:root {
    --primary-color: #4db8ff;      /* Links and h1 */
    --accent-color: #007acc;       /* Hover */
    --bg-body: #121212;            /* Main background */
    --bg-surface: #1e1e1e;         /* Background (header, main, footer) */
    --bg-element: #2c2c2c;         /* Smaller elements background */
    --text-main: #e0e0e0;          /* Main text */
    --text-muted: #a0a0a0;         /* Footer text */
    --border-color: #333333;       /* Lines and borders */
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

/* Płynne przewijanie do sekcji po kliknięciu w menu */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-body);
}

/* --- Layout --- */
header, main, footer {
    max-width: 1000px;
    margin: 0 auto;
    background-color: var(--bg-surface);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

header {
    padding: 10px 20px; 
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
}

main, footer {
    padding: 20px;
}

main {
    margin-top: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
}

h1, h2, h3 {
    margin-bottom: 15px;
}

header h1 { 
    color: var(--primary-color);
    font-size: 1.5rem; 
    border-bottom: 2px solid var(--accent-color); 
    padding-bottom: 5px; 
    margin-bottom: 5px;  
}

h2 { 
    color: #ffffff; 
    font-size: 1.8rem; 
    margin-top: 30px; 
    border-bottom: 1px solid var(--border-color); 
    padding-bottom: 5px; 
}

h3 { 
    color: var(--primary-color);
    font-size: 1.3rem; 
    margin-top: 15px; 
}

p {
    margin-bottom: 15px;
}

nav {
    background-color: var(--bg-element);
    padding: 8px 10px; 
    margin-top: 5px;
    border-radius: 6px;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

nav a {
    color: var(--text-main);
    text-decoration: none;
    padding: 6px 10px;
    display: block;
    border-radius: 4px;
    transition: background-color 0.2s ease, color 0.2s ease;
    font-size: 0.85rem;
}

nav a:hover, nav a:focus {
    background-color: var(--accent-color);
    color: #ffffff;
    outline: none;
}

section {
    padding-top: 20px; 
    margin-bottom: 40px;
    /* Odstęp skrolowania dobrany do cieńszego headera */
    scroll-margin-top: 130px; 
}

.examples {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
}

.example {
    flex: 1 1 45%; 
    background-color: var(--bg-element);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.example img {
    max-width: 100%;
    height: auto;
    display: block;
    margin-bottom: 15px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

footer {
    text-align: center;
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* --- RWD (Responsywność) --- */

@media (max-width: 768px) {
    nav ul {
        flex-direction: row; 
        flex-wrap: nowrap; 
        overflow-x: auto; 
        -webkit-overflow-scrolling: touch; 
        padding-bottom: 5px; 
    }
    
    nav a {
        flex-shrink: 0; 
        white-space: nowrap; 
    }

    
    nav ul::-webkit-scrollbar {
        height: 4px;
    }
    nav ul::-webkit-scrollbar-thumb {
        background: var(--accent-color);
        border-radius: 4px;
    }

    .example {
        flex: 1 1 100%; 
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.3rem;
    }
    h2 {
        font-size: 1.5rem;
    }
    header {
        padding: 10px;
    }
    main, footer {
        padding: 15px;
    }
    nav {
        padding: 8px;
    }
}