<style>



        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            overflow: hidden;
        }

        .slider {
            width: 100%;
            height: 100vh;
            position: relative;
            overflow: hidden;
        }

        .slide {
            width: 100%;
            height: 100%;
            position: absolute;
            top: 0;
            left: 0;
            opacity: 0;
            transition: opacity 0.5s ease-in-out;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .slide.active {
            opacity: 1;
        }

        /* تصاویر نمونه برای اسلایدر */
        .slide:nth-child(1) {
            background-image: url('./assets/imgs/background/slide2.png');
        }

        .slide:nth-child(2) {
            background-image: url('./assets/imgs/background/slide.gif');
        }

        .slide:nth-child(3) {
            background-image: url('./assets/imgs/background/petro2.png');
        }

        .slide:nth-child(4) {
            background-image: url('./assets/imgs/background/oil-gas.png');
        }

        /*.slide:nth-child (5){*/
        /*    background-image: url('./assets/imgs/background/slider5.png');*/
        /*}*/

        /* دکمه‌های ناوبری */
        .nav-btn {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            background: rgba(0, 0, 0, 0.5);
            color: white;
            border: none;
            padding: 15px;
            cursor: pointer;
            font-size: 24px;
            z-index: 10;
            transition: background 0.3s;
        }

        .nav-btn:hover {
            background: rgba(0, 0, 0, 0.8);
        }

        .prev {
            left: 20px;
        }

        .next {
            right: 20px;
        }

        /* استایل‌های ریسپانسیو */
        @media (max-width: 768px) {
            .nav-btn {
                padding: 10px;
                font-size: 18px;
            }

            .prev {
                left: 10px;
            }

            .next {
                right: 10px;
            }
        }

        @media (max-width: 480px) {
            .nav-btn {
                padding: 8px;
                font-size: 16px;
            }
        }
    </style>