:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --danger: #ef4444;
    --warning: #f59e0b;
    --success: #22c55e;
    --border: rgba(148, 163, 184, 0.1);
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    margin: 0;
    min-height: 100vh;
}

/* Layout */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    margin-bottom: 2rem;
    border-bottom: var(--glass-border);
}

.brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 1.5rem;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--accent);
}

/* Cards & Glassmorphism */
.glass-panel {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: var(--glass-border);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

input, select {
    width: 100%;
    padding: 0.75rem;
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 0.5rem;
    color: white;
    font-size: 1rem;
    transition: all 0.2s;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
    padding: 0.5rem 0;
}

.checkbox-group input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    margin: 0;
    cursor: pointer;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--danger);
}

/* Grid System */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 1.5rem;
    row-gap: 1.5rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    column-gap: 1.5rem;
    row-gap: 1.5rem;
}

@media (max-width: 768px) {
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
}

/* Stats Cards */
.stat-card {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-top: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Status Indicators */
.status {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
}

.status-running {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.1);
}

.status-stopped {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.status-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

/* Dropdown Menu */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    right: 0;
    top: 100%;
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    z-index: 100;
    min-width: 120px;
    display: none;
    padding: 0.5rem 0;
    margin-top: 0.5rem;
}

.dropdown.active .dropdown-menu {
    display: block;
    animation: fadeIn 0.15s ease-out;
}

.dropdown-item {
    padding: 0.6rem 1rem;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.1s;
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.dropdown-item.danger {
    color: var(--danger);
}

.dropdown-item.success {
    color: var(--success);
}

/* Utils */
.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem;
    cursor: pointer;
    border-radius: 0.5rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.status-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

/* Loading */
.loader {
    border: 3px solid rgba(255,255,255,0.1);
    border-radius: 50%;
    border-top: 3px solid var(--accent);
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    display: none;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.4s ease-out;
}