/* ========================================
   CSS Variables & Reset
   ======================================== */

:root {
    /* Color Palette - Professional Finance Theme */
    --color-primary: #1a5f3f;
    --color-primary-dark: #134431;
    --color-primary-light: #2d7a56;
    --color-secondary: #d4a574;
    --color-accent: #e67e22;
    
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #4a5568;
    --color-text-light: #718096;
    
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #f0f4f1;
    
    --color-border: #e2e8f0;
    --color-border-light: #edf2f7;
    
    /* Typography */
    --font-display: 'Fraunces', serif;
    --font-body: 'DM Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-base: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    -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-base);
}

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

ul {
    list-style: none;
}

/* ========================================
   Utility Classes
   ======================================== */

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

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

/* ========================================
   Ad Containers
   ======================================== */

.ad-container {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin: var(--spacing-lg) auto;
    text-align: center;
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.ad-label {
    font-size: 0.75rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.ad-header {
    max-width: 728px;
    min-height: 90px;
    margin-bottom: 0;
}

.ad-sidebar {
    max-width: 300px;
    min-height: 250px;
    position: sticky;
    top: 100px;
}

.ad-in-content {
    max-width: 728px;
    min-height: 90px;
}

.ad-footer {
    max-width: 728px;
    min-height: 90px;
    margin-top: var(--spacing-2xl);
}

/* ========================================
   Header
   ======================================== */

.site-header {
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
}

.logo-icon {
    font-size: 2rem;
}

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

/* Navigation */
.main-nav {
    flex: 1;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-menu a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

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

/* Search */
.header-search form {
    display: flex;
    align-items: center;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.header-search input {
    padding: 0.625rem 1rem;
    border: none;
    background: transparent;
    font-family: var(--font-body);
    font-size: 0.9rem;
    width: 200px;
    outline: none;
}

.header-search button {
    padding: 0.625rem 1rem;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
}

.header-search button:hover {
    color: var(--color-primary);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, rgba(26, 95, 63, 0.03) 100%);
    pointer-events: none;
}

.hero-content {
    max-width: 700px;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

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

/* ========================================
   Featured Article
   ======================================== */

.featured-article {
    padding: var(--spacing-3xl) 0;
}

.featured-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
    transition: var(--transition-base);
}

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

.featured-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    background: var(--color-accent);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    z-index: 10;
}

.featured-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.featured-image {
    position: relative;
    overflow: hidden;
}

.featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-base);
}

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

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

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

.category {
    background: var(--color-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.8rem;
}

.reading-time {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.featured-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

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

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

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

.read-more {
    color: var(--color-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-base);
}

.read-more:hover {
    gap: 0.75rem;
}

/* ========================================
   Latest Articles
   ======================================== */

.latest-articles {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-secondary);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.view-all {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-base);
}

.view-all:hover {
    gap: 0.5rem;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.article-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
}

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

.article-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

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

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

.category-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    background: var(--color-primary);
    color: white;
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
}

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

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

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

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

.article-excerpt {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    flex: 1;
}

/* ========================================
   Categories Section
   ======================================== */

.categories-section {
    padding: var(--spacing-3xl) 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.category-box {
    background: var(--color-bg-primary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.category-box:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.category-box h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.category-box p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.article-count {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

/* ========================================
   Newsletter Section
   ======================================== */

.newsletter-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.newsletter-box {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    color: white;
}

.newsletter-box h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.newsletter-box > p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
    margin: 0 auto var(--spacing-md);
}

.newsletter-form input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
}

.newsletter-form button {
    white-space: nowrap;
}

.newsletter-privacy {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* ========================================
   Footer
   ======================================== */

.site-footer {
    background: var(--color-text-primary);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-col h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-col p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-col a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-base);
}

.footer-col a:hover {
    color: white;
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.disclaimer-note {
    font-size: 0.85rem;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .featured-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
    }
    
    .mobile-menu-toggle {
        display: flex;
        order: 3;
    }
    
    .main-nav {
        order: 4;
        width: 100%;
        display: none;
    }
    
    .main-nav.active {
        display: block;
    }
    
    .nav-menu {
        flex-direction: column;
        align-items: stretch;
        padding: var(--spacing-md) 0;
    }
    
    .header-search {
        order: 2;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .ad-sidebar {
        position: static;
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }
    
    .hero {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-title {
        font-size: 1.875rem;
    }
    
    .featured-content {
        padding: var(--spacing-lg);
    }
    
    .featured-title {
        font-size: 1.5rem;
    }
}