/* ═══════════════════════════════════════════════════════════════
   TRADING SYSTEM DASHBOARD — Industrial Terminal Aesthetic
   Deep navy-black, teal accents, monospace data, sharp geometry
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&family=DM+Sans:wght@400;500;600;700&display=swap');

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #0f1521;
  --bg-card: #131b2b;
  --bg-card-hover: #172035;
  --bg-input: #0d1220;
  --border-primary: #1c2740;
  --border-accent: #1e3a5f;
  --border-glow: rgba(0, 212, 170, 0.15);

  --text-primary: #e2e8f0;
  --text-secondary: #8494a7;
  --text-muted: #4a5568;
  --text-heading: #f0f4f8;

  --accent-teal: #00d4aa;
  --accent-teal-dim: rgba(0, 212, 170, 0.12);
  --accent-teal-glow: rgba(0, 212, 170, 0.25);
  --accent-coral: #ff6b6b;
  --accent-coral-dim: rgba(255, 107, 107, 0.12);
  --accent-blue: #4c9aff;
  --accent-blue-dim: rgba(76, 154, 255, 0.12);
  --accent-amber: #ffb347;
  --accent-amber-dim: rgba(255, 179, 71, 0.12);
  --accent-purple: #a78bfa;

  --font-data: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-ui: 'DM Sans', 'Segoe UI', system-ui, sans-serif;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --shadow-card: 0 1px 3px rgba(0,0,0,0.4), 0 0 0 1px var(--border-primary);
  --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.5), 0 0 0 1px var(--border-accent);
  --shadow-glow: 0 0 20px var(--border-glow);

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-ui);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
}

/* Subtle scanline overlay */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

a { color: var(--accent-teal); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: #33e0be; }

/* ── Navigation ────────────────────────────────────────────── */
.nav-bar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 52px;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.nav-brand {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent-teal);
  letter-spacing: 0.5px;
  margin-right: 32px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-brand::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--accent-teal);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--accent-teal-glow);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 6px var(--accent-teal-glow); }
  50% { opacity: 0.5; box-shadow: 0 0 12px var(--accent-teal-glow); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.nav-links a {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.04);
}

.nav-links a.active {
  color: var(--accent-teal);
  background: var(--accent-teal-dim);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -7px;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--accent-teal);
  border-radius: 1px;
}

.nav-right {
  margin-left: auto;
}

.nav-right a {
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 6px 12px;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-right a:hover {
  color: var(--accent-coral);
  border-color: var(--accent-coral);
  background: var(--accent-coral-dim);
}

/* ── Main Content ──────────────────────────────────────────── */
.main-content {
  max-width: 1360px;
  margin: 0 auto;
  padding: 24px;
}

/* ── Cards ─────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-card-hover);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-primary);
}

.card-title {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-heading);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── Stat Cards Grid ───────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .stats-grid { grid-template-columns: 1fr; }
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
}

.stat-card.accent-teal::before { background: var(--accent-teal); }
.stat-card.accent-coral::before { background: var(--accent-coral); }
.stat-card.accent-blue::before { background: var(--accent-blue); }
.stat-card.accent-amber::before { background: var(--accent-amber); }

.stat-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 8px;
}

.stat-value {
  font-family: var(--font-data);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.2;
}

.stat-value.positive { color: var(--accent-teal); }
.stat-value.negative { color: var(--accent-coral); }

.stat-sub {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ── Tables ────────────────────────────────────────────────── */
.data-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

table.data-table thead th {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-accent);
  text-align: left;
  white-space: nowrap;
}

table.data-table tbody td {
  font-family: var(--font-data);
  font-size: 0.8rem;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-primary);
  color: var(--text-primary);
  white-space: nowrap;
}

table.data-table tbody tr {
  transition: background var(--transition-fast);
}

table.data-table tbody tr:hover {
  background: rgba(255,255,255,0.02);
}

table.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* ── P/L Color Classes ─────────────────────────────────────── */
.positive { color: var(--accent-teal) !important; }
.negative { color: var(--accent-coral) !important; }
.neutral { color: var(--text-muted) !important; }

.badge-long {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--accent-teal-dim);
  color: var(--accent-teal);
  border: 1px solid rgba(0, 212, 170, 0.2);
}

