/* ── Variables ── */
:root {
  --color-primary: #1a3a5c;
  --color-secondary: #2e6da4;
  --color-accent: #4a9fd4;
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-border: #dee2e6;
  --color-text: #212529;
  --color-text-muted: #6c757d;
  --color-success: #28a745;
  --color-danger: #dc3545;
  --sidebar-width: 280px;
  --bottom-panel-height: 140px;
  --font: 'Inter', 'Source Sans 3', system-ui, sans-serif;
  --radius: 6px;
  --shadow: 0 2px 8px rgba(0,0,0,.08);
}

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

html, body { height: 100%; }

body {
  font-family: var(--font);
  font-size: 14px;
  background: var(--color-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
}

/* ── Top bar ── */
.topbar {
  background: var(--color-primary);
  color: #fff;
  padding: 0 20px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  box-shadow: 0 2px 4px rgba(0,0,0,.2);
  z-index: 100;
}

.topbar .brand {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.topbar .brand span {
  color: var(--color-accent);
}

.topbar-links a {
  color: rgba(255,255,255,.75);
  text-decoration: none;
  font-size: 13px;
  margin-left: 16px;
  transition: color .15s;
}

.topbar-links a:hover { color: #fff; }

/* ── Layout ── */
.app-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  padding-bottom: var(--bottom-panel-height);
}

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.sidebar-header h3 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.sidebar-search {
  width: 100%;
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
  outline: none;
}

.sidebar-search:focus { border-color: var(--color-secondary); }

/* Chapitre accordion */
.ch-item { border-bottom: 1px solid var(--color-border); }

.ch-header {
  display: flex;
  align-items: center;
  padding: 10px 14px;
  cursor: pointer;
  background: var(--color-surface);
  transition: background .1s;
  user-select: none;
}

.ch-header:hover { background: #f0f4f8; }

.ch-header input[type=checkbox] {
  margin-right: 8px;
  accent-color: var(--color-secondary);
  cursor: pointer;
}

.ch-header .ch-label {
  flex: 1;
  font-weight: 600;
  font-size: 13px;
  color: var(--color-primary);
}

.ch-header .ch-badge {
  background: var(--color-secondary);
  color: #fff;
  font-size: 11px;
  border-radius: 10px;
  padding: 1px 7px;
  min-width: 20px;
  text-align: center;
  margin-right: 6px;
}

.ch-header .ch-badge.zero { background: #adb5bd; }

.ch-toggle {
  font-size: 11px;
  color: var(--color-text-muted);
  transition: transform .2s;
}

.ch-item.open .ch-toggle { transform: rotate(180deg); }

.sc-list { display: none; background: #fafbfc; }
.ch-item.open .sc-list { display: block; }

.sc-item {
  display: flex;
  align-items: center;
  padding: 7px 14px 7px 28px;
  cursor: pointer;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-secondary);
  transition: background .1s;
}

.sc-item:hover { background: #edf2f7; }

.sc-item input[type=checkbox] {
  margin-right: 8px;
  accent-color: var(--color-secondary);
}

/* ── Main content ── */
.main-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
}

.content-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.search-box {
  flex: 1;
  min-width: 200px;
  max-width: 420px;
  display: flex;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0 12px;
  gap: 8px;
}

.search-box input {
  flex: 1;
  border: none;
  outline: none;
  padding: 8px 0;
  font-size: 14px;
  background: transparent;
}

.search-icon { color: var(--color-text-muted); }

.selection-info {
  font-size: 13px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.selection-info span {
  font-weight: 700;
  color: var(--color-secondary);
}

.btn-clear {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 6px 12px;
  font-size: 13px;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all .15s;
}

.btn-clear:hover {
  background: var(--color-danger);
  color: #fff;
  border-color: var(--color-danger);
}

/* Article list */
.articles-list { display: flex; flex-direction: column; gap: 4px; }

.article-row {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px 14px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  transition: all .15s;
}

.article-row:hover { border-color: var(--color-accent); background: #f7fafd; }

.article-row.selected {
  border-color: var(--color-secondary);
  background: #edf4fb;
}

.article-row input[type=checkbox] {
  margin-top: 2px;
  accent-color: var(--color-secondary);
  cursor: pointer;
  flex-shrink: 0;
}

.article-numero {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-secondary);
  min-width: 80px;
  flex-shrink: 0;
}

.article-label {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.article-unite {
  font-size: 11px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--color-text-muted);
}

.article-info-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 15px;
  padding: 0;
  line-height: 1;
  transition: color .15s;
}

.article-info-btn:hover { color: var(--color-secondary); }

/* Chapter separator in article list */
.chapter-sep {
  background: var(--color-primary);
  color: #fff;
  padding: 6px 14px;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .3px;
  border-radius: var(--radius);
  margin-top: 12px;
  text-transform: uppercase;
}

.sub-chapter-sep {
  color: var(--color-secondary);
  padding: 4px 14px 2px;
  font-weight: 600;
  font-size: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-top: 4px;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
}

.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 14px; }

/* ── Bottom Panel ── */
.bottom-panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-panel-height);
  background: var(--color-surface);
  border-top: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  box-shadow: 0 -2px 8px rgba(0,0,0,.06);
  z-index: 50;
}

