/* responsive.css - Responsive Design */

/* Tablet */
@media (max-width: 1024px) {
    :root {
        --font-size-7xl: 3.5rem;
        --font-size-4xl: 2rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .hero-title {
        font-size: var(--font-size-6xl);
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --font-size-7xl: 2.5rem;
        --font-size-6xl: 2rem;
        --font-size-4xl: 1.75rem;
        --spacing-4xl: 4rem;
    }
    
    .section-padding {
        padding: var(--spacing-3xl) 0;
    }
    
    /* Mobile Menu */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-lg);
        transition: right var(--transition-base);
        box-shadow: var(--shadow-2xl);
        z-index: 99;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .hamburger {
        display: flex;
        flex-direction: column;
        gap: 6px;
        cursor: pointer;
        z-index: 100;
    }
    
    .hamburger span {
        width: 25px;
        height: 2px;
        background: var(--color-gray-800);
        transition: all var(--transition-base);
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .btn-header {
        display: none;
    }
    
    /* Hero Section */
    .hero {
        min-height: 600px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .stat-item {
        text-align: center;
    }
    
    /* Differentials */
    .differentials-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Applications */
    .applications-grid {
        grid-template-columns: 1fr;
    }
    
    /* ESG */
    .esg-pillars {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .pillar {
        align-items: center;
        text-align: center;
        flex-direction: column;
    }
    
    /* Footer */
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    /* Solutions */
    .solution-features {
        grid-template-columns: 1fr;
    }
    
    .solution-content {
        padding: var(--spacing-lg);
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: var(--font-size-5xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .card {
        padding: var(--spacing-lg);
    }
    
    .cta-title {
        font-size: var(--font-size-3xl);
    }
}