/* ==================== RESPONSIVE DESIGN ==================== */

/* Mobile: 320px - 767px (Portrait) */
@media (max-width: 767px) {
    .container {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    /* Navbar Mobile */
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background-color: var(--color-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-medium);
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link {
        display: block;
        padding: 1.5rem 0;
        border-bottom: 1px solid #eee;
    }

    /* Hero Section Mobile */
    .hero {
        padding: 3rem 1.5rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-cta {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .btn, .btn-large {
        width: 100%;
    }

    /* Grids to single column */
    .services-grid,
    .products-grid,
    .about-grid,
    .projects-grid,
    .channels-grid {
        grid-template-columns: 1fr !important;
    }

    .hero-regions {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .button-group {
        flex-direction: column;
    }

    .button-group .btn {
        width: 100%;
    }

    .action-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-content .footer-section {
        border-bottom: 1px solid #404040;
        padding-bottom: var(--spacing-lg);
    }

    /* Page header */
    .page-header {
        padding: 2rem 1rem;
    }
}

/* Tablet: 768px - 1023px */
@media (min-width: 768px) and (max-width: 1023px) {
    .container {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .services-grid,
    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .channels-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }

    .action-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop: 1024px - 1439px */
@media (min-width: 1024px) and (max-width: 1439px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .channels-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Large Desktop: 1440px+ */
@media (min-width: 1440px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .channels-grid {
        grid-template-columns: repeat(5, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ==================== HIGH RESOLUTION DISPLAYS ==================== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .channel-icon {
        font-size: 3.5rem;
    }

    .service-icon, .strength i, .feature i {
        font-size: 3.25rem;
    }
}

/* ==================== ACCESSIBILITY ==================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-white: #1a1a1a;
        --color-light-gray: #2a2a2a;
        --color-text-dark: #f0f0f0;
        --color-text-light: #b0b0b0;
    }

    body {
        background-color: var(--color-white);
    }

    .service-card,
    .about-item,
    .strength,
    .region-detail,
    .contact-info-card {
        background-color: #2a2a2a;
        color: #f0f0f0;
    }

    .form-group input,
    .form-group textarea {
        background-color: #2a2a2a;
        color: #f0f0f0;
        border-color: #404040;
    }

    .project-card {
        background-color: #2a2a2a;
        border-color: #404040;
        color: #f0f0f0;
    }

    .channel-card {
        background-color: #2a2a2a;
        color: #f0f0f0;
    }

    .channel-card.featured {
        background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    }
}

/* ==================== PRINT ==================== */
@media print {
    .navbar,
    .footer,
    .btn,
    .contact-form {
        display: none;
    }

    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }

    a {
        text-decoration: underline;
    }
}

/* ==================== ULTRA-WIDE SCREENS (2560px+) ==================== */
@media (min-width: 2560px) {
    .container {
        max-width: 80%;
    }

    h1 { font-size: 3.5rem; }
    h2 { font-size: 2.75rem; }
    h3 { font-size: 2rem; }

    .services-grid,
    .products-grid,
    .about-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .channels-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}