:root {
  --color-bg: #f5f4f1;
  --color-surface: #ffffff;
  --color-border: #e2ddd8;
  --color-border-light: #ece9e4;
  --color-primary: #2563a8;
  --color-primary-hover: #1d4f8a;
  --color-primary-muted: #dbeafe;
  --color-success: #166534;
  --color-success-bg: #dcfce7;
  --color-warning: #92400e;
  --color-warning-bg: #fef3c7;
  --color-error: #991b1b;
  --color-error-bg: #fee2e2;
  --color-text: #1c1917;
  --color-text-muted: #78716c;
  --color-text-faint: #a8a29e;
  --sidebar-width: 200px;
  --header-height: 52px;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-lg: 0 2px 8px rgba(0,0,0,0.08), 0 8px 24px rgba(0,0,0,0.07);
}

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

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
}

/* =========================================================================
   App shell — fixed header + fixed sidebar + scrollable main
========================================================================= */

.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0 1.5rem;
  z-index: 100;
}

.app-header-logo {
  width: 26px;
  height: 26px;
  background: var(--color-primary);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.app-header-logo svg {
  width: 14px;
  height: 14px;
  fill: white;
}

.app-header h1 {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.app-header p {
  font-size: 0.78rem;
  color: var(--color-text-faint);
  margin-left: auto;
}

/* Sidebar */

.stepper {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: 1.5rem 0;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  z-index: 90;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.65rem 1.25rem;
  border-left: 3px solid transparent;
  transition: background 0.15s, border-color 0.15s;
  position: relative;
}

.step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: calc(1.25rem + 11px);
  top: calc(0.65rem + 24px);
  width: 1px;
  height: calc(100% - 0.65rem - 14px);
  background: var(--color-border);
}

.step.done:not(:last-child)::after { background: var(--color-primary); opacity: 0.4; }

.step.active {
  background: color-mix(in srgb, var(--color-primary) 6%, transparent);
  border-left-color: var(--color-primary);
}

.step-circle {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid var(--color-border);
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--color-text-muted);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: all 0.15s;
}

.step.active .step-circle {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: white;
}

.step.done .step-circle {
  border-color: var(--color-success);
  background: var(--color-success);
  color: white;
}

.step-label-wrap { padding-top: 2px; }

.step-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  line-height: 1.2;
}

.step-sublabel {
  font-size: 0.68rem;
  color: var(--color-text-faint);
  margin-top: 1px;
}

.step.active .step-label { color: var(--color-primary); }
.step.done .step-label { color: var(--color-success); }

/* Main content */

main {
  margin-top: var(--header-height);
  margin-left: var(--sidebar-width);
  padding: 2rem 2.5rem;
  min-height: calc(100vh - var(--header-height));
}

/* =========================================================================
   Card
========================================================================= */

.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
  padding: 1.75rem 2rem;
  margin-bottom: 1.25rem;
  max-width: 100%;
}

.card-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border-light);
}

.card-header h2 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.card-header .subtitle {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  margin-top: 0.2rem;
  line-height: 1.5;
}

/* =========================================================================
   Forms
========================================================================= */

.field { margin-bottom: 0.9rem; }

.field label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  margin-bottom: 0.28rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.field input, .field select {
  width: 100%;
  padding: 0.48rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.12s, box-shadow 0.12s;
  background: var(--color-bg);
  color: var(--color-text);
}

.field input:focus, .field select:focus {
  border-color: var(--color-primary);
  background: white;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 12%, transparent);
}

.field .hint {
  font-size: 0.72rem;
  color: var(--color-text-faint);
  margin-top: 0.22rem;
}

/* =========================================================================
   Buttons
========================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background 0.12s, box-shadow 0.12s, opacity 0.12s;
  text-decoration: none;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 1px 2px rgba(37,99,168,0.2);
}
.btn-primary:not(:disabled):hover {
  background: var(--color-primary-hover);
  box-shadow: 0 2px 6px rgba(37,99,168,0.28);
}

.btn-secondary {
  background: white;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:not(:disabled):hover { background: var(--color-bg); }

.btn-success {
  background: var(--color-success);
  color: white;
  box-shadow: 0 1px 2px rgba(22,101,52,0.2);
}
.btn-success:not(:disabled):hover { background: #14532d; }

.btn-xero {
  background: #0078c8;
  color: white;
  box-shadow: 0 1px 2px rgba(0,120,200,0.2);
}
.btn-xero:not(:disabled):hover {
  background: #005fa3;
  box-shadow: 0 2px 6px rgba(0,120,200,0.28);
}

.btn-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 1.1rem;
  flex-wrap: wrap;
  align-items: center;
}

/* =========================================================================
   Status chips & badges
========================================================================= */

