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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo a {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2563eb;
    text-decoration: none;
}

.nav {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover {
    color: #2563eb;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
    margin-top: 80px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    background: #fff;
    color: #2563eb;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
}

/* Section Styles */
.section {
    padding: 80px 0;
}

.section-alt {
    background: #f8fafc;
}

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

.mb-4 {
    margin-bottom: 2rem;
}

.mt-4 {
    margin-top: 2rem;
}

/* Grid System */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Card Styles */
.card {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.category-card {
    text-align: center;
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.category-card h3 {
    color: #2563eb;
    margin-bottom: 1rem;
}

/* Article Cards */
.article-card {
    padding: 0;
    overflow: hidden;
}

.article-card a {
    text-decoration: none;
    color: inherit;
    display: block;
}

.article-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.article-card h3 {
    padding: 1rem 1.5rem 0.5rem;
    color: #2563eb;
    font-size: 1.2rem;
}

.article-card p {
    padding: 0 1.5rem;
    color: #666;
    font-size: 0.9rem;
}

.article-meta {
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #888;
}

.article-category {
    background: #e0e7ff;
    color: #2563eb;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 500;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
}

.btn-secondary {
    background: #6b7280;
    color: white;
}

.btn-secondary:hover {
    background: #4b5563;
}

/* Newsletter Section */
.newsletter {
    background: #2563eb;
    color: white;
    padding: 60px 0;
    text-align: center;
}

.newsletter h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.newsletter-form {
    display: flex;
    max-width: 400px;
    margin: 2rem auto 0;
    gap: 10px;
}

.newsletter-form input {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
}

.newsletter-form button {
    background: #1d4ed8;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: #2563eb;
}

.footer-section a {
    display: block;
    color: #d1d5db;
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: #2563eb;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    text-align: center;
    color: #9ca3af;
}

/* Article Content Styles */
.article-content {
    margin-top: 80px;
    padding: 40px 0;
}

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

.article-header h1 {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.article-introduction {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    color: #4b5563;
}

.article-image {
    width: 100%;
    max-width: 800px;
    height: 400px;
    object-fit: cover;
    border-radius: 10px;
    margin: 2rem auto;
    display: block;
}

.article-body {
    max-width: 800px;
    margin: 0 auto;
}

.article-body h2 {
    color: #2563eb;
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
}

.article-body h3 {
    color: #374151;
    font-size: 1.4rem;
    margin: 1.5rem 0 1rem;
}

.article-body h4 {
    color: #4b5563;
    font-size: 1.2rem;
    margin: 1rem 0 0.5rem;
}

.article-body p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* Responsive Images */
img {
    max-width: 100%;
    height: auto;
}

.article-image {
    width: 100%;
    max-width: 800px;
    height: auto;
    min-height: 300px;
    object-fit: cover;
    border-radius: 10px;
    margin: 2rem auto;
    display: block;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        padding: 1rem;
        gap: 1rem;
    }
    
    .nav.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero h1 {
        font-size: 2.2rem;
        line-height: 1.2;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .newsletter-form {
        flex-direction: column;
        gap: 15px;
    }
    
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .grid-3 {
        grid-template-columns: 1fr;
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
    }
    
    .article-header h1 {
        font-size: 2.2rem;
        line-height: 1.2;
    }
    
    .article-body h2 {
        font-size: 1.6rem;
    }
    
    .article-body h3 {
        font-size: 1.3rem;
    }
    
    /* Melhorar área de toque */
    .nav a {
        padding: 12px 0;
        min-height: 44px;
        display: flex;
        align-items: center;
    }
    
    .btn {
        min-height: 44px;
        padding: 12px 20px;
    }
    
    .mobile-menu-toggle {
        min-height: 44px;
        min-width: 44px;
        padding: 8px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .article-header h1 {
        font-size: 1.8rem;
    }
    
    .article-body {
        padding: 0 10px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}