.dropdown-menu {
        display: grid !important;
        grid-template-rows: 0fr;
        opacity: 0;
        visibility: hidden;
        overflow: hidden;
        transition: grid-template-rows 0.35s cubic-bezier(0.4, 0, 0.2, 1), 
                    opacity 0.25s ease-in-out, 
                    visibility 0.35s;
    }
    .dropdown-menu > div {
        min-height: 0;
    }
    
    .dropdown:hover .dropdown-menu,
    .dropdown.dropdown-open .dropdown-menu {
        grid-template-rows: 1fr;
        opacity: 1;
        visibility: visible;
    }

    /* শেভরন আইকন রোটেশন */
    .icon-chevron { 
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1); 
    }
    .dropdown:hover .icon-chevron,
    .dropdown.dropdown-open .icon-chevron,
    .mobile-dropdown-open > summary .icon-chevron { 
        transform: rotate(90deg); 
    }

    /* মোবাইল স্লাইড-ইন মেনু এবং স্ক্রল ফিক্স */
    @media (max-width: 1023px) {
        #mobileMenu { 
            position: fixed;
            top: 0;
            right: -100%;
            width: 90%;
            max-width: 360px;
            height: 100vh; 
            overflow-y: auto;
            overflow-x: hidden;
            background-color: #0a0a0a;
            z-index: 45; 
            display: flex !important; 
            flex-direction: column;
            box-shadow: -10px 0 30px rgba(0, 0, 0, 0.6);
            border-left: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 16px; 
            transition: right 0.4s cubic-bezier(0.25, 1, 0.5, 1);
            -webkit-overflow-scrolling: touch;
        }

        #mobileMenu.active {
            right: 0; 
        }

        #mobileMenu > * {
            flex-shrink: 0 !important;
        }
    }

    @media (min-width: 1024px) {
        #mobileMenu {
            display: none !important;
        }
    }

    #mobileMenuBtn {
        transition: opacity 0.1s ease-out, transform 0.1s ease-out;
        will-change: opacity, transform;
    }
    #mobileMenuBtn.menu-btn-hidden {
        opacity: 0;
        pointer-events: none;
        transform: scale(0.9);
    }

    .mobile-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background-color: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(4px);
        z-index: 40;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.35s ease;
    }
    .mobile-overlay.active {
        opacity: 1;
        pointer-events: auto;
    }

    .mobile-accordion {
        overflow: hidden;
    }
    .mobile-accordion-content {
        max-height: 0;
        opacity: 0;
        overflow: hidden;
        transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), 
                    opacity 0.25s ease-in-out;
    }

    details > summary { list-style: none; }
    details > summary::-webkit-details-marker { display: none; }

    #mobileMenu::-webkit-scrollbar { width: 3px; }
    #mobileMenu::-webkit-scrollbar-thumb { background: #333; border-radius: 10px; }

    /* ব্লগ সেকশন থিম কালার */
    :root {
      --bg-primary: #000000;
      --bg-card: #080808;
      --border-subtle: #1a1a1a;
      --text-muted: #888888;
    }

    body {
      font-family: "Inter", sans-serif;
      background-color: var(--bg-primary);
      color: #ffffff;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }

    .brand-header {
      padding: 15px 40px;
      font-weight: 700;
      font-size: 18px;
      letter-spacing: -0.02em;
      border-bottom: 1px solid var(--border-subtle);
      background: #000;
      position: sticky;
      top: 0;
      z-index: 50;
    }

    /* এলাইনমেন্ট সামঞ্জস্যতা */
    #mainsek {
      padding: 30px 24px;
      max-width: 1280px;
      margin: 110px auto 90px auto;
      box-sizing: border-box;
    }

    #mainh1 {
      font-size: 36px;
      font-weight: 700;
      letter-spacing: -0.03em;
    }

    /* category nav */
    .category-nav {
      display: flex;
      gap: 24px;
      margin-bottom: 25px;
      border-bottom: 1px solid var(--border-subtle);
      overflow-x: auto;
    }
    .category-nav::-webkit-scrollbar {
      display: none;
    }

