:root {
  /* RDocs Brand Colors */
  --rd-red: #d32f2f;
  --rd-red-light: #ff6659;
  --rd-red-dark: #9a0007;
  --rd-gray-100: #f8f9fa;
  --rd-gray-200: #e9ecef;
  --rd-gray-300: #dee2e6;
  --rd-gray-400: #ced4da;
  --rd-gray-600: #6c757d;
  --rd-gray-800: #343a40;
  --rd-black: #1a1a1a;
  --rd-white: #ffffff;
  --rd-success: #4caf50;
  --rd-warning: #ff9800;

  /* Spacing & Borders */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  --border: 1px solid var(--rd-gray-300);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: #f4f6f8;
  color: var(--rd-black);
  line-height: 1.5;
  min-height: 100vh;
}

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

.header {
  background: var(--rd-white);
  border-bottom: var(--border);
  padding: 0 var(--space-xl);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  text-decoration: none;
  color: var(--rd-red);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -1px;
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--rd-gray-600);
  font-weight: 500;
  padding: var(--space-sm) 0;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.nav-link:hover {
  color: var(--rd-red);
}

.nav-link.active {
  color: var(--rd-red);
  border-bottom-color: var(--rd-red);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--rd-gray-800);
}

/* Main Content */
main {
  flex: 1;
  padding: var(--space-xl);
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
}

.page-title h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--rd-black);
}

.page-actions {
  display: flex;
  gap: var(--space-md);
}

/* Dashboard Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background: var(--rd-white);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: var(--border);
  box-shadow: var(--shadow);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--rd-gray-600);
  display: block;
  margin-bottom: var(--space-xs);
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--rd-black);
}

.stat-trend {
  font-size: 0.75rem;
  margin-top: var(--space-sm);
  display: flex;
  align-items: center;
  gap: 4px;
}

.trend-up { color: var(--rd-success); }
.trend-down { color: var(--rd-red); }

/* Main Content Area */
.content-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-lg);
}

.card {
  background: var(--rd-white);
  border-radius: var(--radius-md);
  border: var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

.card-header {
  padding: var(--space-lg);
  border-bottom: var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.card-body {
  padding: var(--space-lg);
}

/* Document Table */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  padding: var(--space-md);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--rd-gray-600);
  border-bottom: var(--border);
  font-weight: 600;
}

td {
  padding: var(--space-md);
  border-bottom: var(--border);
  font-size: 0.875rem;
}

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

tr:hover {
  background-color: var(--rd-gray-100);
}

.badge {
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-active { background: #e8f5e9; color: #2e7d32; }
.badge-expired { background: #ffebee; color: #c62828; }
.badge-pending { background: #fff3e0; color: #ef6c00; }

.badge-neutral { background: var(--rd-gray-100); color: var(--rd-gray-800); }

/* Progress Bars */
.progress-bar {
  width: 100px;
  height: 8px;
  background: var(--rd-gray-200);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
}

.progress-success { background: var(--rd-success); }
.progress-warning { background: var(--rd-warning); }
.progress-danger { background: var(--rd-red); }

/* Typography Helpers */
.text-small { font-size: 0.75rem; }
.text-muted { color: var(--rd-gray-600); }
.font-bold { font-weight: 600; }

/* Placeholder Graphics */
.placeholder-chart {
  width: 100%;
  height: 240px;
  background: linear-gradient(180deg, #f8f9fa 0%, #ffffff 100%);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 20px;
}

.chart-bar {
  flex: 1;
  background: var(--rd-red);
  border-radius: 4px 4px 0 0;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.chart-bar:hover {
  opacity: 1;
}

.placeholder-map {
  width: 100%;
  aspect-ratio: 16/9;
  background-color: #f0f4f8;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background-image: radial-gradient(var(--rd-gray-300) 1px, transparent 1px);
  background-size: 20px 20px;
}

.map-marker {
  width: 12px;
  height: 12px;
  background: var(--rd-red);
  border-radius: 50%;
  position: absolute;
  box-shadow: 0 0 0 4px rgba(211, 47, 47, 0.2);
}

/* Icons */
.icon {
  width: 20px;
  height: 20px;
}

.icon-red { color: var(--rd-red); }

/* Buttons */
.btn {
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-size: 0.875rem;
  transition: all 0.2s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}

.btn-primary {
  background: var(--rd-red);
  color: var(--rd-white);
}

.btn-primary:hover {
  background: var(--rd-red-dark);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--rd-gray-300);
  color: var(--rd-gray-800);
}

.btn-outline:hover {
  background: var(--rd-gray-100);
}

/* Search bar */
.search-container {
  position: relative;
  width: 300px;
}

.search-input {
  width: 100%;
  padding: 10px 16px 10px 40px;
  border: var(--border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--rd-gray-600);
}

/* Detail Modal Style (as a page state) */
.reader-profile {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.avatar {
  width: 40px;
  height: 40px;
  background: var(--rd-gray-300);
  border-radius: 50%;
  flex-shrink: 0;
}

.reader-info div:first-child {
  font-weight: 600;
  color: var(--rd-black);
}

.reader-info div:last-child {
  font-size: 0.75rem;
  color: var(--rd-gray-600);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade {
  animation: fadeIn 0.4s ease-out forwards;
}