:root {
  /* Color Palette - Derived from SVG Wireframes */
  --bg-main: #f8fafc;
  --card-bg: #ffffff;
  --card-header: #f1f5f9;
  --border-light: #e2e8f0;
  --border-input: #cbd5e1;

  /* Typography Colors */
  --text-heading: #0f172a;
  --text-body: #334155;
  --text-label: #475569;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;

  /* Brand / Action Colors */
  --primary-navy: #1e3a8a;
  --primary-hover: #172554;
  --accent-blue: #38bdf8;
  --success-emerald: #10b981;
  --success-hover: #059669;
  --warning-amber: #f59e0b;
  --danger-rose: #ef4444;

  /* Mobile Dark Theme Colors (2.3.2 Wireframe) */
  --dark-bg: #0f172a;
  --dark-card: #1e293b;
  --dark-header: #1e293b;
  --dark-border: #334155;
  --dark-input-bg: #0f172a;
  --dark-text-heading: #ffffff;
  --dark-text-label: #94a3b8;

  /* Spacing & Borders */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);

  /* Fonts */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Roboto Mono', monospace;
}

/* Reset & Global */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-body);
  line-height: 1.5;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

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

.sidebar {
  width: 260px;
  background-color: #0f172a;
  color: #f8fafc;
  display: flex;
  flex-direction: column;
  border-right: 1px solid #1e293b;
  transition: all 0.3s ease;
}

.sidebar-header {
  padding: 20px;
  background-color: #1e293b;
  border-bottom: 1px solid #334155;
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-header h2 {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.5px;
}

.sidebar-nav {
  padding: 15px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-section-title {
  font-size: 11px;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  margin-top: 15px;
  margin-bottom: 5px;
  padding-left: 10px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  color: #94a3b8;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.nav-item:hover, .nav-item.active {
  background-color: var(--primary-navy);
  color: #ffffff;
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

.topbar {
  height: 60px;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.page-container {
  padding: 24px;
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
}

/* Card Wrapper - Matching Wireframes 1.1-2.3.1 */
.card-wrapper {
  background-color: var(--card-bg);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  margin-bottom: 24px;
}

.card-header-banner {
  background-color: var(--card-header);
  border-bottom: 2px solid var(--border-light);
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header-banner h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-heading);
}

.card-header-banner p {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.card-body {
  padding: 24px;
}

/* Form Controls & Grid */
.form-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.col-12 { grid-column: span 12; }
.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }
.col-3 { grid-column: span 3; }
.col-2 { grid-column: span 2; }

@media (max-width: 768px) {
  .col-8, .col-6, .col-4, .col-3, .col-2 { grid-column: span 12; }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-label);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-control {
  width: 100%;
  height: 42px;
  padding: 8px 12px;
  font-size: 14px;
  font-family: inherit;
  background-color: #ffffff;
  border: 2px solid var(--border-input);
  border-radius: var(--radius-md);
  color: var(--text-heading);
  outline: none;
  transition: border-color 0.2s ease;
}

.form-control:focus {
  border-color: var(--primary-navy);
}

.form-control.readonly {
  background-color: #f8fafc;
  color: var(--text-muted);
}

textarea.form-control {
  height: 110px;
  resize: vertical;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%2364748b' viewBox='0 0 24 24'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: 36px;
}

/* Action Strip */
.card-actions-bar {
  border-top: 2px solid var(--border-light);
  padding: 16px 24px;
  background-color: #ffffff;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--primary-navy);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-success {
  background-color: var(--success-emerald);
  color: #ffffff;
}

.btn-success:hover {
  background-color: var(--success-hover);
}

.btn-secondary {
  background-color: #f1f5f9;
  color: var(--text-label);
  border: 1px solid var(--border-light);
}

.btn-danger {
  background-color: var(--danger-rose);
  color: #ffffff;
}

/* Data Table */
.data-table-container {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th {
  background-color: var(--card-header);
  color: var(--text-label);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 12px 16px;
  border-bottom: 2px solid var(--border-light);
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-light);
  font-size: 13px;
}

.data-table tr:hover {
  background-color: #f8fafc;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-success { background-color: #d1fae5; color: #065f46; }
.badge-warning { background-color: #fef3c7; color: #92400e; }
.badge-danger { background-color: #ffe4e6; color: #9f1239; }
.badge-info { background-color: #e0f2fe; color: #075985; }

/* Photo Upload Box Component */
.photo-upload-slot {
  border: 2px dashed var(--border-input);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
  background-color: #ffffff;
  cursor: pointer;
  transition: all 0.2s ease;
}

.photo-upload-slot:hover {
  border-color: var(--primary-navy);
  background-color: #f8fafc;
}

/* Mobile Dark Theme - Matching Wireframe 2.3.2 */
body.mobile-theme {
  background-color: var(--dark-bg);
  color: #ffffff;
}

body.mobile-theme .card-wrapper {
  background-color: var(--dark-card);
  border-color: var(--dark-border);
}

body.mobile-theme .card-header-banner {
  background-color: var(--dark-card);
  border-bottom-color: var(--dark-border);
}

body.mobile-theme .card-header-banner h1 {
  color: #ffffff;
}

body.mobile-theme .form-control {
  background-color: var(--dark-input-bg);
  border-color: var(--dark-border);
  color: #ffffff;
}

body.mobile-theme label {
  color: var(--dark-text-label);
}