:root{--board:#173f34;--board-2:#0e3028;--chalk:#f7f1dc;--paper:#f3ecd8;--ink:#18352e;--mustard:#d8aa3d;--muted:#9fb8ad;--line:rgba(247,241,220,.13);--shadow:0 22px 65px rgba(4,24,19,.28)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--board);color:var(--chalk);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.7}body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.18;background-image:radial-gradient(circle at 20% 30%,rgba(255,255,255,.16) 0 1px,transparent 1.5px),radial-gradient(circle at 73% 65%,rgba(255,255,255,.11) 0 1px,transparent 1.5px);background-size:29px 31px,37px 41px;mix-blend-mode:screen}.shell{width:min(1180px,calc(100% - 40px));margin:auto}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:16px;top:12px;z-index:9999;background:#fff;color:#111;padding:10px}.site-header{position:sticky;top:0;z-index:100;background:rgba(14,48,40,.93);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.nav-shell{height:78px;display:flex;align-items:center;gap:30px}.brand img{width:auto;height:48px}.primary-nav{margin-left:auto}.menu{list-style:none;display:flex;gap:25px;margin:0;padding:0}.menu a{font-weight:700;font-size:.91rem;position:relative}.menu a:after{content:"";position:absolute;left:0;right:100%;bottom:-7px;height:3px;background:var(--mustard);border-radius:10px;transition:.25s}.menu a:hover:after{right:0}.search-trigger{width:40px;height:40px;display:grid;place-items:center;border:1px dashed rgba(247,241,220,.45);border-radius:50%;font-size:1.45rem}.nav-toggle{display:none}.chalk-hero{padding:74px 0 64px;background:linear-gradient(180deg,var(--board),var(--board-2));position:relative;overflow:hidden}.chalk-hero:after{content:"compound interest = principal × time × patience";position:absolute;right:-45px;bottom:25px;transform:rotate(-6deg);font-family:"Segoe Print",cursive;font-size:18px;opacity:.12}.hero-grid{display:grid;grid-template-columns:.9fr 1.1fr;align-items:center;gap:65px}.class-stamp,.section-heading>span,.lesson-label,.search-classroom span,.answer-box>span,.key-checks>span,.desk-card>span{display:inline-block;text-transform:uppercase;letter-spacing:.17em;font-size:.72rem;font-weight:900;color:var(--mustard)}h1,h2,h3{font-family:"Segoe Print","Comic Sans MS",cursive;line-height:1.15;margin-top:0}.hero-copy h1{font-size:clamp(2.8rem,5vw,5.5rem);margin:16px 0 22px;letter-spacing:-.045em}.hero-copy h1:after,.section-heading h2:after{content:"";display:block;width:74%;height:6px;margin-top:13px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='320' height='8'%3E%3Cpath d='M2 5c80-5 150 4 230-1 35-2 60-2 86 1' fill='none' stroke='%23d8aa3d' stroke-width='4' stroke-linecap='round'/%3E%3C/svg%3E") center/100% 100% no-repeat}.hero-copy>p{font-size:1.09rem;color:#d5dfda;max-width:660px}.hero-actions{display:flex;align-items:center;gap:24px;margin-top:31px}.chalk-button{display:inline-flex;align-items:center;justify-content:center;background:var(--mustard);color:#172b25;padding:14px 22px;font-weight:900;clip-path:polygon(1% 7%,98% 0,100% 91%,3% 100%);transition:.2s}.chalk-button:hover{transform:translateY(-3px) rotate(-.5deg)}.text-link,.ink-link{font-weight:900;border-bottom:2px dashed currentColor}.lesson-points{display:flex;flex-wrap:wrap;gap:11px 20px;margin-top:28px;font-size:.85rem;color:#c9d8d1}.hero-visual{position:relative}.hero-visual:before{content:"";position:absolute;inset:-16px;border:2px dashed rgba(247,241,220,.28);transform:rotate(1deg);border-radius:34px}.hero-visual img{border-radius:28px;box-shadow:var(--shadow);position:relative}.trust-ruler{background:var(--mustard);color:#16372f;padding:16px 0;box-shadow:inset 0 3px rgba(255,255,255,.25),inset 0 -3px