:root {
    --color-bg: #0a0a0a;
    --color-surface: #141414;
    --color-surface-elevated: #1a1a1a;
    --color-text-primary: #e8e8e8;
    --color-text-secondary: #b0b0b0;
    --color-accent: #4a9eff;
    --color-accent-hover: #6bb0ff;
    --color-border: #2a2a2a;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --max-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Header */
.header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background-color: rgba(20, 20, 20, 0.9);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: var(--spacing-xs) 0;
    position: relative;
}

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

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.nav a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 100%);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Sections */
.section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
    text-align: center;
}

.section-intro {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Why Section */
.why-section {
    background-color: var(--color-surface);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.feature-card {
    background-color: var(--color-surface-elevated);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-accent);
}

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

.audience-note {
    text-align: center;
    color: var(--color-text-secondary);
    font-style: italic;
    margin-top: var(--spacing-md);
}

/* What Section */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.category-card {
    background-color: var(--color-surface-elevated);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: var(--transition);
}

.category-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.category-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.category-card p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Philosophy Section */
.philosophy-section {
    background-color: var(--color-surface);
}

.philosophy-content {
    max-width: 800px;
    margin: 0 auto;
}

.philosophy-quote {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
    border: none;
    padding: 0;
    font-style: normal;
}

.philosophy-intro {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.philosophy-list {
    list-style: none;
    max-width: 500px;
    margin: 0 auto var(--spacing-md);
}

.philosophy-list li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--color-text-secondary);
}

.philosophy-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 600;
}

.philosophy-note {
    text-align: center;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Featured Section */
.coming-soon {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.coming-soon-text {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.coming-soon-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.follow-note {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

/* Users Section */
.users-section {
    background-color: var(--color-surface);
}

.users-list {
    list-style: none;
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

.users-list li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

.users-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 600;
}

.users-note {
    text-align: center;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Updates Section */
.updates-description {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.cta-button {
    text-align: center;
}

.cta-button a {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--color-bg);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    font-size: 1.125rem;
}

.cta-button a:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 158, 255, 0.3);
}

/* Contact Section */
.contact-section {
    background-color: var(--color-surface);
}

.contact-description {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.contact-email {
    text-align: center;
}

.contact-email a {
    color: var(--color-accent);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 500;
    transition: var(--transition);
}

.contact-email a:hover {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

.contact-note {
    display: block;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    font-style: italic;
}

/* Footer */
.footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    text-align: center;
}

.footer p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.footer-tagline {
    font-weight: 600;
    color: var(--color-text-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-sm);
    }

    .hero {
        padding: var(--spacing-lg) 0;
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

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

    .philosophy-quote {
        font-size: 1.5rem;
    }
}

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

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1.125rem;
    }

    .section-title {
        font-size: 1.75rem;
    }
}