:root {
  --ink: #1c2430; --muted: #5c6a7d; --line: #dde3ea;
  --bg: #f7f9fb; --card: #ffffff; --accent: #1f5eff;
  --ok: #0a7a3d; --warn: #b23c17; --paper: #7a5d0a;
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
       color: var(--ink); background: var(--bg); }
header { background: var(--card); border-bottom: 1px solid var(--line); }
nav { max-width: 960px; margin: 0 auto; padding: 0.7rem 1rem;
      display: flex; gap: 1.2rem; align-items: center; }
.brand { font-weight: 700; margin-right: auto; }
nav a { color: var(--ink); text-decoration: none; }
nav a:hover { color: var(--accent); }
main { max-width: 960px; margin: 1.5rem auto; padding: 0 1rem; }
footer { max-width: 960px; margin: 2rem auto 1rem; padding: 1rem;
         color: var(--muted); font-size: 0.85rem; border-top: 1px solid var(--line); }
h1 { font-size: 1.5rem; } h2 { font-size: 1.15rem; }
.card { background: var(--card); border: 1px solid var(--line);
        border-radius: 8px; padding: 1rem 1.25rem; margin-bottom: 1rem; }
.error { background: #fdeeea; border: 1px solid #f0c4b8; color: var(--warn);
         padding: 0.6rem 0.9rem; border-radius: 6px; }
.notice { background: #eef4ff; border: 1px solid #c9d8f8;
          padding: 0.6rem 0.9rem; border-radius: 6px; }
label { display: block; margin-top: 0.8rem; font-weight: 600; font-size: 0.9rem; }
input[type=text], input[type=email], input[type=password], input[type=number] {
  width: 100%; max-width: 26rem; padding: 0.45rem 0.6rem; margin-top: 0.2rem;
  border: 1px solid var(--line); border-radius: 6px; font-size: 1rem; }
button { margin-top: 1rem; padding: 0.5rem 1.1rem; border: 0; border-radius: 6px;
         background: var(--accent); color: #fff; font-size: 1rem; cursor: pointer; }
button.danger { background: var(--warn); }
button.linklike { background: none; color: var(--ink); padding: 0; margin: 0;
                  font-size: 1rem; }
button.linklike:hover { color: var(--accent); }
form.inline { display: inline; }
.badge { display: inline-block; padding: 0.1rem 0.5rem; border-radius: 99px;
         font-size: 0.75rem; font-weight: 700; }
.badge.paper { background: #fdf6df; color: var(--paper); }
.badge.live { background: #fdeeea; color: var(--warn); }
.badge.paused { background: #eceff3; color: var(--muted); }
.badge.running { background: #e7f6ec; color: var(--ok); }
table { width: 100%; border-collapse: collapse; margin-top: 0.5rem; }
th, td { text-align: left; padding: 0.35rem 0.5rem; border-bottom: 1px solid var(--line);
         font-size: 0.92rem; }
th { color: var(--muted); font-weight: 600; }
.feed { list-style: none; padding: 0; margin: 0.5rem 0 0; }
.feed li { padding: 0.35rem 0; border-bottom: 1px solid var(--line);
           font-size: 0.92rem; }
.feed .ts { color: var(--muted); font-size: 0.8rem; margin-right: 0.5rem; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, monospace; word-break: break-all;
        background: var(--bg); padding: 0.4rem 0.6rem; border-radius: 6px;
        display: block; margin: 0.4rem 0; }
.pnl-pos { color: var(--ok); } .pnl-neg { color: var(--warn); }
.presets { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
           gap: 1rem; }
.warnbox { background: #fdf6df; border: 1px solid #ecd9a0; padding: 0.6rem 0.9rem;
           border-radius: 6px; font-size: 0.9rem; }
textarea { width: 100%; max-width: 34rem; padding: 0.45rem 0.6rem;
           margin-top: 0.2rem; border: 1px solid var(--line);
           border-radius: 6px; font-family: ui-monospace, monospace;
           font-size: 0.85rem; }
/* Recovery codes: shown once, so they must be easy to read and copy. */
.codes { list-style: none; padding: 0; margin: 1rem 0;
         display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
         gap: 0.4rem; }
.codes li { font-family: ui-monospace, monospace; letter-spacing: 0.06em;
            background: var(--bg); border: 1px solid var(--line);
            padding: 0.45rem 0.6rem; border-radius: 6px; }

.brand-logo { height: 26px; vertical-align: middle; margin-right: 6px; }