/* CSS Variables for Design System */
:root {
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-gray-light: #F5F5F5;
    --color-gray-medium: #9CA3AF;
    --color-gray-dark: #374151;
    --color-accent: #000000;
    
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --max-width: 1200px;
    
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 96px;
}

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

body {
    font-family: var(--font-family);
    color: var(--color-black);
    line-height: 1.6;
    background: var(--color-white);
}

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

/* Typography */
h1 {
    font-size: 3rem;
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 2.5rem;
    line-height: 1.3;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.5rem;
    line-height: 1.4;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

p {
    font-size: 1.125rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-sm);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-light);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--color-gray-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--color-black);
}

.nav-link.active {
    color: var(--color-black);
    font-weight: 600;
}

.nav-cta {
    background: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.nav-cta:hover {
    opacity: 0.9;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--color-black);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1.125rem;
    font-weight: 600;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    text-decoration: none;
}

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

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-black);
    border: 2px solid var(--color-black);
}

.btn-secondary:hover {
    background: var(--color-gray-light);
}

/* Hero Section */
.hero {
    padding: calc(var(--spacing-xl) + 80px) 0 var(--spacing-xl) 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
}

.hero h1 {
    max-width: 900px;
    margin: 0 auto var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-lg);
}

.value-props {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.value-prop {
    text-align: center;
}

.value-prop h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.value-prop p {
    font-size: 1rem;
    color: var(--color-gray-medium);
}

/* How It Works Section */
.how-it-works {
    padding: var(--spacing-xl) 0;
    background: var(--color-gray-light);
}

.how-it-works h2,
.pricing h2,
.about h2 {
    text-align: center;
}

.section-subtitle {
    text-align: center;
    font-size: 1.25rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-xl);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.step {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-white);
    border-radius: 8px;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--color-black);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

/* Pricing Section */
.pricing {
    padding: var(--spacing-xl) 0;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.pricing-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-light);
    border-radius: 8px;
    padding: var(--spacing-lg);
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
    cursor: pointer;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.pricing-card.selected {
    border-color: var(--color-black);
    border-width: 3px;
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.get-in-touch-btn {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-black);
    color: var(--color-white);
    border-radius: 4px;
    font-weight: 600;
    transition: opacity 0.3s ease;
}

.get-in-touch-btn:hover {
    opacity: 0.9;
}

.badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-black);
    color: var(--color-white);
    padding: 4px 16px;
    font-size: 0.875rem;
    border-radius: 20px;
    font-weight: 600;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    margin: var(--spacing-md) 0;
}

.price span {
    font-size: 1.25rem;
    color: var(--color-gray-medium);
    font-weight: 400;
}

.features {
    list-style: none;
    margin: var(--spacing-md) 0;
    text-align: left;
}

.features li {
    padding: var(--spacing-xs) 0;
    color: var(--color-gray-dark);
    position: relative;
    padding-left: var(--spacing-md);
}

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

.trial-info {
    text-align: center;
    margin-top: var(--spacing-lg);
    font-style: italic;
    color: var(--color-gray-medium);
}

/* About Section */
.about {
    padding: var(--spacing-xl) 0;
    background: var(--color-gray-light);
}

.about-content {
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    text-align: center;
    font-size: 1.25rem;
    line-height: 1.8;
}

.contact {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.contact-email {
    font-size: 1.5rem;
    color: var(--color-black);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 2px solid var(--color-black);
    transition: opacity 0.3s ease;
}

.contact-email:hover {
    opacity: 0.7;
}

/* Footer */
.footer {
    background: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

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

.footer-links a {
    color: var(--color-white);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 1;
}

.copyright {
    text-align: center;
    opacity: 0.6;
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    /* Mobile Navigation */
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        justify-content: flex-start;
        align-items: flex-start;
        padding: calc(var(--spacing-xl) + 20px) var(--spacing-lg) var(--spacing-lg);
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        gap: var(--spacing-md);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-link,
    .nav-cta {
        display: block;
        width: 100%;
        padding: var(--spacing-sm);
        font-size: 1.125rem;
    }
    
    .nav-cta {
        text-align: center;
        margin-top: var(--spacing-md);
    }
    
    /* Overlay for mobile menu */
    .nav-menu.active::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.3);
        z-index: -1;
    }
    
    .hero {
        padding: calc(var(--spacing-xl) + 80px) 0 var(--spacing-xl) 0;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}