:root {
    --white-color: #FFFFFF;
    --gold-color: #FFD700;
    --transition-speed: 0.6s;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    background-color: #000000;
    position: relative;
}

/* WARSTWA 1: TŁO - z-index: 1 */
.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    background-color: #000000;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    
    opacity: 0;
    transition: opacity 2s ease-in-out;
    filter: brightness(0.9);
}

/* Ken Burns animacja - TYLKO w reveal-mode */
@keyframes zoomMove {
    0% { transform: scale(1); }
    100% { transform: scale(1.08); }
}

body.reveal-mode .background-container {
    opacity: 1;
    animation: zoomMove 30s ease-in-out infinite alternate;
}

/* WARSTWA 2: NAPIS - z-index: 100 */
.content-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    box-sizing: border-box;
    z-index: 100;
    pointer-events: auto;
}

/* Styl napisu */
.title-text {
    font-size: clamp(1.2rem, 4vw, 2.5rem);
    font-weight: 300;
    letter-spacing: 0.3em;
    color: var(--white-color);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    transition: all var(--transition-speed) cubic-bezier(0.34, 1.56, 0.64, 1);
    margin: 0;
    padding: 0;
}

/* Efekt aktywacji */
.title-text:active {
    transform: scale(0.97);
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.6);
}

/* Złoty tryb - po kliknięciu */
body.reveal-mode .title-text {
    color: var(--gold-color);
    text-shadow: 
        0 0 20px rgba(255, 215, 0, 0.6),
        0 0 40px rgba(255, 215, 0, 0.3),
        0 0 60px rgba(255, 215, 0, 0.2);
}