:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-color: #1f2937;
    --light-text: #6b7280;
    --background: #f8fafc;
    --card-bg: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background);
    color: var(--text-color);
    line-height: 1.6;
}

nav {
    background-color: var(--card-bg);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: var(--transition);
}

nav a:hover {
    color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.1);
}

section {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 1rem;
    box-shadow: var(--shadow);
}

h2 {
    color: var(--text-color);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

p {
    color: var(--light-text);
    margin-bottom: 1rem;
}

.slider {
    width: 100%;
    height: 500px;
    border-radius: 1rem;
    overflow: hidden;
    position: relative;
    margin-bottom: 2rem;
}

.slider img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}

.slider img.active {
    opacity: 1;
}

/* Slider Navigation Dots */
.slider-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    background-color: white;
    transform: scale(1.2);
}

.slider-dot:hover {
    background-color: white;
    transform: scale(1.2);
}

/* Responsive Design */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        gap: 1rem;
    }
    
    section {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .slider {
        height: 300px;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

/* Hero Section */
#hero {
    position: relative;
    padding: 0;
    margin: 0;
    max-width: 100%;
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 2;
    width: 80%;
    max-width: 800px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: var(--transition);
}

.cta-button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 1rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

/* Testimonials Section */
.testimonial-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    max-width: 800px;
    margin: 0 auto;
}

.testimonial-card p {
    font-size: 1.25rem;
    font-style: italic;
    margin-bottom: 1rem;
}

.testimonial-card cite {
    color: var(--light-text);
    font-style: normal;
}

/* Footer */
footer {
    background-color: var(--card-bg);
    padding: 2rem;
    margin-top: 4rem;
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary-color);
}

/* Responsive Design Updates */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* Products Section */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 1rem;
}

.product-card {
    background-color: var(--card-bg);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.product-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-content h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

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

.product-features {
    margin: 1rem 0;
}

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

.product-features li {
    padding: 0.5rem 0;
    color: var(--text-color);
    font-size: 0.9rem;
    position: relative;
    padding-left: 1.5rem;
}

.product-features li::before {
    content: "✓";
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.product-actions {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-top: auto;
}

.readmore-link {
    margin-bottom: 2.5rem;
    color: var(--primary-color);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: color 0.2s;
}

.readmore-link:hover {
    color: var(--secondary-color);
}

.product-buttons {
    display: flex;
    gap: 1rem;
    width: 100%;
    flex-wrap: nowrap;
    justify-content: flex-start;
}

.download-btn, .review-btn {
    flex: 1;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    min-width: 120px;
    white-space: nowrap;
}

.download-btn {
    background-color: var(--primary-color);
    color: white;
}

.download-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

.review-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
}

.review-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

/* Responsive Design for Products */
@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-actions {
        flex-direction: column;
    }
    
    .download-btn, .review-btn {
        width: 100%;
    }
}

/* Product Rating Styles */
.product-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.stars {
    display: flex;
    gap: 0.1rem;
}

.star {
    color: #e0e0e0;
    font-size: 1.1rem;
    position: relative;
    transition: color 0.2s ease;
}

.star.full {
    color: #ffd700;
}

.star.half {
    color: #e0e0e0;
}

.star.half::after {
    content: "★";
    position: absolute;
    left: 0;
    width: 50%;
    overflow: hidden;
    color: #ffd700;
}

.star.empty {
    color: #e0e0e0;
}

.rating-value {
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
}

.review-count {
    color: var(--light-text);
    font-size: 0.9rem;
}

/* Update product content spacing */
.product-content h3 {
    margin-bottom: 0.5rem;
}

.product-description {
    margin-top: 0.5rem;
}

/* Review Form Styles */
.review-form {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 1rem;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Error States */
.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: #ef4444;
}

.form-group.error input:focus,
.form-group.error select:focus,
.form-group.error textarea:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.error-message {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* Rating Input Styles */
.rating-input {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.rating-star {
    font-size: 1.5rem;
    color: #e0e0e0;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.rating-star:hover,
.rating-star.active {
    color: #ffd700;
    transform: scale(1.1);
}

.rating-star:hover ~ .rating-star {
    color: #e0e0e0;
}

/* Submit Button Styles */
.submit-btn {
    width: 100%;
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

.submit-btn:disabled {
    background-color: #94a3b8;
    cursor: not-allowed;
    transform: none;
}

/* Success Message Styles */
.success-message {
    margin-top: 2rem;
    padding: 1rem;
    background-color: #10b981;
    color: white;
    border-radius: 0.5rem;
    text-align: center;
    animation: fadeIn 0.5s ease-in;
}

/* Responsive Design for Review Form */
@media (max-width: 768px) {
    .review-form {
        padding: 1.5rem;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 0.95rem;
    }
    
    .rating-star {
        font-size: 1.25rem;
    }
}

/* Modal Styles */
.modal {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.25);
    animation: fadeIn 0.3s;
}

.modal-content {
    background: var(--card-bg);
    padding: 2rem 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
    min-width: 320px;
    max-width: 90vw;
    animation: fadeIn 0.4s;
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 2rem;
    color: var(--light-text);
    cursor: pointer;
    transition: color 0.2s;
}
.close-modal:hover {
    color: var(--primary-color);
}

#submittedReviewDetails {
    margin-top: 1.5rem;
    text-align: left;
}

/* Reviews List Styles */
#reviewsListSection {
    max-width: 600px;
    margin: 2rem auto 0 auto;
    background: var(--card-bg);
    border-radius: 1rem;
    box-shadow: var(--shadow);
    padding: 2rem;
}

.review-item {
    border-bottom: 1px solid #e5e7eb;
    padding: 1.25rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.review-item:last-child {
    border-bottom: none;
}
.review-header {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.review-user {
    font-weight: 600;
    color: var(--primary-color);
}
.review-date {
    color: var(--light-text);
    font-size: 0.9rem;
}
.review-stars {
    display: flex;
    gap: 0.1rem;
    font-size: 1.1rem;
}
.review-comment {
    color: var(--text-color);
    font-size: 1rem;
    margin-top: 0.25rem;
}

@media (max-width: 768px) {
    .modal-content {
        padding: 1.25rem 0.5rem;
        min-width: 220px;
    }
    #reviewsListSection {
        padding: 1.25rem;
    }
}

@media (max-width: 500px) {
    .product-buttons {
        flex-direction: column;
        gap: 0.5rem;
    }
}