/* FilterVina Main Styles - Professional Air Filtration Solutions */

:root {
    /* FilterVina Brand Colors - Industrial/Technical Theme */
    --filtervina-primary: #1a4d72;      /* Deep Blue - Industrial */
    --filtervina-secondary: #2c6aa0;    /* Medium Blue */
    --filtervina-accent: #4a90c2;       /* Light Blue */
    --filtervina-success: #28a745;      /* Green - Clean Air */
    --filtervina-warning: #ffc107;      /* Amber - Caution */
    --filtervina-danger: #dc3545;       /* Red - Alerts */

    /* Neutral Colors */
    --filtervina-dark: #2c3e50;         /* Dark Grey */
    --filtervina-medium: #6c757d;       /* Medium Grey */
    --filtervina-light: #f8f9fa;        /* Light Grey */
    --filtervina-white: #ffffff;

    /* Technical/Industrial Colors */
    --filtervina-steel: #bdc3c7;        /* Steel Grey */
    --filtervina-charcoal: #34495e;     /* Charcoal */
    --filtervina-silver: #ecf0f1;       /* Silver */

    /* Typography */
    --filtervina-font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --filtervina-font-technical: 'Courier New', Courier, monospace;

    /* Spacing & Sizing */
    --filtervina-header-height: 80px;
    --filtervina-nav-height: 60px;
    --filtervina-border-radius: 4px;
    --filtervina-shadow: 0 2px 10px rgba(26, 77, 114, 0.1);
    --filtervina-shadow-hover: 0 4px 20px rgba(26, 77, 114, 0.2);
}

/* Global Styles */
* {
    box-sizing: border-box;
}

body.filtervina-body {
    font-family: var(--filtervina-font-primary);
    color: var(--filtervina-dark);
    background-color: var(--filtervina-white);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--filtervina-primary);
    font-weight: 600;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
    border-bottom: 3px solid var(--filtervina-accent);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    color: var(--filtervina-secondary);
}

.filtervina-technical-text {
    font-family: var(--filtervina-font-technical);
    background-color: var(--filtervina-silver);
    padding: 0.25rem 0.5rem;
    border-radius: var(--filtervina-border-radius);
    border-left: 3px solid var(--filtervina-primary);
}

/* Buttons */
.btn-filtervina-primary {
    background-color: var(--filtervina-primary);
    border-color: var(--filtervina-primary);
    color: var(--filtervina-white);
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: var(--filtervina-border-radius);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.btn-filtervina-primary:hover,
.btn-filtervina-primary:focus {
    background-color: var(--filtervina-secondary);
    border-color: var(--filtervina-secondary);
    color: var(--filtervina-white);
    transform: translateY(-2px);
    box-shadow: var(--filtervina-shadow-hover);
}

.btn-filtervina-outline {
    background-color: transparent;
    border: 2px solid var(--filtervina-primary);
    color: var(--filtervina-primary);
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: var(--filtervina-border-radius);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.btn-filtervina-outline:hover,
.btn-filtervina-outline:focus {
    background-color: var(--filtervina-primary);
    color: var(--filtervina-white);
    transform: translateY(-2px);
}

/* Cards & Containers */
.filtervina-card {
    background: var(--filtervina-white);
    border-radius: var(--filtervina-border-radius);
    box-shadow: var(--filtervina-shadow);
    padding: 2rem;
    margin-bottom: 2rem;
    border-left: 4px solid var(--filtervina-accent);
    transition: all 0.3s ease;
}

.filtervina-card:hover {
    box-shadow: var(--filtervina-shadow-hover);
    transform: translateY(-3px);
}

.filtervina-card-header {
    background: linear-gradient(135deg, var(--filtervina-primary), var(--filtervina-secondary));
    color: var(--filtervina-white);
    padding: 1rem 1.5rem;
    margin: -2rem -2rem 2rem -2rem;
    border-radius: var(--filtervina-border-radius) var(--filtervina-border-radius) 0 0;
}

.filtervina-card-header h3,
.filtervina-card-header h4 {
    color: var(--filtervina-white);
    margin-bottom: 0;
}

/* Technical Specifications */
.filtervina-specs {
    background-color: var(--filtervina-silver);
    border: 1px solid var(--filtervina-steel);
    border-radius: var(--filtervina-border-radius);
    padding: 1.5rem;
}

