:root{--ink:#14213d;--muted:#586781;--navy:#122e51;--blue:#285edb;--blue-dark:#1645b1;--mint:#0f947f;--orange:#e98228;--sky:#eaf4ff;--pale:#f6f8fc;--white:#fff;--border:#dce5f2;--shadow:0 20px 55px rgba(26,53,91,.09);--radius:24px;--wrap:1140px}
*[hidden]{display:none!important}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:#fff;color:var(--ink);font-family:"Avenir Next",Avenir,"Segoe UI",Arial,sans-serif;font-size:16px;line-height:1.6}body.menu-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{max-width:100%;height:auto}svg{max-width:100%}p{margin:0 0 1rem}h1,h2,h3,h4{line-height:1.13;letter-spacing:-.035em;margin:0 0 1rem}h1{font-size:clamp(2.75rem,5.2vw,5.4rem)}h2{font-size:clamp(2rem,3.4vw,3.15rem)}h3{font-size:1.25rem}small{font-size:.85rem}.wrap{width:min(var(--wrap),calc(100% - 48px));margin-inline:auto}.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}:focus-visible{outline:3px solid #f69e45;outline-offset:4px}.skip-link{position:absolute;top:-60px;left:1rem;background:#fff;padding:.7rem 1rem;z-index:999;box-shadow:var(--shadow)}.skip-link:focus{top:12px}
.announcement{background:#113c71;color:#fff;font-size:.83rem;text-align:center;letter-spacing:.01em;padding:8px 18px}.announcement strong{color:#c5f8e1}.site-header{position:sticky;top:0;z-index:99;background:rgba(255,255,255,.97);border-bottom:1px solid rgba(220,229,242,.8);backdrop-filter:blur(14px)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:86px}.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}.brand img{width:58px;height:58px;object-fit:contain}.brand-name{display:flex;flex-direction:column;line-height:1.06}.brand-name b{font-size:1.16rem;letter-spacing:.015em;font-weight:900;color:#15315c}.brand-name small{font-size:.68rem;letter-spacing:.25em;font-weight:900;margin-top:4px;color:#23816e}.site-nav{display:flex;align-items:center;gap:26px;font-weight:700;font-size:.9rem}.site-nav>a:not(.button){color:#314361}.site-nav>a:hover,.footer-links a:hover,.inline-link:hover{color:var(--blue)}.menu-button{display:none;background:#edf4ff;border:1px solid var(--border);color:#244a83;border-radius:14px;font-weight:800;padding:11px 14px}
.button{display:inline-flex;justify-content:center;align-items:center;gap:9px;border:1px solid transparent;border-radius:13px;padding:14px 21px;background:var(--blue);color:white;font-size:.92rem;font-weight:800;line-height:1.25;min-height:48px;box-shadow:0 10px 26px rgba(40,94,219,.17);transition:transform .15s,box-shadow .15s,background .15s}.button:hover{transform:translateY(-2px);background:var(--blue-dark);box-shadow:0 15px 28px rgba(40,94,219,.2)}.button-sm{padding:11px 16px;min-height:42px}.button-light{background:#fff;color:#234b9c;border-color:#d4e1fa;box-shadow:none}.button-light:hover{background:#eef4ff}.button-mint{background:#138974;box-shadow:0 10px 25px rgba(19,137,116,.12)}.button-mint:hover{background:#096b5b}.button-outline{background:transparent;border-color:#bdd1ec;color:#204e91;box-shadow:none}.button-outline:hover{background:#eaf2ff}.text-link,.inline-link{color:var(--blue);font-weight:800;text-decoration-thickness:1.5px;text-underline-offset:3px}.text-link:hover{text-decoration:underline}
.section{padding:86px 0}.section-soft{background:var(--pale)}.section-sky{background:#ecf5ff}.section-mint{background:#e9f8f3}.section-intro{max-width:720px;margin-bottom:36px}.section-kicker,.eyebrow{text-transform:uppercase;letter-spacing:.13em;font-weight:900;color:#157b70;font-size:.76rem;margin:0 0 14px}.section-intro p:not(.section-kicker),.lead{font-size:1.13rem;color:var(--muted);line-height:1.76}.section-intro.centered{text-align:center;margin:0 auto 40px}.section-intro.centered p{margin-left:auto;margin-right:auto}.pill{display:inline-flex;align-items:center;gap:7px;border:1px solid #c7e4ef;border-radius:100px;background:#effaf9;color:#18756b;font-size:.79rem;font-weight:900;padding:7px 12px;letter-spacing:.015em}.pill-blue{background:#edf4ff;border-color:#d3e1fc;color:#315aa8}.pill-orange{background:#fff4e8;border-color:#f9d8b3;color:#a95817}
.hero{position:relative;overflow:hidden;padding:75px 0 85px;background:radial-gradient(circle at 92% 0%,#d7f3ee 0,transparent 36%),radial-gradient(circle at 0% 77%,#eff0ff 0,transparent 30%),linear-gradient(120deg,#f8fbff,#eef6ff)}.hero::after{content:"";position:absolute;width:230px;height:230px;border:40px solid rgba(33,110,214,.035);border-radius:50%;right:-135px;bottom:-125px;pointer-events:none}.hero-grid{display:grid;grid-template-columns:minmax(0,1.03fr) minmax(0,.97fr);align-items:center;gap:60px}.hero h1{max-width:690px;margin:23px 0}.hero h1 em{font-style:normal;color:var(--blue)}.hero p.hero-description{font-size:1.13rem;line-height:1.8;color:#4f6078;max-width:535px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:29px 0 27px}.trust-line{display:flex;flex-wrap:wrap;gap:13px 18px;color:#4a607c;font-size:.85rem;font-weight:750}.trust-line span{display:inline-flex;align-items:center;gap:6px}.trust-line span:before{content:"✓";display:grid;place-items:center;width:19px;height:19px;background:#def5ec;color:#137a67;border-radius:50%;font-size:.75rem}
