body {
            background-color: #f8fafc;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
        }
        .navbar {
            background-color: #ffffff;
            border-bottom: 1px solid #e2e8f0;
        }
        .nav-link {
            font-size: 0.875rem;
            font-weight: 600;
            color: #475569 !important;
            transition: color 0.2s;
        }
        .nav-link:hover, .nav-link.active {
            color: #dc3545 !important;
        }
        .logo-box {
            background-color: #dc3545;
            color: white;
            padding: 6px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .hero-section {
            background-color: #ffffff;
            border-bottom: 1px solid #f1f5f9;
            padding: 30px 0;
        }
        .tool-card {
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 24px;
            padding: 20px;
            text-decoration: none;
            transition: all 0.3s ease;
            height: 100%;
            display: block;
        }
        .tool-card:hover {
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            transform: translateY(-4px);
        }
        .icon-box {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            transition: transform 0.3s;
        }
        .tool-card:hover .icon-box {
            transform: scale(1.1);
        }
        .bg-blue-soft { background-color: #eff6ff; color: #2563eb; }
        .bg-purple-soft { background-color: #faf5ff; color: #9333ea; }
        .bg-orange-soft { background-color: #fff7ed; color: #ea580c; }
        .bg-green-soft { background-color: #edfff0; color: #30a317; }
        .bg-red-soft { background-color: #fff6f5; color: #eb4325; }
        .bg-yellow-soft { background-color: #fffdf5; color: #ebc725; }
        
        .placeholder-card {
            border: 2px dashed #e2e8f0;
            background-color: rgba(248, 250, 252, 0.5);
            border-radius: 24px;
            padding: 40px;
            height: 100%;
        }
        footer {
            background-color: #ffffff;
            border-top: 1px solid #e2e8f0;
        }