.filtervina-specs table {
    width: 100%;
    margin: 0;
}

.filtervina-specs th {
    background-color: var(--filtervina-primary);
    color: var(--filtervina-white);
    padding: 0.75rem;
    font-weight: 600;
    border: none;
}

.filtervina-specs td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--filtervina-steel);
    background-color: var(--filtervina-white);
}

.filtervina-specs tr:last-child td {
    border-bottom: none;
}

/* Navigation Styles */
.main-content {
    min-height: calc(100vh - var(--filtervina-header-height) - var(--filtervina-nav-height) - 200px);
    padding-top: 2rem;
    padding-bottom: 2rem;
}

/* Section Dividers */
.filtervina-section {
    padding: 4rem 0;
}

.filtervina-section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.filtervina-section-header::after {
    content: '';
    display: block;
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--filtervina-primary), var(--filtervina-accent));
    margin: 1rem auto;
}

/* Product Grid */
.filtervina-product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

/* Filter Categories */
.filtervina-filter-category {
    background: linear-gradient(135deg, var(--filtervina-light), var(--filtervina-silver));
    border: 2px solid var(--filtervina-steel);
    border-radius: var(--filtervina-border-radius);
    padding: 1rem;
    text-align: center;
    transition: all 0.3s ease;
}

.filtervina-filter-category:hover {
    border-color: var(--filtervina-primary);
    transform: scale(1.02);
}

.filtervina-filter-category i {
    font-size: 2.5rem;
    color: var(--filtervina-primary);
    margin-bottom: 1rem;
    display: block;
}

/* Badges & Labels */
.filtervina-badge {
    background-color: var(--filtervina-primary);
    color: var(--filtervina-white);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filtervina-badge-success {
    background-color: var(--filtervina-success);
}

.filtervina-badge-warning {
    background-color: var(--filtervina-warning);
    color: var(--filtervina-dark);
}

/* Language Switcher Preview */
.filtervina-lang-switch {
    display: flex;
    gap: 0.5rem;
}

.filtervina-lang-btn {
    background: none;
    border: 1px solid var(--filtervina-steel);
    color: var(--filtervina-medium);
    padding: 0.25rem 0.75rem;
    border-radius: var(--filtervina-border-radius);
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.2s ease;
    text-decoration: none;
}

.filtervina-lang-btn:hover,
.filtervina-lang-btn.active {
    background-color: var(--filtervina-primary);
    border-color: var(--filtervina-primary);
    color: var(--filtervina-white);
    text-decoration: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --filtervina-header-height: 70px;
        --filtervina-nav-height: 50px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .filtervina-card {
        padding: 1.5rem;
    }

    .filtervina-product-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1rem;
    }

    .btn-filtervina-primary,
    .btn-filtervina-outline {
        padding: 0.625rem 1.5rem;
        font-size: 0.875rem;
    }
}

/* Loading States */
.filtervina-loading {
    position: relative;
    pointer-events: none;
}

.filtervina-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.filtervina-loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    border: 3px solid var(--filtervina-steel);
    border-top: 3px solid var(--filtervina-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 1001;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Contact Page Styles */
.contact-hero {
    background: linear-gradient(135deg, var(--filtervina-primary) 0%, var(--filtervina-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.contact-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="white" stroke-width="0.3" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>') repeat;
    z-index: 0;
}

.contact-hero .container {
    position: relative;
    z-index: 1;
}

.contact-info-cards {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-card {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--filtervina-border-radius);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateX(5px);
}

.contact-card.emergency-card {
    border-left: 4px solid var(--filtervina-warning);
}

.contact-card.tech-card {
    border-left: 4px solid #17a2b8;
}

.contact-card.sales-card {
    border-left: 4px solid var(--filtervina-success);
}

.contact-forms-section {
    background: var(--filtervina-white);
}

.contact-type-tabs {
    margin-bottom: 2rem;
}

.contact-tabs {
    border-radius: var(--filtervina-border-radius);
    overflow: hidden;
    box-shadow: var(--filtervina-shadow);
}

.contact-tabs .btn {
    border: none;
    padding: 1rem 1.5rem;
    font-weight: 600;
    border-radius: 0;
    background: var(--filtervina-light);
    color: var(--filtervina-dark);
    transition: all 0.3s ease;
}