.project-fields {
  display: flex;
  gap: 10px;
  flex: 1;
  flex-wrap: wrap;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.field-group label {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: .3px;
}

.field-group input {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-size: 13px;
  outline: none;
  min-width: 140px;
  background: var(--color-bg);
  transition: border-color .15s;
}

.field-group input:focus { border-color: var(--color-secondary); }

.generate-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
  flex-shrink: 0;
}

.format-checks {
  display: flex;
  gap: 12px;
}

.format-checks label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  cursor: pointer;
  font-weight: 500;
}

.format-checks input { accent-color: var(--color-secondary); }

.btn-generate {
  background: var(--color-secondary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
  white-space: nowrap;
}

.btn-generate:hover { background: var(--color-primary); }
.btn-generate:disabled { background: #adb5bd; cursor: not-allowed; }

/* Download links */
.download-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.dl-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 5px 12px;
  font-size: 13px;
  color: var(--color-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all .15s;
}

.dl-link:hover {
  background: var(--color-secondary);
  color: #fff;
  border-color: var(--color-secondary);
}

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.modal {
  background: var(--color-surface);
  border-radius: 8px;
  padding: 24px;
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0,0,0,.2);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.modal-header h3 { font-size: 15px; color: var(--color-primary); }

.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
  padding: 0 4px;
}

.modal-numero {
  font-size: 12px;
  color: var(--color-secondary);
  font-weight: 700;
  margin-bottom: 4px;
}

.modal-unite {
  display: inline-block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.modal-description {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text);
  white-space: pre-wrap;
}

/* ── Toast ── */
.toast {
  position: fixed;
  top: 60px;
  right: 20px;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  z-index: 999;
  opacity: 0;
  transition: opacity .3s;
  max-width: 360px;
  box-shadow: var(--shadow);
}

.toast.show { opacity: 1; }
.toast.error { background: var(--color-danger); }
.toast.success { background: var(--color-success); }

/* ── Spinner ── */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}

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

/* ── Admin styles ── */
.admin-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.admin-nav {
  width: 220px;
  background: var(--color-primary);
  flex-shrink: 0;
  padding-top: 16px;
}

.admin-nav a {
  display: block;
  padding: 10px 20px;
  color: rgba(255,255,255,.75);
  text-decoration: none;
  font-size: 14px;
  transition: all .15s;
  border-left: 3px solid transparent;
}

.admin-nav a:hover,
.admin-nav a.active {
  background: rgba(255,255,255,.1);
  color: #fff;
  border-left-color: var(--color-accent);
}

.admin-main {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.admin-section { display: none; }
.admin-section.active { display: block; }

.admin-section h2 {
  font-size: 18px;
  color: var(--color-primary);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .15s;
}

.btn-primary { background: var(--color-secondary); color: #fff; }
.btn-primary:hover { background: var(--color-primary); }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { background: #a71d2a; }
.btn-secondary { background: var(--color-bg); border: 1px solid var(--color-border); color: var(--color-text); }
.btn-secondary:hover { background: var(--color-border); }
.btn-sm { padding: 4px 10px; font-size: 12px; }

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: .3px;
  margin-bottom: 5px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: 14px;
  outline: none;
  background: var(--color-bg);
  font-family: var(--font);
  transition: border-color .15s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--color-secondary); }

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

.tree-container { font-size: 13px; }

.tree-ch {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  overflow: hidden;
}

.tree-ch-header {
  background: #edf2f7;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.tree-ch-header:hover { background: #dde5f0; }

.tree-ch-label {
  font-weight: 700;
  color: var(--color-primary);
}

.tree-ch-actions { display: flex; gap: 6px; }

.tree-sc {
  border-top: 1px solid var(--color-border);
  background: #fafbfc;
}

.tree-sc-header {
  padding: 8px 14px 8px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tree-sc-label { color: var(--color-secondary); font-style: italic; }

.tree-articles { padding: 0; }

.tree-article {
  padding: 6px 14px 6px 44px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #fff;
}

.tree-article:hover { background: #f7fafd; }

.tree-art-info { flex: 1; }
.tree-art-num { font-weight: 700; color: var(--color-secondary); font-size: 12px; }
.tree-art-lbl { font-size: 12px; color: var(--color-text-muted); }

.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th {
  background: var(--color-primary);
  color: #fff;
  padding: 8px 12px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
}
.table td { padding: 8px 12px; border-bottom: 1px solid var(--color-border); }
.table tr:hover td { background: #f7fafd; }

/* Login page */
.login-wrap {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
}

.login-box {
  background: var(--color-surface);
  border-radius: 10px;
  padding: 36px 40px;
  width: 340px;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
}

.login-box h2 {
  font-size: 20px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.login-box p { font-size: 13px; color: var(--color-text-muted); margin-bottom: 24px; }

/* Responsive */
@media (max-width: 900px) {
  .sidebar { width: 220px; }
  .project-fields { flex-wrap: wrap; }
  .field-group input { min-width: 110px; }
  --bottom-panel-height: 180px;
}