:root {
  --bg: #ffffff;
  --bg-sidebar: #f7f8fa;
  --bg-card: #ffffff;
  --border: #e3e6ea;
  --text: #1a1d21;
  --text-muted: #6b7280;
  --accent: #4c78a8;
  --up: #1e8e5a;
  --down: #c0392b;
  --banner-bg: #eef4fb;
  --banner-border: #b9d4ec;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1117;
    --bg-sidebar: #161a23;
    --bg-card: #161a23;
    --border: #2a2f3a;
    --text: #e6e8eb;
    --text-muted: #9aa1ac;
    --accent: #6fa3d6;
    --up: #3fbf80;
    --down: #e0685c;
    --banner-bg: #16233a;
    --banner-border: #274666;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Source Sans Pro", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 290px;
  flex-shrink: 0;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  padding: 1.5rem 1.25rem;
  overflow-y: auto;
}

.sidebar h2 {
  font-size: 1rem;
  margin: 0 0 1rem;
}

.filter-group {
  margin-bottom: 1.25rem;
}

.filter-group label.group-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.date-range {
  display: flex;
  gap: 0.5rem;
}

.date-range input[type="date"] {
  width: 100%;
  padding: 0.35rem 0.4rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.85rem;
}

.checkbox-list {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  max-height: 200px;
  overflow-y: auto;
  padding-right: 0.25rem;
}

.checkbox-list label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 0.15rem 0.2rem;
  border-radius: 4px;
}

.checkbox-list label:hover {
  background: var(--bg);
}

/* Dropdown filter */
.dropdown {
  position: relative;
}

.dropdown-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
  text-align: left;
}

.dropdown-toggle:hover {
  border-color: var(--accent);
}

.dropdown.open .dropdown-toggle {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 20%, transparent);
}

.dropdown-toggle-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chevron {
  color: var(--text-muted);
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

.dropdown.open .chevron {
  transform: rotate(180deg);
}

.dropdown-panel {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  z-index: 20;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  padding: 0.6rem;
}

.dropdown.open .dropdown-panel {
  display: block;
}

.dropdown-actions {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.link-btn {
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  font-size: 0.78rem;
  cursor: pointer;
  text-decoration: underline;
}

.reset-btn {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
  margin-top: 0.5rem;
}

.reset-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Main content */
.main {
  flex: 1;
  padding: 1.5rem 2rem 3rem;
  min-width: 0;
}

.banner {
  background: var(--banner-bg);
  border: 1px solid var(--banner-border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.banner a {
  color: var(--accent);
}

h1.page-title {
  font-size: 1.9rem;
  margin: 0 0 1.25rem;
}

/* KPI row */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}

.kpi-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.kpi-value {
  font-size: 1.6rem;
  font-weight: 600;
}

.kpi-delta {
  font-size: 0.85rem;
  margin-top: 0.3rem;
}

.kpi-delta.up {
  color: var(--up);
}

.kpi-delta.down {
  color: var(--down);
}

/* Tabs */
.tabs {
  display: flex;
  gap: 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.25rem;
}

.tab-btn {
  background: none;
  border: none;
  padding: 0.6rem 0.1rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.tab-btn.active {
  color: var(--text);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

h3.chart-title {
  font-size: 1.05rem;
  margin: 1.25rem 0 0.6rem;
}

.chart-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
}

/* Rep table */
table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

table.data-table th,
table.data-table td {
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  white-space: nowrap;
}

table.data-table th {
  background: var(--bg-sidebar);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

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

.refund-high {
  color: var(--down);
  font-weight: 700;
}

.table-scroll {
  overflow: auto;
  max-height: 480px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.table-scroll table.data-table {
  border: none;
  border-radius: 0;
}

.table-scroll thead th {
  position: sticky;
  top: 0;
  z-index: 1;
}

.raw-data-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.download-btn {
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
}

.download-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.empty-state {
  color: var(--text-muted);
  padding: 2rem 0;
  text-align: center;
}

.row-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

@media (max-width: 900px) {
  .layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .kpi-row {
    grid-template-columns: repeat(2, 1fr);
  }
}