:root{--brand:#12784a;--brand-dark:#075433;--brand-deep:#053b28;--brand-soft:#e8f4ec;--brand-line:#c3e0ce;--accent:#c2571f;--accent-soft:#fdf1e8;--ink:#0d2b23;--ink-2:#3d5a51;--muted:#536b61;--line:#d9e6de;--line-strong:#c6d6cf;--panel:#fff;--page:#fff;--soft:#f4f8f6;--soft-2:#eef5f1;--paper:#f5f8f5;--warm:#eefaeb;--white:#fff;--forest:#075433;--forest-deep:#042f2a;--mint:#c7efda;--teal:#12784a;--amber:#f6d389;--inv-bg:#042a25;--inv-bg-2:#075433;--inv-ink:#eaf5f0;--inv-muted:#a9c9bd;--inv-line:#ffffff26;--font-display:"Fraunces", "Georgia", "Times New Roman", serif;--font-body:"Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;--t-xs:.75rem;--t-sm:.8125rem;--t-base:.9375rem;--t-md:1rem;--t-lg:1.125rem;--t-xl:1.375rem;--t-2xl:1.75rem;--s-1:4px;--s-2:8px;--s-3:12px;--s-4:16px;--s-5:20px;--s-6:24px;--s-8:32px;--s-10:40px;--s-12:48px;--s-16:64px;--s-20:80px;--r-xs:8px;--r-sm:12px;--r-md:16px;--r-lg:22px;--r-xl:28px;--r-pill:999px;--sh-1:0 1px 2px #06312b0d, 0 2px 8px #06312b0a;--sh-2:0 4px 12px #06312b12, 0 12px 28px #06312b0f;--sh-3:0 10px 24px #06312b17, 0 26px 60px #06312b1a;--max:1180px;--header-h:72px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);font-family:var(--font-body);-webkit-font-smoothing:antialiased;background:#fff;margin:0;font-size:16px;line-height:1.65}button,input,select,textarea{font:inherit}a{color:inherit;text-decoration:none}a:hover{color:var(--teal)}button{cursor:pointer}img{max-width:100%;display:block}.skip-link{z-index:100;background:#fff;padding:.5rem 1rem;position:absolute;top:-5rem;left:1rem}.skip-link:focus{top:.5rem}.container{width:min(100% - 40px, var(--max));margin-inline:auto}.shell{width:min(1180px,100% - 40px);margin-inline:auto}.narrow{width:min(800px,100%);margin-inline:auto}.site-header{z-index:60;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#fffffffa;position:sticky;top:0}.nav{min-height:var(--header-h);justify-content:space-between;align-items:center;gap:var(--s-6);display:flex;position:relative}.brand{letter-spacing:-.02em;align-items:center;gap:10px;font-weight:750;display:flex}.brand-image-link{align-items:center;display:flex}.brand-logo-nav{object-fit:contain;width:auto;max-width:175px;height:42px;display:block}.nav-links{font-size:var(--t-base);flex-wrap:nowrap;align-items:center;gap:clamp(14px,1.6vw,24px);display:flex}.nav-links>a{color:var(--ink-2);padding:8px 0;font-weight:600;transition:color .15s}.nav-links>a:hover{color:var(--brand-dark)}.nav-links .nav-cta,a.nav-cta{white-space:nowrap;flex:none;justify-content:center;align-items:center;gap:6px;line-height:1.2;transition:background .15s,transform .12s,box-shadow .15s;display:inline-flex;box-shadow:0 1px 3px #0000001f,0 1px 2px #00000014;border-radius:var(--r-pill)!important;background:var(--brand-dark)!important;color:#fff!important;font-weight:650!important;font-size:var(--t-sm)!important;padding:9px 18px!important;text-decoration:none!important}.nav-links .nav-cta:hover,a.nav-cta:hover{transform:translateY(-1px);box-shadow:0 3px 8px #07543340;background:var(--brand)!important;color:#fff!important}.menu-btn{border:1px solid var(--line-strong);background:var(--panel);border-radius:var(--r-sm);cursor:pointer;justify-content:center;align-items:center;width:44px;height:44px;display:none}.menu-btn span{background:var(--ink);width:18px;height:2px;display:block;position:relative}.menu-btn span:before,.menu-btn span:after{content:"";background:var(--ink);width:18px;height:2px;transition:transform .2s;position:absolute;left:0}.menu-btn span:before{top:-6px}.menu-btn span:after{top:6px}.nav.open .menu-btn span{background:0 0}.nav.open .menu-btn span:before{transform:translateY(6px)rotate(45deg)}.nav.open .menu-btn span:after{transform:translateY(-6px)rotate(-45deg)}.nav-dropdown{position:static}.nav-dropdown