/* ---- Database-themed background ---- */
    body {
      background-color: #050e18;
      background-image:
        /* faint hex grid overlay */
        url("images/data_image2.png");
      background-size: cover;
      background-position: center top;
      background-repeat: no-repeat;
      background-attachment: fixed;
      min-height: 100vh;
      position: relative;
    }
    /* dark tint + blue data atmosphere over the bg image */
    body::before {
      content: '';
      position: fixed; inset: 0;
      background:
        radial-gradient(ellipse at 70% 30%, rgba(0, 80, 180, 0.28) 0%, transparent 55%),
        radial-gradient(ellipse at 20% 80%, rgba(0, 180, 120, 0.18) 0%, transparent 50%),
        linear-gradient(160deg, rgba(3, 10, 28, 0.88) 0%, rgba(5, 20, 50, 0.82) 50%, rgba(3, 15, 30, 0.92) 100%);
      z-index: 0;
      pointer-events: none;
    }
    /* Subtle animated circuit lines drawn in CSS */
    body::after {
      content: '';
      position: fixed; inset: 0;
      background-image:
        repeating-linear-gradient(0deg,   transparent, transparent 59px, rgba(0,160,255,0.04) 60px),
        repeating-linear-gradient(90deg,  transparent, transparent 59px, rgba(0,160,255,0.04) 60px);
      z-index: 0;
      pointer-events: none;
    }
    main, nav, footer { position: relative; z-index: 1; }

    /* ---- Page hero ---- */
    .page-hero {
      padding: 130px 2rem 3.5rem;
      text-align: center;
    }
    .page-hero .eyebrow {
      font-family: 'Syne', sans-serif;
      font-size: 0.78rem; font-weight: 700;
      letter-spacing: 0.22em; text-transform: uppercase;
      color: #38bdf8; margin-bottom: 0.75rem;
      display: block;
    }
    .page-hero h1 {
      font-family: 'Syne', sans-serif; font-weight: 800;
      font-size: clamp(2rem, 5vw, 3.5rem);
      color: #fff; line-height: 1.1;
      margin-bottom: 1rem;
      display: block;
      background: none; box-shadow: none; border: none;
    }
    .page-hero h1 em { color: #38bdf8; font-style: normal; }
    .page-hero p {
      color: rgba(255,255,255,0.6);
      font-size: 1.05rem; max-width: 620px; margin: 0 auto;
    }

    /* ---- Tech badges ---- */
    .tech-badges {
      display: flex; flex-wrap: wrap; gap: 0.6rem;
      justify-content: center; padding: 1.5rem 2rem 2rem;
    }
    .badge-tech {
      background: rgba(0,80,180,0.3);
      color: #38bdf8;
      font-family: 'Syne', sans-serif;
      font-size: 0.75rem; font-weight: 700;
      letter-spacing: 0.1em; text-transform: uppercase;
      padding: 6px 16px; border-radius: 50px;
      border: 1px solid rgba(56,189,248,0.35);
    }

    /* ---- Vision strip ---- */
    .about-strip {
      background: rgba(56,189,248,0.05);
      border-top: 1px solid rgba(56,189,248,0.15);
      border-bottom: 1px solid rgba(56,189,248,0.15);
      padding: 3rem 2rem;
      text-align: center;
      margin: 0 0 2.5rem;
    }
    .about-strip h2 {
      font-family: 'Syne', sans-serif; font-weight: 800;
      font-size: 1.35rem; color: #fff;
      text-align: center; margin-bottom: 0.8rem;
      background: none; text-transform: none;
    }
    .about-strip p {
      color: rgba(255,255,255,0.62);
      max-width: 720px; margin: 0 auto;
      font-size: 1rem; line-height: 1.8;
    }

    /* ---- Feature rows (same pattern as Project 3 screenshot grid but full-width rows) ---- */
    .feature-row {
      display: flex;
      flex-direction: column;
      gap: 2rem;
      max-width: 960px;
      margin: 0 auto 4rem;
      padding: 0 2rem;
    }
    .feature-item {
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(56,189,248,0.14);
      border-radius: 16px;
      padding: 2rem 2.5rem;
      display: flex;
      gap: 2.5rem;
      align-items: center;
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      transition: all 0.3s ease;
    }
    .feature-item:hover {
      background: rgba(56,189,248,0.06);
      border-color: rgba(56,189,248,0.32);
      transform: translateX(6px);
      box-shadow: 0 12px 48px rgba(0,80,180,0.3),
                  inset 0 0 0 1px rgba(56,189,248,0.1);
    }
    /* Alternate: even cards push image to right */
    .feature-item.reverse { flex-direction: row-reverse; }
    .feature-item.reverse:hover { transform: translateX(-6px); }

