/* ══════════════════════════════════════════════════════
   0. VARIABLES
══════════════════════════════════════════════════════ */
:root {
  --sidebar-w: 360px;
  --font-ui: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 10px;
  --radius-sm: 6px;
  --transition: .2s ease;

  /* Light mode */
  --app-bg: #f0f2f7;
  --sidebar-bg: #ffffff;
  --sidebar-border: #e4e7ed;
  --sidebar-text: #1a1d24;
  --sidebar-muted: #6b7280;
  --section-head-bg: #f8f9fc;
  --input-bg: #f8f9fc;
  --input-border: #e4e7ed;
  --input-focus: #5c7cfa;
  --accent: #5c7cfa;
  --accent-light: rgba(92,124,250,.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.12);
}

body.dark {
  --app-bg: #0f1117;
  --sidebar-bg: #1a1d24;
  --sidebar-border: #2d3140;
  --sidebar-text: #e8eaf0;
  --sidebar-muted: #9aa0b0;
  --section-head-bg: #22263a;
  --input-bg: #22263a;
  --input-border: #2d3140;
  --input-focus: #5c7cfa;
  --accent: #5c7cfa;
  --accent-light: rgba(92,124,250,.12);
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-ui);
  background: var(--app-bg);
  color: var(--sidebar-text);
  display: flex;
  font-size: 14px;
  line-height: 1.5;
  transition: background var(--transition), color var(--transition);
}

button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }

/* ══════════════════════════════════════════════════════
   1. THÈMES FACTURE
══════════════════════════════════════════════════════ */
.invoice-paper {
  --inv-paper-bg: #ffffff;
  --inv-stripe: linear-gradient(90deg,#5c7cfa,#a78bfa,#60d4b0);
  --inv-title-color: #5c7cfa;
  --inv-number-color: #111;
  --inv-table-head-bg: #5c7cfa;
  --inv-table-head-text: #ffffff;
  --inv-table-row-even: #f8f9fc;
  --inv-table-row-odd: #ffffff;
  --inv-total-bg: #f4f6fb;
  --inv-grand-total-bg: #5c7cfa;
  --inv-grand-total-text: #ffffff;
  --inv-footer-bg: #f8f9fc;
  --inv-footer-text: #666;
  --inv-bill-label-color: #5c7cfa;
  --inv-border-color: #e4e7ed;
  --inv-text: #1a1d24;
  --inv-muted: #666;
  --inv-notes-bg: #f8f9fc;
  --inv-notes-border: #5c7cfa;
  --font-invoice-title: 'DM Sans', sans-serif;
  --font-invoice-body: 'DM Sans', sans-serif;
}

.invoice-paper.theme-entreprise {
  --inv-stripe: linear-gradient(90deg,#1a3a5c,#4a7ab5,#1a3a5c);
  --inv-title-color: #1a3a5c;
  --inv-table-head-bg: #1a3a5c;
  --inv-grand-total-bg: #1a3a5c;
  --inv-bill-label-color: #1a3a5c;
  --inv-notes-border: #1a3a5c;
  --font-invoice-title: 'IBM Plex Sans', sans-serif;
  --font-invoice-body: 'IBM Plex Sans', sans-serif;
}

.invoice-paper.theme-moderne {
  --inv-stripe: linear-gradient(90deg,#5c7cfa,#a78bfa,#60d4b0);
  --inv-title-color: #5c7cfa;
  --inv-table-head-bg: #5c7cfa;
  --inv-grand-total-bg: #5c7cfa;
  --inv-bill-label-color: #5c7cfa;
  --inv-notes-border: #5c7cfa;
  --font-invoice-title: 'Syne', sans-serif;
  --font-invoice-body: 'DM Sans', sans-serif;
}

.invoice-paper.theme-classique {
  --inv-stripe: linear-gradient(90deg,#222,#666,#222);
  --inv-title-color: #222;
  --inv-table-head-bg: #333;
  --inv-grand-total-bg: #222;
  --inv-bill-label-color: #222;
  --inv-notes-border: #222;
  --font-invoice-title: 'Lora', serif;
  --font-invoice-body: 'Lora', serif;
}

/* ══════════════════════════════════════════════════════
   2. SIDEBAR
══════════════════════════════════════════════════════ */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  transition: width var(--transition), min-width var(--transition), background var(--transition);
  overflow: hidden;
  z-index: 100;
}