.hero-lab-wrap{position:relative}.orbit{position:absolute;border-radius:50%;pointer-events:none}.orbit-one{width:90px;height:90px;background:#ffcd8d;top:-25px;right:-25px;opacity:.75}.orbit-two{width:56px;height:56px;background:#7edac1;bottom:-28px;left:-28px;opacity:.5}.lab-window{position:relative;border:1px solid #dfeaf6;border-radius:27px;background:#fff;padding:26px;box-shadow:0 38px 78px rgba(25,59,105,.16)}.lab-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:19px}.lab-dots{display:flex;gap:6px}.lab-dots i{display:block;width:10px;height:10px;background:#d6e4f4;border-radius:50%}.lab-dots i:first-child{background:#f3a35e}.lab-dots i:nth-child(2){background:#6dd2b9}.lab-dots i:nth-child(3){background:#84abe6}.lab-tag{border-radius:100px;background:#edf5ff;color:#3860a2;padding:6px 11px;font-size:.76rem;font-weight:800}.lab-title{font-size:1.43rem;letter-spacing:-.02em;margin:0}.lab-subtitle{color:#65758e;font-size:.89rem;margin:4px 0 12px}.equation-stage{background:linear-gradient(135deg,#f1f7ff,#ecfbf7);border:1px solid #deebf5;border-radius:21px;padding:26px 15px;text-align:center;margin:18px 0 20px}.equation-display{font-size:clamp(2rem,3vw,2.65rem);font-weight:900;letter-spacing:.01em;line-height:1.3;color:#17365f}.equation-display .variable{color:#2e66cf}.equation-caption{font-size:.8rem;color:#64748b;margin:9px 0 0}.balance-line{display:flex;justify-content:center;gap:5px;margin-top:18px}.balance-line span{display:block;background:#5b8ce1;height:8px;border-radius:8px;width:58px}.balance-line span:nth-child(2){background:#ffa95a;width:9px}.balance-line span:nth-child(3){background:#61b7a8}.lab-question{font-weight:850;font-size:.92rem;color:#283e60;margin-bottom:10px}.lab-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.lab-choice{background:#fff;color:#244d7c;border:1.5px solid #b8cce6;border-radius:12px;padding:12px 8px;min-height:52px;font-weight:850;text-align:center;transition:.15s}.lab-choice:hover:not(:disabled){border-color:#3768d0;background:#f0f6ff}.lab-choice:disabled{opacity:.6;cursor:default}.lab-choice.selected{border-color:#219e81;background:#e7f8f0;color:#126a59;opacity:1}.lab-response{min-height:43px;border-radius:10px;padding:11px 12px;font-size:.85rem;font-weight:650;background:#f4f7fc;color:#495f79;margin-top:13px}.lab-response.success{background:#e6f7ed;color:#136c50}.lab-response.try-again{background:#fff4e8;color:#805120}.lab-next{margin-top:12px;display:none;width:100%}.lab-next.is-visible{display:flex}.lab-foot{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:16px;font-size:.75rem;color:#667990}.lab-foot a{color:#315fd0;font-weight:850}.tiny-caps{font-size:.74rem;text-transform:uppercase;letter-spacing:.09em;font-weight:900;color:#4c6b8a}
.stats-bar{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:24px 34px;border:1px solid var(--border);border-radius:24px;background:#fff;box-shadow:var(--shadow);margin-top:-32px;z-index:2}.stat{display:flex;gap:13px;align-items:center}.stat-icon{width:45px;height:45px;flex:none;display:grid;place-items:center;border-radius:13px;background:#e6f0ff;color:#2957bd;font-size:1.2rem;font-weight:950}.stat:nth-child(2) .stat-icon{background:#dcf8f0;color:#0f947f}.stat:nth-child(3) .stat-icon{background:#fff0dd;color:#d67c2a}.stat strong{display:block;font-size:.96rem}.stat small{display:block;color:var(--muted);line-height:1.45}
.path-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.path-card,.feature-card,.step-card,.profile-card{border:1px solid var(--border);background:#fff;border-radius:22px;padding:26px;box-shadow:0 10px 30px rgba(21,45,85,.04)}.path-card{position:relative;overflow:hidden;min-height:265px;display:flex;flex-direction:column}.path-card:before{position:absolute;content:"";left:0;right:0;top:0;height:5px;background:var(--card-accent,#315ed5)}.path-card:nth-child(2){--card-accent:#159681}.path-card:nth-child(3){--card-accent:#e8963e}.path-card:nth-child(4){--card-accent:#7f6ed0}.path-card .card-illustration{width:60px;height:60px;border-radius:17px;background:#edf4ff;display:grid;place-items:center;color:#285dcc;font-size:1.6rem;font-weight:900;margin-bottom:22px}.path-card:nth-child(2) .card-illustration{background:#e7f8f1;color:#18876e}.path-card:nth-child(3) .card-illustration{background:#fff1df;color:#c67624}.path-card:nth-child(4) .card-illustration{background:#f1edff;color:#7461c1}.path-card h3{font-size:1.25rem;margin-bottom:9px}.path-card p{font-size:.9rem;color:var(--muted);flex-grow:1}.path-card a{font-weight:900;color:#2c5ccb;font-size:.87rem}.path-card a:hover{text-decoration:underline}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature-card{min-height:245px}.feature-icon{width:53px;height:53px;background:#e9f2ff;border-radius:16px;display:grid;place-items:center;font-weight:950;color:#2a62b9;font-size:1.3rem;margin-bottom:20px}.feature-card:nth-child(2) .feature-icon{background:#e4f8f0;color:#148b75}.feature-card:nth-child(3) .feature-icon{background:#fff0dd;color:#ae701d}.feature-card p{color:var(--muted);font-size:.95rem}
