/*
==================================================================

ELVEA WEBSITE - BLOG COMPONENTS

Version: 1.0.0
Created: 2025-09-30
Last Modified: 2025-09-30 09:17 CEST
Description: Komponenty pre blog stránku - articles, search, categories, newsletter, lead magnets
Features: Interactive blog search, article filtering, download modals, newsletter signup
Author: ELVEA Development Team

==================================================================
*/

/* ============================================
BLOG SEARCH COMPONENTS
============================================ */

.blog-search {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.4s ease;
}

.blog-search.active {
    max-height: 200px;
    padding: 20px 0;
}

.blog-search__form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
}

.blog-search__input-wrapper {
    position: relative;
    max-width: 500px;
    width: 100%;
}

.blog-search__input {
    width: 100%;
    padding: 15px 50px 15px 20px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    background: var(--color-white);
    color: var(--color-text-primary);
}

.blog-search__input:focus {
    outline: 3px solid rgba(255, 255, 255, 0.3);
    outline-offset: 2px;
}

.blog-search__submit {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-accent);
    border: none;
    border-radius: 50%;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-standard);
}

.blog-search__submit:hover {
    background: var(--color-accent-dark);
    transform: translateY(-50%) scale(1.1);
}

.blog-search__submit svg {
    width: 18px;
    height: 18px;
    color: var(--color-white);
}

.blog-search__filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.blog-filter-btn {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--color-white);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-standard);
    font-weight: 600;
}

.blog-filter-btn:hover,
.blog-filter-btn--active {
    background: var(--color-white);
    color: var(--color-primary);
    border-color: var(--color-white);
}

.blog-search__close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: transparent;
    border: none;
    color: var(--color-white);
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-standard);
}

.blog-search__close:hover {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.blog-search__close svg {
    width: 20px;
    height: 20px;
}

/* ============================================
FEATURED ARTICLE COMPONENTS
============================================ */

.featured-article {
    padding: 80px 0;
    background: var(--bg-light);
}

.featured-article__content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
    align-items: start;
}

.featured-article__image {
    position: relative;
    border-radius: var(--border-radius-large);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
}

.featured-article__image img {
    width: 100%;
    height: auto;
    aspect-ratio: 4/3;
    object-fit: cover;
    transition: var(--transition-standard);
}

.featured-article__content:hover .featured-article__image img {
    transform: scale(1.05);
}

.featured-article__category {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.featured-article__text {
    padding: 20px 0;
}

.featured-article__title {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    color: var(--color-primary);
    margin-bottom: 15px;
    font-weight: 700;
    line-height: 1.3;
}

.featured-article__meta {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.featured-article__meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.featured-article__excerpt {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 25px;
}

.featured-article__highlights {
    background: var(--color-white);
    padding: 25px;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-accent);
    margin-bottom: 30px;
}

.featured-article__highlights h4 {
    color: var(--color-primary);
    margin-bottom: 15px;
    font-size: 1.1rem;
    font-weight: 700;
}

.featured-article__highlights ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.featured-article__highlights li {
    padding: 6px 0;
    position: relative;
    padding-left: 20px;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.featured-article__highlights li::before {
    content: "→";
    color: var(--color-accent);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.featured-article__cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--color-primary) 0%, #000066 100%);
    color: var(--color-white);
    padding: 15px 25px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-standard);
}

.featured-article__cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 128, 0.3);
}

/* ============================================
ARTICLES GRID COMPONENTS
============================================ */

.articles-grid {
    padding: 80px 0;
    background: var(--color-white);
}

.articles-grid__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.article-card {
    background: var(--bg-light);
    border-radius: var(--border-radius-large);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition-standard);
    border: 3px solid transparent;
}

.article-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-heavy);
    border-color: var(--color-primary);
}

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

.article-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-standard);
}

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

.article-card__category {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--color-accent);
    color: var(--color-white);
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article-card__content {
    padding: 25px;
}

.article-card__title {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: 12px;
    font-weight: 700;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card__meta {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.article-card__excerpt {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card__cta {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition-standard);
}

.article-card__cta:hover {
    color: var(--color-accent);
    transform: translateX(5px);
}

.article-card__cta::after {
    content: "→";
    transition: var(--transition-standard);
}

.article-card__cta:hover::after {
    transform: translateX(3px);
}

.articles-grid__load-more {
    text-align: center;
    margin-top: 60px;
}

.load-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: 15px 25px;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-standard);
    margin-bottom: 15px;
}

.load-more-btn:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

.load-more-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.load-more-note {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin: 0;
}

/* ============================================
CATEGORIES SECTION COMPONENTS
============================================ */

