body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
    color: #333;
}

header {
    background-color: #4a90d9;
    color: white;
    padding: 20px;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 28px;
}

nav {
    background-color: #3a7bc8;
    padding: 10px;
    text-align: center;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    font-size: 16px;
}

nav a:hover {
    text-decoration: underline;
}

.container {
    max-width: 960px;
    margin: 30px auto;
    padding: 20px;
}

.container h2 {
    text-align: center;
    color: #4a90d9;
}

/* ── Search Bar ──────────────────────────────────────────── */
.search-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin: 20px 0;
}

.search-bar input {
    width: 320px;
    padding: 10px 14px;
    font-size: 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
    outline: none;
}

.search-bar input:focus {
    border-color: #4a90d9;
    box-shadow: 0 0 4px rgba(74, 144, 217, 0.4);
}

.search-bar button {
    padding: 10px 22px;
    font-size: 15px;
    background-color: #4a90d9;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.search-bar button:hover {
    background-color: #3a7bc8;
}

/* ── Error / loading messages ────────────────────────────── */
.xml-error {
    background-color: #fff3cd;
    border: 1px solid #ffc107;
    color: #856404;
    padding: 14px 20px;
    border-radius: 5px;
    text-align: center;
    margin: 20px 0;
    font-size: 15px;
}

.loading-msg,
.no-results {
    text-align: center;
    color: #888;
    font-size: 15px;
    width: 100%;
    margin-top: 20px;
}

/* ── Book Grid ───────────────────────────────────────────── */
.book-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 25px;
    margin-top: 20px;
}

.book-card {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 15px;
    width: 180px;
    text-align: center;
    overflow: hidden;
}

.book-card img {
    max-width: 100%;
    height: 220px;
    object-fit: cover;
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.2);
}

.book-card h3 {
    font-size: 15px;
    margin: 10px 0 5px 0;
    color: #333;
}

.book-card p {
    font-size: 14px;
    color: #666;
    margin: 3px 0;
}

.book-card .price {
    font-size: 16px;
    font-weight: bold;
    color: #2a7a2a;
    margin: 8px 0;
}

.btn-add {
    display: inline-block;
    background-color: #4a90d9;
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
    border: none;
    cursor: pointer;
}

.btn-add:hover {
    background-color: #3a7bc8;
}

footer {
    background-color: #4a90d9;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 40px;
}