/* ===== Responsive Design ===== */

/* Large Tablet (768px - 1023px) */
@media (max-width: 1023px) {
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stories-grid {
        grid-template-columns: 1fr;
    }

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

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

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

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

    .results-comparison {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        gap: 32px;
    }

    .persona-info h1 {
        font-size: 36px;
    }

    .main-nav ul {
        gap: 20px;
    }
}

/* Small Tablet (600px - 767px) */
@media (max-width: 767px) {
    .container {
        padding: 0 16px;
    }

    /* Header Mobile */
    .header-content {
        position: relative;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: -280px;
        width: 280px;
        height: 100vh;
        background: var(--bg-white);
        box-shadow: var(--shadow-lg);
        padding: 80px 24px 24px;
        transition: right var(--transition);
        z-index: 1000;
    }

    .main-nav.active {
        right: 0;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }

    .main-nav ul li {
        border-bottom: 1px solid var(--border-color);
    }

    .main-nav ul li:last-child {
        border-bottom: none;
    }

    .main-nav a {
        display: block;
        padding: 14px 0;
    }

    .main-nav a::after {
        display: none;
    }

    /* Mobile Menu Overlay */
    .menu-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }

    .menu-overlay.active {
        display: block;
    }

    /* Mobile Menu Toggle Animation */
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* Header CTA */
    .header-cta .btn {
        padding: 8px 16px;
        font-size: 14px;
    }

    /* Hero Persona */
    .hero-persona {
        padding: 48px 0;
    }

    .persona-intro {
        flex-direction: column;
        gap: 20px;
        margin-bottom: 40px;
    }

    .persona-avatar {
        width: 120px;
        height: 120px;
    }

    .persona-info h1 {
        font-size: 32px;
    }

    .persona-title {
        font-size: 16px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }

    .stat-card {
        display: flex;
        align-items: center;
        gap: 16px;
        text-align: left;
        padding: 16px 20px;
    }

    .stat-card i {
        font-size: 24px;
        margin-bottom: 0;
    }

    .stat-number {
        font-size: 24px;
    }

    /* Categories */
    .categories-section {
        padding: 48px 0;
    }

    .categories-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    /* Stories */
    .featured-stories {
        padding: 48px 0;
    }

    .story-image {
        height: 200px;
    }

    .story-card:first-child .story-image {
        height: 240px;
    }

    .story-content {
        padding: 20px;
    }

    .story-content h3 {
        font-size: 18px;
    }

    .story-highlights {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .story-cost {
        flex-direction: column;
        align-items: flex-start;
    }

    /* Features */
    .why-choose {
        padding: 48px 0;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .feature-item {
        padding: 20px 16px;
    }

    /* Articles List */
    .latest-articles {
        padding: 48px 0;
    }

    .article-list-item {
        grid-template-columns: 1fr;
    }

    .article-thumb {
        height: 200px;
    }

    .article-info {
        padding: 16px;
    }

    .article-info h3 {
        font-size: 18px;
    }

    /* CTA */
    .cta-section {
        padding: 48px 0;
    }

    .cta-content h2 {
        font-size: 24px;
    }

    .cta-content p {
        font-size: 16px;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .cta-services {
        grid-template-columns: 1fr 1fr;
    }

    /* Article Page */
    .article-header h1 {
        font-size: 22px;
    }

    .article-meta-info {
        flex-direction: column;
        gap: 8px;
    }

    .article-body {
        font-size: 15px;
    }

    .article-chapter h2 {
        font-size: 20px;
    }

    .article-chapter h3 {
        font-size: 18px;
    }

    .pain-points {
        grid-template-columns: 1fr;
    }

    .timeline {
        padding-left: 24px;
    }

    .timeline::before {
        left: 8px;
    }

    .timeline-marker {
        left: -24px;
        font-size: 12px;
        padding: 4px 8px;
    }

    .results-comparison {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .cost-section {
        padding: 20px;
    }

    .cost-table {
        font-size: 13px;
    }

    .cost-table th,
    .cost-table td {
        padding: 8px 6px;
    }

    .testimonial {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .articles-grid {
        grid-template-columns: 1fr;
    }

    .article-navigation {
        grid-template-columns: 1fr;
    }

    .next-article {
        justify-content: flex-start;
        text-align: left;
    }

    /* Footer */
    .footer {
        padding: 40px 0 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .section-title {
        font-size: 24px;
        margin-bottom: 32px;
    }

    .section-header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    /* Success Factors Mobile */
    .success-factors li {
        padding-left: 0;
        padding-top: 48px;
    }

    .success-factors li::before {
        top: 0;
    }
}

/* Mobile Small (320px - 480px) */
@media (max-width: 480px) {
    .persona-info h1 {
        font-size: 28px;
    }

    .header-cta {
        display: none;
    }

    .header .container {
        padding: 0 12px;
    }

    .logo img {
        height: 32px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }

    .btn-lg {
        padding: 14px 24px;
        font-size: 16px;
    }

    .roi-summary {
        padding: 16px;
    }

    .roi-highlight {
        font-size: 16px;
    }

    .story-content h3 {
        font-size: 16px;
    }

    .cta-box {
        padding: 20px;
    }

    .cta-services {
        grid-template-columns: 1fr;
    }

    .share-buttons {
        flex-wrap: wrap;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .back-to-top,
    .cta-section,
    .soft-cta,
    .share-buttons,
    .article-navigation,
    .related-articles {
        display: none;
    }

    body {
        background: white;
    }

    .article-body {
        max-width: 100%;
    }
}

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