* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --light: #f1f5f9;
    --white: #ffffff;
    --success: #10b981;
    --border: #334155;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.navbar {
    background: var(--dark-light);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border);
}

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

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.nav-links a {
    color: var(--light);
    text-decoration: none;
    transition: color 0.3s;
}

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

.btn-primary {
    background: var(--primary);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: background 0.3s;
}

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

.btn-secondary {
    background: transparent;
    color: var(--light);
    padding: 0.5rem 1.5rem;
    border-radius: 0.5rem;
    border: 2px solid var(--border);
    cursor: pointer;
    transition: all 0.3s;
}

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    text-decoration: none;
    display: inline-block;
}

.hero {
    padding: 6rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--gray);
    margin-bottom: 2rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.hero-features {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.feature-badge {
    background: var(--dark-light);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    border: 1px solid var(--border);
}

.features {
    padding: 4rem 0;
    background: var(--dark-light);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--dark);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    transition: transform 0.3s, border-color 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    color: var(--white);
}

.pricing {
    padding: 4rem 0;
}

.pricing h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--gray);
    margin-bottom: 2rem;
}

.pricing-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.tab-btn {
    background: var(--dark-light);
    color: var(--light);
    padding: 0.75rem 2rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.pricing-content {
    display: none;
}

.pricing-content.active {
    display: block;
}

.pricing-content h3 {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--white);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.pricing-card {
    background: var(--dark-light);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    position: relative;
    transition: transform 0.3s, border-color 0.3s;
}

.pricing-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.pricing-card.featured {
    border-color: var(--primary);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.3);
}

.pricing-card .badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--primary);
    color: var(--white);
    padding: 0.25rem 1rem;
    border-radius: 1rem;
    font-size: 0.85rem;
}

.plan-name {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--white);
}

.plan-price {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.plan-price span {
    font-size: 1rem;
    color: var(--gray);
}

.plan-features {
    margin-bottom: 2rem;
}

.plan-features .feature {
    padding: 0.5rem 0;
    color: var(--light);
}

.btn-plan {
    width: 100%;
    background: var(--primary);
    color: var(--white);
    padding: 0.75rem;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s;
}

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

.docs {
    padding: 4rem 0;
    background: var(--dark-light);
}

.docs h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.doc-card {
    background: var(--dark);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
}

.doc-card h3 {
    color: var(--primary);
    margin-bottom: 1rem;
}

.code-example {
    background: var(--dark);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
}

.code-example h3 {
    margin-bottom: 1rem;
    color: var(--white);
}

.code-example pre {
    background: #000;
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
}

.code-example code {
    color: var(--success);
    font-family: 'Courier New', monospace;
}

.footer {
    background: var(--dark-light);
    padding: 3rem 0 1rem;
    border-top: 1px solid var(--border);
}

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

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

.footer-section a {
    display: block;
    color: var(--gray);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--gray);
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
}

.modal-content {
    background: var(--dark-light);
    margin: 5% auto;
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 1rem;
    width: 90%;
    max-width: 500px;
    position: relative;
}

.close {
    color: var(--gray);
    float: right;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
}

.close:hover {
    color: var(--white);
}

.auth-form {
    margin-top: 2rem;
}

.auth-form h2 {
    margin-bottom: 1.5rem;
    color: var(--white);
}

.auth-form input {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--white);
    font-size: 1rem;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--primary);
}

.auth-form button {
    width: 100%;
    padding: 0.75rem;
    margin-top: 0.5rem;
}

.form-switch {
    text-align: center;
    margin-top: 1rem;
    color: var(--gray);
}

.form-switch a {
    color: var(--primary);
    text-decoration: none;
}

.form-switch a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}