:root {
  --bg: #f5f5f5;
  --card-bg: #ffffff;
  --text: #222;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
}

body.dark {
  --bg: #050816;
  --card-bg: #0f172a;
  --text: #e5e7eb;
  --accent: #38bdf8;
  --accent-soft: #0b1120;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--card-bg);
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.logo {
  font-weight: 700;
  font-size: 20px;
}

#darkModeToggle {
  padding: 6px 12px;
  border-radius: 999px;
  border: none;
  background: var(--accent-soft);
  color: var(--accent);
  cursor: pointer;
}

.tabs {
  display: flex;
  overflow-x: auto;
  background: var(--card-bg);
  padding: 8px;
}

.tab-btn {
  border: none;
  background: transparent;
  padding: 8px 12px;
  margin-right: 6px;
  cursor: pointer;
  border-radius: 999px;
  color: var(--text);
}

.tab-btn.active {
  background: var(--accent-soft);
  color: var(--accent);
}

main {
  max-width: 1100px;
  margin: 16px auto;
  padding: 0 12px 24px;
}

.search-area {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.search-area input {
  flex: 1;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #ccc;
  background: var(--card-bg);
  color: var(--text);
}

.search-area button {
  padding: 10px 16px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: white;
  cursor: pointer;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 16px;
  margin-top: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.card-list > div {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#addWatchlist {
  padding: 6px 12px;
  border-radius: 999px;
  border: none;
  background: var(--accent-soft);
  color: var(--accent);
  cursor: pointer;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
  margin: 12px 0;
}

.stats-grid div {
  background: var(--accent-soft);
  border-radius: 8px;
  padding: 8px;
  font-size: 14px;
}

.stats-grid span {
  display: block;
  margin-top: 4px;
}

#news div {
  padding: 8px 0;
  border-bottom: 1px solid rgba(148,163,184,0.4);
}

#watchlist {
  margin-top: 10px;
  padding: 10px;
  border-radius: 10px;
  background: var(--accent-soft);
  font-size: 14px;
}

.hidden {
  display: none;
}

.heatmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.heatmap-cell {
  border-radius: 10px;
  padding: 10px;
  color: white;
  font-size: 13px;
}

.multi-chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.multi-chart-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.hint {
  font-size: 13px;
  opacity: 0.8;
}

.etf-filters {
  display: flex;
  gap: 8px;
  margin: 10px 0;
}

.etf-filters select {
  padding: 8px;
  border-radius: 8px;
  border: 1px solid #ccc;
  background: var(--card-bg);
  color: var(--text);
}

.portfolio-inputs,
.alerts-inputs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.portfolio-inputs input,
.alerts-inputs input,
.alerts-inputs select {
  flex: 1;
  min-width: 120px;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid #ccc;
  background: var(--card-bg);
  color: var(--text);
}

.portfolio-inputs button,
.alerts-inputs button {
  padding: 8px 14px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: white;
  cursor: pointer;
}

.portfolio-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

.portfolio-table th,
.portfolio-table td {
  padding: 8px;
  border-bottom: 1px solid rgba(148,163,184,0.4);
  font-size: 13px;
}

@media (max-width: 600px) {
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tabs {
    font-size: 13px;
  }

  .top-bar {
    flex-direction: row;
  }
}