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

:root {
  --bg:         #0d1117;
  --surface:    #161b22;
  --surface2:   #1c2129;
  --border:     #30363d;
  --border-lt:  #21262d;
  --text:       #e6edf3;
  --text2:      #8b949e;
  --text3:      #484f58;
  --accent:     #58a6ff;
  --green:      #3fb950;
  --red:        #f85149;
  --orange:     #d29922;
  --purple:     #bc8cff;
  --radius:     8px;
  --radius-sm:  4px;
}

html { font-size: 14px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
}

/* ===== Nav ===== */
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 52px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-brand {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.nav-links { display: flex; gap: 4px; }
.nav-link {
  color: var(--text2);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.nav-link:hover { color: var(--text); background: var(--border-lt); }
.nav-link.active { color: var(--text); background: rgba(88,166,255,0.12); }

/* ===== Main ===== */
main { max-width: 1200px; margin: 0 auto; padding: 32px 24px 64px; }

/* ===== Home ===== */
.home-hero { text-align: center; margin-bottom: 48px; }
.home-hero h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; }
.hero-sub { color: var(--text2); margin-top: 8px; font-size: 1.05rem; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.card-cot:hover { border-color: var(--green); }
.card-edgar:hover { border-color: var(--purple); }
.card-bench:hover { border-color: var(--accent); }
.card-cboe:hover { border-color: var(--orange); }
.card-fred:hover { border-color: #06b6d4; }

.card-icon { margin-bottom: 20px; color: var(--text2); }
.card-cot .card-icon { color: var(--green); }
.card-edgar .card-icon { color: var(--purple); }
.card-bench .card-icon { color: var(--accent); }
.card-cboe .card-icon { color: var(--orange); }
.card-fred .card-icon { color: #06b6d4; }

.card h2 { font-size: 1.3rem; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.01em; }
.card-desc { color: var(--text2); font-size: 0.9rem; margin-bottom: 24px; line-height: 1.6; flex: 1; }

.card-stats {
  display: flex;
  gap: 24px;
  margin-bottom: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--border-lt);
  border-bottom: 1px solid var(--border-lt);
}
.stat { display: flex; flex-direction: column; }
.stat-value { font-size: 1.4rem; font-weight: 700; color: var(--text); letter-spacing: -0.02em; }
.stat-label { font-size: 0.75rem; color: var(--text2); margin-top: 2px; }

.card-date { font-size: 0.8rem; color: var(--text3); margin-top: 12px; }
.card-action {
  margin-top: 16px;
  color: var(--accent);
  font-weight: 500;
  font-size: 0.9rem;
}
.card-cot .card-action { color: var(--green); }
.card-edgar .card-action { color: var(--purple); }
.card-bench .card-action { color: var(--accent); }
.card-cboe .card-action { color: var(--orange); }
.card-fred .card-action { color: #06b6d4; }

/* ===== Page Header ===== */
.page-header { margin-bottom: 24px; }
.page-header h1 { font-size: 1.5rem; font-weight: 600; letter-spacing: -0.02em; }

/* ===== Controls ===== */
.controls { margin-bottom: 24px; }
.control-row { margin-bottom: 12px; }

.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tab {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text2);
  padding: 7px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  font-family: inherit;
  transition: all 0.15s;
}
.tab:hover { color: var(--text); border-color: var(--text3); }
.tab.active { color: var(--text); background: var(--accent); border-color: var(--accent); }
.tabs.small .tab { padding: 5px 12px; font-size: 0.8rem; border-radius: var(--radius-sm); }

/* ===== Search ===== */
.search-wrap { position: relative; max-width: 600px; }
.search-input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}
.search-input::placeholder { color: var(--text3); }
.search-input:focus { border-color: var(--accent); }

.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-top: 4px;
  max-height: 320px;
  overflow-y: auto;
  display: none;
  z-index: 50;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.dropdown.open { display: block; }
.dropdown-item {
  padding: 8px 14px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text2);
  transition: background 0.1s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.dropdown-item:hover { background: var(--border-lt); color: var(--text); }
.dropdown-item mark { background: rgba(88,166,255,0.25); color: var(--accent); border-radius: 2px; }

/* ===== Chips ===== */
.chip-scroll {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.chip {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text2);
  padding: 4px 12px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.75rem;
  font-family: inherit;
  white-space: nowrap;
  transition: all 0.15s;
}
.chip:hover { color: var(--text); border-color: var(--accent); background: rgba(88,166,255,0.08); }
.chip.active { color: var(--text); border-color: var(--accent); background: rgba(88,166,255,0.15); }

