:root {
        --bg-portal: #f8fafc;
        --card-bg: #ffffff;
        --text-main: #0f172a;
        --brand-pink: #e2136e;
        --card-border: #e2e8f0;
        --card-border-hover: #cbd5e1;
    }

    body {
        background-color: var(--bg-portal) !important;
        font-family: 'Plus Jakarta Sans', 'SolaimanLipi', 'Hind Siliguri', sans-serif;
        color: var(--text-main);
        -webkit-font-smoothing: antialiased;
        margin: 0;
        padding: 0;
        user-select: none;
        -webkit-user-select: none;
    }

    .portal-container {
        width: 100%;
        max-width: 1400px;
        margin: 120px auto 60px;
        padding: 0 30px;
        box-sizing: border-box;
    }

    .portal-header {
        text-align: center;
        margin-bottom: 35px;
    }

    .portal-logo-container {
        margin-bottom: 20px;
        display: inline-block;
    }

    .portal-logo {
        max-width: 140px;
        height: auto;
        object-fit: contain;
        pointer-events: none;
    }

    .portal-header h1 {
        font-size: 38px;
        font-weight: 800;
        color: var(--text-main);
        letter-spacing: -0.5px;
        margin: 0;
    }

    /* ==========================================================
       SCALABLE FILTER WITH NEXT ARROW BUTTON
       ========================================================== */
    .filter-wrapper {
        position: relative;
        max-width: 1000px;
        margin: 0 auto 45px;
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .filter-container {
        display: flex;
        gap: 12px;
        overflow-x: auto;
        scroll-behavior: smooth;
        padding: 5px 0;
        width: 100%;
        white-space: nowrap;
        -ms-overflow-style: none;
        scrollbar-width: none;
    }

    .filter-container::-webkit-scrollbar {
        display: none;
    }

    .filter-btn {
        display: inline-block;
        background: #ffffff;
        border: 1px solid var(--card-border);
        padding: 10px 22px;
        border-radius: 30px;
        font-size: 14px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        color: var(--text-main);
        flex-shrink: 0;
    }

    .filter-btn:hover, .filter-btn.active {
        background: var(--brand-pink);
        color: #ffffff;
        border-color: var(--brand-pink);
        box-shadow: 0 4px 14px rgba(226, 19, 110, 0.25);
    }

    /* Next Arrow Button Style */
    .filter-next-btn {
        background: #ffffff;
        border: 1px solid var(--card-border);
        color: var(--text-main);
        width: 42px;
        height: 42px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        flex-shrink: 0;
        box-shadow: 0 4px 10px rgba(0,0,0,0.05);
        transition: all 0.2s ease;
    }

    .filter-next-btn:hover {
        background: var(--text-main);
        color: #ffffff;
        border-color: var(--text-main);
        transform: translateX(3px);
    }

    /* ==========================================
       Grid & Card Architecture
       ========================================== */
    .services-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }

    .service-card {
        background: var(--card-bg);
        border: 1px solid var(--card-border);
        border-radius: 16px;
        padding: 16px;
        display: flex;
        flex-direction: column;
        gap: 16px;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
    }

    .service-card.hide {
        display: none !important;
    }

    .service-card:hover {
        transform: translateY(-5px);
        border-color: var(--card-border-hover);
        box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 10px 10px -5px rgba(15, 23, 42, 0.03);
    }

    .service-img-wrapper {
        width: 100%;
        aspect-ratio: 16 / 9;
        border-radius: 12px;
        overflow: hidden;
        border: 1px solid var(--card-border);
        background-color: #f1f5f9;
    }

    .service-img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
        pointer-events: none;
    }

    .service-card:hover .service-img {
        transform: scale(1.05);
    }

    .service-title {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-main);
        margin: 0;
        line-height: 1.4;
        letter-spacing: -0.3px;
    }

    .btn-portal {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        background: var(--text-main);
        color: #ffffff;
        cursor: pointer;
        padding: 10px 16px;
        border-radius: 10px;
        font-weight: 600;
        font-size: 13.5px;
        align-self: flex-start;
        transition: all 0.2s ease;
        border: none;
    }

    .btn-portal:hover {
        background: var(--brand-pink);
        box-shadow: 0 4px 12px rgba(226, 19, 110, 0.2);
    }

    /* Responsive Design */
    @media (max-width: 1200px) { .services-grid { grid-template-columns: repeat(3, 1fr); } }
    @media (max-width: 992px) {
        .portal-container { margin-top: 100px; padding: 0 20px; }
        .services-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
        .portal-header h1 { font-size: 32px; }
    }
    @media (max-width: 576px) {
        .portal-container { margin-top: 90px; padding: 0 15px; }
        .portal-header { margin-bottom: 25px; }
        .portal-header h1 { font-size: 26px; }
        .services-grid { grid-template-columns: 1fr; gap: 16px; }
        .service-card { padding: 12px; border-radius: 14px; }
        .service-title { font-size: 17px; }
        .btn-portal { padding: 9px 14px; font-size: 13px; }
        .filter-wrapper { margin-bottom: 30px; gap: 5px; }
        .filter-next-btn { display: none !important; } /* মোবাইলে টাচ স্ক্রলিং ইনাফ, বাটন দরকার নেই */
    }