/* WHSIQ Design System - Desktop Surface
 *
 * Target aesthetic: Linear/Notion — clean, high-contrast, information-dense.
 * Colour is NEVER the sole indicator of state (WCAG 2.2 AA).
 * All status indicators pair colour with icon or text label.
 */

:root {
  /* Neutral palette */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #f0f1f3;
  --bg-sidebar: #1a1a2e;
  --bg-sidebar-hover: #252542;
  --bg-sidebar-active: #2d2d50;

  /* Text */
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --text-inverse: #f9fafb;
  --text-sidebar: #c4c4d4;

  /* Accent */
  --accent-primary: #4f46e5;
  --accent-primary-hover: #4338ca;
  --accent-success: #059669;
  --accent-warning: #d97706;
  --accent-danger: #dc2626;

  /* Borders */
  --border-primary: #e5e7eb;
  --border-secondary: #d1d5db;

  /* KPI card states */
  --kpi-good-bg: #ecfdf5;
  --kpi-good-border: #a7f3d0;
  --kpi-good-text: #065f46;
  --kpi-warning-bg: #fffbeb;
  --kpi-warning-border: #fde68a;
  --kpi-warning-text: #92400e;
  --kpi-danger-bg: #fef2f2;
  --kpi-danger-border: #fecaca;
  --kpi-danger-text: #991b1b;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-secondary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Layout: sidebar + main */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar — noun-first IA for desktop (Records, Templates, Settings) */
.sidebar {
  width: 240px;
  min-width: 240px;
  background: var(--bg-sidebar);
  color: var(--text-sidebar);
  display: flex;
  flex-direction: column;
  border-right: 1px solid rgba(255,255,255,0.06);
}

.sidebar-brand {
  padding: var(--space-lg) var(--space-md);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-inverse);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.sidebar-brand .brand-icon {
  width: 28px;
  height: 28px;
  background: var(--accent-primary);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: white;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-sm);
  overflow-y: auto;
}

.sidebar-section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  padding: var(--space-md) var(--space-sm) var(--space-xs);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 12px;
  border-radius: 6px;
  color: var(--text-sidebar);
  text-decoration: none;
  font-size: 14px;
  cursor: pointer;
  transition: background var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.sidebar-link:hover { background: var(--bg-sidebar-hover); color: var(--text-inverse); }
.sidebar-link.active { background: var(--bg-sidebar-active); color: var(--text-inverse); }

.sidebar-link .link-icon {
  width: 18px;
  text-align: center;
  font-size: 14px;
  opacity: 0.7;
}

.sidebar-link .link-badge {
  margin-left: auto;
  background: var(--accent-danger);
  color: white;
  font-size: 11px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 10px;
  min-width: 20px;
  text-align: center;
}

/* Main content area */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.page-header {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-primary);
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
}

.page-header h1 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.page-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg);
}

/* KPI Bar — 5 KPIs above the fold on 1366x768 */
.kpi-bar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.kpi-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: 8px;
  padding: var(--space-md);
  transition: border-color var(--transition-fast);
}

.kpi-card:hover { border-color: var(--border-secondary); }

.kpi-card .kpi-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.kpi-card .kpi-value {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: var(--space-xs);
}

.kpi-card .kpi-detail {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* KPI state classes — always paired with icon/text, never colour-only */
.kpi-card.state-good { border-left: 3px solid var(--accent-success); }
.kpi-card.state-good .kpi-value { color: var(--kpi-good-text); }
.kpi-card.state-warning { border-left: 3px solid var(--accent-warning); }
.kpi-card.state-warning .kpi-value { color: var(--kpi-warning-text); }
.kpi-card.state-danger { border-left: 3px solid var(--accent-danger); }
.kpi-card.state-danger .kpi-value { color: var(--kpi-danger-text); }

.kpi-card .kpi-citation {
  font-size: 10px;
  color: var(--text-tertiary);
  margin-top: var(--space-xs);
  line-height: 1.3;
  border-top: 1px dashed var(--border-primary);
  padding-top: 4px;
}

