:root{--navy:#071827;--navy-2:#102f46;--navy-3:#173d57;--ink:#12251f;--muted:#61716b;--cream:#f7f4ec;--cream-2:#edf5f1;--paper:#fffefa;--teal:#21cdb8;--teal-dark:#087e72;--teal-soft:#d8faf4;--lime:#c7ff4e;--lime-dark:#75a51c;--orange:#ff8b5e;--orange-soft:#fff0e8;--line:#d8e1dc;--white:#fff;--danger:#b73b32;--success:#087e72;--shadow-sm:0 10px 35px rgba(8,24,39,.07);--shadow:0 24px 70px rgba(8,24,39,.13);--shadow-lg:0 38px 110px rgba(8,24,39,.2);--radius-sm:14px;--radius:24px;--radius-lg:34px;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--ink);font:16px/1.65 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}img,svg{max-width:100%}a{color:inherit}button,input,select,textarea{font:inherit}button{cursor:pointer}:focus-visible{outline:3px solid var(--orange);outline-offset:3px}.skip-link{position:absolute;left:-9999px;top:8px;z-index:99;background:var(--white);padding:10px 14px;border-radius:8px}.skip-link:focus{left:8px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,244,236,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(18,37,31,.1)}.nav-wrap{max-width:var(--max);height:72px;margin:auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-weight:950;letter-spacing:-.055em;text-decoration:none;font-size:1.35rem;color:var(--navy)}.brand em{font-style:normal;color:var(--teal-dark)}.brand::after{content:".";color:var(--orange)}.main-nav{display:flex;align-items:center;gap:25px}.main-nav a{text-decoration:none;font-size:.9rem;font-weight:800}.main-nav a:hover,.main-nav a[aria-current="page"]{color:var(--teal-dark)}.nav-cta{background:var(--navy);color:white!important;padding:10px 16px;border-radius:999px}.nav-cta:hover{background:var(--teal-dark)!important}.menu-button{display:none;border:1px solid var(--line);background:var(--white);border-radius:10px;padding:8px 10px;font-weight:900}
.shell{max-width:var(--max);margin:auto;padding-left:24px;padding-right:24px}.section{padding-top:90px;padding-bottom:90px}.section-sm{padding-top:58px;padding-bottom:58px}.eyebrow{margin:0 0 12px;color:var(--teal-dark);font-size:.74rem;font-weight:950;letter-spacing:.17em;text-transform:uppercase}.on-dark{color:var(--teal)}h1,h2,h3,p{overflow-wrap:break-word}h1,h2{font-family:Georgia,"Times New Roman",serif;font-weight:500;letter-spacing:-.045em;line-height:1.04}h1{font-size:clamp(3.2rem,7vw,6.5rem);margin:0 0 25px}h2{font-size:clamp(2.1rem,4.5vw,4rem);margin:0 0 22px}h3{line-height:1.2}.lead{font-size:clamp(1.05rem,2vw,1.25rem);color:var(--muted);max-width:680px}.muted{color:var(--muted)}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:0;border-radius:999px;padding:14px 20px;background:var(--navy);color:white;text-decoration:none;font-weight:900;box-shadow:0 10px 24px rgba(8,24,39,.14);transition:.2s}.button:hover{transform:translateY(-2px);background:var(--teal-dark)}.button-lime{background:var(--lime);color:var(--navy);border:2px solid var(--navy)}.button-lime:hover{background:#b5f332;color:var(--navy)}.button-ghost{background:transparent;color:var(--navy);border:1px solid #b9c7c0;box-shadow:none}.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero{background:radial-gradient(circle at 86% 18%,rgba(33,205,184,.18),transparent 28%),linear-gradient(145deg,var(--cream),#edf4f0);overflow:hidden}.hero-grid{min-height:690px;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:60px;padding-top:70px;padding-bottom:70px}.hero h1 em{font-style:normal;color:var(--teal-dark)}.trust-line{display:flex;flex-wrap:wrap;gap:18px;margin-top:26px;color:var(--muted);font-size:.86rem;font-weight:750}.trust-line span::before{content:"✓";color:var(--teal-dark);font-weight:950;margin-right:6px}.dashboard{background:var(--navy);color:white;border-radius:32px;padding:28px;box-shadow:0 35px 90px rgba(8,24,39,.26);transform:rotate(1.2deg);position:relative}.dashboard::before{content:"";position:absolute;width:90px;height:90px;border-radius:50%;background:var(--lime);right:-25px;top:-28px;opacity:.85}.dash-label{font-size:.75rem;text-transform:uppercase;letter-spacing:.13em;color:#a6bbb5}.dash-total{font-family:Georgia,serif;font-size:clamp(3rem,7vw,5.2rem);line-height:1;margin:12px 0 5px}.dash-sub{color:#a9bab5}.dash-bars{height:165px;display:flex;align-items:end;gap:12px;border-bottom:1px