body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #f4f6f8;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 25px;
    text-align: center;
}

nav {
    background-color: #34495e;
    padding: 12px;
    text-align: center;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 0 20px;
    font-weight: bold;
}

.container {
    max-width: 1000px;
    margin: auto;
    padding: 20px;
}

/* BOOK LIST */
.book {
    display: grid;
    grid-template-columns: 120px 1fr 120px;
    gap: 20px;
    background-color: white;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    align-items: center;
}

.book img {
    width: 120px;
    height: 170px;
    object-fit: cover;
    border-radius: 6px;
}

.info {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.price {
    color: #e74c3c;
    font-weight: bold;
}

button {
    background-color: #27ae60;
    color: white;
    border: none;
    padding: 8px 14px;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #219150;
}

/* CHI TIẾT */
.detail {
    display: flex;
    gap: 30px;
    background: white;
    padding: 20px;
    border-radius: 10px;
}

.detail img {
    width: 220px;
    height: 320px;
    object-fit: cover;
    border-radius: 8px;
}

footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 12px;
    margin-top: 30px;
}