:root {
    --neon-green: #00ff66;
    --neon-red: #ff0055;
    --dark-bg: #0a0a0c;
    --term-dim: #003311;
}

body {
    background-color: var(--dark-bg);
    color: var(--neon-green);
    font-family: 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

#terminal {
    width: 600px;
    border: 2px solid var(--neon-green);
    box-shadow: 0 0 15px var(--neon-green);
    padding: 20px;
    background: #000;
}

header {
    border-bottom: 1px solid var(--neon-green);
    padding-bottom: 10px;
    margin-bottom: 15px;
}

#status-bar {
    display: flex;
    justify-content: space-between;
    font-weight: bold;
}

#visual-grid {
    display: flex;
    justify-content: space-around;
    margin: 20px 0;
}

.node {
    border: 1px solid var(--neon-green);
    padding: 15px;
    text-align: center;
    background-color: var(--term-dim);
}

#log-output {
    height: 150px;
    border: 1px dashed var(--neon-green);
    overflow-y: auto;
    padding: 10px;
    background: #051105;
    margin-bottom: 15px;
}

.sys { color: var(--neon-green); }
.warn { color: var(--neon-red); }

button {
    background: #000;
    color: var(--neon-green);
    border: 1px solid var(--neon-green);
    padding: 8px 12px;
    cursor: pointer;
    font-family: inherit;
    margin-right: 5px;
}

button:hover {
    background: var(--neon-green);
    color: #000;
}