.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:65px}.split-copy p:not(.section-kicker){color:var(--muted);font-size:1.03rem;line-height:1.78}.highlights{padding:0;margin:24px 0;list-style:none}.highlights li{position:relative;padding:7px 0 7px 28px;color:#344963;font-weight:650}.highlights li:before{content:"✓";position:absolute;left:0;color:#14876f;font-weight:950}.picture-frame{position:relative;padding:18px;border-radius:29px;background:linear-gradient(140deg,#d6edff,#d5f9ef);box-shadow:var(--shadow)}.picture-frame img{display:block;width:100%;object-fit:cover;aspect-ratio:1/1;border-radius:18px}.portrait-note{position:absolute;bottom:3px;right:-12px;background:#fff;border:1px solid #dce7f4;border-radius:15px;box-shadow:0 10px 35px rgba(20,45,72,.1);padding:13px 17px;max-width:235px}.portrait-note strong{display:block;color:#193958;font-size:.87rem}.portrait-note small{color:#58738f}.info-tile{background:#fff;border:1px solid #d6e4f1;border-radius:21px;padding:26px}.info-tile p{color:var(--muted)}.info-tile .mini-number{font-size:2rem;font-weight:900;color:#3261b7}.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.step-card .step-no{display:inline-grid;place-items:center;width:46px;height:46px;background:#e5f4ff;color:#245bbc;border-radius:50%;font-weight:900;margin-bottom:17px}.step-card p{color:var(--muted)}
.cta-band{background:linear-gradient(110deg,#173e78,#2459ab 52%,#147e8b);color:#fff;border-radius:28px;padding:51px 56px;display:flex;align-items:center;justify-content:space-between;gap:35px;overflow:hidden;position:relative}.cta-band:after{content:"";position:absolute;right:18%;bottom:-95px;width:210px;height:210px;border:33px solid rgba(255,255,255,.08);border-radius:50%}.cta-band p{color:#dcecfb;max-width:550px}.cta-band h2{font-size:clamp(1.75rem,3.4vw,2.7rem)}.cta-band .button{z-index:1;flex:none}.cta-band .section-kicker{color:#9ff2db}
.site-footer{background:#112b4b;color:#e4edf8;padding:59px 0 25px}.footer-grid{display:grid;grid-template-columns:1.55fr 1fr 1fr;gap:36px}.site-footer .brand-name b{color:#fff}.site-footer .brand-name small{color:#a2e5d1}.site-footer .brand img{width:57px;height:57px}.site-footer p{color:#b9ccdf;max-width:340px;margin-top:18px;font-size:.9rem}.footer-links{display:flex;flex-direction:column;align-items:flex-start;gap:11px;font-size:.91rem}.footer-links strong{margin-bottom:5px;color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.13);margin-top:38px;padding-top:22px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;color:#a9bed4;font-size:.8rem}
.page-hero{padding:70px 0 73px;background:linear-gradient(125deg,#eaf4ff,#f8fbff 55%,#e7f8f0)}.page-hero .wrap{max-width:var(--wrap)}.page-hero h1{max-width:890px;margin:15px 0 18px;font-size:clamp(2.5rem,4.6vw,4.35rem)}.page-hero .lead{max-width:750px}.breadcrumb{color:#4e6987;font-size:.82rem;font-weight:750}.breadcrumb a{color:#285dcc}.card-grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.content-card{background:white;border:1px solid var(--border);border-radius:23px;padding:31px}.content-card p{color:var(--muted)}.content-card h3{font-size:1.32rem}.content-card .pill{margin-bottom:18px}.subhead{font-size:clamp(1.6rem,2.6vw,2.3rem)}.accent-line{height:4px;background:linear-gradient(to right,#2c66d2,#15ac84,#ffc06a);width:95px;border-radius:9px;margin:18px 0 21px}.resource-list{display:grid;gap:13px}.resource-link{display:flex;align-items:center;gap:14px;border-radius:15px;padding:17px 19px;background:#f7faff;border:1px solid #e0eaf7}.resource-link:hover{border-color:#9db6e4;background:#f0f6ff}.resource-link strong{display:block}.resource-link small{color:#61738c}.resource-link .link-arrow{margin-left:auto;color:#3764bf;font-weight:900}
