:root{--bg:#f6f7fb;--card:#fff;--text:#1b1f29;--muted:#6b7280;--line:#e5e7eb;--primary:#111827;--ok:#16a34a;--err:#dc2626;--warn:#d97706}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}a{color:inherit}.app{display:flex;min-height:100vh}.side{width:250px;background:#111827;color:white;padding:22px 16px;position:fixed;top:0;bottom:0}.brand{font-weight:800;font-size:22px;margin-bottom:26px}.nav a{display:block;color:#d1d5db;text-decoration:none;padding:11px 12px;border-radius:12px;margin:4px 0}.nav a:hover,.nav a.active{background:#1f2937;color:white}.main{margin-left:250px;padding:28px;width:calc(100% - 250px)}.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 8px 24px rgba(17,24,39,.04);margin-bottom:18px}.grid{display:grid;gap:16px}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.kpi .n{font-size:28px;font-weight:800}.muted{color:var(--muted)}table{width:100%;border-collapse:collapse;background:white}th,td{text-align:left;padding:11px 10px;border-bottom:1px solid var(--line);vertical-align:top}th{font-size:13px;color:#4b5563;background:#fafafa}.btn{display:inline-block;border:0;background:#111827;color:white;padding:9px 13px;border-radius:10px;text-decoration:none;cursor:pointer;font-weight:600}.btn.secondary{background:#e5e7eb;color:#111827}.btn.danger{background:#dc2626}.btn.ok{background:#16a34a}.badge{display:inline-block;border-radius:999px;padding:3px 8px;font-size:12px;font-weight:700}.badge.ok{background:#dcfce7;color:#166534}.badge.err{background:#fee2e2;color:#991b1b}.badge.warn{background:#fef3c7;color:#92400e}input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:white}label{font-weight:700;font-size:13px;display:block;margin:10px 0 6px}.actions{display:flex;gap:8px;flex-wrap:wrap}.alert{padding:12px 14px;border-radius:12px;margin-bottom:16px}.alert.ok{background:#dcfce7;color:#166534}.alert.err{background:#fee2e2;color:#991b1b}.alert.warn{background:#fef3c7;color:#92400e}pre{white-space:pre-wrap;overflow:auto;background:#111827;color:#f9fafb;border-radius:14px;padding:14px;font-size:12px}.login{display:flex;align-items:center;justify-content:center;min-height:100vh}.login .card{width:390px}@media(max-width:900px){.side{position:static;width:100%;height:auto}.app{display:block}.main{margin-left:0;width:100%;padding:18px}.grid-4,.grid-2{grid-template-columns:1fr}}

.filters-actions{display:flex;gap:10px;align-items:end}.nowrap{white-space:nowrap}.text-small{font-size:13px}.truncate{max-width:360px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.session-header{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.metric{background:#f9fafb;border:1px solid var(--line);border-radius:14px;padding:12px}.metric .label{font-size:12px;color:var(--muted);font-weight:700}.metric .value{font-size:20px;font-weight:800;margin-top:4px}.chat-wrap{display:flex;flex-direction:column;gap:14px}.bubble-row{display:flex}.bubble-row.user{justify-content:flex-start}.bubble-row.assistant{justify-content:flex-end}.bubble{max-width:76%;border:1px solid var(--line);border-radius:18px;padding:14px 15px;line-height:1.45;white-space:pre-wrap}.bubble.user{background:#fff}.bubble.assistant{background:#eef2ff;border-color:#c7d2fe}.bubble.system{background:#fef3c7;border-color:#fde68a}.bubble-meta{font-size:12px;color:var(--muted);margin-bottom:6px;font-weight:700}.bubble-cost{font-size:12px;color:var(--muted);margin-top:8px;border-top:1px solid rgba(0,0,0,.08);padding-top:7px}.pill{display:inline-block;padding:4px 8px;border-radius:999px;background:#f3f4f6;font-size:12px;font-weight:700;color:#374151}.subnav{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}.subnav a{padding:9px 12px;border-radius:10px;background:#e5e7eb;text-decoration:none;font-weight:700}.subnav a.active{background:#111827;color:white}@media(max-width:900px){.session-header{grid-template-columns:1fr}.bubble{max-width:100%}}

/* Cost split dashboard */
.primary-kpi{border-color:#c7d2fe;background:linear-gradient(180deg,#ffffff,#eef2ff)}
.warn-kpi{border-color:#fde68a;background:linear-gradient(180deg,#ffffff,#fffbeb)}
.explanation{background:#f8fafc;border-left:4px solid #111827;line-height:1.55}
.explanation code{background:#e5e7eb;border-radius:6px;padding:2px 5px;font-size:12px}
.bar-list{display:flex;flex-direction:column;gap:10px;margin-top:12px}.bar-row{display:grid;grid-template-columns:105px 1fr 120px;gap:10px;align-items:center}.bar-label{font-size:13px;color:#4b5563;font-weight:700}.bar-track{height:13px;background:#e5e7eb;border-radius:999px;overflow:hidden}.bar-fill{height:100%;background:#111827;border-radius:999px;min-width:3px}.bar-fill.danger{background:#dc2626}.bar-value{text-align:right;font-size:13px;font-weight:800}.card h2{margin-top:0}.card small{color:var(--muted)}.card small a{color:#92400e;font-weight:800}.table-note{font-size:13px;color:var(--muted);line-height:1.45}.pill{word-break:break-all}@media(max-width:900px){.bar-row{grid-template-columns:1fr}.bar-value{text-align:left}.bar-track{height:10px}}

.billing-kpi{border-color:#bbf7d0;background:linear-gradient(180deg,#ffffff,#f0fdf4)}
.mini-progress{height:8px;background:#e5e7eb;border-radius:999px;overflow:hidden;margin-top:8px}.mini-progress span{display:block;height:100%;background:#111827;border-radius:999px;min-width:2px}