solid #4b6070;margin:30px 0 20px}.dash-bars i{display:block;flex:1;border-radius:8px 8px 0 0;background:linear-gradient(var(--teal),#0b7f76)}.dash-bars i:nth-child(1){height:35%}.dash-bars i:nth-child(2){height:68%}.dash-bars i:nth-child(3){height:48%;background:linear-gradient(var(--lime),#76a829)}.dash-bars i:nth-child(4){height:88%}.dash-bars i:nth-child(5){height:56%;background:linear-gradient(var(--orange),#b54b26)}.dash-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.dash-stats div{background:#132f44;border:1px solid #29465a;border-radius:14px;padding:13px}.dash-stats span{display:block;color:#99b1aa;font-size:.7rem;text-transform:uppercase}.dash-stats strong{font-size:1.1rem}
.quick-strip{background:var(--navy);color:white}.quick-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center}.quick-form{display:grid;grid-template-columns:1fr 1fr auto;gap:12px;align-items:end}.quick-form label{font-size:.8rem;font-weight:850;color:#c5d2cd}.quick-form input{display:block;width:100%;min-height:48px;margin-top:7px;border:2px solid #8ea39a;background:#fff;border-radius:12px;padding:12px 13px;color:#071827!important;-webkit-text-fill-color:#071827;opacity:1;font-weight:900}.quick-form input::placeholder{color:#60716b;opacity:1}.quick-result{margin-top:18px;font-size:1rem;color:#c8d6d0}.quick-result strong{color:var(--lime)}
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:25px;text-decoration:none;box-shadow:0 10px 35px rgba(8,24,39,.055);transition:.2s}.card:hover{transform:translateY(-4px);border-color:var(--teal);box-shadow:var(--shadow)}.card-icon{width:48px;height:48px;border-radius:15px;display:grid;place-items:center;background:#d6faf4;font-size:1.35rem}.card h3{margin:19px 0 8px;font-size:1.2rem}.card p{color:var(--muted);margin:0}.card-link{display:block;margin-top:20px;color:var(--teal-dark);font-weight:900;font-size:.88rem}.dark-section{background:var(--navy);color:white}.dark-section .lead,.dark-section .muted{color:#b5c7c1}.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.game-preview{background:#102b40;border:1px solid #284459;border-radius:28px;padding:25px}.game-top{display:flex;justify-content:space-between;gap:20px;color:#a9bdb6;font-size:.8rem}.choice-preview{margin-top:18px;background:white;color:var(--ink);border-radius:18px;padding:20px}.choice-preview h3{margin:0 0 14px}.choice-chip{display:block;border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin-top:9px;font-weight:750}.choice-chip.good{border-color:var(--teal);background:#e7fbf8}.score-pill{display:inline-flex;background:var(--lime);color:var(--navy);border-radius:999px;padding:6px 10px;font-weight:950;margin-top:15px}.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.resource-card{display:block;background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:24px;text-decoration:none}.resource-card:hover{border-color:var(--teal-dark)}.resource-card small{color:var(--teal-dark);font-weight:900;text-transform:uppercase;letter-spacing:.08em}.resource-card h3{font-family:Georgia,serif;font-size:1.55rem;font-weight:500;margin:12px 0 9px}.resource-card p{color:var(--muted);margin:0}.faq{max-width:850px}.faq details{border-top:1px solid var(--line);padding:20px 3px}.faq details:last-child{border-bottom:1px solid var(--line)}.faq summary{font-weight:900;cursor:pointer}.faq details p{color:var(--muted);margin-bottom:0}
.page-hero{background:linear-gradient(145deg,var(--navy),#12334b);color:white;padding:78px 0}.page-hero h1{font-size:clamp(2.8rem,6vw,5.1rem);max-width:920px}.page-hero .lead{color:#c6d4cf}.breadcrumb{font-size:.82rem;color:#a9bdb6;margin-bottom:25px}.breadcrumb a{color:var(--teal)}.tool-tabs{display:flex;gap:9px;overflow-x:auto;padding-bottom:7px;margin:0 0 22px}.tool-tab{border:1px solid #b9c6c0;background:rgba(255,255,255,.55);border-radius:999px;padding:11px 16px;white-space:nowrap;font-weight:850}.tool-tab[aria-selected="true"]{background:var(--navy);color:white;border-color:var(--navy)}.tool-panel{background:var(--paper);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);overflow:hidden;display:grid;grid-template-columns:1.08fr .92fr}.tool-panel[hidden]{display:none}.tool-form{padding:36px}.tool-form