:root {
    --primary: #00b4db;
    --secondary: #0083b0;
    --text: #2c3e50;
    --bg: #f5f7fa;
    --card: #ffffff;
    --border: rgba(0, 0, 0, 0.1);
}

* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
    font-family: Vazir, sans-serif; 
}

body { 
    background: var(--bg); 
    color: var(--text); 
    line-height: 1.8; 
}

.container { 
    max-width: 1200px; 
    margin: 0 auto; 
    padding: 40px 20px; 
}

.page-header { 
    text-align: center; 
    margin-bottom: 60px; 
}

.page-title { 
    font-size: 2.5rem; 
    background: linear-gradient(to right, var(--primary), var(--secondary)); 
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; 
    margin-bottom: 20px;
}

/* استایل گرید مقالات */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 40px;
}

/* استایل کارت هر مقاله */
.article-card {
    background: var(--card);
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.08);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.article-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 45px rgba(0,0,0,0.12);
}

.article-card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.article-card-content {
    padding: 30px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.article-card-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text);
}

.article-card-excerpt {
    font-size: 1rem;
    flex-grow: 1;
    margin-bottom: 25px;
    color: #666;
    line-height: 1.7;
}

.btn { 
    padding: 16px 32px; 
    border: none; 
    border-radius: 50px; 
    font-size: 1rem; 
    cursor: pointer; 
    transition: all 0.4s ease; 
    display: inline-flex; 
    align-items: center; 
    justify-content: center; 
    gap: 12px; 
    box-shadow: 0 8px 20px rgba(0,0,0,0.15); 
    text-decoration: none; 
    font-weight: bold;
}

.btn-primary { 
    background: linear-gradient(to right, var(--primary), var(--secondary)); 
    color: white; 
}

.btn:hover { 
    transform: translateY(-7px) scale(1.05); 
    box-shadow: 0 12px 25px rgba(0,0,0,0.2);
}

/* ریسپانسیو برای تبلت */
@media (max-width: 1024px) {
    .container {
        padding: 30px 20px;
    }
    
    .page-title {
        font-size: 2.2rem;
    }
    
    .articles-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 30px;
    }
    
    .article-card-content {
        padding: 25px;
    }
}

/* ریسپانسیو برای موبایل */
@media (max-width: 768px) {
    .container {
        padding: 20px 15px;
    }
    
    .page-header {
        margin-bottom: 40px;
    }
    
    .page-title {
        font-size: 1.8rem;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .article-card {
        border-radius: 15px;
    }
    
    .article-card-image {
        height: 200px;
    }
    
    .article-card-content {
        padding: 20px;
    }
    
    .article-card-title {
        font-size: 1.3rem;
    }
    
    .btn {
        padding: 14px 28px;
        font-size: 0.9rem;
    }
}

/* ریسپانسیو برای موبایل‌های کوچک */
@media (max-width: 480px) {
    .container {
        padding: 15px 10px;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .article-card-image {
        height: 180px;
    }
    
    .article-card-content {
        padding: 15px;
    }
    
    .article-card-title {
        font-size: 1.2rem;
    }
    
    .article-card-excerpt {
        font-size: 0.9rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.85rem;
    }
}