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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --light: #f8fafc;
    --dark: #1e293b;
    --success: #10b981;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

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

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
    margin-bottom: 3rem;
}

.header h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, #fff 0%, #e2e8f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Intro section */
.intro {
    background: white;
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 3rem;
    text-align: center;
}

.intro p {
    color: var(--secondary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.stats span {
    background: var(--light);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Sites Grid */
.sites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.site-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 2px solid transparent;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.site-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    border-color: var(--primary);
}

.card-header {
    background: linear-gradient(135deg, var(--light) 0%, #e2e8f0 100%);
    padding: 1.5rem;
    text-align: center;
}

.folder-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.card-header h3 {
    color: var(--dark);
    font-size: 1.25rem;
    margin: 0;
}

.card-body {
    padding: 1.5rem;
    flex-grow: 1;
}

.card-body p {
    color: var(--secondary);
    margin-bottom: 1rem;
}

.visit-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    width: 100%;
    justify-content: center;
    margin-top: auto;
}

.visit-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

/* SEO Content */
.seo-content {
    background: white;
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 3rem;
}

.seo-content h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--dark);
    font-size: 2rem;
}

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

.feature {
    text-align: center;
    padding: 1.5rem;
    border-radius: var(--radius);
    background: var(--light);
}

.feature h3 {
    color: var(--primary);
    margin-bottom: 1rem;
}

/* Footer */
.footer {
    background: var(--dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: 4rem;
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: var(--transition);
}

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

/* Loading */
.loading {
    text-align: center;
    padding: 3rem;
    grid-column: 1 / -1;
    color: var(--secondary);
    font-size: 1.1rem;
}

/* Responsividade */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
    }
    
    .sites-grid {
        grid-template-columns: 1fr;
    }
    
    .stats {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 2rem 0;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .seo-content {
        padding: 1.5rem;
    }
}