/* ============================================
   RESPONSIVE CSS - BTRONIX
   Mobile optimization, hamburger menu, submenus
   ============================================ */

/* Tablet and below (max-width: 1024px) */
@media (max-width: 1024px) {
    .container {
        padding: 0 1.5rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .solutions-grid,
    .inventory-grid,
    .insights-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .lifecycle-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sustainability-grid,
    .whychoose-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
    /* Container padding */
    .container {
        padding: 0 1rem;
    }
    
    /* Typography scaling */
    .hero-title {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .cta-title {
        font-size: 1.75rem;
    }
    
    /* Stack all grids vertically */
    .solutions-grid,
    .inventory-grid,
    .insights-grid,
    .lifecycle-grid,
    .sustainability-grid,
    .whychoose-grid,
    .business-grid,
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    /* Stats grid specific */
    .stats-grid {
        gap: 1.5rem;
    }
    
    /* Hero section adjustments */
    .hero {
        min-height: auto;
        padding: 3rem 0;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
        text-align: center;
    }
    
    .hero-visual {
        height: 280px;
    }
    
    .hero-card {
        bottom: 1rem;
        left: 1rem;
        padding: 0.75rem;
        max-width: 200px;
    }
    
    /* Featured section */
    .featured-header {
        margin-bottom: 2rem;
    }
    
    .featured-header-text {
        max-width: 100%;
    }
    
    .featured-description {
        font-size: 0.875rem;
    }
    
    /* Business section */
    .business-header {
        margin-bottom: 2rem;
    }
    
    .business-description {
        font-size: 1rem;
    }
    
    .business-card {
        padding: 1.5rem;
    }
    
    /* Inventory items */
    .inventory-item {
        padding: 1rem 1.5rem;
    }
    
    /* Insight cards */
    .insight-card {
        height: auto;
        padding: 1.25rem;
    }
    
    .insight-title {
        font-size: 0.875rem;
        margin-top: 0.75rem;
    }
    
    /* Buttons full width on mobile */
    .btn {
        display: block;
        width: 100%;
        text-align: center;
        margin-bottom: 0.75rem;
        padding: 0.875rem 1rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: 0;
    }
    
    /* Centering text on mobile */
    .business-header,
    .featured-header-text,
    .insights-section .section-title,
    .sustainability-section .section-title,
    .whychoose-section .section-title,
    .core-positioning .section-title {
        text-align: center;
    }
    
    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    /* Section padding reduction */
    .solutions-section,
    .featured-section,
    .business-section,
    .sustainability-section,
    .whychoose-section,
    .insights-section,
    .cta-section,
    .lifecycle-section,
    .core-positioning {
        padding: 3rem 0;
    }
    
    .trust-strip {
        padding: 1.5rem 0;
    }
}

/* Small mobile (max-width: 480px) */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .hero-card {
        display: none;
    }
    
    .inventory-badge {
        font-size: 0.625rem;
        padding: 0.25rem 0.5rem;
    }
}

/* ============================================
   HAMBURGER MENU STYLES
   ============================================ */

/* Hide desktop navigation on mobile, show hamburger */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background-color: #0f172a;
        flex-direction: column;
        padding: 5rem 1.5rem 2rem;
        gap: 0;
        transition: left 0.3s ease;
        z-index: 1000;
        overflow-y: auto;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    }
    
    .nav-links.open {
        left: 0;
    }
    
    .nav-links a {
        display: block;
        padding: 0.875rem 0;
        font-size: 1.1rem;
        border-bottom: 1px solid #1e293b;
        width: 100%;
    }
    
    /* Submenu styles for mobile */
    .nav-links .has-submenu {
        position: relative;
    }
    
    .nav-links .submenu-toggle {
        position: absolute;
        right: 0;
        top: 0;
        background: none;
        border: none;
        color: #94a3b8;
        font-size: 1.2rem;
        padding: 0.875rem 1rem;
        cursor: pointer;
    }
    
    .nav-links .submenu {
        display: none;
        flex-direction: column;
        padding-left: 1rem;
        background-color: #1e293b;
        margin: 0.5rem -1rem 0.5rem -1rem;
        border-radius: 0.5rem;
    }
    
    .nav-links .submenu.open {
        display: flex;
    }
    
    .nav-links .submenu a {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
        border-bottom: none;
    }
    
    /* Hamburger button */
    .hamburger {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 22px;
        background: none;
        border: none;
        cursor: pointer;
        z-index: 1001;
        position: relative;
    }
    
    .hamburger span {
        display: block;
        width: 100%;
        height: 2px;
        background-color: white;
        transition: all 0.3s ease;
    }
    
    .hamburger.open span:nth-child(1) {
        transform: translateY(10px) rotate(45deg);
    }
    
    .hamburger.open span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.open span:nth-child(3) {
        transform: translateY(-10px) rotate(-45deg);
    }
    
    /* Menu overlay */
    .menu-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }
    
    .menu-overlay.active {
        display: block;
    }
    
    /* Hide desktop shop button on mobile, show inside menu */
    .btn-shop {
        display: none;
    }
    
    .nav-links .btn-shop-mobile {
        display: block;
        background-color: #10b981;
        color: white;
        text-align: center;
        padding: 0.875rem;
        border-radius: 0.5rem;
        margin-top: 1rem;
        font-weight: 600;
    }
}

/* Desktop submenu styles - clean without arrows */
@media (min-width: 769px) {
    .hamburger {
        display: none;
    }
    
    .menu-overlay {
        display: none;
    }
    
    .nav-links .btn-shop-mobile {
        display: none;
    }
    
    /* Hide submenu toggle button on desktop */
    .submenu-toggle {
        display: none;
    }
    
    /* Clean submenu on hover */
    .nav-links .has-submenu {
        position: relative;
    }
    
    .nav-links .submenu {
        position: absolute;
        top: 100%;
        left: 0;
        background-color: #0f172a;
        border: 1px solid #1e293b;
        border-radius: 0.5rem;
        padding: 0.5rem 0;
        min-width: 200px;
        opacity: 0;
        visibility: hidden;
        transition: all 0.2s ease;
        z-index: 100;
        list-style: none;
    }
    
    .nav-links .has-submenu:hover .submenu {
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links .submenu a {
        display: block;
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
        border-bottom: none;
        white-space: nowrap;
    }
    
    .nav-links .submenu a:hover {
        background-color: #1e293b;
    }
}