/**
 * Responsive Stylesheet: Mobile-First Comprehensive Overrides
 * Breakpoints: 1200px, 1024px, 768px, 480px, 375px
 * Guaranteed Touch Target >= 44px on all interactive elements
 */

/* -------------------------------------------------------------
   1. LAPTOP & COMPACT DESKTOP (<= 1200px)
------------------------------------------------------------- */
@media (max-width: 1200px) {
    .container {
        width: calc(100% - 48px);
    }

    .catalog-content-container {
        width: 100%;
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 0;
    }

    .header-container {
        gap: 16px;
    }

    .artwork-detail-layout {
        max-width: var(--container-max);
        margin: 0 auto;
        padding-left: 0px;
        padding-right: 0px;
    }

    .nav-menu {
        gap: 18px;
    }

    .nav-menu a {
        font-size: 0.8125rem;
    }

    .btn-header-consult {
        padding: 0 14px;
        font-size: 0.75rem;
    }

    .artworks-responsive-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .slider-viewport {
        grid-auto-columns: calc((100% - (2 * 20px)) / 3);
    }
}

/* -------------------------------------------------------------
   2. TABLET LANDSCAPE (<= 1024px)
------------------------------------------------------------- */
@media (max-width: 1024px) {
    .container {
        width: calc(100% - 40px);
    }

    .site-header,
    .site-header.is-scrolled {
        height: 84px;
    }

    .site-branding .custom-logo,
    .site-header.is-scrolled .site-branding .custom-logo {
        width: 120px;
        max-width: 120px;
        height: auto;
        max-height: 64px;
    }

    .subpage-header-offset {
        padding-top: 114px;
    }

    .stone-breadcrumb-bar {
        padding: 12px 0;
        margin-bottom: 20px;
    }

    .mobile-toggle {
        display: flex;
    }

    .btn-header-consult {
        display: none;
    }

    .main-navigation {
        position: fixed;
        top: 0;
        right: -100%;
        width: 82%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-bg-base);
        border-left: 1px solid var(--border-gold-tint);
        padding: 80px 28px 40px;
        z-index: 1001;
        transition: right 0.35s ease;
        overflow-y: auto;
    }

    .main-navigation.is-open {
        right: 0;
    }

    .nav-menu {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu a {
        display: block;
        padding: 14px 0;
        font-size: 0.9375rem;
        min-height: 48px;
    }

    .nav-menu .current-menu-item>a::after {
        display: none;
    }

    .mobile-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.8);
        opacity: 0;
        visibility: hidden;
        transition: all 0.25s ease;
    }

    .mobile-backdrop.is-visible {
        opacity: 1;
        visibility: visible;
    }

    /* Hero Stack */
    .hero-section {
        padding-top: 100px;
        padding-bottom: 60px;
        min-height: auto;
    }

    .hero-section {
        min-height: 70vh;
        padding-top: 110px;
        padding-bottom: 70px;
    }

    .hero-vignette-overlay {
        background: linear-gradient(180deg, rgba(12, 12, 12, 0.92) 0%, rgba(12, 12, 12, 0.82) 60%, rgba(12, 12, 12, 0.95) 100%);
    }

    .hero-container {
        justify-content: center;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    /* USP 2x2 */
    .advantages-bar-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .adv-col-item:nth-child(2)::after {
        display: none;
    }

    /* Collections 1 Col */
    .collections-cards-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .collection-exhibit-card {
        aspect-ratio: auto;
        min-height: 220px;
    }

    /* Featured slider 2 cols */
    .slider-viewport {
        grid-auto-columns: calc((100% - 20px) / 2);
    }

    .slider-btn {
        display: none;
        /* Touch swipe on tablet/mobile */
    }

    /* Catalog: Hide sidebar on tablet, show full-width grid & show mobile filter tools */
    .catalog-sidebar {
        display: none;
    }

    .catalog-layout-grid {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .catalog-utility-bar {
        justify-content: space-between;
    }

    .utility-left-tools {
        display: flex;
        align-items: center;
        gap: 16px;
    }

    .btn-trigger-filter {
        display: inline-flex;
    }

    .catalog-artworks-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    /* Process 1 Col */
    .process-quote-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    /* Subpage Hero Tablet */
    .subpage-hero-left {
        max-width: 100%;
    }

