:root{--bg:#f4f7fa;--navy:#123f63;--panel:#ffffff;--panel2:#e8f5fb;--blue:#159bd7;--cyan:#35bfe7;--text:#17344a;--muted:#607b8d;--line:#c8dbe6;--red:#ef3340;--shadow:0 14px 36px #17344a24}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"Segoe UI",Arial,sans-serif;line-height:1.55}a{color:inherit;text-decoration:none}.site-header{height:88px;display:flex;align-items:center;justify-content:space-between;padding:0 max(4vw,28px);border-bottom:1px solid var(--line);background:#174f78;position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:13px}.brand img{width:78px;height:72px;object-fit:contain;background:#fff;border-radius:0;padding:0}.brand strong{display:block;letter-spacing:.09em;font-size:14px}.brand small{display:block;color:#d9edf7;font-size:11px;letter-spacing:.08em}.site-header nav{display:flex;align-items:center;gap:28px;color:#f4fbff;font-size:14px}.site-header nav>a:hover,.nav-products:hover>span{color:var(--cyan)}.cart{border:1px solid var(--cyan);padding:8px 15px;border-radius:6px}.nav-products{position:relative;cursor:pointer;padding:30px 0}.dropdown{display:none;position:absolute;top:76px;left:-20px;background:#ffffff;border:1px solid var(--line);border-radius:8px;min-width:190px;box-shadow:var(--shadow);overflow:hidden}.dropdown a{display:block;padding:11px 18px}.dropdown a:hover{background:var(--panel2);color:#126f9d}.nav-products:hover .dropdown{display:block}.hero,.product-hero{padding:82px max(7vw,50px);display:grid;grid-template-columns:1.05fr .95fr;gap:62px;align-items:center;background:linear-gradient(118deg,#eef8fc 0,#ffffff 52%,#dff3fa 100%)}.hero{min-height:600px}.eyebrow{color:var(--cyan);font-weight:800;font-size:12px;letter-spacing:.2em;margin-bottom:10px}.brand-word{font-size:74px;line-height:.95;margin:8px 0 24px;font-weight:900;letter-spacing:-.05em}.brand-word span{color:#fff}.brand-word b{color:var(--red)}.brand-word.compact{font-size:42px;white-space:nowrap}.hero h2,.product-hero h2{font-size:30px;max-width:720px;margin:0 0 18px}.hero p,.product-hero p{color:var(--muted);font-size:17px;max-width:720px}.actions{display:flex;gap:12px;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;padding:12px 20px;border-radius:6px;font-weight:750;font-size:14px}.primary{background:var(--blue);color:#fff}.secondary{border:1px solid #4a7590;background:#0d2c43}.disabled{background:#294050;color:#8096a4;pointer-events:none}.hero-panel{background:linear-gradient(145deg,#1b628f,#123f63);border:1px solid #8bcce3;border-radius:18px;padding:34px;box-shadow:var(--shadow);text-align:center}.network-title{font-size:12px;letter-spacing:.18em;color:var(--cyan)}.network-core{margin:30px auto 0;border:1px solid var(--cyan);border-radius:10px;padding:20px;max-width:300px;font-size:27px;font-weight:800}.network-core small{display:block;font-size:10px;color:var(--muted);font-weight:600;margin-top:5px}.network-line{height:42px;width:1px;background:var(--cyan);margin:auto}.network-devices{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.network-devices span{background:#f5fbfd;border:1px solid var(--line);padding:15px 7px;border-radius:7px;font-size:13px}.nmea{margin-top:26px;border-top:3px solid var(--blue);padding-top:10px;color:var(--cyan);font-size:12px;letter-spacing:.16em}.section{padding:76px max(7vw,50px)}.section-heading{max-width:800px;margin-bottom:38px}.section h2,.split-section h2,.simple-page h2{font-size:34px;margin:4px 0 12px}.section-heading p,.split-section p,.simple-page p{color:var(--muted)}.product-grid,.