body {
    font-family: 'Arial', sans-serif;
    background: #f4f4f4;
    margin: 0;
    padding: 0;
    text-align: center;
    transition: background 0.5s ease-in-out;
}

header {
    background: #333;
    color: white;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header button, select {
    padding: 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.editor-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    padding: 10px;
}

.editor {
    flex: 1;
    min-width: 300px;
    max-width: 400px;
}

textarea {
    width: 100%;
    height: 150px;
    font-size: 16px;
    padding: 5px;
    border-radius: 5px;
}

iframe {
    width: 100%;
    height: 300px;
    border: 1px solid #ccc;
    margin-top: 10px;
    background: white;
}

/* Themes */
.dark-mode {
    background: #222;
    color: white;
}

.gold-mode {
    background: linear-gradient(to right, #d4af37, #ffcc00);
    color: black;
}

.neon-mode {
    background: #0d0d0d;
    color: #39ff14;
}

.cyan-mode {
    background: linear-gradient(to right, #40E0D0, #008080);
    color: white;
}

.green-mode {
    background: linear-gradient(to right, #AAFF00, #097969);
    color: white;
}