:root {
  --bg: #f6f7f9; --card: #ffffff; --fg: #1b1f27; --muted: #6b7280; --line: #e3e6ea;
  --pos: #117a3a; --neg: #c0262c; --warn: #b45309; --accent: #2457c5; --accent-bg: #e8effc;
  --chart-grid: #eceff3; --up: #1a9c5a; --down: #d6333a;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1218; --card: #171b23; --fg: #e6e8ee; --muted: #9aa3b2; --line: #2a303b;
    --pos: #3ecf7c; --neg: #ff6b6b; --warn: #f5b74c; --accent: #7aa2ff; --accent-bg: #1d2740;
    --chart-grid: #222837; --up: #3ecf7c; --down: #ff6b6b;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1218; --card: #171b23; --fg: #e6e8ee; --muted: #9aa3b2; --line: #2a303b;
  --pos: #3ecf7c; --neg: #ff6b6b; --warn: #f5b74c; --accent: #7aa2ff; --accent-bg: #1d2740;
  --chart-grid: #222837; --up: #3ecf7c; --down: #ff6b6b;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { background: var(--bg); color: var(--fg); font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); text-decoration: none; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.pos { color: var(--pos); }
.neg { color: var(--neg); }
.warn { color: var(--warn); }
.banner { background: var(--warn); color: #111; text-align: center; font-weight: 600; font-size: 12.5px; padding: 3px 16px; letter-spacing: .3px; }
.top { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 12px; padding: 8px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.top .brand { color: var(--fg); font-weight: 700; font-size: 17px; white-space: nowrap; }
.top .v { color: var(--accent); font-weight: 600; margin-left: 2px; }
.top nav a { margin-left: 10px; }
.top .spacer { flex: 1; }
.container { max-width: 1240px; margin: 0 auto; padding: 16px; }
footer.container { padding-top: 0; padding-bottom: 24px; }
.btn { background: var(--card); color: var(--fg); border: 1px solid var(--line); border-radius: 8px; padding: 7px 12px; font: inherit; cursor: pointer; }
.btn.small { padding: 3px 9px; font-size: 13px; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn:hover { border-color: var(--accent); }
select, input { background: var(--card); color: var(--fg); border: 1px solid var(--line); border-radius: 8px; padding: 6px 9px; font: inherit; }
label { font-size: 12.5px; color: var(--muted); margin-right: 6px; }
h1 { font-size: 21px; margin: 4px 0 12px; }
h2 { font-size: 16px; margin: 20px 0 8px; display: flex; align-items: center; gap: 8px; }
h2 .cnt { font-weight: 400; color: var(--muted); font-size: 13px; }

/* engine strip */
.strip { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 9px 14px; margin-bottom: 14px; font-size: 13.5px; }
.strip .dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: var(--muted); margin-right: 6px; vertical-align: middle; }
.strip .dot.on { background: var(--pos); }
.strip .dot.off { background: var(--neg); }
.strip .dot.warn { background: var(--warn); }
.badge { display: inline-block; background: var(--accent-bg); color: var(--accent); border-radius: 999px; padding: 1px 9px; font-size: 12px; font-weight: 600; }
.badge.neg { background: color-mix(in srgb, var(--neg) 15%, transparent); color: var(--neg); }

/* cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.card.book { cursor: pointer; transition: border-color .15s; display: block; color: inherit; }
.card.book:hover { border-color: var(--accent); }
.card .title { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 16px; margin-bottom: 8px; }
.card .title .hb { margin-left: auto; font-weight: 400; font-size: 12px; color: var(--muted); }
.kv { display: grid; grid-template-columns: 1fr auto; gap: 3px 10px; font-size: 14px; }
.kv .k { color: var(--muted); }
.kv .v { text-align: right; font-variant-numeric: tabular-nums; }
.money { font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; }
.maxloss { font-size: 20px; font-weight: 700; color: var(--neg); font-variant-numeric: tabular-nums; }
.twins { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 6px 0 10px; }
.twins .lbl { font-size: 11.5px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
.card .foot { margin-top: 8px; font-size: 12.5px; color: var(--muted); display: flex; gap: 12px; flex-wrap: wrap; }

/* book page */
.head { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: flex-end; }
.head .stat .lbl { font-size: 11.5px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
.head .stat .val { font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; }
.charts { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 14px; }
.chart { height: 300px; width: 100%; }
.chart-tools { display: flex; gap: 8px; align-items: center; margin-bottom: 6px; flex-wrap: wrap; font-size: 13px; }
.tbl-wrap { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
th, td { padding: 7px 10px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .3px; position: sticky; top: 0; background: var(--card); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.legs { white-space: normal; max-width: 360px; }
tr:last-child td { border-bottom: none; }
details { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; margin-top: 12px; }
details pre { white-space: pre-wrap; word-break: break-word; font-size: 12px; margin: 8px 0 0; }
.empty { padding: 14px; color: var(--muted); }
.login .card { max-width: 420px; display: flex; flex-direction: column; gap: 10px; }
.login input { font-size: 20px; letter-spacing: 6px; text-align: center; width: 100%; }
@media (max-width: 760px) {
  .charts { grid-template-columns: 1fr; }
  .head .stat .val { font-size: 19px; }
  .money, .maxloss { font-size: 18px; }
  .top nav { display: none; }
}