rgba(0,0,0,.12)}.ruler-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;font-size:.82rem;text-transform:uppercase;letter-spacing:.09em}.ruler-grid b{font-size:1.1rem;margin-right:5px}.syllabus{padding:95px 0}.section-heading{max-width:760px;margin-bottom:38px}.section-heading h2{font-size:clamp(2rem,4vw,3.45rem);margin:9px 0 13px}.section-heading p{color:#cbd8d2}.syllabus-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px}.syllabus-card{grid-column:span 4;min-height:270px;padding:28px;background:rgba(255,255,255,.035);border:1px solid rgba(247,241,220,.19);position:relative;overflow:hidden;transition:.25s;clip-path:polygon(0 2%,98% 0,100% 96%,2% 100%)}.syllabus-card:nth-child(4),.syllabus-card:nth-child(5){grid-column:span 6;min-height:235px}.syllabus-card:hover{transform:translateY(-7px) rotate(-.4deg);background:rgba(255,255,255,.07);box-shadow:0 18px 40px rgba(3,20,16,.25)}.desk-number{position:absolute;right:20px;top:8px;font:700 5rem/1 "Segoe Print",cursive;color:rgba(247,241,220,.06)}.desk-icon{font-size:2.2rem}.syllabus-card h3{font-size:1.85rem;margin:22px 0 10px}.syllabus-card p{color:#bed0c7;max-width:320px}.syllabus-card em{font-style:normal;font-weight:900;color:var(--mustard)}.notebook-band{background:var(--paper);color:var(--ink);padding:95px 0;position:relative}.notebook-band:before,.lesson-paper:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(to bottom,transparent 0,transparent 37px,rgba(65,105,119,.14) 38px,transparent 39px);pointer-events:none}.notebook-band:after{content:"";position:absolute;top:0;left:0;right:0;height:17px;background:linear-gradient(135deg,var(--board) 8px,transparent 0) 0 0/17px 17px repeat-x}.dark-ink p{color:#536b62}.resource-layout{display:grid;grid-template-columns:1.16fr .84fr;gap:30px;position:relative}.featured-sheet{background:#fffaf0;box-shadow:8px 9px 0 rgba(24,53,46,.15),var(--shadow);transform:rotate(-.4deg);position:relative}.featured-sheet:before{content:"";position:absolute;left:-8px;top:28px;bottom:28px;width:15px;background:radial-gradient(circle,#d8aa3d 0 4px,transparent 5px) center top/15px 32px repeat-y}.sheet-image img{width:100%;aspect-ratio:16/9;object-fit:cover}.sheet-copy{padding:31px}.sheet-copy h3{font-size:2rem;margin:8px 0 12px}.sheet-copy p{color:#52655e}.lesson-stack{display:grid;gap:13px}.lesson-card{display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center;background:#fffaf0;padding:21px 22px;box-shadow:4px 5px 0 rgba(24,53,46,.12);position:relative;transition:.2s}.lesson-card:nth-child(even){transform:rotate(.4deg)}.lesson-card:hover{transform:translateX(5px) rotate(0)}.pin{width:13px;height:13px;border:3px solid var(--ink);border-radius:50%;box-shadow:0 0 0 4px rgba(216,170,61,.45)}.lesson-card h3{font-family:inherit;font-size:1.05rem;margin:2px 0 5px;line-height:1.35}.lesson-card p{font-size:.84rem;color:#65766f;margin:0}.card-arrow{font-size:1.4rem;color:var(--mustard);font-weight:900}.older-wrap{text-align:center;margin-top:45px}.chalk-button.ink{background:var(--ink);color:var(--chalk)}.decision-lab{padding:85px 0}.lab-board{border:2px dashed rgba(247,241,220,.28);padding:42px;display:grid;grid-template-columns:.8fr 1.2fr;gap:55px;align-items:center;box-shadow:inset 0 0 60px rgba(0,0,0,.12)}.lab-board h2{font-size:2.6rem;margin:12px 0}.lab-board ol{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:18px}.lab-board li{padding:18px;border-left:4px solid var(--mustard);background:rgba(255,255,255,.035)}.lab-board li b{display:block;font:700 1.25rem "Segoe Print",cursive}.lab-board li span{font-size:.85rem;color:#c4d4cc}.search-classroom{background:#0c2b24;padding:65px 0;border-top:1px solid var(--line)}.search-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}.search-grid h2{font-size:2.25rem;margin:10px 