/* =====================================================
   STONE FACTORY - ARCHITECTURAL MINIMALIST DESIGN
   ===================================================== */

/* === GLOBAL STYLES === */
:root {
    --white: #ffffff;
    --black: #000000;
    --text-dark: #2a2a2a;
    --text-light: #595959;
    --border-color: #e0ddd8;
    --accent-color: #1c2b3a;
    --accent-gold: #b8965a;
    --bg-light: #f5f4f1;
    --success-green: #25D366;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    color: var(--text-dark);
    background-color: var(--white);
    line-height: 1.6;
    font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--accent-color);
    letter-spacing: -0.02em;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.25rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

a {
    color: var(--text-dark);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-color);
}

/* === NAVIGATION === */
.navbar {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.navbar-nav .nav-link {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 1rem;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    border-radius: 0;
}

.navbar-nav .nav-link:hover {
    color: var(--accent-color);
    background-color: transparent;
}

.navbar-nav .nav-link.active {
    color: var(--accent-gold);
    border-bottom: 2px solid var(--accent-gold);
}

/* === BUTTONS === */
.btn {
    border-radius: 0;
    padding: 0.75rem 2rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--white);
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.btn-success {
    background-color: var(--success-green);
    border-color: var(--success-green);
    color: var(--white);
}

.btn-success:hover {
    background-color: #20ba5a;
    border-color: #20ba5a;
}

.btn-outline-primary {
    background-color: transparent;
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.btn-outline-primary:hover {
    background-color: var(--accent-color);
    color: var(--white);
}

/* === HERO SECTION === */
.hero-section {
    position: relative;
    height: 70vh;
    min-height: 500px;
    overflow: hidden;
    background-color: var(--text-dark);
}

.hero-section .carousel-item {
    height: 70vh;
    min-height: 500px;
}

.hero-section .carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.7;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    z-index: 1;
    pointer-events: none;
}

.hero-overlay .hero-content {
    pointer-events: auto;
}

.hero-content {
    max-width: 800px;
    padding: 2rem;
    position: relative;
    width: 100%;
}

.hero-content h1 {
    font-size: 3.5rem;
    color: var(--white);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--white);
    margin-bottom: 2rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.hero-content .btn {
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--white);
    padding: 0.75rem 2rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
}

.hero-content .btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.hero-content-item {
    display: none;
    opacity: 0;
    transition: opacity 0.6s ease-in-out;
}

.hero-content-item.active {
    display: block;
    opacity: 1;
}

.hero-section .carousel-item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.7;
}

/* Carousel Control Buttons */
.hero-section .carousel-control-prev,
.hero-section .carousel-control-next {
    z-index: 10;
    width: 5%;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.hero-section .carousel-control-prev:hover,
.hero-section .carousel-control-next:hover {
    opacity: 1;
}

.hero-section .carousel-control-prev-icon,
.hero-section .carousel-control-next-icon {
    width: 3rem;
    height: 3rem;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    backdrop-filter: blur(5px);
    transition: all 0.3s ease;
}

.hero-section .carousel-control-prev:hover .carousel-control-prev-icon,
.hero-section .carousel-control-next:hover .carousel-control-next-icon {
    background-color: rgba(255, 255, 255, 0.5);
    transform: scale(1.1);
}

.hero-section .carousel-control-prev {
    left: 20px;
}

.hero-section .carousel-control-next {
    right: 20px;
}

/* Carousel Indicators */
.hero-section .carousel-indicators {
    z-index: 10;
    margin-bottom: 2rem;
}

.hero-section .carousel-indicators button {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    border: 2px solid rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
}

.hero-section .carousel-indicators button.active {
    background-color: rgba(255, 255, 255, 1);
    transform: scale(1.2);
}

/* === SECTION STYLES === */
.section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 2px;
    background-color: var(--accent-gold);
    margin: 1.25rem auto 0;
}