.connected-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.22rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.connected-chip.ok {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid color-mix(in srgb, var(--color-success) 25%, transparent);
}
.connected-chip.pending {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid color-mix(in srgb, var(--color-warning) 25%, transparent);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.12rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge-draft    { background: #f1f5f9; color: #475569; }
.badge-warning  { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-sent     { background: var(--color-primary-muted); color: var(--color-primary); }
.badge-accepted { background: var(--color-success-bg); color: var(--color-success); }
.badge-declined { background: #fce7f3; color: #9d174d; }
.badge-invoiced { background: #ede9fe; color: #5b21b6; }
.badge-deleted  { background: var(--color-error-bg); color: var(--color-error); }

/* =========================================================================
   Stats row
========================================================================= */

.stats-row {
  display: flex;
  gap: 0.65rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.stat-box {
  flex: 1;
  min-width: 80px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.9rem;
}

.stat-box .stat-num {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.stat-box .stat-label {
  font-size: 0.67rem;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.stat-box.success .stat-num { color: var(--color-success); }
.stat-box.warning .stat-num { color: var(--color-warning); }
.stat-box.error   .stat-num { color: var(--color-error); }

/* =========================================================================
   Table
========================================================================= */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

thead th {
  background: var(--color-bg);
  padding: 0.5rem 0.8rem;
  text-align: left;
  font-weight: 700;
  font-size: 0.65rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

tbody tr { border-bottom: 1px solid var(--color-border-light); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: color-mix(in srgb, var(--color-primary) 3%, transparent); }
tbody td { padding: 0.5rem 0.8rem; vertical-align: middle; }
tbody tr.skip-row td { color: var(--color-text-faint); }

.row-imported td:first-child { border-left: 2px solid var(--color-success); }
.row-skipped  td:first-child { border-left: 2px solid #d97706; }
.row-error    td:first-child { border-left: 2px solid var(--color-error); }

.col-check { width: 2.5rem; text-align: center; padding: 0.5rem 0.4rem; }
th.col-check { padding: 0.55rem 0.4rem; }

.selection-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--color-primary-muted);
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  color: var(--color-primary);
}

#selection-count { font-weight: 600; margin-right: auto; }

.btn-sm { padding: 0.25rem 0.65rem; font-size: 0.8rem; }

/* =========================================================================
   Filter row
========================================================================= */

.filter-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.filter-row select, .filter-row input {
  padding: 0.38rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  background: white;
  color: var(--color-text);
  outline: none;
  transition: border-color 0.12s, box-shadow 0.12s;
}

.filter-row select:focus, .filter-row input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 12%, transparent);
}

/* =========================================================================
   Alert
========================================================================= */

.alert {
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
  border-left: 3px solid;
}

.alert-info    { background: #eff6ff; border-color: var(--color-primary); color: #1e40af; }
.alert-success { background: var(--color-success-bg); border-color: var(--color-success); color: var(--color-success); }
.alert-error   { background: var(--color-error-bg); border-color: var(--color-error); color: var(--color-error); }
.alert-warning { background: var(--color-warning-bg); border-color: #d97706; color: var(--color-warning); }

/* =========================================================================
   Divider
========================================================================= */

.divider {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin: 1.25rem 0;
}

/* =========================================================================
   Pagination
========================================================================= */

.pagination-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  margin-top: 0.65rem;
}

.pagination-row .page-info {
  font-size: 0.76rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* =========================================================================
   Spinner overlay
========================================================================= */

.spinner-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(245,244,241,0.8);
  backdrop-filter: blur(2px);
  z-index: 999;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.65rem;
}

.spinner-overlay.active { display: flex; }

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.spinner-msg {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* =========================================================================
   Toast
========================================================================= */

.toast-container {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  z-index: 1000;
}

.toast {
  padding: 0.75rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  max-width: 360px;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.16s ease;
  border-left: 3px solid;
  background: white;
  line-height: 1.4;
}

.toast-success { color: var(--color-success); border-color: var(--color-success); }
.toast-warning { color: var(--color-warning); border-color: #d97706; }
.toast-error   { color: var(--color-error);   border-color: var(--color-error); }

@keyframes slideIn {
  from { opacity: 0; transform: translateX(6px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* =========================================================================
   Modal
========================================================================= */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(28, 25, 23, 0.45);
  backdrop-filter: blur(2px);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.15s ease;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
  margin: 1rem;
  animation: slideUp 0.18s ease;
}

.modal-header {
  padding: 1.25rem 1.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border-light);
}

.modal-header h3 {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.modal-body {
  padding: 1rem 1.5rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.modal-body strong {
  color: var(--color-text);
  font-weight: 600;
}

.modal-footer {
  padding: 0.75rem 1.5rem 1.25rem;
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =========================================================================
   Utilities
========================================================================= */

.hidden { display: none !important; }