0}.search-form{display:flex;background:var(--paper);padding:9px;transform:rotate(-.5deg);box-shadow:8px 8px 0 rgba(0,0,0,.25)}.search-field{flex:1;border:0;background:transparent;padding:15px;color:var(--ink);font-size:1rem;min-width:0}.search-submit{border:0;background:var(--mustard);color:var(--ink);font-weight:900;padding:0 23px}.site-footer{padding:64px 0 20px;background:#09241e;border-top:1px dashed rgba(247,241,220,.25)}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:50px}.footer-grid img{height:48px;width:auto;margin-bottom:16px}.footer-grid h2{font-size:1.2rem}.footer-grid a{display:block;color:#c4d4cd;margin:8px 0}.footer-bottom{border-top:1px solid var(--line);margin-top:40px;padding-top:20px;display:flex;justify-content:space-between;color:#91aa9e;font-size:.8rem}.lesson-hero{padding:70px 0 60px;background:linear-gradient(180deg,#12372e,var(--board))}.lesson-hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:55px;align-items:center}.chalk-crumb{display:flex;gap:8px;color:#afc4ba;font-size:.8rem;margin-bottom:26px}.lesson-title-block h1{font-size:clamp(2.8rem,5vw,5rem);margin:14px 0 20px}.lesson-deck{font-size:1.06rem;color:#cfddd6;max-width:700px}.lesson-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:25px}.lesson-meta span{border:1px dashed rgba(247,241,220,.35);padding:7px 10px;font-size:.75rem}.lesson-cover{background:var(--paper);padding:15px 15px 44px;transform:rotate(1.3deg);box-shadow:var(--shadow);position:relative}.lesson-cover img{aspect-ratio:4/3;object-fit:cover}.paper-clip{position:absolute;right:42px;top:-20px;width:29px;height:76px;border:5px solid var(--mustard);border-radius:18px;transform:rotate(8deg)}.reading-progress{position:sticky;top:78px;z-index:90;height:4px;background:rgba(255,255,255,.08)}.reading-progress span{display:block;width:0;height:100%;background:var(--mustard)}.lesson-workspace{display:grid;grid-template-columns:190px minmax(0,720px) 250px;gap:28px;align-items:start;padding:70px 0}.lesson-margin,.teacher-desk{position:sticky;top:112px}.margin-card,.margin-note,.desk-card{border:1px dashed rgba(247,241,220,.3);padding:20px;background:rgba(8,37,30,.44)}.margin-card>span{font-weight:900;color:var(--mustard);font-size:.75rem;text-transform:uppercase;letter-spacing:.14em}.margin-card a{display:block;padding:10px 0;border-bottom:1px solid var(--line);font-size:.86rem}.margin-note{margin-top:18px;font-size:.76rem;color:#baccc3}.lesson-paper{background:var(--paper);color:var(--ink);padding:46px 52px;box-shadow:9px 11px 0 rgba(0,0,0,.18);position:relative;clip-path:polygon(0 .4%,99% 0,100% 99%,1% 100%)}.lesson-paper>*{position:relative}.answer-box{background:#fffaf0;border-left:6px solid var(--mustard);padding:23px;margin-bottom:35px;box-shadow:4px 5px 0 rgba(24,53,46,.1)}.answer-box p{margin:8px 0 0;font-size:1.02rem;font-weight:650}.entry-content{font-size:1.02rem}.entry-content h2{font-size:2.05rem;margin:48px 0 16px}.entry-content h3{font-size:1.5rem;margin:35px 0 12px}.entry-content a{color:#8d6510;font-weight:800;border-bottom:1px dashed}.entry-content blockquote{margin:30px 0;padding:22px 28px;background:#fffaf0;border-left:6px solid var(--ink);font-family:"Segoe Print",cursive}.entry-content table{width:100%;border-collapse:collapse;background:#fffaf0}.entry-content td,.entry-content th{border:1px solid rgba(24,53,46,.2);padding:12px}.entry-content img{box-shadow:6px 7px 0 rgba(24,53,46,.14)}.investrova-internal-links{background:#fff8df;padding:20px 23px;margin:28px 0;border:2px dashed rgba(24,53,46,.35)}.investrova-internal-links:before{content:"Related classroom notes";display:block;font-weight:900;color:#8d6510;margin-bottom:8px}.investrova-internal-links a{display:block;margin:7px 