/* ─── Variables ──────────────────────────────────────────────────────────── */
:root {
  --bg:          #f5f5f7;
  --bg-card:     #ffffff;
  --bg-hover:    #fafafa;
  --bg-subtle:   #f0f0f2;
  --border:      rgba(0,0,0,0.06);
  --border-sub:  rgba(0,0,0,0.04);

  --text-pri:    #1d1d1f;
  --text-sec:    #6e6e73;
  --text-muted:  #aeaeb2;

  --purple:  #8b5cf6;
  --blue:    #3b82f6;
  --gray:    #8e8e93;
  --teal:    #0d9488;
  --orange:  #ea580c;
  --green:   #16a34a;
  --red:     #dc2626;
  --yellow:  #ca8a04;

  --shadow-sm:  0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg:  0 8px 30px rgba(0,0,0,0.08);

  --font:      'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --radius:    16px;
  --radius-sm: 10px;
}

/* ─── Reset ──────────────────────────────────────────────────────────────── */
*, *::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);
  background: var(--bg);
  color: var(--text-pri);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}
a { color: var(--blue); text-decoration: none; }

/* ─── Header ─────────────────────────────────────────────────────────────── */
.header {
  background: rgba(255,255,255,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 20px 28px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.portfolio-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-pri);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.portfolio-subtitle {
  display: block;
  font-size: 13px;
  color: var(--text-sec);
  margin-top: 3px;
  font-weight: 400;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.portfolio-value-block {
  text-align: right;
}

.portfolio-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  color: var(--text-pri);
  letter-spacing: -0.02em;
}

.portfolio-value-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 3px;
  font-weight: 500;
}

.refresh-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-sec);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}
.refresh-btn:hover { border-color: rgba(0,0,0,0.12); color: var(--text-pri); box-shadow: var(--shadow-md); }
.refresh-btn:active { transform: scale(0.95); }
.refresh-btn.spinning svg { animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── KPI Row ────────────────────────────────────────────────────────────── */
.kpi-row {
  display: flex;
  gap: 0;
  border-top: 1px solid var(--border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.kpi-card {
  flex: 1;
  min-width: 120px;
  padding: 14px 18px 16px;
  border-right: 1px solid var(--border);
  text-align: center;
  transition: background 0.15s;
}
.kpi-card:last-child { border-right: none; }
.kpi-card:hover { background: rgba(0,0,0,0.01); }

.kpi-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--text-pri);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.kpi-label {
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
}

/* ─── Tab Nav ────────────────────────────────────────────────────────────── */
.tab-nav {
  display: flex;
  background: rgba(255,255,255,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  gap: 2px;
}

.tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-sec);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  padding: 13px 18px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
  border-radius: 6px 6px 0 0;
}
.tab-btn:hover  { color: var(--text-pri); background: rgba(0,0,0,0.02); }
.tab-btn.active { color: var(--purple); border-bottom-color: var(--purple); font-weight: 600; }

/* ─── Main Content ───────────────────────────────────────────────────────── */
.main-content {
  padding: 24px 28px;
  max-width: 1400px;
  margin: 0 auto;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.25s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

/* ─── Section Cards ──────────────────────────────────────────────────────── */
.section-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}
.section-card:hover { box-shadow: var(--shadow-md); }

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 10px;
}

.chart-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-pri);
  margin-bottom: 0;
  letter-spacing: -0.01em;
}

.section-card > .chart-title { margin-bottom: 18px; }

.subtitle-text {
  font-size: 13px;
  color: var(--text-sec);
  margin-bottom: 16px;
  display: block;
  line-height: 1.5;
}

/* ─── Legend ─────────────────────────────────────────────────────────────── */
.legend {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-sec);
  font-weight: 500;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.legend-line {
  display: inline-block;
  width: 18px;
  height: 0;
  border-top: 2px solid;
  flex-shrink: 0;
}
.legend-line.dashed { border-top-style: dashed; }
.legend-line.dotted { border-top-style: dotted; }

