/* -------------------------------------------------------------
 * mobile.css - Mobile Responsive Breakpoint Overrides (< 1024px)
 * Follows Mobile-First approach; optimizes UX for smaller touchscreens
 * ------------------------------------------------------------- */

@media (max-width: 1023px) {
    /* Responsive margins scaling */
    :root {
        --space-lg: clamp(1.75rem, 3.5vw, 2.5rem);
        --space-xl: clamp(3rem, 5vw, 4.5rem);
    }

    section {
        padding-top: var(--space-md);
        padding-bottom: var(--space-md);
    }

    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    /* 1. Eliminate bulky Stacked Top Info Bar on Mobile viewports */
    .top-header-bar {
        display: none !important;
    }

    /* 2. Compact Sticky Site Header Navigation */
    .site-nav {
        height: 70px !important;
    }

    .site-header.shrink .site-nav {
        height: 70px !important;
    }

    /* Group and align right-side controls nicely using flex margin rules */
    .logo-link {
        margin-right: auto;
        gap: 0.5rem;
    }

    .logo-svg {
        height: 38px !important;
        width: auto !important;
    }

    .logo-main-text {
        font-size: 0.95rem !important;
        font-weight: 800 !important;
    }

    .logo-sub-text {
        font-size: 0.58rem !important;
    }

    /* Spacer between Theme toggle wrapper and Hamburger button */
    .nav-actions {
        margin-right: 0.75rem !important;
    }

    /* Collapse the standard nav menu & CTA */
    .nav-menu,
    .nav-actions .btn {
        display: none !important;
    }

    /* Mobile Hamburger Trigger Base */
    .nav-toggle {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 18px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 0;
        z-index: 2000;
        transition: var(--transition-smooth);
    }

    /* Close (Cross) State Override to escape header stacking context */
    .nav-toggle.open {
        position: fixed !important;
        top: 24px !important;
        right: 20px !important;
        z-index: 2500 !important;
    }

    .nav-toggle span {
        display: block;
        width: 100%;
        height: 2px;
        background-color: var(--text-main);
        border-radius: 2px;
        transition: var(--transition-smooth);
        transform-origin: left center;
    }

    .nav-toggle.open span {
        background-color: var(--primary) !important; /* Force visible close button on white drawer background */
    }

    /* Morphing Hamburger animation */
    .nav-toggle.open span:nth-child(1) {
        transform: rotate(45deg) translate(2px, -2px);
    }

    .nav-toggle.open span:nth-child(2) {
        width: 0%;
        opacity: 0;
    }

    .nav-toggle.open span:nth-child(3) {
        transform: rotate(-45deg) translate(2px, 2px);
    }

    /* Collapsing navigation drawer overlays */
    .mobile-drawer-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0,0,0,0.5);
        backdrop-filter: blur(4px);
        z-index: 1400;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.4s ease;
    }

    .mobile-drawer-overlay.active {
        opacity: 1;
        pointer-events: all;
    }

    /* 3. Slide-out Drawer Scrollability & Height Fixes */
    .mobile-drawer {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 320px;
        height: 100vh;
        height: 100dvh; /* dynamic height support to exclude mobile browser navigation bars */
        background-color: var(--bg-card);
        border-left: 1px solid var(--border-color);
        box-shadow: var(--shadow-primary);
        z-index: 1500;
        /* Bottom padding 80px guarantees footer buttons do not get cut off by browser search bars */
        padding: 80px var(--space-sm) 80px var(--space-sm) !important;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
        will-change: transform;
        overflow-y: auto; /* Standard scrollability on short viewport heights */
        -webkit-overflow-scrolling: touch; /* Momentum scrolling for iOS */
    }

    .mobile-drawer.open {
        transform: translateX(-100%);
    }

    .mobile-drawer-list {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .mobile-drawer-link {
        font-size: 1.25rem;
        font-weight: 700;
        color: var(--text-main);
        text-decoration: none;
        display: block;
        padding: 0.5rem 0;
        transition: var(--transition-fast);
    }

    .mobile-drawer-link:hover,
    .mobile-drawer-link.active {
        color: var(--primary);
        padding-left: 0.4rem;
    }

    .mobile-drawer-footer {
        border-top: 1px solid var(--border-color);
        padding-top: var(--space-sm);
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
        margin-top: 2.5rem !important; /* Ensure separation in drawer scroll */
    }
}

@media(max-width: 767px) {
    /* Stack grid elements to 1 column on phones */
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }

    /* 4. Optimized Floating Action Widgets */
    .floating-action-group {
        bottom: 16px !important;
        right: 16px !important;
        gap: 0.6rem !important;
    }

    .floating-widget {
        width: 44px !important;
        height: 44px !important;
        opacity: 0.85 !important;
        box-shadow: 0 4px 12px rgba(0,0,0,0.2) !important;
    }

    .floating-widget:hover,
    .floating-widget:active {
        opacity: 1 !important;
        transform: scale(1.05) translateY(-2px) !important;
    }

    .floating-widget svg {
        width: 20px !important;
        height: 20px !important;
    }

    /* 5. Safe scroll bottom margins for mega-footers */
    .site-footer {
        padding-bottom: 80px !important;
    }
}

/* 6. High-density Small Devices Adaptation */
@media (max-width: 380px) {
    .logo-svg {
        height: 32px !important;
    }

    .logo-main-text {
        font-size: 0.82rem !important;
    }

    .logo-sub-text {
        font-size: 0.52rem !important;
    }
    
    .nav-actions {
        margin-right: 0.5rem !important;
    }
}