    .category-nav button {
      background: none;
      border: none;
      color: var(--text-muted);
      font-size: 14px;
      font-weight: 500;
      padding: 10px 0;
      cursor: pointer;
      transition: color 0.3s;
      white-space: nowrap;
      border-bottom: 2px solid transparent;
    }
    .category-nav button.active {
      color: #ffffff;
      border-bottom: 2px solid #ffffff;
    }

    /* controls */
    .controls-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 30px;
    }

    .left-controls {
      display: flex;
      gap: 24px;
      align-items: center;
    }

    .minimal-btn {
      background: none;
      border: none;
      color: #888;
      font-size: 13px;
      font-weight: 500;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 6px;
      transition: color 0.2s;
      user-select: none;
    }
    .minimal-btn:hover {
      color: #fff;
    }

    /* filter dropdown */
    .filter-container {
      position: relative;
    }

    .filter-modal {
      display: none;
      position: absolute;
      top: 35px;
      left: 0;
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 12px;
      padding: 24px;
      width: 480px;
      z-index: 100;
      box-shadow: 0 20px 40px rgba(0,0,0,0.8);
    }
    .filter-modal.active {
      display: block;
    }

    .filter-grid {
      display: flex;
      gap: 40px;
      margin-bottom: 24px;
    }

    .filter-column {
      flex: 1;
    }

    .filter-label {
      color: var(--text-muted);
      font-size: 12px;
      margin-bottom: 16px;
      display: block;
    }

    .filter-options {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .checkbox-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: #fff;
      cursor: pointer;
      user-select: none;
    }

    .checkbox-item input {
      appearance: none;
      width: 16px;
      height: 16px;
      border: 1.5px solid #333;
      border-radius: 4px;
      background: transparent;
      cursor: pointer;
      position: relative;
    }

    .checkbox-item input:checked {
      background: #fff;
      border-color: #fff;
    }

    .checkbox-item input:checked::after {
      content: '✓';
      color: #000;
      font-size: 10px;
      position: absolute;
      left: 2.5px;
      top: -1px;
    }

    .filter-footer {
      border-top: 1px solid var(--border-subtle);
      padding-top: 16px;
      display: flex;
      justify-content: flex-end;
      gap: 10px;
      align-items: center;
    }

    .apply-btn {
      background: #ffffff;
      color: #000000;
      border: none;
      padding: 6px 16px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      min-width: 80px;
      transition: opacity 0.2s;
    }

    .apply-btn:disabled { opacity: 0.3; cursor: not-allowed; }
    .apply-btn.reset-mode { background: #ffffff; color: #000; opacity: 1 !important; }

    .cancel-btn {
      background: none;
      border: none;
      color: #fff;
      font-size: 14px;
      cursor: pointer;
      min-width: 85px;
      text-align: right;
    }
    .cancel-btn:disabled { opacity: 0.3; cursor: not-allowed; }

    .sort-icon {
      transition: transform 0.3s ease;
    }
    .minimal-btn.active .sort-icon {
      transform: rotate(180deg);
    }

    .sort-container {
        position: relative;
    }

    .sort-toggle-btns {
      display: none;
      position: absolute;
      top: 30px;
      left: 0;
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 8px;
      flex-direction: column;
      padding: 6px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.8);
      z-index: 100;
      min-width: 140px;
      opacity: 0;
      transform: translateY(-5px);
      transition: opacity 0.2s, transform 0.2s;
    }
    .sort-toggle-btns.active {
      display: flex;
      opacity: 1;
      transform: translateY(0);
    }

    .sort-toggle-btns button {
      background: none;
      border: none;
      color: #888;
      font-size: 13px;
      padding: 8px 12px;
      text-align: left;
      cursor: pointer;
      border-radius: 4px;
      transition: all 0.2s;
    }
    .sort-toggle-btns button:hover, .sort-toggle-btns button.active {
      color: #fff;
      background: #1a1a1a;
    }

    .view-modes button {
      background: none;
      border: none;
      cursor: pointer;
      color: #444;
      font-size: 1rem;
      padding: 4px;
      transition: all 0.3s;
    }
    .view-modes button.active { color: #fff; }