.contact-tabs .btn:hover {
    background: var(--filtervina-silver);
    color: var(--filtervina-primary);
}

.contact-tabs .btn-check:checked + .btn {
    background: var(--filtervina-primary);
    color: white;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.contact-form-container {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.contact-form-container .card {
    border: 1px solid #e9ecef;
    transition: box-shadow 0.3s ease;
}

.contact-form-container .card:hover {
    box-shadow: var(--filtervina-shadow-hover);
}

.contact-form-container .card-header {
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    padding: 1rem 1.5rem;
}

.contact-form-container .card-body {
    padding: 2rem;
}

.form-label {
    font-weight: 600;
    color: var(--filtervina-dark);
    margin-bottom: 0.5rem;
}

.form-control,
.form-select {
    border: 2px solid #e9ecef;
    border-radius: var(--filtervina-border-radius);
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--filtervina-primary);
    box-shadow: 0 0 0 0.2rem rgba(26, 77, 114, 0.25);
}

.form-control.is-invalid,
.form-select.is-invalid {
    border-color: var(--filtervina-danger);
}

.form-check-input {
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.form-check-input:checked {
    background-color: var(--filtervina-primary);
    border-color: var(--filtervina-primary);
}

.form-check-label {
    font-weight: 500;
    color: var(--filtervina-dark);
    cursor: pointer;
}

.btn[type="submit"] {
    padding: 1rem 2rem;
    font-weight: 600;
    border-radius: var(--filtervina-border-radius);
    transition: all 0.3s ease;
    box-shadow: var(--filtervina-shadow);
}

.btn[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: var(--filtervina-shadow-hover);
}

.btn-primary[type="submit"] {
    background: linear-gradient(135deg, var(--filtervina-primary), var(--filtervina-secondary));
    border: none;
}

.btn-info[type="submit"] {
    background: linear-gradient(135deg, #17a2b8, #20c997);
    border: none;
    color: white;
}

.btn-success[type="submit"] {
    background: linear-gradient(135deg, var(--filtervina-success), #20c997);
    border: none;
}

.company-info-section {
    background: linear-gradient(135deg, var(--filtervina-light) 0%, var(--filtervina-silver) 100%);
}

.info-card .card {
    border: none;
    box-shadow: var(--filtervina-shadow);
    transition: all 0.3s ease;
}

.info-card .card:hover {
    transform: translateY(-5px);
    box-shadow: var(--filtervina-shadow-hover);
}

.info-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--filtervina-primary), var(--filtervina-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.info-icon i {
    font-size: 1.5rem;
    color: white;
}

.info-card h5 {
    color: var(--filtervina-dark);
    font-weight: 700;
    margin-bottom: 1rem;
}

.info-card .text-muted {
    color: var(--filtervina-medium) !important;
    line-height: 1.6;
}

/* Loading indicators for forms */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* Form validation styling */
.was-validated .form-control:valid {
    border-color: var(--filtervina-success);
}

.was-validated .form-control:invalid {
    border-color: var(--filtervina-danger);
}

.was-validated .form-select:valid {
    border-color: var(--filtervina-success);
}

.was-validated .form-select:invalid {
    border-color: var(--filtervina-danger);
}

.invalid-feedback {
    color: var(--filtervina-danger);
    font-weight: 500;
    margin-top: 0.5rem;
}

.valid-feedback {
    color: var(--filtervina-success);
    font-weight: 500;
    margin-top: 0.5rem;
}

/* Response area styling */
#form-response {
    animation: slideDown 0.5s ease-in-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        max-height: 200px;
        transform: translateY(0);
    }
}

/* Mobile responsiveness for contact page */
@media (max-width: 768px) {
    .contact-hero {
        text-align: center;
        padding: 3rem 0;
    }

    .contact-info-cards {
        margin-top: 2rem;
    }

    .contact-tabs {
        flex-direction: column;
    }

    .contact-tabs .btn {
        margin-bottom: 0.5rem;
        border-radius: var(--filtervina-border-radius) !important;
    }

    .contact-form-container .card-body {
        padding: 1.5rem;
    }

    .company-info-section .row {
        gap: 1.5rem 0;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    .contact-card:hover {
        transform: none;
        background: rgba(255, 255, 255, 0.1);
    }

