/* Calc for Class — V16 four-page design build */
:root{
 --navy:#183f60;--navy2:#11334f;--teal:#257178;--teal2:#166168;--coral:#ea6270;--coral2:#cf4b59;
 --ink:#17212b;--muted:#60717f;--line:#dbe4e9;--line2:#c8d5dc;--paper:#fff;--soft:#f5f9fa;--soft2:#edf6f6;
 --success:#16764f;--danger:#b83f49;--shadow:0 18px 46px rgba(22,52,75,.08);--control:0 3px 0 rgba(13,44,66,.13),0 8px 18px rgba(20,50,72,.08);
 --radius:18px;--shell:1180px;--calc-scale:1;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}.shell{width:min(var(--shell),calc(100% - 36px));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}.skip-link{position:fixed;top:8px;left:8px;z-index:9999;background:#fff;border:2px solid var(--navy);padding:8px 12px;border-radius:8px;transform:translateY(-150%)}.skip-link:focus{transform:none}
/* header */
.site-header{position:sticky;top:0;z-index:700;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-top:0!important;border-bottom:1px solid var(--line);transition:transform .22s ease}.site-header:before{content:"";position:absolute;inset:0 0 auto;height:3px;background:linear-gradient(90deg,#173f62 0%,#26747a 100%)}body.ti84-header-hidden .site-header{transform:none}
.header-inner{height:72px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:10px;min-width:max-content}.brand img{width:38px;height:38px;border-radius:10px}.brand-copy{display:grid;line-height:1.05}.brand-copy strong{font-size:1.02rem;letter-spacing:-.02em}.brand-copy small{margin-top:4px;font-size:.60rem;letter-spacing:.08em;color:#73828c}.desktop-nav{display:flex;align-items:center;gap:4px;margin-left:auto}.desktop-nav a{padding:9px 12px;border-radius:10px;color:#354654;font-size:.88rem;font-weight:750}.desktop-nav a:hover,.desktop-nav a[aria-current="page"]{background:var(--soft);color:var(--navy)}.desktop-nav .nav-cta{margin-left:6px;border:1px solid var(--line2);background:linear-gradient(#fff,#f7fafb);box-shadow:0 2px 0 rgba(20,50,72,.10);font-weight:850}.menu-toggle{display:none;margin-left:auto;width:40px;height:40px;padding:8px;border:0;border-radius:0;background:transparent;color:var(--navy);box-shadow:none;cursor:pointer;align-items:center;justify-content:center}.menu-toggle:focus-visible{outline:2px solid var(--teal);outline-offset:4px;border-radius:4px}.menu-glyph{position:relative;width:24px;height:18px;display:block}.menu-glyph span,.menu-glyph:before,.menu-glyph:after{content:"";position:absolute;left:0;width:24px;height:2px;border-radius:3px;background:currentColor}.menu-glyph:before{top:1px}.menu-glyph span{top:8px}.menu-glyph:after{top:15px}.mobile-menu{display:none;position:absolute;top:calc(100% + 8px);left:12px;right:12px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 22px 54px rgba(16,47,69,.16)}.mobile-menu.open{display:block}.mobile-menu a{display:flex;align-items:center;justify-content:space-between;padding:12px 13px;border-radius:10px;font-weight:760;color:#344653}.mobile-menu a:hover{background:var(--soft)}.mobile-menu .mobile-cta{margin-top:6px;background:linear-gradient(#215c84,var(--navy));color:#fff;box-shadow:var(--control)}

/* R13 — simplified beneficiary-facing global navigation */
.nav-dropdown{position:relative}.nav-dropdown-trigger{display:flex!important;align-items:center;gap:6px}.nav-chevron{font-size:.8rem;color:#71818c;transition:transform .15s ease}.nav-dropdown-menu{position:absolute;top:calc(100% + 8px);right:0;width:370px;padding:8px;border:1px solid var(--line);border-radius:15px;background:#fff;box-shadow:0 22px 54px rgba(16,47,69,.16);opacity:0;visibility:hidden;transform:translateY(-4px);transition:opacity .14s ease,transform .14s ease,visibility .14s;z-index:900}.nav-dropdown:hover .nav-dropdown-menu,.nav-dropdown:focus-within .nav-dropdown-menu{opacity:1;visibility:visible;transform:none}.nav-dropdown:hover .nav-chevron,.nav-dropdown:focus-within .nav-chevron{transform:rotate(180deg)}.nav-dropdown-menu>a{display:grid!important;grid-template-columns:40px minmax(0,1fr);gap:11px;align-items:center;padding:10px!important;border-radius:11px!important}.nav-dropdown-menu>a:hover{background:var(--soft)!important}.nav-dropdown-menu strong{display:block;font-size:.84rem;color:var(--ink)}.nav-dropdown-menu small{display:block;margin-top:1px;font-size:.69rem;line-height:1.35;color:var(--muted);font-weight:560}.nav-calc-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:var(--soft2);color:var(--navy);font-size:.68rem;font-weight:950}.mobile-menu-group{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:4px 0;padding:4px 0}.mobile-menu-parent{color:var(--navy)!important;font-weight:900!important}.mobile-menu .mobile-sub-link{padding:9px 13px 9px 27px;font-size:.82rem;font-weight:690;color:#536573}.calculator-directory-section{padding-top:68px;border-bottom:1px solid #edf2f4}.calculator-choice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.calculator-choice{display:grid;grid-template-columns:48px minmax(0,1fr) auto;gap:13px;align-items:center;padding:16px;border:1px solid var(--line);border-radius:15px;background:#fff;box-shadow:0 5px 16px rgba(22,52,75,.035);transition:transform .14s ease,border-color .14s ease,box-shadow .14s ease}.calculator-choice:first-child{grid-column:1/-1}.calculator-choice:hover{transform:translateY(-1px);border-color:#b9cdd6;box-shadow:0 10px 24px rgba(22,52,75,.07)}.calculator-choice-icon{display:grid;place-items:center;width:46px;height:46px;border-radius:12px;background:var(--soft2);color:var(--navy);font-size:.75rem;font-weight:950}.calculator-choice strong{display:block;font-size:.94rem}.calculator-choice small{display:block;margin-top:2px;color:var(--muted);font-size:.77rem}.calculator-choice>span:last-child{color:#71818c;font-weight:900}.footer-bottom{justify-content:flex-start}
@media(max-width:760px){.calculator-choice-grid{grid-template-columns:1fr}.calculator-choice:first-child{grid-column:auto}.calculator-directory-section{padding-top:52px}}

/* controls */
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 17px;border:1px solid #123a57;border-radius:11px;background:linear-gradient(#225e86,var(--navy));color:#fff;font-weight:800;box-shadow:var(--control);cursor:pointer;transition:transform .12s ease,box-shadow .12s ease}.button:hover{transform:translateY(-1px);background:linear-gradient(#20577d,var(--navy2))}.button:active{transform:translateY(2px);box-shadow:0 1px 0 rgba(13,44,66,.14),0 3px 8px rgba(20,50,72,.06)}.button.secondary{border-color:var(--line2);background:linear-gradient(#fff,#f6fafb);color:var(--navy);box-shadow:0 2px 0 rgba(20,50,72,.10),0 6px 12px rgba(20,50,72,.05)}.button.learn{border-color:#b9d8d6;background:linear-gradient(#fff,#f0faf9);color:var(--teal2)}.button.practice{border-color:#ca4553;background:linear-gradient(#f07480,var(--coral));color:#fff;box-shadow:0 3px 0 rgba(170,48,62,.17),0 8px 16px rgba(190,62,76,.10)}.button.compact{min-height:38px;padding:7px 12px;border-radius:9px;font-size:.82rem}.button.ghost{border:0;background:transparent;color:var(--navy);box-shadow:none;padding-inline:6px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--teal2);font-weight:900;text-transform:uppercase;letter-spacing:.10em;font-size:.73rem}.eyebrow:before{content:"";width:18px;height:2px;background:currentColor;border-radius:8px}.lead{color:var(--muted);font-size:1.08rem;line-height:1.65}.section{padding:72px 0}.section-soft{background:var(--soft)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:28px}.section-head h2{font-size:clamp(2rem,4vw,3.15rem);line-height:1.08;letter-spacing:-.045em;margin:8px 0 0}.section-head p{max-width:550px;color:var(--muted);margin:0}.breadcrumbs{display:flex;gap:8px;flex-wrap:wrap;color:#73838e;font-size:.82rem}.breadcrumbs a:hover{color:var(--navy)}
/* home */
