/* Background Glow */
  .bg-glow { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
  .bg-glow .orb { position: absolute; border-radius: 50%; filter: blur(100px); opacity: 0.12; animation: float 20s ease-in-out infinite; }
  .bg-glow .orb:nth-child(1) { width: 600px; height: 600px; background: var(--accent-1); top: -200px; left: -100px; }
  .bg-glow .orb:nth-child(2) { width: 500px; height: 500px; background: var(--accent-2); top: 40%; right: -150px; animation-delay: -7s; }
  .bg-glow .orb:nth-child(3) { width: 400px; height: 400px; background: var(--accent-3); bottom: -100px; left: 30%; animation-delay: -14s; }
  @keyframes float { 0%, 100% { transform: translate(0, 0) scale(1); } 33% { transform: translate(40px, -30px) scale(1.05); } 66% { transform: translate(-20px, 20px) scale(0.95); } }

 

  /* ==================== Page Banner ==================== */
  .page-banner {
    position: relative; z-index: 1; padding: calc(var(--nav-height) + 48px) 0 40px;
    background: linear-gradient(180deg, rgba(108,92,231,0.08) 0%, transparent 100%);
    border-bottom: 1px solid rgba(255,255,255,0.04);
  }
  .banner-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
  .banner-left h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -0.5px; }
  .banner-left h1 .gradient-text { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
  .breadcrumb { display: flex; align-items: center; gap: 8px; margin-top: 8px; font-size: 0.85rem; color: var(--text-secondary); }
  .breadcrumb a { color: var(--text-secondary); transition: var(--transition); }
  .breadcrumb a:hover { color: var(--accent-2); }
  .breadcrumb .sep { opacity: 0.4; }
  .breadcrumb .current { color: var(--text-primary); }
  .banner-stats { display: flex; gap: 24px; }
  .banner-stat { text-align: center; }
  .banner-stat .num { font-size: 1.3rem; font-weight: 800; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
  .banner-stat .label { font-size: 0.78rem; color: var(--text-secondary); margin-top: 2px; }

  /* ==================== Filter Bar ==================== */
  .filter-section { position: relative; z-index: 1; padding: 28px 0 0; }
  .filter-bar {
    display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
    padding: 20px 24px; background: var(--bg-card); border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius); margin-bottom: 28px;
  }
  .search-box {
    flex: 1; min-width: 220px; position: relative;
  }
  .search-box input {
    width: 100%; padding: 10px 16px 10px 40px; background: rgba(0,0,0,0.3); border: 1px solid rgba(255,255,255,0.08);
    border-radius: 10px; color: var(--text-primary); font-size: 0.9rem; outline: none;
    transition: border-color 0.2s, box-shadow 0.2s; font-family: inherit;
  }
  .search-box input::placeholder { color: rgba(255,255,255,0.25); }
  .search-box input:focus { border-color: var(--accent-1); box-shadow: 0 0 0 3px rgba(108,92,231,0.15); }
  .search-box .search-icon {
    position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
    color: var(--text-secondary); font-size: 0.9rem; pointer-events: none;
  }
  .filter-select {
    padding: 10px 36px 10px 14px; background: rgba(0,0,0,0.3); border: 1px solid rgba(255,255,255,0.08);
    border-radius: 10px; color: var(--text-primary); font-size: 0.88rem; outline: none;
    cursor: pointer; font-family: inherit; appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239999b0'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: right 12px center;
    transition: border-color 0.2s;
  }
  .filter-select:focus { border-color: var(--accent-1); }
  .filter-select option { background: var(--bg-card); color: var(--text-primary); }

  .view-toggle { display: flex; gap: 4px; margin-left: auto; }
  .view-btn {
    width: 38px; height: 38px; border-radius: 8px; border: 1px solid rgba(255,255,255,0.08);
    background: transparent; color: var(--text-secondary); cursor: pointer;
    display: flex; align-items: center; justify-content: center; font-size: 1rem;
    transition: var(--transition);
  }
  .view-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
  .view-btn.active { background: rgba(108,92,231,0.2); border-color: rgba(108,92,231,0.4); color: var(--accent-1); }

  /* ==================== Category Tabs ==================== */
  .sub-cats { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; }
  .sub-cat-pill { padding: 7px 18px; border-radius: 50px; font-size: 0.84rem; font-weight: 600; border: 1px solid rgba(255,255,255,0.08); color: var(--text-secondary); background: transparent; cursor: pointer; transition: var(--transition); }
  .sub-cat-pill:hover { border-color: rgba(108,92,231,0.3); color: var(--text-primary); }
  .sub-cat-pill.active { background: rgba(108,92,231,0.15); border-color: rgba(108,92,231,0.4); color: var(--text-primary); }
  .sub-cat-pill .cat-count {
    display: inline-block; margin-left: 6px; padding: 1px 7px; border-radius: 50px;
    font-size: 0.7rem; background: rgba(255,255,255,0.06); color: var(--text-secondary);
  }
  .sub-cat-pill.active .cat-count { background: rgba(108,92,231,0.3); color: var(--text-primary); }