.kpi-card .kpi-note {
  font-size: 11px;
  color: var(--accent-warning);
  margin-top: var(--space-xs);
  line-height: 1.3;
}

.kpi-card:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.kpi-meta-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
  font-size: 12px;
  color: var(--text-secondary);
}

.kpi-meta-actions { display: flex; gap: var(--space-xs); }

/* Print: tight layout that fits a KPI snapshot on one page */
@media print {
  .sidebar, .kpi-meta-actions, .page-header > div:last-child { display: none !important; }
  .main-content { margin-left: 0 !important; }
  .kpi-bar { grid-template-columns: repeat(5, 1fr) !important; page-break-inside: avoid; }
  .kpi-card { border: 1px solid #333 !important; }
  .content-grid { page-break-inside: avoid; }
  body { background: #fff !important; color: #000 !important; }
}

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

/* Cards */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: 8px;
  overflow: hidden;
}

.card-header {
  padding: var(--space-md);
  border-bottom: 1px solid var(--border-primary);
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

/* Activity feed */
.activity-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--bg-tertiary);
  font-size: 13px;
}

.activity-item:last-child { border-bottom: none; }

.activity-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
}

.activity-icon.type-take5 { background: #dbeafe; color: #1d4ed8; }
.activity-icon.type-incident { background: #fef2f2; color: #dc2626; }
.activity-icon.type-near_miss { background: #fffbeb; color: #d97706; }
.activity-icon.type-hazard { background: #fef3c7; color: #b45309; }
.activity-icon.type-swms { background: #f0fdf4; color: #16a34a; }

.activity-meta {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* Records table */
.records-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.records-table th {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 2px solid var(--border-primary);
  background: var(--bg-secondary);
}

.records-table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--bg-tertiary);
}

.records-table tr:hover { background: var(--bg-secondary); }

/* Status badges — colour + text label (never colour-only) */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.badge-submitted { background: #dbeafe; color: #1e40af; }
.badge-submitted::before { content: "\25CF "; }
.badge-reviewed { background: #f0fdf4; color: #166534; }
.badge-reviewed::before { content: "\2713 "; }
.badge-closed { background: var(--bg-tertiary); color: var(--text-secondary); }
.badge-closed::before { content: "\2014 "; }
.badge-open { background: #dbeafe; color: #1e40af; }
.badge-open::before { content: "\25CB "; }
.badge-overdue { background: #fef2f2; color: #991b1b; }
.badge-overdue::before { content: "\26A0 "; }
.badge-in_progress { background: #fffbeb; color: #92400e; }
.badge-in_progress::before { content: "\25B6 "; }

/* Type badges */
.type-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.type-badge-take5 { background: #dbeafe; color: #1d4ed8; }
.type-badge-incident { background: #fef2f2; color: #dc2626; }
.type-badge-near_miss { background: #fffbeb; color: #d97706; }
.type-badge-hazard { background: #fef3c7; color: #b45309; }
.type-badge-swms { background: #f0fdf4; color: #16a34a; }

/* Risk distribution chart (CSS-only bar chart) */
.risk-bar {
  display: flex;
  height: 24px;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--space-sm);
}

.risk-bar .segment {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: white;
  transition: width var(--transition-normal);
}

.risk-bar .segment-low { background: var(--accent-success); }
.risk-bar .segment-medium { background: var(--accent-warning); }
.risk-bar .segment-high { background: var(--accent-danger); }

.risk-legend {
  display: flex;
  gap: var(--space-md);
  font-size: 12px;
  color: var(--text-secondary);
}

.risk-legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.risk-legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

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

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border-color: var(--border-secondary);
}

.btn-secondary:hover { background: var(--bg-secondary); }

.btn-sm { padding: 4px 8px; font-size: 12px; }

/* Filter bar */
.filter-bar {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  align-items: center;
}

.filter-bar select,
.filter-bar input {
  padding: 6px 10px;
  border: 1px solid var(--border-secondary);
  border-radius: 6px;
  font-size: 13px;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.filter-bar-rich { flex-wrap: wrap; }
.filter-bar .filter-count {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-secondary);
}