.sidebar.collapsed { width: 0; min-width: 0; }

.sidebar-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0 0 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--sidebar-border) transparent;
}
.sidebar-scroll::-webkit-scrollbar { width: 4px; }
.sidebar-scroll::-webkit-scrollbar-thumb { background: var(--sidebar-border); border-radius: 4px; }

/* ══════════════════════════════════════════════════════
   3. SIDEBAR HEADER
══════════════════════════════════════════════════════ */
.sidebar-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 16px 14px;
  border-bottom: 1px solid var(--sidebar-border);
  flex-shrink: 0;
}

.logo-mark {
  width: 32px; height: 32px;
  background: linear-gradient(135deg,#5c7cfa,#a78bfa);
  border-radius: 8px;
  flex-shrink: 0;
}

.sidebar-title { display: flex; flex-direction: column; flex: 1; }
.sidebar-title-main { font-weight: 700; font-size: 15px; color: var(--sidebar-text); }
.sidebar-title-sub { font-size: 11px; color: var(--sidebar-muted); }

.sidebar-toggle {
  background: none;
  border: 1px solid var(--sidebar-border);
  border-radius: var(--radius-sm);
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  color: var(--sidebar-muted);
  font-size: 18px;
  transition: all var(--transition);
}
.sidebar-toggle:hover { background: var(--accent-light); color: var(--accent); }

.sidebar-open-btn {
  position: fixed;
  left: 0; top: 50%;
  transform: translateY(-50%);
  z-index: 200;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  width: 24px; height: 48px;
  font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 2px 0 10px rgba(0,0,0,.2);
}

/* Dark mode toggle */
.dark-mode-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--sidebar-border);
  font-size: 12px;
  color: var(--sidebar-muted);
  flex-shrink: 0;
}

.toggle-switch { position: relative; display: inline-block; width: 36px; height: 20px; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-track {
  position: absolute; inset: 0;
  background: var(--input-border);
  border-radius: 20px;
  transition: background var(--transition);
  cursor: pointer;
}
.toggle-track::before {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  left: 3px; top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition);
}
.toggle-switch input:checked + .toggle-track { background: var(--accent); }
.toggle-switch input:checked + .toggle-track::before { transform: translateX(16px); }

/* ══════════════════════════════════════════════════════
   4. THÈME SÉLECTEUR
══════════════════════════════════════════════════════ */
.theme-selector {
  padding: 12px 16px;
  border-bottom: 1px solid var(--sidebar-border);
  flex-shrink: 0;
}

.theme-pills {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

.theme-pill {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px 4px;
  background: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: var(--sidebar-muted);
  transition: all var(--transition);
}
.theme-pill:hover { border-color: var(--accent); color: var(--sidebar-text); }
.theme-pill.active { border-color: var(--accent); color: var(--accent); background: var(--accent-light); font-weight: 600; }

.theme-swatch {
  width: 24px; height: 14px;
  border-radius: 4px;
  display: block;
}

/* ══════════════════════════════════════════════════════
   5. FORM SECTIONS
══════════════════════════════════════════════════════ */
.form-section {
  border-bottom: 1px solid var(--sidebar-border);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--section-head-bg);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--sidebar-text);
  user-select: none;
  transition: background var(--transition);
}
.section-header:hover { background: var(--accent-light); }

.section-icon { font-size: 15px; }
.chevron { margin-left: auto; transition: transform var(--transition); font-size: 12px; color: var(--sidebar-muted); }
.form-section.collapsed .chevron { transform: rotate(-90deg); }
.form-section.collapsed .section-body { display: none; }

.section-body {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ══════════════════════════════════════════════════════
   6. FORM ELEMENTS
══════════════════════════════════════════════════════ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.form-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--sidebar-muted);
  text-transform: uppercase;
  letter-spacing: .4px;
}

.form-input {
  background: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: 13px;
  color: var(--sidebar-text);
  width: 100%;
  transition: border-color var(--transition), background var(--transition);
  resize: vertical;
  outline: none;
}
.form-input:focus { border-color: var(--accent); background: var(--sidebar-bg); }
.form-input::placeholder { color: var(--sidebar-muted); opacity: .6; }

/* ══════════════════════════════════════════════════════
   7. LOGO UPLOAD
══════════════════════════════════════════════════════ */
.logo-upload-area {
  border: 2px dashed var(--input-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--input-bg);
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.logo-upload-area:hover { border-color: var(--accent); background: var(--accent-light); }

