:inline-flex;width:-moz-fit-content;width:fit-content;border-radius:999px;background:var(--pip-blue-soft);color:var(--pip-navy);font-size:.82rem;font-weight:800;padding:.38rem .72rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.75rem}.lead-text{color:var(--pip-muted);font-size:1.12rem}.question-box,.support-box-readable,.final-answer,.unit-key-link{border:2px solid var(--pip-navy);border-radius:1.1rem;padding:1rem;margin-top:1rem;background:#fff}.question-box h2,.support-box-readable h2{margin-bottom:.55rem}.question-box p{font-size:clamp(1.18rem,2vw,1.6rem);margin:.25rem 0}.support-box-readable{background:var(--pip-blue-soft)}.support-box-readable p,.support-box-readable dd,.support-box-readable dt{font-size:1.08rem}.equation-support dl{display:grid;gap:.45rem;margin:0}.equation-support div{display:grid;grid-template-columns:170px minmax(0,1fr);gap:.75rem;align-items:baseline}.equation-support dt{font-weight:800;color:var(--pip-navy)}.equation-support dd{margin:0}.option-list{margin:.75rem 0 0;font-size:1.1rem;line-height:1.55}.three-column-answer{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin-top:1rem}.info-box{min-height:260px;border:2px solid var(--pip-navy);border-radius:1.1rem;padding:1rem;background:#fff}.info-box.green-box{border-color:var(--pip-green);background:var(--pip-green-soft)}.info-box h2{margin-bottom:.6rem}.info-box ul,.info-box ol{margin:0;padding-left:1.35rem}.info-box li{font-size:1rem;line-height:1.45;margin-bottom:.45rem}.info-box ol li::marker{font-weight:800;color:var(--pip-navy)}.final-answer{font-size:clamp(1.25rem,2vw,1.7rem);font-weight:850;color:var(--pip-navy)}.unit-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin-top:1rem}.unit-mini-card{border:2px solid var(--pip-navy);border-radius:1.1rem;padding:1rem;background:var(--pip-blue-soft);min-height:170px}.unit-mini-card:nth-child(2){border-color:var(--pip-orange);background:var(--pip-orange-soft)}.unit-mini-card:nth-child(3){border-color:var(--pip-green);background:var(--pip-green-soft)}.unit-mini-card p{font-size:1.08rem}.unit-key-link{display:grid;gap:.45rem}.unit-key-link strong{font-size:clamp(1.6rem,3vw,2.35rem);color:var(--pip-navy)}.unit-key-link span{font-size:1.15rem}.keyword-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1rem}.keyword-card{background:#fff;border:1px solid var(--pip-blue-line);border-radius:1.25rem;padding:1rem;box-shadow:0 8px 18px #0b28780f}.keyword-card h3{margin-bottom:.75rem;text-transform:capitalize}.keyword-card p{margin:.55rem 0;color:var(--pip-text)}.small-link{margin-top:.5rem}.question-route-tile:nth-child(1){border-left:6px solid var(--pip-navy)}.question-route-tile:nth-child(2){border-left:6px solid #5267b6}.question-route-tile:nth-child(3){border-left:6px solid var(--pip-orange)}.question-route-tile:nth-child(4){border-left:6px solid var(--pip-green)}.question-route-tile:nth-child(5){border-left:6px solid #6b2fa8}@media (max-width: 980px){.viewer-layout{grid-template-columns:1fr}.side-controls{position:static}.three-column-answer,.unit-card-grid{grid-template-columns:1fr}.info-box{min-height:auto}}@media (max-width: 760px){.top-nav,.hero-card{align-items:stretch;flex-direction:column}.top-links{justify-content:flex-start}.primary-action,.secondary-action,.support-action,.hero-actions button,.journey-start-row button,.utility-row button{width:100%}.equation-support div{grid-template-columns:1fr;gap:.1rem}}.answer-template h1{margin-bottom:.85rem}.answer-sections{display:grid;gap:1rem;margin-top:1rem}.single-column-answer{grid-template-columns:1fr}.written-answer-grid{grid-template-columns:minmax(0,1.15fr) minmax(0,.95fr) minmax(0,.9fr);align-items:stretch}.answer-section{border:2px solid var(--pip-navy);border-radius:1.1rem;padding:1rem;background:#fff;min-height:160px}.answer-section h2{font-size:clamp(1.25rem,2vw,1.65rem);margin-bottom:.65rem}.answer-section p,.answer-section li{font-size:clamp(1.03rem,1.45vw,1.18rem);line-height:1.48}.answer-section ul{margin:0;padding-left:1.3rem}.answer-section li{margin-bottom:.45rem}.answer-section-blue{background:var(--pip-blue-soft)}.answer-section-green{border-color:var(--pip-green);background:var(--pip-green-soft)}.answer-section-navy{background:#fff}.answer-statement{font-weight:700;color:var(--pip-text)}.calculation-grid .info-box h2,.answer-section h2{color:var(--pip-navy-dark)}.final-answer span{display:inline-block;margin-right:.4rem}@media (max-width: 980px){.written-answer-grid{grid-template-columns:1fr}.answer-section{min-height:auto}}.scenario-tile img{height:150px;-o-object-fit:contain;object-fit:contain;-o-object-position:center;object-position:center;padding:.25rem;background:#fff}.scenario-tile{display:flex;flex-direction:column}.scenario-tile h3{min-height:2rem}.concept-support-card h1{margin-bottom:.45rem}.concept-summary{border:2px solid var(--pip-navy);border-radius:1.1rem;padding:1rem;margin:1rem 0;background:var(--pip-blue-soft);color:var(--pip-navy);font-weight:750;font-size:1.12rem;line-height:1.45}.concept-section-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem;margin-top:1rem}.concept-section{border:1px solid var(--pip-blue-line);border-radius:1.1rem;background:#fff;padding:1rem}.concept-section h2{color:var(--pip-navy);font-size:1.22rem;margin-bottom:.45rem}.concept-section p{line-height:1.5;margin:0}.concept-key-terms{margin-top:1.25rem}
