:root {
  --ink:#172421;
  --muted:#5b6d68;
  --brand:#153f38;
  --brand-2:#087b6b;
  --brand-soft:#e5f2ee;
  --surface:#ffffff;
  --canvas:#f5f7f4;
  --line:#d9e2df;
  --accent:#e9a23b;
  --danger:#a33a3a;
  --shadow:0 18px 50px rgba(21,63,56,.10);
  --radius:18px;
  --container:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--canvas);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}
a{color:var(--brand-2);text-decoration-thickness:.08em;text-underline-offset:.16em}
a:hover{color:var(--brand)}
button,input,select{font:inherit}
button{cursor:pointer}
img,svg{max-width:100%}
.container{width:min(calc(100% - 32px),var(--container));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;left:16px;top:16px;z-index:1000;transform:translateY(-150%);background:#fff;padding:10px 16px;border-radius:8px;box-shadow:var(--shadow)}
.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:100;background:rgba(245,247,244,.94);backdrop-filter:blur(12px);border-bottom:1px solid rgba(217,226,223,.9)}
.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--brand);font-size:1.18rem;font-weight:800;text-decoration:none;letter-spacing:-.02em}
.brand-mark{display:grid;place-items:center;width:42px;height:42px;background:var(--brand);color:#fff;border-radius:12px;font-weight:900;letter-spacing:-.08em}
.primary-nav{display:flex;align-items:center;gap:24px}
.primary-nav a{color:var(--ink);text-decoration:none;font-weight:650;font-size:.94rem}
.primary-nav a:hover,.primary-nav .is-active{color:var(--brand-2)}
.nav-toggle{display:none;border:0;background:transparent;padding:8px}
.nav-toggle span:not(.sr-only){display:block;width:25px;height:2px;background:var(--brand);margin:5px 0}
.hero{padding:76px 0 58px;background:radial-gradient(circle at 90% 10%,#d8eee7 0,transparent 35%),linear-gradient(180deg,#f8faf7 0,var(--canvas) 100%)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(350px,.95fr);align-items:center;gap:64px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 16px;color:var(--brand-2);font-weight:750;text-transform:uppercase;letter-spacing:.09em;font-size:.78rem}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent)}
h1,h2,h3{line-height:1.14;letter-spacing:-.035em;color:var(--brand);margin-top:0}
h1{font-size:clamp(2.35rem,5vw,4.8rem);margin-bottom:22px}
h2{font-size:clamp(1.65rem,3vw,2.65rem);margin-bottom:18px}
h3{font-size:1.18rem;margin-bottom:10px}
.lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:var(--muted);max-width:700px;margin:0 0 28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:12px;padding:12px 18px;font-weight:750;text-decoration:none;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(21,63,56,.18)}
.btn-primary:hover{color:#fff;background:#0f332d}
.btn-secondary{background:#fff;color:var(--brand);border-color:var(--line)}
.calculator-shell{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:var(--shadow)}
.calculator-shell h2{font-size:1.25rem;margin-bottom:16px}
.basic-display{width:100%;border:1px solid var(--line);border-radius:12px;background:#f9fbfa;padding:17px 16px;text-align:right;font-size:1.55rem;font-weight:700;color:var(--brand);margin-bottom:12px}
.keypad{display:grid;grid-template-columns:repeat(4,1fr);gap:9px}
.keypad button{min-height:50px;border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--ink);font-weight:700}
.keypad button:hover{background:var(--brand-soft)}
.keypad .operator{background:#edf6f3;color:var(--brand-2)}
.keypad .equals{background:var(--brand);color:#fff;border-color:var(--brand)}
.keypad .wide{grid-column:span 2}
.calc-message{min-height:24px;margin:10px 0 0;color:var(--danger);font-size:.9rem}
.section{padding:74px 0}
.section-tight{padding:46px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:28px}
.section-head p{max-width:620px;color:var(--muted);margin:0}
.category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.category-card,.tool-card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;color:var(--ink);text-decoration:none;transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease}
.category-card:hover,.tool-card:hover{transform:translateY(-3px);border-color:#b9cec8;box-shadow:0 14px 34px rgba(21,63,56,.08);color:var(--ink)}
.category-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:var(--brand-soft);color:var(--brand);font-size:1.35rem;font-weight:800;margin-bottom:20px}
.category-card p,.tool-card p{color:var(--muted);margin:0}
.card-link{display:inline-flex;margin-top:18px;color:var(--brand-2);font-weight:750}
.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.feature{padding:24px;border-top:3px solid var(--accent);background:#fff;border-radius:0 0 var(--radius) var(--radius)}
.feature p{margin:0;color:var(--muted)}