    /* Golden Lotus Divider Motif centered on tablet & mobile */
    .subpage-hero-motif,
    .hero-content .subpage-hero-motif,
    .subpage-hero-content .subpage-hero-motif,
    .home .hero-section .subpage-hero-motif {
        display: flex !important;
        justify-content: center !important;
        margin-left: auto !important;
        margin-right: auto !important;
        transform-origin: center center !important;
    }

    .process-quote-side {
        padding-left: 0;
        border-left: none;
        border-top: 1px solid var(--border-gold-tint);
        padding-top: 32px;
        text-align: center;
    }

    .artisan-signature-group {
        align-items: center;
    }

    .footer-bar-container {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 22px;
    }

    .footer-mid-contacts {
        flex-wrap: wrap;
        justify-content: center;
        align-items: flex-start;
        gap: 16px;
    }
}

/* -------------------------------------------------------------
   3. TABLET PORTRAIT & MOBILE (<= 768px)
------------------------------------------------------------- */
@media (max-width: 768px) {
    .section {
        padding-top: 30px;
        padding-bottom: 30px;
    }

    .hero-section {
        height: 100vh;
        height: 100dvh;
        min-height: 520px;
        padding-top: 100px;
        padding-bottom: 40px;
    }

    .hero-scroll-indicator {
        bottom: 12px;
    }

    .scroll-indicator-text {
        font-size: 0.58rem;
        letter-spacing: 0.12em;
    }

    .hero-vignette-overlay {
        background: linear-gradient(180deg,
                rgba(12, 12, 12, 0.4) 0%,
                rgba(12, 12, 12, 0.75) 55%,
                var(--color-bg-base) 100%);
    }

    .site-header,
    .site-header.is-scrolled {
        height: 76px;
    }

    .site-branding .custom-logo,
    .site-header.is-scrolled .site-branding .custom-logo {
        width: 105px;
        max-width: 105px;
        height: auto;
        max-height: 56px;
    }

    .subpage-header-offset {
        padding-top: 100px;
    }

    .breadcrumb-item {
        font-size: 0.75rem;
    }

    .hero-title-main {
        font-size: 2.35rem;
    }

    .hero-title-sub {
        font-size: 24px;
    }

    .hero-title-sub-2 {
        font-size: 1.1rem;
    }

    .steps-four-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .slider-viewport {
        grid-auto-columns: 82%;
    }

    .artworks-responsive-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
    }

    .specs-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    /* Single Artwork Detail Page 1 Col */
    .artwork-detail-layout {
        padding-left: 0;
        padding-right: 0;
        width: 100%;
        box-sizing: border-box;
    }

    .artwork-detail-top-grid {
        grid-template-columns: 1fr;
        gap: 28px;
        margin-bottom: 36px;
        width: 100%;
        min-width: 0;
    }

    .artwork-gallery-col {
        min-width: 0;
        max-width: 100%;
        width: 100%;
        overflow: hidden;
    }

    .artwork-summary-col {
        min-width: 0;
        max-width: 100%;
        width: 100%;
    }

    .artwork-main-frame {
        aspect-ratio: 1 / 1;
        width: 100%;
        max-width: 100%;
    }

    .artwork-consult-actions {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .artwork-detail-body-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        margin-bottom: 40px;
    }
}

/* -------------------------------------------------------------
   4. SMARTPHONES (<= 480px & 375px)
------------------------------------------------------------- */
@media (max-width: 480px) {
    .container {
        width: calc(100% - 32px);
    }

    .subpage-hero-motif,
    .hero-content .subpage-hero-motif,
    .subpage-hero-content .subpage-hero-motif,
    .home .hero-section .subpage-hero-motif {
        display: flex !important;
        align-items: center !important;
        gap: 16px !important;
        margin: 20px auto 24px !important;
        justify-content: center !important;
        transform-origin: center center !important;
    }

    .site-header,
    .site-header.is-scrolled {
        height: 70px;
    }

    .site-branding .custom-logo,
    .site-header.is-scrolled .site-branding .custom-logo {
        width: 90px;
        max-width: 90px;
        height: auto;
        max-height: 48px;
    }

    .subpage-header-offset {
        padding-top: 92px;
    }

    .stone-breadcrumb-bar {
        padding: 10px 0;
        margin-bottom: 16px;
    }

