:root {
    --bg-primary: #1e1e1e;
    --bg-secondary: #252526;
    --bg-tertiary: #2d2d30;
    --bg-elevated: #323233;
    --text-primary: #cccccc;
    --text-secondary: #858585;
    --text-bright: #ffffff;
    --accent-primary: #007acc;
    --accent-hover: #0098ff;
    --border-color: #3e3e42;
    --success: #4ec9b0;
    --warning: #ce9178;
    --keyword: #569cd6;
    --function: #dcdcaa;
    --string: #ce9178;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navbar */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
}

.nav-brand {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-bright);
    letter-spacing: -0.5px;
}

.logo-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 8px 16px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-block;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--accent-primary);
    color: var(--text-bright);
}

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

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    color: var(--text-bright);
}

.btn-large {
    padding: 12px 24px;
    font-size: 16px;
}

/* Hero */
.hero {
    padding: 120px 0 80px;
    position: relative;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 700;
    color: var(--text-bright);
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.5;
}

.hero-cta {
    display: flex;
    gap: 16px;
}

/* Code Window */
.code-window {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.window-header {
    background: var(--bg-tertiary);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}

.window-dots {
    display: flex;
    gap: 8px;
}

.window-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
}

.window-dots span:nth-child(1) {
    background: #ff5f56;
}

.window-dots span:nth-child(2) {
    background: #ffbd2e;
}

.window-dots span:nth-child(3) {
    background: #27c93f;
}

.window-title {
    color: var(--text-secondary);
    font-size: 13px;
}

.window-content {
    padding: 24px;
}

.window-content pre {
    margin: 0;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
}

.window-content code {
    color: var(--text-primary);
}

.keyword {
    color: var(--keyword);
}

.function {
    color: var(--function);
}

.string {
    color: var(--string);
}

/* Features */
.features {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.features h2 {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-bright);
    text-align: center;
    margin-bottom: 64px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 32px;
    transition: all 0.3s;
}

.feature-card:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.feature-card h3 {
    font-size: 20px;
    color: var(--text-bright);
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* Security */
.security {
    padding: 80px 0;
}

.security h2 {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-bright);
    text-align: center;
    margin-bottom: 64px;
}

.security-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.security-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s;
}

.security-item:hover {
    background: var(--bg-elevated);
    border-color: var(--success);
    transform: translateY(-4px);
}

.security-item svg {
    color: var(--success);
    margin-bottom: 20px;
}

.security-item h4 {
    font-size: 18px;
    color: var(--text-bright);
    margin-bottom: 12px;
}

.security-item p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* CTA */
.cta {
    padding: 80px 0;
    background: var(--bg-secondary);
    text-align: center;
}

.cta h2 {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 16px;
}

.cta p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Footer */
.footer {
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    padding: 48px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 64px;
    margin-bottom: 32px;
}

.footer-brand .logo {
    font-size: 20px;
    margin-bottom: 8px;
    display: block;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 64px;
}

.footer-column h4 {
    color: var(--text-bright);
    font-size: 14px;
    margin-bottom: 16px;
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 12px;
    transition: color 0.2s;
}

.footer-column a:hover {
    color: var(--text-bright);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .hero-content h1 {
        font-size: 42px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .security-features {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

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

    .mobile-menu-toggle {
        display: flex;
    }

    .hero {
        padding: 80px 0 60px;
    }

    .hero-content h1 {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta a {
        width: 100%;
        text-align: center;
    }

    .features h2,
    .security h2,
    .cta h2 {
        font-size: 32px;
    }

    .features-grid,
    .security-features {
        grid-template-columns: 1fr;
    }

    .features,
    .security,
    .cta {
        padding: 60px 0;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .cta-buttons a {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-content h1 {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .window-content {
        padding: 16px;
    }

    .window-content pre {
        font-size: 12px;
    }

    .feature-card,
    .security-item {
        padding: 24px;
    }
}