:root {
  --bg: #0a0e1a;
  --bg-2: #121826;
  --bg-3: #1a2233;
  --border: #25304a;
  --text: #e7ecf3;
  --muted: #8a94a8;
  --accent: #7c5cff;
  --accent-2: #4ad6c4;
  --green: #4ade80;
  --red: #f87171;
  --orange: #fbbf24;
  --mono: "JetBrains Mono", "Fira Code", "SF Mono", Consolas, Menlo, monospace;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

.mono { font-family: var(--mono); }
.break { word-break: break-all; }
.err { color: var(--red); }

/* ---- topbar ---- */
.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 600; letter-spacing: 0.5px; color: var(--accent-2); }
.tabs { display: flex; gap: 4px; }
.tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--text);
  background: var(--bg-3);
  border-color: var(--border);
}
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
}
.ghost:hover { color: var(--text); }

.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot-green { background: var(--green); box-shadow: 0 0 8px var(--green); }
.dot-red { background: var(--red); }
.dot-grey { background: var(--muted); }
.dot-orange { background: var(--orange); }

main { padding: 24px; max-width: 1400px; margin: 0 auto; }

/* ---- cards ---- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
}
.card-label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.6px; }
.card-value { font-size: 28px; font-weight: 600; margin-top: 6px; }
.card-sub { color: var(--muted); font-size: 12px; margin-top: 4px; }

/* ---- blocks ---- */
.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}
.block {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}
.block h3 { margin: 0 0 12px; font-size: 14px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.6px; }
.block h4 { margin: 16px 0 6px; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.6px; }
.kv {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border);
}
.kv:last-child { border-bottom: none; }
.kv span { color: var(--muted); }
.kv code { color: var(--text); text-align: right; }

/* ---- operations ---- */
.ops { display: flex; flex-wrap: wrap; gap: 8px; }
.op {
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
}
.op:hover { border-color: var(--accent); }
.op.danger { color: #fff; background: #471c1c; border-color: #6b2929; }
.op.danger:hover { background: #5e2424; border-color: var(--red); }
.op:disabled { opacity: 0.5; cursor: not-allowed; }
.hint { color: var(--muted); font-size: 12px; margin-top: 12px; }
.hint.warn {
  color: var(--orange);
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.3);
  padding: 10px 14px; border-radius: 6px;
}
.kv a { color: var(--accent-2); text-decoration: none; }
.kv a:hover { text-decoration: underline; }
button.small { padding: 4px 10px; font-size: 12px; }
button.danger-text { color: var(--red); background: transparent; border: 1px solid rgba(248, 113, 113, 0.4); }
button.danger-text:hover { background: rgba(248, 113, 113, 0.1); }

.range-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}
.range-grid label {
  display: flex; flex-direction: column; gap: 4px;
  color: var(--muted); font-size: 12px;
}
.range-grid input {
  background: var(--bg-3); border: 1px solid var(--border);
  color: var(--text); border-radius: 6px; padding: 8px 10px;
  font: inherit; font-family: var(--mono);
}
.range-grid input:focus { outline: none; border-color: var(--accent); }

/* ---- grid table ---- */
.grid-block { overflow-x: auto; }
.grid-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.grid-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 13px;
}
.grid-table th, .grid-table td {
  padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.grid-table th { color: var(--muted); font-weight: 500; text-transform: uppercase; font-size: 11px; letter-spacing: 0.4px; }
.grid-table td.right, .grid-table th.right { text-align: right; }
.grid-table tr.cur { background: rgba(124, 92, 255, 0.08); }
.tag {
  display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11px;
  font-weight: 600; text-transform: uppercase; letter-spacing: 0.4px;
}
.tag-buy { background: rgba(74, 222, 128, 0.12); color: var(--green); }
.tag-sell { background: rgba(248, 113, 113, 0.12); color: var(--red); }
.tag-none { background: rgba(138, 148, 168, 0.12); color: var(--muted); }

/* ---- forms ---- */
.config-form fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 0 0 16px;
  padding: 14px 18px;
}
.config-form legend { color: var(--muted); text-transform: uppercase; font-size: 11px; letter-spacing: 0.6px; padding: 0 6px; }
.config-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--muted);
}
.config-form label.check { flex-direction: row; align-items: center; gap: 8px; color: var(--text); }
.config-form input, .config-form select {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 8px 10px;
  font: inherit;
  font-family: var(--mono);
}
.config-form input:focus, .config-form select:focus { outline: none; border-color: var(--accent); }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.config-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.config-form button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
  font-weight: 500;
}
.config-form button.danger { background: #471c1c; border: 1px solid #6b2929; }
.config-form button.danger:hover { background: #5e2424; border-color: var(--red); }
.config-status { color: var(--muted); }

/* ---- logs ---- */
.logs-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.logs-controls { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.logs-controls input[type="number"] {
  width: 80px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 6px 8px;
  font: inherit;
  font-family: var(--mono);
}
.logs-controls button {
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
}
.logs {
  background: #06080f;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  max-height: 380px;
  overflow: auto;
  font-size: 12px;
  white-space: pre;
  line-height: 1.45;
}