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.product-card,.feature-grid article,.download-card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:25px}.product-card{transition:.2s}.product-card:hover{border-color:var(--cyan);transform:translateY(-2px)}.product-icon{font-size:31px;color:var(--cyan)}.product-card h3{font-size:22px;margin:13px 0 5px}.product-card p,.feature-grid p{color:var(--muted);min-height:74px}.product-card a{color:#087fae;font-weight:700}.band{padding:55px max(7vw,50px);background:#dff3fa;border-block:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.band>div{max-width:700px}.band h2{font-size:32px;margin:4px 0}.band p{color:var(--muted)}.product-hero{min-height:610px}.product-hero h1{font-size:66px;margin:4px 0;letter-spacing:-.045em}.product-hero h1 span{color:var(--blue)}.datasheet-preview{display:block;max-width:620px;justify-self:center;border:1px solid #4e7890;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);background:white}.datasheet-preview img{display:block;width:100%;height:auto}.feature-grid{grid-template-columns:repeat(3,1fr)}.feature-grid b{color:var(--cyan);font-size:11px;letter-spacing:.13em}.split-section{padding:70px max(7vw,50px);background:#eef7fb;display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.spec-card{border:1px solid var(--line);border-radius:10px;background:var(--panel);padding:25px}.spec-card h3{margin-top:0}.spec-card div{display:flex;justify-content:space-between;gap:20px;padding:12px 0;border-top:1px solid var(--line)}.spec-card span{color:var(--muted)}.spec-card strong{text-align:right}.order-table{border:1px solid var(--line);border-radius:8px;overflow:hidden}.tr{display:grid;grid-template-columns:1fr 1.25fr 2.3fr;padding:13px 18px;border-top:1px solid var(--line);background:#ffffff}.tr:first-child{border-top:0}.tr.head{background:#d8eef7;color:#155b7d;font-weight:800;font-size:12px;letter-spacing:.08em}.purchase-note{margin-top:22px;display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:20px}.purchase-note p{margin:4px 0;color:var(--muted)}.simple-page{min-height:620px;padding:90px max(10vw,60px)}.simple-page h1{font-size:52px;margin:5px 0}.downloads-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:1050px;margin-top:35px}.download-card{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:0}.download-card p{margin:3px 0}.muted{color:var(--muted)}code{color:var(--cyan)}footer{border-top:1px solid var(--line);padding:28px max(7vw,50px);display:grid;grid-template-columns:1.2fr 2fr 1fr;gap:30px;align-items:center;color:var(--muted);font-size:13px;background:#123f63}.footer-brand{display:flex;align-items:center;gap:12px}.footer-brand img{width:62px;height:60px;object-fit:contain;background:#fff;border-radius:0}.footer-brand strong{color:var(--text);font-size:11px}.makesense{font-weight:900}.makesense i{font-style:normal;color:#fff}.makesense{color:var(--red)}.footer-links{text-align:right}@media(max-width:900px){.site-header nav>a:not(.cart),.nav-products{display:none}.brand span{display:none}.hero,.product-hero,.split-section{grid-template-columns:1fr;padding:58px 25px}.hero h1,.brand-word{font-size:55px}.product-hero h1{font-size:54px}.product-grid,.feature-grid,.downloads-grid{grid-template-columns:1fr}.section{padding:58px 25px}.band{padding:42px 25px}.brand-word.compact{display:none}.tr{grid-template-columns:1fr}.tr span{padding:2px 0}.purchase-note{align-items:flex-start;flex-direction:column}footer{grid-template-columns:1fr}.footer-links{text-align:left}}

/* V0.4 datasheet-inspired marketing palette */
.hero .eyebrow,.product-hero .eyebrow{color:#1689b8}
.hero .brand-word span,.band .brand-word span{color:#174f78}
.hero h2,.product-hero h1,.product-hero h2,.section h2,.split-section h2,.simple-page h1,.simple-page h2{color:#17344a}
.hero-panel{color:#fff}
.hero-panel .network-core{color:#fff}
.hero-panel .network-core small{color:#d5eaf4}
.hero-panel .network-devices span{color:#174f78}
.hero-panel .network-title,.hero-panel .nmea{color:#67daf4}
.secondary{border:1px solid #7fb9d2;background:#fff;color:#174f78}
