:root {
    --bg-dark: #0a0c10;
    --panel-bg: #161b22;
    --palo-alto-blue: #0055ff;
    --success-green: #2ea043;
    --alert-red: #da3633;
    --warning-orange: #d29922;
    --text-main: #c9d1d9;
    --text-dim: #8b949e;
    --border-color: #30363d;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Segoe UI', Tahoma, sans-serif;
    margin: 0; padding: 0;
    height: 100vh; display: flex; flex-direction: column;
    overflow: hidden;
}

header {
    background-color: var(--panel-bg);
    border-bottom: 2px solid var(--palo-alto-blue);
    padding: 10px 20px;
    display: flex; justify-content: space-between; align-items: center;
}

.logo-area h1 { margin: 0; font-size: 1.4rem; letter-spacing: 1px; }
.logo-area span { color: var(--palo-alto-blue); }

.status-badge {
    color: var(--success-green);
    border: 1px solid var(--success-green);
    padding: 2px 10px; border-radius: 12px; font-size: 0.75rem; font-weight: bold;
}

.main-layout {
    display: grid;
    grid-template-columns: 250px 1fr 300px;
    gap: 15px; padding: 15px; flex-grow: 1; overflow: hidden;
}

.card {
    background-color: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px; margin-bottom: 15px;
    display: flex; flex-direction: column;
}

.panel-header {
    background: rgba(255,255,255,0.03);
    padding: 8px 12px; border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem; font-weight: bold; text-transform: uppercase; color: var(--text-dim);
    display: flex; justify-content: space-between;
}

.terminal {
    background-color: #000;
    color: #00ff41;
    font-family: 'Courier New', monospace;
    padding: 15px; font-size: 0.9rem;
    overflow-y: auto; flex-grow: 1;
}

.alert-item {
    border-left: 4px solid var(--alert-red);
    background: rgba(218, 54, 51, 0.05);
    padding: 10px; margin-bottom: 10px; font-size: 0.85rem;
}

.alert-item.warning { border-left-color: var(--warning-orange); }

.nav-list { list-style: none; padding: 0; margin: 0; }
.nav-list li {
    padding: 12px; cursor: pointer; border-bottom: 1px solid #21262d; font-size: 0.9rem;
    transition: 0.2s;
}
.nav-list li:hover { background: rgba(0, 85, 255, 0.1); color: var(--palo-alto-blue); }

footer {
    background: var(--panel-bg); border-top: 1px solid var(--border-color);
    padding: 5px; text-align: center; font-size: 0.7rem; color: var(--text-dim);
}