.categories-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.categories__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.category-card {
    background: var(--color-white);
    padding: 30px 25px;
    border-radius: var(--border-radius-large);
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition-standard);
    border: 3px solid transparent;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
    border-color: var(--color-primary);
}

.category-card__icon {
    color: var(--color-primary);
    margin-bottom: 20px;
    transition: var(--transition-standard);
}

.category-card:hover .category-card__icon {
    color: var(--color-accent);
    transform: scale(1.1);
}

.category-card__title {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: 12px;
    font-weight: 700;
}

.category-card__description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.category-card__count {
    background: var(--bg-light);
    color: var(--color-accent);
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 20px;
}

.category-card__cta {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition-standard);
}

.category-card__cta:hover {
    color: var(--color-accent);
    transform: translateX(3px);
}

.category-card__cta::after {
    content: "→";
    transition: var(--transition-standard);
}

/* ============================================
LEAD MAGNETS COMPONENTS
============================================ */

.lead-magnets {
    padding: 80px 0;
    background: var(--color-white);
}

.lead-magnets__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.lead-magnet {
    background: var(--bg-light);
    border-radius: var(--border-radius-large);
    padding: 30px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-light);
    transition: var(--transition-standard);
    border: 3px solid transparent;
}

.lead-magnet:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-color: var(--color-primary);
}

.lead-magnet__icon {
    color: var(--color-primary);
    margin-bottom: 20px;
    transition: var(--transition-standard);
}

.lead-magnet:hover .lead-magnet__icon {
    color: var(--color-accent);
    transform: scale(1.1);
}

.lead-magnet__content {
    flex: 1;
    margin-bottom: 25px;
}

.lead-magnet__title {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: 15px;
    font-weight: 700;
    line-height: 1.3;
}

.lead-magnet__description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.lead-magnet__features {
    list-style: none;
    margin: 0;
    padding: 0;
}

.lead-magnet__features li {
    padding: 6px 0;
    position: relative;
    padding-left: 20px;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.lead-magnet__features li::before {
    content: "✓";
    color: var(--color-accent);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.lead-magnet__download {
    border-top: 2px solid #e0e0e0;
    padding-top: 20px;
    text-align: center;
}

.lead-magnet__format {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin-bottom: 15px;
    font-weight: 500;
}

.lead-magnet__cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #228B22 100%);
    color: var(--color-white);
    border: none;
    padding: 12px 20px;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-standard);
}

.lead-magnet__cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(107, 142, 35, 0.3);
}

/* ============================================
DOWNLOAD MODAL COMPONENTS
============================================ */

.download-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.download-modal.active {
    opacity: 1;
    visibility: visible;
}

.download-modal__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    cursor: pointer;
}

.download-modal__content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--color-white);
    border-radius: var(--border-radius-large);
    padding: 40px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-heavy);
}

.download-modal__close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: transparent;
    border: none;
    font-size: 2rem;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--transition-standard);
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.download-modal__close:hover {
    color: var(--color-primary);
    transform: scale(1.1);
}

.download-modal__title {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 10px;
    font-weight: 700;
}

.download-modal__description {
    color: var(--color-text-secondary);
    margin-bottom: 30px;
    line-height: 1.6;
}

.download-modal__form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ============================================
NEWSLETTER COMPONENTS
============================================ */

.newsletter {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, #000066 100%);
    color: var(--color-white);
}

.newsletter__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.newsletter__title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    margin-bottom: 15px;
    font-weight: 700;
    color: var(--color-white);
}

.newsletter__description {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 25px;
    opacity: 0.9;
}

.newsletter__benefits {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.newsletter__benefit {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
}

.newsletter__benefit svg {
    color: var(--color-accent);
    flex-shrink: 0;
}

.newsletter__form {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: var(--border-radius-large);
    backdrop-filter: blur(10px);
}

.newsletter__form-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.newsletter__form .form-label {
    color: var(--color-white);
    font-weight: 600;
}

.newsletter__form .form-input {
    background: var(--color-white);
    border: 2px solid transparent;
    color: var(--color-text-primary);
}

.newsletter__form .form-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(107, 142, 35, 0.2);
}

.newsletter__form .form-checkbox__text {
    color: var(--color-white);
    opacity: 0.9;
}

.newsletter__form .form-checkbox__text a {
    color: var(--color-accent);
}

.newsletter__submit {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--color-accent);
    color: var(--color-white);
    border: none;
    padding: 15px 25px;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-standard);
    width: 100%;
    justify-content: center;
}

.newsletter__submit:hover {
    background: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(107, 142, 35, 0.4);
}