.lab-section{scroll-margin-top:112px}.lab-panel{background:#fff;border:1px solid #dbe6f1;box-shadow:var(--shadow);border-radius:25px;padding:33px}.lab-panel .lab-window{box-shadow:none;max-width:475px;margin-inline:auto}.lab-panel>p{color:var(--muted)}.lab-panel>.pill{margin-bottom:18px}.try-input{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.try-input input{flex:1;min-width:120px;border:1.5px solid #c1d2e7;border-radius:12px;padding:12px 15px;max-width:205px;outline-offset:4px}.demo-feedback{min-height:52px;padding:12px 15px;border:1px solid #d5e4f1;background:#f4f9ff;border-radius:12px;color:#34516d;font-weight:700}.demo-feedback.success{background:#e5f7ef;color:#12664f;border-color:#aee7cc}.demo-feedback.try-again{background:#fff5e8;color:#86501b;border-color:#efd2a3}.working{display:flex;gap:11px;flex-wrap:wrap;align-items:center;margin:18px 0;font-weight:850}.working .math-chip{background:#edf4ff;color:#2e5596;padding:10px 13px;border-radius:12px}.working .math-chip.emphasize{background:#dcf7ee;color:#146f5a}.slide-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px}.range-control{display:grid;gap:4px;font-weight:800}.range-control input{width:100%;accent-color:#2e63d3}.range-control output{color:#285dcc;font-weight:900}.graph-frame{border:1px solid var(--border);border-radius:20px;padding:18px;background:linear-gradient(135deg,#f9fcff,#edf7ff);margin:22px 0}.graph-frame svg{width:100%;height:auto;max-height:330px;display:block}.formula{display:inline-flex;align-items:center;gap:8px;color:#2356a8;background:#eff5ff;border:1px solid #d4e2f4;border-radius:11px;padding:10px 15px;font-size:1.15rem;font-weight:850}.answer-buttons{display:grid;gap:10px;margin:20px 0}.answer-option{text-align:left;border:1.5px solid #bacde6;border-radius:13px;padding:13px 16px;background:#fff;color:#233f66;font-weight:800}.answer-option:hover{background:#eff5ff;border-color:#7395dc}.answer-option:disabled{cursor:default;opacity:.72}.answer-option.correct{border-color:#289b79;background:#e7f8f1;color:#126d55;opacity:1}.answer-option.incorrect{border-color:#edb86c;background:#fff5e5;color:#885319;opacity:1}.tip{border-left:4px solid #3b8fc6;background:#eef7ff;padding:14px 19px;border-radius:0 12px 12px 0;color:#405773;font-size:.89rem}.learn-index{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 31px}.learn-index a{border:1px solid #d2e1f3;border-radius:12px;padding:9px 16px;color:#2e5b9f;background:#f5f9ff;font-weight:800;font-size:.87rem}.learn-index a:hover{background:#e7f1ff}.grid-label{font-size:.8rem;font-weight:800;color:#5a6d84}
.table-responsive{overflow-x:auto}.standards-table{width:100%;border-collapse:collapse;font-size:.91rem}.standards-table th,.standards-table td{padding:17px;border-bottom:1px solid #dfe8f4;text-align:left;vertical-align:top}.standards-table th{background:#f1f7ff;color:#2c4870}.standards-table td:last-child{color:#57677f}.math-inline{white-space:nowrap;color:#174f99;font-weight:900}.footer-note{font-size:.8rem;color:#60738d}.two-col-info{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
@media(max-width:1020px){.site-nav{gap:17px}.hero-grid{gap:30px}.path-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.split{gap:40px}}
@media(max-width:760px){.wrap{width:min(var(--wrap),calc(100% - 34px))}.announcement{font-size:.76rem}.header-inner{min-height:76px}.brand img{width:51px;height:51px}.brand-name b{font-size:1.08rem}.brand-name small{font-size:.63rem}.menu-button{display:inline-flex}.site-nav{position:absolute;left:0;right:0;top:100%;display:none;flex-direction:column;align-items:stretch;background:#fff;border-bottom:1px solid #d9e7f6;box-shadow:0 20px 30px rgba(32,53,80,.1);padding:19px 25px 25px;gap:0}.site-nav.is-open{display:flex}.site-nav>a{padding:13px 5px}.site-nav .button{margin-top:9px}.hero{padding:53px 0 72px}.hero-grid,.split{grid-template-columns:1fr}.hero h1{font-size:clamp(2.65rem,9vw,4rem)}.hero-lab-wrap{max-width:540px;width:100%;margin:18px auto 0}.stats-bar{grid-template-columns:1fr;gap:13px}.stat{padding:3px 0}.feature-grid,.step-grid{grid-template-columns:1fr}.section{padding:65px 0}.cta-band{padding:33px 26px;flex-direction:column;align-items:flex-start}.footer-grid{grid-template-columns:1fr 1fr;gap:27px}.footer-grid>div:first-child{grid-column:1/-1}.page-hero{padding:53px 0}.card-grid-2,.two-col-info{grid-template-columns:1fr}.picture-frame{max-width:530px;margin:0 auto}}
@media(max-width:470px){.lab-window{padding:19px}.lab-panel{padding:19px}.lab-options{gap:9px}.lab-choice{font-size:.88rem}.path-grid{grid-template-columns:1fr}.path-card{min-height:unset}.hero-actions .button{width:100%}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.slide-pair{grid-template-columns:1fr}.site-footer .brand-name b{font-size:1.08rem}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* Independent learning manipulatives */
.ten-frame{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:9px;padding:16px;margin:17px 0;background:#f5f9ff;border:1px solid #d9e6f4;border-radius:17px;max-width:440px}
.ten-counter{display:block;aspect-ratio:1;border:2px solid #b6ccea;background:#fff;border-radius:50%;position:relative}
.ten-counter.is-filled{background:#50b99d;border-color:#12866c;box-shadow:inset 0 0 0 4px #bdf4e1}
