*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f9fafb;--surface: #ffffff;--border: #e5e7eb;--text: #111827;--text-muted: #6b7280;--accent: #2563eb;--accent-hover: #1d4ed8;--radius: 10px}@media (prefers-color-scheme: dark){:root{--bg: #0f172a;--surface: #1e293b;--border: #334155;--text: #f1f5f9;--text-muted: #94a3b8}}body{font-family:system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}.app{max-width:1000px;margin:0 auto;padding:2rem 1rem;display:flex;flex-direction:column;gap:2rem}.app-header h1{font-size:1.75rem;font-weight:700}.subtitle{color:var(--text-muted);margin-top:.25rem;font-size:.9rem}.app-main{display:flex;flex-direction:column;gap:1.5rem}.filter-bar{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.filter-bar label{font-weight:600;white-space:nowrap}.filter-buttons{display:flex;gap:.5rem;flex-wrap:wrap}.filter-btn{padding:.4rem 1rem;border:1px solid var(--border);border-radius:999px;background:var(--surface);color:var(--text);cursor:pointer;font-size:.85rem;transition:background .15s,color .15s}.filter-btn:hover,.filter-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.chart-wrapper{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem}.chart-title{font-size:1.1rem;font-weight:600;margin-bottom:.25rem}.chart-avg{font-size:.875rem;color:var(--text-muted);margin-bottom:1.25rem}.loading,.empty{color:var(--text-muted);text-align:center;padding:3rem 0}.error{color:#dc2626;background:#fef2f2;border:1px solid #fecaca;border-radius:var(--radius);padding:.75rem 1rem;font-size:.9rem}.app-footer{border-top:1px solid var(--border);padding-top:1rem;color:var(--text-muted);font-size:.8rem;text-align:center}