/* استایل‌های قبلی (بدون تغییر) */
      .courses-wrapper {
        width: 100%;
        max-width: 1400px;
        margin: 0 auto;
        padding: 1.5rem;
      }
      .courses-header {
        text-align: center;
        margin-bottom: 2rem;
      }
      .courses-header h1 {
        font-size: 2.2rem;
        background: linear-gradient(135deg, #a0eaff, #6c5ce7);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        display: inline-block;
        margin: 0;
      }
      .filter-bar {
        display: flex;
        justify-content: center;
        gap: 1rem;
        flex-wrap: wrap;
        margin-bottom: 2rem;
      }
      .search-box,
      .filter-select {
        background: rgba(20, 20, 40, 0.8);
        border: 1px solid rgba(108, 92, 231, 0.5);
        border-radius: 60px;
        padding: 0.7rem 1.5rem;
        color: #eee;
        font-size: 0.95rem;
        outline: none;
        backdrop-filter: blur(4px);
      }
      .search-box {
        width: 280px;
      }
      .filter-select {
        cursor: pointer;
      }
      .search-box:focus,
      .filter-select:focus {
        border-color: #6c5ce7;
        box-shadow: 0 0 12px rgba(108, 92, 231, 0.5);
      }
      .filter-select option {
        background: #1e1e2e;
      }
      .card-grid {
        display: grid;
        gap: 2rem;
        margin-top: 1rem;
      }
      @media (max-width: 767px) {
        .card-grid {
          grid-template-columns: 1fr;
        }
      }
      @media (min-width: 768px) and (max-width: 1023px) {
        .card-grid {
          grid-template-columns: repeat(2, 1fr);
        }
      }
      @media (min-width: 1024px) {
        .card-grid {
          grid-template-columns: repeat(3, 1fr);
        }
      }
      .card {
        background: rgba(20, 20, 40, 0.75);
        backdrop-filter: blur(8px);
        border: 1px solid rgba(108, 92, 231, 0.3);
        border-radius: 24px;
        overflow: hidden;
        transition:
          transform 0.2s,
          box-shadow 0.2s;
      }
      .card:hover {
        transform: translateY(-6px);
        box-shadow: 0 15px 35px rgba(108, 92, 231, 0.3);
        border-color: #6c5ce7;
      }
      .card-image img {
        width: 100%;
        height: 200px;
        object-fit: cover;
      }
      .card-content {
        padding: 1.2rem;
      }
      .card-content h3 {
        color: #a0eaff;
        font-size: 1.2rem;
        margin-bottom: 0.5rem;
      }
      .card-content p {
        color: #ccc;
        font-size: 0.85rem;
        line-height: 1.5;
        margin-bottom: 0.8rem;
      }
      .card-content strong {
        color: #00e5ff;
        font-size: 1rem;
      }
      .card-actions {
        padding: 0 1.2rem 1.2rem;
        display: flex;
        gap: 0.8rem;
      }
      .empty-message {
        text-align: center;
        padding: 3rem;
        color: #aaa;
        font-size: 1.1rem;
        grid-column: 1 / -1;
      }
      .page-header { text-align: center; padding: 2rem 1rem; }
      .page-header p { color: #888; max-width: 500px; margin: 0.5rem auto 0; font-size: 0.9rem; }
      @media (max-width: 768px) {
        .page-header { padding: 1.5rem 1rem; }
      }
      @media (max-width: 640px) {
        .courses-wrapper {
          padding: 1rem;
        }
        .filter-bar {
          flex-direction: column;
          align-items: stretch;
        }
        .search-box,
        .filter-select {
          width: 100%;
        }
      }
      @media (max-width: 480px) {
        .courses-header h1 { font-size: 1.6rem; }
        .card-image img { height: 160px; }
        .card-content { padding: 0.8rem; }
      }