0}.key-checks{margin-top:50px;background:var(--ink);color:var(--chalk);padding:28px;clip-path:polygon(0 3%,100% 0,98% 100%,2% 97%)}.key-checks h2{font-size:1.65rem;margin:9px 0}.key-checks ul{margin-bottom:0}.desk-card h2{font-size:1.55rem;margin:10px 0}.desk-card p,.desk-card li{font-size:.82rem;color:#c3d3cb}.desk-card hr{border:0;border-top:1px dashed rgba(247,241,220,.3)}.related-classroom{background:var(--paper);color:var(--ink);padding:85px 0}.related-classroom .section-heading p{color:#50685f}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}.related-sheet{background:#fffaf0;padding:14px 14px 26px;box-shadow:7px 8px 0 rgba(24,53,46,.15);position:relative}.related-sheet:nth-child(2){transform:rotate(.7deg)}.related-sheet img{aspect-ratio:16/10;object-fit:cover}.related-sheet>span{display:block;color:#a57718;font-weight:900;text-transform:uppercase;letter-spacing:.12em;font-size:.68rem;margin-top:18px}.related-sheet h3{font-size:1.35rem;margin:8px 0}.related-sheet p{font-size:.86rem;color:#5b6e67}.related-sheet>a{font-weight:900;border-bottom:2px dashed var(--mustard)}.archive-shell,.page-shell,.search-shell{padding:70px 0;min-height:60vh}.archive-grid,.posts-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.page-content{background:var(--paper);color:var(--ink);padding:45px;max-width:850px;margin:auto}.error-404{text-align:center;padding:120px 20px}.error-404 h1{font-size:5rem}@media(max-width:1050px){.lesson-workspace{grid-template-columns:160px minmax(0,1fr)}.teacher-desk{display:none}.hero-grid,.lesson-hero-grid{gap:35px}.hero-copy h1{font-size:3.7rem}}@media(max-width:820px){.nav-toggle{display:block;margin-left:auto;background:transparent;color:var(--chalk);border:1px dashed rgba(247,241,220,.4);padding:8px 12px}.primary-nav{display:none;position:absolute;top:77px;left:0;right:0;background:#0d3028;padding:20px}.primary-nav.open{display:block}.menu{display:grid;gap:12px}.search-trigger{display:none}.hero-grid,.lesson-hero-grid,.resource-layout,.lab-board,.search-grid{grid-template-columns:1fr}.hero-copy h1{font-size:3.25rem}.hero-visual{margin-top:15px}.syllabus-card,.syllabus-card:nth-child(4),.syllabus-card:nth-child(5){grid-column:span 6}.ruler-grid{grid-template-columns:1fr 1fr}.lesson-workspace{grid-template-columns:1fr;padding-top:35px}.lesson-margin{position:static;display:grid;grid-template-columns:1fr 1fr;gap:14px}.margin-note{margin-top:0}.related-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}@media(max-width:560px){.shell{width:min(100% - 24px,1180px)}.nav-shell{height:68px}.brand img{height:39px}.chalk-hero{padding-top:45px}.hero-copy h1,.lesson-title-block h1{font-size:2.55rem}.hero-actions{align-items:flex-start;flex-direction:column}.lesson-points{display:grid}.syllabus{padding:65px 0}.syllabus-card,.syllabus-card:nth-child(4),.syllabus-card:nth-child(5){grid-column:1/-1;min-height:auto}.notebook-band,.related-classroom{padding:70px 0}.sheet-copy{padding:23px}.lab-board{padding:25px}.lab-board ol{grid-template-columns:1fr}.lesson-hero{padding:42px 0}.lesson-hero-grid{display:flex;flex-direction:column}.lesson-cover{order:-1}.lesson-meta{gap:6px}.lesson-paper{padding:32px 22px;clip-path:none}.lesson-margin{display:block}.margin-note{margin-top:12px}.related-grid,.archive-grid,.posts-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.footer-bottom{display:grid;gap:8px}.ruler-grid{font-size:.7rem}.section-heading h2{font-size:2.15rem}}
.context-links{background:#fff8df;padding:20px 23px;margin:30px 0;border:2px dashed rgba(24,53,46,.38);box-shadow:4px 5px 0 rgba(24,53,46,.09)}.context-links strong{display:block;color:#8d6510;margin-bottom:9px;font-family:"Segoe Print",cursive}.context-links span{display:flex;flex-wrap:wrap;gap:7px 10px}.context-links a{font-weight:850}.context-links i{font-style:normal;color:var(--mustard)}

