:root {
  --bg-primary: #0D1835;
  --bg-secondary: #091025;
  --bg-input: #02174E;
  --bg-card: #0f1f45;
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.65);
  --text-dim: rgba(255, 255, 255, 0.35);
  --accent: #51A8C5;
  --accent-dim: rgba(81, 168, 197, 0.3);
  --error: #D24540;
  --border: rgba(81, 168, 197, 0.15);
  --radius: 12px;
  --green: #22c55e;
  --amber: #f59e0b;
  --red: #ef4444;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
}

/* Layout */
.layout {
  display: flex;
  height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 200px;
  min-width: 200px;
  background: var(--bg-primary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
}

.sidebar-header {
  padding: 0 16px 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
  font-size: 18px;
  font-weight: 600;
  color: var(--accent);
}

.sidebar-header .subtitle {
  font-size: 11px;
  color: var(--text-dim);
  display: block;
  margin-top: 2px;
}

.nav-tabs {
  flex: 1;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-tab {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 10px 12px;
  text-align: left;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
}

.nav-tab:hover {
  background: var(--accent-dim);
  color: var(--text-primary);
}

.nav-tab.active {
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 600;
}

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  display: inline-block;
}

/* Content */
.content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.tab-content {
  display: none;
}

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

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.card-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.card-value {
  font-size: 24px;
  font-weight: 700;
}

.card-sub {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.card-wide {
  grid-column: span 2;
}

/* Tables */
.table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}

.table-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.table-header h3 {
  font-size: 14px;
  font-weight: 600;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th {
  text-align: left;
  padding: 10px 12px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

th:hover {
  color: var(--text-secondary);
}

td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  white-space: nowrap;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: rgba(81, 168, 197, 0.05);
}

/* Colors */
.positive { color: var(--green); }
.negative { color: var(--red); }
.neutral { color: var(--text-secondary); }
.accent { color: var(--accent); }

/* Section headers */
.section-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 16px;
}

/* Filter bar */
.filters {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.filter-btn {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.15s;
}

.filter-btn:hover, .filter-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

/* Select */
select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
}

select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Input */
input[type="number"], input[type="text"] {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  width: 120px;
}

input:focus {
  outline: none;
  border-color: var(--accent);
}

/* Chart container */
.chart-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 24px;
  position: relative;
  height: 300px;
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}

.badge-green { background: rgba(34, 197, 94, 0.15); color: var(--green); }
.badge-red { background: rgba(239, 68, 68, 0.15); color: var(--red); }
.badge-amber { background: rgba(245, 158, 11, 0.15); color: var(--amber); }
.badge-accent { background: var(--accent-dim); color: var(--accent); }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-dim);
}

.empty-state h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

/* Expandable row */
.expand-row {
  cursor: pointer;
}

.expand-detail {
  display: none;
}

.expand-detail.open {
  display: table-row;
}

.expand-detail td {
  padding: 16px;
  background: var(--bg-secondary);
}

/* Metrics grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.metric {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
}

.metric-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.metric-value {
  font-size: 20px;
  font-weight: 700;
  margin-top: 4px;
}

/* Sizing calculator */
.sizing-form {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-group label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
}

.sizing-result {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

/* Mood bar */
.mood-bar {
  display: flex;
  height: 24px;
  border-radius: 12px;
  overflow: hidden;
  margin-top: 8px;
}

.mood-segment {
  transition: width 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 600;
  color: rgba(0,0,0,0.7);
  min-width: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    min-width: 100%;
    flex-direction: row;
    padding: 0;
    height: auto;
    overflow-x: auto;
  }
  .sidebar-header {
    display: none;
  }
  .nav-tabs {
    flex-direction: row;
    padding: 8px;
    gap: 4px;
  }
  .nav-tab {
    white-space: nowrap;
    padding: 8px 12px;
  }
  .sidebar-footer {
    display: none;
  }
  .content {
    height: calc(100vh - 52px);
  }
  .cards {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
  .card-wide {
    grid-column: span 1;
  }
}

/* Loading spinner */
.loading {
  display: flex;
  justify-content: center;
  padding: 48px;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}