.home-hero{position:relative;z-index:20;background:linear-gradient(180deg,#f4f9fa 0%,#fff 94%);border-bottom:1px solid #edf2f4}.home-hero:before{content:"";position:absolute;inset:0;z-index:-1;background-image:linear-gradient(rgba(24,63,96,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(24,63,96,.035) 1px,transparent 1px);background-size:34px 34px;mask-image:linear-gradient(#000,transparent 80%)}.hero-grid{display:grid;grid-template-columns:minmax(0,1.14fr) minmax(340px,.86fr);gap:56px;align-items:center;padding:72px 0 64px}.hero-copy h1{font-size:clamp(3rem,5.5vw,5.2rem);line-height:.99;letter-spacing:-.055em;margin:13px 0 20px;max-width:770px}.hero-copy .lead{max-width:720px}.intent-tabs{display:inline-grid;grid-template-columns:repeat(3,1fr);gap:2px;padding:4px;margin:24px 0 12px;background:#e7eef1;border-radius:12px}.intent-tabs button{border:0;background:transparent;border-radius:9px;padding:8px 16px;color:#536573;font-weight:800;cursor:pointer}.intent-tabs button.is-active{background:#fff;color:var(--navy);box-shadow:0 2px 0 rgba(18,53,76,.08),0 5px 10px rgba(18,53,76,.05)}.intent-tabs button[data-intent="learn"].is-active{color:var(--teal2)}.intent-tabs button[data-intent="practice"].is-active{color:#af3c48;background:#fff8f8}
.task-search{position:relative;z-index:100;max-width:820px}.search-row{position:relative}.search-row input{width:100%;height:64px;padding:0 116px 0 50px;border:1px solid var(--line2);border-radius:17px;background:#fff;color:var(--ink);font-size:1rem;outline:none;box-shadow:0 13px 32px rgba(22,52,75,.08)}.search-row input:focus{border-color:var(--teal);box-shadow:0 0 0 4px rgba(37,113,120,.10),0 13px 32px rgba(22,52,75,.07)}.search-icon{position:absolute;left:18px;top:50%;transform:translateY(-50%);color:#607481;font-size:1.25rem}.search-row button{position:absolute;right:8px;top:8px;height:48px;padding:0 19px;border:1px solid #123a57;border-radius:11px;background:linear-gradient(#225e86,var(--navy));color:#fff;font-weight:850;box-shadow:var(--control);cursor:pointer}.search-results{display:none;position:absolute;z-index:1000;left:0;right:0;top:calc(100% + 8px);max-height:350px;overflow:auto;padding:8px;background:#fff;border:1px solid var(--line);border-radius:15px;box-shadow:0 24px 54px rgba(17,49,72,.18)}.search-results.open{display:block}.search-result{display:grid;grid-template-columns:40px minmax(0,1fr) auto;gap:12px;align-items:center;padding:11px;border-radius:11px;border-bottom:1px solid #edf1f3}.search-result:last-child{border-bottom:0}.search-result:hover,.search-result.is-selected{background:var(--soft)}.search-result b{font-size:.91rem}.search-result small{display:block;margin-top:2px;color:var(--muted);font-size:.78rem}.result-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:var(--soft2);color:var(--navy);font-size:.75rem;font-weight:950}.result-type{color:#71818c;font-size:.67rem;font-weight:850;text-transform:uppercase;letter-spacing:.06em}.search-hints{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}.search-hints button{border:1px solid #d8e2e7;background:rgba(255,255,255,.7);color:#526774;border-radius:999px;padding:6px 10px;font-size:.76rem;font-weight:720;cursor:pointer}
.hero-board{border:1px solid #d4e0e5;border-radius:26px;background:rgba(255,255,255,.88);padding:23px;box-shadow:var(--shadow)}.board-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.board-status{display:inline-flex;align-items:center;gap:7px;color:var(--success);font-size:.76rem;font-weight:850}.board-status:before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor;box-shadow:0 0 0 4px rgba(22,118,79,.09)}.math-screen{position:relative;height:200px;margin:18px 0;border-radius:17px;background:linear-gradient(180deg,#f7fbfc,#eef6f6);border:1px solid #dbe8ea;overflow:hidden}.math-screen:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(24,63,96,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(24,63,96,.05) 1px,transparent 1px);background-size:24px 24px}.axis-x,.axis-y{position:absolute;background:#aebec7}.axis-x{left:0;right:0;top:58%;height:1px}.axis-y{top:0;bottom:0;left:50%;width:1px}.parabola{position:absolute;left:50%;top:52%;width:185px;height:170px;border:3px solid var(--teal);border-color:var(--teal) transparent transparent var(--teal);border-radius:50%;transform:translate(-50%,-12%) rotate(45deg);opacity:.95}.equation{position:absolute;top:17px;left:17px;z-index:2;padding:6px 9px;border:1px solid #d2e3e3;border-radius:8px;background:rgba(255,255,255,.92);font:700 1rem ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--navy)}.board-paths{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.board-paths a{padding:12px;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:0 2px 0 rgba(18,53,76,.06)}.board-paths strong{display:block;font-size:.82rem}.board-paths small{color:var(--muted);font-size:.70rem}.board-paths a:nth-child(2){border-color:#c9e2df}.board-paths a:nth-child(3){border-color:#f0cbd0;background:#fffafa}
.path-band{position:relative;z-index:1;border-bottom:1px solid var(--line);background:#fff}.path-grid{display:grid;grid-template-columns:repeat(3,1fr)}.path-grid a{display:grid;grid-template-columns:38px 1fr auto;gap:13px;align-items:center;padding:22px 26px;border-right:1px solid var(--line)}.path-grid a:first-child{border-left:1px solid var(--line)}.path-num{display:grid;place-items:center;width:36px;height:36px;border:1px solid #d4e0e5;border-radius:10px;background:#f8fbfc;color:var(--navy);font-size:.72rem;font-weight:900;box-shadow:0 2px 0 rgba(18,53,76,.07)}.path-grid a:nth-child(2) .path-num{color:var(--teal2)}.path-grid a:nth-child(3) .path-num{color:#b63c49;border-color:#f0c8ce;background:#fff9f9}.path-grid strong{font-size:.92rem}.path-grid small{display:block;color:var(--muted);font-size:.76rem}.path-arrow{color:#6b7d88}
.featured-flow{display:grid;grid-template-columns:minmax(0,1fr) 410px;gap:52px;align-items:center}.featured-flow h2{font-size:clamp(2.2rem,4.5vw,3.7rem);line-height:1.06;letter-spacing:-.05em;margin:10px 0 17px}.flow-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:23px}.task-list{border-top:2px solid var(--ink)}.task-list a{display:grid;grid-template-columns:45px 1fr auto;gap:14px;align-items:center;padding:17px 0;border-bottom:1px solid var(--line)}.task-list .task-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:11px;background:var(--soft2);color:var(--navy);font-size:.72rem;font-weight:950}.task-list strong{font-size:.95rem}.task-list small{display:block;color:var(--muted);font-size:.77rem}.principle-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.principle{padding:23px 0;border-top:2px solid var(--ink)}.principle .num{font-size:.72rem;color:var(--teal);font-weight:900}.principle h3{font-size:1.15rem;margin:12px 0 5px}.principle p{color:var(--muted);font-size:.90rem;margin:0}
/* product subnav */
.product-nav{position:relative;z-index:50;background:#fff;border-bottom:1px solid var(--line)}.product-nav-inner{height:58px;display:flex;align-items:center;justify-content:space-between;gap:16px}.product-name{display:flex;align-items:center;gap:9px;font-weight:900;color:var(--navy)}.product-badge{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;border:1px solid #d3e4e5;background:linear-gradient(#fff,var(--soft2));box-shadow:0 2px 0 rgba(18,53,76,.08);font-size:.72rem}.product-tabs{display:flex;gap:4px;padding:4px;background:#edf2f4;border-radius:12px}.product-tabs a{padding:7px 13px;border-radius:8px;color:#526573;font-size:.83rem;font-weight:760}.product-tabs a.is-active{background:#fff;color:var(--navy);font-weight:900;box-shadow:0 2px 0 rgba(18,53,76,.08),0 5px 10px rgba(18,53,76,.05)}
/* calculator page */
