/**
 * ByteStream Responsive Breakpoints & Viewport Overrides
 * Phase 18: Mobile, Tablet, Laptop, and Desktop Viewport Adaptation
 */

/* ==========================================================================
   LAPTOP & SMALL DESKTOP (Max-width: 1200px)
   ========================================================================== */
@media (max-width: 1200px) {
    .container {
        padding-left: var(--space-5);
        padding-right: var(--space-5);
    }

    .capabilities-grid,
    .testimonials-grid,
    .insights-grid,
    .related-cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }

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

    .footer-top {
        grid-template-columns: 2fr repeat(2, 1fr);
        gap: var(--space-8);
    }
}

/* ==========================================================================
   TABLET VIEWPORT (Max-width: 1024px)
   ========================================================================== */
@media (max-width: 1024px) {
    :root {
        --header-height: 70px;
    }

    .site-header {
        height: var(--header-height);
        z-index: 1200;
    }

    /* Mobile Navigation Drawer Activation */
    .menu-toggle {
        display: flex;
        z-index: 1400;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        transform: translateX(100%);
        width: 100%;
        max-width: 340px;
        height: 100vh;
        height: 100dvh;
        background-color: var(--color-white);
        box-shadow: -10px 0 30px rgba(17, 24, 39, 0.15);
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        padding: calc(var(--header-height) + 16px) var(--space-6) var(--space-8) var(--space-6);
        gap: 0;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s;
        z-index: 1300;
        visibility: hidden;
    }

    .nav-menu.is-open {
        transform: translateX(0);
        visibility: visible;
    }

    .nav-item {
        width: 100%;
        height: auto;
        flex-direction: column;
        align-items: stretch;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-link {
        width: 100%;
        padding: var(--space-4) 0;
        justify-content: space-between;
        font-size: 1rem;
    }

    /* Mobile Mega Menu Accordion */
    .nav-item.has-mega-menu {
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: stretch;
    }

    .mega-menu-wrapper {
        position: static !important;
        transform: none !important;
        width: 100% !important;
        max-width: 100% !important;
        box-shadow: none !important;
        border: none !important;
        border-left: 2px solid var(--color-primary-blue) !important;
        border-radius: 0 !important;
        padding: 0 0 0 var(--space-4) !important;
        margin: 0 !important;
        max-height: 0 !important;
        overflow: hidden !important;
        opacity: 1 !important;
        visibility: visible !important;
        pointer-events: auto !important;
        transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s ease !important;
        background-color: transparent !important;
    }

    .mega-menu-wrapper.is-open {
        max-height: 1500px !important;
        padding-top: var(--space-3) !important;
        padding-bottom: var(--space-4) !important;
    }

    .mega-menu-grid {
        grid-template-columns: 1fr;
        gap: var(--space-5);
    }

    .mega-menu-column h5 {
        margin-bottom: var(--space-2);
    }

    /* Industry Layout Responsive Stacking */
    .industries-layout {
        grid-template-columns: 1fr;
    }

    .industries-nav {
        flex-direction: row;
        overflow-x: auto;
        max-height: none;
        padding-bottom: var(--space-3);
        padding-right: 0;
        gap: var(--space-2);
        -webkit-overflow-scrolling: touch;
    }

    .industry-tab-btn {
        white-space: nowrap;
        flex-shrink: 0;
        padding: var(--space-3) var(--space-4);
    }

    .industry-tab-btn .tab-chevron {
        display: none;
    }

    /* Credibility & Stats Grid */
    .credibility-grid,
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    /* Case Study Card */
    .case-study-card {
        grid-template-columns: 1fr;
    }

    .case-study-visual {
        min-height: 240px;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
    }

    /* Tech Matrix */
    .tech-matrix-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* BEF Timeline */
    .bef-timeline-track {
        left: 24px;
        transform: none;
    }

    .bef-step {
        width: 100%;
        left: 0 !important;
        text-align: left !important;
        padding-left: 64px !important;
        padding-right: 0 !important;
    }

    .bef-step-dot {
        left: 17px !important;
        right: auto !important;
    }
}

/* ==========================================================================
   MOBILE VIEWPORT (Max-width: 768px)
   ========================================================================== */
@media (max-width: 768px) {
    .section-padding {
        padding-top: 56px;
        padding-bottom: 56px;
    }

    .nav-actions .btn-header-cta {
        display: none;
    }

    .capabilities-grid,
    .testimonials-grid,
    .insights-grid,
    .related-cards-grid,
    .tech-matrix-grid,
    .bytestream-way-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .credibility-grid,
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

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

    .industry-outcomes-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

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

    .footer-legal-links {
        flex-wrap: wrap;
        gap: var(--space-4);
    }

    .tech-strip-grid {
        justify-content: center;
        gap: var(--space-4) var(--space-6);
    }

    .tech-strip-item {
        font-size: 0.8125rem;
        gap: 6px;
    }

    .tech-strip-item svg {
        width: 18px !important;
        height: 18px !important;
        min-width: 18px !important;
        min-height: 18px !important;
    }

    .credibility-icon {
        width: 36px;
        height: 36px;
        margin-bottom: var(--space-3);
    }

    .credibility-icon svg {
        width: 18px !important;
        height: 18px !important;
        min-width: 18px !important;
        min-height: 18px !important;
    }

    .capability-icon-wrap {
        width: 42px;
        height: 42px;
        margin-bottom: var(--space-4);
    }

    .capability-icon-wrap svg {
        width: 20px !important;
        height: 20px !important;
        min-width: 20px !important;
        min-height: 20px !important;
    }

    .eyebrow svg,
    .hero-eyebrow svg {
        width: 13px !important;
        height: 13px !important;
        min-width: 13px !important;
        min-height: 13px !important;
    }
}

/* ==========================================================================
   SMALL MOBILE VIEWPORT (Max-width: 430px, 390px, 360px)
   ========================================================================== */
@media (max-width: 430px) {
    .container {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }

    .industry-content-container,
    .case-study-details,
    .stat-card,
    .capability-card,
    .testimonial-card,
    .insight-body {
        padding: var(--space-5);
    }

    .cta-actions {
        flex-direction: column;
        width: 100%;
    }

    .cta-actions .btn {
        width: 100%;
    }

    .btn-lg {
        padding: 14px 20px;
        font-size: 0.9375rem;
    }

    .tech-strip-item {
        font-size: 0.75rem;
    }

    .tech-strip-item svg {
        width: 16px !important;
        height: 16px !important;
        min-width: 16px !important;
        min-height: 16px !important;
    }

    .credibility-icon {
        width: 32px;
        height: 32px;
    }

    .credibility-icon svg {
        width: 16px !important;
        height: 16px !important;
    }

    .capability-icon-wrap {
        width: 36px;
        height: 36px;
    }

    .capability-icon-wrap svg {
        width: 18px !important;
        height: 18px !important;
    }
}