/* ════════════════════════════════════════════
   QuantChain · Design System
   ════════════════════════════════════════════ */

:root {
  --bg:          #0E0F11;
  --bg-2:        #15171A;
  --bg-3:        #1C1F24;
  --border:      rgba(255,255,255,.07);
  --border-2:    rgba(255,255,255,.12);
  --text:        #E8E6E0;
  --text-2:      #9A9690;
  --text-3:      #5E5C58;
  --green:       #1D9E75;
  --green-dim:   rgba(29,158,117,.15);
  --blue:        #378ADD;
  --amber:       #EF9F27;
  --red:         #D85A30;
  --red-dim:     rgba(216,90,48,.15);
  --purple:      #7F77DD;
  --sidebar-w:   210px;
  --radius:      8px;
  --radius-sm:   5px;
  --font-mono:   'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
}

/* ── Layout ─────────────────────────────────── */
body { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-2);
  border-right: .5px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
}

.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page-body {
  flex: 1;
  padding: 20px 24px 32px;
  overflow-y: auto;
}


/* ── Demo mode notice ───────────────────────── */
.demo-banner {
  display:flex;
  align-items:flex-start;
  gap:10px;
  margin:0 0 16px;
  padding:10px 12px;
  border:.5px solid rgba(239,159,39,.35);
  background:rgba(239,159,39,.10);
  color:#F5BC64;
  border-radius:var(--radius);
  font-size:12px;
  line-height:1.5;
}
.demo-banner strong {
  flex-shrink:0;
  color:#FFD28A;
  letter-spacing:.08em;
}
.demo-banner span { color:#E8D7B0; }
.demo-note {
  margin-top:8px;
  color:#F5BC64;
  font-size:11px;
}

/* ── Sidebar ─────────────────────────────────── */
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 18px 16px;
  border-bottom: .5px solid var(--border);
  letter-spacing: .08em;
  font-size: 12px;
  font-weight: 600;
}

.logo-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
}

.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  text-decoration: none;
  font-size: 12px;
  transition: background .15s, color .15s;
}
.nav-item:hover { background: var(--bg-3); color: var(--text); }
.nav-item.active {
  background: var(--green-dim);
  color: var(--green);
  border: .5px solid rgba(29,158,117,.25);
}
.nav-icon { font-size: 14px; width: 18px; text-align: center; }
.nav-label { flex: 1; }

.sidebar-footer {
  padding: 14px 16px;
  border-top: .5px solid var(--border);
  font-size: 10px;
  color: var(--text-3);
  letter-spacing: .06em;
}
.chain-status { display: flex; align-items: center; gap: 6px; margin-bottom: 4px; }
.block-num { color: var(--text-3); }

/* ── Topbar ──────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-bottom: .5px solid var(--border);
  background: var(--bg-2);
  position: sticky;
  top: 0;
  z-index: 50;
}
.page-title { font-size: 14px; font-weight: 500; letter-spacing: .04em; }
.topbar-right { display: flex; align-items: center; gap: 8px; }

.status-chip {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: .5px solid var(--border);
  background: var(--bg-3);
  font-size: 10px;
  color: var(--text-2);
  letter-spacing: .05em;
}
.status-chip.warn { border-color: rgba(239,159,39,.3); color: var(--amber); }

.icon-btn {
  background: transparent;
  border: .5px solid var(--border);
  color: var(--text-2);
  padding: 4px 9px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  transition: background .15s;
}
.icon-btn:hover { background: var(--bg-3); color: var(--text); }

/* ── Pulse / dots ────────────────────────────── */
.pulse-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 1.8s infinite;
  display: inline-block;
}
.warn-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--amber);
  display: inline-block;
}
@keyframes pulse { 0%,100%{opacity:1}50%{opacity:.3} }

/* ── Metrics grid ────────────────────────────── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.metric-card {
  background: var(--bg-2);
  border: .5px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.metric-label {
  font-size: 9px;
  letter-spacing: .1em;
  color: var(--text-2);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.metric-value { font-size: 22px; font-weight: 500; letter-spacing: -.02em; }
.metric-sub { font-size: 10px; margin-top: 4px; }