    /* ব্লগ গ্রিড এবং ঝিলিক প্রতিরোধী ফেইড-ইন ট্রানজিশন */
    .blog-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
      opacity: 0; /* শুরুতে পেজ লোডের সময় ইনভিজিবল থাকবে */
      transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .blog-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 12px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
      cursor: pointer;
      position: relative;
      text-decoration: none;
    }
    .blog-card.hidden {
      display: none;
    }

    .paginated-hidden {
      display: none !important;
    }

    .view-more-container {
      display: none;
      justify-content: center;
      margin-top: 40px;
    }
    .view-more-btn {
      background-color: #ffffff;
      color: #000000;
      border: none;
      padding: 12px 28px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: opacity 0.3s;
    }
    .view-more-btn:hover {
      opacity: 0.8;
    }

    .blog-card:hover {
      border-color: #333;
      background-color: #0c0c0c;
    }

    .img-container {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
    }
    .img-container img { width: 100%; height: 100%; object-fit: cover; }

    .card-content {
      padding: 20px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      flex: 1;
    }

    .card-content h2 { font-size: 18px; font-weight: 600; color: #fff; margin: 0; text-decoration: none; }
    .card-subtitle { font-size: 14px; color: var(--text-muted); line-height: 1.5; margin: 0; }
    .date-label { font-size: 12px; color: #555; margin-top: auto; padding-top: 10px; }

    .empty-state {
      grid-column: 1 / -1;
      text-align: center;
      padding: 80px 20px;
      display: none;
    }
    .empty-state p {
      color: var(--text-muted);
      font-size: 16px;
    }

    .blog-grid.list-view-active {
      display: flex !important;
      flex-direction: column;
      gap: 12px;
    }

    .blog-card.list-item {
      flex-direction: row !important;
      padding: 12px 20px;
      align-items: center;
      gap: 18px;
    }

    .blog-card.list-item .img-container {
      width: 80px;
      height: 55px;
      border-radius: 6px;
      flex-shrink: 0;
    }

    .blog-card.list-item .card-content {
      padding: 0;
      flex-direction: row;
      align-items: center;
      justify-content: space-between;
      flex: 1;
    }

    .blog-card.list-item .title-stack {
      display: flex;
      flex-direction: column;
      gap: 2px;
      max-width: 60%;
    }

    .blog-card.list-item h2 { font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .blog-card.list-item .card-subtitle { font-size: 12px; -webkit-line-clamp: 1; display: -webkit-box; -webkit-box-orient: vertical; overflow: hidden; }
    .blog-card.list-item .date-label { margin: 0; padding: 0; text-align: right; font-size: 12px; color: #444; white-space: nowrap; }

    .arrow-icon { display: none; color: #444; transition: color 0.3s, transform 0.3s; font-size: 14px; margin-left: 15px; }
    .blog-card.list-item .arrow-icon { display: block; }
    .blog-card.list-item:hover .arrow-icon { color: #fff; transform: translateX(3px); }

    @media (max-width: 640px) {
      #mainsek { padding: 20px; }
      .brand-header { padding: 15px 20px; }
      .blog-card.list-item .title-stack { max-width: 70%; }
      .blog-card.list-item .arrow-icon { display: none; }
    }

    /* থিম পরিবর্তনের ট্রানজিশন */
    html.dark body { background-color: #050505; }
    body { transition: background-color 0.3s ease; }

    .no-color-transition {
        transition: all 0.3s ease;
    }

    .rounded-toast {
        position: fixed;
        top: -100px;
        left: 50%;
        transform: translateX(-50%);
        z-index: 9999;
        transition: top 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
        opacity: 0;
        cursor: pointer;
    }
    .rounded-toast.show {
        top: 24px;
        opacity: 1;
    }

    /* রেসপন্সিভ ওভারফ্লো সেফগার্ড এবং মোবাইল মোডে ফিল্টার মোডাল ফিক্স */
    html, body {
        max-width: 100vw;
        overflow-x: hidden;
        position: relative;
    }
    
    @media (max-width: 520px) {
        .filter-modal {
            width: calc(100vw - 32px) !important;
            max-width: 320px !important;
            left: 0 !important;
            transform: none !important;
        }
    }