:root{--navy: #1b3a5c;--teal: #0e7490;--amber: #d97706;--red: #9b1c1c;--green: #166534;--bg: #f1f5f9;--white: #ffffff;--slate: #64748b;--border: #e2e8f0}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--navy)}.app-header{background:linear-gradient(135deg,var(--navy) 0%,#234b73 100%);color:var(--white);padding:24px 32px;display:flex;justify-content:space-between;align-items:flex-start;gap:24px;flex-wrap:wrap}.eyebrow{margin:0 0 4px;font-size:11px;text-transform:uppercase;letter-spacing:.1em;opacity:.55}.app-header h1{margin:0;font-size:24px}.subtitle{margin:8px 0 0;font-size:13px;opacity:.75;max-width:560px}.view-tabs{display:flex;gap:8px}.view-tabs button{border:1px solid rgba(255,255,255,.25);background:transparent;color:#fffc;padding:10px 18px;border-radius:8px;cursor:pointer;font-size:13px;font-weight:500}.view-tabs button.active{background:var(--white);color:var(--teal);border-color:var(--white);font-weight:600}.loading{padding:48px;text-align:center;color:var(--slate)}.loading.error{color:var(--red)}.explorer-layout{display:grid;grid-template-columns:300px 1fr;min-height:calc(100vh - 120px)}.sidebar{background:var(--white);border-right:1px solid var(--border);padding:20px 16px;overflow-y:auto}.sidebar-section+.sidebar-section{margin-top:24px}.sidebar h4{margin:0 0 12px;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--slate);display:flex;align-items:center;gap:6px}.schema-table{margin-bottom:8px;border:1px solid var(--border);border-radius:8px;overflow:hidden}.schema-table summary{cursor:pointer;padding:8px 10px;font-size:13px;display:flex;justify-content:space-between;align-items:center;background:var(--bg)}.table-name{font-weight:600;font-family:ui-monospace,monospace}.table-meta{font-size:11px;color:var(--slate)}.schema-table ul{margin:0;padding:8px 10px 10px;list-style:none}.schema-table li{display:flex;justify-content:space-between;font-size:12px;padding:3px 0;color:var(--slate)}.schema-table code{color:var(--navy)}.query-list{display:flex;flex-direction:column;gap:6px}.query-item{display:flex;gap:8px;align-items:flex-start;text-align:left;border:1px solid var(--border);background:var(--white);border-radius:8px;padding:10px;cursor:pointer;transition:border-color .15s,background .15s}.query-item:hover{border-color:var(--teal)}.query-item.active{border-color:var(--teal);background:#0e749010}.query-item strong{display:block;font-size:13px;color:var(--navy);margin-bottom:2px}.query-item span{font-size:11px;color:var(--slate);line-height:1.4}.explorer-main{padding:24px;overflow-x:auto}.kpi-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}.kpi-card{background:var(--white);border-radius:12px;padding:16px 20px;box-shadow:0 1px 3px #0000000f}.kpi-label{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--slate);margin-bottom:6px}.kpi-value{font-size:28px;font-weight:700;color:var(--navy)}.accent-amber{color:var(--amber)}.accent-green{color:var(--green)}.chart-card{background:var(--white);border-radius:12px;padding:20px 24px;margin-bottom:20px;box-shadow:0 1px 3px #0000000f}.chart-card h3{margin:0;font-size:16px}.chart-sub{margin:4px 0 16px;font-size:12px;color:var(--slate)}.legend{display:flex;gap:16px;margin-top:12px;font-size:12px;color:var(--slate)}.legend .dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:4px}.dot.amber{background:var(--amber)}.dot.teal{background:var(--teal)}.dot.green{background:var(--green)}.sql-editor{background:var(--white);border-radius:12px;overflow:hidden;margin-bottom:16px;box-shadow:0 1px 3px #0000000f}.sql-toolbar{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;border-bottom:1px solid var(--border);background:var(--bg)}.sql-label{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--slate)}.sql-actions{display:flex;gap:8px}.btn-primary,.btn-ghost{display:inline-flex;align-items:center;gap:6px;border:none;border-radius:8px;padding:8px 14px;font-size:13px;cursor:pointer;font-weight:500}.btn-primary{background:var(--teal);color:var(--white)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-ghost{background:var(--white);color:var(--slate);border:1px solid var(--border)}.sql-editor textarea{width:100%;min-height:180px;border:none;padding:16px;font-family:ui-monospace,Cascadia Code,SF Mono,monospace;font-size:13px;line-height:1.5;resize:vertical;background:#1e293b;color:#e2e8f0}.results-panel{background:var(--white);border-radius:12px;padding:16px;box-shadow:0 1px 3px #0000000f}.results-panel.empty{color:var(--slate);font-size:14px;text-align:center;padding:32px}.results-panel.error{border:1px solid #fecaca;background:#fef2f2;color:var(--red)}.results-panel.error pre{margin:8px 0 0;white-space:pre-wrap;font-size:13px}.results-meta{display:flex;gap:16px;font-size:12px;color:var(--slate);margin-bottom:12px}.results-meta span{display:inline-flex;align-items:center;gap:4px}.table-wrap{overflow-x:auto;max-height:420px;overflow-y:auto}table{width:100%;border-collapse:collapse;font-size:13px}th{position:sticky;top:0;background:var(--bg);text-align:left;padding:10px 12px;font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:var(--navy);border-bottom:2px solid var(--navy)}td{padding:9px 12px;border-bottom:1px solid var(--border)}tr:nth-child(2n) td{background:#f8fafc}.hhi-high{color:var(--amber);font-weight:600}.hhi-mid{color:var(--teal);font-weight:600}.hhi-low{color:var(--green);font-weight:600}.badge-specialised{color:var(--amber);font-weight:600}.badge-mixed{color:var(--teal);font-weight:600}.badge-diverse{color:var(--green);font-weight:600}@media(max-width:960px){.explorer-layout{grid-template-columns:1fr}.sidebar{border-right:none;border-bottom:1px solid var(--border)}.kpi-row{grid-template-columns:1fr 1fr}}