.logo-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--sidebar-muted);
  font-size: 12px;
}
.logo-placeholder span:first-child { font-size: 24px; }

/* ══════════════════════════════════════════════════════
   8. ITEMS LIST
══════════════════════════════════════════════════════ */
.item-card {
  background: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: var(--radius-sm);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}

.item-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  font-weight: 700;
  color: var(--sidebar-muted);
  text-transform: uppercase;
  letter-spacing: .4px;
}

.item-delete-btn {
  background: none;
  border: none;
  color: #e05c5c;
  font-size: 16px;
  line-height: 1;
  padding: 0 2px;
  opacity: .7;
  transition: opacity var(--transition);
}
.item-delete-btn:hover { opacity: 1; }

.item-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 5px;
}

.item-total-display {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  text-align: right;
  padding-top: 2px;
}

.btn-add-item {
  background: transparent;
  color: var(--accent);
  border: 1.5px dashed var(--accent);
  padding: 10px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 13px;
  width: 100%;
  transition: all var(--transition);
}
.btn-add-item:hover { background: var(--accent-light); }

/* ══════════════════════════════════════════════════════
   9. SIDEBAR TOTAUX
══════════════════════════════════════════════════════ */
.side-totals {
  margin-top: 8px;
  padding: 10px;
  background: var(--input-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--input-border);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.side-total-row {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--sidebar-muted);
  font-family: var(--font-mono);
}
.side-total-row span:last-child { color: var(--sidebar-text); }
.side-total-grand {
  border-top: 1px solid var(--input-border);
  padding-top: 6px;
  margin-top: 4px;
  font-weight: 700;
  font-size: 13px;
}
.side-total-grand span { color: var(--accent) !important; }

/* ══════════════════════════════════════════════════════
   10. TOGGLE FIELDS (Notes / Banque)
══════════════════════════════════════════════════════ */
.toggle-field {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.toggle-field-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  background: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition);
}
.toggle-field-header:hover { border-color: var(--accent); }
.toggle-field-header.active {
  border-color: var(--accent);
  background: var(--accent-light);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.toggle-field-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--sidebar-text);
}

.toggle-field-body {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  background: var(--input-bg);
  border: 1.5px solid var(--accent);
  border-top: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}
.toggle-field-body.open { display: flex; }

.toggle-field-pill {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
  padding: 2px 7px;
  border-radius: 10px;
  background: var(--input-border);
  color: var(--sidebar-muted);
  transition: all var(--transition);
}
.toggle-field-header.active .toggle-field-pill {
  background: var(--accent);
  color: #fff;
}

/* ══════════════════════════════════════════════════════
   11. MAIN AREA & TOOLBAR
══════════════════════════════════════════════════════ */
.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100vh;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--sidebar-bg);
  border-bottom: 1px solid var(--sidebar-border);
  flex-shrink: 0;
  gap: 12px;
}

.toolbar-left { display: flex; align-items: center; gap: 10px; }
.toolbar-right { display: flex; align-items: center; gap: 8px; }
.toolbar-title { font-weight: 600; font-size: 14px; color: var(--sidebar-text); }

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  padding: 3px 6px;
}

.btn-icon {
  background: none;
  border: none;
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 4px;
  font-size: 16px;
  color: var(--sidebar-text);
  transition: background var(--transition);
}
.btn-icon:hover { background: var(--accent-light); }

#zoomLabel {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--sidebar-muted);
  min-width: 40px;
  text-align: center;
}

.btn {
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { opacity: .88; }
.btn-print { background: var(--input-bg); border: 1px solid var(--input-border); color: var(--sidebar-text); }
.btn-print:hover { border-color: var(--accent); color: var(--accent); }
.btn-secondary { background: var(--input-bg); border: 1px solid var(--input-border); color: var(--sidebar-text); font-size: 12px; }
.btn-danger { background: #fee2e2; border: 1px solid #fca5a5; color: #b91c1c; font-size: 12px; }

/* ══════════════════════════════════════════════════════
   12. PREVIEW CONTAINER
══════════════════════════════════════════════════════ */
.preview-container {
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 30px 20px 40px;
  scrollbar-width: thin;
  scrollbar-color: rgba(128,128,128,.3) transparent;
  background:
    radial-gradient(circle at 20% 80%, rgba(92,124,250,.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(167,139,250,.05) 0%, transparent 50%),
    var(--app-bg);
}
.preview-container::-webkit-scrollbar { width: 6px; height: 6px; }
.preview-container::-webkit-scrollbar-thumb { background: rgba(128,128,128,.3); border-radius: 4px; }

