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

:root {
  --primary: #1a365d;
  --primary-light: #2a5298;
  --accent: #e53e3e;
  --bg: #f7f8fc;
  --card-bg: #ffffff;
  --text: #1a202c;
  --text-muted: #718096;
  --border: #e2e8f0;
  --success: #38a169;
  --warning: #d69e2e;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { max-width: 1400px; margin: 0 auto; padding: 2rem 1rem; }

header { margin-bottom: 1.5rem; }
header h1 { color: var(--primary); font-size: 1.8rem; margin-bottom: 0.25rem; }
.subtitle { color: var(--text-muted); font-size: 0.95rem; }

.breadcrumb { font-size: 0.85rem; margin-bottom: 0.5rem; }
.breadcrumb a { color: var(--primary-light); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
}
.card h2 {
  font-size: 1.05rem;
  color: var(--primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
}

/* Forms */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }
.form-grid-full { grid-column: 1 / -1; }
@media (max-width: 640px) {
  .form-grid, .form-grid-3 { grid-template-columns: 1fr; }
}
.form-group { display: flex; flex-direction: column; gap: 0.3rem; }
.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.form-group input,
.form-group select,
.form-group textarea {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  color: var(--text);
  background: #fff;
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 2px rgba(42, 82, 152, 0.12);
}

/* Buttons */
.btn-primary {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-primary:hover { background: var(--primary-light); }
.btn-secondary {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s;
}
.btn-secondary:hover { border-color: var(--primary-light); }
.btn-small {
  font-size: 0.8rem;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: #fff;
}
.btn-danger { border-color: #fc8181; color: var(--accent); }
.btn-danger:hover { background: #fff5f5; }
.btn-row { display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
th, td { padding: 0.6rem 0.75rem; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--bg); font-weight: 600; color: var(--text-muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #f8faff; }

/* Editor layout */
.editor-layout {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 1000px) {
  .editor-layout { grid-template-columns: 1fr; }
}

/* Spec cards */
.spec-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  background: var(--card-bg);
}
.spec-card-header {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  gap: 0.75rem;
  cursor: pointer;
  user-select: none;
}
.spec-card-header:hover { background: var(--bg); }
.spec-code {
  font-weight: 700;
  color: var(--primary);
  font-size: 0.9rem;
  min-width: 40px;
}
.spec-label { flex: 1; font-size: 0.875rem; color: var(--text-muted); }
.spec-toggle { font-size: 0.8rem; color: var(--text-muted); }
.spec-body { padding: 1rem; border-top: 1px solid var(--border); }
.spec-body .form-grid { grid-template-columns: 1fr 1fr; }

/* Preview panel */
.preview-panel {
  position: sticky;
  top: 1rem;
}
.preview-toolbar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  align-items: center;
  flex-wrap: wrap;
}
.preview-toolbar h3 { flex: 1; font-size: 1rem; color: var(--primary); }
.preview-frame {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-height: 80vh;
  overflow-y: auto;
  font-size: 0.82rem;
}

/* Spec document styles (preview + print) */
.spec-doc { margin-bottom: 3rem; page-break-after: always; }
.spec-doc:last-child { margin-bottom: 0; page-break-after: auto; }
.doc-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 3px solid var(--primary);
}
.doc-title { font-size: 1.1rem; font-weight: 700; color: var(--primary); }
.doc-meta { font-size: 0.78rem; color: var(--text-muted); text-align: right; }
.doc-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary);
  margin: 1rem 0 0.5rem;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--border);
}
.doc-row { display: flex; gap: 0; margin-bottom: 0.2rem; font-size: 0.8rem; }
.doc-row-label { width: 200px; flex-shrink: 0; font-weight: 600; color: var(--text-muted); }
.doc-row-value { flex: 1; }

/* Coat table */
.coat-table { width: 100%; border-collapse: collapse; margin: 0.75rem 0; font-size: 0.75rem; }
.coat-table th { background: var(--primary); color: #fff; padding: 0.4rem 0.5rem; text-align: center; font-size: 0.7rem; }
.coat-table td { padding: 0.35rem 0.5rem; border: 1px solid var(--border); vertical-align: top; }
.coat-table td:first-child { font-weight: 600; background: var(--bg); color: var(--text-muted); font-size: 0.7rem; }
.coat-table .coat-center { text-align: center; }

/* Boilerplate text */
.doc-boilerplate {
  font-size: 0.75rem;
  color: var(--text);
  line-height: 1.5;
  margin: 0.75rem 0;
  white-space: pre-wrap;
}
.doc-disclaimer {
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

/* Cover sheet */
.cover-sheet { margin-bottom: 3rem; page-break-after: always; }
.cover-title { font-size: 1.3rem; font-weight: 700; color: var(--primary); margin-bottom: 0.25rem; }
.cover-subtitle { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 1.5rem; }
.cover-meta-table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; font-size: 0.82rem; }
.cover-meta-table td { padding: 0.35rem 0.5rem; border-bottom: 1px solid var(--border); }
.cover-meta-table td:first-child { font-weight: 600; color: var(--text-muted); width: 160px; }
.toc-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.toc-table th { background: var(--primary); color: #fff; padding: 0.5rem 0.75rem; text-align: left; font-size: 0.78rem; }
.toc-table td { padding: 0.4rem 0.75rem; border-bottom: 1px solid var(--border); }

