:root{
    --bcg-color: #131619;
    --accent-color: #10B981;
    --primary-color: #155e75;
    --border-radius: 8px;
    --secondary-color: #FFFFFF;
    --border-color: #7fb7c9;
}
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}

body{
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--bcg-color);
    color: var(--secondary-color);
}

.box{
    background-color: rgba(255,255,255,0.03);
    padding: 30px;
    width: 400px;
    border-radius: var(--border-radius);
}

.qr-header h1{
    font-size: 26px;
    text-align: center;
    color: var(--accent-color);
    margin-bottom: 24px;
    text-transform: uppercase;
}

.qr-header input{
    width: 100%;
    margin-block: 12px;
}

.qr-header input, select{
    padding: 8px;
    border-radius: var(--border-radius);
    font-size: 18px;
    outline: none;
    border: 2px solid var(--border-color);
}

.qr-header label{
    color: var(--secondary-color);
    font-size: 20px;
}

.qr-header div{
    display: flex;
    justify-content: space-between;
}

.qr-footer{
    display: flex;
    justify-content: center;
}
.qr-footer a{
    background-color: var(--accent-color);
    text-decoration: none;
    font-size: 20px;
    padding: 14px 36px;
    margin-inline: 2px;
    color: var(--secondary-color);
    font-weight: 600;
    border-radius: var(--border-radius);
}

.qr-body{
    display: grid;
    place-items: center;
    padding:20px;
}

.qr-body img,
.qr-body canvas{
    max-width: 100%;
    height: auto;
    display: block;
    margin-block: 10px;
    padding: 0;
    border: 0.5px solid var(--border-color);
    border-radius: var(--border-radius);
    image-rendering: crisp-edges;
    image-rendering: pixelated;
    background: transparent;
}

/* Theme toggle styles */
.theme-toggle{
    display: flex;
    justify-content: flex-end;
    margin-bottom: 8px;
}
.theme-toggle button{
    background: transparent;
    border: 1px solid rgba(255,255,255,0.12);
    color: var(--secondary-color);
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
}

/* Watermark */
.watermark{
    position: fixed;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 12px;
    color: rgba(255,255,255,0.14);
    pointer-events: none;
}

/* Light theme overrides */
body[data-theme="light"]{
    --bcg-color: #f5f7fb;
    --accent-color: #10B981;
    --secondary-color: #0b1220;
    --border-color: rgba(0,0,0,0.08);
}

@media screen and (max-width:520px){
    .box{
        width: 80%;
    }
    .qr-footer a{
        padding: 12px;
        font-size: 16px;
    }
}