:root {
            --primary-color: #3cb043;
            --secondary-color: #2b78e4;
            --dark-color: #072e75;
            --text-dark: #334155;
            --text-gray: #64748b;
            --light-bg: #f9f9f9;
            --white: #ffffff;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Plus Jakarta Sans', 'Nunito', -apple-system, BlinkMacSystemFont, sans-serif;
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
            background: var(--white);
        }

        /* ============================================
           BREADCRUMB SECTION
        ============================================ */
        .breadcumb-wrapper {
            background-size: cover; 
            background-position: center; 
            background-repeat: no-repeat; 
            width: 100%; 
            padding: 100px 0;
            display: flex; 
            align-items: center; 
            justify-content: center;
            text-align: center;
            color: #fff;
            position: relative;
        }

        .breadcumb-wrapper::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 1;
        }

        .breadcumb-content {
            position: relative;
            z-index: 2;
        }

        .breadcumb-title {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 15px;
            letter-spacing: -0.5px;
        }

        .breadcumb-subtitle {
            font-size: 18px;
            max-width: 700px;
            margin: 10px auto;
            line-height: 1.6;
            opacity: 0.9;
        }

        .breadcumb-menu {
            list-style: none;
            padding: 0;
            margin: 20px 0 0;
        }

        .breadcumb-menu li {
            display: inline;
            margin: 0 8px;
        }

        .breadcumb-menu li a {
            color: #fff;
            text-decoration: none;
            transition: var(--transition-smooth);
        }

        .breadcumb-menu li a:hover {
            color: var(--primary-color);
        }

        /* ============================================
           CASE STUDIES SECTION
        ============================================ */
        .case-area {
            padding: 100px 0;
            background: var(--light-bg);
        }

        .section-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 60px;
        }

        .sub-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary-color);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 15px;
            display: block;
        }

        .sec-title {
            font-size: 42px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--dark-color);
            letter-spacing: -0.5px;
            line-height: 1.2;
        }

        /* ============================================
           FILTER BUTTONS
        ============================================ */
        .case-menu {
            margin-bottom: 50px;
            text-align: center;
        }

        .case4-btn {
            background: var(--white);
            border: 1px solid var(--border-color, #e2e8f0);
            color: var(--text-gray);
            font-size: 14px;
            font-weight: 500;
            padding: 10px 22px;
            margin: 5px;
            border-radius: 25px;
            transition: var(--transition-smooth);
            cursor: pointer;
            font-family: inherit;
        }

        .case4-btn:hover,
        .case4-btn.active {
            background: var(--primary-color);
            color: var(--white);
            border-color: var(--primary-color);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(60, 176, 67, 0.2);
        }

        /* ============================================
           CASE STUDY CARDS
        ============================================ */
        .case-box.style2.inner-style1 {
            min-height: 420px;
            position: relative;
            overflow: hidden;
            border-radius: 16px;
            box-shadow: var(--shadow-md);
            transition: var(--transition-smooth);
            background: var(--white);
            margin-bottom: 30px;
        }

        .case-box.style2.inner-style1:hover {
            box-shadow: var(--shadow-xl);
            transform: translateY(-8px);
        }

        .case-img {
            position: relative;
            overflow: hidden;
            height: 280px;
        }

        .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-smooth);
        }

        .case-box:hover .case-img img {
            transform: scale(1.08);
        }

        .icon-btn {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 44px;
            height: 44px;
            background: var(--primary-color);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transform: translateY(10px);
            transition: var(--transition-smooth);
            z-index: 3;
            text-decoration: none;
            font-size: 18px;
        }

        .case-box:hover .icon-btn {
            opacity: 1;
            transform: translateY(0);
        }

        .icon-btn:hover {
            background: var(--white);
            color: var(--primary-color);
            transform: rotate(45deg) scale(1.1);
        }

        .case-content {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.85), transparent);
            color: var(--white);
            padding: 25px;
            transition: var(--transition-smooth);
            z-index: 2;
        }

