*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:16px/1.65 Arial,sans-serif;color:#263d52;background:#fff}.wrap{width:min(1120px,92%);margin:auto}header{background:#fff;border-bottom:1px solid #dce7f0;position:sticky;top:0;z-index:5}.nav{min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:25px}.logo img{width:220px;max-height:64px;object-fit:contain}.nav nav{display:flex;gap:22px;flex-wrap:wrap}.nav a{text-decoration:none;color:#173e66;font-weight:700;font-size:14px}.hero{background:#f2f8fc;padding:70px 0}.hero-grid,.two{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center}.hero img{width:100%;height:380px;object-fit:cover;border-radius:8px;box-shadow:0 18px 45px #18312222}.eyebrow{font-size:12px;letter-spacing:.16em;color:#1381bb;font-weight:800}h1,h2,h3{font-family:Georgia,serif;color:#0d4f8b}h1{font-size:50px;line-height:1.08;margin:10px 0 20px}h2{font-size:35px;line-height:1.2}h3{font-size:22px}.lead{font-size:19px;color:#4d6173}.btn{display:inline-block;background:#087fbd!important;color:#fff!important;padding:13px 21px;border-radius:4px;text-decoration:none;font-weight:800}.section{padding:70px 0}.soft{background:#f4f8fb}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{border:1px solid #d9e5ee;border-radius:7px;padding:24px;background:#fff}.product-art{height:180px;background:linear-gradient(145deg,#f0f8fd,#d7edf8);display:flex;flex-direction:column;align-items:center;justify-content:center;border-radius:5px;color:#145c91;font-weight:800}.product-art strong{font-size:46px}.product-art small{letter-spacing:.1em}.card a{font-weight:800;color:#0878b3}.buy{background:#fff;border-left:5px solid #1381bb;padding:22px;margin:25px 0;display:flex;align-items:center;justify-content:space-between;gap:25px}.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:20px 0}.facts div{padding:12px;background:#f2f8fc;border:1px solid #dbe8f0}.article{width:min(820px,92%);margin:auto;padding:60px 0}.article h1{font-size:42px}.article img{max-width:100%}.article li{margin:.35em 0}.breadcrumbs{font-size:13px;margin-bottom:20px}.faq details{padding:15px 18px;background:#fff;border:1px solid #d9e5ee;margin:10px 0}.cta{background:#0b6fa8;color:#fff;padding:45px 0}.cta h2{color:#fff}footer{background:#103550;color:#cbd6cf;padding:38px 0;text-align:center}.note{font-size:12px;color:#7a837c}.product-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}@media(max-width:800px){.nav{display:block;padding:15px 0}.nav nav{margin-top:10px;gap:12px}.hero-grid,.two,.cards,.product-grid{grid-template-columns:1fr}.hero{padding:45px 0}.hero img{height:280px}h1{font-size:38px}h2{font-size:29px}.facts{grid-template-columns:1fr}.buy{align-items:flex-start;flex-direction:column}}
/* v2 blue-led PondBiotix palette and product-card overflow fix */
.product-art{padding:18px;text-align:center;overflow:hidden;min-width:0}
.product-art strong{font-size:clamp(26px,2.35vw,38px);line-height:1.08;max-width:100%;overflow-wrap:anywhere;word-break:normal}
.product-art small{color:#3f7b42;margin-bottom:8px}
.card{min-width:0}
.card h3{color:#0d4f8b}
.card a:hover,.nav a:hover{color:#1592c8}

/* v3 real product photography */
.product-photo-card{height:230px;background:#fff;display:flex;align-items:center;justify-content:center;border-radius:5px;overflow:hidden;padding:8px;margin-bottom:8px}
.product-photo-card img{width:100%;height:100%;object-fit:contain;display:block}
.product-photo-detail{height:500px;background:#fff;border:1px solid #d9e5ee;border-radius:8px;display:flex;align-items:center;justify-content:center;padding:18px;overflow:hidden}
.product-photo-detail img{width:100%;height:100%;object-fit:contain;display:block}
@media(max-width:800px){.product-photo-card{height:260px}.product-photo-detail{height:420px}}

