/**
 * Cyber News - Stylesheet
 * Stile editoriale ispirato a Tom's Hardware e Punto-Informatico
 */

/* Reset e Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colori principali */
    --primary-color: #1a1a2e;
    --secondary-color: #16213e;
    --accent-color: #0f3460;
    --highlight-color: #e94560;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-primary);
    background-color: var(--bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.site-header {
    background: var(--bg-white);
    color: var(--text-primary);
    padding: calc(var(--spacing-md) / 4) 0; /* Altezza ridotta */
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

/* Effetto blur leggero solo allo scroll (opzionale) */
.site-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.logo a {
    color: var(--text-primary);
    display: block;
}

.logo h1 {
    font-size: 1.5rem; /* Ridotto da 2rem */
    font-weight: 800;
    margin-bottom: -10px; /* Ridotto */
    letter-spacing: 0px;
    color: var(--primary-color);
}

.logo .tagline {
    font-size: 0.75rem; /* Ridotto da 0.875rem */
    color: var(--text-secondary);
    font-weight: 400;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.main-nav a {
    color: var(--text-primary);
    font-weight: 500;
    padding: calc(var(--spacing-xs) / 4) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    font-size: 0.9375rem; /* Leggermente ridotto */
}

.main-nav a:hover,
.main-nav a.active {
    background-color: var(--bg-light);
    color: var(--accent-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: calc(var(--spacing-xs) / 2);
    color: var(--text-primary);
    transition: color 0.3s ease;
    border-radius: var(--radius-sm);
}

.search-toggle:hover {
    color: var(--accent-color);
    background-color: var(--bg-light);
}

.search-toggle svg {
    width: 20px;
    height: 20px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
}

/* Search Form */
.search-form-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    z-index: 2000;
    padding: var(--spacing-md);
    transform: translateY(-100%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    pointer-events: none;
}

.search-form-container.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
}

.search-form {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    position: relative;
}

.search-form input[type="text"] {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.search-form input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-color);
}

.search-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background 0.3s ease;
}

.search-submit:hover {
    background: var(--highlight-color);
}

.search-submit svg {
    width: 20px;
    height: 20px;
}

.search-close {
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--text-secondary);
    transition: color 0.3s ease;
    border-radius: var(--radius-sm);
}

.search-close:hover {
    color: var(--text-primary);
    background-color: var(--bg-light);
}

.search-close svg {
    width: 20px;
    height: 20px;
}

/* Search Results */
.search-results {
    max-width: 100%;
}

.search-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.search-info {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.no-results,
.search-placeholder {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.no-results p,
.search-placeholder p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

/* Highlight search terms */
mark {
    background-color: #fff3cd;
    color: var(--primary-color);
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 600;
}

/* Main Content */
.main-content {
    padding: var(--spacing-xl) 0;
    min-height: 60vh;
}

/* Featured Article */
.featured-article {
    margin-bottom: var(--spacing-xl);
}

.featured-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    min-height: 400px;
}

.featured-image {
    position: relative;
    overflow: hidden;
    background: var(--primary-color);
}

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

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

.featured-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    background: var(--highlight-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.featured-content {
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    align-items: center;
}

.article-meta .category {
    background: var(--accent-color);
    color: white;
    padding: 0.25rem var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.article-meta .date {
    color: var(--text-secondary);
}

.featured-title {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.featured-title a {
    color: var(--text-primary);
}

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

.featured-excerpt {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.read-more {
    display: inline-block;
    color: var(--accent-color);
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--accent-color);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    align-self: flex-start;
}

.read-more:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Section Title */
.section-title {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    padding-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--accent-color);
}

/* Articles Grid */
.articles-grid {
    margin-top: var(--spacing-xl);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.article-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.article-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--primary-color);
}

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

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

.article-content {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-title {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

.article-title a {
    color: var(--text-primary);
}

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

.article-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.article-link {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.875rem;
    align-self: flex-start;
    margin-top: auto;
}

.article-link:hover {
    text-decoration: underline;
}

/* No Articles */
.no-articles {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
}

/* Category Header */
.category-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 3px solid var(--accent-color);
}

.breadcrumb {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.breadcrumb a {
    color: var(--accent-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.category-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.category-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.category-count {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-md);
}

.pagination-link {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.3s ease;
}

.pagination-link:hover {
    background: var(--highlight-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pagination-info {
    color: var(--text-secondary);
}

/* Load More Button */
.load-more-container {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
}

.load-more-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.load-more-btn:hover:not(:disabled) {
    background: var(--highlight-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.load-more-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.load-more-btn.loading {
    position: relative;
    color: transparent;
}

.load-more-btn.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.error-message {
    text-align: left;
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin: var(--spacing-md) 0;
}

.error-message h3 {
    color: #856404;
    margin-bottom: var(--spacing-sm);
}

.error-message p {
    color: #856404;
    margin-bottom: var(--spacing-sm);
}

.debug-link {
    display: inline-block;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--accent-color);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 600;
}

.debug-link:hover {
    background: var(--highlight-color);
    color: white;
}

/* Footer */
.site-footer {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-section a:hover {
    color: white;
}

/* Footer Navigation - Due colonne di categorie */
.footer-navigation .footer-categories-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.footer-categories-col {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-categories-col li {
    margin-bottom: var(--spacing-xs);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .main-nav {
        display: none;
        width: 100%;
        background: var(--bg-white);
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
        margin-top: var(--spacing-sm);
        box-shadow: var(--shadow-sm);
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .main-nav a {
        color: var(--text-primary);
    }
    
    /* Footer categories columns responsive */
    .footer-navigation .footer-categories-columns {
        grid-template-columns: 1fr; /* Stack su mobile */
        gap: var(--spacing-sm);
    }
    
    .main-nav a:hover,
    .main-nav a.active {
        background-color: var(--bg-light);
        color: var(--accent-color);
    }

    .featured-card {
        grid-template-columns: 1fr;
    }

    .featured-image {
        height: 250px;
    }

    .featured-title {
        font-size: 1.75rem;
    }

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

    .logo h1 {
        font-size: 1.5rem;
    }
    
    /* Search responsive */
    .header-actions {
        gap: var(--spacing-xs);
    }
    
    .search-form {
        flex-wrap: wrap;
    }
    
    .search-form input[type="text"] {
        width: 100%;
    }
    
    .search-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .featured-content {
        padding: var(--spacing-md);
    }

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

    .featured-excerpt {
        font-size: 1rem;
    }

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

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

.article-card,
.featured-card {
    animation: fadeIn 0.5s ease-out;
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .mobile-menu-toggle {
        display: none;
    }

    .main-content {
        padding: 0;
    }

    .article-card,
    .featured-card {
        box-shadow: none;
        border: 1px solid var(--border-color);
        break-inside: avoid;
    }
}