:root {
    --color-text: #333;
    --color-background: #ffffff;
    --color-primary: #0056b3;
    --color-primary-dark: #003d7a;
    --color-secondary: #6c757d;
    --color-accent: #17a2b8;
    --color-border: #e2e2e2;
    --color-light: #f8f9fa;
    --color-dark: #343a40;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.5rem;
    
    --border-radius: 4px;
    --box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

html, body {
    position: relative;
    width: 100%;
    height: 100%;
}

body {
    background-color: var(--color-background);
    color: var(--color-text);
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-dark);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

p {
    margin-bottom: var(--spacing-md);
}

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

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

button {
    background-color: var(--color-primary);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    cursor: pointer;
    font-size: 1rem;
    padding: var(--spacing-sm) var(--spacing-md);
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: var(--color-primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
}