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

/* Large Desktop */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .section-title {
        font-size: 2.75rem;
    }
}

/* Desktop */
@media (max-width: 1199px) {
    .hero-content {
        gap: var(--space-12);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* Tablet */
@media (max-width: 991px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    /* Navigation */
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--background-secondary);
        border-top: 1px solid var(--border-color);
        flex-direction: column;
        padding: var(--space-4);
        gap: var(--space-4);
        box-shadow: var(--shadow-lg);
        z-index: 1000;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
        flex-direction: column;
        gap: 4px;
        cursor: pointer;
        padding: var(--space-2);
    }
    
    .nav-toggle span {
        width: 24px;
        height: 2px;
        background-color: var(--text-primary);
        transition: all var(--transition-base);
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    /* Hero Section */
    .hero {
        padding: var(--space-16) 0 var(--space-12);
        min-height: 60vh;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.25rem;
        line-height: 1.2;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: var(--space-3);
    }
    
    .hero-actions .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .hero-stats {
        justify-content: center;
        gap: var(--space-6);
    }
    
    /* Features Section */
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
    
    /* Pricing Section */
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .pricing-card {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .pricing-units-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
    
    .multipliers-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
    
    .examples-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
    
    /* Billing Engine Section */
    .billing-features .feature-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .architecture-flow {
        flex-direction: column;
        gap: var(--space-6);
    }
    
    .flow-arrow {
        transform: rotate(90deg);
    }
}

/* Mobile */
@media (max-width: 767px) {
    .container {
        padding: 0 var(--space-3);
    }
    
    /* Navigation */
    .nav-container {
        padding: var(--space-3);
    }
    
    .nav-brand-text {
        font-size: var(--font-size-lg);
    }
    
    .nav-menu {
        padding: var(--space-6);
    }
    
    .nav-link {
        padding: var(--space-3);
        font-size: var(--font-size-lg);
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
    
    /* Hero Section */
    .hero {
        padding: var(--space-12) 0 var(--space-8);
        min-height: 50vh;
    }
    
    .hero-title {
        font-size: 1.875rem;
        line-height: 1.3;
    }
    
    .hero-description {
        font-size: var(--font-size-base);
        line-height: 1.6;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .hero-actions .btn {
        width: 100%;
        padding: var(--space-4) var(--space-6);
        font-size: var(--font-size-lg);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-4);
    }
    
    .stat {
        text-align: center;
    }
    
    /* Section Headers */
    .section-header {
        margin-bottom: var(--space-12);
    }
    
    .section-title {
        font-size: 1.75rem;
        line-height: 1.3;
    }
    
    .section-description {
        font-size: var(--font-size-base);
    }
    
    /* Features Section */
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .feature-card {
        padding: var(--space-6);
    }
    
    .feature-title {
        font-size: var(--font-size-xl);
    }
    
    /* Competitive Comparison */
    .comparison-table {
        overflow-x: auto;
        margin: 0 calc(-1 * var(--space-3));
        padding: 0 var(--space-3);
    }
    
    .comparison-header,
    .comparison-row {
        min-width: 600px;
        display: grid;
        grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr;
        gap: var(--space-3);
        padding: var(--space-3);
    }
    
    .comparison-feature {
        font-weight: 600;
        color: var(--text-primary);
    }
    
    .comparison-brahma,
    .comparison-competitor {
        font-size: var(--font-size-sm);
        text-align: center;
    }
    
    /* Pricing Section */
    .pricing-units-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .pricing-unit {
        padding: var(--space-6);
    }
    
    .multipliers-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .multiplier-card {
        padding: var(--space-6);
    }
    
    .examples-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .example-card {
        padding: var(--space-6);
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .benefit-item {
        padding: var(--space-6);
    }
    
    /* Billing Engine Section */
    .billing-features .feature-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .billing-feature {
        padding: var(--space-6);
    }
    
    .dashboard-content {
        grid-template-columns: 1fr;
        gap: var(--space-4);
        padding: var(--space-6);
    }
    
    .dashboard-footer {
        flex-direction: column;
        gap: var(--space-3);
        text-align: center;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-2);
    }
    
    /* Navigation */
    .nav-container {
        padding: var(--space-2);
    }
    
    .nav-brand-text {
        font-size: var(--font-size-base);
    }
    
    /* Hero Section */
    .hero {
        padding: var(--space-8) 0 var(--space-6);
    }
    
    .hero-title {
        font-size: 1.5rem;
        line-height: 1.4;
    }
    
    .hero-description {
        font-size: var(--font-size-sm);
    }
    
    .hero-badge span {
        font-size: var(--font-size-sm);
        padding: var(--space-2) var(--space-3);
    }
    
    /* Section Headers */
    .section-title {
        font-size: 1.5rem;
    }
    
    .section-description {
        font-size: var(--font-size-sm);
    }
    
    /* Buttons */
    .btn {
        padding: var(--space-3) var(--space-4);
        font-size: var(--font-size-base);
    }
    
    .btn-large {
        padding: var(--space-4) var(--space-6);
        font-size: var(--font-size-lg);
    }
    
    /* Cards */
    .feature-card,
    .pricing-card,
    .pricing-unit,
    .multiplier-card,
    .example-card,
    .benefit-item,
    .billing-feature {
        padding: var(--space-4);
    }
    
    /* Dashboard */
    .dashboard-header {
        flex-direction: column;
        gap: var(--space-3);
        text-align: center;
        padding: var(--space-4);
    }
    
    .dashboard-content {
        padding: var(--space-4);
    }
    
    .metric-value {
        font-size: var(--font-size-lg);
    }
}

/* Landscape Mobile */
@media (max-width: 767px) and (orientation: landscape) {
    .hero {
        min-height: 40vh;
        padding: var(--space-8) 0;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero-image,
    .feature-icon img,
    .nav-logo img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .nav-menu {
        background-color: var(--background-secondary);
        border-top-color: var(--border-color);
    }
    
    .nav-link {
        color: var(--text-primary);
    }
    
    .nav-link:hover {
        background-color: var(--background-tertiary);
    }
}

/* Focus Styles */
@media (prefers-reduced-motion: no-preference) {
    .btn:focus,
    .nav-link:focus,
    .feature-card:focus {
        outline: 2px solid var(--primary-color);
        outline-offset: 2px;
    }
}

/* Print Styles */
@media print and (max-width: 767px) {
    .container {
        max-width: none;
        padding: 0;
    }
    
    .hero-content,
    .features-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .props-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
}

/* Contact Section */
.contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

.contact-info {
    text-align: center;
}

.contact-form {
    padding: var(--space-6);
}

/* Screenshots Section */
.carousel-tabs {
    flex-direction: column;
    gap: var(--space-2);
}

.carousel-tab {
    width: 100%;
    text-align: center;
}

.screenshot-caption {
    padding: var(--space-6);
}

.screenshot-caption h4 {
    font-size: var(--font-size-lg);
}

.screenshot-caption p {
    font-size: var(--font-size-base);
}

/* Footer */
.footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
}

.footer-links {
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

.footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
}

.footer-legal {
    flex-direction: column;
    gap: var(--space-2);
}