:root { 
            --primary: #0D7685; 
            --primary-dark: #e85a2a;
            --dark: #212529; 
        }
        
        body { 
            font-family: 'Segoe UI', system-ui, sans-serif;
            background-image: url('https://images.unsplash.com/photo-1586528116311-ad8dd3c8310d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            background-repeat: no-repeat;
            position: relative;
            min-height: 100vh;
            padding-top: 80px; /* Add padding to prevent content from hiding under fixed navbar */
        }
        
        /* Optional overlay to make content more readable */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.9);
            z-index: -1;
        }
        
        /* Fixed Navbar Styles */
        .navbar {
            background: rgba(255, 255, 255, 0.95) !important;
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.1);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            padding: 15px 0;
            transition: all 0.3s ease;
        }
        
        /* Navbar shrink effect on scroll */
        .navbar.navbar-shrink {
            padding: 8px 0;
            background: rgba(255, 255, 255, 0.98) !important;
            box-shadow: 0 5px 30px rgba(0,0,0,0.15);
        }
        
        .navbar-brand img { 
            height: 50px;
            transition: all 0.3s ease;
        }
        
        .navbar-shrink .navbar-brand img {
            height: 40px;
        }
        
        .track-card { 
            background: rgba(255, 255, 255, 0.95); 
            border-radius: 15px; 
            padding: 30px; 
            margin: 30px 0; 
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            backdrop-filter: blur(5px);
        }
        
        .btn-track { 
            background: var(--primary); 
            color: white; 
            padding: 12px 30px; 
            border: none; 
            border-radius: 8px; 
            font-weight: 600; 
            transition: all 0.3s ease;
        }
        .btn-track:hover { 
            background: var(--primary-dark); 
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(255, 107, 53, 0.3);
        }
        .status-badge { 
            padding: 5px 15px; 
            border-radius: 20px; 
            background: #fff1e6; 
            color: var(--primary); 
            font-weight: 600; 
        }
        .timeline-item { 
            padding: 15px; 
            border-left: 3px solid var(--primary); 
            margin-bottom: 15px; 
            background: white; 
            border-radius: 0 8px 8px 0; 
            transition: all 0.3s ease;
        }
        .timeline-item:hover {
            transform: translateX(5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .footer { 
            background: var(--dark); 
            color: white; 
            padding: 40px 0 20px; 
            margin-top: 50px; 
        }
        .footer a { 
            color: #ccc; 
            text-decoration: none; 
            transition: color 0.3s ease;
        }
        .footer a:hover { 
            color: var(--primary); 
            padding-left: 5px;
        }
        .input-error { 
            border-color: #dc3545 !important; 
        }
        .error-message { 
            color: #dc3545; 
            font-size: 0.875rem; 
            margin-top: 5px; 
        }
        .text-primary { 
            color: var(--primary) !important; 
        }
        .bg-primary { 
            background-color: var(--primary) !important; 
        }
        .btn-outline-secondary {
            transition: all 0.3s ease;
        }
        .btn-outline-secondary:hover {
            background-color: var(--primary);
            border-color: var(--primary);
            color: white;
            transform: translateY(-2px);
        }
        .nav-link {
            position: relative;
            transition: all 0.3s ease;
            margin: 0 5px;
        }
        .nav-link.active {
            color: var(--primary) !important;
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 30px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .nav-link:hover {
            color: var(--primary) !important;
            transform: translateY(-2px);
        }
        .input-group-text i {
            color: var(--primary) !important;
        }
        
        /* Make cards slightly transparent to show background */
        .card {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(5px);
            border: none;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        
        .card-header {
            border-bottom: none;
        }
        
        /* Scroll to top button */
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            border: none;
            box-shadow: 0 5px 20px rgba(255, 107, 53, 0.3);
            z-index: 1020;
        }
        
        .scroll-top.show {
            opacity: 1;
            visibility: visible;
        }
        
        .scroll-top:hover {
            background: var(--primary-dark);
            transform: translateY(-5px);
        }
        
        @media (max-width: 768px) { 
            body {
                padding-top: 70px;
            }
            
            .track-card { 
                padding: 20px; 
            }
            
            .navbar-brand img {
                height: 40px;
            }
            
            .navbar-shrink .navbar-brand img {
                height: 35px;
            }
            
            .scroll-top {
                bottom: 20px;
                right: 20px;
                width: 40px;
                height: 40px;
            }
        }