* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #003366;
    --secondary-color: #0066cc;
    --accent-color: #ffc107;
    --text-dark: #262626;
    --text-light: #666;
    --bg-light: #f5f5f5;
    --white: #ffffff;
    --border-radius: 0.75rem;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 12px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

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

/* Navbar */
.navbar {
    background-color: var(--primary-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 50px;
    width: auto;
    transition: transform 0.3s;
}

.logo-img:hover {
    transform: scale(1.05);
}

.logo h1 {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent-color);
}

.cart-btn {
    background-color: var(--accent-color);
    color: var(--text-dark);
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

.cart-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.cart-count {
    background-color: #ff4444;
    color: white;
    border-radius: 50%;
    padding: 0.2rem 0.5rem;
    font-size: 0.8rem;
    margin-left: 0.5rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 6rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInDown 1s;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--text-dark);
    padding: 1rem 3rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: bold;
    font-size: 1.2rem;
    transition: transform 0.3s, box-shadow 0.3s;
    animation: pulse 2s infinite;
}

.cta-button:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-hover);
}

/* Winners Section */
.winners {
    background-color: var(--bg-light);
    padding: 2rem 0;
    overflow: hidden;
}

.winners h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.winners-scroll {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    padding: 1rem 0;
    scrollbar-width: none;
}

.winners-scroll::-webkit-scrollbar {
    display: none;
}

.winner-item {
    background-color: var(--white);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    display: flex;
    gap: 1rem;
    align-items: center;
    min-width: 300px;
    box-shadow: var(--shadow);
    animation: slideIn 0.5s;
}

.winner-name {
    font-weight: bold;
    color: var(--primary-color);
}

.winner-product {
    color: var(--text-light);
}

.winner-time {
    color: var(--accent-color);
    font-size: 0.9rem;
}

/* Categories Section */
.categories {
    padding: 4rem 0;
}

.categories h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 2px solid var(--bg-light);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--secondary-color);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.category-card h4 {
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* E-books Section */
.ebooks {
    background-color: var(--bg-light);
    padding: 4rem 0;
}

.ebooks h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.ebooks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.ebook-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.ebook-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.ebook-image {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.ebook-content {
    padding: 1.5rem;
}

.ebook-category {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--text-dark);
    padding: 0.3rem 0.8rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.ebook-title {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.ebook-description {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

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

.ebook-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.add-to-cart-btn {
    background-color: var(--secondary-color);
    color: var(--white);
    border: none;
    padding: 0.7rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.add-to-cart-btn:hover {
    background-color: var(--primary-color);
    transform: scale(1.05);
}

/* About Section */
.about {
    padding: 4rem 0;
    text-align: center;
}

.about h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.about > p {
    max-width: 800px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
    color: var(--text-light);
}

.benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.benefit-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.benefit-icon {
    font-size: 2.5rem;
}

.benefit-item p {
    color: var(--text-dark);
    font-weight: 500;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 3rem 0 2rem;
    text-align: center;
}

.footer-company-info {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    text-align: left;
}

.footer-company-info h4 {
    color: var(--accent-color);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    text-align: center;
}

.footer-company-info p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-company-info strong {
    color: var(--accent-color);
}

.footer-divider {
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.3), transparent);
    margin: 2rem 0;
}

.footer-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-top: 1rem;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--accent-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s;
}

.modal-content {
    background-color: var(--white);
    margin: 10% auto;
    padding: 2rem;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 600px;
    position: relative;
    animation: slideDown 0.3s;
}

.close {
    position: absolute;
    right: 1.5rem;
    top: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-light);
}

.close:hover {
    color: var(--text-dark);
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--bg-light);
}

.cart-total {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 2px solid var(--primary-color);
    text-align: right;
    font-size: 1.3rem;
}

.checkout-btn {
    width: 100%;
    background-color: var(--accent-color);
    color: var(--text-dark);
    border: none;
    padding: 1rem;
    border-radius: var(--border-radius);
    font-weight: bold;
    font-size: 1.1rem;
    cursor: pointer;
    margin-top: 1rem;
    transition: transform 0.2s;
}

.checkout-btn:hover {
    transform: scale(1.02);
}

.remove-item-btn {
    background-color: #ff4444;
    color: white;
    border: none;
    padding: 0.3rem 0.8rem;
    border-radius: 0.3rem;
    cursor: pointer;
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from {
        transform: translateX(-20px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
        flex-wrap: wrap;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

@media (max-width: 480px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .hero {
        padding: 3rem 0;
    }

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