h2{font-size:2.25rem}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field-grid label{font-size:.8rem;font-weight:850}.field-grid label span{float:right;color:var(--muted);font-size:.68rem;text-transform:uppercase;letter-spacing:.06em}.field-grid input,.field-grid select,textarea{display:block;width:100%;margin-top:7px;border:1px solid #c3cec9;background:white;border-radius:12px;padding:13px;color:var(--ink);font-weight:750}.field-grid input:focus,textarea:focus{outline:0;border-color:var(--teal-dark);box-shadow:0 0 0 4px rgba(33,205,184,.16)}.form-button{grid-column:1/-1;width:100%;margin-top:8px}.result-panel{background:linear-gradient(155deg,var(--navy),var(--navy-2));color:white;padding:42px;display:flex;flex-direction:column;justify-content:center}.result-panel .result-label{color:#a9bbb6;font-size:.8rem;text-transform:uppercase;letter-spacing:.1em}.big-result{font-family:Georgia,serif;font-size:clamp(3rem,6vw,5rem);line-height:1;margin:14px 0 5px}.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:27px 0}.result-box{border:1px solid #3b5262;background:#102d42;border-radius:14px;padding:14px}.result-box span{display:block;color:#9fb4ad;font-size:.68rem;text-transform:uppercase}.result-box strong{font-size:1.15rem}.result-note{background:#17364c;border-radius:12px;padding:13px;color:#ced9d5;font-size:.87rem}.tool-explain{display:grid;grid-template-columns:2fr 1fr;gap:35px;margin-top:42px}.formula{background:#e9f7f3;border-left:5px solid var(--teal-dark);border-radius:12px;padding:20px}.callout{background:#fff5e7;border:1px solid #f1d1a6;border-radius:14px;padding:19px}
.game-shell{display:grid;grid-template-columns:1.2fr .8fr;gap:22px}.game-card{background:var(--paper);border:1px solid var(--line);border-radius:28px;padding:30px;box-shadow:var(--shadow)}.game-meta{display:flex;justify-content:space-between;gap:15px;color:var(--muted);font-size:.84rem}.progress{height:10px;border-radius:99px;background:#dce5e0;overflow:hidden;margin:17px 0 28px}.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--teal-dark),var(--teal));transition:width .3s}.scenario-icon{width:60px;height:60px;border-radius:19px;background:#d8faf4;display:grid;place-items:center;font-size:1.75rem}.game-choices{display:grid;gap:10px;margin-top:20px}.game-choice{background:white;border:2px solid var(--line);border-radius:15px;text-align:left;padding:14px 16px;font-weight:800;color:var(--ink)}.game-choice:hover{border-color:var(--teal)}.game-choice.selected{border-color:var(--teal-dark);background:#e7faf7}.game-choice:disabled{cursor:default}.feedback{border-radius:14px;background:#edf8f5;padding:15px;margin-top:18px}.feedback:empty{display:none}.game-next{margin-top:17px}.hidden{display:none!important}.score-board{background:var(--navy);color:white;border-radius:28px;padding:27px;position:sticky;top:95px;height:max-content}.score-board h2{font-size:2rem}.score-row{display:flex;justify-content:space-between;gap:15px;border-top:1px solid #385064;padding:16px 0}.score-row span{color:#adc0b9}.score-row strong{color:var(--lime)}.game-result{text-align:center}.game-result .final-score{font-family:Georgia,serif;font-size:5rem;line-height:1;color:var(--teal-dark)}
.article-wrap{max-width:800px}.article-wrap h1{font-size:clamp(2.8rem,6vw,5rem)}.article-wrap h2{font-size:2.1rem;margin-top:52px}.article-wrap h3{margin-top:30px}.article-wrap p,.article-wrap li{color:#44564f}.article-wrap ul,.article-wrap ol{padding-left:22px}.article-meta{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 38px;color:var(--muted);font-size:.84rem}.article-meta span{background:#e7eeea;border-radius:999px;padding:6px 10px}.article-cta{background:var(--navy);color:white;border-radius:22px;padding:25px;margin-top:42px}.article-cta p{color:#c4d2cd}.checklist{list-style:none;padding:0!important}.checklist li{padding:12px 0 12px 34px;border-bottom:1px solid var(--line);position:relative}.checklist li::before{content:"✓";position:absolute;left:5px;color:var(--teal-dark);font-weight:950}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:12px;border-bottom:1px solid var(--line)}th{background:#eaf2ee}.contact-form{display:grid;gap:15px;max-width:700px}.contact-form label{font-weight:850}.contact-form input,.contact-form textarea{width:100%;display:block;margin-top:6px;border:1px solid var(--line);background:white;border-radius:12px;padding:13px}.contact-form textarea{min-height:160px;resize:vertical}
