:root {
      /* --- LIGHT THEME VARIABLES --- */
      --bg: #f8fafc; /* Light gray background */
      --bg-alt: #ffffff; /* Pure white for containers */
      --bg-accent-light: #f1f5f9; /* Slightly darker white for headers/pills */
      
      --accent: #4f46e5; /* Keep the indigo accent for continuity */
      --accent-soft: rgba(79, 70, 229, 0.1);
      --accent-strong: #4338ca; /* Slightly darker indigo for text visibility */
      
      --text-main: #1e293b; /* Dark slate for main text */
      --text-muted: #64748b; /* Medium gray for secondary text */
      
      --border-subtle: #e2e8f0; /* Light gray border */
      --shadow-soft: 0 20px 40px rgba(148, 163, 184, 0.15); /* Soft, light shadow */
      --shadow-card: 0 14px 35px rgba(148, 163, 184, 0.2); /* Slightly stronger shadow for card */
      
      --radius-xl: 20px;
      --transition-fast: 0.2s ease-out;
      --transition-med: 0.35s ease-out;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: "Poppins", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background: radial-gradient(circle at top, var(--bg) 0%, #e2e8f0 100%); /* Light gradient */
      color: var(--text-main);
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 24px;
    }

    .page {
      width: 100%;
      max-width: 1100px;
    }

    .shell {
      background: var(--bg-alt);
      border-radius: 28px;
      border: 1px solid var(--border-subtle);
      padding: 22px 22px 26px;
      box-shadow: var(--shadow-soft);
      position: relative;
      overflow: hidden;
      /* Removed backdrop-filter blur as it's less necessary on solid white */
    }

    /* Subtle background decoration for the white shell */
    .shell::before {
      content: "";
      position: absolute;
      inset: -40%;
      background:
        radial-gradient(circle at 10% 0%, rgba(99, 102, 241, 0.08) 0, transparent 45%),
        radial-gradient(circle at 100% 0%, rgba(14, 165, 233, 0.08) 0, transparent 55%);
      opacity: 1;
      pointer-events: none;
      z-index: -1;
    }

    /* HEADER */

    .header {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 10px 14px 16px;
      border-radius: 18px;
      background: linear-gradient(135deg, var(--bg-accent-light), var(--bg-alt));
      border: 1px solid var(--border-subtle);
      position: relative;
      overflow: hidden;
    }

    .logo-wrapper {
      width: 46px;
      height: 46px;
      border-radius: 14px;
      background: radial-gradient(circle at 30% 0%, #4f46e5, #0ea5e9);
      padding: 3px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3); /* Softer shadow */
      position: relative;
      overflow: hidden;
      animation: floatLogo 4.5s ease-in-out infinite;
    }

    .logo-wrapper::after {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 0 0, rgba(255, 255, 255, 0.4) 0, transparent 65%);
      opacity: 0.55;
      pointer-events: none;
    }

    .logo {
      width: 100%;
      height: 100%;
      border-radius: 11px;
      object-fit: cover;
      border: 1px solid rgba(255, 255, 255, 0.9);
      background: #fff; /* Ensure logo has white background if transparent */
    }

    .header-text {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .header-title {
      font-size: 1.1rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-main);
    }

    .header-pill {
      font-size: 0.7rem;
      padding: 2px 9px;
      border-radius: 999px;
      border: 1px solid rgba(79, 70, 229, 0.3);
      background: rgba(79, 70, 229, 0.08); /* Lighter pill background */
      text-transform: none;
      font-weight: 600;
      color: var(--accent-strong);
    }

    .header-subtitle {
      font-size: 0.83rem;
      color: var(--text-muted);
    }

    .header-subtitle span {
      color: var(--accent-strong);
      font-weight: 500;
    }

    /* VIDEO CARD */

    .video-card {
      margin-top: 18px;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-subtle);
      background: var(--bg-alt); /* Pure white background */
      overflow: hidden;
      box-shadow: var(--shadow-card);
      position: relative;
      transform: translateY(16px);
      opacity: 0;
      transition:
        transform var(--transition-med),
        opacity var(--transition-med),
        box-shadow var(--transition-med),
        border-color var(--transition-med);
    }

    body.page-loaded .video-card {
      transform: translateY(0);
      opacity: 1;
    }

