/* ─── Reset & Base ──────────────────────────────────────────────────────────── */
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  padding-top: 70px; /* push everything below fixed header */
  font-family: Arial, sans-serif;
  background-color: #eeeeee;
  color: #333;
}

/* ─── Header & Nav ─────────────────────────────────────────────────────────── */
.main-header {
  background-color: #232F3E;
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
}
.logo {
  height: 40px;
  margin-right: 1rem;
}
.header-title {
  color: #fff;
  font-size: 1.2rem;
  font-weight: bold;
  margin-right: auto;
}
.nav-btn {
  background-color: #FF9900;
  color: #111;
  border: none;
  border-radius: 5px;
  padding: 0.5rem 1rem;
  margin-left: 0.5rem;
  cursor: pointer;
  font-weight: bold;
}
.nav-btn:hover {
  background-color: #e48f00;
}

/* ─── Page Container ───────────────────────────────────────────────────────── */
.page-container {
  width: 95%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  background-color: #fff;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

/* ─── Trends Chart & Table ─────────────────────────────────────────────────── */

/* Chart area */
#chart-container {
  height: 50vh;
  width: 100%;
  margin-bottom: 2rem;
}

/* Table wrapper: scrollable pane */
#trends-table-container {
  max-height: 40vh;
  overflow: auto;
  border: 1px solid #ddd;
  margin-bottom: 1rem;
}

/* Spreadsheet-style table */
#trends-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}
#trends-table th,
#trends-table td {
  padding: 8px;
  text-align: center;
  border-bottom: 1px solid #ddd;
  font-size: 0.95rem;
}
#trends-table thead th {
  position: sticky;
  top: 0;
  background: #f2f2f2;
  border-bottom: 2px solid #ccc;
  cursor: pointer;
  user-select: none;
}
/* Zebra striping */
#trends-table tbody tr:nth-child(even) {
  background: #fafafa;
}
/* Sort arrow indicators */
.sortable::after {
  content: '▲▼';
  font-size: 0.6em;
  margin-left: 4px;
  color: #888;
}
.sortable.asc::after {
  content: '▲';
}
.sortable.desc::after {
  content: '▼';
}

/* ─── Responsive Tweaks ─────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
    margin-left: 0.25rem;
  }
}