    .btn[type="submit"]:hover {
        transform: none;
    }

    .info-card .card:hover {
        transform: none;
    }
}

/* Blog Page Styles */
.blogs-hero {
    background: linear-gradient(135deg, var(--filtervina-primary) 0%, var(--filtervina-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.blogs-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="white" opacity="0.1"/><circle cx="80" cy="40" r="1.5" fill="white" opacity="0.1"/><circle cx="40" cy="70" r="1" fill="white" opacity="0.1"/><circle cx="60" cy="10" r="1.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="2" fill="white" opacity="0.1"/><circle cx="90" cy="80" r="1" fill="white" opacity="0.1"/></svg>') repeat;
    z-index: 0;
}

.blogs-hero .container {
    position: relative;
    z-index: 1;
}

.hero-stats .stat-item {
    text-align: center;
    color: white;
}

.hero-stats .stat-number {
    font-size: 2rem;
    font-weight: 700;
    display: block;
    margin-bottom: 0.25rem;
}

.hero-stats .stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

.hero-search-card .card {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.topic-tags .badge {
    cursor: pointer;
    transition: all 0.3s ease;
}

.topic-tags .badge:hover {
    background-color: var(--filtervina-primary) !important;
    color: white !important;
    transform: scale(1.05);
}

.blogs-filter-bar {
    background: white;
    padding: 1rem;
    border-radius: var(--filtervina-border-radius);
    box-shadow: var(--filtervina-shadow);
}

.featured-article {
    position: relative;
}

.featured-image-container {
    position: relative;
    height: 300px;
    overflow: hidden;
}

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

.featured-article:hover .featured-image {
    transform: scale(1.05);
}

.placeholder-image {
    width: 100%;
    height: 100%;
    background: var(--filtervina-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.featured-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
}

.articles-grid .blog-card {
    transition: transform 0.3s ease;
}

.articles-grid .blog-card:hover {
    transform: translateY(-5px);
}

.article-image-container {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.article-image-container .card-img-top {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.blog-card:hover .card-img-top {
    transform: scale(1.1);
}

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

.blog-card:hover .article-overlay {
    opacity: 1;
}

.article-meta-overlay {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
}

.blogs-sidebar .sidebar-widget {
    margin-bottom: 2rem;
}

.sidebar-widget .widget-title {
    color: var(--filtervina-dark);
    font-weight: 700;
}

.recent-article-item {
    transition: background-color 0.3s ease;
}

.recent-article-item:hover {
    background-color: var(--filtervina-light);
    border-radius: var(--filtervina-border-radius);
    padding: 0.5rem;
    margin: -0.5rem;
}

.recent-article-image {
    height: 60px;
}

.recent-article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.placeholder-mini {
    width: 100%;
    height: 60px;
    background: var(--filtervina-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.recent-article-title {
    font-size: 0.9rem;
    line-height: 1.3;
}

.recent-article-title a:hover {
    color: var(--filtervina-primary) !important;
}

.topics-cloud .badge {
    font-size: 0.8rem;
    padding: 0.5rem 0.75rem;
    transition: all 0.3s ease;
}

.topics-cloud .badge:hover {
    background-color: var(--filtervina-primary) !important;
    color: white !important;
    text-decoration: none;
}

.newsletter-widget .newsletter-form .input-group .form-control {
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.newsletter-widget .newsletter-form .input-group .form-control::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.newsletter-widget .newsletter-form .input-group .form-control:focus {
    border-color: white;
    background: rgba(255, 255, 255, 0.2);
}

/* Blog Detail Page Styles */
.blog-content-section {
    background: white;
}

.article-header {
    border-bottom: 1px solid #e9ecef;
    padding-bottom: 2rem;
}

.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--filtervina-dark);
    line-height: 1.2;
}

.article-excerpt {
    font-size: 1.25rem;
    line-height: 1.6;
}

.social-share .btn {
    border-radius: 50px;
    padding: 0.5rem 1rem;
}

.article-featured-image img {
    max-height: 400px;
    width: 100%;
    object-fit: cover;
}

.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--filtervina-dark);
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--filtervina-dark);
    font-weight: 600;
}

.article-content h1 { font-size: 2rem; }
.article-content h2 { font-size: 1.75rem; }
.article-content h3 { font-size: 1.5rem; }
.article-content h4 { font-size: 1.25rem; }