.product-card,.feature-grid article,.download-card,.spec-card,.purchase-note{box-shadow:0 5px 16px #17344a10}
.product-card h3,.feature-grid h3,.spec-card h3{color:#17344a}
.product-icon,.feature-grid b{color:#1689b8}
.band .eyebrow{color:#147da7}
.band h2{color:#17344a}
.product-hero{border-bottom:1px solid #c8dbe6}
.product-hero h1 span{color:#e4323b}
.datasheet-preview{border-color:#b7d3df}
.order-table{box-shadow:0 5px 16px #17344a10}
.tr.head{border-color:#b9d7e4}
footer{color:#d2e4ee}
footer .footer-brand strong{color:#fff}
footer .makesense i{color:#fff}
.dropdown{color:#17344a}
/* V0.5 commerce */
.dev-banner{background:#d71920;color:#fff;text-align:center;font-weight:800;letter-spacing:.08em;padding:.42rem 1rem;font-size:.78rem}.flash-wrap{max-width:1180px;margin:1rem auto 0;padding:0 1.25rem}.flash{padding:.8rem 1rem;border-radius:8px;background:#eaf6fb;border-left:4px solid #159fc5}.flash.error{border-color:#d71920}.flash.success{border-color:#1a8d67}.commerce-page{max-width:1120px;margin:0 auto;padding:3rem 1.25rem 5rem}.commerce-page.narrow{max-width:720px}.commerce-page h1{color:#123e69}.commerce-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}.commerce-card{background:#fff;border:1px solid #d9e5ec;border-radius:12px;padding:1.4rem;box-shadow:0 6px 20px rgba(12,61,93,.07)}.commerce-form{display:grid;gap:1rem}.commerce-form label,.buy-panel label{display:grid;gap:.35rem;font-weight:700;color:#234b68}.commerce-form input,.commerce-form select,.buy-panel input,.buy-panel select{font:inherit;padding:.72rem .8rem;border:1px solid #b9ccd8;border-radius:7px;background:#fff}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.account-head{display:flex;justify-content:space-between;align-items:start;gap:1rem}.order-row,.registered-row{display:grid;grid-template-columns:1fr 1.5fr auto;gap:1rem;padding:.8rem 0;border-bottom:1px solid #e3ebf0;text-decoration:none;color:#244b65}.cart-row{display:grid;grid-template-columns:1fr auto auto auto;gap:1rem;align-items:center;padding:1rem 0;border-bottom:1px solid #e3ebf0}.cart-row small{display:block;color:#668194;margin-top:.2rem}.cart-total{display:flex;justify-content:space-between;font-size:1.15rem;padding:1.2rem 0}.text-button{border:0;background:none;color:#c31d25;text-decoration:underline;cursor:pointer}.test-notice{background:#fff5e8;border-left:5px solid #e58a16;padding:1rem;margin:1rem 0 1.5rem;border-radius:6px}.paypal-disabled{width:100%;padding:.8rem;border:0;border-radius:7px;background:#d8dde1;color:#697781;font-weight:700}.buy-panel{max-width:1120px;margin:1rem auto 4rem;padding:1.5rem;display:flex;justify-content:space-between;align-items:end;gap:2rem;background:#eef8fb;border:1px solid #cfe6ef;border-radius:12px}.buy-panel form{display:flex;align-items:end;gap:.8rem}.buy-panel h2{margin-top:0;color:#123e69}@media(max-width:760px){.commerce-grid,.form-row{grid-template-columns:1fr}.cart-row{grid-template-columns:1fr auto}.buy-panel,.buy-panel form{display:grid;align-items:stretch}.account-head{display:block}}

/* V0.5.1 TankSense variant selector */
.variant-purchase{margin-top:30px;background:#fff;border:1px solid #cfe0e9;border-radius:14px;padding:28px;box-shadow:0 8px 24px #17344a12}.variant-purchase-head{display:flex;justify-content:space-between;gap:30px;align-items:start;margin-bottom:22px}.variant-purchase-head h2{margin:3px 0 5px}.variant-purchase-head p{margin:0;color:var(--muted)}.test-price{text-align:right;background:#fff5e8;border:1px solid #f0d2aa;border-radius:9px;padding:10px 15px;white-space:nowrap}.test-price small{display:block;font-size:10px;font-weight:800;color:#9a5a0b;letter-spacing:.08em}.test-price strong{display:block;font-size:24px;color:#17344a}.variant-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.variant-card{position:relative;display:flex;flex-direction:column;min-height:145px;padding:18px 