:root {
    --bg-dark: #0f172a;
    --bg-panel: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: #334155;
    --success: #10b981
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    line-height: 1.6
}

.container {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 1rem
}

.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem
}

h2 {
    margin-top: 0;
    color: #fff;
    font-size: 1.25rem;
    margin-bottom: 1rem
}

.tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 1rem
}

.tab-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 6px 6px 0 0;
    cursor: pointer;
    font-size: 0.9rem
}

.tab-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff
}

textarea {
    width: 100%;
    min-height: 200px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 12px;
    border-radius: 6px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
    resize: vertical;
    box-sizing: border-box
}

textarea:focus {
    outline: none;
    border-color: var(--accent)
}

.btn-group {
    display: flex;
    gap: 10px;
    margin-top: 1rem
}

.btn {
    background: var(--accent);
    border: none;
    color: #fff;
    padding: 10px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    flex: 1
}

.btn:hover {
    background: var(--accent-hover)
}