/* =========================================================
   Unified Accounting Tools - Monochrome Minimalist Ledger
   Inspired by High-Contrast Financial Architecture
   Typography: Plus Jakarta Sans + JetBrains Mono
   Icons: Google Material Symbols Outlined
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200');

:root {
  /* Monochrome Palette */
  --bg-canvas: #f8f9fa;
  --surface-pure: #ffffff;
  --surface-subtle: #f9fafb;
  --surface-muted: #f1f3f5;
  --surface-container: #f3f4f6;

  --border-subtle: #f3f4f6;
  --border-medium: #e5e7eb;
  --border-strong: #d1d5db;

  --primary: #111827;
  --primary-hover: #000000;
  --on-primary: #ffffff;

  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;

  /* Semantic Audit Badges */
  --audit-match-bg: #ecfdf5;
  --audit-match-text: #065f46;
  --audit-match-border: #a7f3d0;
  --audit-match-dot: #10b981;

  --audit-variance-bg: #fffbeb;
  --audit-variance-text: #92400e;
  --audit-variance-border: #fde68a;
  --audit-variance-dot: #f59e0b;

  --audit-risk-bg: #fef2f2;
  --audit-risk-text: #991b1b;
  --audit-risk-border: #fecaca;
  --audit-risk-dot: #ef4444;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -4px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Border Radii */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Material Symbols alignment helper */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 20;
  vertical-align: middle;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Monospace text for financial amounts, tax IDs, codes */
.font-mono, .code-mono {
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

/* Header & Navigation Bar */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-medium);
  height: 64px;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.brand-title {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-badge {
  font-size: 0.6875rem;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  background: var(--surface-container);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

/* Buttons - Pill Silhouette */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  line-height: 1.25;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--surface-pure);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--surface-subtle);
  border-color: var(--border-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--surface-muted);
  color: var(--text-primary);
}

.btn-danger {
  background: var(--audit-risk-bg);
  color: var(--audit-risk-text);
  border: 1px solid var(--audit-risk-border);
}

.btn-danger:hover {
  background: #fee2e2;
  color: #7f1d1d;
}

.btn-sm {
  padding: 0.35rem 0.85rem;
  font-size: 0.8125rem;
}

/* Layout Container */
.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 2rem 2rem 4rem 2rem;
}

/* Cards & Containers - Crisp White with Hairline Borders */
.card {
  background: var(--surface-pure);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

/* Badges & Status Pills */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.badge-pill::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  display: inline-block;
}

.badge-match {
  background: var(--audit-match-bg);
  color: var(--audit-match-text);
  border: 1px solid var(--audit-match-border);
}
.badge-match::before { background: var(--audit-match-dot); }

.badge-variance {
  background: var(--audit-variance-bg);
  color: var(--audit-variance-text);
  border: 1px solid var(--audit-variance-border);
}
.badge-variance::before { background: var(--audit-variance-dot); }

.badge-risk {
  background: var(--audit-risk-bg);
  color: var(--audit-risk-text);
  border: 1px solid var(--audit-risk-border);
}
.badge-risk::before { background: var(--audit-risk-dot); }

.badge-neutral {
  background: var(--surface-muted);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}
.badge-neutral::before { background: var(--text-secondary); }

/* Form Controls */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
  letter-spacing: -0.01em;
}

.form-control {
  width: 100%;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-medium);
  background: var(--surface-pure);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--text-primary);
  outline: none;
  transition: all 0.15s ease;
}

.form-control-rect {
  border-radius: var(--radius-md);
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.08);
}

/* Tool Grid Cards */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  background: var(--surface-pure);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.15s ease, border-color 0.15s ease;
}

.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.tool-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--surface-container);
  color: var(--primary);
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  transition: background 0.15s ease, color 0.15s ease;
}

.tool-card:hover .tool-card-icon {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.tool-card-category {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.tool-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.tool-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.tool-card-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Data Tables */
.table-container {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  background: var(--surface-pure);
}

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

thead th {
  background: var(--surface-subtle);
  color: var(--text-secondary);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border-medium);
}

tbody td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.875rem;
  color: var(--text-primary);
  vertical-align: middle;
}

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

tbody tr:hover td {
  background: var(--surface-subtle);
}

/* Sub-nav Tabs (e.g. Admin Users / Logs) */
.sub-nav {
  display: flex;
  gap: 0.5rem;
  background: var(--surface-container);
  padding: 0.35rem;
  border-radius: var(--radius-full);
  margin-bottom: 2rem;
  width: fit-content;
  border: 1px solid var(--border-medium);
}

.sub-nav-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.15s ease;
}

.sub-nav-item.active {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.sub-nav-item:not(.active):hover {
  color: var(--text-primary);
}

/* Alerts */
.alert {
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.alert-error {
  background: var(--audit-risk-bg);
  color: var(--audit-risk-text);
  border: 1px solid var(--audit-risk-border);
}

.alert-success {
  background: var(--audit-match-bg);
  color: var(--audit-match-text);
  border: 1px solid var(--audit-match-border);
}

.alert-info {
  background: #eff6ff;
  color: #1e40af;
  border: 1px solid #bfdbfe;
}

/* Modals & Dialogs */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, 0.45);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1.5rem;
}

.modal-sheet {
  background: #ffffff;
  width: 100%;
  max-width: 840px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-medium);
  padding: 2.25rem;
  box-shadow: var(--shadow-xl);
  max-height: 88vh;
  overflow-y: auto;
}

.modal-sheet-sm {
  max-width: 520px;
}

/* Tool Grid Selection */
.tool-grid-selection {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.75rem;
  max-height: 360px;
  overflow-y: auto;
  padding: 0.85rem;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  background: var(--surface-subtle);
}

.tool-check-card {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: #ffffff;
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  position: relative;
}

.tool-check-card:hover {
  border-color: var(--primary);
  background: var(--surface-container);
}

.tool-check-card.is-checked {
  border-color: var(--primary);
  background: #ffffff;
  box-shadow: 0 0 0 1px var(--primary);
}

.tool-check-card input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
}

.tool-check-card-body {
  flex: 1;
  min-width: 0;
}

.tool-check-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.tool-check-card-name {
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--text-primary);
  line-height: 1.3;
}

.tool-check-card-category {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tool-check-card-desc {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.35rem;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}