/* ── Panels ──────────────────────────────────── */
.panel {
  background: var(--bg-2);
  border: .5px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.panel-title {
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--text-2);
  text-transform: uppercase;
}
.badge {
  font-size: 9px;
  padding: 2px 8px;
  border-radius: 3px;
  background: var(--bg-3);
  color: var(--text-2);
  border: .5px solid var(--border);
  letter-spacing: .05em;
}

/* ── Layout helpers ──────────────────────────── */
.two-col   { display: grid; grid-template-columns: 1.4fr 1fr; gap: 12px; margin-bottom: 12px; }
.three-col { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; margin-bottom: 12px; }
.col-span-2 { grid-column: span 2; }

.chart-wrap { position: relative; }

/* ── Colors ──────────────────────────────────── */
.up      { color: var(--green); }
.down    { color: var(--red); }
.neutral { color: var(--text-2); }
.warn-c  { color: var(--amber); }

/* ── Strategy list ───────────────────────────── */
.strategy-list { display: flex; flex-direction: column; gap: 8px; }

.strategy-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  background: var(--bg-3);
  border: .5px solid var(--border);
  border-radius: var(--radius-sm);
}
.strat-dot { width: 5px; height: 5px; border-radius: 50%; flex-shrink: 0; }
.strat-info { flex: 1; }
.strat-name { font-size: 12px; font-weight: 500; }
.strat-pair { font-size: 10px; color: var(--text-2); margin-top: 1px; }
.strat-right { text-align: right; }
.strat-pnl { font-size: 12px; font-weight: 500; }
.strat-sr  { font-size: 10px; color: var(--text-2); margin-top: 1px; }

/* Toggle switch */
.toggle { position: relative; width: 32px; height: 18px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--bg);
  border: .5px solid var(--border-2);
  border-radius: 9px;
  transition: .2s;
}
.slider::before {
  content: '';
  position: absolute;
  width: 12px; height: 12px;
  left: 2px; top: 2px;
  background: var(--text-2);
  border-radius: 50%;
  transition: .2s;
}
.toggle input:checked + .slider { background: var(--green); border-color: var(--green); }
.toggle input:checked + .slider::before { transform: translateX(14px); background: #fff; }

/* ── Data table ──────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  font-size: 9px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-2);
  font-weight: 400;
  padding: 0 0 8px;
  text-align: left;
  border-bottom: .5px solid var(--border);
}
.data-table td {
  padding: 8px 0;
  font-size: 11px;
  border-bottom: .5px solid var(--border);
  vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }

.side-tag {
  font-size: 9px;
  padding: 2px 7px;
  border-radius: 3px;
  font-weight: 600;
  letter-spacing: .04em;
}
.side-tag.buy  { background: rgba(29,158,117,.2);  color: #5DCAA5; }
.side-tag.sell { background: rgba(216,90,48,.2);   color: #E8896B; }

.status-filled    { color: var(--green); font-size: 10px; }
.status-pending   { color: var(--amber); font-size: 10px; }
.status-partial   { color: var(--text-2); font-size: 10px; }
.status-cancelled { color: var(--text-3); font-size: 10px; text-decoration: line-through; }

/* ── Signal feed ─────────────────────────────── */
.signal-feed { display: flex; flex-direction: column; gap: 8px; }
.signal-item { display: flex; gap: 10px; align-items: flex-start; font-size: 11px; }
.signal-time { color: var(--text-3); flex-shrink: 0; width: 38px; padding-top: 1px; }
.signal-text { color: var(--text); line-height: 1.4; }
.sig-up  { color: var(--green); font-weight: 600; }
.sig-dn  { color: var(--red); font-weight: 600; }
.sig-arb { color: var(--amber); font-weight: 600; }

/* ── Forms ───────────────────────────────────── */
.form-group { margin-bottom: 14px; }
.form-label {
  display: block;
  font-size: 9px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  background: var(--bg-3);
  border: .5px solid var(--border-2);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 12px;
  outline: none;
  transition: border-color .15s;
}
.form-control:focus { border-color: var(--green); }
select.form-control { cursor: pointer; }

