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

:root {
    --primary-blue: #0071e3;
    --dark-blue: #0055b3;
    --black: #1d1d1f;
    --gray-dark: #424245;
    --gray-medium: #86868b;
    --gray-light: #f5f5f7;
    --white: #ffffff;
    --spacing-xs: 2rem;
    --spacing-sm: 4rem;
    --spacing-md: 8rem;
    --spacing-lg: 12rem;
    --spacing-xl: 16rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.8;
    color: var(--black);
    background-color: var(--white);
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 3rem;
}

/* Header & Navigation */
header {
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--black);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 3rem;
}

.nav-links a {
    color: var(--black);
    text-decoration: none;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: opacity 0.3s ease;
}

.nav-links a:hover {
    opacity: 0.7;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-lg) 0;
    background: var(--white);
}

.hero h1 {
    font-size: 2rem;
    font-weight: 400;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 0.875rem;
    color: var(--gray-medium);
    font-weight: 400;
    letter-spacing: 0.05em;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 2px;
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

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

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

.btn-outline {
    background-color: transparent;
    color: var(--black);
    border: 1px solid var(--black);
}

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

/* Features Section */
.features {
    padding: var(--spacing-lg) 0;
    background-color: var(--white);
    border-top: 1px solid var(--gray-light);
}

.features h2 {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    color: var(--black);
    letter-spacing: 0.05em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 4rem;
    max-width: 900px;
    margin: 0 auto;
}

.feature-card {
    text-align: left;
    padding: 0;
}

.feature-card h3 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--black);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.feature-card p {
    color: var(--gray-medium);
    font-size: 0.875rem;
    line-height: 1.8;
}

/* Pricing Section */
.pricing {
    padding: var(--spacing-lg) 0;
    background-color: var(--white);
    border-top: 1px solid var(--gray-light);
}

.pricing h2 {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    color: var(--black);
    letter-spacing: 0.05em;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 6rem;
    max-width: 800px;
    margin: 0 auto;
}

.pricing-card {
    background-color: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: 0;
    padding: 3rem 2rem;
    position: relative;
    transition: border-color 0.2s ease;
}

.pricing-card:hover {
    border-color: var(--black);
}

.pricing-header {
    text-align: left;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--gray-light);
}

.pricing-header h3 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--black);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.price {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.amount {
    font-size: 2rem;
    font-weight: 300;
    color: var(--black);
    line-height: 1.2;
}

.period {
    font-size: 0.75rem;
    color: var(--gray-medium);
    letter-spacing: 0.05em;
    line-height: 1.4;
}

.features-list {
    list-style: none;
    margin-bottom: 3rem;
}

.features-list li {
    padding: 0.875rem 0;
    color: var(--gray-dark);
    font-size: 0.875rem;
    line-height: 1.6;
}

.pricing-card .btn {
    width: 100%;
    text-align: center;
}

/* Contact Section */
.contact {
    padding: var(--spacing-lg) 0;
    background-color: var(--white);
    border-top: 1px solid var(--gray-light);
}

.contact h2 {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    color: var(--black);
    letter-spacing: 0.05em;
}

.contact-form {
    max-width: 500px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 2rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 0;
    border: none;
    border-bottom: 1px solid var(--gray-light);
    border-radius: 0;
    font-size: 0.875rem;
    font-family: inherit;
    transition: border-color 0.2s ease;
    background-color: transparent;
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-medium);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.contact-form .btn {
    width: 100%;
}

/* Footer */
footer {
    background-color: var(--white);
    padding: var(--spacing-md) 0 var(--spacing-sm);
    border-top: 1px solid var(--gray-light);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-section h4 {
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--black);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-section p {
    color: var(--gray-medium);
    font-size: 0.875rem;
    line-height: 1.8;
}

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

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section a {
    color: var(--gray-medium);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 3rem;
    border-top: 1px solid var(--gray-light);
    color: var(--gray-medium);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-xs: 1.5rem;
        --spacing-sm: 3rem;
        --spacing-md: 6rem;
        --spacing-lg: 8rem;
        --spacing-xl: 10rem;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 0.8rem;
    }

    .nav-links {
        gap: 1.5rem;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 4rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .container {
        padding: 0 1.5rem;
    }

    .feature-card {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.25rem;
    }

    .nav-links {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }
}