    .hero-title-main {
        font-size: 42px;
    }

    .hero-title-sub {
        font-size: 24px;
    }

    .hero-title-sub-2 {
        font-size: 18px;
    }

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

    .hero-actions .btn-pill-primary,
    .hero-actions .btn-pill-secondary {
        width: 100%;
    }

    .advantages-bar-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .adv-col-item::after {
        display: none !important;
    }

    .slider-viewport {
        grid-auto-columns: 88%;
    }

    .artworks-responsive-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .steps-four-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-mid-contacts {
        flex-direction: column;
        gap: 12px;
    }

    .btn-cta-high-contrast {
        width: 100%;
    }

    /* Single Artwork Detail & Archive Filter Mobile */
    .catalog-layout-grid {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .catalog-sidebar {
        display: none;
    }

    .catalog-artworks-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .artwork-grid-card {
        padding: 8px;
    }

    .artwork-card-body {
        padding-top: 10px;
    }

    .artwork-card-title {
        font-size: 0.925rem;
        margin-bottom: 4px;
        line-height: 1.3;
        word-break: break-word;
    }

    .artwork-card-price {
        font-size: 0.95rem;
        margin-bottom: 8px;
    }

    .artwork-card-meta-list {
        gap: 5px;
        margin-bottom: 10px;
        padding-bottom: 8px;
    }

    .meta-row {
        font-size: 0.72rem;
        line-height: 1.35;
        gap: 5px;
    }

    .meta-row .meta-icon svg {
        width: 12px;
        height: 12px;
    }

    .btn-card-detail {
        min-height: 34px;
        font-size: 0.75rem;
        border-radius: 17px;
    }

    .artwork-detail-top-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-bottom: 28px;
        width: 100%;
        min-width: 0;
    }

    .artwork-main-frame {
        aspect-ratio: 1 / 1;
        width: 100%;
        max-width: 100%;
        margin-bottom: 12px;
        border-radius: var(--radius-sm);
    }

    .artwork-frame-arrow {
        width: 38px;
        height: 38px;
    }

    .artwork-frame-prev {
        left: 8px;
    }

    .artwork-frame-next {
        right: 8px;
    }

    .artwork-thumbs-swiper {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        overflow: hidden;
    }

    .artwork-thumbs-swiper .gallery-thumb-item {
        width: 60px;
        height: 60px;
    }

    .artwork-single-title {
        font-size: 1.45rem;
        line-height: 1.3;
        margin-bottom: 10px;
        word-break: break-word;
    }

    .artwork-detail-body-grid {
        grid-template-columns: 1fr;
        gap: 28px;
        margin-bottom: 40px;
    }

    .related-slider-container {
        padding: 0;
    }

    .related-nav-prev {
        left: -6px;
    }

    .related-nav-next {
        right: -6px;
    }

    .artwork-consult-actions {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    /* Subpage Hero Mobile */
    .subpage-hero-banner {
        min-height: auto;
        padding: 105px 0 36px;
    }

    .subpage-hero-gradient-overlay {
        background: linear-gradient(to bottom,
                rgba(10, 8, 7, 0.94) 0%,
                rgba(10, 8, 7, 0.88) 55%,
                rgba(10, 8, 7, 0.96) 100%);
    }

    .subpage-hero-title {
        margin-bottom: 14px;
    }

    .subpage-hero-title .subpage-hero-title-main,
    .subpage-hero-title .hero-title-main {
        font-size: 1.95rem;
        line-height: 1.2;
    }

    .subpage-hero-title .subpage-hero-title-sub,
    .subpage-hero-title .hero-title-sub {
        font-size: 1.125rem;
        line-height: 1.35;
        margin-top: 5px;
    }


    .subpage-hero-desc {
        font-size: 14px;
        line-height: 1.6;
        margin-bottom: 16px;
    }

    .subpage-hero-quote {
        font-size: 34px;
        line-height: 1;
    }
}

/* -------------------------------------------------------------
   6. CUSTOM ORDER COMMISSION PAGE RESPONSIVE
   ------------------------------------------------------------- */
@media (max-width: 1024px) {
    .order-steps-flow {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .step-flow-arrow {
        display: none;
    }

    .order-showcase-layout {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }

    .showcase-left,
    .showcase-right {
        text-align: center;
        padding: 0;
        align-items: center;
    }