16px;border:2px solid #c9dce6;border-radius:10px;background:#fafdff;cursor:pointer;transition:.16s}.variant-card:hover{border-color:#55badd;transform:translateY(-1px);box-shadow:0 5px 14px #17344a12}.variant-card input{position:absolute;opacity:0;pointer-events:none}.variant-card.selected{border-color:#159bd7;background:#e9f7fc;box-shadow:0 0 0 2px #159bd722}.variant-check{position:absolute;right:10px;top:9px;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:#159bd7;color:#fff;font-weight:900;opacity:0;transform:scale(.7);transition:.15s}.variant-card.selected .variant-check{opacity:1;transform:scale(1)}.variant-type{font-size:11px;font-weight:850;letter-spacing:.08em;color:#1689b8;text-transform:uppercase;padding-right:25px}.variant-card strong{font-size:16px;line-height:1.25;margin:10px 0 auto;color:#17344a}.variant-card small{margin-top:14px;color:#607b8d;font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.variant-order-bar{margin-top:20px;padding-top:20px;border-top:1px solid #d9e5ec;display:grid;grid-template-columns:1fr 100px auto;gap:18px;align-items:end}#tank-selection span,#tank-selection small{display:block;color:#607b8d}#tank-selection span{font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}#tank-selection strong{display:block;color:#17344a;margin:3px 0}.qty-field{display:grid;gap:5px;font-weight:700;color:#234b68}.qty-field input{width:100%;font:inherit;padding:10px;border:1px solid #b9ccd8;border-radius:7px}.variant-order-bar button:disabled{background:#a9bac4;color:#eef4f7;cursor:not-allowed}.variant-order-bar button:not(:disabled){cursor:pointer}@media(max-width:1000px){.variant-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:650px){.variant-grid{grid-template-columns:1fr}.variant-purchase-head{display:block}.test-price{margin-top:15px;text-align:left;display:inline-block}.variant-order-bar{grid-template-columns:1fr}.qty-field{max-width:120px}}

/* V0.5.2 SenseServer marketing page */
.ss-intro,.ss-capability,.ss-closing{padding:64px max(7vw,50px)}
.ss-intro{background:#e8f5fb;text-align:center}
.ss-intro h2,.ss-capability h2,.ss-closing h2{font-size:clamp(28px,3vw,40px);color:#17344a;margin:8px 0 16px}
.ss-intro p{max-width:790px;margin:0 auto;color:#45677e;font-size:18px}
.ss-jump{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:28px}
.ss-jump a{background:#fff;border:1px solid #a7d6e8;color:#13648d;padding:9px 15px;border-radius:7px;font-weight:700}
.ss-jump a:hover{background:#d1edf8}
.ss-capability{scroll-margin-top:105px}
.ss-tint{background:#eef8fc}
.ss-capability-heading{max-width:850px;margin-bottom:28px}
.ss-capability-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.ss-capability-grid article{background:white;border:1px solid #c8dbe6;border-radius:12px;padding:26px;box-shadow:0 6px 18px #17344a0c}
.ss-capability-grid span{font-size:11px;letter-spacing:.12em;color:#1689b8;font-weight:800}
.ss-capability-grid h3{font-size:21px;color:#17344a;margin:12px 0}
.ss-capability-grid p{color:#58778a;margin:0}
.ss-closing{background:#174f78;color:white;text-align:center}
.ss-closing h2{color:white}.ss-closing p{max-width:720px;margin:0 auto 20px;color:#e1eff6}
.ss-closing strong{font-size:21px}.ss-closing em{font-style:normal;color:#ef3340;font-weight:900}
@media(max-width:800px){.ss-intro,.ss-capability,.ss-closing{padding:48px 25px}.ss-capability-grid{grid-template-columns:1fr}}

/* V0.5.3 Live Demo links */
.site-header nav .nav-live-demo{color:#fff;border:1px solid #35bfe7;border-radius:6px;padding:8px 12px;font-weight:750;white-space:nowrap}
.site-header nav .nav-live-demo:hover{background:#35bfe7;color:#123f63}
.product-hero .actions{flex-wrap:wrap}
.demo-button{background:#ef3340;color:#fff;border:1px solid #ef3340}
.demo-button:hover{background:#d62030;color:#fff}