html, body {
      max-width: 100%;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      height: auto;
    }
    html { scroll-behavior: smooth; }
    /* dark theme custom */
    .dark-bg-solid { background-color: #0b0e14; }
    .dark-card { background-color: #141b24; border: 1px solid #2a3745; }
    .glow-text { color: #fbbf24; }
    .hover-lift { transition: transform 0.25s ease, box-shadow 0.25s; }
    .hover-lift:hover { transform: translateY(-6px); box-shadow: 0 25px 30px -12px rgba(251, 191, 36, 0.15); }
    /* responsive section padding */
    .section-large { padding-top: 4rem; padding-bottom: 4rem; }
    @media (min-width: 768px) { .section-large { padding-top: 7rem; padding-bottom: 7rem; } }
    @media (min-width: 1024px) { .section-large { padding-top: 10rem; padding-bottom: 10rem; } }
    /* image overlay utility */
    .img-dark-overlay::after {
      content: ''; position: absolute; inset: 0;
      background: linear-gradient(145deg, #0b0e14 0%, transparent 70%);
      border-radius: 1.5rem; pointer-events: none;
    }
    /* mobile menu panel */
    .mobile-menu-open {
      display: block !important;
    }