.record-row:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: -2px;
}

.record-detail-toolbar {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

/* Take 5 Form — mobile-first design adapted for desktop */
.form-container {
  max-width: 640px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.form-hint {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-secondary);
  border-radius: 6px;
  font-size: 14px;
  transition: border-color var(--transition-fast);
  font-family: var(--font-sans);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-textarea { min-height: 80px; resize: vertical; }

/* Checkbox/toggle for boolean fields */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  min-height: 48px; /* WCAG 2.2 AA touch target */
  cursor: pointer;
}

.form-check input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--accent-primary);
}

/* Hazard pills */
.hazard-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.hazard-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 12px;
  border: 1px solid var(--border-secondary);
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--bg-primary);
  min-height: 36px;
}

.hazard-pill:hover { border-color: var(--accent-primary); }
.hazard-pill.selected { background: var(--accent-primary); color: white; border-color: var(--accent-primary); }

.hazard-pill .risk-select {
  padding: 2px 4px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 4px;
  font-size: 11px;
  background: rgba(255,255,255,0.2);
  color: inherit;
}

/* Slice 7.2 — tier-one form chrome */
.legal-ref {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
  background: var(--bg-secondary);
  border-left: 2px solid var(--accent-primary);
  padding: 2px 8px;
  margin-top: var(--space-xs);
  border-radius: 2px;
  letter-spacing: 0.02em;
}

.field-error {
  color: var(--accent-danger);
  font-size: 12px;
  margin-top: 4px;
  line-height: 1.4;
}

.input-error,
.form-input.input-error,
.form-select.input-error {
  border-color: var(--accent-danger) !important;
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12);
}

.form-draft-banner {
  background: #fff8e6;
  border: 1px solid #f0c04a;
  color: #7a5b00;
  padding: var(--space-sm) var(--space-md);
  border-radius: 6px;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  font-size: 13px;
}

.signature-pad {
  width: 100%;
  max-width: 100%;
  height: 150px;
  border: 1px dashed var(--border-secondary);
  border-radius: 6px;
  background: var(--bg-primary);
  touch-action: none;
  cursor: crosshair;
  display: block;
}

/* Success animation */
.submit-success {
  text-align: center;
  padding: var(--space-xl);
}

.submit-success .checkmark {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--accent-success);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin: 0 auto var(--space-md);
  animation: checkmark-pop 0.3s ease;
}

@keyframes checkmark-pop {
  0% { transform: scale(0); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

/* Toast notifications */
.toast-container {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 1000;
}

.toast {
  background: var(--bg-sidebar);
  color: var(--text-inverse);
  padding: var(--space-sm) var(--space-md);
  border-radius: 6px;
  font-size: 13px;
  margin-top: var(--space-sm);
  animation: toast-in 0.3s ease;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

@keyframes toast-in {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Loading skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: 4px;
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Responsive — dashboard still works at 1366x768 */
@media (max-width: 1366px) {
  .kpi-bar { gap: var(--space-sm); }
  .kpi-card .kpi-value { font-size: 24px; }
  .sidebar { width: 200px; min-width: 200px; }
}

/* Chain verification panel */
.chain-panel {
  padding: var(--space-md);
  background: var(--bg-secondary);
  border-radius: 6px;
  margin-top: var(--space-md);
}

.chain-valid {
  color: var(--accent-success);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.chain-invalid {
  color: var(--accent-danger);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.chain-version {
  padding: var(--space-sm);
  border-left: 2px solid var(--border-secondary);
  margin: var(--space-sm) 0 var(--space-sm) var(--space-md);
  font-size: 12px;
  font-family: var(--font-mono);
}

.chain-version .hash { color: var(--text-tertiary); word-break: break-all; }

/* Loading screen (inline critical path) */
.loading-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: var(--bg-secondary);
  font-family: var(--font-sans);
  color: var(--text-secondary);
}

.loading-center { text-align: center; }
.loading-skeleton { width: 200px; height: 24px; margin: 0 auto 12px; }
.loading-label { font-size: 14px; }