:root{--bg-color: #121212;--text-color: #e0e0e0;--header-bg: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);--card-bg: #1e1e1e;--sidebar-bg: #181818;--border-color: #333;--accent-color: #3498db;--hover-bg: #2a2a2a;--muted-text: #999;--detail-group-bg: #222;--shadow: 0 4px 12px rgba(0, 0, 0, .5)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:var(--bg-color);color:var(--text-color);-webkit-text-size-adjust:100%;text-size-adjust:100%}.app{display:flex;flex-direction:column;height:100vh}.header{background:var(--header-bg);color:#fff;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 8px #0006;z-index:10}.header h1{font-size:1.5rem;font-weight:600}.header-controls{display:flex;gap:1rem;align-items:center}.header-controls select,.header-controls button{padding:.5rem 1rem;border:1px solid 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