/* ==========================================================================
   assets/css/responsive.css
   Structural Breakpoint System Engine (Mobile First Component Architecture)
   ========================================================================== */

@media (max-width: 1200px) {
    .hero-title { font-size: 3.6rem; }
    :root { --container-width: 960px; }
}

@media (max-width: 992px) {
    :root { --container-width: 720px; }
    
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
    
    /* Responsive Transformation Header Menu Screen */
    .mobile-toggle {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 22px; height: 16px;
        background: transparent; border: none; cursor: pointer;
    }
    
    .mobile-toggle .bar {
        width: 100%; height: 2px; background-color: var(--color-text-dark-menu);
        border-radius: 2px; transition: var(--transition-standard);
    }
    
    .site-header.scrolled .mobile-toggle .bar {
        background-color: var(--color-text-dark-menu);
    }
    
    .nav-menu {
        position: fixed; top: 0; right: -100%;
        width: 300px; height: 100vh;
        background-color: #ffffff;
        padding: 90px 30px;
        box-shadow: -10px 0 30px rgba(0,0,0,0.15);
        transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }
    
    .nav-menu.active { right: 0; }
    .nav-list { flex-direction: column; align-items: flex-start; gap: 20px; }
    .nav-link { color: var(--color-text-dark-menu); font-size: 1.05rem; }
    
    .btn-header { display: none; }
    
    /* Mobile Accordion Interaction State */
    .dropdown-menu {
        position: relative; top: 0; left: 0; transform: none !important;
        opacity: 1; visibility: visible; pointer-events: auto;
        box-shadow: none; background: rgba(0,0,0,0.03);
        width: 100%; display: none; margin-top: 8px;
    }
    .dropdown-menu.open { display: block; }
    
    .footer-main-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
    :root { --container-width: 540px; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    
    .hero-title { font-size: 2.6rem; }
    .section-title { font-size: 2rem; }
    
    .about-preview-section .grid-2 {
        display: flex; flex-direction: column-reverse; gap: 44px;
    }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2.1rem; }
    .hero-actions { flex-direction: column; width: 100%; }
    .hero-actions .btn { width: 100%; }
    .counter-grid { grid-template-columns: 1fr; text-align: center; gap: 24px; }
}