        .case-box:hover .case-content {
            background: linear-gradient(to top, rgba(60, 176, 67, 0.9), transparent);
        }

        .box-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.3;
        }

        .box-title a {
            color: var(--white);
            text-decoration: none;
            transition: var(--transition-smooth);
        }

        .box-title a:hover {
            color: var(--white);
            opacity: 0.9;
        }

        .case-subtitle {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.9);
            font-weight: 500;
            letter-spacing: 0.5px;
        }

        /* ============================================
           SCROLL TO TOP
        ============================================ */
        .scroll-top {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            border-radius: 50%;
            cursor: pointer;
            display: none;
            z-index: 1000;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            transition: var(--transition-smooth);
        }

        .scroll-top:hover {
            background: var(--dark-color);
            transform: translateY(-3px) scale(1.1);
        }

        .scroll-top svg {
            width: 100%;
            height: 100%;
        }

        /* ============================================
           RESPONSIVE DESIGN
        ============================================ */
        @media (max-width: 1200px) {
            .case-box.style2.inner-style1 {
                min-height: 380px;
            }
            
            .case-img {
                height: 250px;
            }
        }

        @media (max-width: 992px) {
            .breadcumb-title {
                font-size: 36px;
            }
            
            .sec-title {
                font-size: 36px;
            }
            
            .case-area {
                padding: 80px 0;
            }
            
            .breadcumb-wrapper {
                padding: 80px 0;
            }
        }

        @media (max-width: 768px) {
            .breadcumb-title {
                font-size: 32px;
            }
            
            .breadcumb-subtitle {
                font-size: 16px;
                max-width: 90%;
            }
            
            .sec-title {
                font-size: 28px;
            }
            
            .case-box.style2.inner-style1 {
                min-height: 350px;
            }
            
            .case-img {
                height: 220px;
            }
            
            .case-content {
                padding: 20px;
            }
            
            .box-title {
                font-size: 18px;
            }
            
            .case-menu {
                overflow-x: auto;
                white-space: nowrap;
                padding-bottom: 10px;
                -webkit-overflow-scrolling: touch;
            }
            
            .case4-btn {
                padding: 8px 18px;
                font-size: 13px;
            }
        }

        @media (max-width: 576px) {
            .breadcumb-title {
                font-size: 28px;
            }
            
            .breadcumb-subtitle {
                font-size: 15px;
                max-width: 95%;
            }
            
            .breadcumb-wrapper {
                padding: 60px 0;
            }
            
            .case-area {
                padding: 60px 0;
            }
            
            .section-header {
                margin-bottom: 40px;
            }
            
            .case-box.style2.inner-style1 {
                min-height: 300px;
            }
            
            .case-img {
                height: 180px;
            }
            
            .case-content {
                padding: 15px;
            }
            
            .box-title {
                font-size: 16px;
            }
            
            .case-subtitle {
                font-size: 12px;
            }
            
            .icon-btn {
                width: 40px;
                height: 40px;
                font-size: 16px;
            }
        }

        /* ============================================
           GRID LAYOUT
        ============================================ */
        .grid {
            transition: height 0.4s ease;
        }

        .grid-item {
            margin-bottom: 30px;
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.4s ease, transform 0.4s ease;
        }

        .grid-item.show {
            opacity: 1;
            transform: translateY(0);
        }

        /* ============================================
           ANIMATIONS
        ============================================ */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .fade-in {
            opacity: 0;
            transform: translateY(30px);
        }

        .fade-in.visible {
            animation: fadeInUp 0.6s ease-out forwards;
        }

        /* Desktop */
        .breadcumb-wrapper {
            height: 500px;
        }
        /* Tablet */
        @media (max-width: 992px) {
            .breadcumb-wrapper {
                height: 400px;
            }
        }
        /* Mobile */
        @media (max-width: 576px) {
            .breadcumb-wrapper {
                height: 300px;
            }
        }