.button-group {
            display: flex;
            gap: 5px;
            margin-top: 10px;
        }
        
        .line-btn {
            display: inline-block;
            padding: 12px 25px;
            text-decoration: none;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        
        .line-btn span {
            position: absolute;
            display: block;
        }
        
        .line-btn span:nth-child(1) {
            top: 0;
            left: -100%;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, #fff);
            transition: all 0.5s;
        }
        
        .line-btn:hover span:nth-child(1) {
            left: 100%;
        }
        
        .line-btn span:nth-child(2) {
            bottom: 0;
            right: -100%;
            width: 100%;
            height: 2px;
            background: linear-gradient(270deg, transparent, #fff);
            transition: all 0.5s;
            transition-delay: 0.2s;
        }
        
        .line-btn:hover span:nth-child(2) {
            right: 100%;
        }
        
        .line-btn span:nth-child(3) {
            top: -100%;
            right: 0;
            width: 2px;
            height: 100%;
            background: linear-gradient(180deg, transparent, #fff);
            transition: all 0.5s;
            transition-delay: 0.1s;
        }
        
        .line-btn:hover span:nth-child(3) {
            top: 100%;
        }
        
        .line-btn span:nth-child(4) {
            bottom: -100%;
            left: 0;
            width: 2px;
            height: 100%;
            background: linear-gradient(0deg, transparent, #fff);
            transition: all 0.5s;
            transition-delay: 0.3s;
        }
        
        .line-btn:hover span:nth-child(4) {
            bottom: 100%;
        }
        
        .line-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
        }

        /* Popup Overlay */
        .popup-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 99999;
            backdrop-filter: blur(8px);
        }
        
        /* Popup Box */
        .popup-box {
            background: #fff;
            width: 420px;
            max-width: 90%;
            padding: 0;
            border-radius: 20px;
            text-align: center;
            position: relative;
            animation: fadeInUp .4s ease;
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
            overflow: hidden;
        }
        
        .popup-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            padding: 30px 25px 25px;
            color: white;
            position: relative;
        }
        
        .popup-header h3 {
            margin-bottom: 8px;
            font-size: 26px;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        
        .popup-header p {
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 0;
            font-size: 15px;
        }
        
        .form-icon {
            width: 70px;
            height: 70px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            backdrop-filter: blur(10px);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        
        .form-icon svg {
            width: 32px;
            height: 32px;
        }
        
        /* Close Button */
        .close-popup {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 24px;
            cursor: pointer;
            color: white;
            font-weight: bold;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            background: rgba(255, 255, 255, 0.2);
        }
        
        .close-popup:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: rotate(90deg);
        }
        
        .popup-body {
            padding: 30px;
        }
        
        /* Inputs */
        .input-group {
            margin-bottom: 20px;
            text-align: left;
        }
        
        .input-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #2c3e50;
            font-size: 14px;
            padding-left: 5px;
        }
        
        .popup-box input {
            width: 100%;
            padding: 15px 20px;
            border: 2px solid #f1f3f6;
            border-radius: 12px;
            font-size: 16px;
            transition: all 0.3s ease;
            background: #f8f9fa;
            color: #2c3e50;
        }
        
        .popup-box input:focus {
            border-color: #667eea;
            outline: none;
            background: white;
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.1);
            transform: translateY(-2px);
        }
        
        .popup-box input::placeholder {
            color: #aab7c4;
        }
        
        /* Submit Button */
        .popup-box button {
            width: 100%;
            padding: 16px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #fff;
            border: none;
            border-radius: 12px;
            margin-top: 10px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.3s ease;
            letter-spacing: 0.5px;
            position: relative;
            overflow: hidden;
        }
        
        .popup-box button:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
        }
        
        .popup-box button:active {
            transform: translateY(-1px);
        }
        
        .popup-box button::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: 0.5s;
        }
        
        .popup-box button:hover::after {
            left: 100%;
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px) scale(0.95);
            }
        
            to {
                opacity: 1;
                transform: translateY(0) scale(1);
            }
        }
        
        @media (max-width: 480px) {
            .popup-box {
                width: 95%;
            }
        
            .button-group {
                flex-direction: column;
                align-items: center;
            }
        
            .line-btn {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
        
            .popup-body {
                padding: 25px 20px;
            }
        }