:root {
  color-scheme: light;
  --bg: #f5f7f9;
  --ink: #17202a;
  --muted: #667085;
  --line: #d9e0e7;
  --panel: #ffffff;
  --green: #147d4f;
  --amber: #9a6700;
  --red: #b42318;
  --blue: #155eef;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

h1, h2, p { margin: 0; }
h1 { font-size: 28px; letter-spacing: 0; }
h2 { font-size: 18px; margin-bottom: 12px; }
main { width: min(1120px, 100%); margin: 0 auto; padding: 16px; }
section { margin-bottom: 18px; }

.actions, .range-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

button, a {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  font-weight: 700;
  padding: 10px 14px;
  text-align: center;
  text-decoration: none;
}

.start, .primary { background: var(--green); color: white; border-color: var(--green); }
.danger { background: var(--red); color: white; border-color: var(--red); }
.warn { background: var(--amber); color: white; border-color: var(--amber); }
.ghost { background: transparent; }
.hidden { display: none; }
.muted { color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.card, .position, .session, .history, .panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}
.card label { display: block; color: var(--muted); font-size: 12px; }
.card strong { display: block; font-size: 18px; margin-top: 4px; overflow-wrap: anywhere; }
.ok strong { color: var(--green); }
.warn-card strong { color: var(--amber); }
.bad strong { color: var(--red); }

.positions {
  display: grid;
  gap: 10px;
}
.position-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 8px;
}
.profit { color: var(--green); }
.loss { color: var(--red); }

.logs {
  max-height: 360px;
  overflow: auto;
  background: #101828;
  color: #e4e7ec;
  border-radius: 8px;
  padding: 12px;
  white-space: pre-wrap;
}

.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
}
.login .panel { width: min(420px, calc(100vw - 32px)); }
label { display: grid; gap: 6px; margin-top: 12px; font-weight: 700; }
input { min-height: 44px; border: 1px solid var(--line); border-radius: 8px; padding: 10px; }

dialog {
  border: 0;
  border-radius: 8px;
  width: min(420px, calc(100vw - 32px));
  padding: 18px;
}
.dialog-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 18px; }

@media (min-width: 760px) {
  .actions { grid-template-columns: 2fr repeat(4, 1fr); }
  .range-row { grid-template-columns: repeat(4, 1fr); }
  .grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .positions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}