.site-footer{background:var(--navy);color:white;padding:62px 0 30px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:35px}.footer-brand p{color:#aabcb6;max-width:310px}.footer-col h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.12em;color:var(--teal)}.footer-col a{display:block;text-decoration:none;color:#d6e0dc;margin:8px 0}.footer-col a:hover{color:var(--lime)}.footer-bottom{border-top:1px solid #2b4354;margin-top:35px;padding-top:20px;display:flex;justify-content:space-between;gap:20px;color:#95aba4;font-size:.78rem}.ad-disclosure{font-size:.75rem;color:var(--muted);text-align:center;margin:20px auto}.noscript{background:#fff1d8;border:1px solid #e4bd79;padding:12px;text-align:center}
@media(max-width:900px){.hero-grid,.quick-grid,.feature-grid,.tool-panel,.game-shell,.tool-explain{grid-template-columns:1fr}.hero-grid{min-height:auto}.dashboard{max-width:650px;transform:none}.card-grid{grid-template-columns:1fr 1fr}.resource-grid{grid-template-columns:1fr 1fr}.score-board{position:static}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:680px){.nav-wrap{height:66px}.menu-button{display:block}.main-nav{display:none;position:absolute;left:12px;right:12px;top:70px;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.main-nav.open{display:flex}.main-nav a{padding:7px}.hero-grid{padding-top:50px;padding-bottom:55px}.section{padding-top:65px;padding-bottom:65px}.quick-form,.field-grid{grid-template-columns:1fr}.quick-form .button{width:100%}.card-grid,.resource-grid{grid-template-columns:1fr}.tool-form,.result-panel,.game-card{padding:24px 20px}.tool-panel{border-radius:20px}.result-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column}.dash-stats{grid-template-columns:1fr}.main-nav .nav-cta{text-align:center}}
.contact-form input:not([type="checkbox"]),.contact-form select,.contact-form textarea{width:100%;display:block;margin-top:6px;border:1px solid var(--line);background:white;border-radius:12px;padding:13px;color:var(--ink)}.contact-form input[type="checkbox"]{width:auto;margin-right:8px;accent-color:var(--teal-dark)}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* V2 shared presentation system ------------------------------------------------ */
html{scroll-padding-top:92px}
body{min-width:300px;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
::selection{background:var(--lime);color:var(--navy)}
img{height:auto}
a{text-underline-offset:.16em;text-decoration-thickness:.08em}
.skip-link{color:var(--navy);border:2px solid var(--navy);font-weight:900}
.site-header{background:rgba(247,244,236,.93);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);transition:box-shadow .2s,background .2s}
.site-header.is-scrolled{background:rgba(255,254,250,.97);box-shadow:0 8px 30px rgba(8,24,39,.08)}
.brand{display:inline-flex;align-items:center}
.main-nav a{position:relative}
.main-nav a:not(.nav-cta)::after{content:"";position:absolute;left:0;right:100%;bottom:-6px;height:2px;background:var(--teal-dark);transition:right .2s}
.main-nav a:not(.nav-cta):hover::after,.main-nav a[aria-current="page"]::after{right:0}
.nav-cta{box-shadow:0 8px 18px rgba(8,24,39,.13);transition:transform .2s,background .2s}
.nav-cta:hover{transform:translateY(-1px)}
.menu-button{color:var(--navy)}
.page-hero{position:relative;background:radial-gradient(circle at 86% 12%,rgba(33,205,184,.2),transparent 25%),linear-gradient(145deg,var(--navy),#12334b);padding:86px 0;overflow:hidden}
.page-hero::after{content:"";position:absolute;width:310px;height:310px;right:-150px;bottom:-210px;border:46px solid rgba(199,255,78,.07);border-radius:50%;pointer-events:none}
.page-hero>.shell{position:relative;z-index:1}
.dark-section{position:relative;background:radial-gradient(circle at 90% 0,rgba(33,205,184,.13),transparent 28%),var(--navy);overflow:hidden}
.dark-section .button:not(.button-lime){background:#17364c;border:1px solid #395268}
.button{min-height:48px;transition:transform .2s,background .2s,box-shadow .2s}
.button:hover{box-shadow:0 14px 32px rgba(8,24,39,.18)}
.button-small{min-height:40px;padding:10px 15px;font-size:.86rem}
