/* ── PAGE SECTIONS ── */
    section {
      padding: 72px 80px
    }

    /* ── SUB-NAV (nav con) ── */
    .subnav {
      background: var(--white);
      border-bottom: 1px solid var(--border);
      padding: 0 80px;
      position: sticky;
      top: 64px;
      z-index: 90;
    }

    .subnav-list {
      display: flex;
      gap: 0;
      overflow-x: auto;
      scrollbar-width: none
    }

    .subnav-list::-webkit-scrollbar {
      display: none
    }

    .subnav-list a {
      display: flex;
      align-items: center;
      gap: 7px;
      padding: 14px 20px;
      font-size: 14px;
      font-weight: 600;
      color: var(--gray);
      border-bottom: 2.5px solid transparent;
      white-space: nowrap;
      transition: all .15s;
    }

    .subnav-list a:hover {
      color: var(--dark)
    }

    .subnav-list a.active {
      color: var(--blue);
      border-bottom-color: var(--blue)
    }

    /* ── COURSE GRID ── */
    .courses-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px
    }

    .course-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      transition: box-shadow .2s, transform .2s;
      display: flex;
      flex-direction: column;
    }

    .course-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px)
    }

    .course-thumb {
      width: 100%;
      aspect-ratio: 16/9;
      background: linear-gradient(135deg, #dbeafe, #ede9fe);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 48px;
      position: relative;
      overflow: hidden;
    }

    .course-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      position: absolute;
      inset: 0
    }

    .course-level {
      position: absolute;
      top: 12px;
      left: 12px;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 10px;
    }

    .lv-red {
      background: #fce4e4;
      color: var(--red)
    }

    .lv-blue {
      background: var(--blue-light);
      color: var(--blue)
    }

    .lv-green {
      background: #f0fdf4;
      color: #16a34a
    }

    .lv-purple {
      background: #f5f3ff;
      color: #7c3aed
    }

    .course-body {
      padding: 22px;
      flex: 1;
      display: flex;
      flex-direction: column
    }

    .course-body h3 {
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 6px
    }

    .course-target {
      font-size: 13px;
      color: var(--blue);
      font-weight: 600;
      margin-bottom: 12px
    }

    .course-body p {
      font-size: 14px;
      color: var(--gray);
      line-height: 1.65;
      flex: 1
    }

    .course-meta {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px solid var(--border);
    }

    .course-meta span {
      display: flex;
      align-items: center;
      gap: 5px;
      font-size: 12px;
      color: var(--gray)
    }

    .course-price {
      margin-top: 12px;
      font-size: 15px;
      font-weight: 800;
      color: var(--dark);
    }

    .course-cta {
      margin-top: 16px;
      display: flex;
      gap: 10px
    }

    .course-cta .btn {
      flex: 1;
      justify-content: center
    }

    /* ── CTA BANNER ── */
    .cta-banner {
      background: linear-gradient(135deg, var(--blue) 0%, #7c3aed 100%);
      border-radius: 20px;
      padding: 56px;
      text-align: center;
      color: #fff;
      margin: 0 80px 80px;
    }

    .cta-banner h2 {
      font-size: clamp(24px, 3vw, 36px);
      font-weight: 900;
      margin-bottom: 12px
    }

    .cta-banner p {
      font-size: 16px;
      color: rgba(255, 255, 255, .8);
      max-width: 520px;
      margin: 0 auto 28px
    }

    .cta-banner .btn-white {
      background: #fff;
      color: var(--blue);
      font-weight: 800;
      padding: 13px 28px;
      border-radius: 12px
    }

    .cta-banner .btn-white:hover {
      background: rgba(255, 255, 255, .9);
      transform: translateY(-1px)
    }

    .cta-banner .btn-ghost {
      background: rgba(255, 255, 255, .15);
      color: #fff;
      border: 1.5px solid rgba(255, 255, 255, .4);
      padding: 13px 28px;
      border-radius: 12px
    }

    .cta-banner .btn-ghost:hover {
      background: rgba(255, 255, 255, .25)
    }

    .cta-actions {
      display: flex;
      gap: 14px;
      justify-content: center;
      flex-wrap: wrap
    }

    /* ── RESPONSIVE ── */
    @media(max-width:1024px) {
      section {
        padding: 56px 40px
      }

      .subnav {
        padding: 0 40px
      }

      .courses-grid {
        grid-template-columns: repeat(2, 1fr)
      }

      .cta-banner {
        margin: 0 40px 60px;
        padding: 40px
      }
    }

    @media(max-width:768px) {
      section {
        padding: 44px 20px
      }

      .subnav {
        padding: 0 16px;
        top: 64px
      }

      .subnav-list a {
        padding: 12px 14px;
        font-size: 13px
      }

      .courses-grid {
        grid-template-columns: 1fr
      }

      .cta-banner {
        margin: 0 20px 44px;
        padding: 28px 20px
      }

      .course-cta {
        flex-direction: column
      }

      .course-cta .btn {
        flex: unset
      }
    }