.workspace{padding:16px 0 56px;background:#fff}.workspace-head{display:flex;align-items:end;justify-content:space-between;gap:24px;padding:0 0 16px}.workspace-head h1{font-size:clamp(1.7rem,3vw,2.45rem);line-height:1.1;letter-spacing:-.04em;margin:7px 0 6px}.workspace-head p{margin:0;color:var(--muted);font-size:.92rem}.runtime-pill{display:inline-flex;align-items:center;gap:7px;border:1px solid #cfe5d9;border-radius:999px;padding:6px 9px;background:#f2fbf6;color:var(--success);font-size:.71rem;font-weight:850}.runtime-pill:before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor}.workspace-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(310px,.68fr);gap:20px;align-items:start}.calculator-section{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:var(--shadow);scroll-margin-top:12px}.calculator-focus-head{display:flex;justify-content:center;align-items:center;padding:11px 13px;border-bottom:1px solid var(--line);background:#fbfcfd}.zoom-controls{display:flex;align-items:center;justify-content:center;gap:7px;flex-wrap:wrap}.zoom-controls button{height:38px;min-width:40px;padding:0 11px;border:1px solid var(--line2);border-radius:9px;background:linear-gradient(#fff,#f6f9fa);color:var(--navy);font-weight:850;box-shadow:0 2px 0 rgba(18,53,76,.08);cursor:pointer}.zoom-controls button:active{transform:translateY(1px);box-shadow:none}.zoom-label{min-width:54px;text-align:center;font-weight:900;color:var(--ink)}.calculator-stage{min-height:calc(645px * var(--calc-scale));display:flex;justify-content:center;align-items:flex-start;padding:7px 8px 18px;overflow:auto;background:#f0f4f5}.calculator-stage.is-loading{background:linear-gradient(100deg,#eef3f4 35%,#fff 50%,#eef3f4 65%);background-size:300% 100%;animation:load 1.5s linear infinite}@keyframes load{to{background-position:-300% 0}}.calculator-shell{position:relative;display:inline-block;transform:scale(var(--calc-scale));transform-origin:top center;isolation:isolate}.calculator-shell.brand-light:before{content:"";position:absolute;top:5px;left:11px;width:104px;height:15px;background:#080808;border-radius:2px;z-index:2147483647;pointer-events:none}.calculator-shell.brand-minimized:after{content:"";position:absolute;top:5px;right:11px;width:100px;height:15px;background:#080808;border-radius:2px;z-index:2147483647;pointer-events:none}#calculatorDiv{outline:none!important;margin-inline:auto}.runtime-status{margin:0;padding:10px 13px;border-top:1px solid var(--line);background:#f9fbfb;color:var(--muted);font-size:.78rem}.runtime-status.is-ready{color:var(--success)}.runtime-error{max-width:520px;margin:30px auto;background:#fff8e8;border:1px solid #e4c677;color:#6d4b14;border-radius:14px;padding:18px}.task-panel{border:1px solid var(--line);border-radius:20px;background:#fff;padding:17px;box-shadow:0 8px 22px rgba(22,52,75,.05)}.task-panel h2{font-size:1.36rem;letter-spacing:-.035em;margin:6px 0 12px}.workflow-link{display:grid;grid-template-columns:36px 1fr auto;gap:12px;align-items:center;padding:13px 2px;border-top:1px solid var(--line)}.workflow-icon{display:grid;place-items:center;width:35px;height:35px;border:1px solid #d5e3e7;border-radius:9px;background:var(--soft);color:var(--navy);font-size:.70rem;font-weight:950}.workflow-link strong{font-size:.88rem}.workflow-link small{display:block;color:var(--muted);font-size:.70rem}.task-panel-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:13px}.task-panel-actions .button{min-height:40px;padding:7px 9px;font-size:.77rem}.connection-note{margin:14px 0 0;color:var(--muted);font-size:.75rem}.content-section{padding:66px 0}.content-section.soft{background:var(--soft)}.content-two{display:grid;grid-template-columns:minmax(0,1fr) 420px;gap:56px;align-items:start}.content-two h2{font-size:clamp(2.1rem,4vw,3.3rem);line-height:1.08;letter-spacing:-.048em;margin:8px 0 18px}.content-two p{color:var(--muted)}.capability-list{border-top:2px solid var(--ink)}.capability-list div{display:grid;grid-template-columns:45px 1fr;gap:12px;padding:15px 0;border-bottom:1px solid var(--line)}.capability-list b{display:grid;place-items:center;width:40px;height:40px;border-radius:10px;background:var(--soft2);color:var(--navy);font-size:.69rem}.capability-list strong{font-size:.91rem}.capability-list small{display:block;color:var(--muted);font-size:.76rem}.workflow-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.workflow-card{padding:20px;border:1px solid var(--line);border-radius:16px;background:#fff}.workflow-card small{color:var(--teal2);font-size:.71rem;font-weight:900;text-transform:uppercase;letter-spacing:.07em}.workflow-card h3{font-size:1.08rem;margin:9px 0}.workflow-card code{display:block;padding:9px 10px;border-radius:9px;background:var(--soft);color:var(--navy);white-space:normal;font:700 .78rem ui-monospace,SFMono-Regular,Menlo,monospace}.workflow-card p{color:var(--muted);font-size:.84rem}.faq details{border-bottom:1px solid var(--line);padding:15px 0}.faq summary{font-weight:850;cursor:pointer}.faq p{color:var(--muted);font-size:.90rem}.disclosure{padding:25px 0;border-top:1px solid var(--line);font-size:.82rem;color:var(--muted)}
/* fullscreen calculator */
.calculator-fullscreen-target:fullscreen{width:100%;height:100%;display:flex;flex-direction:column;border:0;border-radius:0;background:#f1f4f5}.calculator-fullscreen-target:fullscreen .calculator-stage{flex:1;min-height:0;align-items:center}.calculator-fullscreen-target:fullscreen .calculator-focus-head,.calculator-fullscreen-target:fullscreen .runtime-status{flex:0 0 auto}.calculator-fullscreen-target.is-pseudo-fullscreen{position:fixed!important;inset:0!important;width:100vw!important;height:100dvh!important;max-width:none!important;margin:0!important;border:0!important;border-radius:0!important;z-index:2147483000!important;background:#f1f4f5!important;display:flex!important;flex-direction:column!important;overflow:hidden!important;box-shadow:none!important}.calculator-fullscreen-target.is-pseudo-fullscreen .calculator-focus-head{flex:0 0 auto!important;padding:calc(8px + env(safe-area-inset-top,0px)) max(8px,env(safe-area-inset-right,0px)) 8px max(8px,env(safe-area-inset-left,0px))!important;background:#fff!important}.calculator-fullscreen-target.is-pseudo-fullscreen .calculator-stage{flex:1 1 auto!important;min-height:0!important;height:auto!important;padding:6px max(4px,env(safe-area-inset-right,0px)) calc(6px + env(safe-area-inset-bottom,0px)) max(4px,env(safe-area-inset-left,0px))!important;display:flex!important;align-items:center!important;justify-content:center!important;overflow:auto!important;-webkit-overflow-scrolling:touch}.calculator-fullscreen-target.is-pseudo-fullscreen .runtime-status{display:none!important}body.calculator-overlay-open{overflow:hidden!important}
/* learn */
.page-hero{padding:44px 0 34px;background:linear-gradient(180deg,#f5f9fa,#fff);border-bottom:1px solid #edf2f4}.page-hero h1{font-size:clamp(2.8rem,5vw,4.6rem);line-height:1.02;letter-spacing:-.055em;margin:12px 0 17px;max-width:820px}.page-hero .lead{max-width:760px}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.hero-stats{display:flex;gap:22px;flex-wrap:wrap;margin-top:25px;padding-top:20px;border-top:1px solid var(--line)}.hero-stats span{display:grid}.hero-stats strong{font-size:1rem;color:var(--navy)}.hero-stats small{color:var(--muted);font-size:.72rem}.jump-bar{border-bottom:1px solid var(--line);background:#fff}.jump-inner{display:flex;align-items:center;gap:13px;overflow:auto;padding:11px 0;scrollbar-width:none}.jump-inner>span{font-size:.72rem;color:#73838e;font-weight:900;text-transform:uppercase;letter-spacing:.07em;white-space:nowrap}.jump-inner a{white-space:nowrap;border:1px solid #d9e4e8;border-radius:999px;padding:6px 10px;color:#526674;font-size:.75rem;font-weight:750}.learn-layout{display:grid;grid-template-columns:255px minmax(0,1fr);gap:42px;align-items:start;padding:52px 0 72px}.lesson-nav{position:sticky;top:88px;border:1px solid var(--line);border-radius:16px;background:#fff;padding:10px}.lesson-nav a{display:grid;grid-template-columns:28px 1fr;gap:9px;align-items:center;padding:9px;border-radius:9px;color:#566975;font-size:.79rem;font-weight:720}.lesson-nav a:hover{background:var(--soft)}.lesson-nav a.is-active{background:var(--soft2);color:var(--navy)}.lesson-nav a.is-active b{background:#dcecef}.lesson-nav b{display:grid;place-items:center;width:27px;height:27px;border-radius:8px;background:var(--soft2);color:var(--navy);font-size:.67rem}.jump-inner a.is-active{background:var(--navy);border-color:var(--navy);color:#fff}.lesson-content{max-width:900px}.lesson-intro{font-size:1.08rem;color:var(--muted);margin-top:0}.lesson-section{scroll-margin-top:142px;padding:0 0 42px;margin-bottom:42px;border-bottom:1px solid var(--line)}.lesson-section:last-child{border-bottom:0}.lesson-section h2{font-size:clamp(1.7rem,3vw,2.25rem);letter-spacing:-.04em;margin:0 0 12px}.lesson-section p,.lesson-section li{color:var(--muted)}.keyline{display:flex;gap:7px;flex-wrap:wrap;margin:13px 0}.key{display:inline-grid;place-items:center;min-width:38px;min-height:31px;padding:4px 8px;border:1px solid #c5d2d9;border-radius:7px;background:linear-gradient(#fff,#f1f5f6);color:#213846;font-size:.75rem;font-weight:900;box-shadow:0 2px 0 #c4d0d6}.worked-demo{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,400px);gap:18px;align-items:start;margin:18px 0}.worked{margin:0;padding:17px;border-left:3px solid var(--teal);background:var(--soft2);border-radius:0 12px 12px 0}.worked strong{color:var(--ink)}.worked