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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* Header */
header {
    background-color: #222;
    color: #fff;
    padding: 1rem 0;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.8rem;
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    padding: 5px 10px;
    transition: background-color 0.3s;
}

nav ul li a:hover {
    background-color: #444;
}

.search {
    display: flex;
    margin-left: 20px;
    gap: 5px;
}

.search input {
    padding: 5px;
    border: none;
    border-radius: 4px;
}

.search input[type="text"] {
    border-radius: 4px 0 0 4px;
}

.search input[type="date"] {
    border-radius: 0;
}

.search button {
    padding: 5px 10px;
    border: none;
    background-color: #007bff;
    color: #fff;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
}

.search button:last-child {
    border-radius: 0;
}

/* Ad Styles */
.ad-leaderboard {
    text-align: center;
    padding: 20px 0;
    background-color: #f8f8f8;
}

.ad-rectangle {
    margin-bottom: 20px;
}

.mobile-ad-footer {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: #fff;
    padding: 10px;
    text-align: center;
    border-top: 1px solid #ccc;
}

/* Main Content */
.content-wrapper {
    display: flex;
    gap: 20px;
}

.article-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.result-count {
    grid-column: 1 / -1;
    text-align: center;
    margin-bottom: 20px;
    color: #666;
    font-size: 0.9rem;
}

.sidebar {
    width: 300px;
    flex-shrink: 0;
}

/* Article Card */
.article-card {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

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

.article-content {
    padding: 15px;
}

.article-category {
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.article-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #222;
}

.article-title a {
    text-decoration: none;
    color: inherit;
}

.article-excerpt {
    color: #666;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #888;
}

/* Loading Spinner */
.loading-spinner {
    text-align: center;
    padding: 50px;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #007bff;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error Message */
.error-message {
    text-align: center;
    padding: 50px;
    color: #d9534f;
}

/* Footer */
footer {
    background-color: #222;
    color: #fff;
    padding: 20px 0;
    margin-top: 40px;
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

footer ul {
    list-style: none;
    display: flex;
}

footer ul li {
    margin-left: 20px;
}

footer ul li a {
    color: #fff;
    text-decoration: none;
}

/* Modal */
.modal {
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 600px;
    border-radius: 8px;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: #000;
}

/* Responsive Design */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 10px;
    }

    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }

    .search {
        margin-left: 0;
        justify-content: center;
        flex-wrap: wrap;
        gap: 5px;
    }

    .content-wrapper {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
    }

    .article-grid {
        grid-template-columns: 1fr;
    }

    .mobile-ad-footer {
        display: block;
    }

    footer .container {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}