:root {
  --bg: #0b0f17;
  --panel: #131a26;
  --panel-2: #1a2333;
  --border: #24304a;
  --text: #e6ecf5;
  --muted: #8b97ad;
  --accent: #4f8cff;
  --green: #2ecc71;
  --red: #ff5c69;
  --amber: #f0b90b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden { display: none !important; }
.muted { color: var(--muted); font-size: 0.85rem; }

.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
  width: 100%;
  max-width: 400px;
}

.brand {
  margin: 0;
  font-size: 2rem;
  letter-spacing: 1px;
  color: var(--accent);
}
.brand.small { font-size: 1.2rem; color: var(--accent); white-space: nowrap; }

.subtitle { color: var(--muted); margin-top: 4px; }

.tabs-mini {
  display: flex;
  gap: 8px;
  margin: 18px 0;
}
.tabs-mini button {
  flex: 1;
  padding: 8px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
  cursor: pointer;
}
.tabs-mini button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

label {
  display: block;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.85rem;
}

input[type="text"], input[type="password"], input[type="number"], select {
  width: 100%;
  margin-top: 4px;
  padding: 10px 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }

.checkbox { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: 0.88rem; }
.checkbox input { width: auto; }

.btn {
  padding: 10px 16px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.success { background: var(--green); color: #04120a; }
.btn.danger { background: var(--red); color: #fff; }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--muted); }
.btn.full { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar nav { display: flex; gap: 6px; flex: 1; }
.tab-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 0.95rem;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
}
.tab-btn.active { background: var(--panel-2); color: var(--text); }

main { max-width: 1100px; margin: 0 auto; padding: 24px 16px 60px; }

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}
.grid-cards.four { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 16px;
}
.card.narrow { max-width: 520px; }
.card h3 { margin: 0 0 12px; font-size: 1rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }

.card.metric { display: flex; flex-direction: column; gap: 6px; }
.metric-label { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; }
.card.metric b { font-size: 1.4rem; }

.status-row { display: flex; gap: 8px; align-items: center; margin-bottom: 14px; }
.badge {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
}
.badge.on { background: rgba(46, 204, 113, 0.15); color: var(--green); }
.badge.off { background: rgba(139, 151, 173, 0.15); color: var(--muted); }
.badge.testnet { background: rgba(240, 185, 11, 0.15); color: var(--amber); }

.btn-row { display: flex; gap: 10px; }

.kv { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px dashed var(--border); font-size: 0.92rem; }
.kv:last-child { border-bottom: none; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.form-grid .span2 { grid-column: span 2; }

table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.5px; }
td.num { font-variant-numeric: tabular-nums; }

.pos-buy { color: var(--green); font-weight: 700; }
.pos-sell { color: var(--red); font-weight: 700; }
.pnl-pos { color: var(--green); }
.pnl-neg { color: var(--red); }

.error-msg { color: var(--red); font-size: 0.85rem; min-height: 18px; margin: 8px 0 0; }
.ok-msg { color: var(--green); font-size: 0.85rem; margin-left: 10px; }

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.78rem;
  padding: 20px;
  border-top: 1px solid var(--border);
  max-width: 800px;
  margin: 0 auto;
}

ol.guide { padding-left: 20px; line-height: 1.8; }
ol.guide li { margin-bottom: 6px; }
.step { margin-top: 10px; }

canvas { width: 100%; }

@media (max-width: 720px) {
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .span2 { grid-column: span 1; }
  .topbar { flex-wrap: wrap; gap: 10px; }
}