/* ─── Chart Wrappers ─────────────────────────────────────────────────────── */
.chart-wrap {
  position: relative;
  height: 300px;
}

.chart-wrap-doughnut {
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ─── Tables ─────────────────────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  min-width: 500px;
}

.data-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  background: var(--bg-subtle);
}

.data-table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border-sub);
  color: var(--text-pri);
  font-family: var(--font-mono);
  font-size: 13px;
}

.data-table td:first-child {
  font-family: var(--font);
  color: var(--text-sec);
  font-size: 13px;
  font-weight: 500;
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-hover); }
.data-table tr { transition: background 0.1s ease; }

/* ─── Color helpers ──────────────────────────────────────────────────────── */
.pos   { color: var(--green) !important; }
.neg   { color: var(--red)   !important; }

.text-purple { color: var(--purple); }
.text-blue   { color: var(--blue);   }
.text-gray   { color: var(--gray);   }
.text-teal   { color: var(--teal);   }
.text-orange { color: var(--orange); }

/* ─── Correlation Matrix ─────────────────────────────────────────────────── */
.corr-wrap {
  overflow-x: auto;
}

.corr-table {
  border-collapse: collapse;
  font-size: 13px;
}

.corr-table th, .corr-table td {
  padding: 12px 16px;
  text-align: center;
  border: 1px solid var(--border-sub);
  white-space: nowrap;
}

.corr-table th {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--bg-subtle);
}

.corr-table td {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  border-radius: 4px;
}

.corr-diag { color: var(--text-muted) !important; background: var(--bg-subtle) !important; }
.corr-low  { color: var(--green); background: rgba(22,163,74,0.06); }
.corr-mid  { color: var(--yellow); background: rgba(202,138,4,0.06); }
.corr-high { color: var(--red); background: rgba(220,38,38,0.06); }

/* ─── Insights ───────────────────────────────────────────────────────────── */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}

.insight-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  transition: box-shadow 0.2s ease;
}
.insight-box:hover { box-shadow: var(--shadow-sm); }

.insight-box .insight-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 500;
}

.insight-box .insight-value {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-pri);
  letter-spacing: -0.01em;
}

/* ─── Grid Layout ────────────────────────────────────────────────────────── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

/* ─── REBALANCE badge ────────────────────────────────────────────────────── */
.badge-rebalance {
  background: rgba(220,38,38,0.08);
  color: var(--red);
  border: 1px solid rgba(220,38,38,0.2);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-ok {
  color: var(--text-muted);
  font-size: 12px;
}

/* ─── Loading Overlay ────────────────────────────────────────────────────── */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  z-index: 999;
  transition: opacity 0.4s ease;
}

.loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}
.loading-overlay.gone {
  display: none !important;
}

.loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--purple);
  border-radius: 50%;
  animation: spin 0.9s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.loading-overlay p {
  color: var(--text-sec);
  font-size: 15px;
  font-weight: 500;
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .main-content { padding: 14px; }
  .section-card { padding: 16px; border-radius: 12px; }
  .header { padding: 14px 16px 0; }
  .kpi-card { min-width: 100px; padding: 12px 12px 14px; }
  .kpi-value { font-size: 18px; }
  .grid-2 { grid-template-columns: 1fr; }
  .chart-wrap { height: 240px; }
  .chart-wrap-doughnut { height: 240px; }
  .portfolio-value { font-size: 20px; }
  .portfolio-title { font-size: 20px; }
  .tab-btn { padding: 12px 14px; font-size: 12px; }
}

@media (max-width: 480px) {
  .kpi-row { flex-wrap: wrap; }
  .kpi-card { min-width: 80px; flex: 0 0 calc(33.33% - 1px); }
  .header-top { flex-direction: column; }
  .portfolio-value-block { text-align: left; }
  .chart-title { font-size: 14px; }
}