ol{margin-bottom:0}.lesson-demo{margin:0;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:0 6px 18px rgba(18,53,76,.06);overflow:hidden}.lesson-demo-trigger{display:block;width:100%;padding:0;border:0;background:none;text-align:left;cursor:pointer;position:relative}.lesson-demo-trigger img{display:block;width:100%;height:auto;background:#f4f6f8}.lesson-demo-trigger:focus-visible{outline:3px solid rgba(24,63,96,.28);outline-offset:2px}.demo-zoom{position:absolute;right:12px;bottom:12px;border-radius:999px;padding:7px 11px;background:rgba(24,63,96,.92);color:#fff;font-size:.74rem;font-weight:800;letter-spacing:.02em}.lesson-demo figcaption{padding:12px 14px;border-top:1px solid var(--line);font-size:.82rem;color:var(--muted);background:#fbfcfd}.demo-modal{position:fixed;inset:0;display:none;z-index:1200}.demo-modal.open{display:block}.demo-backdrop{position:absolute;inset:0;background:rgba(18,31,46,.58);backdrop-filter:blur(4px)}.demo-dialog{position:relative;z-index:1;max-width:min(1040px,calc(100vw - 28px));max-height:calc(100vh - 28px);overflow:auto;margin:14px auto;background:#fff;border-radius:22px;box-shadow:0 24px 80px rgba(18,33,54,.28)}.demo-close{position:absolute;top:16px;right:16px;width:42px;height:42px;border-radius:12px;border:1px solid #c9d8df;background:#fff;color:#183f60;font-size:2rem;line-height:1;cursor:pointer}.demo-head{padding:26px 26px 18px;border-bottom:1px solid var(--line)}.demo-head h2{font-size:clamp(1.8rem,3vw,2.35rem);margin:10px 0 0;letter-spacing:-.045em}.demo-body{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,.7fr);gap:20px;padding:22px 26px 28px}.demo-stage{border:1px solid var(--line);border-radius:18px;background:#f7f9fb;overflow:hidden}.demo-stage img{display:block;width:100%;height:auto}.demo-panel{border:1px solid var(--line);border-radius:18px;background:#fbfcfd;padding:20px}.demo-panel h3{font-size:1.4rem;margin:0 0 10px;letter-spacing:-.04em}.demo-panel p{margin:0 0 16px;color:var(--muted)}.demo-panel-block strong{display:block;margin:0 0 10px;color:var(--navy);font-size:.95rem}.demo-sequence{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.demo-sequence span{padding:7px 10px;border:1px solid #d7e2e8;border-radius:9px;background:var(--soft2);color:var(--navy);font-size:.8rem;font-weight:800}.demo-expected{padding:14px 16px;border:1px solid #cde4d2;border-radius:14px;background:#f3faf5;color:#365d4a;font-size:.94rem;line-height:1.5}.lesson-tip{padding:13px 15px;border:1px solid #eed2d6;border-radius:12px;background:#fffafa;color:#7d3a43;font-size:.84rem}.next-strip{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px;border:1px solid var(--line);border-radius:16px;background:var(--soft)}
/* practice */
.practice-hero{padding:32px 0 23px;background:#f7fafb;border-bottom:1px solid var(--line)}.practice-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:42px;align-items:end}.practice-hero h1{font-size:clamp(2.2rem,4vw,3.6rem);line-height:1.04;letter-spacing:-.05em;margin:10px 0 12px}.practice-hero p{color:var(--muted);margin:0;max-width:700px}.progress-card{border:1px solid var(--line);border-radius:15px;background:#fff;padding:14px 15px;box-shadow:0 7px 18px rgba(22,52,75,.05)}.progress-top{display:flex;justify-content:space-between;gap:12px;align-items:center}.progress-top strong{font-size:.78rem;text-transform:uppercase;letter-spacing:.07em;color:var(--teal2)}.progress-score{font-weight:900;color:var(--success)}.progress-track{height:7px;margin:10px 0 6px;border-radius:999px;background:#e3eaee;overflow:hidden}.progress-track span{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--teal),#3b9294);transition:width .2s ease}.progress-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:.71rem}.practice-body{padding:30px 0 72px}.practice-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding-bottom:14px;border-bottom:1px solid var(--line)}.set-tabs{display:flex;gap:6px;overflow:auto;scrollbar-width:none}.set-tabs button{white-space:nowrap;border:1px solid #d8e3e7;border-radius:9px;background:#fff;color:#526674;padding:7px 10px;font-size:.75rem;font-weight:780;cursor:pointer}.set-tabs button.is-active{background:var(--navy);border-color:var(--navy);color:#fff;box-shadow:0 2px 0 #0e2e45}.practice-actions{display:flex;gap:7px}.practice-set{display:none;padding-top:26px}.practice-set.is-current{display:block}.set-head{display:flex;align-items:end;justify-content:space-between;gap:18px;padding-bottom:13px;border-bottom:2px solid var(--ink)}.set-head small{color:var(--teal2);font-weight:900;text-transform:uppercase;letter-spacing:.07em}.set-head h2{font-size:1.6rem;letter-spacing:-.035em;margin:5px 0 0}.set-count{color:var(--muted);font-size:.77rem}.ti84-problem{padding:25px 0 27px;border-bottom:1px solid var(--line)}.ti84-problem h3{font-size:1.08rem;margin:0 0 7px}.problem-workflow{color:var(--muted);font-size:.84rem}.practice-hint,.answer-reveal{margin:12px 0;border:1px solid var(--line);border-radius:10px;background:var(--soft);padding:9px 11px}.practice-hint{border-left:3px solid var(--teal);background:var(--soft2)}.practice-hint summary,.answer-reveal summary{cursor:pointer;color:var(--navy);font-size:.78rem;font-weight:800}.practice-hint p,.answer-reveal p{color:var(--muted);font-size:.82rem}.problem-answer-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:9px;align-items:end;max-width:650px;margin-top:13px}.problem-answer-row label{display:grid;gap:5px;color:#5c6e7a;font-size:.75rem;font-weight:750}.problem-answer-row input{height:44px;border:1px solid var(--line2);border-radius:10px;background:#fff;padding:0 12px;outline:none}.problem-answer-row input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(37,113,120,.10)}.practice-result{min-height:1.3em;margin:8px 0 0;font-size:.80rem;font-weight:750}.practice-result.correct{color:var(--success)}.practice-result.incorrect{color:var(--danger)}.ti84-problem.is-correct{border-left:3px solid var(--success);padding-left:14px}.ti84-problem.is-incorrect{border-left:3px solid var(--danger);padding-left:14px}.set-next{display:flex;justify-content:flex-end;padding-top:20px}
/* footer */
.site-footer{border-top:1px solid var(--line);background:#f8fafb;padding:32px 0 20px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(2,1fr);gap:32px}.footer-brand p{max-width:360px;color:var(--muted);font-size:.84rem}.site-footer h2{font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--navy);margin:0 0 10px}.site-footer nav a{display:block;margin:7px 0;color:#566975;font-size:.84rem}.footer-bottom{display:flex;justify-content:space-between;gap:15px;margin-top:26px;padding-top:15px;border-top:1px solid var(--line);color:#71818b;font-size:.75rem}
@media(max-width:1000px){.hero-grid,.featured-flow,.content-two{grid-template-columns:1fr;gap:32px}.hero-board{max-width:720px}.workspace-grid{grid-template-columns:1fr}.task-panel{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}.task-panel h2,.task-panel>.eyebrow,.task-panel-actions,.connection-note{grid-column:1/-1}.practice-hero-grid{grid-template-columns:1fr;gap:18px}.progress-card{max-width:700px}.workflow-cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:820px){.shell{width:min(var(--shell),calc(100% - 24px))}.header-inner{height:64px}.brand img{width:36px;height:36px}.brand-copy small{display:none}.desktop-nav{display:none}.menu-toggle{display:flex}.product-nav-inner{height:52px}.product-name span:last-child{display:none}.product-tabs a{padding:7px 10px;font-size:.78rem}.hero-grid{padding:50px 0 42px}.hero-copy h1{font-size:clamp(2.75rem,10vw,4.3rem)}.path-grid{grid-template-columns:1fr}.path-grid a,.path-grid a:first-child{border-left:0;border-right:0;border-bottom:1px solid var(--line);padding:16px 2px}.section{padding:56px 0}.principle-grid{grid-template-columns:1fr}.workspace{padding-top:12px}.workspace-head{align-items:start;flex-direction:column;gap:9px}.task-panel{display:block}.content-two{gap:30px}.learn-layout{grid-template-columns:1fr;padding-top:30px}.lesson-nav{position:static;display:grid;grid-template-columns:repeat(2,1fr)}.worked-demo{grid-template-columns:1fr}.workflow-cards{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}.practice-toolbar{align-items:flex-start;flex-direction:column}.practice-actions{width:100%}.practice-actions .button{flex:1}.site-header .mobile-menu{z-index:900}}
