/* Responsibility: mobile navigation drawer, hamburger states, and mobile submenu styling. */

/* ===== 03. MOBILE NAVIGATION / DRAWER ===== */
      .mobile-menu {
        position: fixed;
        top: var(--nav-h);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--off-black);
        border-top: 1px solid var(--border);
        z-index: 7999;
        overflow-y: auto;
        transform: translateX(100%);
        transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
        display: flex;
        flex-direction: column;
      }
      .mobile-menu.open {
        transform: translateX(0);
      }
      .mobile-menu-inner {
        padding: 8px 24px 24px;
        flex: 1;
      }
      .mobile-nav-item {
        border-bottom: 1px solid var(--border);
      }
      .mobile-nav-link {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 16px 0;
        font-family: var(--font-mono);
        font-size: 11px;
        letter-spacing: 2px;
        text-transform: uppercase;
        color: var(--white);
        text-decoration: none;
        background: transparent;
        border: none;
        width: 100%;
        text-align: left;
        cursor: pointer;
      }
      .mobile-nav-link:hover,
      .mobile-nav-link.active {
        color: var(--lime);
      }
      .mobile-nav-link svg {
        width: 11px;
        height: 11px;
        transition: transform 0.25s;
        flex-shrink: 0;
      }
      .mobile-nav-item.open > .mobile-nav-link svg {
        transform: rotate(180deg);
      }
      .mobile-sub {
        overflow: hidden;
        max-height: 0;
        transition: max-height 0.3s ease;
      }
      .mobile-nav-item.open .mobile-sub {
        max-height: 400px;
      }
      .mobile-sub-inner {
        padding: 4px 0 12px;
      }
      .mobile-sub-link {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 11px 16px;
        font-family: var(--font-mono);
        font-size: 10px;
        letter-spacing: 1.5px;
        text-transform: uppercase;
        color: var(--muted);
        text-decoration: none;
        transition: color 0.15s;
      }
      .mobile-sub-link:hover {
        color: var(--lime);
      }
      .mobile-sub-link .mob-emoji {
        font-size: 15px;
        line-height: 1;
      }
      .mobile-menu-ctas {
        padding: 20px 24px 32px;
        border-top: 1px solid var(--border);
        display: flex;
        flex-direction: column;
        gap: 10px;
      }
      .mobile-menu-ctas .nav-cta {
        text-align: center;
        padding: 15px;
        display: block;
      }
      .mob-ghost {
        font-family: var(--font-mono);
        font-size: 10px;
        letter-spacing: 1.5px;
        text-transform: uppercase;
        color: var(--muted);
        border: 1px solid var(--border);
        padding: 13px;
        text-align: center;
        text-decoration: none;
        display: block;
        transition:
          border-color 0.2s,
          color 0.2s;
      }
      .mob-ghost:hover {
        border-color: var(--lime);
        color: var(--lime);
      }

/* ----- 07D. Mobile Navigation Refinements ----- */
      .mobile-menu {
        background:
          radial-gradient(
            circle at 82% 14%,
            rgba(200, 255, 0, 0.08),
            transparent 24%
          ),
          linear-gradient(
            180deg,
            rgba(10, 13, 16, 0.98) 0%,
            rgba(8, 10, 12, 0.99) 100%
          );
        border-top: 1px solid var(--line-soft);
      }
      .mobile-menu-inner {
        padding: 18px 24px 26px;
      }
      .mobile-menu-lead {
        margin-bottom: 18px;
        padding: 16px 18px;
        border: 1px solid rgba(255, 255, 255, 0.08);
        border-radius: var(--radius-sm);
        background: rgba(255, 255, 255, 0.02);
        font-size: 14px;
        line-height: 1.7;
        color: var(--text-muted);
      }
      .mobile-nav-item {
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      }
      .mobile-nav-link {
        padding: 18px 0;
        font-size: 12px;
        letter-spacing: 1.6px;
      }
      .mobile-sub-inner {
        padding: 2px 0 18px;
        display: grid;
        gap: 10px;
      }
      .mobile-sub-label {
        font-family: var(--font-mono);
        font-size: 10px;
        letter-spacing: 1.5px;
        text-transform: uppercase;
        color: var(--text-soft);
        margin-bottom: 2px;
      }
      .mobile-sub-link {
        padding: 12px;
        border-radius: var(--radius-sm);
        background: rgba(255, 255, 255, 0.02);
        border: 1px solid rgba(255, 255, 255, 0.04);
        color: var(--text-secondary);
      }
      .mobile-sub-link:hover {
        color: var(--text-primary);
        border-color: rgba(200, 255, 0, 0.2);
        background: rgba(200, 255, 0, 0.06);
      }
      .mob-emoji {
        width: 40px;
        height: 40px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 14px;
        font-size: 17px;
        background: rgba(200, 255, 0, 0.09);
        border: 1px solid rgba(200, 255, 0, 0.12);
      }
      .mobile-sub-copy {
        display: flex;
        flex-direction: column;
        gap: 2px;
      }
      .mobile-sub-title {
        font-family: var(--font-display);
        font-size: 22px;
        line-height: 0.95;
        letter-spacing: 0.8px;
      }
      .mobile-sub-desc {
        font-size: 13px;
        line-height: 1.45;
        color: var(--text-soft);
      }
      .mobile-menu-ctas {
        padding: 18px 24px 28px;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        gap: 12px;
        background: rgba(0, 0, 0, 0.12);
      }