:root {
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;

    --font-xs: 0.75rem;    
    --font-sm: 0.875rem;   
    --font-base: 1rem;     
    --font-lg: 1.125rem;   
    --font-xl: 1.25rem;    
    --font-2xl: 1.5rem;    
    --font-3xl: 1.875rem;  
    --font-4xl: 2.25rem;   

    --color-primary: #2563eb;        
    --color-secondary: #f97316;      
    --color-background: #f8fafc;     
    --color-text: #1e293b;           
    --color-muted: #64748b;          
    
    --color-primary-light: #dbeafe;  
    --color-primary-dark: #1d4ed8;
}

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

body {
    font-family: var(--font-body);
    font-size: var(--font-base);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    padding: 40px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    margin-bottom: 0.75rem;
    font-weight: 700;
}

h1 { font-size: var(--font-4xl); font-weight: 800; }
h2 { font-size: var(--font-3xl); }
h3 { font-size: var(--font-2xl); }
h4 { font-size: 1.25rem; font-weight: 600; }
h5 { font-size: 1rem; font-weight: 600; }
h6 { font-size: var(--font-sm); font-weight: 500; }

p {
    margin-bottom: 1rem;
}

.small-text {
    font-size: var(--font-sm);
    color: var(--color-muted);
}

nav {
    background-color: #172554;
    padding: 15px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 5px;
}

nav a:hover {
    background-color: #334155;
}

nav a[aria-current="page"] {
    background-color: #facc15;
    color: #172554;
    font-weight: bold;
    text-decoration: underline;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

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

.btn {
    background-color: var(--color-primary);
    color: white;
    font-family: var(--font-heading);
    font-size: var(--font-base);
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

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

.card {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--color-primary-light);
    max-width: 600px;
    margin-top: 20px;
}