.button-orange{background:var(--orange);color:var(--navy)}
.button-orange:hover{background:#ff7543;color:var(--navy)}
.button-white{background:var(--white);color:var(--navy)}
.button-white:hover{background:var(--teal-soft);color:var(--navy)}
.button[disabled],button[disabled]{cursor:not-allowed;opacity:.6;transform:none!important}
.section-heading{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:34px}
.section-heading>div{max-width:750px}
.section-heading h2,.section-heading p:last-child{margin-bottom:0}
.content-narrow{max-width:760px}
.content-wide{max-width:980px}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}
.eyebrow-badge{display:inline-flex;align-items:center;gap:8px;background:var(--teal-soft);color:var(--teal-dark);border-radius:999px;padding:7px 11px;font-size:.72rem;font-weight:950;letter-spacing:.1em;text-transform:uppercase}
.eyebrow-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--teal-dark)}
.pill-row{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}
.pill,.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:6px 10px;background:#e7eeea;color:#354b43;font-size:.76rem;font-weight:850}
.pill-teal,.badge-success{background:var(--teal-soft);color:var(--teal-dark)}
.pill-lime{background:#edffc5;color:#4d710e}
.pill-orange{background:var(--orange-soft);color:#9c4829}

/* Reusable content cards and page layouts */
.content-grid,.tool-card-grid,.step-grid,.comparison-grid,.stat-grid,.case-grid{display:grid;gap:18px}
.content-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.content-grid.two,.comparison-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.tool-card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.step-grid{grid-template-columns:repeat(4,minmax(0,1fr));counter-reset:steps}
.stat-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.case-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.content-card,.feature-card,.tool-card,.step-card,.stat-card,.case-card,.math-card,.worksheet-card{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow-sm)}
a.content-card,a.feature-card,a.tool-card,a.case-card{display:block;color:inherit;text-decoration:none;transition:transform .2s,border-color .2s,box-shadow .2s}
a.content-card:hover,a.feature-card:hover,a.tool-card:hover,a.case-card:hover{transform:translateY(-4px);border-color:var(--teal);box-shadow:var(--shadow)}
.tool-card,.case-card{display:flex;flex-direction:column;min-height:270px;overflow:hidden}
.tool-card::before,.case-card::before{content:"";position:absolute;width:130px;height:130px;right:-70px;top:-75px;border-radius:50%;background:var(--teal-soft)}
.tool-card>* , .case-card>*{position:relative}
.tool-card .card-link,.case-card .card-link{margin-top:auto;padding-top:22px}
.step-card{counter-increment:steps;padding-top:65px}
.step-card::before{content:"0" counter(steps);position:absolute;left:25px;top:20px;color:var(--teal-dark);font-size:.78rem;font-weight:950;letter-spacing:.08em}
.step-card::after{content:"";position:absolute;left:25px;top:48px;width:42px;height:3px;border-radius:2px;background:var(--lime)}
.step-card h3,.content-card h3,.feature-card h3,.tool-card h3,.case-card h3{margin-top:0}
.stat-card{background:linear-gradient(160deg,var(--paper),#f4faf7)}
.stat-card span{display:block;color:var(--muted);font-size:.72rem;font-weight:900;letter-spacing:.09em;text-transform:uppercase}
.stat-card strong{display:block;margin-top:8px;font:500 clamp(1.75rem,4vw,2.65rem)/1 Georgia,serif;color:var(--navy)}
.card,.resource-card{box-shadow:var(--shadow-sm);transition:transform .2s,border-color .2s,box-shadow .2s}
.card:hover,.resource-card:hover{box-shadow:var(--shadow)}
.resource-card{display:flex;flex-direction:column;min-height:245px}
.resource-card::after{content:"Read more →";display:block;margin-top:auto;padding-top:18px;color:var(--teal-dark);font-weight:900;font-size:.84rem}
.resource-card:hover{transform:translateY(-4px)}
.icon-tile{width:52px;height:52px;display:grid;place-items:center;border-radius:16px;background:var(--teal-soft);color:var(--teal-dark);font-size:1.4rem;font-weight:950}
.icon-tile.lime{background:#efffcb;color:#547d0d}
.icon-tile.orange{background:var(--orange-soft);color:#a54a29}