summary{cursor:pointer;color:var(--ink-2);font-size:var(--t-base);white-space:nowrap;align-items:center;gap:6px;padding:8px 6px;font-weight:600;list-style:none;display:flex}.nav-dropdown summary::-webkit-details-marker{display:none}.nav-dropdown summary:hover,.nav-dropdown[open] summary{color:var(--brand-dark)}.nav-chevron{color:var(--muted);font-size:.85rem;transition:transform .2s}.nav-dropdown[open] .nav-chevron{transform:rotate(180deg)}.nav-mega{z-index:90;margin-inline:auto;width:min(860px,100% - 32px);max-width:calc(100vw - 32px);padding:var(--s-6);border:1px solid var(--line);border-radius:var(--r-lg);background:var(--panel);box-shadow:var(--sh-3);opacity:0;visibility:hidden;pointer-events:none;margin-top:6px;transition:opacity .18s,transform .2s,visibility .18s;position:absolute;top:100%;left:0;right:0;transform:translateY(6px)}.nav-mega:before{content:"";background:0 0;height:18px;position:absolute;top:-18px;left:0;right:0}.nav-dropdown-guides .nav-mega{width:min(720px,100% - 32px)}.nav-dropdown[open]>.nav-mega,.nav-dropdown:hover>.nav-mega,.nav-dropdown:focus-within>.nav-mega{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}.nav-mega-head{justify-content:space-between;align-items:flex-end;gap:var(--s-6);padding:0 2px var(--s-4);border-bottom:1px solid var(--line);display:flex}.nav-mega-head>div{flex-direction:column;display:flex}.nav-mega-head small{color:var(--accent);font-size:var(--t-xs);text-transform:uppercase;letter-spacing:.09em;font-weight:700}.nav-mega-head strong{font-family:var(--font-display);font-size:var(--t-xl);font-weight:600}.nav-mega-head>a{color:var(--brand-dark);font-size:var(--t-sm);font-weight:650;text-decoration:underline}.nav-category-grid{padding:var(--s-4) 0 var(--s-2);grid-template-columns:repeat(3,1fr);gap:6px 10px;display:grid}.nav-category-grid>a{border-radius:var(--r-xs);background:var(--soft);border:1px solid #0000;justify-content:space-between;align-items:center;gap:10px;padding:10px 12px;display:flex}.nav-category-grid>a:hover,.nav-category-grid>a:focus-visible{border-color:var(--brand-line);background:var(--brand-soft);color:var(--brand-dark)}.nav-category-grid span{font-size:var(--t-sm);font-weight:600}.nav-category-grid small{color:var(--muted);font-size:var(--t-xs);white-space:nowrap}.nav-guide-grid{padding:var(--s-4) 0 var(--s-2);grid-template-columns:1fr 1fr;gap:8px;display:grid}.nav-guide-grid>a{border-radius:var(--r-xs);background:var(--soft);border:1px solid #0000;flex-direction:column;gap:3px;padding:11px 12px;display:flex}.nav-guide-grid>a:hover,.nav-guide-grid>a:focus-visible{border-color:var(--brand-line);background:var(--brand-soft);color:var(--brand-dark)}.nav-guide-grid small{color:var(--accent);text-transform:uppercase;letter-spacing:.07em;font-size:.6rem;font-weight:700}.nav-guide-grid span{font-family:var(--font-display);font-size:var(--t-sm);line-height:1.3}.nav-quick-row{padding:var(--s-3) 4px 0;border-top:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:6px 18px;display:flex}.nav-quick-row span{color:var(--muted);font-size:var(--t-xs);text-transform:uppercase;letter-spacing:.06em;font-weight:700}.nav-quick-row a{color:var(--brand-dark);font-size:var(--t-sm);font-weight:600;text-decoration:underline}.nav-search-wrap{flex:none;width:220px;margin-left:4px;position:relative}.nav-search-box{align-items:center;display:flex;position:relative}.nav-search-icon{width:15px;height:15px;color:var(--muted);pointer-events:none;position:absolute;left:11px}.nav-search-input{border-radius:var(--r-pill);border:1px solid var(--line-strong);background:var(--panel);width:100%;height:38px;color:var(--ink);font-size:var(--t-sm);padding:0 14px 0 34px;font-family:inherit;transition:border-color .15s,box-shadow .15s,background .15s}.nav-search-input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);background:var(--page);outline:none}.nav-search-dropdown{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);width:340px;max-height:380px;box-shadow:var(--sh-3);z-index:110;padding:6px;position:absolute;top:calc(100% + 6px);right:0;overflow-y:auto}.nav-search-dropdown[hidden]{display:none}.nav-search-item{border-radius:var(--r-xs);color:var(--ink);font-size:var(--t-sm);justify-content:space-between;align-items:center;gap:8px;padding:7px 9px;text-decoration:none;transition:background .12s;display:flex}.nav-search-item:hover{background:var(--brand-soft);color:var(--brand-dark)}.nav-search-item small{color:var(--muted);background:var(--soft);border-radius:var(--r-pill);padding:2px 6px;font-size:11px}.nav-search-empty{text-align:center;color:var(--muted);font-size:var(--t-sm);padding:14px}h1,h2,h3,h4{letter-spacing:-.035em;color:var(--ink);margin:0 0 .7em;line-height:1.13}h1,h2,.display{font-family:var(--font-display)}h1{font-size:clamp(2.3rem,5.2vw,4.4rem);font-weight:650}h2{font-size:clamp(1.95rem,3vw,2.85rem);font-weight:640}h3{letter-spacing:-.025em;font-size:1.23rem}p{margin:.25rem 0 1rem}.muted{color:var(--muted)}.eyebrow{text-transform:uppercase;letter-spacing:.16em;color:var(--teal);margin:0 0 .75rem;font-size:.75rem;font-weight:800}.hero{background:var(--forest-deep);color:#eaf6ee;position:relative;overflow:hidden}.hero:after{content:"";pointer-events:none;border:1px solid #c7efda24;border-radius:50%;width:48vw;height:48vw;position:absolute;inset:auto -12vw -17vw auto;box-shadow:0 0 0 5vw #c7efda06,0 0 0 11vw #c7efda05}.hero h1,.hero h2{color:#fff}.hero .eyebrow{color:var(--mint)}.hero p{color:#d1e8d9}.hero-lead{max-width:51ch;font-size:1.15rem}.small-hero{padding:2.75rem 0 3.2rem}.small-hero h1{max-width:19ch;margin-bottom:.34em;font-size:clamp(2.45rem,4.5vw,4rem)}.small-hero .hero-lead{margin-bottom:0}.breadcrumb{color:#bfe7d0;flex-wrap:wrap;gap:.55rem;margin-bottom:1.4rem;font-size:.82rem;display:flex}.breadcrumb a{text-underline-offset:3px;text-decoration:underline}.section{padding:clamp(3.5rem,6vw,6rem) 0}.section-tint{background:var(--paper)}.section-title{max-width:720px;margin-bottom:2.1rem}.section-title p:last-child{color:var(--muted);font-size:1.05rem}.grid{gap:1rem;display:grid}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{border:1px solid var(--line);background:#fff;border-radius:18px;padding:1.35rem;transition:transform .18s,border-color .18s,box-shadow .18s;display:block}a.card:hover{color:var(--ink);border-color:#90c9ab;transform:translateY(-3px);box-shadow:0 16px 30px #053e2a12}.card h3{margin:.25rem 0 .45rem}.card p{color:var(--muted);margin:0;font-size:.9rem}.button,.button-ghost{border:1px solid var(--forest);background:var(--forest);color:#fff;border-radius:10px;justify-content:center;align-items:center;min-height:46px;padding:.66rem 1.05rem;font-size:.92rem;font-weight:740;line-height:1.2;transition:background .15s;display:inline-flex}.button:hover{color:#fff;background:#126b58}.button-ghost{border-color:var(--line);color:var(--forest);background:#fff}.button-ghost:hover{border-color:var(--teal);background:#f4faf6}.button-row{flex-wrap:wrap;gap:.75rem;display:flex}.calc-panel{color:var(--ink);z-index:1;background:#fff;border:1px solid #d6e9dd;border-radius:22px;padding:clamp(1.25rem,3vw,2rem);position:relative;box-shadow:0 22px 66px #00191130}.hero .calc-panel h2,.hero .calc-panel h3{color:var(--ink)}.hero .calc-panel .eyebrow{color:var(--teal)}.hero .calc-panel p{color:var(--muted)}.calc-panel h2,.calc-panel h3{letter-spacing:-.04em;margin:0 0 .3rem;font:700 1.35rem Inter,system-ui,sans-serif}.calc-panel .intro{color:var(--muted);margin:0 0 1.4rem;font-size:.91rem}.form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:.85rem;display:grid}.field{color:var(--ink);flex-direction:column;gap:.35rem;font-size:.86rem;font-weight:700;display:flex}.field