body {
    margin: 0;
    font-family: "Courier New", monospace;
    background: #1e1e2e;
    color: #e5e7eb;
}

.center {
    display: flex;
    flex-direction: column; 
    align-items: center;
    justify-content: center;
    height: 100vh;
    gap: 20px;
}

.center h1 {
    color: #a78bfa;
    margin-bottom: 20px;
}

button {
    background: linear-gradient(90deg, #7c3aed, #9333ea);
    border: none;
    padding: 10px;
    color: white;
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
}

button:hover {
    opacity: 0.9;
}

.hidden {
    display: none;
}

#app {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 260px;
    background: #2a2a3e;
    padding: 16px;
    box-sizing: border-box;
}

.sidebar h2 {
    color: #a78bfa;
    font-size: 14px;
    margin-bottom: 2px;
}

.subtitle {
    color: #6b7280;
    font-size: 11px;
    margin-bottom: 16px;
}

.section {
    color: #6b7280;
    font-size: 11px;
    margin-top: 12px;
    margin-bottom: 4px;
}

input, select {
    width: 100%;
    padding: 8px;
    margin-bottom: 8px;
    background: #1e1e2e;
    border: none;
    color: white;
    font-family: inherit;
}

.main {
    flex: 1;
    padding: 12px;
}

canvas {
    background: #12121f;
    width: 100%;
    height: 450px;
}

pre {
    margin-top: 10px;
    color: #22c55e;
    font-size: 13px;
}