#topPanel {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 1vw;
    width: 100%;
    max-width: 100vw;
    padding: 1vw 2vw;
    box-sizing: border-box;
    background: rgba(255, 255, 255, 0.85);
    position: relative;
    z-index: 10;
}
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-image: url('background.png');
    min-height: 100vh;
    width: 100%;
    background-position: center;
    background-repeat: no-repeat;
    /* Allow scrolling on mobile */
}

html {
    touch-action: manipulation;
}

@media (min-width: 769px) {
    body.no-scroll {
        width: 100%;
        height: 100%;
        overflow: hidden;
    }
}

h1 {
    text-align: center;
    position: relative;
    z-index: 3;
    color: black;
    border: solid 2px #ffffff;
    background-color: #ffffff;
    margin: 1vh auto;
}

#overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

#levels {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    position: relative;
    z-index: 2;
    overflow-y: auto;
    max-height: 80vh;
    -webkit-overflow-scrolling: touch;
    width: 100vw;
    box-sizing: border-box;
    /* On mobile, ensure #levels fills available space and scrolls */
}

@media (min-width: 769px) {
    #levels {
        overflow-y: hidden;
        max-height: none;
        padding: 0.5vh 1vw 1vh;
        gap: 0.8vw;
    }

    .level {
        width: clamp(110px, 11vw, 180px);
        height: clamp(110px, 11vw, 180px);
        margin: 0;
    }
}

.level {
    margin: 10px;
    cursor: pointer;
    border: 2px solid #ccc;
    border-radius: 5px;
    overflow: hidden;
    position: relative;
    width: 200px;
    height: 200px;
}

.level.locked {
    cursor: not-allowed;
}

.level.locked img {
  filter: grayscale(100%) brightness(50%);
}

.level img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: center;
}

.level .name {
    position: absolute;
    bottom: 0;
    background: rgba(0,0,0,0.7);
    color: white;
    width: 100%;
    text-align: center;
    padding: 5px;
}

canvas {
    border: 1px solid #000;
    display: block;
    margin: 0 auto;
}

#counter {
    background: #ffeb3b;
    color: #000;
    padding: 0.7em 1.2em;
    border-radius: 1.5em;
    font-weight: bold;
    font-size: 0.3cm;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    border: 2px solid #f57c00;
    margin: 0;
    flex-shrink: 0;
}

#hintBtn {
    background: #ffeb3b;
    color: #000;
    padding: 0.7em 1.2em;
    border-radius: 1.5em;
    font-weight: bold;
    font-size: 0.3cm;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    border: 2px solid #f57c00;
    margin: 0;
    flex-shrink: 0;
}

#backToMenuBtn {
    background: #ffeb3b;
    color: #000;
    padding: 0.7em 1.2em;
    border-radius: 1.5em;
    font-weight: bold;
    font-size: 0.3cm;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    border: 2px solid #f57c00;
    margin: 0;
    flex-shrink: 0;
}

#backBtn {
    background: #ffeb3b;
    color: #000;
    padding: 0.7em 1.2em;
    border-radius: 1.5em;
    font-weight: bold;
    font-size: 0.3cm;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    border: 2px solid #f57c00;
    margin: 0;
    flex-shrink: 0;
}