:root{font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}:root{--bg: #f5f6f8;--surface: #ffffff;--border: #e2e4e9;--text: #1a1d27;--text-muted: #6b7280;--accent: #2563eb;--danger: #dc2626;--danger-bg: rgba(220, 38, 38, .08)}*{margin:0;padding:0;box-sizing:border-box}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6}.app{min-height:100vh;max-width:1000px;margin:0 auto;padding:0 16px}.hero{text-align:center;padding:40px 16px 28px;border-bottom:1px solid var(--border);margin-bottom:24px}.hero h1{font-size:2rem;font-weight:700;margin-bottom:4px}.subtitle{color:var(--text-muted);font-size:1rem}.city-picker{padding:20px 24px}.city-picker-header{margin-bottom:12px}.city-picker-header 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var(--border);border-radius:12px;padding:24px;margin-top:20px}.card.city-picker{margin-top:0}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border)}.card-header h2{font-size:1.15rem;font-weight:600}.alert-count{background:#2563eb14;color:var(--accent);padding:4px 12px;border-radius:999px;font-size:.9rem;font-weight:600}.refresh-btn{background:var(--accent);color:#fff;border:none;padding:6px 16px;border-radius:6px;cursor:pointer;font-size:.85rem;font-weight:500;transition:opacity .2s}.refresh-btn:hover{opacity:.85}.night-config{display:flex;align-items:center;justify-content:center;gap:10px;padding:12px 20px;background:var(--surface);border:1px solid var(--border);border-radius:10px;font-size:.85rem}.night-config-label{color:var(--text);font-weight:600}.night-config-sep{color:var(--text-muted);font-weight:500}.night-select{padding:6px 10px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--text);font-size:.85rem;font-weight:500;outline:none;cursor:pointer;transition:border-color .2s,box-shadow .2s}.night-select:focus{border-color:var(--accent);box-shadow:0 0 0 2px #2563eb26}.chart-legend-custom{display:flex;flex-direction:column;align-items:center;gap:6px;margin:8px 0;font-size:.8rem;color:var(--text-muted)}.legend-row{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}.legend-item{display:flex;align-items:center;gap:6px}.legend-swatch{display:inline-block;width:14px;height:14px;border-radius:3px}.legend-night{background:#1e1b4b33;border:1px solid #818cf8}.legend-day{background:#fff;border:1px solid #d1d5db}.chart-scroll-wrapper{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 -8px;direction:ltr}.chart-inner{width:100%}.loading{text-align:center;color:var(--text-muted);padding:32px}.error{color:var(--danger);padding:12px;background:var(--danger-bg);border-radius:8px}.no-history{color:var(--text-muted);text-align:center;padding:32px}.empty-state{display:flex;flex-direction:column;align-items:center;gap:16px;padding:48px 24px}.empty-state svg{opacity:.4}.alerts-table-wrapper{max-height:500px;overflow-y:auto}.alerts-table{width:100%;border-collapse:collapse;table-layout:fixed}.alerts-table thead{position:sticky;top:0;z-index:1}.alerts-table th{background:var(--surface);text-align:center;padding:10px 16px;font-size:.85rem;font-weight:600;color:var(--text-muted);border-bottom:2px solid var(--border)}.alerts-table td{padding:9px 16px;font-size:.9rem;color:var(--text);border-bottom:1px solid var(--border);text-align:center}.alerts-table tbody tr:hover{background:var(--bg)}.city-badge{padding:2px 10px;border-radius:4px;font-size:.8rem;font-weight:600;border:1px 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