/* Modern CSS Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Variables */
:root {
    --primary-color: #0071e3;
    --secondary-color: #06c;
    --text-color: #1d1d1f;
    --background-light: #fbfbfd;
    --background-dark: #f5f5f7;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --border-radius: 12px;
    --max-width: 1200px;
}

/* Typography */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--background-light);
}

h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3.5rem;
    letter-spacing: -0.5px;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

/* Layout */
.header {
    background: rgba(255, 255, 255, 0.8);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 1rem;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-links {
    display: flex;
    gap: var(--spacing-sm);
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    padding: 0.5rem 1rem;
    transition: color 0.3s ease;
}

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

/* Buttons */
.primary-button, .cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.primary-button:hover, .cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 113, 227, 0.3);
}

/* Sections */
section {
    padding: var(--spacing-lg) var(--spacing-sm);
    margin: 0 auto;
    max-width: var(--max-width);
}

.hero {
    padding-top: calc(var(--spacing-lg) * 2);
    text-align: center;
    background: linear-gradient(180deg, var(--background-light) 0%, var(--background-dark) 100%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-sm);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.feature-card {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

/* Steps Container */
.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.step {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

/* FAQ Section */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

/* Footer */
.footer {
    background: var(--background-dark);
    padding: var(--spacing-lg) var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: var(--text-color);
    text-decoration: none;
    display: block;
    padding: 0.5rem 0;
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .nav-links {
        display: none;
    }

    .hero {
        padding-top: var(--spacing-lg);
    }

    section {
        padding: var(--spacing-md) var(--spacing-sm);
    }
}

/* Mobile Menu Button */
.mobile-menu-button {
    display: none;
}

@media (max-width: 768px) {
    .mobile-menu-button {
        display: block;
        font-size: 1.5rem;
        background: none;
        border: none;
        cursor: pointer;
    }
}

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

.hero, .features, .what-is, .how-to, .why-choose, .faq {
    animation: fadeIn 1s ease-out;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: var(--spacing-lg) var(--spacing-sm);
    margin-top: var(--spacing-lg);
    text-align: center;
    color: white;
}

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

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: white;
}

.cta-section p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.cta-section .primary-button {
    background: white;
    color: var(--primary-color);
    font-size: 1.25rem;
    padding: 1rem 3rem;
    margin-top: var(--spacing-md);
}

.cta-section .primary-button:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

/* Responsive Design for CTA Section */
@media (max-width: 768px) {
    .cta-section h2 {
        font-size: 2rem;
    }

    .cta-section p {
        font-size: 1.1rem;
    }

    .cta-section .primary-button {
        font-size: 1.1rem;
        padding: 0.8rem 2rem;
    }
}