@media(max-width:560px){.hero-grid{padding:38px 0 32px}.hero-copy h1{font-size:2.65rem}.intent-tabs{width:100%}.intent-tabs button{padding-inline:4px}.search-row input{height:60px;padding-right:64px}.search-row button{width:46px;padding:0;font-size:0}.search-row button:after{content:"→";font-size:1rem}.search-result{grid-template-columns:37px 1fr}.result-type{display:none}.hero-board{padding:16px}.math-screen{height:170px}.math-screen-gif{height:auto}.board-paths{grid-template-columns:1fr}.board-paths a{display:grid;grid-template-columns:1fr auto}.section{padding:48px 0}.section-head{align-items:start;flex-direction:column;gap:10px}.featured-flow h2,.content-two h2{font-size:2.15rem}.task-list a{grid-template-columns:42px 1fr auto}.product-tabs a{padding:7px 8px;font-size:.74rem}.workspace-head h1{font-size:1.78rem}.calculator-section{border-radius:15px}.calculator-focus-head{padding:9px 6px}.zoom-controls{width:100%;display:grid;grid-template-columns:38px 44px 38px 1fr 1fr;gap:5px}.zoom-controls button{min-width:0;width:100%;height:38px;padding:0 5px;font-size:.76rem}.zoom-label{min-width:0;font-size:.78rem}.calculator-stage{padding-inline:0}.task-panel-actions{grid-template-columns:1fr}.page-hero{padding:32px 0 27px}.page-hero h1{font-size:2.55rem}.hero-stats{gap:15px}.learn-layout{padding-bottom:50px}.lesson-nav{grid-template-columns:1fr 1fr}.worked-demo{gap:14px}.lesson-demo figcaption{padding:10px 12px}.demo-zoom{right:10px;bottom:10px;font-size:.7rem}.demo-body{grid-template-columns:1fr;padding:16px}.next-strip{align-items:flex-start;flex-direction:column}.practice-hero{padding:26px 0 20px}.practice-hero h1{font-size:2.35rem}.practice-body{padding-top:20px}.problem-answer-row{grid-template-columns:1fr}.problem-answer-row .button{width:100%}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.footer-bottom{flex-direction:column}}
@media(max-width:430px){.product-tabs a{padding:6px 7px}.zoom-controls{grid-template-columns:36px 40px 36px 1fr 1fr}.lesson-nav{grid-template-columns:1fr}.task-panel{padding:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.site-header,.button,.progress-track span{transition:none}.button:hover{transform:none}}
@media print{.site-header,.product-nav,.practice-toolbar,.hero-actions,.site-footer{display:none!important}.practice-set{display:block!important}.practice-hint,.answer-reveal,.problem-answer-row button,.practice-result{display:none!important}.practice-body{padding:0}.ti84-problem{break-inside:avoid}.practice-hero{background:#fff}.practice-hero-grid{display:block}.progress-card{display:none}}


/* V16.1 requested refinement: title retained, workspace-first landing, bare mobile hamburger, trust pages */
.calculator-hero{background:linear-gradient(180deg,#fbfcfc,#fff);border-bottom:1px solid #edf2f4;padding:38px 0 34px}.calculator-hero-inner{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:34px;align-items:end}.calculator-hero h1{font-size:clamp(2.8rem,5.2vw,4.65rem);line-height:1;letter-spacing:-.055em;margin:13px 0 13px}.calculator-hero .lead{max-width:850px;margin-bottom:0}.calculator-kicker{display:inline-flex;margin-top:16px;padding:7px 11px;border-radius:999px;background:#fff2f3;color:#9f2636;font-size:.76rem;font-weight:900}.calculator-hero-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end;padding-bottom:4px}.workspace{scroll-margin-top:84px}.workspace-head h2{font-size:clamp(1.8rem,3vw,2.45rem);letter-spacing:-.04em;margin:6px 0 4px}.workspace-head p{margin:0;color:var(--muted)}

/* Trust/legal pages: V15 content preserved verbatim, visual system fully updated. */
.trust-page{background:#fbfcfc}.trust-hero{padding:58px 0 44px;background:linear-gradient(180deg,#f5f9fa,#fff);border-bottom:1px solid #edf2f4}.trust-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:48px;align-items:center}.trust-hero h1,.trust-page .page-hero h1,#main>.page-hero h1{font-size:clamp(2.55rem,5vw,4.6rem);line-height:1.02;letter-spacing:-.052em;margin:15px 0}.trust-summary-card{background:linear-gradient(150deg,#1b496b,#183f60);color:#fff;border:1px solid #173953;border-radius:22px;padding:24px;box-shadow:0 18px 42px rgba(22,52,75,.15)}.trust-summary-card strong{font-size:1.08rem}.trust-summary-card ul{margin:14px 0 0;padding-left:20px;color:#eef6f8}.trust-summary-card li{margin:8px 0}.trust-page .section,#main>.section{padding:56px 0}.trust-content-grid,.policy-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}.policy-content{min-width:0;background:#fff;border:1px solid var(--line);border-radius:20px;padding:clamp(23px,4vw,38px);box-shadow:0 12px 34px rgba(22,52,75,.055)}.policy-content h2{margin:35px 0 10px;font-size:1.52rem;line-height:1.2;letter-spacing:-.025em}.policy-content h2:first-child{margin-top:0}.policy-content p,.policy-content li{color:var(--muted)}.policy-content a{color:var(--navy);font-weight:780;text-decoration:underline;text-decoration-color:#b7ced8;text-underline-offset:3px}.policy-summary{background:var(--soft);border:1px solid var(--line);border-left:4px solid var(--teal);border-radius:15px;padding:18px 19px;margin-bottom:30px}.policy-summary strong{font-size:1.05rem}.policy-summary ul{margin:10px 0 0;padding-left:20px}.policy-updated{color:var(--muted);font-size:.9rem}.sidebar-card,.content-card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:19px;box-shadow:0 8px 22px rgba(22,52,75,.045)}.trust-sidebar{position:sticky;top:92px}.trust-sidebar h2{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--teal2);margin:0 0 8px}.trust-sidebar a{display:block;padding:9px 0;border-bottom:1px solid var(--line);color:#536774;font-size:.86rem;font-weight:730}.trust-sidebar a:last-child{border-bottom:0}.trust-principles{display:grid;grid-template-columns:1fr 1fr;gap:11px;margin:18px 0}.trust-principles>div{padding:16px;border:1px solid var(--line);border-radius:14px;background:#fbfcfc}.trust-principles strong,.trust-principles span{display:block}.trust-principles strong{color:var(--ink)}.trust-principles span{color:var(--muted);font-size:.9rem;margin-top:4px}.mission-card{padding:21px;border:1px solid #e1c66c;border-radius:17px;background:#fffaf0}.mission-card p:last-child{margin-bottom:0}.status-pill{display:inline-flex;padding:6px 10px;border-radius:999px;background:#fff0ba;color:#684d0c;font-size:.72rem;font-weight:900;text-transform:uppercase;letter-spacing:.05em}
.trust-page .page-hero.shell,#main>.page-hero.shell{padding-top:54px;padding-bottom:34px}.trust-page .page-hero .lead,#main>.page-hero .lead{max-width:840px}.contact-layout{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:26px;align-items:start}.contact-form-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:clamp(22px,4vw,34px);box-shadow:0 12px 34px rgba(22,52,75,.055)}.contact-form-card h2{margin-top:0;font-size:clamp(1.6rem,3vw,2.15rem);letter-spacing:-.035em}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-field{display:flex;flex-direction:column;gap:7px;margin-bottom:16px}.form-field label{font-weight:850;color:var(--ink)}.form-field label span{color:var(--coral2)}.form-field input,.form-field select,.form-field textarea{width:100%;border:1px solid var(--line2);border-radius:11px;padding:12px 13px;background:#fff;color:var(--ink);outline:none}.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--teal);box-shadow:0 0 0 4px rgba(37,113,120,.10)}.form-field textarea{min-height:180px;resize:vertical}.form-help{font-size:.84rem;color:var(--muted);margin:0}.contact-sidebar{display:grid;gap:14px}.contact-sidebar h2{font-size:1.08rem;margin:0 0 5px}.contact-sidebar p{color:var(--muted);font-size:.9rem}.contact-sidebar a{color:var(--navy);font-weight:780}.form-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:18px}.form-status{border-radius:12px;padding:12px 14px;margin:16px 0 0;border:1px solid var(--line);background:var(--soft)}.form-status[data-kind="success"]{background:#edf7f1;border-color:#a7d1b8;color:#285f42}.form-status[data-kind="error"]{background:#fff0f1;border-color:#e1afb5;color:#8a2e38}.form-status[data-kind="warning"],.form-status[data-kind="turnstile"]{background:#fff8df;border-color:#e5c96c;color:#6b5300}.turnstile-wrap{margin-top:14px;min-height:65px}.honeypot{position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;overflow:hidden!important}.trust-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:22px}.trust-strip div{border:1px solid var(--line);border-radius:13px;padding:13px;background:#fff}.trust-strip strong{display:block;color:var(--teal2)}.trust-strip span{display:block;color:var(--muted);font-size:.82rem;margin-top:3px}
