/* ======== HERO UPGRADE ======== */
    .case-hero {
      position: relative;
      min-height: 350px;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
      background: linear-gradient(135deg, var(--color-primary-900) 0%, var(--color-primary-700) 50%, #0d1f33 100%);
    }
    .case-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background:
        radial-gradient(ellipse 80% 60% at 20% 50%, rgba(56,189,248,0.12) 0%, transparent 70%),
        radial-gradient(ellipse 60% 80% at 80% 30%, rgba(250,204,21,0.08) 0%, transparent 70%);
      z-index: 0;
    }
    .case-hero::after {
      content: '';
      position: absolute;
      bottom: 0; left: 0; right: 0;
      height: 120px;
      background: linear-gradient(to top, var(--color-gray-50), transparent);
      z-index: 1;
      pointer-events: none;
    }
    .case-hero .container {
      position: relative;
      z-index: 2;
      text-align: center;
      padding: 80px 20px 100px;
    }
    .case-hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(56,189,248,0.12);
      border: 1px solid rgba(56,189,248,0.25);
      color: #38bdf8;
      font-size: var(--text-xs);
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      padding: 6px 16px;
      border-radius: var(--radius-full);
      margin-bottom: var(--space-6);
      animation: fadeInDown 0.7s ease both;
    }
    .case-hero .page-hero-title {
      font-size: clamp(2rem, 5vw, 3.5rem);
      font-weight: 800;
      color: var(--color-white);
      line-height: 1.15;
      margin-bottom: var(--space-4);
      animation: fadeInUp 0.7s 0.15s ease both;
    }
    .case-hero .page-hero-subtitle {
      font-size: clamp(1rem, 2vw, 1.25rem);
      color: rgba(255,255,255,0.75);
      max-width: 640px;
      margin: 0 auto var(--space-10);
      line-height: var(--leading-relaxed);
      animation: fadeInUp 0.7s 0.3s ease both;
    }
    .case-hero-stats {
      display: flex;
      justify-content: center;
      gap: 48px;
      animation: fadeInUp 0.7s 0.45s ease both;
    }
    .case-stat {
      text-align: center;
    }
    .case-stat-num {
      display: block;
      font-size: 2.25rem;
      font-weight: 800;
      background: linear-gradient(135deg, #38bdf8, #facc15);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
    }
    .case-stat-label {
      display: block;
      font-size: var(--text-xs);
      color: rgba(255,255,255,0.5);
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      margin-top: 4px;
    }
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(24px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    @keyframes fadeInDown {
      from { opacity: 0; transform: translateY(-16px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    /* ======== FILTER BAR UPGRADE ======== */
    .filter-bar {
      padding: 20px 0;
      background: var(--color-white);
      border-bottom: 1px solid var(--color-border);
      position: static;
      z-index: 90;
      transition: box-shadow 0.3s, background 0.3s;
    }
    .filter-bar.is-sticky {
      box-shadow: none;
      background: var(--color-white);
      backdrop-filter: none;
    }
    .filter-bar .container {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .filter-row {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
    }
    .filter-row-label {
      font-size: var(--text-xs);
      font-weight: 700;
      color: var(--color-gray-400);
      text-transform: uppercase;
      letter-spacing: 0.07em;
      white-space: nowrap;
      min-width: 90px;
    }
    .filter-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .filter-pill {
      padding: 7px 18px;
      font-size: var(--text-xs);
      font-weight: 600;
      color: var(--color-gray-600);
      background: var(--color-gray-50);
      border: 1.5px solid var(--color-border);
      border-radius: var(--radius-full);
      cursor: pointer;
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      white-space: nowrap;
      user-select: none;
    }
    .filter-pill:hover {
      color: var(--color-primary);
      border-color: rgba(26,58,92,0.3);
      background: var(--color-white);
      transform: translateY(-1px);
      box-shadow: 0 2px 8px rgba(26,58,92,0.08);
    }
    .filter-pill.active {
      color: var(--color-white);
      background: linear-gradient(135deg, var(--color-primary), #1a5a8c);
      border-color: transparent;
      box-shadow: 0 2px 12px rgba(26,58,92,0.3);
      transform: translateY(-1px);
    }

    /* ======== SAMPLE GRID (homepage style) ======== */
    .sample-grid-enhanced {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .sample-item-enhanced {
      position: relative;
      aspect-ratio: 1;
      border-radius: 10px;
      overflow: hidden;
      cursor: pointer;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid var(--color-border);
    }
    .sample-item-enhanced:hover {
      transform: translateY(-4px);
      box-shadow: 0 8px 24px rgba(0,0,0,0.12);
      border-color: rgba(0,95,218,0.2);
    }
    .sample-item-enhanced.is-hidden {
      display: none !important;
    }
    .sample-item-enhanced.is-filtering-out {
      opacity: 0;
      transform: scale(0.92);
      pointer-events: none;
    }
    .sample-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(0,0,0,0) 40%, rgba(0,0,0,0.8) 100%);
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 16px;
      opacity: 0;
      transition: opacity 0.35s;
    }
    .sample-item-enhanced:hover .sample-overlay {
      opacity: 1;
    }
    .sample-overlay h4 {
      color: white;
      font-size: var(--text-xs);
      font-weight: 700;
      margin: 0 0 4px;
    }
    .sample-tag {
      display: inline-block;
      padding: 2px 6px;
      background: rgba(255,255,255,0.18);
      color: white;
      font-size: 10px;
      font-weight: 600;
      border-radius: 4px;
      backdrop-filter: blur(4px);
    }

    /* ======== VIDEO GRID (homepage style) ======== */
    .video-grid-enhanced {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-bottom: var(--space-8);
    }
    .video-card-modal {
      position: relative;
      border-radius: 12px;
      overflow: hidden;
      cursor: pointer;
      transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      background: var(--color-white);
      border: 1px solid var(--color-border);
    }
    .video-card-modal:hover {
      transform: translateY(-6px);
      box-shadow: 0 12px 40px rgba(0,0,0,0.12);
      border-color: rgba(0,95,218,0.2);
    }
    .video-thumb-modal {
      aspect-ratio: 16/9;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .video-card-modal .video-play-overlay {
      position: absolute;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: rgba(0,0,0,0.25);
      transition: background 0.3s;
    }
    .video-card-modal:hover .video-play-overlay {
      background: rgba(0,0,0,0.4);
    }
    .video-card-modal .video-play-circle {
      width: 48px;
      height: 48px;
      background: rgba(255,255,255,0.95);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(0,0,0,0.2);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .video-card-modal:hover .video-play-circle {
      transform: scale(1.1);
      background: var(--color-primary);
    }
    .video-card-modal:hover .video-play-circle svg {