:root {
    --bg: #090d16;
    --window-bg: rgba(15, 23, 42, 0.9);
    --green: #10b981;
    --cyan: #06b6d4;
    --text: #f8fafc;
    --border: rgba(148, 163, 184, 0.2);
    --font: 'JetBrains Mono', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    min-height: 100vh;
    padding: 24px;
}

/* Top OS Status Bar */
.os-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 10px 20px;
    margin-bottom: 24px;
    font-size: 0.85rem;
}

.os-title { color: var(--cyan); font-weight: bold; }

/* Desktop Grid Window Layout */
.window-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 20px;
}

.window {
    background: var(--window-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.window-header {
    background: rgba(30, 41, 59, 0.9);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
    color: #94a3b8;
}

.window-dots { display: flex; gap: 6px; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.window-body { padding: 20px; font-size: 0.9rem; }
.btn-cmd {
    background: var(--cyan);
    color: #000;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-family: inherit;
    font-weight: bold;
    cursor: pointer;
    margin-top: 12px;
}