.range-wrap { display: flex; align-items: center; gap: 8px; }
input[type=range] {
  flex: 1;
  accent-color: var(--green);
  height: 3px;
  cursor: pointer;
}
.range-val {
  min-width: 38px;
  text-align: right;
  font-size: 12px;
  font-weight: 500;
}

/* ── Buttons ─────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  cursor: pointer;
  border: .5px solid var(--border-2);
  background: transparent;
  color: var(--text);
  transition: background .15s, border-color .15s;
}
.btn:hover { background: var(--bg-3); }
.btn-primary {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}
.btn-primary:hover { background: #178f68; }
.btn-danger {
  background: var(--red-dim);
  border-color: rgba(216,90,48,.4);
  color: var(--red);
}
.btn-sm { padding: 5px 12px; font-size: 10px; }

/* ── Progress bar ────────────────────────────── */
.progress-bar {
  height: 3px;
  background: var(--bg-3);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 14px;
}
.progress-fill {
  height: 100%;
  background: var(--green);
  border-radius: 2px;
  transition: width .3s;
}

/* ── Risk meters ─────────────────────────────── */
.risk-bar-bg {
  height: 5px;
  border-radius: 3px;
  background: var(--bg-3);
  overflow: hidden;
  margin-top: 5px;
}
.risk-bar-fill { height: 100%; border-radius: 3px; transition: width .4s; }

/* ── Alert chips ─────────────────────────────── */
.alert-chip {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: .5px solid;
  margin-bottom: 8px;
  font-size: 11px;
}
.alert-chip.ok   { background: rgba(29,158,117,.08); border-color: rgba(29,158,117,.25); color: var(--green); }
.alert-chip.warn { background: rgba(239,159,39,.08); border-color: rgba(239,159,39,.25); color: var(--amber); }
.alert-chip.err  { background: rgba(216,90,48,.08);  border-color: rgba(216,90,48,.25);  color: var(--red); }

/* ── Code editor ─────────────────────────────── */
.code-block {
  background: #0d1117;
  border: .5px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  font-size: 11px;
  line-height: 1.85;
  overflow-x: auto;
  white-space: pre;
  color: #cdd5e0;
}
.kw  { color: #79b8f8; }
.fn  { color: #a8d8a8; }
.str { color: #f0b87a; }
.cm  { color: #586069; }
.num { color: #f0a875; }
.vr  { color: #e8d9c0; }
.op  { color: #79b8f8; }

/* ── Tab nav ─────────────────────────────────── */
.tab-nav { display: flex; gap: 4px; margin-bottom: 14px; }
.tab-btn {
  padding: 5px 12px;
  font-size: 10px;
  font-family: var(--font-mono);
  letter-spacing: .05em;
  border: .5px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: .15s;
}
.tab-btn:hover { background: var(--bg-3); color: var(--text); }
.tab-btn.active { background: var(--bg-3); color: var(--text); border-color: var(--border-2); }

/* ── Heatmap ─────────────────────────────────── */
.hm-grid { display: grid; gap: 3px; }
.hm-cell {
  height: 26px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 500;
  cursor: default;
  transition: opacity .15s;
}
.hm-cell:hover { opacity: .75; }
.hm-label { font-size: 9px; color: var(--text-3); text-align: center; }

/* ── Scrollbar ───────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-3); border-radius: 3px; }

/* ── Utility ─────────────────────────────────── */
.flex        { display: flex; }
.items-center{ align-items: center; }
.gap-8       { gap: 8px; }
.gap-12      { gap: 12px; }
.mb-12       { margin-bottom: 12px; }
.mb-16       { margin-bottom: 16px; }
.mt-12       { margin-top: 12px; }
.text-right  { text-align: right; }
.w-full      { width: 100%; }
.text-sm     { font-size: 10px; }
.text-xs     { font-size: 9px; }
.text-muted  { color: var(--text-2); }
.divider     { height: .5px; background: var(--border); margin: 12px 0; }

