:root {
    --bg-dark: #121212;
    --bg-light: rgb(215,226,250);
    --card-dark: #1e1e1e;
    --card-light: #fff;
    --text-dark: #eaeaea;
    --text-light: #333;
    --accent: #7f4caf;
}

body {
    font-family: Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-dark);
    margin: 0;
    padding: 20px;
    transition: background-color 0.3s, color 0.3s;
}

body.light {
    background-color: var(--bg-light);
    color: var(--text-light);
}

header, footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background-color: var(--accent);
    border-radius: 10px;
    margin-bottom: 20px;
    color: white;
}

section {
    background-color: var(--card-dark);
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 20px;
    transition: background-color 0.3s, color 0.3s;
}

body.light section {
    background-color: var(--card-light);
    color: var(--text-light);
}

button, input[type="reset"] {
    padding: 10px 15px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    background-color: var(--accent);
    color: black;
    margin-top: 10px;
}

input, input[type="number"] {
    padding: 8px;
    border-radius: 8px;
    border: 1px solid #333;
    margin-bottom: 10px;
}

.generated {
    animation: popIn 0.3s ease;
}

.copied {
    animation: flash 0.5s ease;
}

@keyframes popIn {
    from {opacity:0; transform:scale(0.8);}
    to {opacity:1; transform:scale(1);}
}

@keyframes flash {
    0% {background-color: var(--accent);}
    100% {background-color: var(--card-dark);}
}

body.light .copied {
    animation: flash 0.5s ease forwards;
    
}