.preview-scaler {
  transform-origin: top center;
  transition: transform var(--transition);
}

/* ══════════════════════════════════════════════════════
   13. INVOICE PAPER
══════════════════════════════════════════════════════ */
.invoice-paper {
  width: 794px;
  min-height: 1100px;
  background: var(--inv-paper-bg);
  border-radius: 6px;
  box-shadow: var(--shadow-lg);
  font-family: var(--font-invoice-body);
  color: var(--inv-text);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

.inv-stripe {
  height: 6px;
  background: var(--inv-stripe);
  flex-shrink: 0;
}

/* Header */
.inv-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 32px 40px 24px;
  gap: 20px;
}

.inv-header-left { display: flex; align-items: flex-start; gap: 16px; flex: 1; }
.inv-header-right { text-align: right; flex-shrink: 0; }

.inv-logo-wrap { flex-shrink: 0; }
.inv-logo-wrap img { max-height: 70px; max-width: 180px; object-fit: contain; }

.inv-company-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--inv-title-color);
  font-family: var(--font-invoice-title);
  margin-bottom: 4px;
}

.inv-company-info {
  font-size: 12px;
  color: var(--inv-muted);
  line-height: 1.6;
}

.inv-title {
  font-family: var(--font-invoice-title);
  font-size: 32px;
  font-weight: 800;
  color: var(--inv-title-color);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.inv-number {
  font-size: 16px;
  font-weight: 600;
  color: var(--inv-number-color);
  margin: 4px 0 8px;
  font-family: var(--font-mono, monospace);
}

.inv-dates {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 12px;
  color: var(--inv-muted);
}

/* Bill to */
.inv-bill {
  padding: 0 40px 24px;
}

.inv-bill-box {
  background: var(--inv-notes-bg, #f8f9fc);
  border-left: 3px solid var(--inv-bill-label-color);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px 18px;
  display: block;
  min-width: 240px;
  max-width: 360px;
}

.inv-bill-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--inv-bill-label-color);
  margin-bottom: 6px;
}

.inv-bill-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--inv-text);
  margin-bottom: 4px;
}

.inv-bill-info {
  font-size: 12px;
  color: var(--inv-muted);
  line-height: 1.6;
}

/* Table */
.inv-table-wrap {
  padding: 0 40px;
  flex: 1;
}

.inv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.inv-table thead tr {
  background: var(--inv-table-head-bg);
  color: var(--inv-table-head-text);
}

.inv-table th {
  padding: 10px 14px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.inv-table th.col-qty,
.inv-table th.col-unit,
.inv-table th.col-total { text-align: right; }

.inv-table tbody tr:nth-child(even) { background: var(--inv-table-row-even); }
.inv-table tbody tr:nth-child(odd) { background: var(--inv-table-row-odd); }

.inv-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--inv-border-color);
  font-size: 13px;
  color: var(--inv-text);
}

.inv-table td.td-qty,
.inv-table td.td-unit,
.inv-table td.td-total { text-align: right; font-family: var(--font-mono, monospace); }

.inv-table td.td-total { font-weight: 600; }

.inv-table .td-desc-sub {
  font-size: 11px;
  color: var(--inv-muted);
  margin-top: 2px;
}

.inv-empty-row td {
  text-align: center;
  color: var(--inv-muted);
  font-style: italic;
  padding: 24px;
}

/* Totaux */
.inv-totals-wrap {
  display: flex;
  justify-content: flex-end;
  padding: 20px 40px;
}

.inv-totals {
  min-width: 280px;
  background: var(--inv-total-bg);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.inv-total-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 16px;
  font-size: 13px;
  color: var(--inv-muted);
  border-bottom: 1px solid var(--inv-border-color);
}

.inv-total-row span:last-child {
  font-family: var(--font-mono, monospace);
  color: var(--inv-text);
  font-weight: 500;
}

.inv-grand-total {
  background: var(--inv-grand-total-bg);
  color: var(--inv-grand-total-text) !important;
  font-size: 15px;
  font-weight: 700;
  border-bottom: none;
}

.inv-grand-total span { color: var(--inv-grand-total-text) !important; }

/* Notes */
.inv-notes-block {
  margin: 0 40px 20px;
  background: var(--inv-notes-bg);
  border-left: 3px solid var(--inv-notes-border);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px 18px;
}

