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

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

body {
    font-family: Comfortaa, Helvetica, sans-serif;
    background: #111;
}

/* HLAVNÁ OBRAZOVKA */

.intro {
    position: relative;
    width: 100%;
    height: 100vh;

    display: flex;
    justify-content: center;
    align-items: center;

    background-image: url("img/background.jpg");
    background-size: cover;
    background-position: center;
}

/* STMAVENIE POZADIA */

.overlay {
    position: absolute;
    inset: 0;

    background: rgba(103, 147, 77, 0.45);
}

/* OBSAH */

.content {
    position: relative;
    z-index: 2;

    text-align: center;
    color: white;

    animation: fadeIn 1.2s ease;
}

/* LOGO / NÁZOV */

.logo {
    font-size: clamp(40px, 7vw, 90px);
    font-weight: 700;
    line-height: 0.9;
    letter-spacing: 5px;

    text-shadow:
        0 4px 20px rgba(0,0,0,0.5);
}

.logo span {
    font-weight: 300;
}

/* PODNADPIS */

.subtitle {
    margin-top: 25px;
    margin-bottom: 45px;

    font-size: 18px;
    letter-spacing: 4px;
    text-transform: uppercase;

    opacity: 0.9;
}

/* TLAČIDLO */

.enter-button {
    display: inline-block;

    padding: 18px 55px;

    border: 2px solid white;

    color: white;
    background: transparent;

    text-decoration: none;

    font-size: 17px;
    font-weight: 500;

    letter-spacing: 4px;

    transition:
        background 0.3s ease,
        color 0.3s ease,
        transform 0.3s ease,
        box-shadow 0.3s ease;
}

.enter-button:hover {
    background: white;
    color: #111;

    transform: translateY(-3px);

    box-shadow:
        0 10px 30px rgba(0,0,0,0.3);
}

.enter-button:active {
    transform: translateY(0);
}

/* ANIMÁCIA */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* MOBIL */

@media (max-width: 600px) {

    .logo {
        font-size: 42px;
        letter-spacing: 3px;
    }

    .subtitle {
        font-size: 13px;
        letter-spacing: 2px;
        margin-top: 20px;
        margin-bottom: 35px;
    }

    .enter-button {
        padding: 16px 40px;
        font-size: 15px;
    }
}