.fraction-bar{display:grid;width:100%;border-radius:12px;overflow:hidden;max-width:480px;height:68px;border:2px solid #568bbf;background:#fff;margin:10px 0}
.fraction-bar-small{height:50px}
.fraction-part{min-width:0;border-right:1px solid #8cb0dc;background:#fff}
.fraction-part:last-child{border-right:none}
.fraction-part.is-filled{background:#5fa8e8}
.fraction-bar-small .fraction-part.is-filled{background:#37b18f}

/* Six-grade-band learning entrance */
.path-grid.path-grid-six{grid-template-columns:repeat(3,minmax(0,1fr))}
@media(max-width:900px){.path-grid.path-grid-six{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:550px){.path-grid.path-grid-six{grid-template-columns:1fr}}


/* Portfolio evidence components · 2026-10 */
.portfolio-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:28px}
.portfolio-stat{border:1px solid var(--border);border-radius:18px;background:#fff;padding:20px;box-shadow:0 9px 26px rgba(21,45,85,.04)}
.portfolio-stat strong{display:block;color:#173d76;font-size:1.55rem;line-height:1.15;font-weight:950;letter-spacing:-.035em}
.portfolio-stat span{display:block;margin-top:6px;color:var(--muted);font-size:.84rem;line-height:1.45;font-weight:700}
.portfolio-note{margin-top:12px;color:#667990;font-size:.78rem;line-height:1.55}
.evidence-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.evidence-card{display:flex;flex-direction:column;min-height:265px;border:1px solid var(--border);border-radius:22px;background:#fff;padding:27px;box-shadow:0 10px 30px rgba(21,45,85,.04)}
.evidence-card .evidence-year{display:inline-flex;align-self:flex-start;margin-bottom:17px;border-radius:999px;background:#edf4ff;color:#315aa8;padding:6px 10px;font-size:.74rem;font-weight:900;letter-spacing:.04em;text-transform:uppercase}
.evidence-card:nth-child(2) .evidence-year{background:#e8f8f2;color:#177865}
.evidence-card:nth-child(3) .evidence-year{background:#fff2e3;color:#9b5b1e}
.evidence-card h3{font-size:1.28rem}
.evidence-card p{color:var(--muted);font-size:.94rem;line-height:1.68;flex-grow:1}
.publication-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.publication-card{position:relative;overflow:hidden;border:1px solid var(--border);border-radius:24px;background:#fff;padding:30px;box-shadow:0 12px 34px rgba(21,45,85,.05)}
.publication-card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:#2f65cf}
.publication-card:nth-child(2):before{background:#159681}
.publication-kicker{display:block;margin-bottom:10px;color:#157b70;font-size:.74rem;font-weight:900;letter-spacing:.1em;text-transform:uppercase}
.publication-card h3{font-size:1.55rem;margin-bottom:10px}
.publication-card p{color:var(--muted);line-height:1.7}
.publication-actions{display:flex;flex-wrap:wrap;gap:9px 16px;margin-top:18px}
.publication-actions a{font-size:.88rem}
.app-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.app-card{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:22px;background:#fff;padding:27px;min-height:290px}
.app-mark{display:grid;place-items:center;width:55px;height:55px;border-radius:16px;background:#eaf2ff;color:#285dcc;font-weight:950;font-size:1.06rem;margin-bottom:19px}
.app-card:nth-child(2) .app-mark{background:#fff2e4;color:#a8611e}
.app-card:nth-child(3) .app-mark{background:#e7f7f1;color:#147b66}
.app-card h3{font-size:1.25rem}
.app-card p{color:var(--muted);font-size:.94rem;line-height:1.67;flex-grow:1}
.app-card small{display:block;color:#667990;margin-top:12px;line-height:1.5}
.timeline-list{display:grid;gap:0;border-left:2px solid #d7e4f3;margin-left:9px;padding-left:30px}
.timeline-item{position:relative;padding:0 0 27px}
.timeline-item:last-child{padding-bottom:0}
.timeline-item:before{content:"";position:absolute;left:-38px;top:5px;width:14px;height:14px;border:3px solid #fff;border-radius:50%;background:#2f65cf;box-shadow:0 0 0 2px #2f65cf}
.timeline-item time{display:block;color:#2d61ba;font-size:.79rem;font-weight:900;letter-spacing:.06em;text-transform:uppercase;margin-bottom:5px}
.timeline-item h3{font-size:1.12rem;margin-bottom:6px}
.timeline-item p{margin:0;color:var(--muted);font-size:.92rem;line-height:1.65}
.portfolio-callout{border:1px solid #cfe1f3;border-radius:23px;background:linear-gradient(130deg,#f7fbff,#eef8f5);padding:30px}
.portfolio-callout h3{font-size:1.45rem;margin-bottom:10px}
.portfolio-callout p{color:var(--muted);line-height:1.72}
.link-cluster{display:flex;flex-wrap:wrap;gap:10px;margin-top:17px}
@media(max-width:900px){.portfolio-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.evidence-grid,.app-grid{grid-template-columns:1fr}}
@media(max-width:760px){.publication-grid{grid-template-columns:1fr}.portfolio-stats{grid-template-columns:1fr 1fr}.publication-card,.portfolio-callout{padding:24px}}
