:root {
    --bg: #f5f5f5;
    --text: #222;
    --primary: #007BFF;
    --tab-bg: #ddd;
    --output-bg: #eee;
    --button-bg: #f0f0f0;
    --button-text: #333;
}

body.dark {
    --bg: #121212;
    --text: #f0f0f0;
    --tab-bg: #333;
    --output-bg: #1e1e1e;
    --button-bg: #444;
    --button-text: #f0f0f0;
}

body {
    font-family: Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 20px;
    transition: background 0.3s, color 0.3s;
}

.container {
    max-width: 800px;
    margin: auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    margin: 0;
}

#toggleTheme {
    padding: 5px 10px;
    cursor: pointer;
}

.tabs {
    display: flex;
    justify-content: space-around;
    margin: 20px 0;
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    border: none;
    background: var(--tab-bg);
    color: inherit;
}

.tab.active {
    background: var(--primary);
    color: white;
}

.section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

textarea {
    width: 100%;
    height: 200px;
    margin-bottom: 15px;
    font-family: monospace;
    background: var(--output-bg);
    color: var(--text);
    border: none;
    resize: none;
}

#outputArea {
    background: var(--output-bg);
    padding: 15px;
    white-space: pre-wrap;
    word-wrap: break-word;
    min-height: 150px;
    max-height: 520px;
    border: none;
    overflow-x: auto;
    overflow-y: auto;
}

.copy-btn {
    padding: 5px 10px;
    cursor: pointer;
}

button {
    background-color: var(--button-bg);
    color: var(--button-text);
    padding: 10px 15px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: var(--button-bg);
    opacity: 0.8;
}

button.action-btn {
    margin: 5px;
    padding: 10px 15px;
    cursor: pointer;
}

footer {
    text-align: center;
    margin-top: 40px;
    font-size: 0.9em;
}

footer a {
    color: var(--primary);
    text-decoration: none;
}

button.copy-btn {
    margin-left: 10px;
    padding: 5px 10px;
    cursor: pointer;
}

#actionButtons {
    display: flex;
    justify-content: center;
    align-items: center;
}