/* v4 content architecture */
.cards.five{grid-template-columns:repeat(5,1fr)}
.cards.five .card{padding:18px}.cards.five .product-photo-card{height:190px}
.guide{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-top:28px}.guide-item{background:#fff;border:1px solid #d9e5ee;border-top:4px solid #1381bb;border-radius:6px;padding:18px}.guide-item b{color:#0d4f8b;display:block;margin-bottom:6px}.process{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.process>div{background:#fff;border:1px solid #d9e5ee;padding:24px;border-radius:7px}.callout{background:#edf7fb;border-left:5px solid #3f8b49;padding:22px 25px;margin:28px 0}.content-wide{width:min(980px,92%);margin:auto}.spec-table{width:100%;border-collapse:collapse;margin:24px 0}.spec-table th,.spec-table td{padding:12px 14px;border:1px solid #d8e5ed;text-align:left;vertical-align:top}.spec-table th{background:#edf6fb;color:#0d4f8b}.product-body{padding:55px 0}.product-body h2{margin-top:45px}.product-body h3{margin-top:30px}.kicker{font-weight:800;color:#3f7b42}.smallprint{font-size:14px;color:#5d6e7d}.related{display:flex;gap:14px;flex-wrap:wrap;margin-top:20px}.related a{background:#edf6fb;padding:10px 14px;border-radius:4px;text-decoration:none;font-weight:700;color:#0d4f8b}
@media(max-width:1000px){.cards.five,.guide{grid-template-columns:repeat(2,1fr)}}
@media(max-width:800px){.cards.five,.guide,.process{grid-template-columns:1fr}.cards.five .product-photo-card{height:260px}.spec-table{font-size:14px}}

/* v5 usability and comparison refinements */
.card-link{display:block;color:inherit!important;text-decoration:none;height:100%}.card-link:hover{color:inherit!important}.card-link .card{height:100%;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}.card-link:hover .card{transform:translateY(-2px);box-shadow:0 10px 28px #173e6618;border-color:#9cc9df}.card-link .text-link{font-weight:800;color:#0878b3}.product-group{margin-top:34px}.product-group>h2{margin-bottom:8px}.product-group>.group-intro{margin-top:0;color:#5d6e7d}.cards.three{grid-template-columns:repeat(3,1fr)}.cards.two{grid-template-columns:repeat(2,1fr);max-width:760px}.compare-card .product-photo-card{height:230px}.compare-card .quickfacts{margin:16px 0 18px;padding:0;list-style:none}.compare-card .quickfacts li{padding:7px 0;border-bottom:1px solid #edf2f5}.compare-card .quickfacts b{color:#0d4f8b}.faq details{border-radius:6px}.faq summary{cursor:pointer;font-family:Georgia,serif;font-size:19px;font-weight:700;color:#0d4f8b}.faq details p{margin-bottom:4px}.faq-intro{max-width:820px}.faq-section{margin-top:38px}.faq-section h2{font-size:28px}.section-divider{height:1px;background:#dce7f0;margin:42px 0}
@media(max-width:900px){.cards.three,.cards.two{grid-template-columns:1fr;max-width:none}}
.buy-action{display:flex;flex-direction:column;align-items:center;gap:7px;min-width:255px}.buy-btn{padding:15px 25px!important;border-radius:6px;box-shadow:0 5px 14px rgba(8,127,189,.22);transition:transform .15s ease,box-shadow .15s ease}.buy-btn:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(8,127,189,.28)}.checkout-note{font-size:12px;color:#66798a;text-align:center}@media(max-width:800px){.buy-action{align-items:flex-start;min-width:0}.checkout-note{text-align:left}}