/* === PRODUCT GRID === */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

@media (max-width: 992px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
}

/* === PRODUCT CARD === */
.product-card {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
}

.product-card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    transform: translateY(-5px);
}

.product-card-image {
    width: 100%;
    height: 300px;
    overflow: hidden;
    position: relative;
    background-color: #f5f5f5;
}

.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-card-image img {
    transform: scale(1.1);
}

.product-card-body {
    padding: 1.5rem;
}

.product-card-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-light);
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.product-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 0.75rem;
}

.product-card-specs {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.product-card-spec {
    font-size: 0.875rem;
    color: var(--text-light);
}

.product-card-spec strong {
    color: var(--text-dark);
    display: block;
}

/* === HOVER ZOOM EFFECT === */
.hover-zoom {
    overflow: hidden;
    cursor: pointer;
}

.hover-zoom img {
    transition: transform 0.5s ease;
}

.hover-zoom:hover img {
    transform: scale(1.15);
}

/* === PRODUCT DETAIL PAGE === */
.product-detail-container {
    padding: 3rem 0;
}

.product-image-gallery {
    position: sticky;
    top: 100px;
}

.main-image-container {
    position: relative;
    width: 100%;
    height: 600px;
    background-color: #f5f5f5;
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin-bottom: 1rem;
}

.main-image-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    cursor: zoom-in;
}

.image-zoom-hint {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.main-image-container:hover .image-zoom-hint {
    opacity: 1;
}

.thumbnail-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
}

.thumbnail-item {
    position: relative;
    height: 120px;
    border: 2px solid var(--border-color);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
}

.thumbnail-item:hover,
.thumbnail-item.active {
    border-color: var(--accent-gold);
    transform: scale(1.02);
}

.thumbnail-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.thumbnail-item:hover img {
    transform: scale(1.1);
}

.thumbnail-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    padding: 0.25rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.thumbnail-item:hover .thumbnail-overlay {
    opacity: 1;
}

.image-type-badge {
    font-size: 0.65rem;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* === PRODUCT INFO === */
.product-info {
    padding-left: 2rem;
}

.product-info h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.product-category-badge {
    display: inline-block;
    background-color: var(--accent-gold);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
}

.product-description {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 2rem;
}

/* === SPECIFICATIONS TABLE === */
.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.specs-table th,
.specs-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.specs-table th {
    background-color: #f5f5f5;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    width: 35%;
}

.specs-table td {
    color: var(--text-dark);
    font-weight: 500;
}

.specs-table tr:last-child th,
.specs-table tr:last-child td {
    border-bottom: none;
}

/* === CTA BUTTONS === */
.product-cta {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.product-cta .btn {
    flex: 1;
    padding: 1rem;
    font-size: 1rem;
}

/* === INQUIRY FORM === */
.inquiry-form {
    background-color: #f9f9f9;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.inquiry-form .form-label {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

.inquiry-form .form-control,
.inquiry-form .form-select {
    border-radius: 0;
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.inquiry-form .form-control:focus,
.inquiry-form .form-select:focus {
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 0.2rem rgba(184, 150, 90, 0.15);
}

.inquiry-form textarea.form-control {
    min-height: 150px;
}

.inquiry-form .btn {
    width: 100%;
    margin-top: 1rem;
}

/* === FILTER SIDEBAR === */
.filter-sidebar {
    background-color: #f9f9f9;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.filter-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.filter-group {
    margin-bottom: 2rem;
}

.filter-group-title {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.filter-option {
    display: block;
    padding: 0.5rem 0;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.filter-option:hover {
    color: var(--accent-color);
    padding-left: 0.5rem;
}

.filter-option.active {
    color: var(--accent-color);
    font-weight: 600;
}

/* === WECHAT MODAL === */
.modal-content {
    border-radius: 0;
    border: 1px solid var(--border-color);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    background-color: #f9f9f9;
}

.modal-title {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.modal-body {
    padding: 2rem;
}

