/* Search Links Grid */
.search-links-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin: 30px 0;
}

.search-link-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 18px 30px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.search-link-btn svg {
    flex-shrink: 0;
}

.search-link-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    text-decoration: none;
}

/* رنگ‌های مختلف برای هر سرویس */
.search-link-btn.google {
    background: linear-gradient(135deg, #4285f4 0%, #34a853 100%);
    color: #ffffff;
}

.search-link-btn.google:hover {
    background: linear-gradient(135deg, #357ae8 0%, #2d9348 100%);
}

.search-link-btn.scholar {
    background: linear-gradient(135deg, #1a73e8 0%, #185abc 100%);
    color: #ffffff;
}

.search-link-btn.scholar:hover {
    background: linear-gradient(135deg, #1557b0 0%, #13478a 100%);
}

.search-link-btn.bing {
    background: linear-gradient(135deg, #008373 0%, #00b294 100%);
    color: #ffffff;
}

.search-link-btn.bing:hover {
    background: linear-gradient(135deg, #006b5e 0%, #009278 100%);
}

.search-link-btn.yahoo {
    background: linear-gradient(135deg, #7b0099 0%, #5f01d1 100%);
    color: #ffffff;
}

.search-link-btn.yahoo:hover {
    background: linear-gradient(135deg, #62007a 0%, #4a00a3 100%);
}

@media (max-width: 992px) {
    .search-links-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .search-links-grid {
        grid-template-columns: 1fr;
    }
    
    .search-link-btn {
        padding: 14px 18px;
        font-size: 0.95rem;
    }
}

/* Navigation Links Grid */
.navigation-links-grid {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 40px 0;
}

.nav-link-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 18px 35px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s;
    text-decoration: none;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    min-width: 200px;
}

.nav-link-btn svg {
    flex-shrink: 0;
}

.nav-link-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.6);
    text-decoration: none;
    color: #ffffff;
}

.nav-link-btn:active {
    transform: translateY(-1px);
}

/* رنگ‌های متمایز برای دکمه‌های مختلف */
.nav-link-btn.prev {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    box-shadow: 0 6px 20px rgba(245, 87, 108, 0.4);
}

.nav-link-btn.prev:hover {
    box-shadow: 0 10px 30px rgba(245, 87, 108, 0.6);
}

.nav-link-btn.next {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    box-shadow: 0 6px 20px rgba(79, 172, 254, 0.4);
}

.nav-link-btn.next:hover {
    box-shadow: 0 10px 30px rgba(79, 172, 254, 0.6);
}

@media (max-width: 576px) {
    .navigation-links-grid {
        flex-direction: column;
    }
    
    .nav-link-btn {
        width: 100%;
        padding: 16px 30px;
        font-size: 1rem;
    }
}