input,.field select{width:100%;height:46px;color:var(--ink);background:#fff;border:1px solid #b9cfc2;border-radius:9px;min-width:0;padding:.58rem .8rem;font-weight:500}.field input:focus,.field select:focus{border-color:var(--teal)}.calc-result{background:linear-gradient(145deg,#edfaf2,#f8fcf8);border:1px solid #cfe7d5;border-radius:15px;min-height:112px;margin-top:1rem;padding:1.15rem 1.2rem}.calc-result .result-kicker{text-transform:uppercase;letter-spacing:.12em;color:var(--teal);font-size:.72rem;font-weight:800}.calc-result strong{font-family:var(--font-display);letter-spacing:-.035em;color:var(--forest);margin:.4rem 0;font-size:clamp(1.5rem,3vw,2.2rem);line-height:1.15;display:block}.calc-result p{color:#3a5749;margin:0;font-size:.87rem}.calc-result.error{background:#fff6ec;border-color:#eccb9c}.calc-note{color:#566e61;margin:.8rem 0 0;font-size:.78rem}.date-presets{flex-wrap:wrap;gap:.42rem;margin:1rem 0;display:flex}.date-preset{border:1px solid var(--line);color:var(--forest);background:#fff;border-radius:999px;padding:.32rem .68rem;font-size:.77rem;font-weight:700;line-height:1.4}.date-preset:hover,.date-preset.active{background:var(--forest);border-color:var(--forest);color:#fff}.tool-layout{grid-template-columns:minmax(0,1fr) 280px;align-items:start;gap:3rem;display:grid}.tool-main{min-width:0}.tool-main section{margin-bottom:3.8rem;scroll-margin-top:105px}.tool-main h2{font-size:clamp(1.8rem,3vw,2.5rem)}.tool-main p{line-height:1.8}.side-card{border:1px solid var(--line);background:var(--paper);border-radius:15px;padding:1.15rem;position:sticky;top:96px}.side-card h3{margin-bottom:.6rem;font-size:1rem}.side-card a{border-bottom:1px solid var(--line);padding:.38rem 0;font-size:.85rem;font-weight:650;display:block}.side-card a:last-child{border:0}.steps{counter-reset:step;gap:1rem;display:grid}.step{border:1px solid var(--line);background:#fff;border-radius:14px;padding:1.15rem 1.15rem 1.15rem 4rem;position:relative}.step:before{counter-increment:step;content:counter(step, decimal-leading-zero);color:var(--teal);font-weight:800;position:absolute;top:1.05rem;left:1.1rem}.step h3{margin:0 0 .25rem}.step p{color:var(--muted);margin:0;font-size:.9rem}.callout{border-left:4px solid var(--teal);background:#eef7f1;border-radius:0 12px 12px 0;margin:1.5rem 0;padding:1.1rem 1.3rem}.callout p:last-child{margin-bottom:0}.table-wrap{border:1px solid var(--line);border-radius:14px;margin:1.5rem 0;overflow-x:auto}table{border-collapse:collapse;text-align:left;width:100%;font-size:.9rem}th,td{border-bottom:1px solid var(--line);vertical-align:top;padding:.8rem 1rem}th{background:var(--paper);white-space:nowrap}tr:last-child td{border-bottom:0}.faq-list{border-top:1px solid var(--line);margin-top:1.5rem}.faq-list details{border-bottom:1px solid var(--line);padding:1rem .1rem}.faq-list summary{cursor:pointer;padding-right:1.5rem;font-weight:700;list-style:none;position:relative}.faq-list summary:after{content:"+";font-size:1.3rem;line-height:1;position:absolute;right:0}.faq-list details[open] summary:after{content:"−"}.faq-list p{color:var(--muted);margin:.7rem 0 .2rem}.age-highlight{font-family:var(--font-display);color:var(--mint);letter-spacing:-.05em;margin:.5rem 0;font-size:clamp(2.8rem,6vw,5.4rem);line-height:1.05}.index-grid{grid-template-columns:repeat(8,minmax(0,1fr));gap:.45rem;display:grid}.year-link{border:1px solid var(--line);text-align:center;background:#fff;border-radius:8px;padding:.52rem .3rem;font-size:.88rem;font-weight:690;transition:background .15s,color .15s}.year-link:hover{background:var(--forest);color:#fff}.content-columns{grid-template-columns:1.05fr .95fr;align-items:start;gap:2.5rem;display:grid}.reverse-milestones-card{background:var(--paper);border:1px solid