.inv-notes-block-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--inv-notes-border);
  margin-bottom: 6px;
}

.inv-notes-block-body {
  font-size: 12px;
  color: var(--inv-muted);
  line-height: 1.6;
}

/* Banque */
.inv-bank-block {
  margin: 0 40px 20px;
  background: var(--inv-notes-bg);
  border-left: 3px solid var(--inv-notes-border);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px 18px;
}

.inv-bank-block-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--inv-notes-border);
  margin-bottom: 6px;
}

.inv-bank-block-body {
  font-size: 12px;
  color: var(--inv-muted);
  line-height: 1.6;
}

/* Footer */
.inv-footer {
  margin-top: auto;
  background: var(--inv-footer-bg);
  padding: 14px 40px;
  border-top: 1px solid var(--inv-border-color);
}

.inv-payment-terms {
  font-size: 12px;
  color: var(--inv-footer-text);
  text-align: center;
}

/* ══════════════════════════════════════════════════════
   14. TOAST
══════════════════════════════════════════════════════ */
.toast {
  position: fixed;
  bottom: 24px; right: 24px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  background: #1a1d24;
  color: #fff;
  box-shadow: 0 4px 20px rgba(0,0,0,.25);
  transform: translateY(20px);
  opacity: 0;
  pointer-events: none;
  transition: all .3s ease;
  z-index: 9999;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { background: #166534; }
.toast.error { background: #991b1b; }

/* ══════════════════════════════════════════════════════
   15. PDF OVERLAY
══════════════════════════════════════════════════════ */
.pdf-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 9998;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease;
  backdrop-filter: blur(4px);
}
.pdf-overlay.active { opacity: 1; pointer-events: all; }
.pdf-overlay-content {
  background: #fff;
  border-radius: var(--radius);
  padding: 36px 48px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  color: #333;
  font-size: 14px;
}
.pdf-spinner {
  width: 44px; height: 44px;
  border: 3px solid #e0e0e0;
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 16px;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ══════════════════════════════════════════════════════
   16. RESPONSIVE — BACKDROP & MOBILE MENU BUTTON
══════════════════════════════════════════════════════ */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .45);
  z-index: 90;
  opacity: 0;
  transition: opacity var(--transition);
  backdrop-filter: blur(2px);
}
.sidebar-backdrop.active {
  display: block;
  opacity: 1;
}

.btn-mobile-menu {
  display: none;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--sidebar-text);
  transition: all var(--transition);
  flex-shrink: 0;
}
.btn-mobile-menu:hover { background: var(--accent-light); color: var(--accent); }

/* ─────────── TABLETTE (≤ 1024px) ─────────── */
@media (max-width: 1024px) {
  :root { --sidebar-w: 320px; }

  .preview-container { padding: 20px 12px 30px; }

  .inv-header,
  .inv-bill,
  .inv-table-wrap,
  .inv-totals-wrap,
  .inv-notes-block,
  .inv-bank-block,
  .inv-footer {
    padding-left: 28px;
    padding-right: 28px;
  }
  .inv-notes-block,
  .inv-bank-block { margin-left: 28px; margin-right: 28px; }

  .toolbar { padding: 10px 14px; }
  .toolbar-title { font-size: 13px; }
}

/* ─────────── MOBILE (≤ 768px) ─────────── */
@media (max-width: 768px) {
  :root { --sidebar-w: 300px; }

  body { font-size: 13px; }

  /* Sidebar devient un drawer overlay */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 88vw;
    max-width: 340px;
    min-width: 0;
    height: 100vh;
    z-index: 150;
    box-shadow: 4px 0 30px rgba(0, 0, 0, .25);
    transform: translateX(0);
    transition: transform .28s ease, width 0s;
  }
  .sidebar.collapsed {
    width: 88vw;
    max-width: 340px;
    min-width: 0;
    transform: translateX(-100%);
  }

  /* On masque le bouton flèche latéral qui n'a plus de sens */
  .sidebar-open-btn { display: none !important; }

  /* On affiche le bouton hamburger dans la toolbar */
  .btn-mobile-menu { display: flex; }