.split-layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(270px,.75fr);gap:42px;align-items:start}
.sticky-side{position:sticky;top:98px}

/* Interactive tool scaffolding */
.interactive-shell{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr);background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}
.interactive-form{padding:38px}
.interactive-result{padding:38px;background:linear-gradient(155deg,var(--navy),var(--navy-2));color:var(--white);display:flex;flex-direction:column;justify-content:center}
.interactive-result .muted{color:#b8c9c3}
.interactive-result h2,.interactive-result h3{color:var(--white)}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.form-grid.one{grid-template-columns:1fr}
.form-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.form-group{display:flex;flex-direction:column;gap:7px}
.form-group.full{grid-column:1/-1}
.form-group label,.field-label{font-size:.82rem;font-weight:900;color:var(--ink)}
.form-help{color:var(--muted);font-size:.78rem;line-height:1.45}
.form-grid input:not([type="checkbox"]):not([type="radio"]),.form-grid select,.form-grid textarea,.interactive-form input:not([type="checkbox"]):not([type="radio"]),.interactive-form select,.interactive-form textarea,.input-control{width:100%;min-height:48px;border:1px solid #bccac3;background:var(--white);border-radius:12px;padding:12px 13px;color:var(--ink);font-weight:750}
.form-grid textarea,.interactive-form textarea,textarea.input-control{min-height:120px;resize:vertical}
input:focus,select:focus,textarea:focus{border-color:var(--teal-dark)!important;box-shadow:0 0 0 4px rgba(33,205,184,.16);outline:0}
input[aria-invalid="true"],select[aria-invalid="true"]{border-color:var(--danger)!important;box-shadow:0 0 0 4px rgba(183,59,50,.12)}
.input-wrap{position:relative}
.input-wrap input{padding-left:35px!important}
.input-prefix{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--muted);font-weight:900;pointer-events:none}
.input-suffix{position:absolute;right:13px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:.78rem;font-weight:900;pointer-events:none}
.input-wrap.has-suffix input{padding-right:52px!important}
.range-row{display:grid;grid-template-columns:1fr 74px;gap:12px;align-items:center}
input[type="range"]{accent-color:var(--teal-dark)}
input[type="checkbox"],input[type="radio"]{accent-color:var(--teal-dark)}
.segmented{display:flex;flex-wrap:wrap;gap:7px;padding:5px;background:#eaf1ed;border-radius:14px}
.segmented button{flex:1;min-width:90px;border:0;border-radius:10px;padding:9px 12px;background:transparent;color:var(--muted);font-weight:850}
.segmented button[aria-pressed="true"],.segmented button.active{background:var(--white);color:var(--navy);box-shadow:0 4px 14px rgba(8,24,39,.08)}
.result-kicker{color:#a9bbb6;font-size:.72rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
.result-hero{margin:12px 0 5px;font:500 clamp(2.8rem,6vw,5rem)/1 Georgia,serif}
.result-sub{color:#c7d4d0}
.mini-kpis{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px;margin:25px 0}
.mini-kpi{border:1px solid #3b5262;background:#102d42;border-radius:14px;padding:14px}
.mini-kpi span{display:block;color:#9fb4ad;font-size:.66rem;font-weight:850;letter-spacing:.07em;text-transform:uppercase}
.mini-kpi strong{display:block;margin-top:5px;font-size:1.1rem;color:var(--white)}
.result-callout{background:#17364c;border-left:4px solid var(--lime);border-radius:12px;padding:15px;color:#d5e0dc;font-size:.88rem}
.result-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
.share-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;border:1px solid var(--line);background:var(--paper);border-radius:16px;padding:15px 17px}
.share-bar p{margin:0}
.tool-nav{display:flex;gap:9px;overflow-x:auto;padding:4px 0 12px;scrollbar-width:thin}
.tool-nav a,.tool-nav button{flex:0 0 auto;border:1px solid #b9c6c0;background:rgba(255,255,255,.65);color:var(--ink);border-radius:999px;padding:10px 15px;text-decoration:none;white-space:nowrap;font-weight:850}
.tool-nav a:hover,.tool-nav a[aria-current="page"],.tool-nav button[aria-selected="true"]{background:var(--navy);color:var(--white);border-color:var(--navy)}

/* Educational evidence, formulas and case studies */