@media(max-width:470px){.portfolio-stats{grid-template-columns:1fr}.publication-actions,.link-cluster{flex-direction:column;align-items:stretch}.publication-actions .button,.link-cluster .button{width:100%}}


/* Publication cover evidence */
.publication-card.with-cover{display:grid;grid-template-columns:145px minmax(0,1fr);gap:24px;align-items:start}
.publication-cover{display:block;width:100%;aspect-ratio:3/4;object-fit:cover;object-position:top;border:1px solid #dce6f2;border-radius:14px;background:#f5f8fc;box-shadow:0 8px 22px rgba(21,45,85,.08)}
.publication-copy{min-width:0}
@media(max-width:620px){.publication-card.with-cover{grid-template-columns:105px minmax(0,1fr);gap:16px}.publication-card.with-cover h3{font-size:1.3rem}}
@media(max-width:430px){.publication-card.with-cover{grid-template-columns:1fr}.publication-cover{width:150px;max-width:55%;margin:0 auto}.publication-copy{text-align:left}}


/* International portfolio refinement · 2026-10-16 */
.portfolio-hero .hero-accent{color:#285dcc}
.hero-roleline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:28px}
.hero-roleline span{display:block;border:1px solid #d9e6f4;border-radius:16px;background:rgba(255,255,255,.82);padding:16px;color:#52667e;font-size:.82rem;line-height:1.45}
.hero-roleline strong{display:block;color:#173d76;font-size:.96rem;margin-bottom:3px}
.portfolio-jump{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.portfolio-jump a{border:1px solid #cfdff1;background:#fff;color:#2d5fae;border-radius:999px;padding:8px 12px;font-size:.8rem;font-weight:850}
.portfolio-jump a:hover{background:#edf4ff}
.selected-work-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.selected-work-card{display:flex;flex-direction:column;min-height:245px;border:1px solid var(--border);border-radius:22px;background:#fff;padding:26px;box-shadow:0 10px 30px rgba(21,45,85,.04)}
.selected-work-card .case-no{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:#edf4ff;color:#2e5fc1;font-weight:950;font-size:.8rem;margin-bottom:18px}
.selected-work-card:nth-child(2n) .case-no{background:#e7f7f1;color:#147b66}
.selected-work-card:nth-child(3n) .case-no{background:#fff1df;color:#a96824}
.selected-work-card h3{font-size:1.2rem}
.selected-work-card p{color:var(--muted);font-size:.92rem;line-height:1.65;flex-grow:1}
.case-study{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);gap:38px;align-items:start}
.case-study-copy>p:not(.section-kicker){color:var(--muted);font-size:1.02rem;line-height:1.78}
.case-outcomes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:24px 0}
.case-outcomes div{border:1px solid #d9e6f3;border-radius:15px;background:#f8fbff;padding:15px}
.case-outcomes strong{display:block;color:#234f94;font-size:.9rem}
.case-outcomes span{display:block;color:#63758b;font-size:.82rem;line-height:1.4;margin-top:3px}
.case-evidence-card{border:1px solid #d7e4f2;border-radius:23px;background:#fff;padding:20px;box-shadow:var(--shadow)}
.case-evidence-card img{display:block;width:100%;aspect-ratio:3/4;object-fit:cover;object-position:top;border-radius:14px;border:1px solid #dbe5f0;margin:10px 0 18px}
.case-evidence-card h3{font-size:1.18rem}
.case-evidence-card p{color:var(--muted);font-size:.9rem;line-height:1.6}
.evidence-label{display:inline-flex;border-radius:999px;background:#e9f6f1;color:#177865;font-size:.72rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em;padding:6px 10px}
.evidence-mosaic{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-bottom:22px}
.evidence-visual{margin:0;border:1px solid var(--border);border-radius:20px;background:#fff;overflow:hidden}
.evidence-visual img{display:block;width:100%;height:230px;object-fit:cover;object-position:top;background:#f5f8fc}
.evidence-visual figcaption{padding:14px 16px}
.evidence-visual figcaption strong,.evidence-visual figcaption span{display:block}
.evidence-visual figcaption strong{color:#213f67}
.evidence-visual figcaption span{color:var(--muted);font-size:.82rem;margin-top:3px}
.activity-evidence-grid,.inside-week{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.activity-evidence-grid div,.inside-week div{border:1px solid #dbe6f2;border-radius:16px;background:#fff;padding:17px}
.activity-evidence-grid strong,.activity-evidence-grid span,.inside-week strong,.inside-week span{display:block}
.activity-evidence-grid strong,.inside-week strong{color:#203f68;font-size:.92rem}
.activity-evidence-grid span,.inside-week span{color:var(--muted);font-size:.82rem;line-height:1.45;margin-top:4px}
.inside-week{margin-top:22px}
.inside-week b{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;background:#edf4ff;color:#2d60bc;font-size:.72rem;margin-bottom:10px}
.app-showcase-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.app-showcase-card{overflow:hidden;border:1px solid var(--border);border-radius:23px;background:#fff;box-shadow:0 12px 34px rgba(21,45,85,.05)}