.wechat-qr-container {
    text-align: center;
}

.wechat-qr-container img {
    max-width: 250px;
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.wechat-id-display {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-color);
    margin: 1rem 0;
}

/* === ABOUT PAGE RICH TEXT === */
.about-content-rich-text {
    color: var(--text-dark);
    line-height: 1.8;
}

.about-content-rich-text h1,
.about-content-rich-text h2,
.about-content-rich-text h3,
.about-content-rich-text h4,
.about-content-rich-text h5,
.about-content-rich-text h6 {
    color: var(--text-dark);
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.about-content-rich-text h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.about-content-rich-text h3 {
    font-size: 1.5rem;
}

.about-content-rich-text h4 {
    font-size: 1.25rem;
}

.about-content-rich-text p {
    margin-bottom: 1.25rem;
    color: var(--text-muted);
}

.about-content-rich-text ul,
.about-content-rich-text ol {
    margin-bottom: 1.25rem;
    padding-left: 2rem;
}

.about-content-rich-text li {
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.about-content-rich-text a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.about-content-rich-text a:hover {
    color: var(--text-dark);
    text-decoration: underline;
}

.about-content-rich-text strong,
.about-content-rich-text b {
    font-weight: 600;
    color: var(--text-dark);
}

.about-content-rich-text em,
.about-content-rich-text i {
    font-style: italic;
}

.about-content-rich-text blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--text-muted);
}

.about-content-rich-text img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 1.5rem 0;
}

.about-content-rich-text table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.about-content-rich-text table th,
.about-content-rich-text table td {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    text-align: left;
}

.about-content-rich-text table th {
    background-color: var(--bg-light);
    font-weight: 600;
    color: var(--text-dark);
}

/* === FOOTER === */
.footer {
    background-color: var(--accent-color);
    color: var(--white);
    padding: 3rem 0 1rem;
    margin-top: 5rem;
}

.footer a {
    color: var(--white);
}

.footer a:hover {
    color: #ccc;
}

/* Footer Social Buttons */
.btn-whatsapp-footer,
.btn-wechat-footer {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 4px;
    border: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    min-width: 120px;
}

.btn-whatsapp-footer {
    background-color: #25D366;
    color: var(--white);
}

.btn-whatsapp-footer:hover {
    background-color: #20BA5A;
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(37, 211, 102, 0.3);
}

.btn-wechat-footer {
    background-color: #25D366;
    color: var(--white);
}

.btn-wechat-footer:hover {
    background-color: #20BA5A;
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(37, 211, 102, 0.3);
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: 2rem;
    padding-top: 1rem;
    text-align: center;
    color: rgba(255,255,255,0.87);
}

/* === PAGINATION === */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.pagination .page-link {
    border-radius: 0;
    border: 1px solid var(--border-color);
    color: var(--text-dark);
    padding: 0.5rem 1rem;
}

.pagination .page-link:hover {
    background-color: var(--accent-color);
    color: var(--white);
    border-color: var(--accent-color);
}

.pagination .page-item.active .page-link {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

/* === ALERTS === */
.alert {
    border-radius: 0;
    border-left: 4px solid;
    border-right: none;
    border-top: none;
    border-bottom: none;
}

.alert-success {
    border-left-color: var(--success-green);
    background-color: #e8f5e9;
    color: #2e7d32;
}

.alert-danger {
    border-left-color: #d32f2f;
    background-color: #ffebee;
    color: #c62828;
}

/* === FOCUS STYLES (Keyboard Accessibility) === */
:focus-visible {
    outline: 2px solid var(--accent-gold);
    outline-offset: 2px;
}

.btn:focus-visible {
    outline: 2px solid var(--accent-gold);
    outline-offset: 2px;
    box-shadow: none;
}

.nav-link:focus-visible {
    outline: 2px solid var(--accent-gold);
    outline-offset: 2px;
}

.floating-btn:focus-visible {
    outline: 2px solid var(--white);
    outline-offset: 3px;
}