.source-box,.privacy-note,.notice,.example-box,.assumption-box{border-radius:var(--radius-sm);padding:20px}
.source-box{background:#edf8f5;border:1px solid #b8e1d8}
.source-box h2,.source-box h3{margin-top:0;font-size:1.1rem;font-family:inherit;font-weight:950;letter-spacing:0}
.source-box ul{margin-bottom:0;padding-left:20px}
.source-box a{color:var(--teal-dark);font-weight:800}
.privacy-note{background:#efffcb;border:1px solid #cce792;color:#365216}
.privacy-note strong{color:#28410e}
.notice{background:var(--orange-soft);border:1px solid #f2c6b3}
.notice.info{background:#edf5fb;border-color:#c3dbe9}
.notice.success{background:#e8f8f3;border-color:#b4dfd3}
.example-box{background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.assumption-box{background:#f0f4f2;border-left:5px solid var(--teal-dark)}
.formula{position:relative;background:#e9f7f3;border-left-color:var(--teal-dark)}
.formula code,.formula-output{display:block;margin-top:10px;color:var(--navy);font:800 .92rem/1.6 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;white-space:normal}
.math-steps{counter-reset:math;display:grid;gap:12px;margin:25px 0}
.math-step{counter-increment:math;position:relative;padding:16px 16px 16px 56px;background:var(--paper);border:1px solid var(--line);border-radius:14px}
.math-step::before{content:counter(math);position:absolute;left:15px;top:15px;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--navy);color:var(--white);font-weight:900}
.math-step strong{display:block}
.case-table{width:100%;background:var(--paper);border:1px solid var(--line);border-radius:16px;border-collapse:separate;border-spacing:0;overflow:hidden}
.case-table th{background:#eaf2ee;color:var(--navy);font-size:.76rem;text-transform:uppercase;letter-spacing:.06em}
.case-table tr:last-child td{border-bottom:0}
.case-table td:last-child,.case-table th:last-child{text-align:right}
.comparison-card{padding:25px;border:1px solid var(--line);border-radius:20px;background:var(--paper)}
.comparison-card.recommended{border:2px solid var(--teal-dark);background:#f3fcfa}
.comparison-card .comparison-total{font:500 2.4rem/1 Georgia,serif;color:var(--navy)}
.timeline{position:relative;display:grid;gap:18px;margin:28px 0;padding-left:34px}
.timeline::before{content:"";position:absolute;left:10px;top:8px;bottom:8px;width:2px;background:#b8d9d2}
.timeline-item{position:relative}
.timeline-item::before{content:"";position:absolute;left:-30px;top:7px;width:12px;height:12px;border:3px solid var(--cream);border-radius:50%;background:var(--teal-dark);box-shadow:0 0 0 2px var(--teal-dark)}
.timeline-item h3{margin:0 0 5px}

/* Games, worksheets and feedback states */
.game-card{overflow:hidden}
.game-choice{position:relative;transition:transform .15s,border-color .15s,background .15s}
.game-choice:hover:not(:disabled){transform:translateX(3px)}
.game-choice.correct{border-color:var(--success);background:#e7faf7}
.game-choice.incorrect{border-color:var(--orange);background:var(--orange-soft)}
.feedback{border-left:4px solid var(--teal-dark)}
.score-board{background:radial-gradient(circle at 100% 0,rgba(33,205,184,.18),transparent 34%),var(--navy)}
.worksheet-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.worksheet-card{padding:20px}
.worksheet-card h3{margin-top:0}
.worksheet-row{display:grid;grid-template-columns:minmax(0,1fr) 120px;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}
.worksheet-row:last-child{border-bottom:0}
.check-item{display:flex;gap:12px;align-items:flex-start;padding:13px;border:1px solid var(--line);border-radius:13px;background:var(--white)}
.check-item:has(input:checked){border-color:var(--teal);background:#effbf8}
.check-item input{margin-top:5px}
.meter{height:12px;border-radius:999px;background:#dbe5e0;overflow:hidden}
.meter>span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--teal-dark),var(--teal),var(--lime));transition:width .35s}
.empty-state{text-align:center;border:2px dashed #bdcbc4;border-radius:20px;padding:35px 22px;color:var(--muted)}
.empty-state .icon-tile{margin:0 auto 15px}
.toast{position:fixed;right:22px;bottom:22px;z-index:100;max-width:340px;background:var(--navy);color:var(--white);border:1px solid #365269;border-radius:14px;padding:13px 17px;box-shadow:var(--shadow-lg);font-size:.86rem;font-weight:800;transform:translateY(24px);opacity:0;pointer-events:none;transition:transform .2s,opacity .2s}