.app-showcase-card>img{display:block;width:100%;height:190px;object-fit:cover;object-position:center;background:#eef4fb;border-bottom:1px solid #dce7f3}
.app-showcase-body{padding:24px}
.app-showcase-body h3{font-size:1.3rem;margin:7px 0 10px}
.app-showcase-body p{color:var(--muted);font-size:.91rem;line-height:1.62}
.product-context{display:block;color:#157b70;font-size:.72rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em}
.role-note{border-top:1px solid #e1eaf4;padding-top:12px;margin-top:14px}
.status-chip{display:inline-flex;align-items:center;border-radius:999px;background:#edf4ff;color:#2b5eaf;padding:7px 10px;font-size:.76rem;font-weight:850}
.glossary-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.glossary-grid article{border:1px solid #dae5f1;border-radius:18px;background:#fff;padding:22px}
.glossary-grid strong{display:block;color:#1f4c90;font-size:1.12rem;margin-bottom:8px}
.glossary-grid p{margin:0;color:var(--muted);font-size:.88rem;line-height:1.6}
.timeline-wide{max-width:930px;margin-left:12px}
.method-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px}
.method-grid div{border:1px solid #d9e5f2;border-radius:17px;background:#fff;padding:18px 14px;min-height:155px}
.method-grid b,.method-grid strong,.method-grid span{display:block}
.method-grid b{color:#2e62bf;font-size:.75rem;margin-bottom:16px}
.method-grid strong{font-size:1rem;color:#183c65}
.method-grid span{font-size:.8rem;color:var(--muted);line-height:1.45;margin-top:5px}
.research-card{border:1px solid #d8e4f2;border-radius:23px;background:#fff;padding:30px}
.research-card h3{font-size:1.4rem;margin-top:18px}
.research-note{font-size:.82rem;color:#6b7b8e;border-top:1px solid #e3ebf4;padding-top:13px;margin-top:14px}
.discovery-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.discovery-grid a{display:flex;flex-direction:column;min-height:175px;border:1px solid #d9e5f2;border-radius:20px;background:#fff;padding:22px;transition:transform .15s,border-color .15s,box-shadow .15s}
.discovery-grid a:hover{transform:translateY(-2px);border-color:#9db8e4;box-shadow:0 13px 28px rgba(24,57,96,.08)}
.discovery-grid span{color:#167b70;font-size:.72rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em}
.discovery-grid strong{font-size:1.14rem;color:#193c66;margin-top:9px}
.discovery-grid small{color:var(--muted);line-height:1.45;margin-top:7px}
.partnership-band{display:flex;align-items:center;justify-content:space-between;gap:40px;border:1px solid #cbdff1;border-radius:28px;background:linear-gradient(120deg,#f7fbff,#edf8f4);padding:42px}
.partnership-band>div:first-child{max-width:720px}
.partnership-band p:not(.section-kicker){color:var(--muted);line-height:1.7}
.partnership-actions{display:flex;flex-direction:column;gap:10px;min-width:230px}
.home-case-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.home-case-card{display:flex;flex-direction:column;min-height:180px;border:1px solid #d9e5f2;border-radius:20px;background:#fff;padding:22px}
.home-case-card span{font-size:.72rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em;color:#157b70}
.home-case-card strong{font-size:1.18rem;color:#193f6b;margin-top:12px}
.home-case-card small{color:var(--muted);line-height:1.45;margin-top:8px}
.home-case-card:hover{border-color:#9fb9e3;box-shadow:0 10px 25px rgba(23,52,90,.07)}
.home-profile-line{margin-top:20px}
@media(max-width:1050px){.selected-work-grid,.app-showcase-grid,.discovery-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.method-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.home-case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.glossary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:800px){.hero-roleline{grid-template-columns:repeat(2,minmax(0,1fr))}.case-study{grid-template-columns:1fr}.case-evidence-card{max-width:520px}.evidence-mosaic{grid-template-columns:1fr 1fr}.activity-evidence-grid,.inside-week{grid-template-columns:1fr 1fr}.partnership-band{align-items:flex-start;flex-direction:column}.partnership-actions{flex-direction:row;flex-wrap:wrap;min-width:0}}
@media(max-width:620px){.selected-work-grid,.app-showcase-grid,.discovery-grid,.home-case-grid,.glossary-grid{grid-template-columns:1fr}.evidence-mosaic{grid-template-columns:1fr}.activity-evidence-grid,.inside-week{grid-template-columns:1fr}.method-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-roleline{grid-template-columns:1fr}.partnership-band{padding:28px}.partnership-actions{flex-direction:column;width:100%}.partnership-actions .button{width:100%}.app-showcase-card>img{height:175px}}
@media(max-width:430px){.method-grid{grid-template-columns:1fr}.case-outcomes{grid-template-columns:1fr}}


/* Content expansion · Math Library and five new labs · 2026-10-16 */
