:root {
  --bg-dark: #0f172a;
  --panel-bg: #1e293b;
  --panel-border: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: rgba(59, 130, 246, 0.15);
  --success: #10b981;
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  line-height: 1.5;
  display: flex;
  flex-direction: column;
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Banner */
.banner {
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  font-weight: 500;
  border-bottom: 1px solid var(--panel-border);
}
.banner-warning {
  background-color: var(--warning-bg);
  color: var(--warning);
  border-color: rgba(245, 158, 11, 0.3);
}

/* Header */
.app-header {
  background-color: var(--panel-bg);
  border-bottom: 1px solid var(--panel-border);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-icon {
  font-size: 1.5rem;
}
.app-header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}
.header-badge {
  background-color: var(--accent-light);
  color: var(--accent);
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* Layout */
.main-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background-color: var(--panel-bg);
  border-right: 1px solid var(--panel-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}
.sidebar-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--panel-border);
}
.sidebar-header h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}
.report-nav {
  overflow-y: auto;
  flex: 1;
}
.report-nav ul {
  list-style: none;
}
.nav-item {
  padding: 14px 20px;
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
}
.nav-item:hover {
  background-color: rgba(255, 255, 255, 0.03);
}
.nav-item.active {
  background-color: var(--accent-light);
  border-left: 4px solid var(--accent);
}
.nav-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}
.nav-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}
.chart-tag {
  font-size: 0.7rem;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 700;
  background: #334155;
  color: var(--text-muted);
}
.chart-tag-bar { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.chart-tag-line { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.chart-tag-pie { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.chart-tag-table { background: rgba(168, 85, 247, 0.2); color: #c084fc; }

/* Content Area */
.content-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 20px;
  overflow-y: auto;
}

.panel {
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 20px;
}
.panel-header {
  margin-bottom: 16px;
}
.panel-header h2 {
  font-size: 1.2rem;
  font-weight: 700;
}
.text-muted {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* Form controls */
.param-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.param-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 180px;
}
.field-group label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
}
.input-control {
  background-color: var(--bg-dark);
  border: 1px solid var(--panel-border);
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.9rem;
}
.input-control:focus {
  outline: none;
  border-color: var(--accent);
}

/* Toolbar */
.action-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--panel-border);
}
.button-group {
  display: flex;
  gap: 8px;
}
.btn {
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-primary {
  background-color: var(--accent);
  color: white;
}
.btn-primary:hover {
  background-color: var(--accent-hover);
}
.btn-secondary {
  background-color: #334155;
  color: var(--text-main);
}
.btn-secondary:hover {
  background-color: #475569;
}
.btn-outline {
  background-color: transparent;
  border-color: var(--panel-border);
  color: var(--text-muted);
}
.btn-outline:hover {
  color: var(--text-main);
  border-color: var(--text-muted);
}

/* Results section */
.results-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-height: 350px;
}
.chart-card {
  height: 280px;
  position: relative;
  background: var(--bg-dark);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 16px;
}
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}
.empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

/* Table styling */
.table-container {
  overflow-x: auto;
  max-height: 420px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}
th {
  background-color: #0f172a;
  color: var(--text-muted);
  font-weight: 600;
  padding: 10px 16px;
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--panel-border);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}
td {
  padding: 10px 16px;
  border-bottom: 1px solid rgba(51, 65, 85, 0.4);
}
tr:nth-child(even) {
  background-color: rgba(255, 255, 255, 0.015);
}
tr:hover {
  background-color: rgba(59, 130, 246, 0.05);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}
.modal-card {
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  width: 100%;
  max-width: 700px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}
.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--panel-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-header h3 {
  font-size: 1.1rem;
}
.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}
.modal-close:hover {
  color: var(--text-main);
}
.modal-body {
  padding: 20px;
  overflow-y: auto;
}
pre.sql-code {
  background-color: var(--bg-dark);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #60a5fa;
  white-space: pre-wrap;
  overflow-x: auto;
}

.hidden {
  display: none !important;
}

.back-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
}
.back-link:hover {
  text-decoration: underline;
}