:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-card: #141c2e;
  --bg-card-hover: #192338;
  --border-color: #243048;
  --border-subtle: #1c273c;
  
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --primary-accent: #0284c7;
  --primary-accent-hover: #0369a1;
  --primary-glow: rgba(2, 132, 199, 0.25);
  
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --success-border: rgba(16, 185, 129, 0.3);
  
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.12);
  --warning-border: rgba(245, 158, 11, 0.3);
  
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.12);
  --danger-border: rgba(239, 68, 68, 0.3);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  
  --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 {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ==========================================================================
   PIN LOCK OVERLAY
   ========================================================================== */
.pin-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 20%, #152238 0%, #080d16 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(12px);
}

.pin-overlay.hidden {
  display: none;
}

.pin-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.04);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.brand-icon {
  font-size: 1.5rem;
}

.brand-title {
  display: block;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: -0.01em;
  color: #e0f2fe;
}

.brand-sub {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.pin-header h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.pin-header p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
}

.pin-inputs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.pin-digit {
  width: 46px;
  height: 56px;
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  background: var(--bg-secondary);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  outline: none;
  transition: all 0.15s ease;
}

.pin-digit:focus {
  border-color: var(--primary-accent);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: #172236;
}

.pin-error {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: #fca5a5;
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  margin-bottom: 1.25rem;
  animation: shake 0.4s ease;
}

.pin-error.hidden {
  display: none;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.pin-keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  width: 100%;
  margin-bottom: 1.5rem;
}

.key-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.12s ease;
}

.key-btn:hover {
  background: var(--bg-tertiary);
  border-color: #374151;
}

.key-btn:active {
  transform: scale(0.96);
  background: var(--primary-accent);
}

.key-clear, .key-back {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.pin-footer {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   MAIN DASHBOARD LAYOUT
   ========================================================================== */
.app-container.hidden {
  display: none;
}

.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-left, .nav-center, .nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-emoji {
  font-size: 1.6rem;
}

.brand-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: #f8fafc;
}

.portal-tag {
  font-size: 0.725rem;
  color: var(--text-muted);
}

.control-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.nav-select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  outline: none;
  cursor: pointer;
}

.nav-select:focus {
  border-color: var(--primary-accent);
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.status-pill.pass {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: #34d399;
}

.status-pill.fail {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: #f87171;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  border: none;
}

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

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

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: #374151;
  color: var(--text-primary);
}

/* ==========================================================================
   BANNER
   ========================================================================== */
.preview-banner {
  background: linear-gradient(90deg, #1e1b4b 0%, #172554 100%);
  border-bottom: 1px solid #3730a3;
  padding: 0.65rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
}

.banner-badge {
  background: #4338ca;
  color: #c7d2fe;
  font-weight: 700;
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  letter-spacing: 0.03em;
  margin-right: 0.85rem;
}

.banner-text {
  color: #e0e7ff;
  flex: 1;
}

.pill-secure {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #6ee7b7;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.725rem;
  font-weight: 600;
}

/* ==========================================================================
   WORKSPACE & SIDEBAR
   ========================================================================== */
.workspace {
  display: flex;
  min-height: calc(100vh - 105px);
}

.sidebar {
  width: 280px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: 1.25rem 0.75rem;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 0 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 0.5rem;
}

.sheet-count {
  background: var(--bg-tertiary);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

.sheet-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.sheet-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  text-align: left;
  font-size: 0.825rem;
  cursor: pointer;
  transition: all 0.12s ease;
}

.sheet-item:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.sheet-item.active {
  background: var(--bg-card);
  border-color: var(--border-color);
  color: #38bdf8;
  font-weight: 600;
}

.sheet-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  width: 18px;
}

.sheet-name {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-weight: 600;
}

.badge-success { background: var(--success-bg); color: #34d399; }
.badge-warning { background: var(--warning-bg); color: #fbbf24; }
.badge-danger { background: var(--danger-bg); color: #f87171; }
.badge-neutral { background: var(--bg-tertiary); color: var(--text-secondary); }

/* ==========================================================================
   MAIN CONTENT AREA
   ========================================================================== */
.content {
  flex: 1;
  padding: 1.75rem 2.25rem;
  overflow-y: auto;
}

.view-header {
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.view-header h1 {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.view-header p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.view-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
}

/* ==========================================================================
   METRIC CARDS
   ========================================================================== */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
}

.kpi-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.5rem;
}

.kpi-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: #f1f5f9;
  letter-spacing: -0.02em;
}

.kpi-sub {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.35rem;
}

.kpi-card.highlight {
  border-color: rgba(56, 189, 248, 0.4);
  background: linear-gradient(180deg, #132438 0%, #0f192b 100%);
}

.kpi-card.highlight .kpi-value {
  color: #38bdf8;
}

/* ==========================================================================
   DATA TABLES
   ========================================================================== */
.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1.75rem;
  overflow: hidden;
}

.table-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.table-header h3 {
  font-size: 0.95rem;
  font-weight: 600;
}

.table-responsive {
  overflow-x: auto;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.825rem;
  text-align: left;
}

table.data-table th {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

table.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

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

table.data-table tr:hover td {
  background: var(--bg-card-hover);
}

td.num, th.num {
  text-align: right;
  font-family: var(--font-mono);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.725rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.status-badge.pass { background: var(--success-bg); color: #34d399; }
.status-badge.fail { background: var(--danger-bg); color: #f87171; }
.status-badge.warn { background: var(--warning-bg); color: #fbbf24; }

.tr-discrepancy {
  background: rgba(239, 68, 68, 0.08) !important;
}

.tr-discrepancy td {
  border-color: rgba(239, 68, 68, 0.2) !important;
}

/* Callout Box */
.callout {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  margin-bottom: 1.5rem;
  display: flex;
  gap: 0.75rem;
}

.callout-info {
  background: rgba(2, 132, 199, 0.1);
  border: 1px solid rgba(2, 132, 199, 0.3);
  color: #bae6fd;
}

.callout-danger {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: #fecaca;
}

/* ==========================================================================
   AUDIT & SIGNOFF CARDS
   ========================================================================== */
.signoff-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-top: 1rem;
}

.signoff-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-control {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.85rem;
  outline: none;
}

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