:root {
  --ink: #0b0b0b; --bg: #f5f6f8; --card: #fff; --line: #e4e6eb; --muted: #6b6f7a;
  --accent: #0953ff; --danger: #c62828; --ok: #2e7d32; --radius: 10px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Inter, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--ink); line-height: 1.5; }
h1 { font-size: 24px; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 0 0 12px; }
.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 12px 20px; background: var(--card); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 18px; }
.brand span { color: var(--accent); }
.session { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.tenant { font-weight: 600; }
.wrap { max-width: 1000px; margin: 24px auto; padding: 0 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.narrow { max-width: 420px; margin: 40px auto; }
.muted { color: var(--muted); }
label { display: block; margin: 12px 0; font-weight: 500; }
input, select { display: block; width: 100%; margin-top: 4px; padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; }
.session select { width: auto; margin: 0; }
.btn { display: inline-block; padding: 9px 16px; border: 0; border-radius: 8px; background: var(--accent); color: #fff; font: inherit; font-weight: 600; cursor: pointer; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn.danger { background: var(--danger); }
.btn.small { padding: 4px 10px; font-size: 13px; }
.msg { min-height: 1.5em; }
.msg.error { color: var(--danger); }
.msg.ok { color: var(--ok); }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 16px; overflow-x: auto; }
.tabs button { background: none; border: 0; border-bottom: 2px solid transparent; padding: 10px 14px; font: inherit; cursor: pointer; color: var(--muted); white-space: nowrap; }
.tabs button.active { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: 13px; color: var(--muted); font-weight: 600; }
td select { width: auto; margin: 0; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: flex-end; }
.row label { flex: 1 1 180px; margin: 0; }
.table-scroll { overflow-x: auto; }
@media (max-width: 600px) { .wrap { margin: 12px auto; } .card { padding: 14px; } }