.article-content p {
    margin-bottom: 1.5rem;
}

.article-content blockquote {
    border-left: 4px solid var(--filtervina-primary);
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    background: var(--filtervina-light);
    padding: 1.5rem;
    border-radius: var(--filtervina-border-radius);
}

.article-content code {
    background: var(--filtervina-light);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: var(--filtervina-font-technical);
    color: var(--filtervina-primary);
}

.article-content pre {
    background: var(--filtervina-dark);
    color: white;
    padding: 1.5rem;
    border-radius: var(--filtervina-border-radius);
    overflow-x: auto;
    margin: 2rem 0;
}

.article-content pre code {
    background: none;
    color: white;
    padding: 0;
}

.article-content ul,
.article-content ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--filtervina-border-radius);
    margin: 1.5rem 0;
    box-shadow: var(--filtervina-shadow);
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    border: 1px solid #e9ecef;
}

.article-content th,
.article-content td {
    padding: 0.75rem;
    border: 1px solid #e9ecef;
    text-align: left;
}

.article-content th {
    background: var(--filtervina-light);
    font-weight: 600;
}

.article-tags .badge {
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    background-color: var(--filtervina-light);
    color: var(--filtervina-dark);
    border: 1px solid #e9ecef;
}

.author-bio {
    background: var(--filtervina-light) !important;
}

.social-share-footer .social-buttons .btn {
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    margin: 0 0.5rem;
}

.btn-linkedin {
    background-color: #0077b5;
    color: white;
    border: none;
}

.btn-linkedin:hover {
    background-color: #005885;
    color: white;
}

.btn-twitter {
    background-color: #1da1f2;
    color: white;
    border: none;
}

.btn-twitter:hover {
    background-color: #0d8bd9;
    color: white;
}

.btn-facebook {
    background-color: #1877f2;
    color: white;
    border: none;
}

.btn-facebook:hover {
    background-color: #0c63d4;
    color: white;
}

.related-articles .related-article-card {
    transition: transform 0.3s ease;
}

.related-articles .related-article-card:hover {
    transform: translateY(-5px);
}

.related-article-image {
    height: 200px;
    overflow: hidden;
}

.related-article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

/* Table of Contents Styles */
.toc-widget .toc-list {
    max-height: 300px;
    overflow-y: auto;
}

.toc-list ul {
    margin: 0;
    padding: 0;
}

.toc-list li {
    margin-bottom: 0.5rem;
}

.toc-link {
    font-size: 0.9rem;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.toc-link:hover {
    color: var(--filtervina-primary) !important;
}

.toc-link.active {
    color: var(--filtervina-primary) !important;
    font-weight: 600;
}

/* Reading Progress Bar */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--filtervina-primary);
    z-index: 9999;
    transition: width 0.25s ease;
}

/* Mobile responsiveness for blog pages */
@media (max-width: 768px) {
    .blogs-hero {
        text-align: center;
        padding: 3rem 0;
    }

    .hero-search-card {
        margin-top: 2rem;
    }

    .featured-article .row {
        flex-direction: column;
    }

    .featured-image-container {
        height: 200px;
    }

    .articles-grid .col-md-6 {
        margin-bottom: 1.5rem;
    }

    .article-title {
        font-size: 2rem;
    }

    .article-content {
        font-size: 1rem;
    }

    .blog-sidebar {
        position: static !important;
        margin-top: 3rem;
    }

    .social-share-footer .social-buttons {
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
    }

    .social-share-footer .social-buttons .btn {
        margin: 0.25rem 0;
    }

    .related-articles .col-md-6 {
        margin-bottom: 1.5rem;
    }
}

/* Print styles for blog content */
@media print {
    .blog-sidebar,
    .social-share,
    .social-share-footer,
    .breadcrumb-section {
        display: none !important;
    }

    .blog-content-section {
        margin: 0 !important;
        padding: 0 !important;
    }

    .article-content {
        font-size: 12pt;
        line-height: 1.6;
    }

    .article-content h1,
    .article-content h2,
    .article-content h3 {
        page-break-after: avoid;
    }
}

/* Focus states for accessibility */
.toc-link:focus,
.recent-article-title a:focus,
.topics-cloud .badge:focus {
    outline: 2px solid var(--filtervina-primary);
    outline-offset: 2px;
}