@media(max-width:900px){.calculator-hero-inner,.trust-hero-grid,.trust-content-grid,.policy-layout{grid-template-columns:1fr}.calculator-hero-actions{justify-content:flex-start}.trust-summary-card,.trust-sidebar{max-width:720px}.trust-sidebar{position:static}}
@media(max-width:820px){.contact-layout{grid-template-columns:1fr}.contact-grid,.trust-strip{grid-template-columns:1fr}.calculator-hero{padding:30px 0 27px}.calculator-hero h1{font-size:clamp(2.45rem,10vw,3.7rem)}.menu-toggle{display:flex}.mobile-menu{top:calc(100% + 4px)}}
@media(max-width:600px){.trust-hero{padding:39px 0 29px}.trust-principles{grid-template-columns:1fr}.policy-content{border-radius:16px;padding:19px}.trust-page .page-hero.shell,#main>.page-hero.shell{padding-top:38px;padding-bottom:27px}.trust-page .page-hero h1,#main>.page-hero h1{font-size:2.45rem}.calculator-hero-actions .button{flex:1}}


/* V16.2 layout corrections: persistent stacked navigation, exact plot, bare mobile hamburger */
html,body{padding-top:0!important}
.site-header{position:sticky!important;top:0!important;z-index:1000!important;margin:0!important;transform:none!important}
.product-nav{position:sticky!important;top:72px!important;z-index:900!important;margin:0!important}
.workspace{scroll-margin-top:146px}

/* A mathematically faithful y = x² − 4 plot.  x-axis is y=0, zeros are x=±2, vertex is (0,-4). */
.math-screen .axis-x,.math-screen .axis-y,.math-screen .parabola{display:none!important}
.function-plot{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.plot-axis{stroke:#9fb1bb;stroke-width:1;vector-effect:non-scaling-stroke}
.plot-tick{stroke:#8297a2;stroke-width:1;vector-effect:non-scaling-stroke}
.plot-curve{fill:none;stroke:var(--teal);stroke-width:3.2;stroke-linecap:round;vector-effect:non-scaling-stroke}
.plot-zero{fill:#fff;stroke:var(--teal2);stroke-width:2;vector-effect:non-scaling-stroke}
.plot-vertex{fill:var(--teal2)}
.math-screen-gif{height:auto;min-height:0;padding:10px;background:#f3f4f7;display:flex;align-items:center;justify-content:center}.hero-graph-gif{display:block;width:100%;height:auto;border-radius:18px;box-shadow:0 2px 0 rgba(18,53,76,.06)}

/* Visually only three straight black bars. The 44px touch target remains invisible. */
.menu-toggle,
.menu-toggle:hover,
.menu-toggle:active{
  -webkit-appearance:none!important;appearance:none!important;
  width:44px!important;height:44px!important;margin-left:auto!important;padding:10px!important;
  border:0!important;border-radius:0!important;background:transparent!important;
  color:#111!important;box-shadow:none!important;transform:none!important;
}
.menu-toggle:focus{border:0!important;background:transparent!important;box-shadow:none!important}
.menu-toggle:focus-visible{outline:2px solid #111!important;outline-offset:3px!important;border-radius:0!important}
.menu-glyph{position:relative!important;width:24px!important;height:18px!important;display:block!important}
.menu-glyph span,.menu-glyph:before,.menu-glyph:after{
  content:""!important;position:absolute!important;left:0!important;width:24px!important;height:2px!important;
  border:0!important;border-radius:0!important;background:#111!important;box-shadow:none!important;
}
.menu-glyph:before{top:1px!important}.menu-glyph span{top:8px!important}.menu-glyph:after{top:15px!important}

@media(max-width:820px){
  .product-nav{top:64px!important}
  .workspace{scroll-margin-top:124px}
}

.poster-download{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;margin-top:16px;padding:10px 12px;border:1px solid #bfd0d8;border-radius:12px;background:#fff;color:var(--navy);text-decoration:none;box-shadow:0 2px 0 rgba(18,53,76,.08);transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}.poster-download:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(18,53,76,.10);border-color:#9fbcc7}.poster-download:active{transform:translateY(1px);box-shadow:0 1px 0 rgba(18,53,76,.08)}.poster-download-icon{display:grid;place-items:center;width:36px;height:36px;border-radius:9px;background:var(--navy);color:#fff;font-size:.68rem;font-weight:900;letter-spacing:.04em}.poster-download-copy{display:grid;gap:1px}.poster-download-copy strong{font-size:.88rem;color:var(--navy)}.poster-download-copy small{font-size:.72rem;color:var(--muted)}.poster-download-arrow{font-size:1.15rem;color:var(--teal);font-weight:900}@media(max-width:520px){.poster-download{padding:9px 10px}.poster-download-icon{width:33px;height:33px}.poster-download-copy strong{font-size:.82rem}}

/* TI-84 Scavenger Hunt */
.hunt-hero{background:linear-gradient(180deg,#f4f9fa 0%,#fff 100%);border-bottom:1px solid #edf2f4}.hunt-hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.65fr);gap:48px;align-items:center;padding:52px 0 48px}.hunt-hero h1{font-size:clamp(3rem,6vw,5.35rem);line-height:.98;letter-spacing:-.055em;margin:13px 0 18px}.hunt-hero .lead{max-width:780px}.hunt-hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.hunt-privacy{margin:14px 0 0;color:var(--muted);font-size:.82rem}.hunt-teacher-card{border:1px solid var(--line);border-radius:22px;background:#fff;padding:24px;box-shadow:var(--shadow)}.hunt-teacher-kicker{color:var(--teal2);font-weight:900;text-transform:uppercase;letter-spacing:.08em;font-size:.7rem}.hunt-teacher-card h2{font-size:1.65rem;line-height:1.1;letter-spacing:-.035em;margin:7px 0 16px}.hunt-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:18px}.hunt-facts div{padding:12px 7px;border-radius:12px;background:var(--soft);text-align:center}.hunt-facts strong,.hunt-facts span{display:block}.hunt-facts strong{font-size:1.24rem;color:var(--navy)}.hunt-facts span{margin-top:2px;color:var(--muted);font-size:.67rem;line-height:1.15}.hunt-teacher-card ol{margin:0;padding-left:21px;color:var(--muted);font-size:.9rem}.hunt-teacher-card li{margin:7px 0}.hunt-teacher-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:17px;padding-top:15px;border-top:1px solid var(--line)}.hunt-teacher-links a{color:var(--navy);font-size:.78rem;font-weight:850}.hunt-orientation{border-bottom:1px solid var(--line);background:#fff}.hunt-orientation-grid{display:grid;grid-template-columns:repeat(4,1fr)}.hunt-orientation-grid div{padding:18px 20px;border-right:1px solid var(--line)}.hunt-orientation-grid div:last-child{border-right:0}.hunt-orientation strong,.hunt-orientation span{display:block}.hunt-orientation strong{font-size:.87rem;color:var(--navy)}.hunt-orientation span{margin-top:2px;color:var(--muted);font-size:.78rem}.hunt-body{padding:42px 0 70px}.hunt-layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:30px;align-items:start}.hunt-progress-card{position:sticky;top:154px;padding:18px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 8px 24px rgba(22,52,75,.055)}.hunt-profile{display:grid;gap:6px;padding-bottom:16px;margin-bottom:16px;border-bottom:1px solid var(--line)}.hunt-profile label{font-size:.78rem;font-weight:850;color:#41535f}.hunt-profile label span{font-weight:600;color:var(--muted)}.hunt-profile input{width:100%;border:1px solid var(--line2);border-radius:9px;padding:9px 10px;color:var(--ink);outline:none}.hunt-profile input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(37,113,120,.08)}.hunt-progress-top,.hunt-progress-meta{display:flex;align-items:center;justify-content:space-between;gap:10px}.hunt-progress-top{font-size:.85rem}.hunt-progress-top b{font-size:1.18rem;color:var(--success)}.hunt-progress-track{height:8px;margin:10px 0;background:#e6edf0;border-radius:999px;overflow:hidden}.hunt-progress-track span{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--teal),#42a27d);border-radius:999px;transition:width .25s ease}.hunt-progress-meta{color:var(--muted);font-size:.7rem}.hunt-zone-nav{display:grid;margin:17px 0 10px;border-top:1px solid var(--line)}.hunt-zone-nav a{padding:10px 0;border-bottom:1px solid var(--line);color:#526571;font-size:.78rem;font-weight:780}.hunt-zone-nav a:hover{color:var(--navy)}.hunt-missions{min-width:0}.hunt-zone{scroll-margin-top:150px;margin:0 0 46px}.hunt-zone-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:15px}.hunt-zone-head