var(--line);border-radius:14px;margin-top:1.25rem;padding:1.25rem}.reverse-milestones-card h3{color:var(--ink);margin-bottom:.75rem;font-size:.95rem;font-weight:700}.reverse-quick-table{grid-template-columns:repeat(2,1fr);gap:.5rem .85rem;display:grid}.reverse-quick-row{border:1px solid var(--line);background:#fff;border-radius:8px;justify-content:space-between;align-items:center;padding:.45rem .75rem;font-size:.84rem;display:flex}.reverse-quick-row span{color:var(--muted);font-weight:600}.reverse-quick-row b{color:var(--forest);font-weight:700}@media (max-width:540px){.reverse-quick-table{grid-template-columns:1fr}}.footer{background:var(--inv-bg);color:var(--inv-muted);padding:var(--s-20) 0 var(--s-8);font-size:var(--t-base);margin-top:4rem}.footer a{color:var(--inv-muted);transition:color .15s}.footer a:hover{color:#fff;text-decoration:underline}.footer h3,.footer strong{color:#fff}.footer-grid,.footer-grid-rich{gap:var(--s-8) var(--s-6);grid-template-columns:1.7fr repeat(4,minmax(0,1fr));display:grid}.footer-grid-rich>div{flex-direction:column;gap:8px;display:flex}.footer-grid-rich h3{font-size:var(--t-sm);text-transform:uppercase;letter-spacing:.08em;font-family:var(--font-body);margin-bottom:var(--s-2);color:#9fe7bd;font-weight:700}.footer-brand-panel p{color:var(--inv-muted);max-width:42ch;font-size:.9rem;line-height:1.6}.footer-wordmark{font-family:var(--font-display);font-size:var(--t-2xl);letter-spacing:-.02em;align-items:center;gap:8px;font-weight:600;display:inline-flex;color:#fff!important}.footer-wordmark span{border-radius:var(--r-xs);background:var(--brand);font-family:var(--font-body);font-size:var(--t-sm);padding:3px 9px;font-weight:650}.footer-author-link{font-size:.9rem;font-weight:650;text-decoration:underline;color:#9fe7bd!important}.footer-guides,.footer-guides-all{flex-direction:column;gap:6px;display:flex}.footer-guides-all{margin-top:var(--s-2)}.copyright{margin-top:var(--s-12);padding-top:var(--s-6);border-top:1px solid var(--inv-line);font-size:var(--t-sm);gap:var(--s-3) var(--s-5);flex-wrap:wrap;justify-content:space-between;display:flex}@media (max-width:1080px){.footer-grid,.footer-grid-rich{gap:var(--s-8);grid-template-columns:1fr 1fr}}@media (max-width:940px){.nav-links{top:calc(var(--header-h) + 1px);align-items:stretch;gap:var(--s-1);padding:var(--s-4) var(--s-5) var(--s-6);background:var(--page);border-bottom:1px solid var(--line);box-shadow:var(--sh-3);max-height:calc(100dvh - var(--header-h));flex-direction:column;display:none;position:absolute;left:0;right:0;overflow:auto}.nav.open .nav-links{display:flex}.menu-btn{display:inline-flex}.nav-links>a{border-bottom:1px solid var(--line);padding:12px 2px}.nav-cta{text-align:center;margin-top:var(--s-3);border-bottom:0!important}.nav-dropdown{border-bottom:1px solid var(--line);width:100%}.nav-dropdown summary{justify-content:space-between;width:100%;padding:12px 2px}.nav-mega{margin:0 0 var(--s-3);padding:var(--s-4);border-radius:var(--r-sm);opacity:1;visibility:visible;pointer-events:auto;box-shadow:none;background:var(--soft);width:100%!important;position:static!important;transform:none!important}.nav-dropdown:not([open])>.nav-mega{display:none!important}.nav-mega-head{display:block}.nav-category-grid{grid-template-columns:1fr 1fr}.nav-guide-grid{grid-template-columns:1fr}.nav-search-wrap{width:100%;max-width:100%;margin:var(--s-2) 0}.nav-search-dropdown{width:auto;left:0;right:0}.tool-layout{grid-template-columns:1fr}.side-card{position:static}}@media (max-width:720px){.shell{width:min(100% - 28px,1180px)}.index-grid{grid-template-columns:repeat(4,1fr)}.form-grid{grid-template-columns:1fr}.content-columns{display:block}}@media (max-width:680px){.container{width:min(100% - 28px, var(--max))}.footer-grid,.footer-grid-rich{grid-template-columns:1fr}}