:root{--brand-primary:#FF6A13;--brand-primary-dark:#9D3F09;--brand-primary-light:#FFD8C2;--brand-secondary:#1F1F1F;--brand-accent:#FFC107;--brand-text:#1A202C;--brand-text-secondary:#5A5A5A;--brand-text-inverse:#FFFFFF;--brand-bg:#FFFFFF;--brand-bg-alt:#F6F2EF;--brand-border:#E2E8F0;--brand-success:#22C55E;--brand-warning:#F59E0B;--brand-danger:#EF4444;--brand-radius:0}*{box-sizing:border-box}body{margin:0;color:#1a202c;color:var(--brand-text);background:#fff;background:var(--brand-bg);font-family:Arial,Helvetica,sans-serif;line-height:1.65}a{color:#9d3f09;color:var(--brand-primary-dark);-webkit-text-decoration:none;text-decoration:none}a:hover{color:#ff6a13;color:var(--brand-primary)}img{max-width:100%;height:auto}.section-pad{padding:82px 0}.eyebrow{margin-bottom:12px;color:#9d3f09;color:var(--brand-primary-dark);font-size:.78rem;font-weight:700;letter-spacing:0;text-transform:uppercase}h1,h2,h3{color:#1a202c;color:var(--brand-text);letter-spacing:0}h1{font-size:max(2rem, min(4vw, 4rem));line-height:1.05;font-weight:800}h2{font-size:max(1.6rem, min(2.6vw, 2.6rem));line-height:1.15;font-weight:800}h3{font-size:1.15rem;font-weight:800}.section-heading{max-width:760px;margin-bottom:38px}.section-heading.centered{margin-right:auto;margin-left:auto;text-align:center}.osra-utility-bar{min-height:32px;padding:7px 0;color:rgba(255,255,255,.78);background:#9d3f09;background:var(--brand-primary-dark);font-size:.78rem}.osra-navbar{min-height:72px;background:#fff;background:var(--brand-bg);border-bottom:1px solid #e2e8f0;border-bottom:1px solid var(--brand-border)}.brand-logo{display:block;width:180px;height:40px;-o-object-fit:contain;object-fit:contain;background:linear-gradient(90deg,#ff6a13 0 34%,#1f1f1f 34% 100%);background:linear-gradient(90deg,var(--brand-primary) 0,var(--brand-primary) 34%,var(--brand-secondary) 34%,var(--brand-secondary) 100%)}@supports (background:linear-gradient(red 0%,red 0% 1%,red 2%)){.brand-logo{background:linear-gradient(90deg,var(--brand-primary) 0 34%,var(--brand-secondary) 34% 100%)}}.navbar-toggler{border-radius:0;border-radius:var(--brand-radius)}.navbar-nav .nav-link{color:#1a202c;color:var(--brand-text);font-weight:700;font-size:.92rem}.navbar-nav .nav-link:hover{color:#ff6a13;color:var(--brand-primary)}.osra-btn-cta,.osra-btn-primary{color:#fff;color:var(--brand-text-inverse);background:#ff6a13;background:var(--brand-primary);border:1px solid #ff6a13;border:1px solid var(--brand-primary);border-radius:0;border-radius:var(--brand-radius);font-weight:800;padding:12px 20px}.osra-btn-cta:hover,.osra-btn-primary:hover{color:#fff;color:var(--brand-text-inverse);background:#9d3f09;background:var(--brand-primary-dark);border-color:#9d3f09;border-color:var(--brand-primary-dark)}.osra-btn-outline{color:#9d3f09;color:var(--brand-primary-dark);background:0 0;border:1px solid #9d3f09;border:1px solid var(--brand-primary-dark);border-radius:0;border-radius:var(--brand-radius);font-weight:800;padding:12px 20px}.osra-btn-outline:hover{color:#fff;color:var(--brand-text-inverse);background:#9d3f09;background:var(--brand-primary-dark)}.compact-header,.page-hero{padding:78px 0;background:#f6f2ef;background:var(--brand-bg-alt);border-bottom:1px solid #e2e8f0;border-bottom:1px solid var(--brand-border)}.compact-header p,.page-hero p{max-width:820px;color:#5a5a5a;color:var(--brand-text-secondary);font-size:1.06rem}.page-hero.slim{padding:58px 0}.blog-card,.calc-grid article,.case-grid article,.catalog-card,.contact-grid article,.fact-grid article,.form-panel,.product-card,.simple-rows article,.six-grid article{background:#fff;background:var(--brand-bg);border:1px solid #e2e8f0;border:1px solid var(--brand-border);border-radius:0;border-radius:var(--brand-radius)}.osra-footer{padding:36px 0 24px;color:#fff;color:var(--brand-text-inverse);background:#1f1f1f;background:var(--brand-secondary)}.osra-footer h3{color:#fff;color:var(--brand-text-inverse);font-size:1rem}.footer-links{padding:0;margin:0;list-style:none}.footer-links li{margin:8px 0}.footer-links a{color:rgba(255,255,255,.76)}.footer-links a:hover{color:#ffc107;color:var(--brand-accent)}.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:30px;padding-top:18px;border-top:1px solid rgba(255,255,255,.16);color:rgba(255,255,255,.7);font-size:.9rem}.check-list{display:grid;grid-gap:12px;gap:12px;padding:0;margin:24px 0 0;list-style:none}.check-list li{padding-left:28px;position:relative}.check-list li::before{content:"";position:absolute;left:0;top:9px;width:12px;height:12px;background:#ffc107;background:var(--brand-accent)}@media (max-width:991px){.section-pad{padding:58px 0}.osra-utility-bar{display:none}.navbar-collapse{padding:18px 0}}@media (max-width:575px){h1{font-size:2.1rem}.footer-bottom{display:block}}.feedback-form .form-label{color:#1a202c;color:var(--brand-text);font-weight:700;font-size:.88rem}.feedback-form .form-control{border:1px solid #e2e8f0;border:1px solid var(--brand-border);border-radius:0;border-radius:var(--brand-radius);min-height:46px}.feedback-form textarea.form-control{min-height:118px}.feedback-form .form-control:focus{border-color:#ff6a13;border-color:var(--brand-primary);box-shadow:0 0 0 .2rem rgba(255,106,19,.14)}.privacy-note{max-width:340px;color:#5a5a5a;color:var(--brand-text-secondary);font-size:.86rem}