small{color:var(--teal2);font-weight:900;text-transform:uppercase;letter-spacing:.08em}.hunt-zone-head h2{font-size:clamp(1.7rem,3.3vw,2.5rem);margin:3px 0 3px;letter-spacing:-.04em}.hunt-zone-head p{margin:0;color:var(--muted)}.hunt-zone-head>span{white-space:nowrap;padding:6px 9px;border-radius:999px;background:var(--soft);color:var(--muted);font-size:.72rem;font-weight:800}.hunt-mission{scroll-margin-top:150px;margin-bottom:12px;padding:18px;border:1px solid var(--line);border-radius:17px;background:#fff;transition:border-color .18s ease,box-shadow .18s ease,background .18s ease}.hunt-mission.is-correct{border-color:#a7d2bb;background:#fcfffd;box-shadow:0 0 0 3px rgba(22,118,79,.05)}.hunt-mission.is-incorrect{border-color:#e4b2b7;background:#fffdfd}.hunt-mission-top{display:grid;grid-template-columns:42px minmax(0,1fr);gap:12px;align-items:start}.hunt-number{display:grid;place-items:center;width:40px;height:40px;border-radius:11px;background:var(--soft2);color:var(--navy);font-size:.75rem;font-weight:950}.hunt-mission.is-correct .hunt-number{background:#e6f4eb;color:var(--success)}.hunt-mission.is-incorrect .hunt-number{background:#fff0f1;color:var(--danger)}.hunt-mission h3{margin:0 0 4px;font-size:1.08rem}.hunt-mission-top p{margin:0;color:var(--muted)}.hunt-mission details{margin:14px 0 0;padding:9px 11px;border-radius:10px;background:var(--soft);color:var(--muted);font-size:.82rem}.hunt-mission details summary{cursor:pointer;font-weight:800;color:var(--teal2)}.hunt-mission details p{margin:7px 0 1px}.hunt-answer{display:flex;align-items:end;gap:10px;margin-top:14px}.hunt-answer label{display:grid;gap:5px;color:#41535f;font-size:.76rem;font-weight:850;min-width:190px}.hunt-answer input{width:100%;min-height:42px;border:1px solid var(--line2);border-radius:9px;padding:8px 10px;outline:none}.hunt-answer input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(37,113,120,.08)}.hunt-answer-choice{justify-content:flex-end}.hunt-choices{display:grid;gap:8px;margin:15px 0 0;padding:0;border:0}.hunt-choices label{display:flex;align-items:center;gap:9px;padding:10px 11px;border:1px solid var(--line);border-radius:10px;color:#485d6b;cursor:pointer}.hunt-choices label:has(input:checked){border-color:#9cc7c8;background:#f4fbfa;color:var(--navy)}.hunt-feedback{min-height:22px;margin:11px 0 0;font-size:.82rem;font-weight:780}.hunt-feedback.correct{color:var(--success)}.hunt-feedback.incorrect{color:var(--danger)}.hunt-finish{margin-top:52px;padding:26px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(150deg,#f3f9fa,#fff)}.hunt-finish h2{font-size:clamp(1.9rem,4vw,2.75rem);margin:8px 0 7px;letter-spacing:-.04em}.hunt-finish>p{color:var(--muted)}.hunt-result-card{display:grid;grid-template-columns:210px minmax(0,1fr);gap:20px;align-items:center;margin:20px 0;padding:20px;border:1px solid var(--line);border-radius:17px;background:#fff}.hunt-result-card>div:first-child{display:grid}.hunt-result-card small{color:var(--teal2);font-size:.65rem;font-weight:900;letter-spacing:.08em}.hunt-result-card strong{font-size:3.5rem;line-height:1;color:var(--navy);letter-spacing:-.06em}.hunt-result-card span{color:var(--muted)}.hunt-result-detail{padding-left:20px;border-left:1px solid var(--line)}.hunt-result-detail p{margin:5px 0;color:var(--muted)}.hunt-result-detail b{color:var(--ink)}.hunt-export-actions{display:flex;gap:9px;flex-wrap:wrap}.hunt-export-note{font-size:.76rem!important;margin-bottom:0}.shared-result-banner{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:18px;margin-top:8px;padding:14px 16px;border:1px solid #a7d2bb;border-radius:13px;background:#f0f9f4;color:#315d46}.shared-result-banner div{display:grid}.shared-result-banner strong{font-size:.92rem}.shared-result-banner span{font-size:.8rem}.shared-result-banner a{white-space:nowrap;font-size:.8rem;font-weight:850;color:var(--navy)}.hunt-teacher-section{padding:68px 0;background:var(--soft);border-top:1px solid #edf2f4}.hunt-teacher-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.hunt-teacher-grid article{padding:20px;border:1px solid var(--line);border-radius:16px;background:#fff}.hunt-teacher-grid article>span{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--soft2);color:var(--navy);font-size:.72rem;font-weight:900}.hunt-teacher-grid h3{margin:13px 0 5px}.hunt-teacher-grid p{margin:0;color:var(--muted);font-size:.9rem}.practice-hunt-callout{display:flex;align-items:center;justify-content:space-between;gap:24px;margin:0 auto 24px;padding:16px 18px;border:1px solid #bed7d5;border-radius:15px;background:linear-gradient(110deg,#f2fbfa,#fff)}.practice-hunt-callout div{display:grid}.practice-hunt-callout strong{color:var(--navy);font-size:1rem}.practice-hunt-callout span{color:var(--muted);font-size:.82rem;margin-top:2px}.practice-hunt-callout .button{flex:0 0 auto}
@media(max-width:900px){.hunt-hero-grid{grid-template-columns:1fr}.hunt-teacher-card{max-width:720px}.hunt-layout{grid-template-columns:1fr}.hunt-progress-card{position:static}.hunt-zone-nav{grid-template-columns:repeat(2,1fr);column-gap:14px}.hunt-teacher-grid{grid-template-columns:1fr}.hunt-result-card{grid-template-columns:170px 1fr}}
@media(max-width:650px){.hunt-hero-grid{padding:38px 0 34px;gap:28px}.hunt-hero h1{font-size:3.25rem}.hunt-orientation-grid{grid-template-columns:1fr 1fr}.hunt-orientation-grid div:nth-child(2){border-right:0}.hunt-orientation-grid div:nth-child(-n+2){border-bottom:1px solid var(--line)}.hunt-body{padding-top:28px}.hunt-zone-head{align-items:flex-start}.hunt-zone-head>span{display:none}.hunt-answer{align-items:stretch;flex-direction:column}.hunt-answer label{min-width:0}.hunt-answer .button{width:100%}.hunt-answer-choice{align-items:stretch}.hunt-result-card{grid-template-columns:1fr}.hunt-result-detail{padding:13px 0 0;border-left:0;border-top:1px solid var(--line)}.hunt-export-actions .button{width:100%}.shared-result-banner{align-items:flex-start;flex-direction:column}.practice-hunt-callout{align-items:flex-start;flex-direction:column}.practice-hunt-callout .button{width:100%}}

/* TI-84 Scavenger Hunt */
.hunt-hero{background:linear-gradient(180deg,#f4f9fa 0%,#fff 100%);border-bottom:1px solid #edf2f4}.hunt-hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.65fr);gap:48px;align-items:center;padding:52px 0 48px}.hunt-hero h1{font-size:clamp(3rem,6vw,5.35rem);line-height:.98;letter-spacing:-.055em;margin:13px 0 18px}.hunt-hero .lead{max-width:780px}.hunt-hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.hunt-privacy{margin:14px 0 0;color:var(--muted);font-size:.82rem}.hunt-teacher-card{border:1px solid var(--line);border-radius:22px;background:#fff;padding:24px;box-shadow:var(--shadow)}.hunt-teacher-kicker{color:var(--teal2);font-weight:900;text-transform:uppercase;letter-spacing:.08em;font-size:.7rem}.hunt-teacher-card h2{font-size:1.65rem;line-height:1.1;letter-spacing:-.035em;margin:7px 0 16px}.hunt-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:18px}.hunt-facts div{padding:12px 7px;border-radius:12px;background:var(--soft);text-align:center}.hunt-facts strong,.hunt-facts span{display:block}.hunt-facts strong{font-size:1.24rem;color:var(--navy)}.hunt-facts span{margin-top:2px;color:var(--muted);font-size:.67rem;line-height:1.15}.hunt-teacher-card ol{margin:0;padding-left:21px;color:var(--muted);font-size:.9rem}.hunt-teacher-card li{margin:7px 0}.hunt-teacher-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:17px;padding-top:15px;border-top:1px solid var(--line)}.hunt-teacher-links a{color:var(--navy);font-size:.78rem;font-weight:850}.hunt-orientation{border-bottom:1px solid var(--line);background:#fff}.hunt-orientation-grid{display:grid;grid-template-columns:repeat(4,1fr)}.hunt-orientation-grid div{padding:18px 20px;border-right:1px solid var(--line)}.hunt-orientation-grid div:last-child{border-right:0}.hunt-orientation strong,.hunt-orientation span{display:block}.hunt-orientation strong{font-size:.87rem;color:var(--navy)}.hunt-orientation span{margin-top:2px;color:var(--muted);font-size:.78rem}.hunt-body{padding:42px 0 70px}.hunt-layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:30px;align-items:start}.hunt-progress-card{position:sticky;top:154px;padding:18px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 8px 24px