Constant MOBILE_BASE_STYLES 

pub const MOBILE_BASE_STYLES: &str = r#"
/* ============================================ */
/* MOBILE CSS VARIABLES                         */
/* ============================================ */
:root {
    /* Touch targets */
    --touch-min: 44px;
    --touch-comfortable: 48px;
    --touch-large: 56px;

    /* Mobile spacing */
    --mobile-padding: 12px;
    --mobile-gap: 8px;

    /* Safe area insets for notched devices */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --safe-right: env(safe-area-inset-right, 0px);

    /* Layout heights - standardized across app */
    --header-height: 72px;
    --footer-height-desktop: 280px;
    --footer-height-tablet: 360px;
    --footer-height-mobile: auto;

    /* Standardized breakpoints (as CSS custom properties for reference) */
    --breakpoint-mobile: 768px;
    --breakpoint-tablet: 1024px;
}

/* ============================================ */
/* MOBILE UTILITY CLASSES                       */
/* ============================================ */

/* Hide on mobile, show on desktop */
.desktop-only {
    display: block;
}

/* Show on mobile, hide on desktop */
.mobile-only {
    display: none;
}

@media (max-width: 768px) {
    .desktop-only {
        display: none !important;
    }
    .mobile-only {
        display: block !important;
    }
    .mobile-only-flex {
        display: flex !important;
    }
}

/* Touch-friendly button base */
.touch-target {
    min-width: var(--touch-min);
    min-height: var(--touch-min);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

/* Safe area padding utilities */
.safe-top {
    padding-top: max(var(--mobile-padding), var(--safe-top));
}

.safe-bottom {
    padding-bottom: max(var(--mobile-padding), var(--safe-bottom));
}

.safe-horizontal {
    padding-left: max(var(--mobile-padding), var(--safe-left));
    padding-right: max(var(--mobile-padding), var(--safe-right));
}

/* Smooth scrolling with momentum on iOS */
.scroll-smooth {
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
}

/* Prevent text selection on interactive elements */
.no-select {
    -webkit-user-select: none;
    user-select: none;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================ */
/* BODY SCROLL LOCK                            */
/* ============================================ */

/* Applied to body when mobile menu is open */
body.menu-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
    height: 100%;
}

/* ============================================ */
/* HAMBURGER MENU & OVERLAY                    */
/* ============================================ */

/* Hamburger button */
.hamburger-btn {
    display: none;
    width: var(--touch-comfortable);
    height: var(--touch-comfortable);
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    position: relative;
    z-index: 1001;
}

.hamburger-icon {
    width: 24px;
    height: 18px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.hamburger-line {
    width: 100%;
    height: 2px;
    background: var(--text-primary, #f0f0f0);
    border-radius: 1px;
    transition: all 0.3s ease;
    transform-origin: center;
}

/* Hamburger to X animation */
.hamburger-btn.open .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger-btn.open .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger-btn.open .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile menu overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(6, 8, 20, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    display: flex;
    flex-direction: column;
    padding: calc(var(--header-height) + 20px) var(--mobile-padding) var(--mobile-padding);
    overflow-y: auto;
}

.mobile-menu-overlay.open {
    opacity: 1;
    visibility: visible;
}

/* Mobile menu navigation links */
.mobile-menu-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 32px;
}

.mobile-menu-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary, #b0b0b0);
    text-decoration: none;
    font-size: 18px;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.mobile-menu-link:active {
    transform: scale(0.98);
    background: rgba(255, 255, 255, 0.08);
}

.mobile-menu-link.active {
    background: rgba(102, 126, 234, 0.15);
    color: var(--text-primary, #f0f0f0);
    border-color: rgba(102, 126, 234, 0.3);
}

.mobile-menu-link-icon {
    font-size: 20px;
    width: 24px;
    text-align: center;
}

/* Mobile menu CTAs */
.mobile-menu-ctas {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: auto;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.mobile-menu-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px 24px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.mobile-menu-cta.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.mobile-menu-cta.secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary, #f0f0f0);
}

/* Show hamburger on mobile/tablet */
@media (max-width: 1024px) {
    .hamburger-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .nav-links-desktop {
        display: none !important;
    }

    .nav-ctas-desktop {
        display: none !important;
    }
}

/* ============================================ */
/* TABLET-SPECIFIC ADJUSTMENTS                 */
/* ============================================ */

@media (min-width: 769px) and (max-width: 1024px) {
    .mobile-menu-overlay {
        padding: calc(var(--header-height) + 40px) 40px 40px;
    }

    .mobile-menu-link {
        padding: 18px 24px;
        font-size: 20px;
    }

    .mobile-menu-nav {
        max-width: 400px;
        margin: 0 auto 40px;
    }

    .mobile-menu-ctas {
        max-width: 400px;
        margin: auto auto 0;
    }
}
"#;

Include this in your root component (app.rs) for global mobile utilities