@import url('https://fonts.googleapis.com/css2?family=Caveat:wght@400..700&family=Comfortaa:wght@300..700&family=Host+Grotesk:ital,wght@0,300..800;1,300..800&family=Lato:ital,wght@0,100;0,300;0,400;0,700;0,900;1,100;1,300;1,400;1,700;1,900&family=Noto+Color+Emoji&family=Nunito+Sans:ital,opsz,wght@0,6..12,200..1000;1,6..12,200..1000&family=Nunito:ital,wght@0,200..1000;1,200..1000&family=Pacifico&family=Playwrite+GB+S:ital,wght@0,100..400;1,100..400&family=Rethink+Sans:ital,wght@0,400..800;1,400..800&family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&family=Rubik+Moonrocks&family=Tangerine:wght@400;700&display=swap');

body {
    font-family: 'Nunito', sans-serif;
    margin: 0;
    padding: 0;
    color: white;
    line-height: 1.6;
    background-color: #000; /* fallback, kdyby obrázek nesel */
    background-size: cover;
    background-position: center;
    transition: background-image 0.5s ease-in-out;
}

/* Responsivní pozadí */
@media (max-width: 640px) {
    body {
        padding: 50px 5%;
        height: 90vh;
        background-image: url('zakladnicss/black-hole-4092609_640.jpg');
    }
}

@media (min-width: 641px) and (max-width: 1280px) {
    body {
        height: 90vh;
        background-image: url('zakladnicss/black-hole-4092609_1280.jpg');
    }
}

@media (min-width: 1281px) {
    body {
        height: 90vh;
        background-image: url('zakladnicss/black-hole-4092609_1920.jpg');
    }
}

/* Nadpisy */
h1 {
    text-align: center;
    padding-top: 80px;
    font-size: clamp(2.5rem, 5vw, 4.5rem); /* dynamická velikost podle obrazovky */
    font-weight: 700;
    color: #fff;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.7);
}

h2 {
    text-align: center;
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 600;
    margin: 10px 0;
    color: #fff;
}

/* Odstavce */
p {
    text-align: center;
    font-size: clamp(1rem, 2.5vw, 1.6rem);
    margin: 10px 20px;
}

/* Navigace */
nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    padding-top: 100px;
}

nav a {
    display: inline-block;
    text-decoration: none;
    padding: 10px 20px;
    background-color: rgba(59, 59, 87, 0.6);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 20px;
    transition: all 0.3s ease;
    font-weight: 500;
}

nav a:hover {
    background-color: rgba(100, 100, 120, 0.8);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.4);
}

/* Články */
article {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 20px 0;
}