.badge-short {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--accent-coral-dim);
  color: var(--accent-coral);
  border: 1px solid rgba(255, 107, 107, 0.2);
}

.badge-strategy {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 500;
  background: var(--accent-blue-dim);
  color: var(--accent-blue);
  border: 1px solid rgba(76, 154, 255, 0.2);
}

/* ── Status Indicators ─────────────────────────────────────── */
.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

.status-dot.running {
  background: var(--accent-teal);
  box-shadow: 0 0 8px var(--accent-teal-glow);
  animation: pulse-dot 2s ease-in-out infinite;
}

.status-dot.stopped {
  background: var(--accent-coral);
  box-shadow: 0 0 8px rgba(255, 107, 107, 0.25);
}

.status-dot.unknown {
  background: var(--accent-amber);
}

/* ── Section Headers ───────────────────────────────────────── */
.section-title {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-heading);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title .count {
  font-family: var(--font-data);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid var(--border-primary);
}

/* ── Chart Container ───────────────────────────────────────── */
.chart-container {
  position: relative;
  height: 300px;
  padding: 16px;
}

.chart-container canvas {
  width: 100% !important;
}

/* ── Filter Bar ────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.filter-bar span {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-right: 4px;
}

.filter-btn {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding: 4px 12px;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  color: var(--accent-teal);
  border-color: var(--accent-teal);
  background: var(--accent-teal-dim);
}

/* ── Strategy Cards ────────────────────────────────────────── */
.strategies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.strategy-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.strategy-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-card-hover);
}

.strategy-name {
  font-family: var(--font-data);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--accent-blue);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-primary);
}

.strategy-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.strategy-stat-item {
  display: flex;
  flex-direction: column;
}

.strategy-stat-label {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.strategy-stat-value {
  font-family: var(--font-data);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 2px;
}

/* ── Knowledge Page ────────────────────────────────────────── */
.knowledge-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

@media (max-width: 768px) {
  .knowledge-grid { grid-template-columns: 1fr; }
}

.knowledge-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-primary);
}

.knowledge-item:last-child { border-bottom: none; }

.knowledge-type-badge {
  font-family: var(--font-data);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: var(--accent-purple);
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
}

.knowledge-title {
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--text-primary);
  line-height: 1.4;
}

.knowledge-date {
  font-family: var(--font-data);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ── System Page ───────────────────────────────────────────── */
.system-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

@media (max-width: 900px) {
  .system-grid { grid-template-columns: 1fr; }
}

.log-box {
  background: var(--bg-input);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-height: 400px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.log-line { padding: 2px 0; }
.log-line.error { color: var(--accent-coral); }

/* ── Login Page ────────────────────────────────────────────── */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  padding: 20px;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow-glow), var(--shadow-card);
}

.login-brand {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--accent-teal);
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.login-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--font-data);
  font-size: 0.85rem;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 3px var(--accent-teal-dim);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.btn-login {
  width: 100%;
  padding: 12px;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--bg-primary);
  background: var(--accent-teal);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.3px;
}

.btn-login:hover {
  background: #00e6b8;
  box-shadow: 0 0 16px var(--accent-teal-glow);
}

.login-error {
  background: var(--accent-coral-dim);
  border: 1px solid rgba(255, 107, 107, 0.3);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.8rem;
  color: var(--accent-coral);
  margin-bottom: 20px;
  text-align: center;
}

/* ── Footer ────────────────────────────────────────────────── */
.footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 40px;
}

.footer-text {
  font-family: var(--font-data);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.refresh-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-data);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.refresh-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-teal);
  animation: pulse-dot 2s ease-in-out infinite;
}

/* ── Empty States ──────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  opacity: 0.4;
}

.empty-state-text {
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ── Utility Classes ───────────────────────────────────────── */
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-mono { font-family: var(--font-data); }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.gap-16 { gap: 16px; }

/* ── Animations ────────────────────────────────────────────── */
@keyframes fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fade-in 0.4s ease-out both;
}

.animate-in:nth-child(1) { animation-delay: 0.05s; }
.animate-in:nth-child(2) { animation-delay: 0.10s; }
.animate-in:nth-child(3) { animation-delay: 0.15s; }
.animate-in:nth-child(4) { animation-delay: 0.20s; }

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-accent);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}