:root{--bg-primary: #ffffff;--bg-secondary: #ffffff;--bg-card: #ffffff;--bg-card-hover: #f5f5f0;--border: #d4d4d0;--border-light: #b4b4b0;--text-primary: #1a1a1a;--text-secondary: #555555;--text-muted: #888888;--accent-red: #1a1a1a;--accent-blue: #3b82f6;--accent-green: #16a34a;--accent-gold: #b45309;--accent-orange: #d97706;--accent-purple: #7c3aed;--chart-grid: #e8e8e3;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace}*{margin:0;padding:0;box-sizing:border-box}html{font-size:17px}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);line-height:1.7;-webkit-font-smoothing:antialiased}.app{min-height:100vh;display:flex;flex-direction:column}.header{padding:20px 32px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;background:var(--bg-secondary)}.header-title{display:flex;align-items:baseline;gap:12px}.header h1{font-size:1.15rem;font-weight:800;letter-spacing:-.02em;text-transform:uppercase}.header .subtitle{font-size:.75rem;color:var(--text-secondary)}.tab-nav{display:flex;gap:2px;padding:0 32px;background:var(--bg-secondary);border-bottom:1px solid var(--border)}.tab-btn{padding:10px 20px;background:none;border:none;color:var(--text-secondary);font-family:var(--font-sans);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;cursor:pointer;border-bottom:2px solid transparent;transition:color .2s}.tab-btn:hover{color:var(--text-primary)}.tab-btn.active{color:var(--text-primary);border-bottom-color:var(--text-primary)}.filter-bar{display:flex;align-items:center;gap:24px;padding:12px 32px;background:var(--bg-secondary);border-bottom:1px solid var(--border);flex-wrap:wrap}.filter-group{display:flex;align-items:center;gap:8px}.filter-label{font-size:.65rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-secondary)}.filter-btn-group{display:flex;overflow:hidden;border:1px solid var(--border)}.filter-btn{padding:5px 12px;background:var(--bg-card);border:none;color:var(--text-secondary);font-family:var(--font-sans);font-size:.7rem;cursor:pointer;transition:all .2s;border-right:1px solid var(--border)}.filter-btn:last-child{border-right:none}.filter-btn:hover{background:var(--bg-card-hover)}.filter-btn.active{background:var(--text-primary);color:#fff}.circuit-select{padding:5px 10px;background:var(--bg-card);border:1px solid var(--border);color:var(--text-primary);font-family:var(--font-sans);font-size:.7rem;cursor:pointer;min-width:180px}.circuit-select option{background:var(--bg-card)}.main-content{flex:1;padding:24px 32px;overflow-y:auto}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:var(--bg-card);border-bottom:1px solid var(--border);padding:16px 20px;transition:border-color .2s}.stat-card:hover{border-color:var(--border-light)}.stat-value{font-size:1.65rem;font-weight:800;font-family:var(--font-mono);letter-spacing:-.02em}.stat-value.red{color:var(--text-primary)}.stat-value.blue{color:var(--accent-blue)}.stat-value.green{color:var(--accent-green)}.stat-value.gold{color:var(--accent-gold)}.stat-value.purple{color:var(--accent-purple)}.stat-label{font-size:.65rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-secondary);margin-top:4px}.stat-sub{font-size:.65rem;color:var(--text-muted);margin-top:2px}.chart-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:24px}.chart-panel{background:var(--bg-card);border:1px solid var(--border);padding:20px;overflow:hidden}.chart-panel.full{grid-column:1 / -1}.chart-title{font-size:.85rem;font-weight:800;letter-spacing:-.02em;margin-bottom:4px}.chart-subtitle{font-size:.65rem;color:var(--text-secondary);margin-bottom:16px}.chart-svg{width:100%;overflow:visible}.circuit-layout{display:grid;grid-template-columns:1fr 1fr;gap:20px}.circuit-layout .chart-panel.map{min-height:500px}.corner-detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}.corner-stat{display:flex;justify-content:space-between;align-items:baseline;padding:8px 12px;background:var(--bg-card-hover)}.corner-stat-label{font-size:.65rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;font-weight:600}.corner-stat-value{font-size:.82rem;font-weight:600;font-family:var(--font-mono)}.overtake-table{width:100%;border-collapse:collapse;font-size:.7rem}.overtake-table th{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border);font-size:.6rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-secondary);font-weight:600}.overtake-table td{padding:6px 10px;border-bottom:1px solid var(--border);color:var(--text-primary)}.overtake-table tr:hover td{background:var(--bg-card-hover)}.drs-badge{display:inline-block;padding:1px 6px;font-size:.6rem;font-weight:600}.drs-badge.active{background:#3b82f61a;color:var(--accent-blue)}.drs-badge.inactive{background:#0000000d;color:var(--text-secondary)}.chart-tooltip{position:fixed;pointer-events:none;background:var(--bg-card);border:1px solid var(--border);padding:10px 14px;font-size:.7rem;box-shadow:0 2px 8px #00000014;z-index:1000;max-width:260px}.chart-tooltip .tt-title{font-weight:800;margin-bottom:4px}.chart-tooltip .tt-row{display:flex;justify-content:space-between;gap:16px;color:var(--text-secondary)}.chart-tooltip .tt-row .tt-val{font-family:var(--font-mono);color:var(--text-primary)}.loading-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;flex-direction:column;gap:16px}.loading-spinner{width:32px;height:32px;border:2px solid var(--border);border-top-color:var(--text-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.circuit-list{display:flex;flex-direction:column;gap:0}.circuit-list-item{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;cursor:pointer;transition:opacity .2s;font-size:.76rem;border-bottom:1px solid var(--border)}.circuit-list-item:first-child{border-top:1px solid var(--border)}.circuit-list-item:hover{opacity:.6}.circuit-list-item.selected{background:var(--bg-card-hover)}.circuit-list-item .corner-count{font-size:.65rem;color:var(--text-secondary);font-family:var(--font-mono)}.year-slider-container{display:flex;align-items:center;gap:8px}.year-slider-container input[type=range]{width:100px;accent-color:var(--text-primary)}.year-display{font-family:var(--font-mono);font-size:.7rem;color:var(--text-primary);min-width:70px}.analysis-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.table-scroll{max-height:300px;overflow-y:auto}.no-data{text-align:center;color:var(--text-secondary);padding:40px;font-size:.82rem}@media (max-width: 1024px){.chart-row,.circuit-layout,.analysis-grid{grid-template-columns:1fr}}