    .showcase-motif {
        justify-content: center;
    }

    .showcase-motif .motif-line {
        background: linear-gradient(90deg, transparent, var(--color-champagne), transparent);
    }

    .showcase-signature-box {
        align-items: center;
    }
}

@media (max-width: 768px) {
    .order-process-section {
        padding: 60px 0;
    }

    .order-steps-flow {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .order-step-card {
        padding: 22px 18px 24px;
    }

    .step-card-title {
        min-height: auto;
        font-size: 1rem;
    }

    .order-showcase-section {
        padding: 70px 0;
    }

    .showcase-quote-left {
        font-size: 1.45rem;
    }

    .showcase-quote-right {
        font-size: 1.25rem;
    }

    .btn-order-cta {
        width: 100%;
        max-width: 340px;
        min-height: 48px;
        padding: 16px 24px;
    }

    .order-pillars-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px 0;
    }

    .order-pillar-col:nth-child(2) {
        border-right: none;
    }

    .order-pillar-col {
        padding: 16px 12px;
    }
}

@media (max-width: 480px) {
    .order-pillars-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .order-pillar-col {
        border-right: none;
        border-bottom: 1px solid rgba(212, 175, 119, 0.12);
        padding-bottom: 20px;
    }

    .order-pillar-col:last-child {
        border-bottom: none;
    }

    .signature-handwritten {
        font-size: 2.6rem;
    }

    .catalog-artworks-grid {
        gap: 8px;
    }

    .artwork-grid-card {
        padding: 6px;
    }

    .artwork-card-title {
        font-size: 0.85rem;
    }

    .artwork-card-price {
        font-size: 0.875rem;
    }
}

/* -------------------------------------------------------------
   7. GEMSTONE MATERIALS PAGE RESPONSIVE
   ------------------------------------------------------------- */
@media (max-width: 1024px) {
    .gemstones-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .gemstones-cta-layout {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .gem-cta-left {
        align-items: center;
        text-align: center;
    }

    .gem-cta-right {
        align-items: center;
        text-align: center;
    }

    .gem-signature-box {
        align-items: center;
    }
}

@media (max-width: 768px) {
    .gemstones-section {
        padding: 60px 0;
    }

    .gemstones-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .gemstone-card {
        padding: 22px 18px 24px;
    }

    .gemstones-pillars-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px 0;
    }

    .gem-pillar-col:nth-child(2) {
        border-right: none;
    }

    .gem-pillar-col {
        padding: 16px 12px;
    }

    .gemstones-cta-section {
        padding: 65px 0;
    }

    .gem-cta-title {
        font-size: 1.45rem;
    }

    .gem-cta-desc {
        font-size: 1rem;
    }

    .btn-gem-cta {
        width: 100%;
        max-width: 340px;
    }
}

@media (max-width: 480px) {
    .gemstones-pillars-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .gem-pillar-col {
        border-right: none;
        border-bottom: 1px solid rgba(212, 175, 119, 0.12);
        padding-bottom: 20px;
    }

    .gem-pillar-col:last-child {
        border-bottom: none;
    }

    .gemstone-meta-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .gem-signature-handwritten {
        font-size: 2rem;
    }
}

/* =============================================================================
   STORY EDITORIAL NARRATIVE PAGE RESPONSIVE
   ============================================================================= */

@media (max-width: 1024px) {
    .story-chapter-nav {
        display: none;
    }

    .story-section {
        padding: 70px 0;
    }

    .story-grid-monumental {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .story-grid-duo-gallery {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .story-metamorphosis-layout {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .story-metamorphosis-layout .metamorphosis-content {
        order: 1;
    }

    .story-metamorphosis-layout .metamorphosis-media {
        order: 2;
    }

    .story-metamorphosis-layout .metamorphosis-media-right {
        order: 3;
    }

    .story-journey-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .story-values-grid {
        gap: 20px;
    }

    .exploded-cards-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .story-section {
        padding: 55px 0;
    }

    .story-container {
        padding: 0 16px;
    }

    .story-header-center {
        margin-bottom: 40px;
    }

    .story-badge-header {
        gap: 14px;
        margin-bottom: 18px;
    }

    .story-giant-num {
        font-size: 3rem;
    }

    .story-heading-editorial {
        font-size: 1.5rem;
    }

    .story-rich-narrative {
        font-size: 14px;
        line-height: 1.8;
    }

    .story-signature-quote-callout {
        padding: 20px 18px;
        margin-top: 24px;
    }

