body {
    margin: 0;
    background: #f6f6f6;
    font-family: "DM Serif Display", serif;
    font-size: 1.3em;
}

h1 {
			color: #3a4271;
			text-align:center;
			font-style: italic;
			font-size: 1.5em;
}

.container {
    width: 80%;
    margin: 50px auto;
}

.content {
    display: flex;
}

nav {
    width: 20%;
    padding: 15px;
    margin-top: 50px;
}

main {
    width: 80%;
    padding: 50px;
    margin-left: 50px;
}

footer {
    margin-top: 20px;
    padding: 10px 0;
    text-align: center;
    border-top: 1px solid #ccc;
}

ul {
    list-style: none;
    padding: 0;
}

li {
    margin-bottom: 10px;
}

a {
    text-decoration: none;
    color: #333;
}

a:hover {
    text-decoration: underline;
}

.kartka {
    background: #fff;
    padding: 50px;
    border-radius: 6px;
    border: 1px solid #ddd;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.strona_nr {
    padding: 50px;
    text-align: center;
}

header {
    position: relative;
}

/* Hamburger */
.hamburger {
    display: none;
    position: absolute;
    right: 0;
    top: 10px;
    width: 35px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 3px;
    background: #333;
    margin: 6px 0;
    transition: 0.3s ease;
}

/* Animation to X */
.hamburger.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

@media (max-width: 768px) {

    .container {
        width: 95%;
        margin: 20px auto;
    }

    .content {
        flex-direction: column;
    }

    nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 70%;
        height: 100%;
        background: #fff;
        padding: 40px 20px;
        box-shadow: 5px 0 15px rgba(0,0,0,0.2);
        transition: left 0.3s ease;
        z-index: 1000;
    }

    nav.active {
        left: 0;
    }

    main {
        width: 100%;
        padding: 20px;
        margin-left: 0;
    }

    .kartka {
        padding: 20px;
    }

    .strona_nr {
        padding: 20px;
    }

    .hamburger {
        display: block;
    }
	
}