/* Search form stability patch */
.search-form .search-label{display:flex;flex:1;min-width:0;margin:0}
.search-form .search-field{width:100%;outline:none;border-radius:0;-webkit-appearance:none}
.search-form .search-field:focus{box-shadow:inset 0 -3px 0 var(--mustard)}
.search-form .search-submit{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:52px;border:0;background:var(--mustard);color:var(--ink);font-weight:900;padding:0 23px;cursor:pointer;white-space:nowrap;clip-path:polygon(2% 5%,98% 0,100% 94%,0 100%);transition:transform .2s,filter .2s}
.search-form .search-submit:hover,.search-form .search-submit:focus-visible{transform:translateY(-2px);filter:brightness(1.05)}
.search-form .search-submit:focus-visible{outline:3px solid var(--chalk);outline-offset:3px}
.screen-reader-text{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:560px){.search-form{align-items:stretch}.search-form .search-submit{padding:0 16px}.search-form .search-submit span:first-child{display:none}}

/* Targeted search interaction fixes — v1.2.1 */
.search-trigger{appearance:none;-webkit-appearance:none;background:transparent;color:var(--chalk);padding:0;cursor:pointer;transition:background .2s,border-color .2s,transform .2s}
.search-trigger:hover,.search-trigger:focus-visible,.search-trigger[aria-expanded="true"]{background:var(--mustard);color:var(--ink);border-color:var(--mustard);transform:rotate(-3deg)}
.search-trigger:focus-visible{outline:3px solid rgba(247,241,220,.75);outline-offset:3px}
.header-search-panel{position:absolute;top:100%;left:0;right:0;background:#0b2a23;border-bottom:1px dashed rgba(247,241,220,.32);box-shadow:0 22px 45px rgba(2,18,14,.36)}
.header-search-panel[hidden]{display:none}
.header-search-inner{position:relative;display:grid;grid-template-columns:auto minmax(280px,680px) auto;align-items:center;justify-content:center;gap:22px;padding:20px 0}
.header-search-label{font-family:"Segoe Print","Comic Sans MS",cursive;font-weight:700;color:var(--chalk);white-space:nowrap}
.header-search-panel .search-form{width:100%;transform:none;box-shadow:5px 5px 0 rgba(0,0,0,.22)}
.header-search-close{width:38px;height:38px;border:1px dashed rgba(247,241,220,.48);border-radius:50%;background:transparent;color:var(--chalk);font-size:1.55rem;line-height:1;cursor:pointer}
.header-search-close:hover,.header-search-close:focus-visible{background:var(--mustard);color:var(--ink);border-color:var(--mustard)}
.search-classroom .search-form{align-items:stretch;padding:8px;border:1px solid rgba(24,53,46,.15)}
.search-classroom .search-label{min-height:56px}
.search-classroom .search-field{padding:14px 17px}
.search-classroom .search-submit{min-width:142px;min-height:56px;padding:0 22px;clip-path:none;border-radius:2px;box-shadow:inset 0 -3px 0 rgba(24,53,46,.18)}
.search-classroom .search-submit span:last-child{font-size:1.15rem;transition:transform .2s}
.search-classroom .search-submit:hover span:last-child{transform:translateX(3px)}
@media(max-width:820px){.search-trigger{display:grid;margin-left:0}.header-search-inner{grid-template-columns:1fr auto;gap:12px;padding:15px 0}.header-search-label{grid-column:1/-1;font-size:.88rem}.header-search-panel .search-form{min-width:0}}
@media(max-width:560px){.header-search-inner{display:grid}.header-search-panel .search-form{grid-column:1/-1;order:3}.header-search-close{position:absolute;right:0;top:13px}.search-classroom .search-form{display:grid;grid-template-columns:minmax(0,1fr) 54px;padding:7px}.search-classroom .search-submit{min-width:54px;width:54px;padding:0}.search-classroom .search-submit span:first-child{display:none}.search-classroom .search-submit span:last-child{font-size:1.3rem}}