    .video-card:hover {
      box-shadow: 0 20px 45px rgba(148, 163, 184, 0.3);
      border-color: rgba(129, 140, 248, 0.4);
      transform: translateY(-3px);
    }

    .video-wrapper {
      position: relative;
      width: 100%;
      /* Aspect ratio 16:9 */
      aspect-ratio: 16 / 9;
      background: #000; /* Keep video background black for letterboxing */
      overflow: hidden;
    }

    /* Fallback for older browsers without aspect-ratio */
    @supports not (aspect-ratio: 16 / 9) {
      .video-wrapper {
        height: 0;
        padding-top: 56.25%;
      }
      .video-iframe, video {
        position: absolute;
        inset: 0;
      }
    }
    
    video {
        width: 100%;
        height: 100%;
        display: block;
    }


    /* GLOW EDGE */
    .video-glow {
      position: absolute;
      inset: 0;
      /* Toned down glow for light mode */
      background:
        radial-gradient(circle at 50% 0, rgba(99, 102, 241, 0.15) 0, transparent 60%),
        radial-gradient(circle at 0 100%, rgba(14, 165, 233, 0.15) 0, transparent 55%);
      mix-blend-mode: normal; /* Screen doesn't work well on light */
      opacity: 0.6;
      pointer-events: none;
    }

    /* REMOVED OVERLAY, PULSE RING, and PLAY ICON CSS HERE */

    /* INFO */

    .video-info {
      padding: 20px 24px; /* Slightly more padding for light theme airiness */
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .video-label {
      font-size: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 0.12em;
      color: var(--accent-strong);
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .video-label-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 8px rgba(79, 70, 229, 0.5);
    }

    .video-title {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 0.01em;
      color: var(--text-main);
      line-height: 1.3;
    }

    .video-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .meta-pill {
      padding: 4px 12px;
      border-radius: 999px;
      border: 1px solid var(--border-subtle);
      background: var(--bg-accent-light);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-weight: 500;
    }

    .meta-dot {
      width: 6px;
      height: 6px;
      border-radius: 999px;
      background: var(--accent);
    }

    .video-description {
      margin-top: 8px;
      font-size: 0.9rem;
      line-height: 1.7;
      color: var(--text-muted);
    }

    .video-description strong {
      color: var(--text-main);
      font-weight: 600;
    }

    .footer-strip {
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px solid var(--border-subtle); /* Solid border looks cleaner on light */
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8rem;
      color: var(--text-muted);
      gap: 8px;
      flex-wrap: wrap;
      font-weight: 500;
    }

    .footer-left {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .status-dot {
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: #16a34a; /* Slightly darker green for contrast */
      box-shadow: 0 0 8px rgba(22, 163, 74, 0.5);
    }

    .footer-right {
      opacity: 1;
      color: var(--accent-strong);
    }

    /* RESPONSIVE */

    @media (max-width: 768px) {
      .shell {
        padding: 18px 14px 20px;
        border-radius: 22px;
      }

      .header {
        padding: 10px 10px 12px;
        border-radius: 16px;
      }

      .logo-wrapper {
        width: 40px;
        height: 40px;
      }

      .header-title {
        font-size: 1rem;
      }

      .header-subtitle {
        font-size: 0.78rem;
      }

      .video-info {
        padding: 18px 16px;
      }

      .video-title {
        font-size: 1.1rem;
      }

      .video-description {
        font-size: 0.85rem;
      }
    }

    @media (max-width: 480px) {
      body {
        padding: 12px;
      }

      .shell {
        padding: 14px 12px 16px;
      }

      .header {
        gap: 10px;
      }

      .video-info {
        gap: 10px;
        padding: 16px 12px;
      }

      .footer-strip {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
      }
    }

    /* ANIMATIONS */

    @keyframes floatLogo {
      0%, 100% {
        transform: translateY(0);
      }
      50% {
        transform: translateY(-4px);
      }
    }