/* Alerts */
.alert { padding: 0.75rem 1rem; border-radius: 4px; font-size: 0.875rem; margin-bottom: 1rem; }
.alert-info { background: #ebf8ff; border-left: 3px solid #3182ce; color: #2b6cb0; }
.alert-success { background: #f0fff4; border-left: 3px solid var(--success); color: #276749; }

/* Empty state */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--text-muted); }
.empty-state p { margin-bottom: 1rem; }

/* Saved indicator */
.save-status { font-size: 0.8rem; color: var(--success); }

/* Modal */
.modal-overlay {
  display: none !important;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 1000;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem 1rem;
  overflow-y: auto;
}
.modal-overlay.is-open { display: flex !important; }
.modal-box {
  background: var(--card-bg);
  border-radius: var(--radius);
  width: 100%;
  max-width: 680px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.18);
  position: relative;
}
.modal-wide { max-width: 900px; }
.modal-header {
  padding: 1.25rem 1.5rem 1rem;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.modal-header h2 { font-size: 1.1rem; color: var(--primary); }
.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
  padding: 0 0.25rem;
}
.modal-close:hover { color: var(--text); }
.modal-body { padding: 1.25rem 1.5rem; max-height: 75vh; overflow-y: auto; }

/* Rules modal content */
.rules-category { margin-bottom: 2rem; }
.rules-category-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary);
  margin-bottom: 0.75rem;
  padding-bottom: 0.3rem;
  border-bottom: 2px solid var(--border);
}
.rule-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 0.75rem;
  overflow: hidden;
}
.rule-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.85rem;
  background: var(--bg);
  cursor: pointer;
  user-select: none;
}
.rule-card-header:hover { background: #eef2f8; }
.rule-name { font-weight: 600; font-size: 0.875rem; flex: 1; }
.rule-toggle { font-size: 0.75rem; color: var(--text-muted); }
.rule-body { padding: 0.85rem; font-size: 0.82rem; }
.rule-condition { color: var(--text-muted); margin-bottom: 0.6rem; font-style: italic; }
.rule-chips { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 0.5rem; }
.chip {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}
.chip-suggest { background: #c6f6d5; color: #276749; }
.chip-flag    { background: #feebc8; color: #975a16; }
.chip-label   { font-size: 0.7rem; font-weight: 400; color: var(--text-muted); margin-right: 0.25rem; }
.rule-basis { line-height: 1.55; color: var(--text); margin-top: 0.5rem; }
.rule-source { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.4rem; }

/* Audit view */
.audit-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 900px) { .audit-split { grid-template-columns: 1fr; } }
.audit-panel { display: flex; flex-direction: column; }
.audit-panel-header {
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 0.5rem 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 0.75rem;
}
.audit-pdf-iframe {
  width: 100%;
  height: 80vh;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* Diff table */
.diff-summary {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.diff-stat { font-size: 0.85rem; }
.diff-stat strong { font-size: 1.1rem; }
.diff-stat.match strong { color: var(--success); }
.diff-stat.close strong { color: #805ad5; }
.diff-stat.differ strong { color: var(--warning); }
.diff-stat.missing strong { color: var(--accent); }

.diff-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; margin-bottom: 1rem; }
.diff-table th { background: var(--primary); color: #fff; padding: 0.4rem 0.6rem; text-align: left; font-size: 0.75rem; }
.diff-table td { padding: 0.35rem 0.6rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.diff-table tr:last-child td { border-bottom: none; }
.diff-table td:first-child { color: var(--text-muted); font-weight: 600; width: 160px; }
.diff-match    { background: #f0fff4; }
.diff-close    { background: #faf5ff; }
.diff-differ   { background: #fffbeb; }
.diff-missing  { background: #fff5f5; }
.diff-badge {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  font-size: 0.7rem;
  font-weight: 700;
}
.badge-match   { background: #c6f6d5; color: #276749; }
.badge-close   { background: #e9d8fd; color: #553c9a; }
.badge-differ  { background: #feebc8; color: #975a16; }
.badge-missing { background: #fed7d7; color: #9b2335; }

/* Inline editable cells in preview */
.editable-cell {
  cursor: text;
  min-width: 60px;
  min-height: 1.2em;
  border-radius: 3px;
  transition: background 0.15s;
  vertical-align: top;
  padding: 0.35rem 0.5rem;
}
.editable-cell:hover { background: #fffbeb; outline: 1px dashed #d69e2e; }
.editable-cell:focus { background: #fefce8; outline: 2px solid #d69e2e; outline-offset: -1px; }
.editable-cell:empty::before { content: 'Click to add note…'; color: #a0aec0; font-style: italic; font-size: 0.7rem; }

/* Print styles */
@media print {
  header, .btn-row, .preview-toolbar, .editor-layout > *:first-child { display: none !important; }
  .preview-panel { position: static; }
  .preview-frame { border: none; padding: 0; max-height: none; overflow: visible; }
  .spec-doc { page-break-after: always; }
  .cover-sheet { page-break-after: always; }
  body { background: #fff; }
}