:root {
    --bg-color: #0f172a;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Chart Colors */
    --color-running: rgba(16, 185, 129, 0.8);
    --color-pending: rgba(245, 158, 11, 0.8);
    --color-failed: rgba(239, 68, 68, 0.8);
    --color-unused: rgba(148, 163, 184, 0.15);
    --color-node: rgba(30, 41, 59, 0.9);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    overflow: hidden;
    background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: 1.5rem;
    gap: 1.5rem;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--accent);
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.025em;
}

.toggle-container {
    display: flex;
    background: rgba(15, 23, 42, 0.6);
    padding: 0.25rem;
    border-radius: 0.5rem;
    border: 1px solid var(--glass-border);
}

.toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.toggle-btn.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.main-content {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 1rem;
    overflow: hidden;
}

.loading {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 3rem;
    z-index: 10;
    transition: opacity 0.3s ease;
}

.loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 3rem;
    height: 3rem;
    border: 3px solid rgba(255,255,255,0.1);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.chart-container {
    width: 100%;
    height: 100%;
}

.node-group {
    transition: all 0.3s ease;
}

.node-rect {
    fill: var(--color-node);
    stroke: var(--glass-border);
    stroke-width: 1px;
    rx: 8;
    ry: 8;
}

.pod-rect {
    stroke: rgba(0,0,0,0.3);
    stroke-width: 1px;
    rx: 4;
    ry: 4;
    transition: fill 0.3s ease, opacity 0.3s ease, stroke 0.3s ease;
    cursor: pointer;
}

.pod-rect:hover {
    opacity: 0.9;
    stroke: white;
}

.node-label {
    fill: var(--text-main);
    font-size: 0.875rem;
    font-weight: 600;
    pointer-events: none;
}

.pod-label {
    fill: white;
    font-size: 0.7rem;
    pointer-events: none;
    text-shadow: 0 1px 2px rgba(0,0,0,0.8);
}

.tooltip {
    position: absolute;
    padding: 1rem;
    pointer-events: none;
    z-index: 100;
    font-size: 0.875rem;
    transition: opacity 0.2s ease, transform 0.1s ease;
    min-width: 240px;
}

.tooltip.hidden {
    opacity: 0;
}

.tooltip-title {
    font-weight: 700;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.5rem;
    word-break: break-all;
}

.tooltip-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.25rem;
    gap: 1rem;
}

.tooltip-label {
    color: var(--text-muted);
}

.tooltip-value {
    font-weight: 600;
}