/* Stat row (benchmarks) */
.stat-row {
  display: flex; gap: 12px; margin-bottom: 16px; flex-wrap: wrap;
}
.stat-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 10px 16px; display: flex; flex-direction: column; min-width: 140px;
}
.stat-card .stat-label { font-size: 0.7rem; color: var(--text3); text-transform: uppercase; letter-spacing: 0.04em; }
.stat-card .stat-value { font-size: 1.1rem; font-weight: 600; font-variant-numeric: tabular-nums; }

/* ===== Charts ===== */
.charts-area { }
.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.chart-card h3 { font-size: 0.9rem; font-weight: 600; color: var(--text2); margin-bottom: 12px; }
.chart { width: 100%; height: 300px; }

/* ===== Tables ===== */
.table-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.table-card h3 { font-size: 0.9rem; font-weight: 600; color: var(--text2); margin-bottom: 12px; }
.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
th {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 2px solid var(--border);
  color: var(--text2);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-lt);
  white-space: nowrap;
}
.r { text-align: right; font-variant-numeric: tabular-nums; }
.group-name { font-weight: 500; }

.pos { color: var(--green); }
.neg { color: var(--red); }
.dim { color: var(--text3); }
.bold { font-weight: 600; }

.oi-row { border-top: 2px solid var(--border); }
.oi-row td { font-weight: 600; }

/* Percentile bar */
.pct-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 120px;
}
.pct-fill {
  height: 6px;
  border-radius: 3px;
  background: var(--accent);
  flex: none;
  transition: width 0.3s;
}
.pct-label { font-size: 0.75rem; color: var(--text2); flex: none; }

/* ===== EDGAR table ===== */
.edgar-table-wrap { max-height: 600px; overflow-y: auto; }
.edgar-table th { position: sticky; top: 0; background: var(--surface); z-index: 5; }
.edgar-table .label-col {
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.edgar-table th.label-col { text-transform: none; letter-spacing: normal; font-size: 0.85rem; }
.total-row td { font-weight: 600; border-top: 1px solid var(--border); }

/* ===== Guide section ===== */
.guide {
  background: linear-gradient(135deg, #1a2332 0%, #161b22 100%);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  margin-bottom: 20px;
  overflow: hidden;
}
.guide-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: none;
  border: none;
  color: var(--accent);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}
.guide-toggle:hover { background: rgba(88,166,255,0.04); }
.guide-toggle .arrow { transition: transform 0.2s; font-size: 0.7rem; }
.guide-toggle .arrow.open { transform: rotate(90deg); }
.guide-body {
  display: none;
  padding: 0 16px 16px;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text2);
}
.guide-body.open { display: block; }
.guide-body h4 {
  color: var(--text);
  font-size: 0.85rem;
  margin: 14px 0 6px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border-lt);
}
.guide-body h4:first-child { margin-top: 0; }
.guide-body p { margin: 4px 0; }
.guide-body ul { padding-left: 18px; margin: 4px 0; }
.guide-body li { margin: 3px 0; }
.guide-body strong { color: var(--text); }
.guide-body .signal-green { color: var(--green); font-weight: 600; }
.guide-body .signal-red { color: var(--red); font-weight: 600; }
.guide-body .signal-yellow { color: var(--orange); font-weight: 600; }
.guide-body .callout {
  background: rgba(88,166,255,0.06);
  border: 1px solid rgba(88,166,255,0.15);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin: 8px 0;
}

/* ===== Empty state ===== */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text3);
  font-size: 1rem;
}
.hidden { display: none !important; }

/* ===== Data Table ===== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.data-table th, .data-table td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border-lt);
}
.data-table th {
  color: var(--text3);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
  position: sticky;
  top: 0;
  background: var(--surface);
}
.data-table tr:hover td { background: var(--surface2); }
.data-table td { color: var(--text2); }

/* ===== Chart Footnotes ===== */
.chart-footnote {
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--surface2);
  border-left: 3px solid var(--border);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text2);
}
.chart-footnote strong {
  color: var(--text);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.chart-footnote em { color: var(--text); font-style: normal; font-weight: 600; }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ===== Responsive ===== */
@media (max-width: 600px) {
  main { padding: 16px 12px 48px; }
  .card-grid { grid-template-columns: 1fr; }
  .card { padding: 20px; }
  .card-stats { gap: 16px; flex-wrap: wrap; }
  .chart { height: 220px; }
}