:root {
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-primary-green: #00FF7F;
    --color-secondary-green: #00C460;
    --color-dark-gray: #1A1A1A;
    --color-card-gray: #2A2A2A;
    --color-light-gray: #B0B0B0;
    --color-secondary-text: #D0D0D0;
    --color-yellow: #FED929;
    --color-red: #FF4444;
    --color-border: #333333;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--color-black);
    color: var(--color-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg);
}

header {
    margin-bottom: var(--spacing-3xl);
}

.logo {
    display: flex;
    align-items: center;
    font-size: 48px;
    font-weight: 800;
    letter-spacing: 0.1em;
}

.logo-text {
    color: var(--color-white);
}

.logo-e {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 0 4px 0 2px;
    align-self: center;
}

.e-line {
    width: 26px;
    height: 6px;
    background-color: var(--color-yellow);
    border-radius: 0;
}

main {
    flex: 1;
    width: 100%;
    max-width: 800px;
    text-align: center;
}

h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.tagline {
    font-size: 24px;
    font-weight: 300;
    color: var(--color-secondary-text);
    margin-bottom: var(--spacing-2xl);
}

.description {
    font-size: 18px;
    color: var(--color-white);
    margin-bottom: var(--spacing-3xl);
    line-height: 1.8;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.feature {
    background-color: var(--color-card-gray);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
}


.feature h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-yellow);
}

.feature p {
    font-size: 16px;
    color: var(--color-light-gray);
}

.cta {
    background-color: var(--color-card-gray);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-3xl);
}

.cta h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

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

footer {
    margin-top: auto;
    padding-top: var(--spacing-2xl);
    text-align: center;
}

.social-links {
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.social-links a {
    color: var(--color-secondary-text);
    text-decoration: none;
    font-size: 16px;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.social-links a:hover {
    color: var(--color-yellow);
}

footer p {
    color: var(--color-light-gray);
    font-size: 14px;
}

.social-links img[alt="X"] {
    filter: invert(1);
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }
    
    .logo {
        font-size: 36px;
    }
    
    .e-line {
        width: 18px;
        height: 4px;
    }
    
    h1 {
        font-size: 36px;
    }
    
    .tagline {
        font-size: 20px;
    }
    
    .description {
        font-size: 16px;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
}