:root{--bg-color:#121212;--text-color:#e0e0e0;--header-bg:linear-gradient(135deg, #000 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 #00000080}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-color);-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif}.app{flex-direction:column;height:100vh;display:flex}.header{background:var(--header-bg);color:#fff;z-index:10;justify-content:space-between;align-items:center;padding:1rem 2rem;display:flex;box-shadow:0 2px 8px #0006}.header h1{font-size:1.5rem;font-weight:600}.header-controls{align-items:center;gap:1rem;display:flex}.header-controls select,.header-controls button{border:1px solid 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