/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-foreground: #2c3e50;
    --color-muted: #6b7280;
    --color-background: #ffffff;
    --color-secondary-bg: #f8f9fa;
    --color-border: #e5e7eb;
    --max-width: 1200px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    color: var(--color-primary);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-foreground);
}

.nav-links {
    display: none;
    gap: var(--spacing-xl);
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-muted);
    text-decoration: none;
    transition: color 0.2s;
}

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

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
}

/* Hero Section */
.hero-section {
    padding: var(--spacing-3xl) 0;
}

.hero-grid {
    display: grid;
    gap: var(--spacing-2xl);
    align-items: center;
}

@media (min-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.hero-title {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-foreground);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3rem;
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-muted);
    line-height: 1.5;
}

.hero-description {
    font-size: 1rem;
    color: var(--color-muted);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.btn-primary {
    display: inline-block;
    background-color: var(--color-primary);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background-color 0.2s;
    width: fit-content;
    text-decoration: none;
    text-align: center;
}

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

.disclaimer-small {
    font-size: 0.75rem;
    color: var(--color-muted);
    line-height: 1.5;
    max-width: 32rem;
}

.hero-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image {
    width: 100%;
    max-width: 500px;
    height: auto;
}

/* Packages Section */
.packages-section {
    background-color: var(--color-secondary-bg);
    padding: var(--spacing-3xl) 0;
}

.packages-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.free-shipping-banner {
    font-size: 0.95rem;
    color: var(--color-muted);
    margin-top: var(--spacing-md);
}

.free-shipping-banner strong {
    color: #dc2626;
}

.packages-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
    max-width: 960px;
    margin: 0 auto;
    align-items: start;
}

@media (min-width: 768px) {
    .packages-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.package-card {
    background-color: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: 0.75rem;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: box-shadow 0.2s;
}

.package-card:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.package-featured {
    border-color: #dc2626;
    box-shadow: 0 4px 20px rgba(220, 38, 38, 0.12);
}

.package-featured:hover {
    box-shadow: 0 6px 28px rgba(220, 38, 38, 0.18);
}

.package-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    border-radius: 0 0 0.5rem 0.5rem;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
}

.badge-dark {
    background-color: #1f2937;
    color: #ffffff;
}

.badge-red {
    background-color: #dc2626;
    color: #ffffff;
}

.package-supply {
    font-size: 0.8rem;
    color: var(--color-foreground);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.02em;
}

.package-image-wrap {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.package-img {
    max-width: 160px;
    height: auto;
}

.package-img-large {
    max-width: 200px;
}

.package-price {
    font-size: 1rem;
    color: var(--color-foreground);
    margin-bottom: var(--spacing-sm);
}

.price-amount {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-foreground);
}

.price-red {
    color: #dc2626;
}

.package-perks {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-bottom: var(--spacing-lg);
}

.perk {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.perk-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
}

.perk-dot.green {
    background-color: #16a34a;
}

.btn-add-to-cart {
    display: block;
    width: 100%;
    padding: 0.85rem 1rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: opacity 0.2s;
    margin-bottom: var(--spacing-md);
    text-decoration: none;
    text-align: center;
    box-sizing: border-box;
}

.btn-add-to-cart:hover {
    opacity: 0.9;
}

.btn-dark {
    background-color: #1f2937;
    color: #ffffff;
}

.btn-red {
    background-color: #dc2626;
    color: #ffffff;
}

.package-total {
    font-size: 0.9rem;
    color: var(--color-foreground);
}

.price-original {
    text-decoration: line-through;
    color: var(--color-muted);
    font-size: 0.85rem;
}

.price-final {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-foreground);
}

.price-final-red {
    color: #dc2626;
}

.shipping-note {
    font-size: 0.75rem;
    color: var(--color-muted);
    margin-top: 0.15rem;
}

.shipping-free {
    font-size: 0.75rem;
    color: #16a34a;
    font-weight: 600;
    margin-top: 0.15rem;
}

/* About Section */
.about-section {
    background-color: var(--color-secondary-bg);
    padding: var(--spacing-3xl) 0;
}

.section-content-center {
    max-width: 48rem;
    margin: 0 auto;
    text-align: center;
}

.section-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--color-foreground);
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 1rem;
    color: var(--color-muted);
    line-height: 1.6;
}

/* Ingredients Section */
.ingredients-section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.ingredient-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .ingredient-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .ingredient-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.ingredient-note {
    font-size: 0.875rem;
    color: var(--color-muted);
    text-align: center;
    max-width: 42rem;
    margin: var(--spacing-xl) auto 0;
}

/* Card Styles */
.card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.card-header {
    padding: var(--spacing-lg) var(--spacing-lg) 0;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-foreground);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-description {
    font-size: 0.875rem;
    color: var(--color-muted);
    line-height: 1.6;
}

/* How To Use Section */
.how-to-use-section {
    background-color: var(--color-secondary-bg);
    padding: var(--spacing-3xl) 0;
}

.section-content-center-narrow {
    max-width: 42rem;
    margin: 0 auto;
}

.usage-text {
    font-size: 1rem;
    color: var(--color-foreground);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.usage-warning {
    font-size: 0.875rem;
    color: var(--color-muted);
    line-height: 1.6;
}

/* Quality Section */
.quality-section {
    padding: var(--spacing-3xl) 0;
}

.quality-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
    max-width: 56rem;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .quality-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .quality-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.quality-card-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-md);
}

.quality-icon {
    color: var(--color-primary);
}

.quality-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-foreground);
}

/* Guarantee Section */
.guarantee-section {
    background-color: var(--color-secondary-bg);
    padding: var(--spacing-3xl) 0;
}

/* FAQ Section */
.faq-section {
    padding: var(--spacing-3xl) 0;
}

.accordion {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.accordion-item {
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    overflow: hidden;
}

.accordion-trigger {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: transparent;
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-foreground);
    cursor: pointer;
    transition: background-color 0.2s;
}

.accordion-trigger:hover {
    background-color: var(--color-secondary-bg);
}

.accordion-icon {
    transition: transform 0.2s;
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.accordion-item.active .accordion-content {
    max-height: 500px;
}

.accordion-content p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-muted);
    line-height: 1.6;
}

/* Contact Section */
.contact-section {
    background-color: var(--color-secondary-bg);
    padding: var(--spacing-3xl) 0;
}

.contact-block {
    margin-bottom: var(--spacing-lg);
}

.contact-block:last-child {
    margin-bottom: 0;
}

.contact-border {
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-lg);
}

.contact-heading {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-foreground);
    margin-bottom: var(--spacing-sm);
}

.contact-details {
    font-size: 0.875rem;
    color: var(--color-muted);
}

.contact-details p {
    margin-bottom: var(--spacing-xs);
}

.company-name {
    font-weight: 500;
}

.email-link {
    color: var(--color-primary);
    text-decoration: none;
}

.email-link:hover {
    text-decoration: underline;
}

.business-hours {
    font-size: 0.75rem;
    margin-top: var(--spacing-sm);
}

/* Footer */
.footer {
    border-top: 1px solid var(--color-border);
    background-color: var(--color-background);
    padding: var(--spacing-2xl) 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-muted);
    text-decoration: none;
    transition: color 0.2s;
}

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

.footer-disclaimer {
    max-width: 48rem;
    text-align: center;
}

.footer-disclaimer p {
    font-size: 0.75rem;
    color: var(--color-muted);
    line-height: 1.6;
}

.footer-copyright {
    font-size: 0.875rem;
    color: var(--color-muted);
}