.featured-tool{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center;background:var(--brand);color:#fff;padding:36px;border-radius:24px}
.featured-tool h2,.featured-tool p{color:#fff}
.featured-tool p{margin:0;max-width:750px;opacity:.86}
.featured-tool .btn{background:#fff;color:var(--brand)}
.breadcrumbs{display:flex;gap:9px;align-items:center;padding-top:24px;color:var(--muted);font-size:.9rem;flex-wrap:wrap}
.breadcrumbs a{color:var(--muted)}
.page-hero{padding:52px 0 32px}
.page-hero h1{font-size:clamp(2.2rem,4.3vw,4rem);max-width:900px}
.page-hero .lead{max-width:780px}
.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:30px;align-items:start;padding-bottom:72px}
.content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px}
.content-card + .content-card{margin-top:20px}
.sticky-aside{position:sticky;top:96px}
.aside-list{display:grid;gap:10px}
.aside-list a{padding:11px 12px;border-radius:10px;background:var(--canvas);text-decoration:none;font-weight:650}
.tool-status{display:inline-flex;padding:5px 10px;border-radius:999px;background:#fff3dc;color:#855000;font-size:.78rem;font-weight:750;margin-bottom:12px}
.tool-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:22px}
.tool-list .tool-card{padding:18px}
.tool-list .is-live{border-color:#9bc9bd;background:#f5fbf9}
.tool-list .is-live .tool-status{background:#dff3ed;color:#176b55}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.field{display:grid;gap:7px}
.field small{color:var(--muted);font-size:.82rem;line-height:1.45}
.field input:disabled,.field select:disabled{opacity:.65;cursor:not-allowed}
.field-full{grid-column:1/-1}
label{font-weight:750;color:var(--brand)}
input,select{width:100%;border:1px solid #bdcbc7;background:#fff;border-radius:11px;padding:13px 14px;color:var(--ink)}
input:focus,select:focus,button:focus-visible,a:focus-visible{outline:3px solid rgba(8,123,107,.25);outline-offset:2px;border-color:var(--brand-2)}
.help{font-size:.88rem;color:var(--muted);margin:0}
.segmented{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.segmented button{border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--brand);padding:9px 14px;font-weight:750}
.segmented button[aria-selected="true"]{background:var(--brand);color:#fff;border-color:var(--brand)}
.result-box{margin-top:24px;border-radius:16px;background:var(--brand);padding:22px;color:#fff}
.result-box[hidden]{display:none}
.result-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.result-item{padding:15px;border:1px solid rgba(255,255,255,.22);border-radius:12px;background:rgba(255,255,255,.08)}
.result-item span{display:block;font-size:.82rem;opacity:.76}
.result-item strong{display:block;font-size:1.35rem;margin-top:3px}
.formula{padding:16px 18px;border-left:4px solid var(--accent);background:#fff8ed;border-radius:0 12px 12px 0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;overflow:auto}
.notice{padding:16px 18px;border:1px solid #efd29e;background:#fff9ed;border-radius:12px;color:#654a1c}
.source-list{padding-left:20px}
.source-list li+li{margin-top:8px}
.faq details{border-top:1px solid var(--line);padding:16px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:800;color:var(--brand)}
.faq p{color:var(--muted);margin:10px 0 0}
.meta-row{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:.9rem;margin-top:20px}
.site-footer{background:#102f2a;color:#dbe9e5;padding:56px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.4fr .7fr .8fr;gap:50px}
.site-footer h2{font-size:1rem;color:#fff;margin-bottom:16px}
.site-footer a{display:block;color:#dbe9e5;margin:8px 0;text-decoration:none}
.site-footer p{color:#b8cbc6;max-width:460px}
.brand-footer{color:#fff}
.brand-footer .brand-mark{background:#fff;color:var(--brand)}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.13);margin-top:42px;padding-top:18px;font-size:.88rem}
.footer-bottom p{margin:0}
.legal-content{max-width:840px;padding-bottom:72px}
.legal-content h2{font-size:1.55rem;margin-top:36px}
.legal-content li+li{margin-top:8px}
.error-page{min-height:65vh;display:grid;place-items:center;text-align:center;padding:60px 0}
.error-code{font-size:clamp(5rem,18vw,12rem);font-weight:900;line-height:.8;color:#c7dad5;margin:0}
@media(max-width:960px){
  .hero-grid,.content-grid{grid-template-columns:1fr}
  .hero-grid{gap:38px}
  .sticky-aside{position:static}
  .category-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .feature-grid{grid-template-columns:1fr}
  .featured-tool{grid-template-columns:1fr}
}
@media(max-width:760px){
  .nav-toggle{display:block}
  .primary-nav{display:none;position:absolute;left:16px;right:16px;top:67px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:0}
  .primary-nav.is-open{display:flex}
  .primary-nav a{padding:11px 10px}
  .hero{padding:52px 0 42px}
  .hero-grid{grid-template-columns:1fr}
