:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --bg-hover: #1f2b4d;
    --border: #2a2a4a;
    --text-primary: #e8e8f0;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-glow: rgba(99, 102, 241, 0.15);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --radius: 12px;
    --radius-sm: 8px;
    --sidebar-width: 240px;
    --transition: 0.2s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    -webkit-font-smoothing: antialiased;
}

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header { padding: 20px; border-bottom: 1px solid var(--border); }

.logo { display: flex; align-items: center; gap: 10px; }

.logo-text {
    font-size: 16px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-items { list-style: none; padding: 12px; flex: 1; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition);
    margin-bottom: 4px;
    font-size: 14px;
    user-select: none;
}

.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }

.nav-item.active {
    background: var(--accent-glow);
    color: var(--accent-primary);
    font-weight: 600;
}

.nav-item.active svg { stroke: var(--accent-primary); }

.sidebar-footer { padding: 16px 20px; border-top: 1px solid var(--border); }

.version-badge {
    font-size: 11px;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 4px 10px;
    border-radius: 20px;
    display: inline-block;
}

/* Content */
.content {
    flex: 1;
    overflow-y: auto;
    padding: 32px;
    background: var(--bg-primary);
}

.content::-webkit-scrollbar { width: 6px; }
.content::-webkit-scrollbar-track { background: transparent; }
.content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.page { display: none; animation: fadeIn 0.3s ease; }
.page.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}

.page-header h1 { font-size: 24px; font-weight: 700; letter-spacing: -0.5px; }

.subtitle { color: var(--text-secondary); font-size: 14px; margin-top: 4px; }

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all var(--transition);
}

.stat-card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-2px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.drivers-icon { background: rgba(99, 102, 241, 0.15); color: var(--accent-primary); }
.outdated-icon { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.updates-icon { background: rgba(59, 130, 246, 0.15); color: var(--info); }
.ram-icon { background: rgba(16, 185, 129, 0.15); color: var(--success); }

.stat-value { font-size: 28px; font-weight: 700; display: block; line-height: 1.1; }
.stat-label { font-size: 12px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }

/* Panels */
.dashboard-panels { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.panel-header { padding: 16px 20px; border-bottom: 1px solid var(--border); }

.panel-header h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Quick Actions */
.quick-actions { padding: 20px; display: flex; flex-direction: column; gap: 10px; }

.action-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.action-btn.primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

.action-btn.primary:hover {
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
    transform: translateY(-1px);
}

.action-btn.secondary {
    background: rgba(59, 130, 246, 0.15);
    color: var(--info);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.action-btn.secondary:hover { background: rgba(59, 130, 246, 0.25); }

.action-btn.accent {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.action-btn.accent:hover { background: rgba(16, 185, 129, 0.25); }

.action-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* Resource Bars */
.resource-bars { padding: 20px; display: flex; flex-direction: column; gap: 16px; }

.resource-label { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 6px; }
.resource-label span:first-child { font-weight: 600; }
.resource-label span:last-child { color: var(--text-secondary); }

.progress-bar { height: 8px; background: var(--bg-primary); border-radius: 4px; overflow: hidden; }

.progress-fill { height: 100%; border-radius: 4px; transition: width 0.8s ease; }
.ram-fill { background: linear-gradient(90deg, var(--success), #34d399); }
.disk-fill { background: linear-gradient(90deg, var(--info), #60a5fa); }

/* Driver List */
.driver-summary {
    display: flex;
    gap: 24px;
    margin-bottom: 16px;
    padding: 14px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.summary-item { font-size: 13px; color: var(--text-secondary); }
.summary-item strong { color: var(--text-primary); font-size: 16px; margin-right: 4px; }
.summary-item.warning strong { color: var(--warning); }
.summary-item.error strong { color: var(--danger); }

.filter-bar { display: flex; gap: 8px; margin-bottom: 16px; }

.filter-btn {
    padding: 6px 16px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.filter-btn:hover { border-color: var(--accent-primary); color: var(--accent-primary); }

.filter-btn.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.driver-list, .update-list { display: flex; flex-direction: column; gap: 8px; }

.driver-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all var(--transition);
}

.driver-card:hover { border-color: var(--accent-primary); background: var(--bg-hover); }
.driver-card.outdated { border-left: 3px solid var(--warning); }
.driver-card.error { border-left: 3px solid var(--danger); }

.driver-class-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: rgba(99, 102, 241, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    font-size: 18px;
    flex-shrink: 0;
}

.driver-info { flex: 1; min-width: 0; }

.driver-name {
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.driver-meta { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.driver-badges { display: flex; gap: 6px; flex-shrink: 0; }

.badge { font-size: 11px; padding: 3px 10px; border-radius: 20px; font-weight: 600; }
.badge-signed { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge-unsigned { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.badge-outdated { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.badge-ok { background: rgba(16, 185, 129, 0.15); color: var(--success); }

/* Update Cards */
.update-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    transition: all var(--transition);
}

.update-card:hover { border-color: var(--accent-primary); }
.update-card.installed { opacity: 0.6; }
.update-card.pending { border-left: 3px solid var(--info); }

.update-title { font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.update-meta { font-size: 12px; color: var(--text-secondary); display: flex; gap: 16px; flex-wrap: wrap; }

/* System Info Grid */
.sysinfo-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }

.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.info-card h4 {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent-primary);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 13px;
    border-bottom: 1px solid rgba(42, 42, 74, 0.5);
}

.info-row:last-child { border-bottom: none; }
.info-key { color: var(--text-secondary); }

.info-val {
    font-weight: 600;
    text-align: right;
    max-width: 60%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Empty State */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state p { margin-top: 16px; font-size: 14px; }

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 15, 26, 0.85);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay p { margin-top: 16px; color: var(--text-secondary); font-size: 14px; }

@media (max-width: 900px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .dashboard-panels { grid-template-columns: 1fr; }
    .sysinfo-grid { grid-template-columns: 1fr; }
}