/* ── Responsive: tablet/mobile ───────────────── */
@media (max-width: 900px) {
  html, body { min-width: 0; overflow-x: hidden; }
  body { display: block; padding-bottom: 64px; }
  body.login-page { display: flex; padding-bottom: 0; }

  .sidebar {
    width: 100%;
    height: 58px;
    top: auto;
    right: 0;
    bottom: 0;
    left: 0;
    border-right: 0;
    border-top: .5px solid var(--border);
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
  }
  .sidebar-logo, .sidebar-footer { display: none; }
  .sidebar-nav {
    flex: 1;
    flex-direction: row;
    gap: 4px;
    padding: 6px 8px;
    min-width: max-content;
  }
  .nav-item {
    min-width: 56px;
    justify-content: center;
    flex-direction: column;
    gap: 2px;
    padding: 6px 8px;
    font-size: 9px;
    line-height: 1.15;
  }
  .nav-icon { width: auto; font-size: 15px; }
  .nav-label { display: block; flex: 0; white-space: nowrap; }

  .main-content { margin-left: 0; min-width: 0; }
  .topbar {
    padding: 10px 12px;
    gap: 8px;
    align-items: flex-start;
    flex-wrap: wrap;
  }
  .page-title { font-size: 13px; }
  .topbar-right {
    width: 100%;
    overflow-x: auto;
    gap: 6px;
    padding-bottom: 2px;
  }
  .status-chip { white-space: nowrap; padding: 4px 8px; font-size: 9px; }
  .page-body { padding: 12px 10px 78px; overflow-x: hidden; }

  .demo-banner { font-size: 11px; padding: 9px 10px; gap: 8px; }
  .demo-banner strong { display: block; }

  .metrics-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .metric-card { padding: 11px 12px; min-width: 0; }
  .metric-value { font-size: 18px; word-break: break-word; }
  .metric-label { font-size: 8px; }

  .two-col, .three-col { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .col-span-2 { grid-column: span 1; }
  .panel { padding: 12px; min-width: 0; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .panel > div[style*="display:flex"] { flex-wrap: wrap; }
  .panel div[style*="width:180px"] { width: 150px !important; height: 150px !important; }
  .panel > div[style*="display:flex"] > div[style*="flex:1"] { min-width: 180px; }
  .panel-header { gap: 8px; align-items: flex-start; }
  .panel-title { line-height: 1.35; }
  .badge { white-space: nowrap; }

  .chart-wrap { min-height: 190px; }
  .chart-wrap canvas { max-width: 100%; }

  .data-table { min-width: 620px; }
  .data-table th, .data-table td { white-space: nowrap; padding-right: 12px; }

  .strategy-item { align-items: flex-start; }
  .strat-card { flex-wrap: wrap; }
  .ind-grid { grid-template-columns: minmax(0, 1fr) !important; }
  .builder-canvas { overflow-x: auto; }
  .strat-right { min-width: 64px; }
  .signal-item { font-size: 10px; }

  .form-control, .btn { font-size: 12px; }
  .btn { justify-content: center; min-height: 36px; padding: 8px 12px; }
  .btn-sm { min-height: 30px; padding: 6px 10px; }
  .range-wrap { gap: 6px; }
  .tab-nav { overflow-x: auto; padding-bottom: 2px; }
  .tab-btn { white-space: nowrap; }

  form > div[style*="grid-template-columns"],
  .panel > div[style*="grid-template-columns"] {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .code-block { font-size: 10px; padding: 12px; max-width: 100%; }
  #hm-container { overflow-x: auto; }
}

@media (max-width: 480px) {
  .metrics-grid { grid-template-columns: minmax(0, 1fr); }
  .page-body { padding-left: 8px; padding-right: 8px; }
  .panel { border-radius: 7px; }
  .metric-card { border-radius: 7px; }
  .nav-item { min-width: 52px; padding-left: 6px; padding-right: 6px; }
  .nav-label { font-size: 8px; }
  .data-table { min-width: 560px; }
  .chart-wrap { min-height: 170px; }
  .topbar-right .icon-btn { display: none; }
}