/* --- BRAND COLORS --- */
 :root {
   --brand-red: #c52f33;
   --brand-red-hover: #9e1c22;
   --brand-silver: #e6e7e8;
   --brand-dark: #212529;
   --brand-gray: #6c757d;
 }

 body {
   font-family: "Roboto", sans-serif;
   color: #444;
   overflow-x: hidden;
   padding-top: 76px;
   /* Offset for fixed navbar */
 }

 /* --- NAVIGATION --- */
 .navbar {
   background-color: #fff;
   box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
   padding: 10px 0;
   transition: all 0.3s ease;
   border-bottom: 3px solid var(--brand-red);
   /* Red bottom border */
 }

 .navbar-brand img {
   height: 50px;
   width: auto;
 }

 .nav-link {
   text-transform: uppercase;
   font-weight: 700;
   color: var(--brand-dark) !important;
   margin-left: 15px;
   font-size: 0.9rem;
   transition: color 0.3s;
   position: relative;
 }

 /* Red underline for active nav-link */
 .nav-link.active::after {
   content: "";
   position: absolute;
   bottom: -5px;
   left: 0;
   width: 100%;
   height: 3px;
   background-color: var(--brand-red);
   border-radius: 2px;
 }

 .nav-link:hover {
   color: var(--brand-red) !important;
 }

 /* --- HERO SECTION --- */
 /* #home {
        position: relative;
        height: 100vh;
        min-height: 600px;
        background:
          linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
          url("https://images.unsplash.com/photo-1605218427306-635ba243971c?q=80&w=1920&auto=format&fit=crop");
        background-size: cover;
        background-position: center;
        display: flex;
        align-items: center;
        color: white;
        margin-top: -76px;
      } */

 .hero-title {
   font-size: 3.5rem;
   font-weight: 900;
   text-transform: uppercase;
   letter-spacing: 2px;
   margin-bottom: 1.5rem;
 }

 .btn-brand {
   background-color: var(--brand-red);
   color: white;
   padding: 12px 35px;
   font-weight: 700;
   text-transform: uppercase;
   border-radius: 4px;
   border: none;
   transition: all 0.3s;
 }

 .btn-brand:hover {
   background-color: var(--brand-red-hover);
   color: white;
   transform: translateY(-2px);
 }

 .hero-img-wrapper {
   position: relative;
   width: 100%;
   height: calc(100vh - 76px);
   /* desktop */
   margin-top: 0.4rem;
   overflow: hidden;
 }

 .hero-img-wrapper img {
   width: 100%;
   height: 100%;
   object-fit: cover;
   /* KEY */
   object-position: center;
 }

 /* --- SECTION FADE-IN ANIMATIONS --- */
 .fade-section {
   opacity: 0;
   transform: translateY(30px);
   transition:
     opacity 0.8s ease-out,
     transform 0.8s ease-out;
 }

 .fade-section.visible {
   opacity: 1;
   transform: translateY(0);
 }

 /* --- GENERAL SECTIONS --- */
 .section-padding {
   padding: 80px 0;
 }

 .section-title {
   text-align: center;
   margin-bottom: 60px;
   position: relative;
 }

 .section-title h2 {
   font-size: 1.3em;
   font-weight: 900;
   text-transform: uppercase;
   display: inline-block;
   padding-bottom: 10px;
   color: var(--brand-dark);
 }

 .section-title h2::after {
   content: "";
   display: block;
   width: 60px;
   height: 4px;
   background-color: var(--brand-red);
   margin: 10px auto 0;
 }

 /* --- ABOUT & FEATURES --- */
 .feature-box {
   background: #f8f9fa;
   padding: 30px;
   border-left: 5px solid var(--brand-red);
   height: 100%;
   transition: transform 0.3s;
 }

 .feature-box:hover {
   transform: translateY(-5px);
   box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
 }

 /* --- PRODUCT CARDS --- */
 .product-card {
   border: 1px solid #e0e0e0;
   border-radius: 8px;
   overflow: hidden;
   background: #fff;
   transition: all 0.3s ease;
   position: relative;
   height: 100%;
   display: flex;
   flex-direction: column;
 }

 .product-card:hover {
   box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
   border-color: var(--brand-red);
   transform: translateY(-5px);
 }

 .card-img-wrapper {
   height: 220px;
   background-color: #f1f1f1;
   display: flex;
   align-items: center;
   justify-content: center;
   overflow: hidden;
 }

 .card-img-wrapper img {
   max-width: 90%;
   max-height: 90%;
   object-fit: contain;
   transition: transform 0.5s;
 }

 .product-card:hover .card-img-wrapper img {
   transform: scale(1.05);
 }

 .card-body {
   padding: 20px;
   flex-grow: 1;
   text-align: center;
 }

 .card-title {
   font-weight: 700;
   font-size: 1.1rem;
   margin-bottom: 15px;
   color: var(--brand-dark);
 }

 .pdf-btn {
   font-size: 0.85rem;
   color: var(--brand-red);
   border: 1px solid var(--brand-red);
   padding: 6px 15px;
   border-radius: 50px;
   text-decoration: none;
   transition: all 0.3s;
   display: inline-block;
 }

 .product-card:hover .pdf-btn {
   background-color: var(--brand-red);
   color: white;
 }

 /* --- FOOTER --- */
 footer {
   background-color: #c52f33;
   color: #fff;
   padding: 50px 0 20px;
 }

 footer h5 {
   color: white;
   text-transform: uppercase;
   font-weight: 700;
   margin-bottom: 20px;
 }

 footer ul li {
   margin-bottom: 10px;
 }

 .footer-bottom {
   margin-top: 40px;
   padding-top: 20px;
   border-top: 1px solid #fff;
   text-align: center;
   font-size: 0.85rem;
 }

 /* --- BACK TO TOP BUTTON --- */
 #backToTop {
   position: fixed;
   bottom: 30px;
   right: 30px;
   background-color: var(--brand-red);
   color: white;
   border: none;
   border-radius: 50%;
   width: 50px;
   height: 50px;
   font-size: 24px;
   cursor: pointer;
   display: none;
   box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
   z-index: 1000;
   transition:
     background-color 0.3s,
     transform 0.3s;
 }

 #backToTop:hover {
   background-color: var(--brand-red-hover);
   transform: translateY(-3px);
 }

 /* --- MOBILE TWEAKS --- */
 @media (max-width: 768px) {
   .hero-img-wrapper {
     height: auto;
     /* let image define height */
     margin-top: 0.4rem;
   }

   .hero-img-wrapper img {
     width: 100%;
     height: auto;
     /* maintain aspect ratio */
     object-fit: contain;
     /* no cropping on mobile */
   }

   .hero-title {
     font-size: 2rem;
   }

   .section-title h2 {
     font-size: 1.8rem;
   }
 }