  /* ==================== List Content Area ==================== */
  .list-section { position: relative; z-index: 1; padding: 0 0 80px; }
  .list-layout { display: flex; gap: 28px; }
  
  /* Sidebar */
  .list-sidebar { width: 260px; flex-shrink: 0; }
  .sidebar-card {
    background: var(--bg-card); border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius); padding: 24px; margin-bottom: 20px;
  }
  .sidebar-card h3 {
    font-size: 0.95rem; font-weight: 700; margin-bottom: 16px;
    display: flex; align-items: center; gap: 8px;
  }
  .sidebar-card h3 .icon { font-size: 1.1rem; }
  
  .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
  .tag-item {
    padding: 5px 12px; border-radius: 6px; font-size: 0.78rem; font-weight: 500;
    background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06);
    color: var(--text-secondary); cursor: pointer; transition: var(--transition);
  }
  .tag-item:hover { background: rgba(108,92,231,0.12); border-color: rgba(108,92,231,0.3); color: var(--text-primary); }
  .tag-item.active { background: rgba(108,92,231,0.2); border-color: rgba(108,92,231,0.4); color: var(--text-primary); }
  
  .difficulty-list { display: flex; flex-direction: column; gap: 8px; }
  .diff-item {
    display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-radius: 8px;
    cursor: pointer; transition: var(--transition); font-size: 0.85rem; color: var(--text-secondary);
  }
  .diff-item:hover { background: rgba(255,255,255,0.04); color: var(--text-primary); }
  .diff-item.active { background: rgba(108,92,231,0.1); color: var(--text-primary); }
  .diff-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
  .diff-dot.beginner { background: var(--accent-2); }
  .diff-dot.intermediate { background: var(--accent-1); }
  .diff-dot.advanced { background: var(--accent-3); }
  .diff-count { margin-left: auto; font-size: 0.75rem; opacity: 0.6; }

  .sidebar-popular { display: flex; flex-direction: column; gap: 12px; }
  .popular-item {
    display: flex; gap: 12px; align-items: center; padding: 8px; border-radius: 10px;
    cursor: pointer; transition: var(--transition);
  }
  .popular-item:hover { background: rgba(255,255,255,0.04); }
  .popular-rank {
    width: 24px; height: 24px; border-radius: 6px; display: flex; align-items: center; justify-content: center;
    font-size: 0.72rem; font-weight: 800; flex-shrink: 0;
    background: rgba(255,255,255,0.06); color: var(--text-secondary);
  }
  .popular-rank.top { background: var(--gradient-main); color: #fff; }
  .popular-info { flex: 1; min-width: 0; }
  .popular-info h4 { font-size: 0.82rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .popular-info span { font-size: 0.72rem; color: var(--text-secondary); }
  .popular-thumb {
    width: 48px; height: 36px; border-radius: 6px; flex-shrink: 0;
    background-size: cover; background-position: center;
  }

  /* Main Content */
  .list-main { flex: 1; min-width: 0; }
  
  .result-bar {
    display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px;
    font-size: 0.88rem; color: var(--text-secondary); flex-wrap: wrap; gap: 8px;
  }
  .result-bar strong { color: var(--text-primary); }

  /* Card Grid View */
  .card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
  .card-grid.view-2col { grid-template-columns: repeat(2, 1fr); }
  
  .card-link { display: block; text-decoration: none; color: inherit; }
  .card {
    background: var(--bg-card); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius);
    overflow: hidden; transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    cursor: pointer; animation: cardFadeIn 0.4s ease forwards; height: 100%;
  }
  @keyframes cardFadeIn { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }
  .card:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(0,0,0,0.3); border-color: rgba(108,92,231,0.3); }
  .card-thumb { width: 100%; aspect-ratio: 16/9; position: relative; overflow: hidden; }
  .card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
  .card:hover .card-thumb img { transform: scale(1.1); }
  .card-tag { position: absolute; top: 10px; left: 10px; padding: 3px 12px; border-radius: 6px; font-size: 0.75rem; font-weight: 700; color: #fff; z-index: 2; }
  .tag-beginner { background: rgba(0,206,201,0.85); }
  .tag-intermediate { background: rgba(108,92,231,0.85); }
  .tag-advanced { background: rgba(253,121,168,0.85); }
  .card-duration {
    position: absolute; bottom: 10px; right: 10px; padding: 2px 8px; border-radius: 4px;
    font-size: 0.7rem; font-weight: 600; background: rgba(0,0,0,0.7); color: #fff;
    backdrop-filter: blur(4px); z-index: 2;
  }
  .card-body { padding: 18px 20px; }
  .card-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .card-body p { font-size: 0.83rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .card-meta { display: flex; justify-content: space-between; align-items: center; font-size: 0.78rem; color: var(--text-secondary); }
  .card-author { display: flex; align-items: center; gap: 6px; }
  .card-author .avatar {
    width: 20px; height: 20px; border-radius: 50%; background: var(--gradient-main);
    display: flex; align-items: center; justify-content: center; font-size: 0.55rem; color: #fff; font-weight: 700;
  }