.toast.show{transform:translateY(0);opacity:1}

/* Better long-form reading */
.article-wrap{font-size:1.02rem}
.article-wrap>p:first-of-type:not(.eyebrow):not(.breadcrumb){font-size:1.15rem}
.article-wrap h2{scroll-margin-top:100px}
.article-wrap blockquote{margin:28px 0;padding:20px 24px;border-left:5px solid var(--lime-dark);background:var(--paper);border-radius:0 14px 14px 0;color:#354a43;font-family:Georgia,serif;font-size:1.2rem}
.article-cta{background:radial-gradient(circle at 95% 0,rgba(33,205,184,.2),transparent 35%),var(--navy);box-shadow:var(--shadow)}
.article-meta span{font-weight:750}
.table-wrap{border-radius:14px;border:1px solid var(--line);background:var(--paper)}
.table-wrap table{min-width:620px}
th{color:var(--navy);font-size:.78rem;letter-spacing:.04em}
tbody tr:hover{background:#f4faf7}
.faq summary{position:relative;list-style:none;padding:21px 42px 21px 3px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:5px;top:13px;color:var(--teal-dark);font:500 1.7rem/1 Georgia,serif}
.faq details[open] summary::after{content:"−"}
.faq details[open] p{animation:faq-in .18s ease-out}
@keyframes faq-in{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.site-footer{background:radial-gradient(circle at 12% 0,rgba(33,205,184,.1),transparent 28%),var(--navy)}
.footer-col a{width:max-content;max-width:100%}

/* Gentle enhancement animation; removed for reduced-motion users */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .45s ease,transform .45s ease}
[data-reveal].revealed{opacity:1;transform:none}

@media(max-width:1050px){
  .tool-card-grid,.content-grid,.case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step-grid,.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .interactive-shell{grid-template-columns:1fr}
  .interactive-result{min-height:380px}
}
@media(max-width:900px){
  .split-layout{grid-template-columns:1fr}
  .sticky-side{position:static}
  .form-grid.three{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section-heading{align-items:start;flex-direction:column}
}
@media(max-width:680px){
  html{scroll-padding-top:76px}
  .shell{padding-left:18px;padding-right:18px}
  h1{font-size:clamp(2.65rem,15vw,4.2rem)}
  h2{font-size:clamp(2rem,10vw,3rem)}
  .page-hero{padding:62px 0}
  .main-nav a:not(.nav-cta)::after{display:none}
  .main-nav a{border-radius:9px}
  .main-nav a:hover{background:#eff7f3}
  .section-heading{margin-bottom:25px}
  .tool-card-grid,.content-grid,.content-grid.two,.case-grid,.comparison-grid,.step-grid,.stat-grid,.worksheet-grid,.form-grid,.form-grid.three{grid-template-columns:1fr}
  .interactive-form,.interactive-result{padding:25px 20px}
  .interactive-shell{border-radius:20px}
  .interactive-result{min-height:0}
  .mini-kpis{grid-template-columns:1fr}
  .worksheet-row{grid-template-columns:1fr}
  .resource-card,.tool-card,.case-card{min-height:0}
  .share-bar{align-items:stretch;flex-direction:column}
  .share-bar .button{width:100%}
  .toast{left:14px;right:14px;bottom:14px;max-width:none}
}
@media print{
  @page{margin:.6in}
  body{background:#fff;color:#000;font-size:11pt}
  .site-header,.site-footer,.ad-disclosure,.button-row,.share-bar,.no-print,.nav-wrap,.page-hero::after{display:none!important}
  .page-hero{background:#fff!important;color:#000!important;padding:0 0 24px}
  .page-hero .lead,.breadcrumb{color:#333!important}
  .section,.section-sm{padding:24px 0}
  .shell{max-width:none;padding:0}
  .interactive-shell,.content-card,.feature-card,.tool-card,.step-card,.stat-card,.case-card,.math-card,.worksheet-card,.source-box,.example-box{box-shadow:none;break-inside:avoid}
  .interactive-shell{display:block;border:1px solid #777}
  .interactive-form{display:none}
  .interactive-result{background:#fff!important;color:#000!important;padding:20px}
  .interactive-result *{color:#000!important}
  a[href]::after{content:" (" attr(href) ")";font-size:.8em;font-weight:400}
  a[href^="#"]::after,a[href^="javascript"]::after,.brand::after{content:""}
}
@media(prefers-reduced-motion:reduce){
  [data-reveal]{opacity:1;transform:none}
  .faq details[open] p{animation:none}
}