/**
 * Main Stylesheet - BizWisdom
 * Mobile-First Responsive Design
 */

/* ===================================
   RESET & BASE STYLES
   =================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Scheme - Professional & Clean */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-secondary: #10b981;
    --color-accent: #f59e0b;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-bg: #ffffff;
    --color-bg-light: #f9fafb;
    --color-border: #e5e7eb;
    --color-shadow: rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-heading: 'Georgia', serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

/* Fade-in animation for images */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   LAYOUT
   =================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-sm);
}

/* ===================================
   HEADER & NAVIGATION
   =================================== */

.site-header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px var(--color-shadow);
}

.header-top {
    padding: var(--spacing-sm) 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--color-primary);
}

.site-logo:hover {
    color: var(--color-primary-dark);
}

.site-tagline {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-top: 0.25rem;
}

/* Navigation */
.main-nav {
    display: none; /* Hidden on mobile, shown on desktop */
}

.nav-list {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
}

.nav-list a {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: var(--transition);
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text);
    cursor: pointer;
    padding: var(--spacing-xs);
    display: block;
}

/* Language Switcher */
.language-switcher {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.lang-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

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

/* Mobile Navigation */
.mobile-nav {
    display: none;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-sm);
}

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

.mobile-nav .nav-list {
    flex-direction: column;
    gap: 0;
}

.mobile-nav .nav-list li {
    border-bottom: 1px solid var(--color-border);
}

.mobile-nav .nav-list a {
    display: block;
    padding: var(--spacing-sm);
}

/* ===================================
   MAIN CONTENT
   =================================== */

.main-content {
    padding: var(--spacing-lg) 0;
    min-height: 50vh;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

/* ===================================
   ARTICLE GRID
   =================================== */

.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.article-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.article-card:hover {
    box-shadow: 0 4px 12px var(--color-shadow);
    transform: translateY(-2px);
}

.article-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: var(--transition);
}

.article-card:hover .article-image {
    opacity: 0.9;
}

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

.article-category {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    background: var(--color-primary);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 4px;
    margin-bottom: var(--spacing-sm);
    transition: var(--transition);
    width: fit-content;
}

.article-category:hover {
    background: var(--color-primary-dark);
    color: white;
}

.article-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    font-weight: 600;
    min-height: 3em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

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

.article-excerpt {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    font-size: 0.95rem;
    flex-grow: 1;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-xs);
    border-top: 1px solid var(--color-border);
}

.read-more-btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    background: var(--color-primary);
    color: white;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    text-align: center;
    margin-top: auto;
}

.read-more-btn:hover {
    background: var(--color-primary-dark);
    color: white;
    transform: translateX(3px);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

/* ===================================
   SIDEBAR
   =================================== */

.sidebar {
    display: none; /* Hidden on mobile */
}

.sidebar-widget {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.widget-title {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--color-primary);
}

.widget-list {
    list-style: none;
}

.widget-list li {
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-border);
}

.widget-list li:last-child {
    border-bottom: none;
}

.widget-list a {
    color: var(--color-text);
    display: block;
    transition: var(--transition);
}

.widget-list a:hover {
    color: var(--color-primary);
    padding-left: var(--spacing-xs);
}

/* ===================================
   FOOTER
   =================================== */

.site-footer {
    background: var(--color-text);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.footer-content {
    text-align: center;
}

.footer-nav {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

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

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

.copyright {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ===================================
   UTILITY CLASSES
   =================================== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.section-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

/* ===================================
   AD PLACEHOLDERS
   =================================== */

.ad-container {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm);
    background: var(--color-bg-light);
    border: 1px dashed var(--color-border);
    text-align: center;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-label {
    font-size: 0.75rem;
    color: var(--color-text-light);
    text-transform: uppercase;
}

/* ===================================
   LOADING & ANIMATIONS
   =================================== */

.loading {
    text-align: center;
    padding: var(--spacing-xl);
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ===================================
   BREADCRUMBS
   =================================== */

.breadcrumbs {
    padding: var(--spacing-sm) 0;
    margin-bottom: var(--spacing-md);
}

.breadcrumb-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
}

.breadcrumb-list li:not(:last-child)::after {
    content: '›';
    margin-left: var(--spacing-xs);
    color: var(--color-text-light);
}

.breadcrumb-list a {
    color: var(--color-text-light);
}

.breadcrumb-list a:hover {
    color: var(--color-primary);
}

.breadcrumb-list li:last-child {
    color: var(--color-text);
}