  .main-area { width: 100%; }

  /* Toolbar compacte */
  .toolbar {
    padding: 8px 10px;
    gap: 6px;
    flex-wrap: wrap;
  }
  .toolbar-left { gap: 8px; flex: 1; min-width: 0; }
  .toolbar-right { gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
  .toolbar-title {
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* Boutons toolbar : on garde l'icône, texte masqué */
  .btn { padding: 7px 10px; font-size: 12px; }
  .btn-primary, .btn-print {
    font-size: 0;
    padding: 7px 10px;
  }
  .btn-primary::before { content: '📥'; font-size: 15px; }
  .btn-print::before { content: '🖨️'; font-size: 15px; }

  .zoom-controls { padding: 2px 4px; }
  .btn-icon { width: 28px; height: 28px; font-size: 15px; }
  #zoomLabel { min-width: 34px; font-size: 11px; }

  /* Preview : la facture s'affiche en format téléphone (fluide) */
  .preview-container {
    padding: 12px 8px 24px;
    align-items: stretch;
  }
  .preview-scaler {
    width: 100%;
    transform: none !important;
    transform-origin: top left;
  }

  /* ═══ FACTURE EN FORMAT MOBILE ═══ */
  body:not(.exporting-pdf) .invoice-paper {
    width: 100%;
    min-height: auto;
    max-width: 500px;
    margin: 0 auto;
  }

  /* Header : stack vertical */
  body:not(.exporting-pdf) .inv-header {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 18px 16px;
    gap: 14px;
  }
  body:not(.exporting-pdf) .inv-header-left {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  body:not(.exporting-pdf) .inv-header-right {
    width: 100%;
    text-align: left;
    border-top: 1px solid var(--inv-border-color);
    padding-top: 12px;
  }
  body:not(.exporting-pdf) .inv-logo-wrap img {
    max-height: 56px;
    max-width: 140px;
  }
  body:not(.exporting-pdf) .inv-title {
    font-size: 24px;
    letter-spacing: 1.5px;
  }
  body:not(.exporting-pdf) .inv-number {
    font-size: 14px;
    margin: 2px 0 6px;
  }
  body:not(.exporting-pdf) .inv-company-name { font-size: 16px; }
  body:not(.exporting-pdf) .inv-company-info,
  body:not(.exporting-pdf) .inv-dates { font-size: 11px; }

  /* Bill-to pleine largeur */
  body:not(.exporting-pdf) .inv-bill {
    padding: 0 18px 18px;
  }
  body:not(.exporting-pdf) .inv-bill-box {
    min-width: 0;
    max-width: 100%;
    width: 100%;
    padding: 12px 14px;
  }
  body:not(.exporting-pdf) .inv-bill-name { font-size: 14px; }
  body:not(.exporting-pdf) .inv-bill-info { font-size: 11px; }

  /* ═══ TABLEAU → CARTES ═══ */
  body:not(.exporting-pdf) .inv-table-wrap {
    padding: 0 18px;
  }
  body:not(.exporting-pdf) .inv-table,
  body:not(.exporting-pdf) .inv-table tbody,
  body:not(.exporting-pdf) .inv-table tr,
  body:not(.exporting-pdf) .inv-table td {
    display: block;
    width: 100%;
  }
  body:not(.exporting-pdf) .inv-table thead { display: none; }
  body:not(.exporting-pdf) .inv-table tbody tr {
    background: var(--inv-table-row-odd) !important;
    border: 1px solid var(--inv-border-color);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    padding: 10px 12px;
    overflow: hidden;
  }
  body:not(.exporting-pdf) .inv-table tbody tr:nth-child(even) {
    background: var(--inv-table-row-even) !important;
  }
  body:not(.exporting-pdf) .inv-table td {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 10px;
    padding: 4px 0;
    border-bottom: none;
    text-align: left !important;
    font-size: 12px;
  }
  body:not(.exporting-pdf) .inv-table td::before {
    content: attr(data-label);
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--inv-muted);
    flex-shrink: 0;
  }
  body:not(.exporting-pdf) .inv-table td.td-desc {
    flex-direction: column;
    align-items: stretch;
    border-bottom: 1px dashed var(--inv-border-color);
    padding-bottom: 6px;
    margin-bottom: 4px;
  }
  body:not(.exporting-pdf) .inv-table td.td-desc::before {
    margin-bottom: 4px;
  }
  body:not(.exporting-pdf) .inv-table td.td-total {
    font-weight: 700;
    font-size: 13px;
    padding-top: 6px;
    margin-top: 4px;
    border-top: 1px dashed var(--inv-border-color);
  }
  body:not(.exporting-pdf) .inv-empty-row {
    display: block !important;
    padding: 20px;
    text-align: center;
    border: 1px dashed var(--inv-border-color);
    border-radius: var(--radius-sm);
  }
  body:not(.exporting-pdf) .inv-empty-row td {
    display: block !important;
    padding: 0 !important;
    text-align: center !important;
    font-size: 12px;
  }
  body:not(.exporting-pdf) .inv-empty-row td::before { display: none; }