    .story-poetic-quote {
        font-size: 34px;
        line-height: 1;
    }

    .story-quote-floating-card {
        padding: 24px 20px;
        margin-bottom: 24px;
    }

    .story-lotus-sanctuary {
        padding: 80px 0;
    }

    .story-lotus-title {
        font-size: 1.75rem;
    }

    .story-lotus-desc {
        font-size: 14.5px;
        margin-bottom: 30px;
    }

    .lotus-zen-quote-wrap {
        padding: 18px 20px;
        border-radius: 20px;
    }

    .journey-stack-card {
        padding: 24px 20px;
    }

    .story-values-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        margin: 40px 0 50px;
    }

    .story-pillar-card {
        padding: 32px 20px 28px;
    }

    .epilogue-monumental-quote {
        font-size: 1.5rem;
        margin-bottom: 32px;
    }

    .epilogue-signature-cluster {
        gap: 20px;
        flex-direction: column;
        margin-bottom: 36px;
    }

    .artisan-signature-group {
        text-align: center;
    }

    .artisan-calligraphy {
        font-size: 2.5rem;
    }

    .story-footer-cta {
        flex-direction: column;
        width: 100%;
        gap: 14px;
    }

    .story-footer-cta .btn-pill-primary,
    .story-footer-cta .btn-pill-secondary {
        width: 100%;
        text-align: center;
        justify-content: center;
    }

    /* Exploded View Mobile 768px */
    .section-exploded-view {
        padding: 60px 0 75px;
    }

    .exploded-title {
        font-size: 1.5rem;
    }

    .exploded-stage-viewport {
        height: 480px;
        margin: 25px auto 45px;
    }

    .exploded-3d-hud {
        top: 14px;
        left: 14px;
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .exploded-stage-canvas {
        max-width: 95%;
    }

    .exploded-cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .ev-callout-item {
        transform: scale(0.85);
    }
}

@media (max-width: 480px) {
    .story-section {
        padding: 45px 0;
    }

    .story-giant-num {
        font-size: 2.5rem;
    }

    .story-heading-editorial {
        font-size: 1.3rem;
    }


    .story-rich-narrative {
        font-size: 13.5px;
    }

    .imperial-seal-stamp {
        width: 64px;
        height: 64px;
    }

    .exploded-stage-viewport {
        height: 420px;
    }

    .hud-tip {
        display: none;
    }

    .exploded-title {
        font-size: 1.3rem;
    }

    .ev-callout-label .label-title {
        font-size: 10px;
    }

    .ev-callout-label .label-sub {
        display: none;
    }

    .seal-inner-frame {
        font-size: 10px;
        padding: 4px 6px;
    }
}

/* ==========================================================================
   RESPONSIVE: LIÊN HỆ (CONTACT ATELIER & SHOWROOM PAGE)
   Mobile-first adaptations, touch targets ≥ 44px
   ========================================================================== */

@media (max-width: 1024px) {
    .contact-hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-hero-left {
        padding-right: 0;
        text-align: center;
        align-items: center;
    }

    .contact-hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .contact-hero-quote {
        margin-left: auto;
        margin-right: auto;
        text-align: center;
        border-left: none;
        padding-left: 0;
        border-top: 1px solid rgba(212, 168, 83, 0.35);
        border-bottom: 1px solid rgba(212, 168, 83, 0.35);
        padding: 12px 0;
    }

    .contact-channels-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .contact-location-grid {
        grid-template-columns: 1fr;
    }

    .contact-address-col {
        border-right: none;
        border-bottom: 1px solid rgba(212, 168, 83, 0.15);
        padding: 36px 28px;
        text-align: center;
        align-items: center;
    }

    .contact-address-header {
        justify-content: center;
    }

    .contact-welcome-note {
        margin-left: auto;
        margin-right: auto;
    }

    .contact-values-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-gratitude-wrap {
        border-left: none;
        border-top: 1px solid rgba(212, 168, 83, 0.15);
        padding-left: 0;
        padding-top: 36px;
        align-items: center;
        text-align: center;
    }

