/* --- CSS Custom Properties --- */
:root {
  --bg-base: #0A0A0A;
  --bg-surface: #111111;
  --bg-elevated: #1A1A1A;
  --bg-hover: #222222;
  --border: rgba(232, 226, 217, 0.08);
  --border-strong: rgba(232, 226, 217, 0.15);
  --text-primary: #E8E2D9;
  --text-secondary: rgba(232, 226, 217, 0.5);
  --text-tertiary: rgba(232, 226, 217, 0.3);
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --font-ui: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

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

html, body {
  height: 100%;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); }

/* --- Login --- */
.login-overlay {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-base);
  z-index: 1000;
}
.login-overlay.hidden { display: none; }

.login-box {
  width: 320px;
  text-align: center;
}
.login-title {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 300;
  letter-spacing: 4px;
  margin-bottom: 4px;
}
.login-subtitle {
  color: var(--text-tertiary);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 32px;
}
.login-box input {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  outline: none;
  margin-bottom: 12px;
}
.login-box input:focus { border-color: var(--border-strong); }
.login-box input::placeholder { color: var(--text-tertiary); }
.login-error { color: #a0706e; font-size: 11px; margin-top: 8px; min-height: 16px; }

/* --- Buttons --- */
.btn-ghost {
  display: inline-block;
  padding: 8px 20px;
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  width: 100%;
}
.btn-ghost:hover { background: var(--bg-elevated); border-color: var(--text-secondary); }
.btn-sm { padding: 4px 12px; width: auto; font-size: 10px; }

/* --- Dashboard layout --- */
.dashboard { display: flex; flex-direction: column; height: 100vh; }
.dashboard.hidden { display: none; }

/* --- Top bar --- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
  flex-shrink: 0;
}
.topbar-left { display: flex; align-items: center; gap: 10px; }
.topbar-title {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 300;
  letter-spacing: 3px;
}
.topbar-divider { color: var(--text-tertiary); }
.topbar-label {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-tertiary);
  text-transform: uppercase;
}
.topbar-right { display: flex; align-items: center; gap: 16px; }
.topbar-clock {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  letter-spacing: 1px;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  background: var(--bg-surface);
  flex-shrink: 0;
  overflow-x: auto;
}
.tab {
  padding: 10px 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--text-tertiary);
  text-decoration: none;
  text-transform: uppercase;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.tab:hover { color: var(--text-secondary); }
.tab.active {
  color: var(--text-primary);
  border-bottom-color: var(--text-primary);
}

/* --- Period bar --- */
.period-bar {
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.period-selector { display: flex; gap: 4px; }
.period-btn {
  padding: 4px 12px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all 0.15s;
}
.period-btn:hover { border-color: var(--border-strong); color: var(--text-secondary); }
.period-btn.active {
  border-color: var(--text-secondary);
  color: var(--text-primary);
  background: var(--bg-elevated);
}

/* --- Content --- */
.content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

/* --- KPI grid --- */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--border);
}
.kpi-grid-4 { grid-template-columns: repeat(4, 1fr); }
.kpi-grid-3 { grid-template-columns: repeat(3, 1fr); }
.kpi-grid-5 { grid-template-columns: repeat(5, 1fr); }

.kpi-card {
  background: var(--bg-surface);
  padding: 16px 20px;
}
.kpi-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.kpi-value {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 300;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

/* --- Charts --- */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  margin-top: 16px;
}
.chart-box {
  background: var(--bg-surface);
  padding: 20px;
}
.chart-container { height: 240px; position: relative; }
.chart-container-wide { height: 200px; position: relative; }

/* --- Section --- */
.section {
  margin-top: 16px;
  background: var(--bg-surface);
  padding: 20px;
}
.section-title {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  margin-bottom: 16px;
  font-weight: 400;
}

/* --- Tables --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 11px;
}
.data-table th {
  text-align: left;
  padding: 8px 12px;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--text-tertiary);
  font-weight: 400;
  border-bottom: 1px solid var(--border);
}
.data-table td {
  padding: 8px 12px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.data-table tr:hover td { background: var(--bg-elevated); }
.data-table tr:last-child td { border-bottom: none; }

.mono { font-family: var(--font-mono); }

/* --- Tags --- */
.tag {
  display: inline-block;
  padding: 1px 6px;
  font-size: 10px;
  letter-spacing: 1px;
  border: 1px solid var(--border-strong);
}
.tag-buy { color: var(--text-primary); }
.tag-sell { color: var(--text-secondary); }

/* --- Status --- */
.status {
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.status-filled { color: var(--text-primary); }
.status-failed { color: #a0706e; }
.status-skipped { color: var(--text-tertiary); }
.status-pending { color: var(--text-secondary); }

/* --- Loading / empty --- */
.loading, .empty, .error {
  text-align: center;
  padding: 40px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1px;
}
.error { color: #a0706e; }

/* --- Responsive --- */
@media (max-width: 1200px) {
  .kpi-grid, .kpi-grid-4, .kpi-grid-5 { grid-template-columns: repeat(3, 1fr); }
  .chart-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .kpi-grid, .kpi-grid-3, .kpi-grid-4, .kpi-grid-5 { grid-template-columns: repeat(2, 1fr); }
  .chart-grid { grid-template-columns: 1fr; }
  .content { padding: 16px; }
  .topbar { padding: 10px 16px; }
  .tabs { padding: 0 16px; }
  .period-bar { padding: 10px 16px; }
  .kpi-value { font-size: 18px; }
}