rgba(22,52,75,.055)}.hunt-profile{display:grid;gap:6px;padding-bottom:16px;margin-bottom:16px;border-bottom:1px solid var(--line)}.hunt-profile label{font-size:.78rem;font-weight:850;color:#41535f}.hunt-profile label span{font-weight:600;color:var(--muted)}.hunt-profile input{width:100%;border:1px solid var(--line2);border-radius:9px;padding:9px 10px;color:var(--ink);outline:none}.hunt-profile input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(37,113,120,.08)}.hunt-progress-top,.hunt-progress-meta{display:flex;align-items:center;justify-content:space-between;gap:10px}.hunt-progress-top{font-size:.85rem}.hunt-progress-top b{font-size:1.18rem;color:var(--success)}.hunt-progress-track{height:8px;margin:10px 0;background:#e6edf0;border-radius:999px;overflow:hidden}.hunt-progress-track span{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--teal),#42a27d);border-radius:999px;transition:width .25s ease}.hunt-progress-meta{color:var(--muted);font-size:.7rem}.hunt-zone-nav{display:grid;margin:17px 0 10px;border-top:1px solid var(--line)}.hunt-zone-nav a{padding:10px 0;border-bottom:1px solid var(--line);color:#526571;font-size:.78rem;font-weight:780}.hunt-zone-nav a:hover{color:var(--navy)}.hunt-zone{scroll-margin-top:150px;margin:0 0 46px}.hunt-zone-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:15px}.hunt-zone-head small{color:var(--teal2);font-weight:900;text-transform:uppercase;letter-spacing:.08em}.hunt-zone-head h2{font-size:clamp(1.7rem,3.3vw,2.5rem);margin:3px 0 3px;letter-spacing:-.04em}.hunt-zone-head p{margin:0;color:var(--muted)}.hunt-zone-head>span{white-space:nowrap;padding:6px 9px;border-radius:999px;background:var(--soft);color:var(--muted);font-size:.72rem;font-weight:800}.hunt-mission{scroll-margin-top:150px;margin-bottom:12px;padding:18px;border:1px solid var(--line);border-radius:17px;background:#fff}.hunt-mission.is-correct{border-color:#a7d2bb;background:#fcfffd;box-shadow:0 0 0 3px rgba(22,118,79,.05)}.hunt-mission.is-incorrect{border-color:#e4b2b7;background:#fffdfd}.hunt-mission-top{display:grid;grid-template-columns:42px minmax(0,1fr);gap:12px}.hunt-number{display:grid;place-items:center;width:40px;height:40px;border-radius:11px;background:var(--soft2);color:var(--navy);font-size:.75rem;font-weight:950}.hunt-mission.is-correct .hunt-number{background:#e6f4eb;color:var(--success)}.hunt-mission.is-incorrect .hunt-number{background:#fff0f1;color:var(--danger)}.hunt-mission h3{margin:0 0 4px;font-size:1.08rem}.hunt-mission-top p{margin:0;color:var(--muted)}.hunt-mission details{margin:14px 0 0;padding:9px 11px;border-radius:10px;background:var(--soft);color:var(--muted);font-size:.82rem}.hunt-mission details summary{cursor:pointer;font-weight:800;color:var(--teal2)}.hunt-mission details p{margin:7px 0 1px}.hunt-answer{display:flex;align-items:end;gap:10px;margin-top:14px}.hunt-answer label{display:grid;gap:5px;color:#41535f;font-size:.76rem;font-weight:850;min-width:190px}.hunt-answer input{width:100%;min-height:42px;border:1px solid var(--line2);border-radius:9px;padding:8px 10px;outline:none}.hunt-answer input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(37,113,120,.08)}.hunt-answer-choice{justify-content:flex-end}.hunt-choices{display:grid;gap:8px;margin:15px 0 0;padding:0;border:0}.hunt-choices label{display:flex;align-items:center;gap:9px;padding:10px 11px;border:1px solid var(--line);border-radius:10px;color:#485d6b;cursor:pointer}.hunt-choices label:has(input:checked){border-color:#9cc7c8;background:#f4fbfa;color:var(--navy)}.hunt-feedback{min-height:22px;margin:11px 0 0;font-size:.82rem;font-weight:780}.hunt-feedback.correct{color:var(--success)}.hunt-feedback.incorrect{color:var(--danger)}.hunt-finish{margin-top:52px;padding:26px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(150deg,#f3f9fa,#fff)}.hunt-finish h2{font-size:clamp(1.9rem,4vw,2.75rem);margin:8px 0 7px;letter-spacing:-.04em}.hunt-finish>p{color:var(--muted)}.hunt-result-card{display:grid;grid-template-columns:210px minmax(0,1fr);gap:20px;align-items:center;margin:20px 0;padding:20px;border:1px solid var(--line);border-radius:17px;background:#fff}.hunt-result-card>div:first-child{display:grid}.hunt-result-card small{color:var(--teal2);font-size:.65rem;font-weight:900;letter-spacing:.08em}.hunt-result-card strong{font-size:3.5rem;line-height:1;color:var(--navy)}.hunt-result-detail{padding-left:20px;border-left:1px solid var(--line)}.hunt-result-detail p{margin:5px 0;color:var(--muted)}.hunt-export-actions{display:flex;gap:9px;flex-wrap:wrap}.hunt-export-note{font-size:.76rem!important;margin-bottom:0}.shared-result-banner{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:18px;margin-top:8px;padding:14px 16px;border:1px solid #a7d2bb;border-radius:13px;background:#f0f9f4;color:#315d46}.shared-result-banner div{display:grid}.shared-result-banner a{white-space:nowrap;font-size:.8rem;font-weight:850;color:var(--navy)}.hunt-teacher-section{padding:68px 0;background:var(--soft)}.hunt-teacher-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.hunt-teacher-grid article{padding:20px;border:1px solid var(--line);border-radius:16px;background:#fff}.hunt-teacher-grid article>span{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--soft2);color:var(--navy);font-size:.72rem;font-weight:900}.hunt-teacher-grid h3{margin:13px 0 5px}.hunt-teacher-grid p{margin:0;color:var(--muted);font-size:.9rem}.practice-hunt-callout{display:flex;align-items:center;justify-content:space-between;gap:24px;margin:0 auto 24px;padding:16px 18px;border:1px solid #bed7d5;border-radius:15px;background:linear-gradient(110deg,#f2fbfa,#fff)}.practice-hunt-callout div{display:grid}.practice-hunt-callout strong{color:var(--navy);font-size:1rem}.practice-hunt-callout span{color:var(--muted);font-size:.82rem}.practice-hunt-callout .button{flex:0 0 auto}
@media(max-width:900px){.hunt-hero-grid{grid-template-columns:1fr}.hunt-layout{grid-template-columns:1fr}.hunt-progress-card{position:static}.hunt-zone-nav{grid-template-columns:repeat(2,1fr);column-gap:14px}.hunt-teacher-grid{grid-template-columns:1fr}.hunt-result-card{grid-template-columns:170px 1fr}}
@media(max-width:650px){.hunt-hero-grid{padding:38px 0 34px}.hunt-hero h1{font-size:3.25rem}.hunt-orientation-grid{grid-template-columns:1fr 1fr}.hunt-orientation-grid div:nth-child(2){border-right:0}.hunt-orientation-grid div:nth-child(-n+2){border-bottom:1px solid var(--line)}.hunt-answer{flex-direction:column;align-items:stretch}.hunt-answer label{min-width:0}.hunt-answer .button{width:100%}.hunt-result-card{grid-template-columns:1fr}.hunt-result-detail{padding:13px 0 0;border-left:0;border-top:1px solid var(--line)}.hunt-export-actions .button{width:100%}.shared-result-banner,.practice-hunt-callout{align-items:flex-start;flex-direction:column}.practice-hunt-callout .button{width:100%}}

/* R12 — TI-84 device rim refinement. Visual only: the calculator logic, IDs, events, scaling logic,
   and embedded runtime remain unchanged. This version thickens the molded silver-gray edge to better echo
   the reference TI-84 Plus CE shell: still thin above, fuller on the sides, and most pronounced below. */
#calculatorDiv{
  outline:none!important;
  margin-inline:auto;
  position:relative;
  filter:
    drop-shadow(0 -1.25px 0 rgba(211,215,218,.96))
    drop-shadow(0 -2.1px 0 rgba(181,186,190,.54))
    drop-shadow(-1.95px 0 0 rgba(151,157,161,.86))
    drop-shadow(1.95px 0 0 rgba(163,169,173,.86))
    drop-shadow(-3.1px 0 0 rgba(121,127,131,.52))
    drop-shadow(3.1px 0 0 rgba(132,138,142,.52))
    drop-shadow(0 2.05px 0 rgba(131,137,141,.92))
    drop-shadow(0 3.8px 0 rgba(115,121,125,.82))
    drop-shadow(0 6.1px 0 rgba(96,102,106,.64))
    drop-shadow(0 8px 8px rgba(19,27,31,.17));
}
.calculator-shell{overflow:visible}
@media (max-width:699px){
  #calculatorDiv{
    filter:
      drop-shadow(0 -1.0px 0 rgba(211,215,218,.94))
      drop-shadow(0 -1.6px 0 rgba(181,186,190,.48))
      drop-shadow(-1.45px 0 0 rgba(151,157,161,.82))
      drop-shadow(1.45px 0 0 rgba(163,169,173,.82))
      drop-shadow(-2.35px 0 0 rgba(121,127,131,.48))
      drop-shadow(2.35px 0 0 rgba(132,138,142,.48))
      drop-shadow(0 1.65px 0 rgba(131,137,141,.9))
      drop-shadow(0 3.0px 0 rgba(115,121,125,.78))
      drop-shadow(0 4.9px 0 rgba(96,102,106,.60))
      drop-shadow(0 6px 6px rgba(19,27,31,.15));
  }
}