/* ---- toast ---- */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--bg-3);
  border: 1px solid var(--border);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  z-index: 100;
}
.toast.ok { border-color: var(--green); }
.toast.err { border-color: var(--red); color: var(--red); }

/* ---- chart ---- */
.chart-block { margin-bottom: 16px; }
.chart-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 12px; gap: 12px; flex-wrap: wrap; }
.chart-header h3 { margin: 0; }
.chart-meta { color: var(--muted); font-size: 12px; font-weight: normal; margin-left: 8px; }
.chart-controls { display: flex; gap: 4px; }
.chip {
  background: var(--bg-3);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
}
.chip:hover { color: var(--text); }
.chip.active { color: var(--text); background: rgba(124, 92, 255, 0.15); border-color: var(--accent); }
#price-chart { display: block; width: 100%; height: 220px; background: #06080f; border-radius: 6px; }
#profit-chart { display: block; width: 100%; height: 180px; background: #06080f; border-radius: 6px; }
a.ghost { text-decoration: none; display: inline-flex; align-items: center; padding: 6px 14px; }
#daily-pnl-chart { display: block; width: 100%; height: 200px; background: #06080f; border-radius: 6px; }

/* per-level heat bar */
.heat-cell { width: 200px; }
.heat-bar { display: inline-block; height: 10px; background: linear-gradient(90deg, #4ade80, #fbbf24, #f87171); border-radius: 2px; vertical-align: middle; }

/* ---- trades ---- */
.trades-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; flex-wrap: wrap; gap: 12px; }
.trades-header h3 { margin: 0; }
.empty { color: var(--muted); text-align: center; padding: 32px; font-style: italic; }
.profit-pos { color: var(--green); }
.profit-neg { color: var(--red); }

/* ---- check rows ---- */
.check-row { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---- textarea ---- */
.config-form textarea {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 8px 10px;
  font: inherit;
  font-family: var(--mono);
  resize: vertical;
}
.config-form textarea:focus { outline: none; border-color: var(--accent); }

/* ---- modal ---- */
/* IMPORTANT: any rule with display:* would override the HTML5 [hidden]
   attribute, leaving an invisible backdrop that swallows all clicks.
   The [hidden] selector below pins display:none with higher specificity. */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; backdrop-filter: blur(2px);
}
.modal-backdrop[hidden] { display: none; }
.modal {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 28px;
  max-width: 480px;
  width: 92%;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
}
.modal h4 { margin: 0 0 8px; font-size: 16px; color: var(--text); }
.modal p { color: var(--muted); margin: 0 0 18px; white-space: pre-line; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; }

/* ---- keyboard hint banner ---- */
.kbhint {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--bg-3); border: 1px solid var(--border);
  padding: 10px 18px; border-radius: 8px; font-size: 12px;
  color: var(--muted); z-index: 90;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.kbhint kbd {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 1px 6px; border-radius: 4px;
  font-family: var(--mono); font-size: 11px;
  color: var(--text); margin: 0 1px;
}

/* ---- password toggle ---- */
.password-wrap { position: relative; }
.password-wrap input { width: 100%; padding-right: 36px; }
.password-wrap button {
  position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  background: transparent; border: none; color: var(--muted);
  cursor: pointer; padding: 6px 10px; font-size: 16px;
}
.password-wrap button:hover { color: var(--text); }

/* ---- responsive (mobile) ---- */
@media (max-width: 720px) {
  .topbar { flex-wrap: wrap; padding: 10px 14px; gap: 10px; }
  .tabs { order: 3; width: 100%; overflow-x: auto; }
  .tab { padding: 6px 10px; font-size: 13px; flex-shrink: 0; }
  .topbar-right { order: 2; margin-left: auto; }
  main { padding: 14px; }
  .cards { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
  .card { padding: 12px 14px; }
  .card-value { font-size: 20px; }
  .block { padding: 14px; }
  .row { grid-template-columns: 1fr; }
  .grid2 { grid-template-columns: 1fr; }
  .grid-table { font-size: 12px; }
  .grid-table th, .grid-table td { padding: 5px 8px; }
  .config-actions { flex-direction: column; align-items: stretch; }
  .config-actions button { width: 100%; }
  #price-chart { height: 180px; }
  #profit-chart { height: 140px; }
}

/* ---- login ---- */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 36px 36px 32px;
  width: min(380px, 92vw);
}
.login-logo { font-size: 20px; font-weight: 600; color: var(--accent-2); margin-bottom: 4px; }
.login-sub { color: var(--muted); font-size: 12px; margin-bottom: 24px; }
.login-form { display: flex; flex-direction: column; gap: 14px; }
.login-form label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.login-form input {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 10px 12px;
  font: inherit;
}
.login-form input:focus { outline: none; border-color: var(--accent); }
.login-form button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 11px;
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
  font-weight: 500;
}
.login-error { color: var(--red); font-size: 12px; min-height: 16px; }