/* Global Styles */
body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    background-color: #fcfcfc;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

/* Header & Navigation */
header {
    background-color: #fff;
    border-bottom: 1px solid #eaeaea;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
    z-index: 1001;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.nav-links a:hover {
    color: #888;
}

.cart-icon {
    font-weight: bold;
    display: flex;
    align-items: center;
    z-index: 1001;
}

.cart-icon a {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: #333;
    transition: all 0.3s ease-in-out;
}

/* Responsive Navigation */
@media (max-width: 768px) {
    nav {
        position: relative;
    }

    .hamburger {
        display: flex;
        order: 1; /* Keep it beside the logo or left of cart */
    }

    .cart-icon {
        order: 2;
        margin-left: auto;
    }

    .logo {
        margin-right: auto;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 60px;
        left: 0;
        background-color: #fff;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        padding: 20px 0;
        text-align: center;
        z-index: 1000;
    }

    .nav-links.active {
        display: flex;
    }
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 80px 20px;
    background-color: #f4f4f4;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 30px auto;
    color: #666;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: #333;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #555;
}

.btn:disabled {
    background-color: #999;
    cursor: not-allowed;
}

.empty-state {
    text-align: center;
    padding: 40px;
    background-color: #f9f9f9;
    border: 1px dashed #ccc;
    color: #777;
    margin: 20px 0;
}

/* Sections */
.section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Book Grid / List */
.book-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    justify-content: center;
}

.book-card {
    background: #fff;
    padding: 20px;
    border: 1px solid #eaeaea;
    text-align: center;
    max-width: 300px;
}

.book-card img {
    max-width: 100%;
    height: auto;
    margin-bottom: 20px;
}

@media (max-width: 480px) {
    .book-card {
        max-width: 100%;
    }
}

.book-title {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.book-price {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 20px;
}

/* Footer */
footer {
    background-color: #222;
    color: #fff;
    text-align: center;
    padding: 40px 0;
    margin-top: 60px;
}

footer p {
    margin: 0;
    font-size: 0.9rem;
}

/* Admin Panel */
.admin-container {
    max-width: 600px;
    margin: 40px auto;
    background: #fff;
    padding: 30px;
    border: 1px solid #eaeaea;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    box-sizing: border-box;
}