  /* List View */
  .card-grid.view-list { grid-template-columns: 1fr; gap: 16px; }
  .view-list .card {
    display: grid; grid-template-columns: 280px 1fr; height: auto;
  }
  .view-list .card-thumb { aspect-ratio: auto; height: 100%; min-height: 160px; }
  .view-list .card-body { display: flex; flex-direction: column; justify-content: center; padding: 20px 24px; }
  .view-list .card-body h3 { font-size: 1.08rem; -webkit-line-clamp: 1; }
  .view-list .card-body p { -webkit-line-clamp: 2; }
  .view-list .card-extra { display: flex; align-items: center; gap: 16px; margin-top: auto; }
  .view-list .card-tags-row { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
  .mini-tag {
    padding: 2px 8px; border-radius: 4px; font-size: 0.7rem; font-weight: 600;
    background: rgba(255,255,255,0.06); color: var(--text-secondary);
  }

  /* ==================== Pagination ==================== */
  .pagination {
    display: flex; align-items: center; justify-content: center; gap: 8px;
    margin-top: 48px; flex-wrap: wrap;
  }
  .page-btn {
    min-width: 40px; height: 40px; border-radius: 10px; border: 1px solid rgba(255,255,255,0.08);
    background: transparent; color: var(--text-secondary); font-size: 0.88rem; font-weight: 600;
    cursor: pointer; transition: var(--transition); display: flex; align-items: center; justify-content: center;
    padding: 0 12px; font-family: inherit;
  }
  .page-btn:hover:not(:disabled):not(.active) { border-color: rgba(108,92,231,0.3); color: var(--text-primary); background: rgba(108,92,231,0.08); }
  .page-btn.active { background: var(--gradient-main); border-color: transparent; color: #fff; box-shadow: 0 4px 12px rgba(108,92,231,0.3); }
  .page-btn:disabled { opacity: 0.3; cursor: not-allowed; }
  .page-info { font-size: 0.85rem; color: var(--text-secondary); margin: 0 8px; }

  /* ==================== Responsive ==================== */
  @media (max-width: 1024px) {
    .list-sidebar { display: none; }
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .view-list .card { grid-template-columns: 220px 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 768px) {
    :root { --nav-height: 60px; }
    .nav-links, .nav-actions .btn-ghost { display: none; }
    .mobile-toggle { display: block; }
    .page-banner { padding: calc(var(--nav-height) + 32px) 0 28px; }
    .banner-inner { flex-direction: column; align-items: flex-start; }
    .banner-stats { width: 100%; justify-content: flex-start; }
    .filter-bar { flex-direction: column; align-items: stretch; }
    .search-box { min-width: auto; }
    .view-toggle { margin-left: 0; justify-content: flex-end; }
    .card-grid, .card-grid.view-2col { grid-template-columns: 1fr; }
    .view-list .card { grid-template-columns: 1fr; }
    .view-list .card-thumb { aspect-ratio: 16/9; min-height: auto; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-col { display: flex; flex-wrap: wrap; gap: 8px 16px; }
    .footer-col h4 { width: 100%; margin-bottom: 10px; }
    .footer-col a { display: inline-block; margin-bottom: 0; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    .list-section { padding: 0 0 60px; }
    .pagination { gap: 6px; }
    .page-btn { min-width: 36px; height: 36px; font-size: 0.82rem; }
    .auth-modal { max-width: 90%; margin: 0 16px; }
    .auth-view { padding: 32px 24px; }
  }
  @media (max-width: 480px) {
    .banner-stats { gap: 16px; }
    .banner-stat .num { font-size: 1.1rem; }
    .sub-cats { gap: 6px; }
    .sub-cat-pill { padding: 5px 12px; font-size: 0.78rem; }
    .filter-select { width: 100%; }
    .result-bar { flex-direction: column; align-items: flex-start; }
  }