:root {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --accent-color: #4a9eff;
    --border-color: #333;
    --button-bg: #2a2a2a;
    --button-hover: #3a3a3a;
    --error-border-color: #ff4444;
}

html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: "Fira Code", monospace;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    height: 100vh;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

h1 {
    color: var(--accent-color);
    text-align: center;
    margin-bottom: 2rem;
    flex-shrink: 0;
}

.controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    width: 100%;
    flex-shrink: 0;
}

button {
    background-color: var(--button-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

textarea {
    width: 100%;
    min-height: 40vh;
    max-height: 40vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 4px;
    font-family: "Fira Code", monospace;
    margin-bottom: 1rem;
    resize: none;
    box-sizing: border-box;
    overflow-y: auto;
    flex-shrink: 0;
}

pre {
    background-color: var(--button-bg);
    padding: 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    white-space: pre-wrap;
    height: 20vh;
    width: 100%;
    box-sizing: border-box;
    overflow-y: auto;
    transition: border-color 0.2s;
    flex-shrink: 0;
}

pre.error {
    border-color: var(--error-border-color);
}

select {
    background-color: var(--button-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 4px;
    flex-grow: 1;
}

footer {
    margin-top: auto;
    padding-top: 2rem;
    text-align: center;
    color: var(--text-color);
    opacity: 0.8;
    font-size: 0.9rem;
    flex-shrink: 0;
}

footer a {
    color: var(--accent-color);
    text-decoration: none;
    transition: opacity 0.2s;
}

footer a:hover {
    opacity: 0.8;
}