    .feature-item img {
      width: 340px;
      min-width: 260px;
      max-width: 380px;
      height: auto;
      border-radius: 10px;
      border: 1px solid rgba(56,189,248,0.2);
      box-shadow: 0 8px 32px rgba(0,0,0,0.5);
      flex-shrink: 0;
      object-fit: cover;
    }
    .feature-item-text { flex: 1; }
    .feature-item-text h2 {
      font-family: 'Syne', sans-serif;
      font-size: 1rem; font-weight: 700;
      color: #38bdf8;
      text-transform: uppercase; letter-spacing: 0.08em;
      margin-bottom: 0.65rem;
    }
    .feature-item-text p {
      font-size: 0.95rem;
      color: rgba(255,255,255,0.65);
      line-height: 1.75;
    }

    /* data pulse glow on hover */
    @keyframes dataGlow {
      0%, 100% { box-shadow: 0 0 16px rgba(56,189,248,0.3), 0 8px 32px rgba(0,0,0,0.5); }
      50%       { box-shadow: 0 0 36px rgba(56,189,248,0.55), 0 8px 32px rgba(0,0,0,0.5); }
    }
    .feature-item:hover img { animation: dataGlow 2s ease infinite; }

    /* clickable zoom cursor + hint text */
    .feature-item img { cursor: zoom-in; }
    .zoom-hint {
      display: block;
      font-size: 0.72rem;
      color: rgba(56,189,248,0.55);
      letter-spacing: 0.1em;
      text-transform: uppercase;
      margin-top: 0.4rem;
      text-align: center;
      font-family: 'Syne', sans-serif;
      font-weight: 600;
      user-select: none;
      transition: color 0.2s;
    }
    .feature-item:hover .zoom-hint { color: rgba(56,189,248,0.9); }

    /* ---- Lightbox ---- */
    #lightbox {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 9999;
      background: rgba(3, 10, 28, 0.96);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      align-items: center;
      justify-content: center;
      cursor: zoom-out;
    }
    #lightbox.active {
      display: flex;
      animation: lbFadeIn 0.22s ease;
    }
    @keyframes lbFadeIn { from { opacity:0; } to { opacity:1; } }

    #lightbox img {
      max-width: 90vw;
      max-height: 86vh;
      border-radius: 14px;
      border: 1.5px solid rgba(56,189,248,0.4);
      box-shadow: 0 0 90px rgba(56,189,248,0.22), 0 28px 80px rgba(0,0,0,0.75);
      cursor: zoom-out;
      animation: lbZoomIn 0.28s cubic-bezier(0.22,1,0.36,1);
    }
    @keyframes lbZoomIn {
      from { transform: scale(0.80); opacity:0; }
      to   { transform: scale(1);    opacity:1; }
    }

    #lightbox-close {
      position: fixed;
      top: 20px; right: 28px;
      background: none; border: none;
      font-size: 2.4rem; line-height: 1;
      color: rgba(255,255,255,0.65);
      cursor: pointer; z-index: 10000;
      transition: color 0.2s, transform 0.2s;
    }
    #lightbox-close:hover { color: #38bdf8; transform: rotate(90deg) scale(1.2); }

    #lightbox-caption {
      position: fixed;
      bottom: 24px; left: 0; right: 0;
      text-align: center;
      font-family: 'Syne', sans-serif;
      font-size: 0.8rem; font-weight: 700;
      letter-spacing: 0.12em; text-transform: uppercase;
      color: rgba(56,189,248,0.7);
      pointer-events: none;
    }

    @media (max-width: 680px) {
      .feature-item, .feature-item.reverse { flex-direction: column; }
      .feature-item img { width: 100%; max-width: 100%; min-width: unset; }
      .feature-item:hover, .feature-item.reverse:hover { transform: translateY(-4px); }
    }