  /* Totaux pleine largeur */
  body:not(.exporting-pdf) .inv-totals-wrap {
    padding: 14px 18px;
    justify-content: stretch;
  }
  body:not(.exporting-pdf) .inv-totals {
    min-width: 0;
    width: 100%;
  }
  body:not(.exporting-pdf) .inv-total-row {
    padding: 8px 14px;
    font-size: 12px;
  }
  body:not(.exporting-pdf) .inv-grand-total { font-size: 14px; }

  /* Notes / Banque */
  body:not(.exporting-pdf) .inv-notes-block,
  body:not(.exporting-pdf) .inv-bank-block {
    margin: 0 18px 14px;
    padding: 12px 14px;
  }
  body:not(.exporting-pdf) .inv-notes-block-body,
  body:not(.exporting-pdf) .inv-bank-block-body { font-size: 11px; }

  /* Footer */
  body:not(.exporting-pdf) .inv-footer {
    padding: 12px 18px;
  }
  body:not(.exporting-pdf) .inv-payment-terms { font-size: 11px; }

  /* Formulaires : une seule colonne */
  .form-row { grid-template-columns: 1fr; gap: 10px; }

  /* Items : description sur une ligne, qty/prix en dessous */
  .item-row { grid-template-columns: 1fr 1fr; }
  .item-row > :first-child { grid-column: 1 / -1; }

  /* Sidebar header */
  .sidebar-header { padding: 14px 14px 12px; }
  .section-header { padding: 12px 14px; }
  .section-body { padding: 12px 14px; }

  /* Touch targets plus grands */
  .form-input { padding: 10px 12px; font-size: 14px; }
  .theme-pill { padding: 8px 4px; }
  .btn-add-item { padding: 12px; }
  .toggle-field-header { padding: 10px 12px; }

  .sidebar-toggle {
    width: 32px;
    height: 32px;
    font-size: 20px;
  }
}

/* ─────────── EXPORT PDF : on force le format A4 même sur mobile ─────────── */
body.exporting-pdf .invoice-paper {
  width: 794px !important;
  min-height: 1100px !important;
  max-width: none !important;
  margin: 0 !important;
}
body.exporting-pdf .preview-scaler {
  transform: scale(1) !important;
  width: auto !important;
}

/* ─────────── PETIT MOBILE (≤ 480px) ─────────── */
@media (max-width: 480px) {
  .toolbar-title { display: none; }
  .preview-container { padding: 10px 6px 20px; }

  /* Paddings encore réduits sur la facture en format mobile */
  body:not(.exporting-pdf) .inv-header,
  body:not(.exporting-pdf) .inv-bill,
  body:not(.exporting-pdf) .inv-table-wrap,
  body:not(.exporting-pdf) .inv-totals-wrap,
  body:not(.exporting-pdf) .inv-footer {
    padding-left: 14px;
    padding-right: 14px;
  }
  body:not(.exporting-pdf) .inv-notes-block,
  body:not(.exporting-pdf) .inv-bank-block {
    margin-left: 14px;
    margin-right: 14px;
    padding: 10px 12px;
  }
  body:not(.exporting-pdf) .inv-title { font-size: 22px; }
}

/* ══════════════════════════════════════════════════════
   17. PRINT
══════════════════════════════════════════════════════ */
@media print {
  * { margin: 0; padding: 0; }
  html, body { width: 210mm; height: 297mm; margin: 0; padding: 0; }
  body { display: block; overflow: visible; }
  .sidebar, .toolbar, .sidebar-open-btn { display: none !important; }
  .main-area { height: auto; width: 210mm; margin: 0; padding: 0; background: none; }
  .preview-container { padding: 0; overflow: visible; background: none; margin: 0; width: 210mm; }
  .preview-scaler { transform: none !important; margin: 0; padding: 0; width: 210mm; }
  .invoice-paper {
    box-shadow: none;
    border-radius: 0;
    width: 210mm;
    height: auto;
    margin: 0;
    page-break-inside: avoid;
  }
  @page { size: A4; margin: 0; }
}