    .contact-signature-block {
        align-items: center;
    }
}

@media (max-width: 640px) {
    .contact-hero-section {
        padding: 24px 0 45px;
    }

    .contact-hero-title {
        font-size: 1.95rem;
        margin-bottom: 18px;
    }

    .contact-hero-subtitle {
        font-size: 0.95rem;
        margin-bottom: 20px;
    }

    .contact-visual-slogan {
        font-size: 0.82rem;
        bottom: 14px;
        right: 14px;
        padding-right: 8px;
    }

    .contact-channels-section {
        padding: 45px 0 55px;
    }

    .contact-section-header {
        margin-bottom: 32px;
    }

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

    .contact-channel-card {
        padding: 26px 18px 24px;
        min-height: 44px;
    }

    .channel-icon-circle {
        width: 52px;
        height: 52px;
        margin-bottom: 14px;
    }

    .channel-card-value {
        font-size: 1.25rem;
    }

    .contact-location-section {
        padding-bottom: 55px;
    }

    .contact-address-col {
        padding: 30px 20px;
    }

    .contact-street {
        font-size: 1.35rem;
    }

    .contact-map-col {
        min-height: 300px;
    }

    .contact-map-preview-wrap {
        min-height: 300px;
    }

    .contact-values-section {
        padding: 35px 0 55px;
    }

    .contact-pillars-wrap {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .contact-pillar-item {
        background: rgba(22, 18, 15, 0.45);
        border: 1px solid rgba(212, 168, 83, 0.12);
        border-radius: 6px;
        padding: 18px 14px;
    }

    .contact-gratitude-quote {
        font-size: 1.15rem;
    }

    .contact-signature-handwritten {
        font-size: 2.2rem;
    }

    .contact-bottom-panorama {
        padding: 60px 0 65px;
    }

    .panorama-content {
        justify-content: center;
        text-align: center;
        flex-direction: column;
        gap: 14px;
    }

    .panorama-calligraphy {
        font-size: 2rem;
        line-height: 1.3;
    }
}

/* ==========================================================================
   RESPONSIVE: CHI TIẾT CHẤT LIỆU ĐÁ (TAXONOMY: CHAT_LIEU_DA)
   ========================================================================== */

@media (max-width: 1024px) {
    .stone-spotlight-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .stone-sidebar-sticky {
        position: static;
    }

    .stone-artworks-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .stone-cta-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .stone-cta-right {
        border-left: none;
        border-top: 1px solid rgba(212, 168, 83, 0.18);
        padding-left: 0;
        padding-top: 32px;
        align-items: center;
        text-align: center;
    }

    .stone-signature-box {
        align-items: center;
    }
}

@media (max-width: 640px) {
    .stone-spotlight-section {
        padding: 45px 0 60px;
    }

    .stone-display-name {
        font-size: 1.65rem;
        line-height: 1.25;
    }

    .stone-display-tagline {
        font-size: 0.95rem;
        line-height: 1.55;
    }

    .stone-narrative-desc {
        font-size: 0.875rem;
        line-height: 1.7;
    }

    .stone-attributes-matrix {
        grid-template-columns: 1fr;
        gap: 14px;
        padding: 16px;
    }

    .stone-artworks-section {
        padding: 55px 0 65px;
    }

    .stone-artworks-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .stone-action-group {
        flex-direction: column;
    }

    .btn-stone-explore,
    .btn-stone-custom {
        width: 100%;
        justify-content: center;
        min-height: 46px;
    }

    .stone-cta-banner {
        padding: 60px 0;
    }

    .stone-cta-title {
        font-size: 1.4rem;
        line-height: 1.35;
    }

    .stone-cta-desc {
        font-size: 0.875rem;
        line-height: 1.65;
    }

    .stone-cta-actions {
        flex-direction: column;
    }

    .btn-stone-cta-main,
    .btn-stone-cta-sub {
        width: 100%;
        justify-content: center;
        min-height: 46px;
    }

    .stone-cta-quote {
        font-size: 1.25rem;
    }

    .stone-signature-script {
        font-size: 2rem;
    }
}

/* ==========================================================================
   RESPONSIVE: SEARCH MODAL, SEARCH PAGE & 404
   ========================================================================== */
@media (max-width: 991px) {
    .search-results-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .search-artworks-live-list {
        grid-template-columns: 1fr;
    }