.scroll-to-top-btn:focus-visible {
    outline: 2px solid var(--accent-gold);
    outline-offset: 3px;
}

/* Skip to main content link (screen reader / keyboard users) */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--accent-color);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    z-index: 9999;
    font-weight: 600;
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
}

/* === UTILITY CLASSES === */
.text-muted {
    color: var(--text-light) !important;
}

.border-bottom {
    border-bottom: 1px solid var(--border-color) !important;
}

.bg-light {
    background-color: var(--bg-light) !important;
}

/* === PRODUCT VIDEO GALLERY === */
.product-video-gallery {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

.product-video-gallery h4 {
    color: var(--accent-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.video-gallery .video-container {
    background-color: #f8f9fa;
    border-radius: 8px;
    padding: 1rem;
    border: 1px solid var(--border-color);
}

.video-gallery video {
    border-radius: 6px;
    background-color: transparent;
}

.video-gallery .embed-responsive {
    position: relative;
    display: block;
    width: 100%;
    padding: 0;
    overflow: hidden;
    border-radius: 6px;
}

.instagram-embed {
    max-width: 540px;
    margin: 0 auto;
}

/* === RESPONSIVE ADJUSTMENTS === */
@media (max-width: 992px) {
    .product-info {
        padding-left: 0;
        margin-top: 2rem;
    }

    .main-image-container {
        height: 400px;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .product-video-gallery .video-container {
        padding: 0.75rem;
    }
}

@media (max-width: 576px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .product-cta {
        flex-direction: column;
    }

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

    .video-gallery video {
        max-height: 250px;
    }

    .video-gallery .embed-responsive-item {
        height: 200px !important;
    }
}

/* === LOGO STYLES === */
.navbar-brand .navbar-logo {
    max-height: 40px;
    width: auto;
    object-fit: contain;
    transition: opacity 0.3s ease;
}

.navbar-brand:hover .navbar-logo {
    opacity: 0.8;
}

/* Responsive Logo */
@media (max-width: 768px) {
    .navbar-brand .navbar-logo {
        max-height: 32px;
    }

    .navbar-brand {
        font-size: 1.25rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand .navbar-logo {
        max-height: 28px;
    }

    .navbar-brand {
        font-size: 1.125rem;
    }
}

/* === FLOATING SOCIAL BUTTONS === */
.floating-social-buttons {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.floating-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #fff;
    text-decoration: none;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    position: relative;
}

.floating-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
    color: #fff;
}

.floating-btn:active {
    transform: translateY(-1px);
}

.floating-btn-whatsapp {
    background-color: #25D366;
}

.floating-btn-whatsapp:hover {
    background-color: #20BA5A;
}

.floating-btn-wechat {
    background-color: #07C160;
}

.floating-btn-wechat:hover {
    background-color: #06A050;
}

/* === SCROLL TO TOP BUTTON === */
.scroll-to-top-btn {
    position: fixed;
    bottom: 160px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.scroll-to-top-btn.show {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top-btn:hover {
    background-color: #333;
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.scroll-to-top-btn:active {
    transform: translateY(-1px);
}

/* Responsive adjustments for floating buttons */
@media (max-width: 768px) {
    .floating-social-buttons {
        bottom: 15px;
        right: 15px;
        gap: 10px;
    }
    
    .floating-btn {
        width: 50px;
        height: 50px;
        font-size: 22px;
    }
    
    .scroll-to-top-btn {
        bottom: 135px;
        right: 15px;
        width: 45px;
        height: 45px;
        font-size: 24px;
    }
}

@media (max-width: 576px) {
    .floating-social-buttons {
        bottom: 10px;
        right: 10px;
        gap: 8px;
    }
    
    .floating-btn {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
    
    .scroll-to-top-btn {
        bottom: 125px;
        right: 10px;
        width: 42px;
        height: 42px;
        font-size: 22px;
    }
}