:root {
    --primary-color: #0D2865;
    --secondary-color: #ffffff;
    --accent-color: #FF9F00;
    --gradient-start: #0D2865;
    --gradient-end: #6B3FA0;
}

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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
}

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

.header {
    background: rgba(255, 255, 255, 0.95);
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.main-content {
    margin-top: 40px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.feature-item {
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
}

.article-container {
    background: white;
    padding: 30px;
    border-radius: 15px;
    margin-top: 40px;
}

.article-container h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
}

.article-container h3 {
    color: var(--primary-color);
    margin: 25px 0 15px;
}

pre {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 15px 0;
}

code {
    font-family: 'Consolas', monospace;
    font-size: 14px;
}

.feature-image {
    width: 100%;
    max-width: 320px;
    height: auto;
    border-radius: 10px;
    margin: 10px auto;
}

.grid-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin: 20px 0;
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

.notice {
    background: rgba(255, 159, 0, 0.1);
    padding: 10px;
    border-radius: 5px;
    margin: 20px 0;
    text-align: center;
    color: var(--accent-color);
}

.fade-in {
    animation: fadeIn 1s ease-in-out;
}

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