.concept-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.concept-card{border:1px solid #d9e5f2;border-radius:22px;background:#fff;padding:26px;box-shadow:0 10px 28px rgba(21,45,85,.04)}
.concept-card h3{font-size:1.3rem;margin:10px 0 12px}
.concept-level{display:inline-flex;border-radius:999px;background:#edf4ff;color:#2f5da6;padding:6px 10px;font-size:.72rem;font-weight:900;letter-spacing:.05em;text-transform:uppercase}
.concept-idea{color:#405771;line-height:1.65}
.worked-example{border-left:4px solid #2e67cb;background:#f3f7ff;border-radius:0 12px 12px 0;padding:13px 16px;margin:16px 0}
.worked-example b{display:block;color:#2b5da9;font-size:.76rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:4px}
.worked-example p{margin:0;color:#425b75;line-height:1.6}
.misconception{font-size:.9rem;color:#6b5636;background:#fff8ec;border:1px solid #f0dfbd;border-radius:12px;padding:12px 14px}
.concept-card details{border-top:1px solid #e2ebf4;margin-top:16px;padding-top:14px}
.concept-card summary{cursor:pointer;color:#2859a6;font-weight:850;font-size:.9rem}
.concept-card details p{margin:11px 0 0;color:#465e76;font-size:.9rem;line-height:1.6}
.learning-route-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.learning-route-grid article{border:1px solid #d8e5f2;border-radius:20px;background:#fff;padding:24px}
.learning-route-grid span{display:block;color:#168073;font-size:.72rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em}
.learning-route-grid h3{font-size:1.18rem;margin:8px 0}
.learning-route-grid p{margin:0;color:var(--muted);line-height:1.65}
.array-grid{display:grid;gap:7px;margin:22px 0;padding:18px;border:1px solid #d9e7f4;border-radius:18px;background:#f7fbff;max-width:430px}
.array-grid span{display:block;aspect-ratio:1;border-radius:50%;background:#4b8dde;box-shadow:inset 0 0 0 3px #d8eaff}
.percent-grid{display:grid;grid-template-columns:repeat(10,1fr);gap:3px;margin:20px 0;padding:10px;border:1px solid #cfdeee;border-radius:14px;background:#fff;max-width:360px}
.percent-grid span{aspect-ratio:1;border-radius:3px;background:#edf2f7;border:1px solid #dfe7ef}
.percent-grid span.is-filled{background:#48b495;border-color:#2f9c80}
.triangle-visual,.right-triangle-visual{margin:20px 0;border:1px solid #dbe6f2;border-radius:18px;background:linear-gradient(135deg,#f9fcff,#eef7ff);padding:14px;text-align:center}
.triangle-visual svg,.right-triangle-visual svg{display:block;width:100%;height:auto;max-height:270px}
.triangle-visual text,.right-triangle-visual text{fill:#254e83;font-size:18px;font-weight:850}
.triangle-visual small{display:block;color:#75869a;font-size:.72rem;margin-top:4px}
.data-controls{display:grid;gap:10px;margin:16px 0}
.data-controls label{display:grid;grid-template-columns:58px minmax(0,1fr) 28px;align-items:center;gap:10px;color:#50647c;font-size:.8rem;font-weight:800}
.data-controls input{width:100%;accent-color:#2e63d3}
.data-controls output{color:#2759ab;font-weight:900;text-align:right}
.data-bars{display:grid;grid-template-columns:repeat(5,1fr);align-items:end;gap:9px;height:175px;padding:14px;border:1px solid #dbe6f1;border-radius:17px;background:linear-gradient(180deg,#f9fcff,#eef5fd);margin:18px 0}
.data-bars div{display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%;gap:6px}
.data-bars span{display:block;width:75%;min-height:4px;background:#4d8ddd;border-radius:7px 7px 2px 2px}
.data-bars small{color:#536a83;font-weight:850}
.stat-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:14px 0}
.stat-summary div{border:1px solid #d7e4f2;border-radius:13px;background:#fff;padding:12px;text-align:center}
.stat-summary span{display:block;color:#68798e;font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;font-weight:850}
.stat-summary strong{display:block;color:#214f99;font-size:1.35rem;margin-top:3px}
.library-hero h1{max-width:880px}
@media(max-width:1160px){.site-nav{gap:14px;font-size:.84rem}}
@media(max-width:800px){.concept-grid,.learning-route-grid{grid-template-columns:1fr}}
@media(max-width:620px){.percent-grid{max-width:none}.array-grid{max-width:none}.stat-summary{grid-template-columns:1fr 1fr 1fr}}
@media(max-width:430px){.concept-card{padding:21px}.stat-summary{grid-template-columns:1fr}.data-controls label{grid-template-columns:52px minmax(0,1fr) 24px}}

.library-preview-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.library-preview-grid div{border:1px solid #cfe5db;border-radius:18px;background:#fff;padding:22px}
.library-preview-grid strong{display:block;color:#176e61;font-size:1.35rem;line-height:1.2}
.library-preview-grid span{display:block;color:#61758a;font-size:.84rem;line-height:1.45;margin-top:5px}
@media(max-width:620px){.library-preview-grid{grid-template-columns:1fr 1fr}}
@media(max-width:430px){.library-preview-grid{grid-template-columns:1fr}}