  .category-grid,.tool-list,.form-grid,.result-grid{grid-template-columns:1fr}
  .field-full{grid-column:auto}
  .section{padding:56px 0}
  .section-head{display:block}
  .section-head p{margin-top:10px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{display:block}
  .footer-bottom p+p{margin-top:5px}
  .content-card{padding:22px}
  h1{font-size:2.45rem}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* v1.0 components */
.text-input{width:100%;border:1px solid #bdcbc7;background:#fff;border-radius:11px;padding:13px 14px;color:var(--ink);resize:vertical;font:inherit}
.text-input:focus{outline:3px solid rgba(8,123,107,.25);outline-offset:2px;border-color:var(--brand-2)}
.form-actions{margin-top:22px}
.field-spaced{margin-top:18px}
.result-main{font-size:clamp(1.8rem,4vw,3rem);font-weight:850;line-height:1.15;margin:8px 0 20px;color:#fff}
.result-note{margin:14px 0 0;opacity:.82}
.dynamic-rows{display:grid;gap:12px;margin-bottom:14px}
.input-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) 42px;gap:12px;align-items:end;padding:14px;border:1px solid var(--line);border-radius:14px;background:var(--canvas)}
.row-remove{width:42px;height:44px;border:1px solid #e3c2c2;border-radius:10px;background:#fff;color:var(--danger);font-size:1.4rem}
.add-row{margin:2px 0 4px}
.check-field{display:flex;align-items:center;gap:10px;margin-top:16px;font-weight:700;color:var(--brand)}
.check-field input{width:18px;height:18px;margin:0}
.all-tools-section{padding-bottom:72px}
.all-tools-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:24px}
.all-tools-grid .tool-card h2{font-size:1.25rem}
.home-tools{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:960px){.all-tools-grid,.home-tools{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.input-row,.all-tools-grid,.home-tools{grid-template-columns:1fr}.row-remove{width:100%}}

/* v1.0 launch components */
.field-group{display:contents}.static-field{border:1px solid var(--line);border-radius:11px;padding:13px 14px;background:var(--canvas);min-height:48px}.table-wrap{overflow:auto;margin-top:20px;border:1px solid rgba(255,255,255,.2);border-radius:12px}table{width:100%;border-collapse:collapse;min-width:560px}th,td{text-align:right;padding:11px 12px;border-bottom:1px solid rgba(255,255,255,.16);white-space:nowrap}th:first-child,td:first-child{text-align:left}thead{background:rgba(255,255,255,.1)}.result-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}.result-actions button{border:1px solid rgba(255,255,255,.35);background:transparent;color:#fff;border-radius:10px;padding:9px 12px;font-weight:750}.result-actions button:hover{background:rgba(255,255,255,.1)}.calculator-card{scroll-margin-top:90px}.tool-search{max-width:820px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow)}.tool-search label{display:block;margin-bottom:7px}.filter-buttons{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}.filter-buttons button{border:1px solid var(--line);background:#fff;color:var(--brand);border-radius:999px;padding:8px 12px;font-weight:750}.filter-buttons button.is-active{background:var(--brand);color:#fff}.empty-state{text-align:center;padding:40px;color:var(--muted)}.science-keys{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px}.science-keys button{border:1px solid var(--line);background:var(--canvas);border-radius:10px;padding:10px;font-weight:750;color:var(--brand)}.zodiac-wheel{position:relative;width:210px;height:210px;border:10px solid rgba(255,255,255,.22);border-radius:50%;margin:24px auto 0;background:repeating-conic-gradient(rgba(255,255,255,.16) 0 1deg,transparent 1deg 30deg)}.zodiac-wheel:after{content:'';position:absolute;inset:48%;border-radius:50%;background:#fff}.zodiac-marker{position:absolute;left:calc(50% - 13px);top:calc(50% - 13px);width:26px;height:26px;display:grid;place-items:center;border-radius:50%;background:#fff;color:var(--brand);font-weight:900;transform-origin:13px 101px}.inline-link{display:inline!important}.notice+.content-card{margin-top:20px}.notice{margin:20px 0}.home-tools .tool-card h2{font-size:1.08rem}.category-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.primary-nav{flex-wrap:wrap}.calculator-shell .keypad .wide{grid-column:span 2}
@media(max-width:760px){.science-keys{grid-template-columns:repeat(4,1fr)}.result-actions button{flex:1}.category-grid{grid-template-columns:1fr}.tool-search{padding:16px}}
@media print{.site-header,.site-footer,.breadcrumbs,.page-hero,.sticky-aside,.content-card:not(.calculator-card),.hero-actions,.result-actions,.calc-message{display:none!important}.content-grid{display:block}.calculator-card{border:0;box-shadow:none}.result-box{color:#000;background:#fff;border:1px solid #000}.result-item{border-color:#777;background:#fff}body{background:#fff}}