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

:root {
    --primary-color: #09f;
    --bg-primary: #0f0f0f;
    --bg-secondary: rgba(255, 255, 255, 0.05);
    --bg-card: rgba(255, 255, 255, 0.03);
    --border-color: rgba(255, 255, 255, 0.15);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --text-primary: rgba(255, 255, 255, 0.95);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --blur-bg: rgba(15, 15, 15, 0.8);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 35px;
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Navigation */
.navbar {
    background: var(--blur-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 1.2rem 0;
    border-bottom: 1px solid var(--border-subtle);
}

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

.nav-brand {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    font-size: 0.95rem;
    font-weight: 500;
}

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

/* Hero Section */
.hero {
    padding: 140px 0 100px;
    background: var(--bg-primary);
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 800px;
    height: 400px;
    background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
    opacity: 0.1;
    filter: blur(100px);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.tagline {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 400;
}

.subtitle {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    font-size: 1rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.btn {
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-block;
    font-size: 0.95rem;
}

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

.btn-primary:hover {
    background: #0088ee;
    transform: translateY(-1px);
    box-shadow: 0 10px 30px rgba(0, 153, 255, 0.3);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-color);
}

.hero-note {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.app-screenshot {
    width: 115%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-subtle);
    margin-left: -7.5%;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: var(--bg-primary);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--border-subtle);
}

.features h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 4rem;
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
    position: relative;
    z-index: 1;
}

.feature-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    transition: all 0.3s;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    filter: grayscale(100%) brightness(0.7);
}

.feature-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 1.1rem;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Demo Section */
.demo {
    padding: 100px 0;
    background: var(--bg-primary);
}

.demo h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.demo-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: start;
    margin-top: 4rem;
}

.video-placeholder {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 3rem;
    text-align: center;
    border: 1px solid var(--border-subtle);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.demo-note {
    color: var(--text-muted);
    margin-top: 1rem;
    font-size: 0.9rem;
}

.demo-steps h3 {
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.2rem;
}

.step {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.step-number {
    background: var(--primary-color);
    color: white;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
    font-size: 0.95rem;
}

.step-content h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Downloads Section */
.downloads {
    padding: 100px 0;
    background: var(--bg-primary);
    position: relative;
}

.downloads::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--border-subtle);
}

.downloads h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 4rem;
}

.download-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border-subtle);
    transition: all 0.3s;
}

.download-card:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color);
}

.os-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    filter: grayscale(100%) brightness(0.8);
}

.download-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 1.2rem;
}

.os-requirements {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 2rem;
}

.btn-download {
    background: var(--primary-color);
    color: white;
    padding: 12px 30px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 500;
    display: inline-block;
    transition: all 0.2s;
    font-size: 0.95rem;
}

.btn-download:hover {
    transform: translateY(-1px);
    background: #0088ee;
    box-shadow: 0 10px 30px rgba(0, 153, 255, 0.3);
}

.download-size {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 1rem;
}

.download-extras {
    text-align: center;
    margin-top: 4rem;
    color: var(--text-secondary);
}

.download-extras a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

.download-extras a:hover {
    color: #0088ee;
}

/* Changelog Page */
.changelog-page {
    padding: 120px 0 100px;
    background: var(--bg-primary);
    min-height: calc(100vh - 200px);
}

.changelog-page h1 {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.page-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 4rem;
    font-size: 1.1rem;
}

.nav-menu a.active {
    color: var(--primary-color);
}

.changelog-content {
    max-width: 800px;
    margin: 0 auto;
    margin-top: 4rem;
}

.changelog-entry {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: all 0.3s;
}

.changelog-entry:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color);
}

.changelog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

.changelog-version {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.changelog-date {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.changelog-body h4 {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.changelog-body h4:first-child {
    margin-top: 0;
}

.changelog-body ul {
    list-style: none;
    padding-left: 0;
}

.changelog-body li {
    color: var(--text-secondary);
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    line-height: 1.6;
}

.changelog-body li::before {
    content: '•';
    position: absolute;
    left: 0.5rem;
    color: var(--text-muted);
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--bg-primary) 0%, rgba(9, 150, 255, 0.02) 100%);
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.contact .section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 4rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    transition: all 0.3s;
}

.contact-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--border-color);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.contact-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.contact-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.contact-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: opacity 0.2s;
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--primary-color);
    border-radius: var(--radius-sm);
}

.contact-link:hover {
    opacity: 0.8;
    background: rgba(9, 150, 255, 0.1);
}

.contact-cta {
    text-align: center;
    padding-top: 2rem;
}

.contact-cta p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Footer */
.footer {
    padding: 50px 0;
    background: var(--bg-primary);
    text-align: center;
    border-top: 1px solid var(--border-subtle);
}

.footer p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 3rem;
    justify-content: center;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    font-size: 0.9rem;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .tagline {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .demo-content {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .download-cards {
        grid-template-columns: 1fr;
    }
    
    .nav-menu {
        gap: 1.5rem;
        font-size: 0.9rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-card {
        padding: 2rem 1.5rem;
    }
    
    .contact h2 {
        font-size: 2rem;
    }
}