/* ============================================
ENHANCED ANIMATIONS
============================================ */

.article-card {
    animation: fadeInUp 0.6s ease-out;
}

.article-card:nth-child(1) { animation-delay: 0.1s; }
.article-card:nth-child(2) { animation-delay: 0.2s; }
.article-card:nth-child(3) { animation-delay: 0.3s; }
.article-card:nth-child(4) { animation-delay: 0.4s; }
.article-card:nth-child(5) { animation-delay: 0.5s; }
.article-card:nth-child(6) { animation-delay: 0.6s; }

.category-card {
    animation: fadeInScale 0.6s ease-out;
}

.category-card:nth-child(1) { animation-delay: 0.1s; }
.category-card:nth-child(2) { animation-delay: 0.2s; }
.category-card:nth-child(3) { animation-delay: 0.3s; }
.category-card:nth-child(4) { animation-delay: 0.4s; }
.category-card:nth-child(5) { animation-delay: 0.5s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Search activation animation */
.blog-search.active .blog-filter-btn {
    animation: slideInFromBottom 0.6s ease-out;
}

.blog-search.active .blog-filter-btn:nth-child(1) { animation-delay: 0.1s; }
.blog-search.active .blog-filter-btn:nth-child(2) { animation-delay: 0.2s; }
.blog-search.active .blog-filter-btn:nth-child(3) { animation-delay: 0.3s; }
.blog-search.active .blog-filter-btn:nth-child(4) { animation-delay: 0.4s; }
.blog-search.active .blog-filter-btn:nth-child(5) { animation-delay: 0.5s; }
.blog-search.active .blog-filter-btn:nth-child(6) { animation-delay: 0.6s; }

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

/* ============================================
RESPONSIVE DESIGN
============================================ */

@media (max-width: 768px) {
    .featured-article__content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .articles-grid__content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .categories__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .lead-magnets__grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter__content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .blog-search__filters {
        gap: 8px;
    }
    
    .blog-filter-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    
    .download-modal__content {
        padding: 30px 25px;
    }
}

@media (max-width: 425px) {
    .article-card__content,
    .category-card,
    .lead-magnet {
        padding: 20px;
    }
    
    .featured-article__text {
        padding: 15px 0;
    }
    
    .featured-article__highlights {
        padding: 20px;
    }
    
    .newsletter__form {
        padding: 25px 20px;
    }
    
    .categories__grid {
        grid-template-columns: 1fr;
    }
    
    .blog-search__filters {
        gap: 6px;
        overflow-x: auto;
        padding-bottom: 5px;
    }
    
    .blog-filter-btn {
        flex-shrink: 0;
        padding: 6px 10px;
        font-size: 0.75rem;
    }
    
    .download-modal__content {
        width: 95%;
        padding: 25px 20px;
    }
}

/* ============================================
ACCESSIBILITY & PERFORMANCE
============================================ */

@media (prefers-reduced-motion: reduce) {
    .article-card,
    .category-card,
    .lead-magnet,
    .blog-search,
    .download-modal {
        transition: none;
        animation: none;
    }
    
    .article-card__image img,
    .featured-article__image img {
        transition: none;
    }
}

.blog-filter-btn:focus,
.load-more-btn:focus,
.lead-magnet__cta:focus,
.newsletter__submit:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

.blog-search__input:focus {
    outline: 3px solid rgba(255, 255, 255, 0.3);
    outline-offset: 2px;
}

/* Performance hints */
.article-card,
.category-card,
.lead-magnet {
    will-change: transform;
}

.article-card__image img,
.featured-article__image img {
    will-change: transform;
}

/* ============================================
PRINT STYLES
============================================ */

@media print {
    .blog-search,
    .newsletter,
    .download-modal {
        display: none;
    }
    
    .article-card,
    .category-card,
    .featured-article {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .article-card__cta,
    .category-card__cta,
    .lead-magnet__cta {
        display: none;
    }
    
    .load-more-btn {
        display: none;
    }
}

/* ============================================
SPECIAL INTERACTIVE EFFECTS
============================================ */

/* Article card reading progress simulation */
.article-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    width: 0;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

.article-card:hover::after {
    width: 100%;
}

/* Newsletter form success state */
.newsletter__form.success {
    background: rgba(107, 142, 35, 0.2);
    border: 2px solid var(--color-accent);
}

.newsletter__form.success .newsletter__submit {
    background: var(--color-accent);
    pointer-events: none;
}

/* Download modal backdrop blur effect */
.download-modal.active .download-modal__overlay {
    backdrop-filter: blur(5px);
}

/* Category card icon pulse on hover */
.category-card:hover .category-card__icon {
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1.1); }
    50% { transform: scale(1.2); }
}

/* Lead magnet hover glow effect */
.lead-magnet:hover {
    box-shadow: var(--shadow-medium), 0 0 30px rgba(0, 0, 128, 0.1);
}