/* CSS Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #0f172a;
    --accent-color: #3b82f6;
    --text-color: #334155;
    --text-light: #64748b;
    --bg-color: #ffffff;
    --bg-alt: #f8fafc;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --max-width: 1200px;
    --radius: 8px;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--secondary-color);
    line-height: 1.3;
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

/* Navigation */
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

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

.nav-links a {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: white;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #1e3a5f 100%);
    color: white;
    padding-bottom: 4rem;
}

.hero-content {
    text-align: center;
    padding: 4rem 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    color: white;
    margin-bottom: 1.5rem;
}

.hero-content p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.875rem 2rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1.1rem;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

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

/* Sections */
.section {
    padding: 4rem 0;
}

.section-alt {
    background-color: var(--bg-alt);
}

.section-intro {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 700px;
    margin-bottom: 2.5rem;
}

/* Benefits Grid */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.benefit-card {
    background: var(--bg-alt);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.benefit-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.benefit-card h3 {
    margin-bottom: 0.75rem;
}

.benefit-card p {
    color: var(--text-light);
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* Step by Step */
.step-by-step {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.step {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    margin-bottom: 0.75rem;
}

/* Product Callout */
.product-callout {
    background: white;
    border-left: 4px solid var(--primary-color);
    padding: 1rem 1.25rem;
    margin-top: 1rem;
    border-radius: 0 var(--radius) var(--radius) 0;
}

.product-callout p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

.section-alt .product-callout {
    background: var(--bg-color);
}

/* Two Column Layout */
.two-column {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.column h3 {
    margin-bottom: 1rem;
}

.feature-list {
    list-style: disc;
    padding-left: 1.25rem;
    margin-bottom: 1rem;
}

.feature-list li {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.tip {
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 1rem;
    border-radius: 0 var(--radius) var(--radius) 0;
    font-size: 0.95rem;
}

.floor-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

/* Sleeve Types */
.sleeve-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.sleeve-card {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.sleeve-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.product-card {
    background: var(--bg-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.product-category {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    align-self: flex-start;
}

.product-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.product-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    flex: 1;
}

.product-link {
    display: inline-block;
    background: var(--success-color);
    color: white;
    padding: 0.625rem 1rem;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 0.9rem;
    text-align: center;
    transition: background-color 0.2s ease;
}

.product-link:hover {
    background: #059669;
    color: white;
}

/* Tips Grid */
.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.tip-card {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.tip-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.tip-card p {
    margin-bottom: 0;
    color: var(--text-light);
    font-size: 0.95rem;
}

/* FAQ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.faq-item {
    background: var(--bg-alt);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.faq-item h3 {
    color: var(--secondary-color);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.faq-item p {
    margin-bottom: 0;
    color: var(--text-light);
}

/* Footer */
.footer {
    background: var(--secondary-color);
    color: rgba(255, 255, 255, 0.8);
    padding: 3rem 0 1.5rem;
}

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

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
}

.affiliate-disclosure {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.copyright {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 0;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-content {
        padding: 3rem 1rem;
    }

    .step {
        flex-direction: column;
        gap: 1rem;
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }

    .section {
        padding: 3rem 0;
    }

    .two-column {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .hero {
        background: none;
        color: black;
    }

    .hero-content h1,
    .hero-content p {
        color: black;
    }

    .nav-container,
    .cta-button,
    .product-link {
        display: none;
    }
}