:root {
    --primary-color: #4A90E2;
    --secondary-color: #2C3E50;
    --accent-color: #E74C3C;
    --text-color: #333333;
    --light-gray: #F5F5F5;
    --white: #FFFFFF;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Navigation */
header {
    background-color: var(--white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    margin-left: 2rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text {
    max-width: 500px;
}

.hero h1 {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-weight: 700;
}

.hero .subtitle {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.hero .feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
    color: var(--text-color);
}

.hero .feature i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.hero-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.hero-image:hover img {
    transform: scale(1.02);
}

.hero .cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-text {
        max-width: 600px;
        margin: 0 auto;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-features {
        align-items: center;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 3rem 0;
    }

    .hero-content {
        padding: 0 1rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero .subtitle {
        font-size: 1.1rem;
    }

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

/* Price Container */
.price-container {
    margin: 2rem 0;
}

.original-price {
    text-decoration: line-through;
    font-size: 1.5rem;
    margin-right: 1rem;
}

.current-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.discount {
    background-color: var(--accent-color);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    margin-left: 1rem;
    font-weight: 600;
}

/* Problems Section */
.problems {
    background-color: var(--light-gray);
    padding: 4rem 0;
}

.problems h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--secondary-color);
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.problem-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.problem-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.problem-card h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

/* Why Cream Section */
.why-cream {
    padding: 4rem 0;
}

.why-cream h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--secondary-color);
}

.why-cream-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.why-cream-item {
    background-color: var(--light-gray);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
}

.why-cream-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.why-cream-item h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

/* Benefits Section */
.benefits {
    background-color: var(--light-gray);
    padding: 4rem 0;
}

.benefits h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--secondary-color);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.benefit {
    text-align: center;
    padding: 2rem;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.benefit h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

/* Reviews Section */
.reviews {
    padding: 4rem 0;
}

.reviews h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--secondary-color);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.review-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.reviewer-info {
    display: flex;
    align-items: center;
}

.reviewer-image {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-right: 1rem;
}

.reviewer-details h4 {
    margin-bottom: 0.5rem;
}

.stars {
    color: #FFD700;
}

.review-date {
    color: #666;
    font-size: 0.9rem;
}

.review-text {
    margin-bottom: 1rem;
    font-style: italic;
}

.review-verified {
    display: flex;
    align-items: center;
    color: #27AE60;
}

.review-verified i {
    margin-right: 0.5rem;
}

/* Sections */
section {
    padding: 4rem 2rem;
}

section h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--secondary-color);
}

/* About Section */
.about {
    background-color: var(--light-gray);
}

.about p {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

/* Ingredients Section */
.ingredients ul {
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.ingredients li {
    padding: 1rem;
    background-color: var(--light-gray);
    border-radius: 8px;
    text-align: center;
}

/* Usage Section */
.usage-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    text-align: center;
    padding: 2rem;
    background-color: var(--light-gray);
    border-radius: 8px;
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-weight: 600;
}

/* Order Section */
.order {
    background-color: var(--light-gray);
}

.order-container {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
}

.product-info {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 100px;
}

.product-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #eee;
}

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

.product-badge {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.product-details {
    margin-bottom: 2rem;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid #eee;
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-label {
    color: var(--text-color);
    font-weight: 500;
    display: flex;
    align-items: center;
}

.detail-label i,
.price-row span i {
    margin-right: 0.5rem;
    color: var(--primary-color);
    width: 16px;
    text-align: center;
}

.detail-value {
    color: var(--secondary-color);
    font-weight: 600;
}

.price-summary {
    background-color: var(--light-gray);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--text-color);
    gap: 1rem;
}

.price-row span {
    display: flex;
    align-items: center;
    white-space: nowrap;
    gap: 0.5rem;
}

.price-row span:first-child {
    color: #666;
    flex: 1;
}

.price-row span:last-child {
    font-weight: 500;
    min-width: 100px;
    justify-content: flex-end;
    text-align: right;
}

.price-row .original-price {
    text-decoration: line-through;
    color: #666;
    white-space: nowrap;
    text-align: right;
    min-width: 80px;
}

.price-row .discount {
    color: var(--accent-color);
    font-weight: 600;
    background-color: #fff5f5;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    min-width: 80px;
    text-align: center;
}

.price-row .current-price {
    color: var(--accent-color);
    font-size: 1.5rem;
    white-space: nowrap;
    font-weight: 700;
    text-align: right;
    min-width: 80px;
}