    .search-modal {
        padding: 10px;
    }

    .search-modal-dialog {
        max-height: 94vh;
        border-radius: 12px;
    }

    .search-modal-header {
        padding: 14px 16px;
    }

    .search-form-wrapper {
        padding: 14px 16px 10px;
    }

    .search-quick-tags {
        padding: 0 16px 12px;
    }

    .search-results-viewport {
        padding: 14px 16px;
    }

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

    .search-hero-banner {
        padding: 100px 0 40px;
    }

    .error-404-page {
        padding: 100px 0 60px;
    }

    .error-404-actions {
        flex-direction: column;
        width: 100%;
        max-width: 320px;
        margin-left: auto;
        margin-right: auto;
    }

    .btn-404-primary,
    .btn-404-secondary {
        width: 100%;
        justify-content: center;
        text-align: center;
    }

    .error-search-inner {
        flex-direction: column;
        padding: 10px 14px;
        gap: 8px;
    }

    .error-search-input {
        width: 100%;
        height: 42px;
    }

    .error-search-submit-btn {
        width: 100%;
        justify-content: center;
        padding: 10px;
    }
}

/* -------------------------------------------------------------
   RESPONSIVE: EDITORIAL STONE BOOK SLIDER
   ------------------------------------------------------------- */
@media (max-width: 991px) {
    .stone-book-section {
        padding: 60px 0;
    }

    .stone-book-slider-wrapper {
        position: relative;
        padding: 0 46px;
    }

    .stone-book-nav {
        display: flex !important;
        width: 42px;
        height: 42px;
        background: rgba(14, 61, 47, 0.88);
        border: 1px solid rgba(212, 175, 119, 0.5);
        color: #f5efe6;
        border-radius: 50%;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.45);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        z-index: 12;
    }

    .stone-book-nav svg {
        width: 20px;
        height: 20px;
    }

    .stone-book-prev {
        left: 0;
    }

    .stone-book-next {
        right: 0;
    }

    .stone-book-section.is-embedded .stone-book-slider-wrapper {
        padding: 0 42px;
    }

    .stone-book-section.is-embedded .stone-book-prev {
        left: -4px;
    }

    .stone-book-section.is-embedded .stone-book-next {
        right: -4px;
    }

    .stone-book-slider-wrapper .stone-book-pagination,
    .stone-book-pagination {
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
        margin: 16px auto 0 !important;
        width: 100% !important;
    }

    .stone-book-card {
        padding: 26px 24px 22px;
    }

    .book-card-media {
        height: 220px;
        margin-bottom: 20px;
    }

    .stone-book-card.is-gallery-card .book-card-media {
        height: 280px;
        margin-bottom: 14px;
    }

    .book-card-body {
        font-size: 15.5px;
        line-height: 1.72;
    }
}

@media (max-width: 576px) {
    .stone-book-section {
        padding: 46px 0;
    }

    .stone-book-header {
        margin-bottom: 24px;
    }

    .stone-section-divider {
        margin: 36px auto 32px;
    }

    .stone-book-slider-wrapper {
        padding: 0 36px;
    }

    .stone-book-nav {
        width: 36px;
        height: 36px;
    }

    .stone-book-nav svg {
        width: 17px;
        height: 17px;
    }

    .stone-book-prev {
        left: -4px;
    }

    .stone-book-next {
        right: -4px;
    }

    .stone-book-card {
        padding: 20px 18px 18px;
        border-radius: 10px;
    }

    .book-card-media {
        height: 185px;
        margin-bottom: 16px;
    }

    .stone-book-card.is-gallery-card .book-card-media {
        height: 240px;
        margin-bottom: 12px;
    }

    .book-card-body {
        font-size: 14.5px;
        line-height: 1.68;
    }

    .book-card-body p {
        margin-bottom: 10px;
    }

    .book-card-dash {
        font-size: 18px;
    }

    .book-page-number {
        width: 26px;
        height: 26px;
        font-size: 12.5px;
    }

    .stone-book-gallery-card {
        border-radius: 8px;
    }

    .stone-gallery-lightbox-trigger {
        aspect-ratio: 6 / 9;
        border-radius: 8px;
    }

    .stone-gallery-full-img {
        border-radius: 8px;
    }
}