.price-row.total {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 2px solid #ddd;
    font-weight: 600;
    font-size: 1.2rem;
    margin-bottom: 0;
}

.price-row.total span:last-child {
    min-width: 100px;
    font-size: 1.5rem;
}

.product-features {
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #eee;
}

.product-features .feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.5rem;
    color: var(--text-color);
}

.product-features .feature i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.product-features .feature span {
    font-size: 0.9rem;
    font-weight: 500;
}

.order-form {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-top: 0.25rem;
}

.checkbox-group label {
    margin-bottom: 0;
    font-size: 0.9rem;
    line-height: 1.4;
}

/* CTA Button */
.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.2);
}

.order-form .cta-button {
    margin-top: 1rem;
    padding: 1.2rem 3rem;
    font-size: 1.2rem;
    align-self: center;
    min-width: 280px;
    background: linear-gradient(135deg, var(--accent-color) 0%, #c0392b 100%);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.order-form .cta-button i {
    transition: transform 0.3s ease;
}

.order-form .cta-button:hover i {
    transform: translateX(4px);
}

.order-form .cta-button:hover {
    background: linear-gradient(135deg, #c0392b 0%, var(--accent-color) 100%);
    box-shadow: 0 6px 15px rgba(231, 76, 60, 0.3);
    transform: translateY(-2px);
}

.order-form .cta-button:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(231, 76, 60, 0.3);
}

/* Footer */
footer {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 3rem 2rem 1rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Form Validation Styles */
.form-group input:invalid,
.form-group textarea:invalid,
.form-group select:invalid {
    border-color: #ff4444;
}

.form-group input:valid,
.form-group textarea:valid,
.form-group select:valid {
    border-color: #00C851;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero .subtitle {
        font-size: 1.2rem;
    }

    .feature {
        justify-content: center;
    }

    .hero-image {
        max-width: 500px;
        margin: 0 auto;
    }

    .order-container {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .problems-grid,
    .why-cream-grid,
    .benefits-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
    }

    .product-info {
        position: static;
        margin-bottom: 2rem;
    }

    .order-form {
        padding: 1.5rem;
    }

    .product-features {
        flex-direction: column;
        gap: 1.5rem;
    }

    .trust-signals {
        flex-direction: column;
        gap: 1rem;
    }
    
    .trust-item {
        justify-content: center;
    }
}

/* Bundles Section */
.bundles {
    background-color: var(--light-gray);
    padding: 4rem 0;
}

.bundles h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--secondary-color);
}

.bundles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.bundle-card {
    background-color: var(--white);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
    position: relative;
    cursor: pointer;
    outline: none;
}

.bundle-card:hover,
.bundle-card:focus {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.bundle-card:focus-visible {
    box-shadow: 0 0 0 3px var(--primary-color);
}

.bundle-card.popular {
    border: 2px solid var(--accent-color);
}

.bundle-card.selected {
    border: 2px solid var(--accent-color);
    background-color: #fff5f5;
}

.bundle-card.selected .bundle-header {
    background: linear-gradient(135deg, #c0392b, #e74c3c);
}

.bundle-card.selected .bundle-content li i {
    color: var(--accent-color);
}

.bundle-card.selected .bundle-select-btn {
    background-color: #c0392b;
}

.bundle-card.selected .popular-badge {
    background-color: #c0392b;
}

.popular-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.bundle-header {
    padding: 2rem;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), #2980b9);
    color: var(--white);
}

.bundle-header h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.bundle-content {
    padding: 2rem;
}

.bundle-content ul {
    list-style: none;
}

.bundle-content li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.bundle-content li i {
    color: #4CAF50;
    font-size: 1.2rem;
}

.bundle-footer {
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid #eee;
}

.bundle-select-btn {
    background-color: var(--accent-color);
    color: var(--white);
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    width: 100%;
}

.bundle-select-btn:hover {
    background-color: #c0392b;
}

.bundle-details {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
}

.bundle-details h4 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.bundle-details p {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 1.2rem;
}

.product-info h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.product-info p {
    color: var(--text-color);
    margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
    .bundles-grid {
        grid-template-columns: 1fr;
        padding: 0 1rem;
    }
}

.social-proof-wrapper {
    margin: 2rem 0;
    text-align: center;
}

.trust-signals {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 500;
}

.trust-item i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.guarantee-text {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 500;
}

.guarantee-text i {
    color: #27AE60;
}